:root {
  --paper: #f6f9f4;
  --paper-2: #eef5ef;
  --ink: #10241d;
  --ink-2: #244238;
  --muted: #66776f;
  --line: rgba(16, 36, 29, 0.14);
  --line-strong: rgba(16, 36, 29, 0.24);
  --green: #0f8f68;
  --green-2: #23c58e;
  --cyan: #167ea1;
  --amber: #b77a14;
  --white: rgba(255, 255, 255, 0.74);
  --shadow: rgba(22, 55, 43, 0.14);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  max-width: 100%;
  overflow-x: hidden;
}

body {
  margin: 0;
  min-height: 100vh;
  max-width: 100%;
  background:
    linear-gradient(rgba(16, 36, 29, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(16, 36, 29, 0.035) 1px, transparent 1px),
    var(--paper);
  background-size: 36px 36px, 36px 36px, auto;
  color: var(--ink);
  font-family: "Sora", "Segoe UI", sans-serif;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  font: inherit;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 1rem;
  align-items: center;
  min-height: 4.4rem;
  padding: 0.75rem 2rem;
  border-bottom: 1px solid var(--line);
  background: rgba(246, 249, 244, 0.86);
  backdrop-filter: blur(18px);
  overflow: hidden;
}

.site-header > * {
  min-width: 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  color: var(--ink);
  font-family: "JetBrains Mono", "Courier New", monospace;
  font-size: 0.88rem;
  font-weight: 700;
  white-space: nowrap;
}

.brand.compact {
  font-size: 0.8rem;
}

.brand-mark {
  width: 1.08rem;
  height: 1.08rem;
  border: 2px solid var(--ink);
  border-radius: 50%;
  background:
    linear-gradient(90deg, transparent 48%, var(--ink) 49%, var(--ink) 51%, transparent 52%),
    linear-gradient(0deg, transparent 48%, var(--ink) 49%, var(--ink) 51%, transparent 52%),
    var(--green-2);
}

.site-nav {
  justify-self: center;
  display: flex;
  align-items: center;
  gap: 0.3rem;
  max-width: 100%;
  padding: 0.28rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.58);
  box-shadow: 0 0.5rem 1.8rem rgba(22, 55, 43, 0.06);
}

.site-nav a,
.header-action,
.button,
.path-options button,
.library-toolbar button {
  font-family: "JetBrains Mono", "Courier New", monospace;
  font-size: 0.78rem;
  font-weight: 700;
}

.site-nav a {
  min-height: 2.15rem;
  padding: 0.52rem 0.75rem;
  border-radius: 6px;
  color: var(--muted);
  white-space: nowrap;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--ink);
  background: rgba(16, 36, 29, 0.06);
}

.header-action {
  justify-self: end;
  min-height: 2.65rem;
  padding: 0.76rem 0.95rem;
  border: 1px solid var(--ink);
  border-radius: 6px;
  color: var(--paper);
  background: var(--ink);
  box-shadow: 0 0.8rem 1.8rem rgba(16, 36, 29, 0.16);
}

main {
  position: relative;
}

.hero-section,
.section {
  width: min(1180px, calc(100% - 2rem));
  margin: 0 auto;
}

.hero-section {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(20rem, 0.72fr);
  gap: 2rem;
  align-items: center;
  min-height: calc(100vh - 4.4rem);
  padding: 4.5rem 0;
}

.hero-section > *,
.section > * {
  min-width: 0;
}

.hero-copy,
.section-heading,
.free-copy {
  min-width: 0;
  max-width: 52rem;
}

.eyebrow {
  margin: 0 0 0.95rem;
  color: var(--green);
  font-family: "JetBrains Mono", "Courier New", monospace;
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 1.25rem;
  color: var(--ink);
  font-family: "Source Serif 4", Georgia, serif;
  font-size: 4.9rem;
  font-weight: 700;
  line-height: 0.94;
  letter-spacing: 0;
  overflow-wrap: break-word;
}

h2 {
  margin-bottom: 1rem;
  color: var(--ink);
  font-family: "Source Serif 4", Georgia, serif;
  font-size: 3rem;
  font-weight: 700;
  line-height: 1.02;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 0.65rem;
  color: var(--ink);
  font-size: 1.18rem;
  line-height: 1.25;
  letter-spacing: 0;
}

p {
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.72;
  overflow-wrap: break-word;
}

.hero-text {
  max-width: 47rem;
  font-size: 1.07rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 2rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3rem;
  padding: 0 1rem;
  border-radius: 6px;
  transition:
    transform 160ms ease,
    box-shadow 160ms ease,
    background 160ms ease;
}

.button:hover,
.button:focus-visible {
  transform: translateY(-2px);
}

.button.primary {
  border: 1px solid var(--green);
  color: white;
  background: var(--green);
  box-shadow: 0 1rem 2rem rgba(15, 143, 104, 0.22);
}

.button.secondary {
  border: 1px solid var(--line-strong);
  color: var(--ink);
  background: rgba(255, 255, 255, 0.64);
}

.pathfinder,
.path-card,
.method-grid article,
.course-row,
.syllabus-card,
.syllabus-list,
.pricing-panel article {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.68);
  box-shadow: 0 1.4rem 4rem var(--shadow);
}

.pathfinder {
  min-width: 0;
  padding: 1.1rem;
}

.panel-heading {
  display: grid;
  gap: 0.45rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--line);
}

.panel-heading span,
.recommendation span,
.path-card span,
.method-grid span,
.course-row span,
.syllabus-card span,
.pricing-panel span {
  color: var(--green);
  font-family: "JetBrains Mono", "Courier New", monospace;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
}

.panel-heading strong {
  font-size: 1.35rem;
}

.path-options {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 1rem 0;
}

.path-options button,
.library-toolbar button {
  min-height: 2.4rem;
  padding: 0 0.72rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  background: rgba(255, 255, 255, 0.7);
  cursor: pointer;
}

.path-options button.active,
.library-toolbar button.active {
  border-color: var(--ink);
  color: var(--paper);
  background: var(--ink);
}

.recommendation {
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background:
    linear-gradient(135deg, rgba(15, 143, 104, 0.12), transparent 48%),
    rgba(255, 255, 255, 0.7);
}

.recommendation h2 {
  margin-top: 0.6rem;
  font-size: 2rem;
}

.track-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1rem;
}

.track-stats span {
  padding: 0.5rem 0.65rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--ink);
  background: var(--white);
}

.proof-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: rgba(16, 36, 29, 0.92);
}

.proof-strip article {
  min-height: 8.6rem;
  padding: 1.35rem 2rem;
  border-right: 1px solid rgba(246, 249, 244, 0.16);
}

.proof-strip article:last-child {
  border-right: 0;
}

.proof-strip strong {
  display: block;
  margin-bottom: 0.55rem;
  color: var(--paper);
  font-size: 1.15rem;
}

.proof-strip span {
  color: rgba(246, 249, 244, 0.72);
  line-height: 1.55;
}

.section {
  padding: 6rem 0;
}

.section-heading {
  margin-bottom: 2.2rem;
}

.path-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1rem;
}

.path-card {
  min-height: 24rem;
  padding: 1.15rem;
}

.path-card.featured {
  grid-column: span 2;
  background:
    linear-gradient(135deg, rgba(15, 143, 104, 0.13), rgba(255, 255, 255, 0.72) 55%),
    rgba(255, 255, 255, 0.72);
}

.path-card p {
  min-height: 7rem;
}

.path-card ul {
  display: grid;
  gap: 0.45rem;
  margin: 1rem 0 0;
  padding: 0;
  list-style: none;
}

.path-card li {
  padding: 0.58rem 0;
  border-top: 1px solid var(--line);
  color: var(--ink-2);
  font-size: 0.92rem;
}

.method-section {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.38);
}

.method-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.method-grid article {
  min-height: 17rem;
  padding: 1.15rem;
}

.library-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.course-list {
  display: grid;
  gap: 0.75rem;
}

.course-row {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(16rem, 0.55fr);
  gap: 1rem;
  align-items: center;
  min-height: 7rem;
  padding: 1rem;
}

.course-row.is-hidden {
  display: none;
}

.course-row p {
  justify-self: end;
  margin-bottom: 0;
  color: var(--ink-2);
  font-family: "JetBrains Mono", "Courier New", monospace;
  font-size: 0.82rem;
  text-align: right;
}

.syllabus-section {
  background:
    linear-gradient(90deg, rgba(22, 126, 161, 0.09), transparent 36%),
    transparent;
}

.syllabus {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
  gap: 1rem;
  align-items: start;
}

.syllabus-card,
.syllabus-list {
  padding: 1.15rem;
}

.syllabus-card h3 {
  font-size: 1.6rem;
}

.syllabus-list {
  display: grid;
  gap: 0.5rem;
}

.syllabus-list article {
  display: grid;
  grid-template-columns: 3rem 1fr;
  gap: 0.75rem;
  align-items: center;
  min-height: 3.25rem;
  border-bottom: 1px solid var(--line);
  color: var(--ink-2);
}

.syllabus-list article:last-child {
  border-bottom: 0;
}

.syllabus-list span {
  color: var(--cyan);
  font-family: "JetBrains Mono", "Courier New", monospace;
  font-weight: 700;
}

.free-section {
  display: grid;
  grid-template-columns: minmax(0, 0.82fr) minmax(0, 1.18fr);
  gap: 2rem;
  align-items: start;
}

.pricing-panel {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.pricing-panel article {
  min-height: 16rem;
  padding: 1.15rem;
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.5rem 2rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  background: rgba(255, 255, 255, 0.58);
}

.course-hero {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(20rem, 0.7fr);
  gap: 2rem;
  align-items: center;
  width: min(1180px, calc(100% - 2rem));
  min-height: calc(100vh - 4.4rem);
  margin: 0 auto;
  padding: 4.5rem 0;
}

.course-hero > *,
.module-card > * {
  min-width: 0;
}

.course-hero-copy {
  max-width: 52rem;
}

.course-hero-copy p {
  max-width: 46rem;
  font-size: 1.06rem;
}

.course-summary-card,
.principle-grid article,
.module-card,
.lesson-preview,
.outcome-grid article {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.7);
  box-shadow: 0 1.4rem 4rem var(--shadow);
}

.course-summary-card {
  padding: 1.15rem;
}

.course-summary-card span,
.module-card span,
.principle-grid span,
.lesson-panel span {
  color: var(--green);
  font-family: "JetBrains Mono", "Courier New", monospace;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
}

.course-summary-card strong {
  display: block;
  margin: 0.65rem 0 0.85rem;
  color: var(--ink);
  font-family: "Source Serif 4", Georgia, serif;
  font-size: 2rem;
  line-height: 1.08;
}

.course-summary-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1rem;
}

.course-summary-grid span {
  padding: 0.5rem 0.65rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--ink);
  background: rgba(255, 255, 255, 0.75);
}

.principle-grid,
.outcome-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1rem;
}

.principle-grid article,
.outcome-grid article {
  min-height: 15rem;
  padding: 1.15rem;
}

.module-list {
  display: grid;
  gap: 0.85rem;
}

.module-card {
  display: grid;
  grid-template-columns: 4.2rem 1fr;
  gap: 1rem;
  padding: 1rem;
}

.module-card.highlight {
  border-color: rgba(15, 143, 104, 0.38);
  background:
    linear-gradient(135deg, rgba(15, 143, 104, 0.11), rgba(255, 255, 255, 0.76) 44%),
    rgba(255, 255, 255, 0.76);
}

.module-index {
  display: grid;
  place-items: center;
  width: 3.2rem;
  height: 3.2rem;
  border: 1px solid var(--ink);
  border-radius: 50%;
  color: var(--paper);
  background: var(--ink);
  font-family: "JetBrains Mono", "Courier New", monospace;
  font-size: 0.85rem;
  font-weight: 700;
}

.module-card ul {
  display: grid;
  gap: 0.42rem;
  margin: 1rem 0 0;
  padding: 0;
  list-style: none;
}

.module-card li {
  position: relative;
  padding-left: 1rem;
  color: var(--ink-2);
  line-height: 1.5;
}

.module-card li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62rem;
  width: 0.35rem;
  height: 0.35rem;
  border-radius: 50%;
  background: var(--green);
}

.module-intro {
  max-width: 58rem;
  margin-bottom: 1rem;
}

.module-curriculum {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(0, 0.9fr);
  gap: 0.75rem;
  margin-top: 1rem;
}

.module-block {
  min-width: 0;
  padding: 0.9rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.62);
}

.module-block.lesson-block,
.module-block.lab-block {
  grid-row: span 2;
}

.module-block h4 {
  margin: 0 0 0.65rem;
  color: var(--ink);
  font-family: "JetBrains Mono", "Courier New", monospace;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  text-transform: uppercase;
}

.module-block ol,
.module-block ul {
  display: grid;
  gap: 0.45rem;
  margin: 0;
  padding-left: 1.1rem;
}

.module-block li {
  padding-left: 0.15rem;
  color: var(--ink-2);
  font-size: 0.92rem;
  line-height: 1.48;
}

.module-block li::before {
  content: none;
}

.module-block.output-block {
  grid-column: 1 / -1;
  background:
    linear-gradient(135deg, rgba(15, 143, 104, 0.08), transparent 54%),
    rgba(255, 255, 255, 0.66);
}

.lab-section {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.36);
}

.lesson-preview {
  padding: 1.15rem;
}

.lesson-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.lesson-tabs button {
  min-height: 2.45rem;
  padding: 0 0.75rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  background: rgba(255, 255, 255, 0.7);
  font-family: "JetBrains Mono", "Courier New", monospace;
  font-size: 0.78rem;
  font-weight: 700;
  cursor: pointer;
}

.lesson-tabs button.active {
  border-color: var(--ink);
  color: var(--paper);
  background: var(--ink);
}

.lesson-panel {
  min-height: 12rem;
  padding: 1.15rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background:
    linear-gradient(135deg, rgba(22, 126, 161, 0.08), transparent 55%),
    rgba(255, 255, 255, 0.74);
}

.lesson-panel h3 {
  margin-top: 0.55rem;
  font-family: "Source Serif 4", Georgia, serif;
  font-size: 2rem;
}

.site-nav a[aria-current="page"] {
  color: var(--ink);
  background: rgba(16, 36, 29, 0.08);
}

.clean-hero {
  min-height: calc(92vh - 4.4rem);
}

.small-button {
  min-height: 2.6rem;
  margin-top: 1rem;
}

.library-hero {
  padding-top: 5rem;
}

.library-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.library-card,
.material-card {
  display: grid;
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.7);
  box-shadow: 0 1.4rem 4rem var(--shadow);
}

.library-card {
  min-height: 24rem;
  padding: 1.15rem;
  transition:
    transform 180ms ease,
    border-color 180ms ease,
    box-shadow 180ms ease;
}

.library-card:hover,
.library-card:focus-visible {
  border-color: rgba(15, 143, 104, 0.45);
  box-shadow: 0 1.8rem 4.6rem rgba(22, 55, 43, 0.18);
  transform: translateY(-4px);
}

.library-card.featured {
  grid-column: span 2;
  background:
    linear-gradient(135deg, rgba(15, 143, 104, 0.14), rgba(255, 255, 255, 0.74) 54%),
    rgba(255, 255, 255, 0.74);
}

.library-card span,
.library-card-meta small,
.material-card span {
  color: var(--green);
  font-family: "JetBrains Mono", "Courier New", monospace;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
}

.library-card h3 {
  font-family: "Source Serif 4", Georgia, serif;
  font-size: 1.8rem;
  line-height: 1.04;
}

.library-card p {
  margin-bottom: 1.25rem;
}

.library-card.is-hidden {
  display: none;
}

.library-card-meta {
  display: grid;
  gap: 0.65rem;
  align-self: end;
  margin-top: auto;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
}

.library-card-meta strong {
  color: var(--ink);
  font-size: 0.94rem;
}

.library-card-meta small {
  color: var(--muted);
  line-height: 1.55;
  text-transform: none;
}

.material-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 0.85rem;
  margin-top: 1rem;
}

.material-card {
  min-height: 20rem;
  padding: 1rem;
}

.material-card h3 {
  font-size: 1.05rem;
}

.material-card ul {
  display: grid;
  gap: 0.42rem;
  margin: auto 0 0;
  padding: 1rem 0 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.material-card li {
  color: var(--ink-2);
  font-size: 0.9rem;
  line-height: 1.45;
}

.course-back {
  margin-top: 2rem;
}

[data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition:
    opacity 520ms ease,
    transform 520ms ease;
}

[data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 1120px) {
  .path-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .library-grid,
  .material-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .method-grid,
  .principle-grid,
  .outcome-grid,
  .pricing-panel {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 900px) {
  .site-header {
    grid-template-columns: 1fr;
    align-items: start;
    padding: 0.85rem 1rem 0.75rem;
  }

  .site-nav {
    justify-self: stretch;
    width: 100%;
    max-width: calc(100vw - 2rem);
    overflow-x: auto;
    scrollbar-width: none;
  }

  .site-nav::-webkit-scrollbar {
    display: none;
  }

  .header-action {
    display: none;
  }

  .hero-section,
  .course-hero,
  .syllabus,
  .free-section {
    grid-template-columns: 1fr;
  }

  .hero-section {
    min-height: auto;
    padding-top: 3.5rem;
  }

  .course-hero {
    min-height: auto;
    padding-top: 3.5rem;
  }

  h1 {
    font-size: 3.45rem;
  }

  h2 {
    font-size: 2.35rem;
  }

  .proof-strip {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .proof-strip article {
    border-bottom: 1px solid rgba(246, 249, 244, 0.16);
  }

  .course-row {
    grid-template-columns: 1fr;
  }

  .course-row p {
    justify-self: start;
    text-align: left;
  }
}

@media (max-width: 620px) {
  .hero-section,
  .course-hero,
  .section {
    width: min(100% - 1rem, 1180px);
  }

  h1 {
    font-size: 1.95rem;
    line-height: 1.02;
  }

  .course-hero h1 {
    font-size: 1.7rem;
    line-height: 1.08;
    text-wrap: balance;
  }

  .course-summary-card strong {
    font-size: 1.55rem;
    line-height: 1.12;
    overflow-wrap: anywhere;
  }

  .hero-copy,
  .section-heading,
  .free-copy {
    max-width: 22rem;
  }

  h2 {
    font-size: 2rem;
  }

  .hero-actions,
  .button {
    width: 100%;
  }

  .proof-strip,
  .path-grid,
  .method-grid,
  .principle-grid,
  .outcome-grid,
  .pricing-panel {
    grid-template-columns: 1fr;
  }

  .path-card.featured {
    grid-column: auto;
  }

  .library-card.featured {
    grid-column: auto;
  }

  .path-card,
  .library-card,
  .material-card,
  .method-grid article,
  .principle-grid article,
  .outcome-grid article,
  .pricing-panel article {
    min-height: auto;
  }

  .path-card p {
    min-height: auto;
  }

  .proof-strip article {
    min-height: auto;
    padding: 1rem;
    border-right: 0;
  }

  .pathfinder,
  .recommendation,
  .course-summary-card,
  .lesson-preview,
  .library-card,
  .material-card,
  .syllabus-card,
  .syllabus-list {
    padding: 0.9rem;
  }

  .library-grid,
  .material-grid {
    grid-template-columns: 1fr;
  }

  .module-card {
    grid-template-columns: 1fr;
  }

  .module-curriculum {
    grid-template-columns: 1fr;
  }

  .module-block.lesson-block,
  .module-block.lab-block,
  .module-block.output-block {
    grid-column: auto;
    grid-row: auto;
  }

  .syllabus-list article {
    grid-template-columns: 1fr;
    align-items: start;
    padding: 0.75rem 0;
  }

  .site-footer {
    align-items: flex-start;
    flex-direction: column;
    padding: 1.2rem 1rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* Collection layout inspired by course marketplaces: image-first, quick-scan cards. */
.collection-page .section {
  width: min(1180px, calc(100% - 2rem));
}

.collection-hero {
  padding: 4.8rem 0 1.2rem;
}

.compact-heading {
  max-width: 52rem;
  margin-bottom: 1.35rem;
}

.compact-heading h1 {
  margin-bottom: 0.85rem;
  font-size: clamp(2.4rem, 7vw, 4.4rem);
}

.collection-toolbar {
  margin-bottom: 0;
}

.course-collection {
  position: relative;
  padding: 2.1rem 0 2.4rem;
}

.collection-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
}

.collection-heading h2 {
  margin-bottom: 0;
  font-family: "Sora", "Segoe UI", sans-serif;
  font-size: 1.35rem;
  line-height: 1.2;
}

.collection-heading h2 a {
  color: #6a2cf4;
  text-decoration: underline;
  text-decoration-thickness: 0.12em;
  text-underline-offset: 0.14em;
}

.collection-heading span {
  color: var(--muted);
  font-family: "JetBrains Mono", "Courier New", monospace;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
}

.collection-strip {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 1rem;
}

.wrap-strip {
  grid-template-columns: repeat(5, minmax(0, 1fr));
}

.collection-page .library-card {
  display: block;
  min-height: 0;
  padding: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
  transition: transform 160ms ease;
}

.collection-page .library-card:hover,
.collection-page .library-card:focus-visible {
  border-color: transparent;
  box-shadow: none;
  transform: translateY(-3px);
}

.collection-page .library-card.is-hidden {
  display: none;
}

.course-cover {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border: 1px solid var(--line);
  background: var(--paper-2);
}

.collection-page .library-card h3 {
  display: -webkit-box;
  min-height: 2.9rem;
  margin: 0.7rem 0 0.28rem;
  overflow: hidden;
  color: #121a35;
  font-family: "Sora", "Segoe UI", sans-serif;
  font-size: 0.93rem;
  font-weight: 800;
  line-height: 1.25;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
}

.course-author {
  margin-bottom: 0.25rem;
  color: #5f6680;
  font-size: 0.76rem;
  line-height: 1.35;
}

.course-rating {
  display: flex;
  align-items: center;
  gap: 0.28rem;
  color: #a95600;
  font-size: 0.78rem;
  line-height: 1;
}

.course-rating strong {
  font-weight: 800;
}

.course-rating span {
  color: #b4690e;
  font-family: "Sora", "Segoe UI", sans-serif;
  font-size: 0.72rem;
  letter-spacing: 0.05em;
}

.course-rating small {
  color: #596178;
}

.collection-arrow {
  position: absolute;
  top: 50%;
  right: -1.85rem;
  display: grid;
  place-items: center;
  width: 3rem;
  height: 3rem;
  border: 0;
  border-radius: 50%;
  color: #121a35;
  background: white;
  box-shadow: 0 0.8rem 2.2rem rgba(16, 36, 29, 0.16);
  font-size: 2.1rem;
  line-height: 1;
}

@media (max-width: 1120px) {
  .collection-strip,
  .wrap-strip {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (max-width: 900px) {
  .collection-strip,
  .wrap-strip {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .collection-arrow {
    display: none;
  }
}

@media (max-width: 620px) {
  .collection-page .section {
    width: min(100% - 1rem, 1180px);
  }

  .collection-hero {
    padding-top: 3.4rem;
  }

  .collection-heading {
    align-items: start;
    flex-direction: column;
  }

  .collection-strip,
  .wrap-strip {
    display: flex;
    gap: 0.85rem;
    margin-right: -0.5rem;
    overflow-x: auto;
    padding-bottom: 0.65rem;
    scroll-snap-type: x mandatory;
    scrollbar-width: none;
  }

  .collection-strip::-webkit-scrollbar,
  .wrap-strip::-webkit-scrollbar {
    display: none;
  }

  .collection-page .library-card {
    flex: 0 0 76%;
    scroll-snap-align: start;
  }

  .all-courses .library-card {
    flex-basis: 82%;
  }
}

/* CyberOptic v2: compact marketplace cards + interactive course studio. */
body {
  background:
    radial-gradient(circle at 12% 0%, rgba(35, 197, 142, 0.12), transparent 30rem),
    radial-gradient(circle at 86% 8%, rgba(245, 158, 11, 0.12), transparent 28rem),
    linear-gradient(rgba(16, 36, 29, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(16, 36, 29, 0.035) 1px, transparent 1px),
    var(--paper);
  background-size: auto, auto, 34px 34px, 34px 34px, auto;
}

.collection-page .collection-strip,
.collection-page .wrap-strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.25rem;
}

.collection-page .compact-course-card {
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(16, 36, 29, 0.14);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.86);
  box-shadow: 0 1.2rem 3.2rem rgba(16, 36, 29, 0.1);
  transition:
    transform 180ms ease,
    border-color 180ms ease,
    box-shadow 180ms ease;
}

.collection-page .compact-course-card:hover,
.collection-page .compact-course-card:focus-visible {
  border-color: rgba(15, 143, 104, 0.46);
  box-shadow: 0 1.8rem 4rem rgba(16, 36, 29, 0.18);
  transform: translateY(-5px);
}

.collection-page .course-cover {
  width: 100%;
  aspect-ratio: 16 / 9;
  border: 0;
  object-fit: cover;
}

.card-copy {
  display: grid;
  gap: 0.32rem;
  padding: 0.95rem 1rem 1.05rem;
}

.card-copy span,
.auth-card span,
.my-library-panel > span,
.video-simulator span,
.animation-simulator span,
.mission-simulator span,
.punchy-outcomes span {
  color: var(--green);
  font-family: "JetBrains Mono", "Courier New", monospace;
  font-size: 0.73rem;
  font-weight: 800;
  text-transform: uppercase;
}

.collection-page .compact-course-card h3 {
  min-height: 2.55rem;
  margin: 0;
  color: #111827;
  font-size: 0.98rem;
  font-weight: 800;
  line-height: 1.26;
}

.collection-page .compact-course-card p {
  margin: 0;
  color: #5b6474;
  font-size: 0.78rem;
  line-height: 1.45;
}

.user-shelf-section {
  padding-top: 1.4rem;
  padding-bottom: 2rem;
}

.user-shelf-card {
  display: grid;
  grid-template-columns: minmax(18rem, 0.44fr) minmax(0, 1fr);
  gap: 1rem;
  padding: 1rem;
  border: 1px solid rgba(16, 36, 29, 0.14);
  border-radius: 22px;
  background:
    linear-gradient(135deg, rgba(15, 143, 104, 0.08), rgba(255, 255, 255, 0.78)),
    rgba(255, 255, 255, 0.82);
  box-shadow: 0 1.5rem 4rem rgba(16, 36, 29, 0.12);
}

.auth-card,
.my-library-panel {
  display: grid;
  gap: 0.75rem;
  min-width: 0;
  padding: 1rem;
  border: 1px solid rgba(16, 36, 29, 0.12);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.78);
}

.auth-card h2,
.my-library-panel h2 {
  margin: 0;
  font-family: "Source Serif 4", Georgia, serif;
  font-size: 1.7rem;
}

.auth-card p,
.my-library-panel p {
  margin: 0;
  font-size: 0.88rem;
}

.auth-card label {
  display: grid;
  gap: 0.34rem;
  color: var(--ink);
  font-size: 0.82rem;
  font-weight: 700;
}

.auth-card input {
  width: 100%;
  min-height: 2.75rem;
  border: 1px solid rgba(16, 36, 29, 0.18);
  border-radius: 12px;
  padding: 0 0.78rem;
  color: var(--ink);
  background: rgba(246, 249, 244, 0.92);
  font: inherit;
}

.auth-card small {
  color: var(--muted);
  line-height: 1.5;
}

.joined-courses {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem;
}

.joined-course {
  display: grid;
  grid-template-columns: 5.2rem 1fr;
  gap: 0.7rem;
  align-items: center;
  min-width: 0;
  padding: 0.65rem;
  border: 1px solid rgba(16, 36, 29, 0.12);
  border-radius: 14px;
  background: rgba(246, 249, 244, 0.72);
}

.joined-course img {
  width: 100%;
  aspect-ratio: 16 / 10;
  border-radius: 10px;
  object-fit: cover;
}

.joined-course span {
  color: var(--green);
  font-family: "JetBrains Mono", "Courier New", monospace;
  font-size: 0.68rem;
  font-weight: 800;
  text-transform: uppercase;
}

.joined-course strong {
  display: block;
  margin-top: 0.18rem;
  color: var(--ink);
  font-size: 0.86rem;
  line-height: 1.25;
}

.course-studio {
  display: grid;
  grid-template-columns: minmax(18rem, 0.72fr) minmax(24rem, 1.28fr);
  gap: 1.4rem;
  align-items: start;
  width: min(1180px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 2.2rem 0 2rem;
}

.course-stage,
.course-command {
  position: relative;
  min-width: 0;
  overflow: hidden;
  border: 1px solid rgba(16, 36, 29, 0.14);
  border-radius: 26px;
  background: rgba(255, 255, 255, 0.76);
  box-shadow: 0 1.7rem 4.6rem rgba(16, 36, 29, 0.13);
}

.course-stage {
  min-height: 0;
  aspect-ratio: 16 / 10;
  background: #07130f;
}

.course-stage-cover {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  min-height: 0;
  object-fit: cover;
  object-position: center;
  opacity: 0.94;
}

.stage-badge {
  position: absolute;
  top: 0.72rem;
  left: 0.72rem;
  padding: 0.38rem 0.58rem;
  border: 1px solid rgba(255, 255, 255, 0.36);
  border-radius: 999px;
  color: white;
  background: rgba(7, 19, 15, 0.56);
  backdrop-filter: blur(12px);
  font-family: "JetBrains Mono", "Courier New", monospace;
  font-size: 0.64rem;
  font-weight: 800;
}

.stage-console {
  position: absolute;
  right: 0.72rem;
  bottom: 0.72rem;
  left: 0.72rem;
  display: grid;
  gap: 0.45rem;
  padding: 0.72rem;
  border: 1px solid rgba(255, 255, 255, 0.24);
  border-radius: 18px;
  color: white;
  background: rgba(7, 19, 15, 0.72);
  backdrop-filter: blur(16px);
}

.stage-console span {
  color: var(--course-accent);
  font-family: "JetBrains Mono", "Courier New", monospace;
  font-size: 0.66rem;
  font-weight: 800;
}

.stage-console strong {
  font-size: 0.98rem;
  line-height: 1.22;
}

.stage-console p {
  margin: 0;
  color: rgba(255, 255, 255, 0.76);
  font-size: 0.78rem;
  line-height: 1.55;
}

.course-command {
  display: grid;
  align-content: start;
  gap: 1rem;
  padding: clamp(1rem, 2vw, 1.35rem);
}

.course-command h1 {
  margin-bottom: 0;
  font-size: clamp(2.2rem, 5vw, 4rem);
  line-height: 0.98;
}

.course-command > p:not(.eyebrow):not(.course-content-title) {
  margin: 0;
  font-size: 0.98rem;
}

.course-promise-grid,
.course-content-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.6rem;
}

.course-promise-grid article,
.course-content-strip article {
  min-width: 0;
  padding: 0.75rem;
  border: 1px solid rgba(16, 36, 29, 0.12);
  border-radius: 14px;
  background: rgba(246, 249, 244, 0.68);
}

.course-promise-grid span {
  display: block;
  margin-bottom: 0.28rem;
  color: var(--course-accent);
  font-family: "JetBrains Mono", "Courier New", monospace;
  font-size: 0.7rem;
  font-weight: 900;
}

.course-promise-grid strong,
.course-content-strip strong {
  color: var(--ink);
  font-size: 0.88rem;
  line-height: 1.2;
}

.course-content-title {
  margin: 0.3rem 0 -0.3rem;
  color: var(--ink);
  font-family: "JetBrains Mono", "Courier New", monospace;
  font-size: 0.78rem;
  font-weight: 900;
  text-transform: uppercase;
}

.course-content-strip strong {
  display: block;
  color: var(--course-accent-2);
  font-size: 1.25rem;
}

.course-content-strip span {
  color: var(--muted);
  font-size: 0.72rem;
  line-height: 1.35;
}

.course-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
}

.button.is-joined {
  border-color: var(--ink);
  background: var(--ink);
}

.course-progress-card {
  display: grid;
  gap: 0.55rem;
  padding: 0.9rem;
  border: 1px solid rgba(16, 36, 29, 0.12);
  border-radius: 16px;
  background:
    linear-gradient(135deg, color-mix(in srgb, var(--course-accent) 12%, transparent), transparent),
    rgba(255, 255, 255, 0.74);
}

.course-progress-card div {
  display: flex;
  justify-content: space-between;
  gap: 0.8rem;
}

.course-progress-card span {
  color: var(--green);
  font-family: "JetBrains Mono", "Courier New", monospace;
  font-size: 0.72rem;
  font-weight: 900;
  text-transform: uppercase;
}

.course-progress-card strong {
  color: var(--ink);
  font-size: 0.86rem;
}

.course-progress-card progress {
  width: 100%;
  height: 0.72rem;
  overflow: hidden;
  border: 0;
  border-radius: 999px;
  background: rgba(16, 36, 29, 0.1);
}

.course-progress-card progress::-webkit-progress-bar {
  background: rgba(16, 36, 29, 0.1);
}

.course-progress-card progress::-webkit-progress-value {
  border-radius: 999px;
  background: linear-gradient(90deg, var(--course-accent), var(--course-accent-2));
}

.course-progress-card p {
  margin: 0;
  font-size: 0.82rem;
  line-height: 1.45;
}

.learning-lab {
  padding-top: 3rem;
  padding-bottom: 3rem;
}

.learning-console {
  display: grid;
  grid-template-columns: 1.1fr 0.95fr 0.85fr;
  gap: 1rem;
}

.bt-focus-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.9rem;
}

.bt-focus-grid article {
  display: grid;
  gap: 0.55rem;
  padding: 1rem;
  border: 1px solid rgba(16, 36, 29, 0.1);
  border-radius: 22px;
  background:
    radial-gradient(circle at 82% 0, rgba(35, 197, 142, 0.16), transparent 10rem),
    rgba(255, 255, 255, 0.84);
  box-shadow: 0 1rem 2.2rem rgba(16, 36, 29, 0.08);
}

.bt-focus-grid span {
  display: grid;
  place-items: center;
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  color: #071611;
  background: #23c58e;
  font-family: "JetBrains Mono", "Courier New", monospace;
  font-size: 0.72rem;
  font-weight: 900;
}

.bt-focus-grid strong {
  font-size: 1.1rem;
}

.bt-focus-grid p {
  margin: 0;
  color: var(--muted);
  line-height: 1.45;
}

.video-simulator,
.animation-simulator,
.mission-simulator,
.lesson-card,
.punchy-outcomes article {
  min-width: 0;
  border: 1px solid rgba(16, 36, 29, 0.14);
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.82);
  box-shadow: 0 1.35rem 3.6rem rgba(16, 36, 29, 0.11);
}

.video-simulator,
.animation-simulator,
.mission-simulator {
  display: grid;
  align-content: start;
  gap: 0.8rem;
  padding: 1rem;
}

.video-simulator h3,
.animation-simulator h3,
.mission-simulator h3 {
  margin: 0;
  font-size: 1.25rem;
}

.video-frame,
.flow-board {
  position: relative;
  overflow: hidden;
  min-height: 12rem;
  border-radius: 18px;
  background:
    linear-gradient(135deg, rgba(7, 19, 15, 0.86), rgba(16, 36, 29, 0.68)),
    #07130f;
}

.video-frame b {
  position: absolute;
  inset: 38% auto auto 42%;
  width: 4rem;
  height: 4rem;
  border-radius: 50%;
  background: var(--course-accent);
  box-shadow: 0 0 0 1rem rgba(255, 255, 255, 0.08);
  animation: cyberPulse 1.9s ease-in-out infinite;
}

.video-frame b::after {
  content: "";
  position: absolute;
  left: 1.55rem;
  top: 1.2rem;
  border-top: 0.78rem solid transparent;
  border-bottom: 0.78rem solid transparent;
  border-left: 1.1rem solid white;
}

.video-frame i,
.flow-board i {
  position: absolute;
  display: block;
  height: 0.55rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.2);
}

.video-frame i:nth-of-type(1) { right: 1rem; bottom: 1rem; left: 1rem; }
.video-frame i:nth-of-type(2) { top: 1.1rem; left: 1rem; width: 48%; }
.video-frame i:nth-of-type(3) { top: 2.2rem; left: 1rem; width: 32%; }
.video-frame em {
  position: absolute;
  right: 1rem;
  bottom: 1rem;
  left: 1rem;
  width: 42%;
  height: 0.55rem;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--course-accent), var(--course-accent-2));
  animation: timeline 4s ease-in-out infinite;
}

.flow-board i {
  width: 3rem;
  height: 3rem;
  border: 0.35rem solid rgba(255, 255, 255, 0.78);
  border-radius: 50%;
  background: var(--course-accent);
  animation: cyberPulse 2.2s ease-in-out infinite;
}

.flow-board i:nth-child(1) { left: 10%; top: 38%; }
.flow-board i:nth-child(2) { left: 38%; top: 18%; animation-delay: 0.2s; }
.flow-board i:nth-child(3) { right: 28%; top: 48%; animation-delay: 0.4s; }
.flow-board i:nth-child(4) { right: 10%; top: 25%; animation-delay: 0.6s; }
.flow-board b {
  position: absolute;
  inset: 50% 9% auto 9%;
  height: 0.35rem;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--course-accent), white, var(--course-accent-2));
  animation: timeline 2.8s ease-in-out infinite;
}

.mission-simulator code {
  display: block;
  padding: 0.85rem;
  border-radius: 14px;
  color: #d9fff2;
  background: #07130f;
  font-family: "JetBrains Mono", "Courier New", monospace;
  font-size: 0.78rem;
  line-height: 1.55;
}

.lesson-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.lesson-card {
  display: grid;
  overflow: hidden;
  transition:
    transform 170ms ease,
    border-color 170ms ease,
    opacity 170ms ease;
}

.lesson-card:hover {
  transform: translateY(-3px);
}

.lesson-card.is-current {
  border-color: color-mix(in srgb, var(--course-accent) 58%, rgba(16, 36, 29, 0.14));
}

.lesson-card.is-locked {
  opacity: 0.58;
}

.lesson-preview-button {
  display: grid;
  gap: 0.52rem;
  width: 100%;
  border: 0;
  padding: 0.86rem;
  color: inherit;
  background: transparent;
  text-align: left;
  cursor: pointer;
}

.lesson-number,
.lesson-lock,
.lesson-meta {
  font-family: "JetBrains Mono", "Courier New", monospace;
  font-weight: 900;
}

.lesson-number {
  display: grid;
  place-items: center;
  width: 2.45rem;
  height: 2.45rem;
  border-radius: 50%;
  color: white;
  background: var(--ink);
  font-size: 0.76rem;
}

.lesson-lock {
  justify-self: end;
  margin-top: -2.45rem;
  padding: 0.32rem 0.48rem;
  border: 1px solid rgba(16, 36, 29, 0.12);
  border-radius: 999px;
  color: var(--ink);
  background: rgba(246, 249, 244, 0.82);
  font-size: 0.66rem;
  text-transform: uppercase;
}

.lesson-card.is-current .lesson-lock {
  color: white;
  background: var(--course-accent);
}

.lesson-card.is-complete .lesson-lock {
  color: white;
  background: var(--green);
}

.mini-cinema {
  position: relative;
  overflow: hidden;
  min-height: 7.4rem;
  border-radius: 16px;
  background:
    radial-gradient(circle at 70% 30%, color-mix(in srgb, var(--course-accent) 64%, white), transparent 22%),
    linear-gradient(135deg, #07130f, color-mix(in srgb, var(--course-accent-2) 38%, #07130f));
}

.mini-cinema i {
  position: absolute;
  width: 2.2rem;
  height: 2.2rem;
  border-radius: 50%;
  background: white;
  opacity: 0.88;
  animation: cyberFloat 3.8s ease-in-out infinite;
}

.mini-cinema i:nth-child(1) { left: 14%; top: 28%; }
.mini-cinema i:nth-child(2) { left: 44%; top: 52%; animation-delay: 0.3s; }
.mini-cinema i:nth-child(3) { right: 16%; top: 24%; animation-delay: 0.6s; }
.mini-cinema b {
  position: absolute;
  right: 12%;
  bottom: 18%;
  left: 12%;
  height: 0.38rem;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--course-accent), white, var(--course-accent-2));
  animation: timeline 2.8s ease-in-out infinite;
}

.lesson-meta {
  color: var(--course-accent-2);
  font-size: 0.72rem;
  text-transform: uppercase;
}

.lesson-preview-button strong {
  min-height: 2.7rem;
  color: var(--ink);
  font-size: 1rem;
  line-height: 1.28;
}

.lesson-preview-button small {
  display: -webkit-box;
  overflow: hidden;
  color: var(--muted);
  font-size: 0.8rem;
  line-height: 1.45;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 3;
}

.lesson-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.34rem;
}

.lesson-tags em {
  padding: 0.3rem 0.45rem;
  border-radius: 999px;
  color: var(--ink);
  background: rgba(16, 36, 29, 0.06);
  font-size: 0.68rem;
  font-style: normal;
  font-weight: 800;
}

.lesson-details {
  border-top: 1px solid rgba(16, 36, 29, 0.1);
}

.lesson-details summary {
  padding: 0.72rem 0.86rem;
  color: var(--ink);
  font-family: "JetBrains Mono", "Courier New", monospace;
  font-size: 0.76rem;
  font-weight: 900;
  cursor: pointer;
}

.detail-grid {
  display: grid;
  gap: 0.65rem;
  padding: 0 0.86rem 0.86rem;
}

.detail-grid section {
  padding: 0.78rem;
  border: 1px solid rgba(16, 36, 29, 0.1);
  border-radius: 14px;
  background: rgba(246, 249, 244, 0.7);
}

.detail-grid h4 {
  margin: 0 0 0.48rem;
  color: var(--ink);
  font-family: "JetBrains Mono", "Courier New", monospace;
  font-size: 0.74rem;
  font-weight: 900;
  text-transform: uppercase;
}

.detail-grid ol,
.detail-grid ul {
  display: grid;
  gap: 0.36rem;
  margin: 0;
  padding-left: 1rem;
}

.detail-grid li {
  color: var(--ink-2);
  font-size: 0.78rem;
  line-height: 1.45;
}

.lesson-actions {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.55rem;
  margin: 0.78rem 0.86rem 0.86rem;
}

.open-lesson,
.solve-test,
.complete-lesson {
  min-height: 2.55rem;
  border: 1px solid var(--ink);
  border-radius: 12px;
  font-family: "JetBrains Mono", "Courier New", monospace;
  font-size: 0.74rem;
  font-weight: 900;
}

.open-lesson {
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  background:
    radial-gradient(circle at 20% 10%, rgba(255, 255, 255, 0.24), transparent 34%),
    var(--green);
  box-shadow: 0 0.85rem 1.7rem rgba(15, 143, 104, 0.22);
}

.solve-test {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.65rem;
  padding: 0 0.75rem;
  color: var(--ink);
  background:
    linear-gradient(135deg, color-mix(in srgb, var(--course-accent) 13%, white), rgba(255, 255, 255, 0.88));
}

.solve-test span {
  padding: 0.25rem 0.42rem;
  border-radius: 999px;
  color: white;
  background: var(--ink);
  font-size: 0.66rem;
}

.solve-test.is-solved {
  border-color: var(--green);
}

.solve-test.is-solved span {
  background: var(--green);
}

.complete-lesson {
  color: white;
  background: var(--ink);
  cursor: pointer;
}

.complete-lesson:disabled {
  border-color: rgba(16, 36, 29, 0.12);
  color: var(--muted);
  background: rgba(16, 36, 29, 0.06);
  cursor: not-allowed;
}

.quiz-average {
  padding-top: 0.55rem;
  border-top: 1px solid rgba(16, 36, 29, 0.1);
  color: var(--ink-2);
  font-weight: 700;
}

.quiz-average.is-complete {
  color: var(--green);
}

.quiz-page {
  min-height: calc(100vh - 8rem);
}

.quiz-shell {
  display: grid;
  grid-template-columns: minmax(18rem, 0.42fr) minmax(0, 1fr);
  gap: 1rem;
  align-items: start;
  padding-top: 3rem;
}

.quiz-hero-card,
.quiz-form {
  min-width: 0;
  border: 1px solid rgba(16, 36, 29, 0.14);
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.84);
  box-shadow: 0 1.5rem 4rem rgba(16, 36, 29, 0.12);
}

.quiz-hero-card {
  position: sticky;
  top: 5.4rem;
  display: grid;
  gap: 1rem;
  padding: 1.15rem;
}

.quiz-hero-card h1 {
  margin-bottom: 0;
  font-size: clamp(2rem, 4vw, 3.35rem);
}

.quiz-hero-card p {
  margin: 0;
}

.quiz-score-board {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.55rem;
}

.quiz-score-board article {
  display: grid;
  gap: 0.25rem;
  padding: 0.75rem;
  border: 1px solid rgba(16, 36, 29, 0.12);
  border-radius: 14px;
  background: rgba(246, 249, 244, 0.72);
}

.quiz-score-board strong {
  color: var(--ink);
  font-size: 1.18rem;
}

.quiz-score-board span {
  color: var(--muted);
  font-family: "JetBrains Mono", "Courier New", monospace;
  font-size: 0.68rem;
  font-weight: 900;
  text-transform: uppercase;
}

.quiz-form {
  display: grid;
  gap: 0.85rem;
  padding: 1rem;
}

.quiz-course-link {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.7rem;
  padding: 0.75rem;
  border: 1px solid rgba(16, 36, 29, 0.1);
  border-radius: 16px;
  background:
    linear-gradient(135deg, rgba(15, 143, 104, 0.08), transparent),
    rgba(246, 249, 244, 0.7);
}

.quiz-course-link strong {
  color: var(--ink);
  font-size: 0.9rem;
  line-height: 1.35;
}

.quiz-question {
  display: grid;
  gap: 0.75rem;
  margin: 0;
  padding: 1rem;
  border: 1px solid rgba(16, 36, 29, 0.12);
  border-radius: 18px;
  background: rgba(246, 249, 244, 0.64);
}

.quiz-question.is-missing {
  border-color: rgba(239, 68, 68, 0.7);
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

.quiz-question legend {
  display: flex;
  gap: 0.65rem;
  align-items: flex-start;
  color: var(--ink);
  font-weight: 850;
  line-height: 1.35;
}

.quiz-question legend span {
  display: grid;
  flex: 0 0 auto;
  place-items: center;
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  color: white;
  background: var(--ink);
  font-family: "JetBrains Mono", "Courier New", monospace;
  font-size: 0.72rem;
}

.quiz-options {
  display: grid;
  gap: 0.5rem;
}

.quiz-option {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 0.65rem;
  align-items: center;
  min-height: 3.15rem;
  padding: 0.7rem;
  border: 1px solid rgba(16, 36, 29, 0.12);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.74);
  cursor: pointer;
}

.quiz-option input {
  width: 1.05rem;
  height: 1.05rem;
  accent-color: var(--green);
}

.quiz-option span {
  color: var(--ink-2);
  font-size: 0.9rem;
  line-height: 1.42;
}

.quiz-option em {
  justify-self: end;
  padding: 0.28rem 0.42rem;
  border-radius: 999px;
  color: white;
  font-family: "JetBrains Mono", "Courier New", monospace;
  font-size: 0.62rem;
  font-style: normal;
  font-weight: 900;
  text-transform: uppercase;
}

.quiz-option.is-correct {
  border-color: rgba(22, 163, 74, 0.72);
  background: rgba(22, 163, 74, 0.1);
}

.quiz-option.is-correct em {
  background: #15803d;
}

.quiz-option.is-wrong {
  border-color: rgba(220, 38, 38, 0.74);
  background: rgba(220, 38, 38, 0.1);
}

.quiz-option.is-wrong em {
  background: #b91c1c;
}

.quiz-option.is-muted {
  opacity: 0.76;
}

.quiz-explanation {
  margin: 0;
  padding: 0.7rem;
  border-radius: 12px;
  color: var(--ink);
  background: rgba(255, 255, 255, 0.62);
  font-size: 0.86rem;
  line-height: 1.55;
}

.quiz-warning,
.quiz-locked {
  margin: 0;
  padding: 0.9rem;
  border-radius: 16px;
  color: var(--ink);
  background: rgba(245, 158, 11, 0.14);
  font-weight: 800;
}

.quiz-locked {
  background: rgba(15, 143, 104, 0.12);
}

.quiz-submit {
  width: 100%;
}

.quiz-page {
  background:
    radial-gradient(circle at 18% 12%, rgba(35, 197, 142, 0.18), transparent 22rem),
    radial-gradient(circle at 86% 10%, rgba(245, 158, 11, 0.14), transparent 22rem),
    linear-gradient(rgba(16, 36, 29, 0.042) 1px, transparent 1px),
    linear-gradient(90deg, rgba(16, 36, 29, 0.035) 1px, transparent 1px),
    #f7faf4;
  background-size: auto, auto, 36px 36px, 36px 36px, auto;
}

.quiz-shell {
  grid-template-columns: minmax(17rem, 0.34fr) minmax(0, 1fr);
  max-width: 1120px;
  gap: 1.1rem;
}

.quiz-hero-card.quiz-command-card {
  overflow: hidden;
  border-color: rgba(16, 36, 29, 0.18);
  background:
    radial-gradient(circle at 90% 8%, rgba(35, 197, 142, 0.22), transparent 11rem),
    linear-gradient(145deg, rgba(255, 255, 255, 0.95), rgba(246, 249, 244, 0.82));
}

.quiz-command-card::before {
  content: "";
  position: absolute;
  inset: auto -2rem -2.4rem auto;
  width: 9rem;
  height: 9rem;
  border: 1px dashed rgba(15, 143, 104, 0.36);
  border-radius: 50%;
  animation: playerOrbit 18s linear infinite;
}

.quiz-level-card {
  display: grid;
  gap: 0.35rem;
  padding: 0.85rem;
  border: 1px solid rgba(16, 36, 29, 0.12);
  border-radius: 18px;
  background:
    linear-gradient(135deg, rgba(16, 36, 29, 0.94), rgba(24, 50, 41, 0.9));
  color: white;
}

.quiz-level-card span,
.quiz-level-card small,
.quiz-question legend small,
.quiz-course-link span {
  font-family: "JetBrains Mono", "Courier New", monospace;
  font-size: 0.67rem;
  font-weight: 900;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.quiz-level-card span {
  color: #23c58e;
}

.quiz-level-card strong {
  font-size: 1.12rem;
}

.quiz-level-card small {
  color: rgba(255, 255, 255, 0.66);
  line-height: 1.45;
  text-transform: none;
}

.quiz-hero-card h1 {
  font-size: clamp(1.85rem, 3vw, 2.55rem);
  line-height: 1.02;
}

.quiz-hero-card p {
  color: #55655d;
  font-size: 0.92rem;
  line-height: 1.6;
}

.quiz-progress-rail {
  height: 0.55rem;
  overflow: hidden;
  border-radius: 999px;
  background: rgba(16, 36, 29, 0.09);
}

.quiz-progress-rail b {
  display: block;
  width: 0;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, #23c58e, #f59e0b);
  transition: width 220ms ease;
}

.quiz-score-board article {
  background: rgba(255, 255, 255, 0.74);
}

.quiz-form {
  gap: 0.72rem;
  padding: 0.85rem;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.92), rgba(247, 250, 244, 0.84));
}

.quiz-course-link {
  position: sticky;
  top: 5rem;
  z-index: 5;
  border-color: rgba(15, 143, 104, 0.22);
  background:
    linear-gradient(135deg, rgba(15, 143, 104, 0.1), rgba(255, 255, 255, 0.92));
  backdrop-filter: blur(12px);
}

.quiz-course-link span {
  flex-basis: 100%;
  color: var(--green);
}

.quiz-question {
  position: relative;
  gap: 0.7rem;
  padding: 0.86rem;
  border-color: rgba(16, 36, 29, 0.12);
  background:
    radial-gradient(circle at 100% 0, rgba(35, 197, 142, 0.08), transparent 13rem),
    rgba(255, 255, 255, 0.78);
  box-shadow: 0 0.65rem 1.9rem rgba(16, 36, 29, 0.06);
}

.quiz-question.level-2 {
  border-color: rgba(14, 165, 233, 0.22);
}

.quiz-question.level-3,
.quiz-question.level-4 {
  border-color: rgba(245, 158, 11, 0.28);
}

.quiz-question legend {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  width: 100%;
  gap: 0.72rem;
}

.quiz-question legend .quiz-number {
  width: 2.1rem;
  height: 2.1rem;
  margin-top: 0.1rem;
  color: #071611;
  background: #23c58e;
}

.quiz-question legend div {
  display: grid;
  gap: 0.22rem;
  min-width: 0;
}

.quiz-question legend small {
  color: var(--green);
}

.quiz-question legend strong {
  color: var(--ink);
  font-size: 1rem;
  line-height: 1.28;
}

.quiz-question legend em {
  color: #647269;
  font-size: 0.86rem;
  font-style: normal;
  font-weight: 500;
  line-height: 1.45;
}

.quiz-options {
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 0.48rem;
}

.quiz-option {
  grid-template-columns: auto auto minmax(0, 1fr);
  gap: 0.48rem;
  min-height: 3rem;
  padding: 0.62rem;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.86);
  transition:
    transform 150ms ease,
    border-color 150ms ease,
    background 150ms ease,
    box-shadow 150ms ease;
}

.quiz-option:hover {
  transform: translateY(-2px);
  border-color: rgba(15, 143, 104, 0.35);
  box-shadow: 0 0.7rem 1.4rem rgba(16, 36, 29, 0.08);
}

.quiz-option:has(input:checked) {
  border-color: rgba(15, 143, 104, 0.72);
  background: rgba(35, 197, 142, 0.12);
}

.quiz-option b {
  display: grid;
  place-items: center;
  width: 1.35rem;
  height: 1.35rem;
  border-radius: 50%;
  color: var(--ink);
  background: rgba(16, 36, 29, 0.08);
  font-family: "JetBrains Mono", "Courier New", monospace;
  font-size: 0.68rem;
  font-weight: 900;
}

.quiz-option:has(input:checked) b,
.quiz-option.is-correct b {
  color: #071611;
  background: #23c58e;
}

.quiz-option.is-wrong b {
  color: white;
  background: #b91c1c;
}

.quiz-option span {
  color: var(--ink);
  font-size: 0.84rem;
  font-weight: 700;
  line-height: 1.28;
}

.quiz-option em {
  grid-column: 1 / -1;
  justify-self: start;
}

.quiz-explanation {
  border: 1px solid rgba(15, 143, 104, 0.13);
  background: rgba(15, 143, 104, 0.07);
}

.quiz-warning,
.quiz-locked {
  border: 1px solid rgba(245, 158, 11, 0.22);
  background:
    linear-gradient(135deg, rgba(245, 158, 11, 0.14), rgba(255, 255, 255, 0.78));
}

.quiz-locked {
  border-color: rgba(15, 143, 104, 0.25);
  background:
    linear-gradient(135deg, rgba(35, 197, 142, 0.14), rgba(255, 255, 255, 0.78));
}

.punchy-outcomes span {
  display: block;
  margin-bottom: 0.5rem;
}

@keyframes cyberPulse {
  0%, 100% { transform: scale(1); opacity: 0.78; }
  50% { transform: scale(1.08); opacity: 1; }
}

@keyframes cyberFloat {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

@keyframes timeline {
  0%, 100% { width: 22%; opacity: 0.7; }
  50% { width: 76%; opacity: 1; }
}

@media (max-width: 1040px) {
  .course-studio,
  .user-shelf-card {
    grid-template-columns: 1fr;
  }

  .course-stage {
    width: min(100%, 30rem);
    aspect-ratio: 16 / 9;
    justify-self: center;
  }

  .learning-console,
  .bt-focus-grid,
  .lesson-grid,
  .quiz-shell,
  .collection-page .collection-strip,
  .collection-page .wrap-strip {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .quiz-shell {
    grid-template-columns: 1fr;
  }

  .quiz-hero-card {
    position: static;
  }
}

@media (max-width: 700px) {
  .course-studio,
  .section,
  .collection-page .section {
    width: min(100% - 1rem, 1180px);
  }

  .course-stage,
  .course-stage-cover {
    min-height: 0;
  }

  .course-promise-grid,
  .course-content-strip,
  .learning-console,
  .bt-focus-grid,
  .lesson-grid,
  .quiz-score-board,
  .joined-courses,
  .collection-page .collection-strip,
  .collection-page .wrap-strip {
    display: grid;
    grid-template-columns: 1fr;
  }

  .collection-page .compact-course-card {
    flex: initial;
  }

  .course-command h1 {
    font-size: 2.15rem;
  }

  .stage-console {
    position: relative;
    right: auto;
    bottom: auto;
    left: auto;
    margin: -5.2rem 0.6rem 0.6rem;
  }

  .course-stage-cover {
    object-fit: cover;
  }

  .quiz-shell {
    padding-top: 1.5rem;
  }

  .quiz-form,
  .quiz-hero-card {
    padding: 0.8rem;
  }

  .quiz-option {
    grid-template-columns: auto 1fr;
  }

  .quiz-option em {
    grid-column: 2;
    justify-self: start;
  }
}

/* Keep content visible even before reveal observers fire in narrow embedded browsers. */
[data-reveal] {
  opacity: 1;
  transform: none;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
}

.home-page {
  background:
    radial-gradient(circle at 18% 0%, rgba(15, 143, 104, 0.12), transparent 26rem),
    radial-gradient(circle at 82% 8%, rgba(245, 158, 11, 0.1), transparent 30rem),
    linear-gradient(rgba(16, 36, 29, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(16, 36, 29, 0.035) 1px, transparent 1px),
    #f7faf5;
  background-size: auto, auto, 36px 36px, 36px 36px, auto;
}

.home-topbar {
  position: sticky;
  top: 0;
  z-index: 30;
  display: grid;
  grid-template-columns: auto auto minmax(16rem, 1fr) auto;
  gap: 1rem;
  align-items: center;
  min-height: 4.2rem;
  padding: 0.55rem 1.55rem;
  border-bottom: 1px solid rgba(16, 36, 29, 0.12);
  background: rgba(255, 255, 255, 0.9);
  box-shadow: 0 0.7rem 2rem rgba(16, 36, 29, 0.08);
  backdrop-filter: blur(16px);
}

.home-brand {
  font-size: 0.9rem;
}

.home-discover,
.home-actions a {
  color: var(--ink-2);
  font-size: 0.86rem;
  font-weight: 700;
}

.home-search {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.65rem;
  align-items: center;
  min-height: 3rem;
  padding: 0 1rem;
  border: 1px solid rgba(17, 24, 39, 0.38);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.86);
}

.home-search span {
  color: var(--muted);
  font-size: 1.2rem;
}

.home-search input {
  width: 100%;
  border: 0;
  outline: 0;
  color: var(--ink);
  background: transparent;
  font: inherit;
}

.home-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
  white-space: nowrap;
}

.home-bell,
.home-avatar {
  display: grid;
  place-items: center;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 50%;
}

.home-bell {
  border: 1px solid rgba(16, 36, 29, 0.16);
  color: var(--green);
  background: rgba(246, 249, 244, 0.86);
  font-family: "JetBrains Mono", "Courier New", monospace;
}

.home-avatar,
.home-profile-avatar {
  color: white;
  background:
    radial-gradient(circle at 72% 12%, #23c58e 0 0.28rem, transparent 0.3rem),
    #111827;
  font-family: "JetBrains Mono", "Courier New", monospace;
  font-weight: 900;
}

.home-welcome {
  border-bottom: 1px solid rgba(16, 36, 29, 0.08);
  background: linear-gradient(90deg, rgba(255, 255, 255, 0.78), rgba(238, 245, 239, 0.72));
}

.home-welcome-inner {
  width: min(1180px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 2rem 0;
}

.home-profile {
  display: flex;
  align-items: center;
  gap: 1.2rem;
}

.home-profile-avatar {
  display: grid;
  flex: 0 0 auto;
  place-items: center;
  width: 4.2rem;
  height: 4.2rem;
  border-radius: 50%;
  font-size: 1.35rem;
}

.home-profile h1 {
  margin: 0 0 0.35rem;
  font-family: "Sora", "Segoe UI", sans-serif;
  font-size: clamp(1.6rem, 3vw, 2.15rem);
  line-height: 1.15;
}

.home-profile p {
  margin: 0;
  color: #263a33;
  font-size: 0.95rem;
}

.home-profile a {
  margin-left: 0.8rem;
  color: #0f8f68;
  font-weight: 900;
  text-decoration: underline;
  text-underline-offset: 0.2em;
}

.home-journey {
  padding-top: 3rem;
  padding-bottom: 2rem;
}

.journey-card {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(10rem, 0.38fr) 8.5rem minmax(14rem, 0.46fr);
  gap: 1.25rem;
  align-items: center;
  padding: 1.55rem;
  border: 1px solid rgba(17, 24, 39, 0.16);
  border-radius: 22px;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.9), rgba(246, 249, 244, 0.78)),
    rgba(255, 255, 255, 0.88);
  box-shadow: 0 1.4rem 4rem rgba(16, 36, 29, 0.1);
}

.journey-copy h2 {
  margin-bottom: 0.6rem;
  font-family: "Sora", "Segoe UI", sans-serif;
  font-size: clamp(1.45rem, 3vw, 2rem);
  line-height: 1.2;
}

.journey-copy p {
  margin-bottom: 1rem;
  max-width: 42rem;
  color: #263a33;
  font-size: 0.95rem;
  line-height: 1.6;
}

.journey-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
}

.journey-streak {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  min-width: 0;
}

.streak-icon {
  display: grid;
  place-items: center;
  width: 2.65rem;
  height: 2.65rem;
  border-radius: 50%;
  color: #778097;
  background: rgba(17, 24, 39, 0.08);
  font-size: 1.45rem;
}

.journey-streak strong {
  display: block;
  color: var(--ink);
  font-size: 1.25rem;
}

.journey-streak small,
.journey-ring span {
  color: #7b849a;
  font-size: 0.82rem;
}

.journey-ring {
  display: grid;
  place-items: center;
  justify-self: center;
  width: 5.4rem;
  height: 5.4rem;
  border-radius: 50%;
  background:
    radial-gradient(circle, #fff 0 46%, transparent 47%),
    conic-gradient(#0f8f68 var(--home-progress), rgba(17, 24, 39, 0.14) 0);
  box-shadow: inset 0 0 0 0.55rem rgba(17, 24, 39, 0.08);
}

.journey-ring strong {
  margin-top: 0.7rem;
  color: var(--ink);
  font-size: 1.1rem;
}

.journey-ring span {
  margin-top: -1.2rem;
  font-size: 0.62rem;
  font-weight: 800;
  text-transform: uppercase;
}

.journey-metrics {
  display: grid;
  gap: 0.42rem;
}

.journey-metrics p {
  display: flex;
  gap: 0.5rem;
  align-items: center;
  margin: 0;
  color: #2a3347;
  font-size: 0.9rem;
  line-height: 1.45;
}

.journey-metrics i {
  width: 0.55rem;
  height: 0.55rem;
  border-radius: 50%;
  background: #f59e0b;
}

.journey-metrics p:nth-child(2) i {
  background: #0f8f68;
}

.home-shortcuts {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) repeat(2, minmax(0, 0.85fr));
  gap: 1rem;
  padding-top: 2rem;
}

.shortcut-card {
  display: grid;
  align-content: start;
  min-height: 15rem;
  padding: 1.2rem;
  border: 1px solid rgba(16, 36, 29, 0.13);
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.78);
  box-shadow: 0 1.2rem 3.2rem rgba(16, 36, 29, 0.1);
  transition:
    transform 170ms ease,
    border-color 170ms ease;
}

.shortcut-card:hover,
.shortcut-card:focus-visible {
  border-color: rgba(15, 143, 104, 0.45);
  transform: translateY(-4px);
}

.shortcut-card.featured {
  min-height: 18rem;
  background:
    linear-gradient(135deg, rgba(15, 143, 104, 0.12), rgba(255, 255, 255, 0.84) 52%),
    rgba(255, 255, 255, 0.82);
}

.shortcut-card span {
  margin-bottom: 0.7rem;
  color: var(--green);
  font-family: "JetBrains Mono", "Courier New", monospace;
  font-size: 0.74rem;
  font-weight: 900;
  text-transform: uppercase;
}

.shortcut-card h2 {
  margin-bottom: 0.75rem;
  font-size: clamp(2rem, 4vw, 3.1rem);
}

.shortcut-card h3 {
  font-size: 1.25rem;
}

.home-proof {
  margin-top: 2rem;
}

@media (max-width: 1100px) {
  .home-topbar {
    grid-template-columns: 1fr auto;
  }

  .home-search {
    grid-column: 1 / -1;
    order: 3;
  }

  .home-discover {
    display: none;
  }

  .journey-card {
    grid-template-columns: 1fr 1fr;
  }

  .home-shortcuts {
    grid-template-columns: 1fr 1fr;
  }

  .shortcut-card.featured {
    grid-column: 1 / -1;
  }
}

@media (max-width: 700px) {
  .home-topbar {
    grid-template-columns: 1fr;
    align-items: stretch;
    padding: 0.8rem 1rem;
  }

  .home-actions {
    overflow-x: auto;
    padding-bottom: 0.1rem;
  }

  .home-welcome-inner {
    width: min(100% - 1rem, 1180px);
    padding: 1.4rem 0;
  }

  .home-profile {
    align-items: flex-start;
  }

  .home-profile-avatar {
    width: 3.35rem;
    height: 3.35rem;
    font-size: 1rem;
  }

  .home-profile a {
    display: block;
    margin: 0.35rem 0 0;
  }

  .journey-card,
  .home-shortcuts {
    grid-template-columns: 1fr;
  }

  .journey-card {
    padding: 1rem;
  }

  .journey-ring {
    justify-self: start;
  }
}

/* Lesson player */
.lesson-player-page {
  background:
    radial-gradient(circle at 16% 8%, rgba(35, 197, 142, 0.18), transparent 32rem),
    linear-gradient(90deg, #10141f 0, #10141f 74%, #f4f7f1 74%, #f4f7f1 100%);
  color: #10141f;
}

.lesson-player-topbar {
  position: sticky;
  top: 0;
  z-index: 40;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 1rem;
  min-height: 3.95rem;
  padding: 0.52rem 0.9rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  color: white;
  background: rgba(16, 20, 31, 0.94);
  backdrop-filter: blur(18px);
}

.player-brand {
  color: white;
}

.player-brand .brand-mark {
  box-shadow: 0 0 0 4px rgba(35, 197, 142, 0.12);
}

.player-course-title {
  min-width: 0;
  padding-left: 0.9rem;
  border-left: 1px solid rgba(255, 255, 255, 0.14);
}

.player-course-title span {
  display: block;
  color: rgba(255, 255, 255, 0.58);
  font-family: "JetBrains Mono", "Courier New", monospace;
  font-size: 0.68rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.player-course-title strong {
  display: block;
  overflow: hidden;
  color: white;
  font-size: 0.92rem;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.player-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.player-actions a,
.player-actions button {
  min-height: 2.25rem;
  padding: 0 0.82rem;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 10px;
  color: white;
  background: rgba(255, 255, 255, 0.06);
  font-family: "JetBrains Mono", "Courier New", monospace;
  font-size: 0.72rem;
  font-weight: 900;
  cursor: pointer;
}

.player-actions button {
  border-color: rgba(35, 197, 142, 0.55);
  background: #23c58e;
  color: #071611;
}

.lesson-player-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(22rem, 26rem);
  min-height: calc(100vh - 3.95rem);
}

.lesson-main {
  min-width: 0;
  color: white;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.03), transparent 28rem),
    #10141f;
}

.lesson-video-stage {
  position: relative;
  display: grid;
  place-items: center;
  min-height: clamp(23rem, 56vw, 42rem);
  padding: 3rem;
  overflow: hidden;
  background:
    radial-gradient(circle at 50% 44%, rgba(35, 197, 142, 0.14), transparent 17rem),
    linear-gradient(135deg, rgba(255, 255, 255, 0.07), transparent 40%),
    #151923;
}

.lesson-start-hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(18rem, 0.82fr);
  gap: clamp(1rem, 4vw, 3rem);
  align-items: center;
  min-height: clamp(22rem, 42vw, 34rem);
  padding: clamp(1.4rem, 5vw, 4rem);
  overflow: hidden;
  background:
    radial-gradient(circle at 18% 20%, rgba(35, 197, 142, 0.24), transparent 23rem),
    radial-gradient(circle at 88% 16%, rgba(245, 158, 11, 0.16), transparent 19rem),
    linear-gradient(135deg, #10141f, #151923 62%, #0b1411);
}

.lesson-start-hero::before {
  content: "";
  position: absolute;
  inset: 1.4rem;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 32px;
  background:
    linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px);
  background-size: 42px 42px;
  mask-image: radial-gradient(circle at 30% 40%, black, transparent 84%);
}

.lesson-start-hero .stage-caption {
  position: relative;
  left: auto;
  right: auto;
  bottom: auto;
  max-width: 58rem;
}

.lesson-start-hero .stage-caption h1 {
  font-size: clamp(2.35rem, 5.5vw, 5rem);
}

.lesson-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1rem;
}

.lesson-hero-map {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: auto minmax(2rem, 1fr) auto minmax(2rem, 1fr) auto;
  gap: 0.65rem;
  align-items: center;
  padding: 1rem;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 28px;
  color: white;
  background:
    radial-gradient(circle at 70% 10%, rgba(35, 197, 142, 0.22), transparent 13rem),
    rgba(255, 255, 255, 0.065);
  backdrop-filter: blur(16px);
}

.lesson-hero-map::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 1.6rem;
  width: 0.86rem;
  height: 0.86rem;
  border-radius: 50%;
  background: #f59e0b;
  box-shadow: 0 0 1.8rem rgba(245, 158, 11, 0.72);
  animation: boardPacket 4.8s ease-in-out infinite;
}

.lesson-hero-map span,
.lesson-hero-map b {
  position: relative;
  z-index: 1;
  display: grid;
  place-items: center;
  min-height: 3rem;
  padding: 0 0.85rem;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.1);
  font-family: "JetBrains Mono", "Courier New", monospace;
  font-size: 0.72rem;
  font-weight: 900;
  text-align: center;
}

.lesson-hero-map b {
  grid-column: 1 / -1;
  justify-self: center;
  color: #071611;
  background: #23c58e;
}

.lesson-hero-map i {
  height: 0.2rem;
  border-radius: 999px;
  background: linear-gradient(90deg, #23c58e, #f59e0b, #23c58e);
  background-size: 220% 100%;
  animation: flowMove 2.8s linear infinite;
}

.lesson-video-stage::before {
  content: "";
  position: absolute;
  inset: 2rem;
  border: 1px solid rgba(255, 255, 255, 0.07);
  border-radius: 32px;
  background:
    linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: radial-gradient(circle at center, black, transparent 78%);
}

.stage-orbit {
  position: absolute;
  width: min(36vw, 28rem);
  aspect-ratio: 1;
  border: 1px dashed rgba(35, 197, 142, 0.25);
  border-radius: 50%;
  animation: playerOrbit 18s linear infinite;
}

.stage-orbit i {
  position: absolute;
  width: 0.72rem;
  height: 0.72rem;
  border-radius: 50%;
  background: #23c58e;
  box-shadow: 0 0 2.4rem rgba(35, 197, 142, 0.75);
}

.stage-orbit i:nth-child(1) {
  top: 9%;
  left: 48%;
}

.stage-orbit i:nth-child(2) {
  right: 10%;
  top: 56%;
}

.stage-orbit i:nth-child(3) {
  left: 18%;
  bottom: 15%;
}

.lesson-play-button {
  position: relative;
  z-index: 2;
  display: grid;
  place-items: center;
  width: 7rem;
  height: 7rem;
  border: 0;
  border-radius: 50%;
  background:
    radial-gradient(circle at 35% 28%, rgba(255, 255, 255, 0.24), transparent 26%),
    linear-gradient(135deg, #23c58e, #0f8f68);
  box-shadow:
    0 0 0 1rem rgba(35, 197, 142, 0.08),
    0 1.6rem 4.8rem rgba(0, 0, 0, 0.45);
  cursor: pointer;
  transition: transform 180ms ease, box-shadow 180ms ease;
}

.lesson-play-button:hover {
  transform: scale(1.04);
}

.lesson-play-button span {
  width: 0;
  height: 0;
  margin-left: 0.35rem;
  border-top: 1.05rem solid transparent;
  border-bottom: 1.05rem solid transparent;
  border-left: 1.65rem solid white;
}

.lesson-play-button.is-paused span {
  width: 1.55rem;
  height: 1.9rem;
  margin-left: 0;
  border: 0;
  background:
    linear-gradient(90deg, white 0 34%, transparent 34% 66%, white 66% 100%);
}

.lesson-video-stage.is-playing .lesson-play-button {
  box-shadow:
    0 0 0 1rem rgba(35, 197, 142, 0.14),
    0 0 5rem rgba(35, 197, 142, 0.36);
}

.stage-micro-lesson {
  position: absolute;
  inset: 2.2rem 2.2rem auto auto;
  z-index: 2;
  display: grid;
  gap: 0.75rem;
  width: min(34rem, 42vw);
  pointer-events: none;
}

.stage-coach {
  justify-self: end;
  display: grid;
  gap: 0.18rem;
  max-width: 18rem;
  padding: 0.85rem 1rem;
  border: 1px solid rgba(35, 197, 142, 0.28);
  border-radius: 18px 18px 4px 18px;
  color: white;
  background:
    linear-gradient(135deg, rgba(35, 197, 142, 0.18), rgba(255, 255, 255, 0.07)),
    rgba(7, 22, 17, 0.68);
  backdrop-filter: blur(12px);
}

.stage-coach b,
.stage-concept-line span,
.animated-board span,
.animated-board b,
.scene-strip span,
.micro-play {
  font-family: "JetBrains Mono", "Courier New", monospace;
  font-weight: 900;
}

.stage-coach b {
  color: #23c58e;
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.stage-coach span {
  color: rgba(255, 255, 255, 0.78);
  font-size: 0.82rem;
  line-height: 1.35;
}

.stage-playback-panel {
  justify-self: end;
  display: grid;
  gap: 0.24rem;
  width: min(26rem, 100%);
  padding: 0.8rem 0.9rem;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 16px;
  color: white;
  background:
    radial-gradient(circle at 100% 0, rgba(245, 158, 11, 0.18), transparent 10rem),
    rgba(255, 255, 255, 0.07);
  backdrop-filter: blur(12px);
}

.stage-playback-panel span {
  color: #f59e0b;
  font-family: "JetBrains Mono", "Courier New", monospace;
  font-size: 0.64rem;
  font-weight: 900;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.stage-playback-panel strong {
  font-size: 0.98rem;
}

.stage-playback-panel small {
  color: rgba(255, 255, 255, 0.72);
  font-size: 0.78rem;
  line-height: 1.45;
}

.stage-playback-panel code {
  display: block;
  margin-top: 0.25rem;
  padding: 0.45rem 0.55rem;
  overflow: hidden;
  border-radius: 10px;
  color: #dfffee;
  background: rgba(7, 22, 17, 0.72);
  font-family: "JetBrains Mono", "Courier New", monospace;
  font-size: 0.68rem;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.stage-packet {
  justify-self: center;
  width: 1rem;
  height: 1rem;
  border-radius: 50%;
  background: #f59e0b;
  box-shadow: 0 0 2rem rgba(245, 158, 11, 0.76);
  animation: packetTravel 3.4s ease-in-out infinite;
}

.lesson-video-stage:not(.is-playing) .stage-packet,
.lesson-video-stage:not(.is-playing) .stage-orbit {
  animation-play-state: paused;
}

.stage-concept-line {
  display: grid;
  grid-template-columns: auto minmax(2rem, 1fr) auto minmax(2rem, 1fr) auto;
  align-items: center;
  gap: 0.45rem;
  padding: 0.55rem;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.06);
  backdrop-filter: blur(12px);
}

.stage-concept-line span {
  display: grid;
  place-items: center;
  min-height: 2.1rem;
  padding: 0 0.7rem;
  border-radius: 999px;
  color: white;
  background: rgba(255, 255, 255, 0.1);
  font-size: 0.68rem;
  white-space: nowrap;
}

.stage-concept-line i {
  height: 0.18rem;
  border-radius: 999px;
  background: linear-gradient(90deg, #23c58e, #f59e0b, #23c58e);
  background-size: 240% 100%;
  animation: flowMove 2.8s linear infinite;
}

.stage-caption {
  position: absolute;
  left: 2.2rem;
  right: 2.2rem;
  bottom: 2.2rem;
  z-index: 2;
  display: grid;
  max-width: 52rem;
  gap: 0.35rem;
}

.stage-caption h1 {
  color: white;
  font-family: "Source Serif 4", Georgia, serif;
  font-size: clamp(2rem, 4vw, 4rem);
  line-height: 0.98;
}

.stage-caption span {
  color: rgba(255, 255, 255, 0.72);
  line-height: 1.6;
}

.stage-timeline {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 0.38rem;
  background: rgba(255, 255, 255, 0.1);
}

.stage-timeline b {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, #23c58e, #f59e0b);
  box-shadow: 0 0 1.4rem rgba(35, 197, 142, 0.46);
  transition: width 320ms ease;
}

.lesson-player-tabs {
  display: flex;
  gap: 0.15rem;
  overflow-x: auto;
  padding: 0.72rem 1.25rem 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  background: white;
}

.lesson-player-tabs a {
  min-height: 2.55rem;
  padding: 0.75rem 0.9rem;
  color: #485267;
  border-bottom: 3px solid transparent;
  font-weight: 800;
  white-space: nowrap;
}

.lesson-player-tabs a:hover,
.lesson-player-tabs a:focus-visible {
  color: #10141f;
  border-bottom-color: #23c58e;
}

.lesson-player-content {
  display: grid;
  gap: 1.15rem;
  padding: 1.4rem clamp(1rem, 3vw, 2rem) 3rem;
  color: #10141f;
  background: #f7faf4;
}

.player-card,
.player-lock-banner {
  display: grid;
  gap: 1rem;
  padding: clamp(1rem, 2vw, 1.35rem);
  border: 1px solid rgba(16, 36, 29, 0.12);
  border-radius: 22px;
  background:
    radial-gradient(circle at 0 0, rgba(35, 197, 142, 0.11), transparent 22rem),
    rgba(255, 255, 255, 0.88);
  box-shadow: 0 1.2rem 3.2rem rgba(16, 36, 29, 0.1);
}

.player-card h2 {
  margin: 0 0 0.45rem;
  font-family: "Source Serif 4", Georgia, serif;
  font-size: clamp(1.65rem, 3vw, 2.45rem);
}

.player-card p,
.player-card li,
.player-lock-banner p {
  color: #526054;
  line-height: 1.65;
}

.player-study-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.85rem;
}

.player-study-grid section {
  min-width: 0;
  padding: 1rem;
  border: 1px solid rgba(16, 36, 29, 0.1);
  border-radius: 18px;
  background: rgba(246, 249, 244, 0.78);
}

.player-study-grid span {
  color: var(--green);
  font-family: "JetBrains Mono", "Courier New", monospace;
  font-weight: 900;
}

.player-study-grid h3 {
  margin: 0.35rem 0 0.55rem;
}

.lesson-outcomes,
.lesson-roadmap-card ol {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.75rem;
}

.lesson-outcomes section,
.lesson-roadmap-card li {
  display: grid;
  gap: 0.45rem;
  min-width: 0;
  padding: 0.9rem;
  border: 1px solid rgba(16, 36, 29, 0.1);
  border-radius: 18px;
  background: rgba(246, 249, 244, 0.82);
}

.lesson-outcomes span,
.lesson-roadmap-card span {
  justify-self: start;
  padding: 0.2rem 0.48rem;
  border-radius: 999px;
  color: #071611;
  background: #23c58e;
  font-family: "JetBrains Mono", "Courier New", monospace;
  font-size: 0.68rem;
  font-weight: 900;
}

.lesson-roadmap-card ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

.lesson-roadmap-card p,
.lesson-outcomes strong {
  margin: 0;
  line-height: 1.45;
}

.beginner-primer-card {
  border-color: rgba(35, 197, 142, 0.18);
  background:
    radial-gradient(circle at 12% 0, rgba(35, 197, 142, 0.14), transparent 22rem),
    linear-gradient(135deg, rgba(255, 255, 255, 0.96), rgba(246, 249, 244, 0.9));
}

.primer-head {
  max-width: 62rem;
}

.primer-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.85rem;
}

.primer-grid section {
  display: grid;
  gap: 0.5rem;
  padding: 1rem;
  border: 1px solid rgba(16, 36, 29, 0.1);
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.76);
  box-shadow: 0 0.9rem 2rem rgba(16, 36, 29, 0.07);
}

.primer-grid span {
  color: var(--green);
  font-family: "JetBrains Mono", "Courier New", monospace;
  font-size: 0.66rem;
  font-weight: 900;
  text-transform: uppercase;
}

.primer-grid strong {
  font-size: 1rem;
  line-height: 1.24;
}

.primer-grid p {
  margin: 0;
  color: var(--muted);
  font-size: 0.86rem;
  line-height: 1.55;
}

.visual-studio-card {
  overflow: hidden;
  border-color: rgba(35, 197, 142, 0.22);
  color: white;
  background:
    radial-gradient(circle at 14% 20%, rgba(35, 197, 142, 0.22), transparent 22rem),
    radial-gradient(circle at 82% 12%, rgba(245, 158, 11, 0.18), transparent 18rem),
    linear-gradient(135deg, #10141f, #17212b 58%, #071611);
}

.visual-studio-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 1rem;
  align-items: start;
}

.visual-studio-head h2 {
  margin-bottom: 0.35rem;
  font-family: "Source Serif 4", Georgia, serif;
  font-size: clamp(2rem, 4vw, 4rem);
}

.visual-studio-head p {
  max-width: 64rem;
  color: rgba(255, 255, 255, 0.72);
}

.visual-studio-head > span {
  padding: 0.45rem 0.72rem;
  border: 1px solid rgba(35, 197, 142, 0.28);
  border-radius: 999px;
  color: #071611;
  background: #23c58e;
  font-family: "JetBrains Mono", "Courier New", monospace;
  font-size: 0.72rem;
  font-weight: 900;
}

.visual-studio-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(18rem, 0.75fr);
  gap: 1rem;
  align-items: stretch;
}

.visual-story-rail {
  display: grid;
  gap: 0.65rem;
}

.visual-story-rail section {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.24rem 0.65rem;
  align-items: start;
  padding: 0.8rem;
  border: 1px solid rgba(255, 255, 255, 0.11);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.07);
  animation: visualRailPulse 8s ease-in-out infinite;
  animation-delay: calc(var(--i, 0) * 650ms);
}

.visual-story-rail span {
  display: grid;
  place-items: center;
  width: 1.7rem;
  height: 1.7rem;
  border-radius: 50%;
  color: #071611;
  background: #23c58e;
  font-family: "JetBrains Mono", "Courier New", monospace;
  font-size: 0.66rem;
  font-weight: 900;
}

.visual-story-rail strong {
  line-height: 1.2;
}

.visual-story-rail small {
  grid-column: 2;
  color: rgba(255, 255, 255, 0.62);
  line-height: 1.4;
}

.visual-mockup {
  position: relative;
  display: grid;
  grid-template-rows: auto minmax(0, 1fr) auto;
  min-height: 21rem;
  overflow: hidden;
  border: 1px solid rgba(35, 197, 142, 0.18);
  border-radius: 26px;
  color: #eafff5;
  background:
    linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.028) 1px, transparent 1px),
    radial-gradient(circle at 18% 20%, rgba(35, 197, 142, 0.2), transparent 18rem),
    #071611;
  background-size: 34px 34px, 34px 34px, auto, auto;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.04), 0 1.5rem 3.5rem rgba(0, 0, 0, 0.22);
}

.visual-hero {
  min-height: clamp(25rem, 34vw, 35rem);
}

.visual-window-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.8rem;
  padding: 0.75rem 0.9rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(255, 255, 255, 0.055);
}

.visual-window-top span {
  display: flex;
  gap: 0.28rem;
}

.visual-window-top i {
  width: 0.58rem;
  height: 0.58rem;
  border-radius: 50%;
  background: #23c58e;
}

.visual-window-top i:nth-child(2) {
  background: #f59e0b;
}

.visual-window-top i:nth-child(3) {
  background: #ef4444;
}

.visual-window-top strong,
.visual-window-top em {
  font-family: "JetBrains Mono", "Courier New", monospace;
  font-size: 0.68rem;
  font-style: normal;
  font-weight: 900;
  text-transform: uppercase;
}

.visual-window-top em {
  color: #071611;
  background: #23c58e;
  border-radius: 999px;
  padding: 0.16rem 0.5rem;
}

.visual-value-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.45rem;
  padding: 0.75rem;
}

.visual-value-strip span {
  display: grid;
  gap: 0.14rem;
  min-width: 0;
  padding: 0.58rem;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.06);
  color: rgba(255, 255, 255, 0.86);
  font-size: 0.74rem;
}

.visual-value-strip b {
  color: #23c58e;
  font-family: "JetBrains Mono", "Courier New", monospace;
  font-size: 0.56rem;
  text-transform: uppercase;
}

.visual-topology-map {
  position: relative;
  display: grid;
  grid-template-columns: minmax(5rem, 1fr) minmax(3rem, 0.45fr) minmax(5rem, 1fr) minmax(3rem, 0.45fr) minmax(5rem, 1fr);
  gap: 0.7rem;
  align-items: center;
  padding: clamp(1rem, 3vw, 2rem);
}

.visual-node {
  position: relative;
  z-index: 2;
  display: grid;
  gap: 0.35rem;
  min-height: 7.5rem;
  padding: 1rem;
  border: 1px solid rgba(35, 197, 142, 0.24);
  border-radius: 22px;
  background:
    radial-gradient(circle at 70% 0, rgba(35, 197, 142, 0.18), transparent 8rem),
    rgba(255, 255, 255, 0.075);
}

.visual-node::before {
  content: "";
  width: 2.5rem;
  height: 2rem;
  border-radius: 9px;
  background: linear-gradient(135deg, #23c58e, #dfffee);
  box-shadow: 0 0.6rem 1.6rem rgba(35, 197, 142, 0.2);
}

.node-b::before {
  border-radius: 50%;
  background: linear-gradient(135deg, #f59e0b, #fff1c7);
}

.node-c::before {
  background: linear-gradient(135deg, #60a5fa, #dbeafe);
}

.visual-node b {
  font-size: 1rem;
}

.visual-node small {
  color: rgba(255, 255, 255, 0.6);
  line-height: 1.35;
}

.visual-cable {
  height: 0.24rem;
  border-radius: 999px;
  background: linear-gradient(90deg, rgba(35, 197, 142, 0.15), #23c58e, #f59e0b);
  background-size: 220% 100%;
  animation: flowMove 2.4s linear infinite;
}

.visual-packet {
  position: absolute;
  z-index: 3;
  top: 50%;
  left: 8%;
  width: 1rem;
  height: 1rem;
  border-radius: 50%;
  background: #f59e0b;
  box-shadow: 0 0 1.8rem rgba(245, 158, 11, 0.72);
  animation: visualPacket 5.2s ease-in-out infinite;
}

.visual-terminal-screen,
.visual-code-editor,
.visual-directory-console,
.visual-web-lab,
.visual-policy-table,
.visual-cloud-iam,
.visual-mail-trace,
.visual-forensics,
.visual-risk-grid,
.visual-db-console,
.visual-k8s-board,
.visual-dashboard-grid {
  margin: 0.85rem;
  min-height: 15rem;
}

.visual-terminal-screen,
.visual-db-console pre,
.visual-json {
  padding: 1rem;
  border: 1px solid rgba(35, 197, 142, 0.18);
  border-radius: 18px;
  color: #baf7d8;
  background: rgba(0, 0, 0, 0.34);
  font-family: "JetBrains Mono", "Courier New", monospace;
}

.visual-terminal-screen p {
  margin: 0 0 0.75rem;
}

.visual-terminal-screen code,
.visual-code-editor code {
  display: block;
  margin-top: 0.3rem;
  color: #dfffee;
}

.terminal-cursor {
  display: inline-block;
  width: 0.6rem;
  height: 1rem;
  margin-top: 0.8rem;
  background: #23c58e;
  animation: cursorBlink 1s steps(2) infinite;
}

.visual-code-editor,
.visual-directory-console,
.visual-web-lab {
  display: grid;
  grid-template-columns: minmax(7rem, 0.34fr) minmax(0, 1fr);
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.09);
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.06);
}

.visual-code-editor aside,
.visual-directory-console aside {
  display: grid;
  align-content: start;
  gap: 0.45rem;
  padding: 0.85rem;
  background: rgba(255, 255, 255, 0.07);
}

.visual-code-editor aside span,
.visual-directory-console aside span,
.visual-directory-console aside b {
  padding: 0.38rem 0.5rem;
  border-radius: 9px;
  background: rgba(255, 255, 255, 0.07);
  font-size: 0.72rem;
}

.visual-code-editor pre {
  margin: 0;
  padding: 1rem;
  color: #dfffee;
  font-family: "JetBrains Mono", "Courier New", monospace;
}

.visual-directory-console main,
.visual-web-lab {
  gap: 0.65rem;
  padding: 0.85rem;
}

.ad-card,
.visual-web-lab section,
.visual-cloud-iam section,
.visual-forensics section,
.visual-k8s-board section,
.metric {
  display: grid;
  gap: 0.3rem;
  padding: 0.8rem;
  border: 1px solid rgba(35, 197, 142, 0.16);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.07);
}

.ad-card.active,
.visual-policy-table .active,
.mail-card.warning {
  border-color: rgba(245, 158, 11, 0.55);
  background: rgba(245, 158, 11, 0.14);
}

.visual-web-lab code,
.visual-policy-table span,
.visual-policy-table em,
.visual-db-console table,
.visual-json {
  font-family: "JetBrains Mono", "Courier New", monospace;
  font-size: 0.72rem;
}

.visual-policy-table {
  display: grid;
  align-content: start;
  gap: 0.45rem;
}

.visual-policy-table > div {
  display: grid;
  grid-template-columns: 0.4fr 1fr 1fr 0.7fr;
  gap: 0.5rem;
  align-items: center;
  padding: 0.62rem;
  border-radius: 13px;
  background: rgba(255, 255, 255, 0.07);
}

.visual-policy-table em {
  justify-self: start;
  padding: 0.16rem 0.45rem;
  border-radius: 999px;
  color: #071611;
  background: #23c58e;
  font-style: normal;
  font-weight: 900;
}

.visual-cloud-iam,
.visual-forensics,
.visual-k8s-board {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.75rem;
}

.visual-mail-trace {
  display: grid;
  align-content: center;
  gap: 1rem;
}

.mail-timeline {
  display: grid;
  grid-template-columns: 1fr auto auto auto;
  gap: 0.65rem;
  align-items: center;
}

.mail-timeline i {
  height: 0.22rem;
  border-radius: 999px;
  background: linear-gradient(90deg, #23c58e, #f59e0b, #ef4444);
}

.visual-risk-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.7rem;
}

.visual-risk-grid span {
  min-height: 4rem;
  border-radius: 16px;
  background: rgba(35, 197, 142, 0.18);
}

.visual-risk-grid .warm {
  background: rgba(245, 158, 11, 0.35);
}

.visual-risk-grid .hot,
.visual-risk-grid .active {
  background: rgba(239, 68, 68, 0.48);
  box-shadow: 0 0 2rem rgba(239, 68, 68, 0.18);
}

.visual-db-console table {
  width: 100%;
  margin-top: 0.7rem;
  border-collapse: collapse;
}

.visual-db-console th,
.visual-db-console td {
  padding: 0.52rem;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.visual-dashboard-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.7rem;
}

.chart {
  display: flex;
  align-items: end;
  gap: 0.35rem;
  min-height: 7rem;
  padding: 0.8rem;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.07);
}

.chart i {
  flex: 1;
  border-radius: 999px 999px 0 0;
  background: linear-gradient(180deg, #23c58e, rgba(35, 197, 142, 0.15));
  animation: visualBars 900ms ease-in-out infinite alternate;
}

.chart i:nth-child(2) { height: 54%; animation-delay: 120ms; }
.chart i:nth-child(3) { height: 82%; animation-delay: 240ms; }
.chart i:nth-child(4) { height: 38%; animation-delay: 360ms; }
.chart i:nth-child(1) { height: 68%; }

.logline {
  grid-column: 1 / -1;
  padding: 0.8rem;
  border-radius: 16px;
  color: #baf7d8;
  background: rgba(0, 0, 0, 0.24);
  font-family: "JetBrains Mono", "Courier New", monospace;
  font-size: 0.72rem;
}

.teacher-flow {
  display: grid;
  gap: 1.15rem;
}

.teacher-section {
  display: grid;
  grid-template-columns: minmax(22rem, 1.08fr) minmax(0, 0.92fr);
  gap: 1rem;
  padding: clamp(1rem, 2vw, 1.35rem);
  border: 1px solid rgba(16, 36, 29, 0.12);
  border-radius: 24px;
  background:
    radial-gradient(circle at 8% 0, rgba(35, 197, 142, 0.12), transparent 20rem),
    rgba(255, 255, 255, 0.92);
  box-shadow: 0 1.2rem 3.2rem rgba(16, 36, 29, 0.1);
}

.visual-step-section .visual-mockup {
  min-height: 24rem;
}

.teacher-copy h2 {
  margin: 0 0 0.45rem;
  font-family: "Source Serif 4", Georgia, serif;
  font-size: clamp(1.65rem, 3vw, 2.35rem);
}

.teacher-copy > p:not(.eyebrow) {
  display: -webkit-box;
  overflow: hidden;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 4;
}

.teacher-copy ul {
  display: grid;
  gap: 0.55rem;
  margin: 0.95rem 0 0;
  padding: 0;
  list-style: none;
}

.teacher-copy li {
  padding: 0.75rem;
  border-left: 4px solid #23c58e;
  border-radius: 12px;
  background: rgba(15, 143, 104, 0.08);
}

.teacher-step-plan {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.65rem;
  margin-top: 1rem;
}

.teacher-step-plan section {
  display: grid;
  gap: 0.35rem;
  padding: 0.78rem;
  border: 1px solid rgba(16, 36, 29, 0.1);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.72);
}

.teacher-step-plan span {
  justify-self: start;
  padding: 0.16rem 0.42rem;
  border-radius: 999px;
  color: #071611;
  background: #23c58e;
  font-family: "JetBrains Mono", "Courier New", monospace;
  font-size: 0.62rem;
  font-weight: 900;
}

.teacher-step-plan strong {
  font-size: 0.9rem;
}

.teacher-step-plan p {
  margin: 0;
  color: var(--muted);
  font-size: 0.8rem;
  line-height: 1.45;
}

.teacher-console {
  display: grid;
  align-content: start;
  gap: 0.75rem;
  overflow: hidden;
  border-radius: 20px;
  color: #dfffee;
  background: #071611;
  box-shadow: inset 0 0 0 1px rgba(35, 197, 142, 0.16);
}

.console-top,
.lab-sim-output > div {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.7rem;
  padding: 0.75rem 0.85rem;
  background: rgba(255, 255, 255, 0.07);
}

.console-top span,
.console-top em,
.lab-sim-output span,
.lab-sim-output em {
  font-family: "JetBrains Mono", "Courier New", monospace;
  font-size: 0.68rem;
  font-style: normal;
  font-weight: 900;
  text-transform: uppercase;
}

.console-top span,
.lab-sim-output span {
  color: #23c58e;
}

.console-top em,
.lab-sim-output em {
  color: #071611;
  background: #f59e0b;
  border-radius: 999px;
  padding: 0.18rem 0.5rem;
}

.teacher-console pre,
.lab-sim-output pre {
  margin: 0 0.85rem;
  padding: 0.82rem;
  overflow: auto;
  border: 1px solid rgba(35, 197, 142, 0.18);
  border-radius: 14px;
  background: rgba(0, 0, 0, 0.24);
  color: #dfffee;
  font-family: "JetBrains Mono", "Courier New", monospace;
  font-size: 0.78rem;
  white-space: pre-wrap;
}

.console-values {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.55rem;
  padding: 0 0.85rem 0.85rem;
}

.console-values section {
  display: grid;
  gap: 0.16rem;
  padding: 0.62rem;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 13px;
  background: rgba(255, 255, 255, 0.055);
}

.console-values span {
  color: rgba(255, 255, 255, 0.52);
  font-size: 0.58rem;
  text-transform: uppercase;
}

.console-values strong {
  overflow: hidden;
  color: white;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.inline-check {
  display: grid;
  grid-column: 1 / -1;
  gap: 0.75rem;
  padding: 0.95rem;
  border: 1px solid rgba(245, 158, 11, 0.26);
  border-radius: 18px;
  background: rgba(255, 248, 235, 0.78);
}

.inline-check span {
  color: #9a5a00;
  font-family: "JetBrains Mono", "Courier New", monospace;
  font-size: 0.66rem;
  font-weight: 900;
  text-transform: uppercase;
}

.inline-options {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.55rem;
}

.inline-options button {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.5rem;
  align-items: center;
  min-height: 3rem;
  padding: 0.65rem;
  border: 1px solid rgba(16, 36, 29, 0.12);
  border-radius: 14px;
  background: white;
  color: var(--ink);
  cursor: pointer;
  text-align: left;
}

.inline-options b {
  display: grid;
  place-items: center;
  width: 1.55rem;
  height: 1.55rem;
  border-radius: 50%;
  color: white;
  background: var(--ink);
  font-family: "JetBrains Mono", "Courier New", monospace;
  font-size: 0.68rem;
}

.inline-options button.is-correct {
  border-color: rgba(35, 197, 142, 0.55);
  background: rgba(35, 197, 142, 0.13);
}

.inline-options button.is-wrong {
  border-color: rgba(220, 38, 38, 0.42);
  background: rgba(220, 38, 38, 0.08);
}

.inline-check [data-check-feedback] {
  display: none;
  margin: 0;
  color: #5c4715;
}

.inline-check [data-check-feedback].is-visible {
  display: block;
}

.lab-simulator-card {
  border-color: rgba(35, 197, 142, 0.24);
}

.lab-sim-head {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
}

.lab-sim-head > span {
  align-self: start;
  padding: 0.35rem 0.62rem;
  border-radius: 999px;
  color: #071611;
  background: #23c58e;
  font-family: "JetBrains Mono", "Courier New", monospace;
  font-size: 0.72rem;
  font-weight: 900;
}

.lab-sim-shell {
  display: grid;
  grid-template-columns: minmax(12rem, 0.38fr) minmax(0, 1fr);
  gap: 0.85rem;
}

.lab-sim-actions {
  display: grid;
  gap: 0.5rem;
}

.lab-sim-actions button {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.5rem;
  align-items: center;
  padding: 0.7rem;
  border: 1px solid rgba(16, 36, 29, 0.12);
  border-radius: 14px;
  background: rgba(246, 249, 244, 0.8);
  color: var(--ink);
  cursor: pointer;
  text-align: left;
}

.lab-sim-actions button.is-active {
  border-color: rgba(35, 197, 142, 0.48);
  background: rgba(35, 197, 142, 0.14);
}

.lab-sim-actions span {
  display: grid;
  place-items: center;
  width: 1.7rem;
  height: 1.7rem;
  border-radius: 50%;
  color: white;
  background: var(--ink);
  font-family: "JetBrains Mono", "Courier New", monospace;
  font-size: 0.68rem;
  font-weight: 900;
}

.lab-sim-output {
  display: grid;
  gap: 0.75rem;
  overflow: hidden;
  border-radius: 20px;
  color: #dfffee;
  background: #071611;
}

.lab-sim-output section {
  min-height: 7rem;
  margin: 0 0.85rem 0.85rem;
  padding: 0.82rem;
  border: 1px solid rgba(35, 197, 142, 0.16);
  border-radius: 14px;
  color: #baf7d8;
  background: rgba(35, 197, 142, 0.06);
  font-family: "JetBrains Mono", "Courier New", monospace;
  white-space: pre-wrap;
}

.quick-summary-card {
  border-color: rgba(35, 197, 142, 0.26);
  background:
    radial-gradient(circle at 90% 0, rgba(35, 197, 142, 0.18), transparent 18rem),
    rgba(255, 255, 255, 0.92);
}

.player-card ul,
.player-card ol {
  display: grid;
  gap: 0.52rem;
  margin: 0;
  padding-left: 1.15rem;
}

.player-action-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
}

.button.ghost {
  border: 1px solid transparent;
  color: var(--green);
  background: rgba(15, 143, 104, 0.08);
}

.button:disabled {
  opacity: 0.56;
  cursor: not-allowed;
}

.player-lock-banner {
  border-color: rgba(245, 158, 11, 0.4);
  background:
    linear-gradient(135deg, rgba(245, 158, 11, 0.15), rgba(255, 255, 255, 0.9));
}

.flow-animation {
  display: grid;
  grid-template-columns: auto 1fr auto 1fr auto;
  align-items: center;
  gap: 0.7rem;
  padding: 1.2rem;
  border-radius: 22px;
  color: white;
  background:
    radial-gradient(circle at 70% 30%, rgba(35, 197, 142, 0.28), transparent 15rem),
    #10141f;
}

.flow-animation span,
.flow-animation b {
  display: grid;
  place-items: center;
  min-height: 3rem;
  padding: 0 0.9rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.11);
  font-family: "JetBrains Mono", "Courier New", monospace;
  font-size: 0.74rem;
  font-weight: 900;
}

.flow-animation b {
  color: #071611;
  background: #23c58e;
}

.flow-animation i {
  height: 0.22rem;
  border-radius: 999px;
  background: linear-gradient(90deg, #23c58e, #f59e0b, #23c58e);
  background-size: 220% 100%;
  animation: flowMove 2.8s linear infinite;
}

.micro-video-card {
  overflow: hidden;
  border-color: rgba(35, 197, 142, 0.2);
  background:
    radial-gradient(circle at 92% 18%, rgba(35, 197, 142, 0.18), transparent 18rem),
    linear-gradient(135deg, rgba(255, 255, 255, 0.94), rgba(236, 247, 240, 0.9));
}

.media-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 1rem;
  align-items: start;
}

.micro-play {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  min-height: 2.8rem;
  padding: 0 0.9rem;
  border: 1px solid rgba(16, 36, 29, 0.18);
  border-radius: 999px;
  color: #071611;
  background: #23c58e;
  cursor: pointer;
  box-shadow: 0 0.9rem 1.8rem rgba(15, 143, 104, 0.18);
}

.micro-play span {
  width: 0;
  height: 0;
  border-top: 0.45rem solid transparent;
  border-bottom: 0.45rem solid transparent;
  border-left: 0.7rem solid #071611;
}

.micro-play b {
  font-size: 0.72rem;
  white-space: nowrap;
}

.micro-play.is-paused {
  background: #f59e0b;
}

.micro-play.is-paused span {
  width: 0.7rem;
  height: 0.9rem;
  border: 0;
  background:
    linear-gradient(90deg, #071611 0 36%, transparent 36% 64%, #071611 64% 100%);
}

.micro-play.is-finished {
  background: white;
}

.micro-video-studio {
  display: grid;
  grid-template-columns: minmax(14rem, 0.36fr) minmax(0, 1fr);
  gap: 1rem;
  align-items: stretch;
  padding: 1rem;
  border: 1px solid rgba(16, 36, 29, 0.1);
  border-radius: 24px;
  background:
    linear-gradient(rgba(16, 36, 29, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(16, 36, 29, 0.035) 1px, transparent 1px),
    rgba(247, 250, 244, 0.78);
  background-size: 28px 28px, 28px 28px, auto;
}

.visual-brief {
  display: grid;
  align-content: start;
  gap: 0.72rem;
  padding: 1rem;
  border-radius: 22px;
  color: white;
  background:
    radial-gradient(circle at 100% 0, rgba(35, 197, 142, 0.24), transparent 11rem),
    #10141f;
}

.visual-meter {
  display: flex;
  align-items: end;
  gap: 0.28rem;
  min-height: 2.2rem;
}

.visual-meter span {
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 50%;
  background:
    radial-gradient(circle at 38% 34%, rgba(255, 255, 255, 0.9), transparent 0.22rem),
    radial-gradient(circle at 64% 34%, rgba(255, 255, 255, 0.9), transparent 0.22rem),
    linear-gradient(135deg, #23c58e, #0f8f68);
  box-shadow: 0 0 1.8rem rgba(35, 197, 142, 0.35);
}

.visual-meter i {
  width: 0.34rem;
  height: 0.8rem;
  border-radius: 999px;
  background: #23c58e;
  opacity: 0.45;
}

.visual-meter i:nth-child(3) {
  height: 1.35rem;
}

.visual-meter i:nth-child(4) {
  height: 1.05rem;
}

.micro-video-studio.is-playing .visual-meter i {
  animation: visualBars 760ms ease-in-out infinite alternate;
}

.micro-video-studio.is-playing .visual-meter i:nth-child(3) {
  animation-delay: 140ms;
}

.micro-video-studio.is-playing .visual-meter i:nth-child(4) {
  animation-delay: 280ms;
}

.visual-brief strong {
  color: #23c58e;
  font-family: "JetBrains Mono", "Courier New", monospace;
  font-size: 0.78rem;
  text-transform: uppercase;
}

.visual-brief p {
  min-height: 8.5rem;
  color: rgba(255, 255, 255, 0.78);
  line-height: 1.62;
}

.visual-brief small {
  color: rgba(255, 255, 255, 0.52);
  font-size: 0.74rem;
  line-height: 1.45;
}

.pro-video-screen {
  grid-column: 2;
  overflow: hidden;
  border: 1px solid rgba(16, 36, 29, 0.12);
  border-radius: 22px;
  background: #0b1411;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.04);
}

.screen-window-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.72rem 0.85rem;
  color: white;
  background: rgba(255, 255, 255, 0.08);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.screen-window-top span,
.screen-window-top em,
.screen-values span,
.screen-action {
  font-family: "JetBrains Mono", "Courier New", monospace;
  font-weight: 900;
}

.screen-window-top span {
  color: #23c58e;
  font-size: 0.74rem;
  text-transform: uppercase;
}

.screen-window-top em {
  padding: 0.22rem 0.5rem;
  border-radius: 999px;
  color: #071611;
  background: #f59e0b;
  font-size: 0.62rem;
  font-style: normal;
  text-transform: uppercase;
}

.screen-workspace {
  display: grid;
  gap: 0.8rem;
  padding: 0.95rem;
}

.screen-map {
  position: relative;
  display: grid;
  grid-template-columns: auto minmax(2rem, 1fr) auto minmax(2rem, 1fr) auto;
  align-items: center;
  gap: 0.55rem;
  min-height: 5.6rem;
  padding: 0.9rem;
  overflow: hidden;
  border-radius: 18px;
  background:
    linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    rgba(255, 255, 255, 0.05);
  background-size: 24px 24px, 24px 24px, auto;
}

.screen-map::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 1.4rem;
  width: 0.78rem;
  height: 0.78rem;
  border-radius: 50%;
  background: #f59e0b;
  box-shadow: 0 0 1.8rem rgba(245, 158, 11, 0.78);
  animation: boardPacket 4s ease-in-out infinite;
}

.micro-video-studio:not(.is-playing) .screen-map::after {
  animation-play-state: paused;
}

.screen-map span {
  position: relative;
  z-index: 1;
  display: grid;
  place-items: center;
  min-height: 2.7rem;
  padding: 0 0.7rem;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 999px;
  color: white;
  background: rgba(255, 255, 255, 0.1);
  font-family: "JetBrains Mono", "Courier New", monospace;
  font-size: 0.68rem;
  font-weight: 900;
  text-align: center;
}

.screen-map i {
  height: 0.2rem;
  border-radius: 999px;
  background: linear-gradient(90deg, #23c58e, #f59e0b, #23c58e);
  background-size: 220% 100%;
  animation: flowMove 2.6s linear infinite;
}

.pro-video-screen[data-screen-focus="source"] [data-screen-node="source"],
.pro-video-screen[data-screen-focus="middle"] [data-screen-node="middle"],
.pro-video-screen[data-screen-focus="target"] [data-screen-node="target"] {
  color: #071611;
  background: #23c58e;
  box-shadow: 0 0 1.4rem rgba(35, 197, 142, 0.36);
}

.screen-values {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.55rem;
}

.screen-values article {
  display: grid;
  gap: 0.22rem;
  min-width: 0;
  padding: 0.65rem;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.06);
}

.screen-values span {
  color: rgba(255, 255, 255, 0.52);
  font-size: 0.58rem;
  text-transform: uppercase;
}

.screen-values strong {
  overflow: hidden;
  color: white;
  font-size: 0.82rem;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.screen-workspace pre {
  min-height: 4.6rem;
  margin: 0;
  padding: 0.8rem;
  overflow: auto;
  border: 1px solid rgba(35, 197, 142, 0.18);
  border-radius: 14px;
  color: #dfffee;
  background: #071611;
  font-family: "JetBrains Mono", "Courier New", monospace;
  font-size: 0.76rem;
  line-height: 1.45;
  white-space: pre-wrap;
}

.screen-action {
  display: inline-flex;
  justify-self: start;
  padding: 0.5rem 0.72rem;
  border-radius: 999px;
  color: #071611;
  background: #23c58e;
  font-size: 0.68rem;
  text-transform: uppercase;
}

.video-progress-card {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 0.65rem;
  align-items: center;
  padding: 0.6rem 0.72rem;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.055);
}

.video-progress-card span {
  color: rgba(255, 255, 255, 0.78);
  font-family: "JetBrains Mono", "Courier New", monospace;
  font-size: 0.66rem;
  font-weight: 900;
}

.video-progress-card b {
  position: relative;
  display: block;
  overflow: hidden;
  height: 0.42rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.13);
}

.video-progress-card i {
  position: absolute;
  inset: 0 auto 0 0;
  width: 0;
  border-radius: inherit;
  background: linear-gradient(90deg, #23c58e, #f59e0b);
  box-shadow: 0 0 1.2rem rgba(35, 197, 142, 0.42);
}

.screen-narration {
  display: grid;
  gap: 0.28rem;
  padding: 0.78rem;
  border: 1px solid rgba(35, 197, 142, 0.17);
  border-radius: 16px;
  background:
    linear-gradient(135deg, rgba(35, 197, 142, 0.11), rgba(255, 255, 255, 0.04));
}

.screen-narration strong {
  color: #23c58e;
}

.screen-narration p {
  margin: 0;
  color: rgba(255, 255, 255, 0.76);
  font-size: 0.82rem;
  line-height: 1.48;
}

.interlude-card {
  grid-template-columns: minmax(14rem, 0.34fr) minmax(0, 1fr);
  gap: 1rem;
  overflow: hidden;
  border-color: rgba(245, 158, 11, 0.2);
  background:
    radial-gradient(circle at 12% 10%, rgba(245, 158, 11, 0.14), transparent 15rem),
    linear-gradient(135deg, rgba(255, 255, 255, 0.96), rgba(247, 250, 244, 0.88));
}

.interlude-copy {
  display: grid;
  align-content: center;
  gap: 0.35rem;
}

.interlude-copy h2 {
  margin: 0;
}

.interlude-copy p:not(.eyebrow) {
  color: var(--muted);
  line-height: 1.62;
}

.interlude-board {
  position: relative;
  display: grid;
  gap: 0.8rem;
  padding: 0.9rem;
  overflow: hidden;
  border-radius: 22px;
  color: white;
  background:
    linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    #071611;
  background-size: 26px 26px, 26px 26px, auto;
}

.interlude-board::after {
  content: "";
  position: absolute;
  inset: auto 0 0;
  height: 0.28rem;
  background: linear-gradient(90deg, #23c58e, #f59e0b, #23c58e);
  transform-origin: left;
  animation: interludeTimeline 16s linear infinite;
}

.interlude-flow {
  position: relative;
  display: grid;
  grid-template-columns: auto minmax(2rem, 1fr) auto minmax(2rem, 1fr) auto;
  gap: 0.55rem;
  align-items: center;
  min-height: 4.5rem;
  padding: 0.75rem;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.055);
}

.interlude-flow::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 1.4rem;
  width: 0.75rem;
  height: 0.75rem;
  border-radius: 50%;
  background: #f59e0b;
  box-shadow: 0 0 1.6rem rgba(245, 158, 11, 0.78);
  animation: boardPacket 4s ease-in-out infinite;
}

.interlude-flow span,
.interlude-flow b {
  position: relative;
  z-index: 1;
  display: grid;
  place-items: center;
  min-height: 2.45rem;
  padding: 0 0.7rem;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.1);
  font-family: "JetBrains Mono", "Courier New", monospace;
  font-size: 0.68rem;
  font-weight: 900;
  text-align: center;
}

.interlude-flow b {
  grid-column: 1 / -1;
  justify-self: center;
  color: #071611;
  background: #23c58e;
}

.interlude-flow i {
  height: 0.18rem;
  border-radius: 999px;
  background: linear-gradient(90deg, #23c58e, #f59e0b, #23c58e);
  background-size: 220% 100%;
  animation: flowMove 2.6s linear infinite;
}

.interlude-steps {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.55rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.interlude-steps li {
  display: grid;
  align-content: start;
  gap: 0.35rem;
  min-height: 10.5rem;
  padding: 0.75rem;
  border: 1px solid rgba(255, 255, 255, 0.09);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.06);
  opacity: 0.42;
  transform: translateY(0);
  animation: interludeStep 16s ease-in-out infinite;
  animation-delay: calc(var(--i) * 4s);
}

.interlude-steps span {
  justify-self: start;
  padding: 0.18rem 0.42rem;
  border-radius: 999px;
  color: #071611;
  background: #f59e0b;
  font-family: "JetBrains Mono", "Courier New", monospace;
  font-size: 0.62rem;
  font-weight: 900;
}

.interlude-steps strong {
  color: white;
  line-height: 1.25;
}

.interlude-steps p {
  margin: 0;
  color: rgba(255, 255, 255, 0.68);
  font-size: 0.78rem;
  line-height: 1.42;
}

.interlude-steps code {
  align-self: end;
  overflow: hidden;
  padding: 0.38rem 0.48rem;
  border-radius: 10px;
  color: #dfffee;
  background: rgba(0, 0, 0, 0.28);
  font-family: "JetBrains Mono", "Courier New", monospace;
  font-size: 0.62rem;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.interlude-values {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.5rem;
}

.interlude-values section {
  display: grid;
  gap: 0.16rem;
  padding: 0.58rem;
  border: 1px solid rgba(35, 197, 142, 0.14);
  border-radius: 13px;
  background: rgba(35, 197, 142, 0.08);
}

.interlude-values span {
  color: rgba(255, 255, 255, 0.56);
  font-size: 0.58rem;
  text-transform: uppercase;
}

.interlude-values strong {
  overflow: hidden;
  color: #23c58e;
  font-size: 0.76rem;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.animated-board {
  position: relative;
  display: grid;
  grid-template-columns: auto minmax(2rem, 1fr) auto minmax(2rem, 1fr) auto;
  grid-column: 2;
  align-items: center;
  gap: 0.6rem;
  min-height: 10rem;
  padding: 1.1rem;
  overflow: hidden;
  border-radius: 22px;
  color: white;
  background:
    radial-gradient(circle at 35% 45%, rgba(35, 197, 142, 0.18), transparent 11rem),
    #071611;
}

.animated-board::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 1.8rem;
  width: 1rem;
  height: 1rem;
  border-radius: 50%;
  background: #f59e0b;
  box-shadow: 0 0 2rem rgba(245, 158, 11, 0.72);
  animation: boardPacket 4s ease-in-out infinite;
}

.micro-video-studio.is-playing .animated-board::after,
.lesson-video-stage.is-playing .stage-packet {
  animation-duration: 1.8s;
}

.animated-board span,
.animated-board b {
  position: relative;
  z-index: 1;
  display: grid;
  place-items: center;
  min-height: 3rem;
  padding: 0 0.8rem;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.1);
  font-size: 0.72rem;
  text-align: center;
}

.animated-board b {
  grid-column: 1 / -1;
  justify-self: center;
  color: #071611;
  background: #23c58e;
}

.animated-board i {
  height: 0.2rem;
  border-radius: 999px;
  background: linear-gradient(90deg, #23c58e, #f59e0b, #23c58e);
  background-size: 240% 100%;
  animation: flowMove 2.4s linear infinite;
}

.scene-strip {
  display: grid;
  grid-column: 1 / -1;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.65rem;
}

.scene-strip section {
  display: grid;
  align-content: start;
  gap: 0.38rem;
  padding: 0.85rem;
  border: 1px solid rgba(16, 36, 29, 0.1);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.7);
  transition:
    transform 180ms ease,
    border-color 180ms ease,
    background 180ms ease;
}

.scene-strip section.is-active {
  border-color: rgba(15, 143, 104, 0.48);
  background:
    linear-gradient(135deg, rgba(35, 197, 142, 0.14), rgba(255, 255, 255, 0.86));
  transform: translateY(-3px);
}

.scene-strip section.is-done {
  border-color: rgba(35, 197, 142, 0.22);
  background: rgba(35, 197, 142, 0.08);
}

.scene-strip section.is-done span::after {
  content: " tamam";
  color: var(--green);
}

.scene-strip span {
  color: var(--green);
  font-size: 0.68rem;
}

.scene-strip strong {
  color: var(--ink);
}

.scene-strip p {
  margin: 0;
  font-size: 0.82rem;
  line-height: 1.45;
}

.terminal-lab {
  display: grid;
  gap: 0.35rem;
  padding: 1rem;
  border: 1px solid rgba(35, 197, 142, 0.24);
  border-radius: 18px;
  color: #dfffee;
  background: #071611;
  font-family: "JetBrains Mono", "Courier New", monospace;
}

.terminal-lab strong {
  color: white;
}

.terminal-lab small {
  color: #23c58e;
}

.notes-card textarea {
  width: 100%;
  min-height: 8.5rem;
  padding: 1rem;
  border: 1px solid rgba(16, 36, 29, 0.16);
  border-radius: 18px;
  resize: vertical;
  color: var(--ink);
  background: rgba(255, 255, 255, 0.78);
  font: inherit;
}

.lesson-sidebar {
  position: sticky;
  top: 3.95rem;
  align-self: start;
  display: grid;
  grid-template-rows: auto auto auto minmax(0, 1fr);
  max-height: calc(100vh - 3.95rem);
  min-width: 0;
  overflow: hidden;
  border-left: 1px solid rgba(16, 36, 29, 0.14);
  background: #f6f8f4;
}

.lesson-sidebar-head {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem;
  border-bottom: 1px solid rgba(16, 36, 29, 0.1);
}

.lesson-sidebar-head h2 {
  margin: 0.2rem 0 0;
  font-size: 1rem;
}

.lesson-sidebar-head button {
  width: 2.35rem;
  height: 2.35rem;
  border: 1px solid rgba(16, 36, 29, 0.13);
  border-radius: 12px;
  background: white;
  cursor: pointer;
}

.lesson-side-progress {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.85rem;
  align-items: center;
  padding: 1rem;
  border-bottom: 1px solid rgba(16, 36, 29, 0.1);
}

.side-ring {
  display: grid;
  place-items: center;
  width: 5.1rem;
  height: 5.1rem;
  border-radius: 50%;
  background:
    radial-gradient(circle, #f6f8f4 0 47%, transparent 48%),
    conic-gradient(#23c58e var(--side-progress, 0deg), rgba(16, 36, 29, 0.14) 0);
}

.side-ring strong {
  margin-top: 0.7rem;
  color: var(--ink);
  font-size: 1rem;
}

.side-ring span {
  margin-top: -1.05rem;
  color: var(--muted);
  font-size: 0.58rem;
  font-weight: 900;
  text-transform: uppercase;
}

.lesson-side-progress p {
  margin: 0.28rem 0 0;
  color: var(--muted);
  font-size: 0.82rem;
  line-height: 1.5;
}

.lesson-next-card {
  display: grid;
  gap: 0.42rem;
  margin: 1rem;
  padding: 0.92rem;
  border: 1px solid rgba(35, 197, 142, 0.25);
  border-radius: 18px;
  background:
    linear-gradient(135deg, rgba(35, 197, 142, 0.14), rgba(255, 255, 255, 0.82));
}

.lesson-next-card span {
  color: var(--green);
  font-family: "JetBrains Mono", "Courier New", monospace;
  font-size: 0.68rem;
  font-weight: 900;
  text-transform: uppercase;
}

.lesson-next-card strong {
  line-height: 1.35;
}

.lesson-next-card a {
  justify-self: start;
  color: var(--green);
  font-size: 0.82rem;
  font-weight: 900;
}

.lesson-side-list {
  min-height: 0;
  overflow-y: auto;
  border-top: 1px solid rgba(16, 36, 29, 0.1);
}

.lesson-side-item {
  position: relative;
  border-bottom: 1px solid rgba(16, 36, 29, 0.09);
  color: var(--ink);
  background: transparent;
}

.lesson-side-item:hover,
.lesson-side-item:focus-within,
.lesson-side-item.is-current {
  background: rgba(16, 36, 29, 0.06);
}

.lesson-side-link {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 0.45rem 0.7rem;
  align-items: start;
  padding: 0.85rem 1rem 0.68rem;
  color: var(--ink);
}

.lesson-side-link:focus-visible {
  outline: 2px solid rgba(35, 197, 142, 0.65);
  outline-offset: -2px;
}

.lesson-side-item.is-current::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.7rem;
  bottom: 0.7rem;
  width: 0.28rem;
  border-radius: 0 999px 999px 0;
  background: #23c58e;
}

.lesson-side-number {
  display: grid;
  place-items: center;
  width: 1.7rem;
  height: 1.7rem;
  border-radius: 50%;
  color: white;
  background: var(--ink);
  font-family: "JetBrains Mono", "Courier New", monospace;
  font-size: 0.68rem;
  font-weight: 900;
}

.lesson-side-copy {
  display: grid;
  gap: 0.22rem;
  min-width: 0;
}

.lesson-side-copy strong {
  min-width: 0;
  line-height: 1.28;
}

.lesson-side-copy small {
  color: var(--muted);
  line-height: 1.4;
}

.lesson-side-compact {
  display: grid;
  grid-column: 2 / -1;
  grid-template-columns: minmax(0, 1fr) auto auto;
  gap: 0.45rem;
  align-items: center;
  padding-top: 0.18rem;
}

.lesson-side-compact span {
  position: relative;
  overflow: hidden;
  height: 0.32rem;
  border-radius: 999px;
  background: rgba(16, 36, 29, 0.1);
}

.lesson-side-compact span i {
  position: absolute;
  inset: 0 auto 0 0;
  width: var(--lesson-step-progress, 0%);
  border-radius: inherit;
  background: linear-gradient(90deg, #23c58e, #f59e0b);
}

.lesson-side-compact b,
.lesson-side-compact small {
  font-family: "JetBrains Mono", "Courier New", monospace;
  font-size: 0.58rem;
  font-weight: 900;
  text-transform: uppercase;
}

.lesson-side-compact b {
  color: var(--green);
}

.lesson-side-compact small {
  padding: 0.12rem 0.36rem;
  border-radius: 999px;
  color: var(--muted);
  background: rgba(16, 36, 29, 0.07);
}

.lesson-side-item em {
  padding: 0.18rem 0.42rem;
  border-radius: 999px;
  color: var(--muted);
  background: rgba(16, 36, 29, 0.07);
  font-family: "JetBrains Mono", "Courier New", monospace;
  font-size: 0.58rem;
  font-style: normal;
  font-weight: 900;
  text-transform: uppercase;
}

.lesson-side-item.is-complete .lesson-side-number,
.lesson-side-item.is-complete em {
  color: #071611;
  background: #23c58e;
}

.lesson-side-item.is-locked {
  opacity: 0.58;
}

.lesson-side-item.is-locked .lesson-side-number {
  background: #8a928d;
}

.lesson-step-mini {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 0.45rem;
  align-items: center;
  padding: 0 1rem 0.75rem 3.4rem;
}

.lesson-step-mini span,
.lesson-step-progress span {
  position: relative;
  overflow: hidden;
  height: 0.36rem;
  border-radius: 999px;
  background: rgba(16, 36, 29, 0.1);
}

.lesson-step-mini span::before,
.lesson-step-progress i {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: var(--lesson-step-progress, 0%);
  border-radius: inherit;
  background: linear-gradient(90deg, #23c58e, #f59e0b);
}

.lesson-step-mini b {
  color: var(--muted);
  font-family: "JetBrains Mono", "Courier New", monospace;
  font-size: 0.62rem;
  text-transform: uppercase;
}

.lesson-step-panel {
  display: grid;
  gap: 0.6rem;
  padding: 0 1rem 0.95rem 3.4rem;
}

.lesson-step-progress {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 0.55rem;
  align-items: center;
}

.lesson-step-progress strong,
.lesson-step-progress em {
  color: var(--green);
  font-family: "JetBrains Mono", "Courier New", monospace;
  font-size: 0.65rem;
  font-style: normal;
  font-weight: 900;
  text-transform: uppercase;
}

.lesson-step-list {
  display: grid;
  gap: 0.45rem;
}

.lesson-step-toggle {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.55rem;
  align-items: start;
  width: 100%;
  padding: 0.55rem;
  border: 1px solid rgba(16, 36, 29, 0.12);
  border-radius: 14px;
  color: var(--ink);
  background: rgba(255, 255, 255, 0.58);
  cursor: pointer;
  text-align: left;
  transition:
    border-color 180ms ease,
    background 180ms ease,
    transform 180ms ease;
}

.lesson-step-toggle:hover,
.lesson-step-toggle:focus-visible {
  border-color: rgba(35, 197, 142, 0.45);
  background: white;
  transform: translateY(-1px);
  outline: none;
}

.lesson-step-toggle:disabled {
  cursor: default;
  transform: none;
}

.step-tick {
  display: grid;
  place-items: center;
  width: 1.12rem;
  height: 1.12rem;
  margin-top: 0.1rem;
  border: 1px solid rgba(16, 36, 29, 0.2);
  border-radius: 50%;
  color: #071611;
  background: white;
  font-size: 0.72rem;
  font-weight: 900;
}

.lesson-step-toggle.is-checked {
  border-color: rgba(35, 197, 142, 0.38);
  background: linear-gradient(135deg, rgba(35, 197, 142, 0.16), rgba(255, 255, 255, 0.78));
}

.lesson-step-toggle.is-checked .step-tick {
  border-color: #23c58e;
  background: #23c58e;
}

.step-copy {
  display: grid;
  gap: 0.2rem;
  min-width: 0;
}

.step-copy b {
  font-size: 0.78rem;
  line-height: 1.25;
}

.step-copy small {
  color: var(--muted);
  font-size: 0.72rem;
  line-height: 1.35;
}

@keyframes playerOrbit {
  to {
    transform: rotate(360deg);
  }
}

@keyframes playerTimeline {
  0%,
  100% {
    transform: translateX(0);
  }

  50% {
    transform: translateX(340%);
  }
}

@keyframes flowMove {
  to {
    background-position: -220% 0;
  }
}

@keyframes packetTravel {
  0%,
  100% {
    transform: translateX(-8rem) translateY(0);
  }

  50% {
    transform: translateX(8rem) translateY(1.1rem);
  }
}

@keyframes boardPacket {
  0%,
  100% {
    left: 1.8rem;
    transform: translateY(-50%);
  }

  50% {
    left: calc(100% - 2.8rem);
    transform: translateY(-50%);
  }
}

@keyframes visualPacket {
  0%,
  100% {
    left: 8%;
    transform: translateY(-50%) scale(0.88);
  }

  48% {
    left: 50%;
    transform: translateY(-50%) scale(1.12);
  }

  78% {
    left: 84%;
    transform: translateY(-50%) scale(0.95);
  }
}

@keyframes visualRailPulse {
  0%,
  100% {
    border-color: rgba(255, 255, 255, 0.11);
    transform: translateY(0);
  }

  45% {
    border-color: rgba(35, 197, 142, 0.38);
    transform: translateY(-2px);
  }
}

@keyframes cursorBlink {
  0%,
  45% {
    opacity: 1;
  }

  46%,
  100% {
    opacity: 0.2;
  }
}

@keyframes visualBars {
  from {
    opacity: 0.35;
    transform: scaleY(0.55);
  }

  to {
    opacity: 1;
    transform: scaleY(1.18);
  }
}

@keyframes interludeTimeline {
  from {
    transform: scaleX(0);
  }

  to {
    transform: scaleX(1);
  }
}

@keyframes interludeStep {
  0%,
  22% {
    opacity: 1;
    border-color: rgba(35, 197, 142, 0.45);
    background: rgba(35, 197, 142, 0.14);
    box-shadow: 0 0 1.6rem rgba(35, 197, 142, 0.16);
    transform: translateY(-3px);
  }

  30%,
  100% {
    opacity: 0.42;
    border-color: rgba(255, 255, 255, 0.09);
    background: rgba(255, 255, 255, 0.06);
    box-shadow: none;
    transform: translateY(0);
  }
}

@media (max-width: 1180px) {
  .lesson-player-shell {
    grid-template-columns: minmax(0, 1fr);
  }

  .lesson-sidebar {
    position: relative;
    top: auto;
    max-height: none;
    border-left: 0;
    border-top: 1px solid rgba(16, 36, 29, 0.12);
  }

  .lesson-side-list {
    max-height: 32rem;
  }

  .lesson-player-page {
    background: #10141f;
  }
}

@media (max-width: 760px) {
  .lesson-player-topbar {
    grid-template-columns: 1fr;
    align-items: stretch;
  }

  .player-course-title {
    padding-left: 0;
    border-left: 0;
  }

  .player-actions {
    overflow-x: auto;
    padding-bottom: 0.1rem;
  }

  .lesson-video-stage {
    min-height: 28rem;
    padding: 1rem;
  }

  .lesson-start-hero,
  .lesson-hero-map,
  .visual-studio-head,
  .visual-studio-grid,
  .visual-code-editor,
  .visual-directory-console,
  .visual-web-lab,
  .teacher-section,
  .teacher-step-plan,
  .lab-sim-shell {
    grid-template-columns: 1fr;
  }

  .visual-hero,
  .visual-step-section .visual-mockup {
    min-height: 22rem;
  }

  .visual-topology-map,
  .visual-cloud-iam,
  .visual-forensics,
  .visual-k8s-board {
    grid-template-columns: 1fr;
  }

  .visual-cable {
    width: 0.24rem;
    min-height: 2.4rem;
    justify-self: center;
  }

  .stage-caption {
    left: 1rem;
    right: 1rem;
    bottom: 1.1rem;
  }

  .stage-micro-lesson {
    inset: 1rem 1rem auto 1rem;
    width: auto;
  }

  .stage-concept-line {
    display: none;
  }

  .lesson-play-button {
    width: 5.6rem;
    height: 5.6rem;
  }

  .player-study-grid,
  .micro-video-studio,
  .interlude-card,
  .lesson-side-progress {
    grid-template-columns: 1fr;
  }

  .pro-video-screen {
    grid-column: auto;
  }

  .screen-map,
  .animated-board,
  .interlude-flow {
    grid-column: auto;
    grid-template-columns: 1fr;
  }

  .screen-map i,
  .animated-board i,
  .interlude-flow i {
    width: 0.2rem;
    min-height: 2.4rem;
    justify-self: center;
  }

  .screen-values,
  .interlude-values,
  .visual-value-strip,
  .visual-dashboard-grid,
  .lesson-outcomes,
  .primer-grid,
  .lesson-roadmap-card ol,
  .inline-options,
  .console-values {
    grid-template-columns: 1fr 1fr;
  }

  .scene-strip,
  .interlude-steps {
    grid-template-columns: 1fr;
  }

  .flow-animation {
    grid-template-columns: 1fr;
  }

  .flow-animation i {
    min-height: 2.5rem;
    width: 0.22rem;
    justify-self: center;
  }

  .lesson-hero-map i {
    width: 0.2rem;
    min-height: 2.4rem;
    justify-self: center;
  }
}

@media (max-width: 980px) {
  .quiz-options {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .primer-grid,
  .lesson-outcomes,
  .lesson-roadmap-card ol,
  .inline-options,
  .console-values,
  .visual-value-strip,
  .visual-dashboard-grid {
    grid-template-columns: 1fr;
  }

  .lesson-side-compact {
    grid-column: 1 / -1;
  }

  .quiz-shell {
    width: min(100% - 1rem, 1120px);
  }

  .quiz-course-link {
    position: static;
  }

  .quiz-options {
    grid-template-columns: 1fr;
  }

  .quiz-option {
    grid-template-columns: auto auto minmax(0, 1fr);
  }

  .lesson-outcomes,
  .lesson-roadmap-card ol,
  .inline-options,
  .console-values,
  .screen-values,
  .interlude-values {
    grid-template-columns: 1fr;
  }
}

/* Readability pass: keep the cyber mood, but make long Turkish content easier to scan. */
:root {
  --font-sans: "Manrope", "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  --font-display: "Manrope", "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  --font-mono: "JetBrains Mono", "SFMono-Regular", Consolas, monospace;
}

body,
button,
input,
textarea,
select,
.lesson-card,
.lesson-preview-button,
.course-command,
.player-card,
.quiz-question,
.auth-card,
.bt-focus-grid {
  font-family: var(--font-sans) !important;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

h1,
h2,
h3,
.course-command h1,
.section-heading h2,
.auth-card h2,
.my-library-panel h2,
.player-card h2,
.visual-studio-head h2,
.teacher-copy h2,
.stage-caption h1,
.quiz-hero-card h1,
.lesson-start-hero .stage-caption h1 {
  font-family: var(--font-display) !important;
  font-weight: 850;
  letter-spacing: -0.045em;
}

h1 {
  font-size: clamp(2.4rem, 5vw, 4.2rem);
  line-height: 1.04;
}

h2,
.section-heading h2 {
  font-size: clamp(1.8rem, 3.2vw, 2.9rem);
  line-height: 1.08;
}

h3 {
  line-height: 1.28;
}

p,
li,
small,
.course-command > p:not(.eyebrow):not(.course-content-title),
.lesson-preview-button small,
.player-card p,
.player-card li,
.quiz-question legend em {
  line-height: 1.62;
}

.eyebrow,
.course-content-title,
.lesson-meta,
.lesson-lock,
.lesson-number,
.lesson-tags em,
.open-lesson,
.solve-test,
.complete-lesson,
.button,
.course-content-strip span,
.bt-focus-grid span,
.quiz-number,
.quiz-option b {
  font-family: var(--font-sans) !important;
  letter-spacing: 0.01em;
}

.brand,
code,
pre,
.stage-console span,
.visual-window-top em,
.visual-terminal-screen,
.visual-code-editor,
.visual-db-console,
.mission-simulator code,
.lab-sim-output pre,
.lab-sim-output section,
.quiz-option em {
  font-family: var(--font-mono) !important;
}

.course-command h1 {
  font-size: clamp(2rem, 4vw, 3.35rem);
  line-height: 1.08;
  letter-spacing: -0.05em;
}

.course-command > p:not(.eyebrow):not(.course-content-title) {
  color: #4e6259;
  font-size: 1rem;
  font-weight: 500;
}

.section-heading {
  max-width: 920px;
}

.section-heading p:not(.eyebrow) {
  max-width: 760px;
  color: #5c7067;
  font-size: 1rem;
}

.lesson-preview-button strong {
  color: #061a14;
  font-size: 1rem;
  font-weight: 850;
  line-height: 1.32;
  letter-spacing: -0.02em;
}

.lesson-preview-button small {
  color: #5b6f66;
  font-size: 0.88rem;
  font-weight: 500;
}

.lesson-meta {
  color: #007b65;
  font-size: 0.74rem;
  font-weight: 850;
  text-transform: uppercase;
}

.lesson-lock,
.lesson-tags em,
.solve-test span {
  font-size: 0.72rem;
  font-weight: 800;
}

.button,
.open-lesson,
.solve-test,
.complete-lesson {
  font-weight: 850;
}

.quiz-question legend strong,
.inline-check strong,
.teacher-copy strong {
  letter-spacing: -0.02em;
}

@media (max-width: 700px) {
  h1,
  .course-command h1,
  .stage-caption h1 {
    letter-spacing: -0.035em;
  }

  .lesson-preview-button strong {
    font-size: 0.96rem;
  }
}

/* Lesson clarity pass: compact, readable lesson screens with less visual fatigue. */
.visual-studio-card {
  gap: 1rem;
  overflow: hidden;
  border-color: rgba(16, 36, 29, 0.12);
  color: var(--ink);
  background:
    radial-gradient(circle at 0 0, rgba(35, 197, 142, 0.1), transparent 20rem),
    linear-gradient(135deg, rgba(255, 255, 255, 0.94), rgba(246, 249, 244, 0.92));
  box-shadow: 0 1rem 2.3rem rgba(16, 36, 29, 0.08);
}

.visual-studio-head {
  grid-template-columns: minmax(0, 1fr) minmax(12rem, auto);
  align-items: start;
}

.visual-studio-head .eyebrow {
  margin-bottom: 0.55rem;
}

.visual-studio-head h2 {
  max-width: 720px;
  margin-bottom: 0.55rem;
  color: #071611;
  font-size: clamp(1.65rem, 3vw, 2.7rem) !important;
  line-height: 1.08;
  letter-spacing: -0.04em;
}

.visual-studio-head p {
  max-width: 860px;
  margin: 0;
  color: #52665d;
  font-size: 0.98rem;
  font-weight: 500;
  line-height: 1.62;
}

.visual-studio-head > span {
  max-width: 360px;
  border-color: rgba(15, 143, 104, 0.18);
  color: #063d31;
  background: rgba(35, 197, 142, 0.16);
  font-family: var(--font-sans) !important;
  font-size: 0.76rem;
  line-height: 1.35;
  white-space: normal;
}

.visual-studio-grid {
  grid-template-columns: minmax(0, 0.95fr) minmax(17rem, 0.72fr);
  gap: 0.85rem;
  align-items: start;
}

.visual-mockup {
  min-height: 16rem;
  border-radius: 18px;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.04), 0 0.8rem 1.7rem rgba(0, 0, 0, 0.13);
}

.visual-hero {
  min-height: clamp(16.5rem, 24vw, 22rem);
}

.visual-window-top {
  padding: 0.58rem 0.72rem;
}

.visual-window-top strong {
  font-size: 0.72rem;
}

.visual-story-rail {
  gap: 0.55rem;
}

.visual-story-rail section {
  min-height: 0;
  padding: 0.78rem;
  border-color: rgba(16, 36, 29, 0.1);
  background: rgba(255, 255, 255, 0.78);
  animation: none;
}

.visual-story-rail span {
  width: 1.55rem;
  height: 1.55rem;
  color: #063d31;
  background: rgba(35, 197, 142, 0.18);
  font-family: var(--font-sans) !important;
}

.visual-story-rail strong {
  color: #11231c;
  font-size: 0.94rem;
  line-height: 1.24;
}

.visual-story-rail small {
  color: #66776f;
  font-size: 0.82rem;
  line-height: 1.42;
}

.visual-value-strip {
  padding: 0.55rem;
}

.visual-value-strip span {
  padding: 0.48rem 0.58rem;
  font-size: 0.72rem;
}

.visual-dashboard-grid,
.visual-directory-console,
.visual-web-lab,
.visual-policy-table,
.visual-cloud-iam,
.visual-mail-trace,
.visual-forensics,
.visual-db-console,
.visual-k8s-board,
.visual-topology-map,
.visual-terminal-screen,
.visual-code-editor {
  min-height: 0;
}

.visual-step-section .visual-mockup {
  min-height: 17rem;
}

.teacher-flow {
  gap: 0.85rem;
}

.teacher-section {
  grid-template-columns: minmax(18rem, 0.82fr) minmax(0, 1fr);
  gap: 0.85rem;
  padding: 1rem;
  border-radius: 20px;
  box-shadow: 0 0.75rem 1.8rem rgba(16, 36, 29, 0.07);
}

.teacher-copy h2 {
  font-size: clamp(1.35rem, 2.2vw, 1.9rem) !important;
}

.teacher-copy > p:not(.eyebrow) {
  -webkit-line-clamp: 3;
}

.teacher-step-plan {
  gap: 0.5rem;
  margin-top: 0.75rem;
}

.teacher-step-plan section,
.teacher-copy li,
.inline-check,
.lab-simulator-card,
.lesson-intro-card,
.lesson-roadmap-card,
.beginner-primer-card,
.quick-summary-card,
.quiz-card,
.notes-card {
  border-radius: 16px;
}

.lesson-intro-card,
.lesson-roadmap-card,
.beginner-primer-card,
.quick-summary-card,
.quiz-card,
.notes-card,
.lab-simulator-card {
  padding: 1rem;
  box-shadow: 0 0.75rem 1.8rem rgba(16, 36, 29, 0.06);
}

.lesson-outcomes,
.lesson-roadmap-card ol,
.primer-grid {
  gap: 0.65rem;
}

.lesson-outcomes section,
.lesson-roadmap-card li,
.primer-grid section {
  padding: 0.8rem;
  border-radius: 15px;
}

@media (max-width: 1040px) {
  .visual-studio-head,
  .visual-studio-grid,
  .teacher-section {
    grid-template-columns: 1fr;
  }

  .visual-studio-head > span {
    max-width: none;
    justify-self: start;
  }
}

@media (max-width: 700px) {
  .visual-studio-card,
  .teacher-section,
  .lesson-intro-card,
  .lesson-roadmap-card,
  .beginner-primer-card,
  .quick-summary-card,
  .quiz-card,
  .notes-card,
  .lab-simulator-card {
    padding: 0.85rem;
  }

  .visual-hero,
  .visual-mockup,
  .visual-step-section .visual-mockup {
    min-height: 14.5rem;
  }
}

/* Lesson companion sidebar: keeps the right side useful while the student scrolls. */
.lesson-player-page {
  background: #10141f !important;
}

.lesson-player-shell {
  grid-template-columns: minmax(0, 1fr) clamp(20rem, 22vw, 25rem);
  align-items: start;
}

.lesson-sidebar {
  top: 3.95rem;
  height: calc(100vh - 3.95rem);
  max-height: calc(100vh - 3.95rem);
  gap: 0.68rem;
  padding: 0.72rem;
  border-left: 1px solid rgba(16, 36, 29, 0.12);
  background:
    radial-gradient(circle at 18% 0, rgba(35, 197, 142, 0.13), transparent 17rem),
    linear-gradient(180deg, #f8faf6, #eef4ed);
  box-shadow: -1.1rem 0 2.8rem rgba(7, 22, 17, 0.08);
}

.lesson-sidebar-head,
.lesson-side-progress,
.lesson-next-card {
  border: 1px solid rgba(16, 36, 29, 0.12);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.78);
  box-shadow: 0 0.75rem 1.8rem rgba(16, 36, 29, 0.06);
}

.lesson-sidebar-head {
  padding: 0.78rem 0.82rem;
  border-bottom: 1px solid rgba(16, 36, 29, 0.12);
}

.lesson-sidebar-head h2 {
  font-size: 0.96rem;
  line-height: 1.22;
}

.lesson-sidebar-head button {
  flex: 0 0 auto;
  width: 2.05rem;
  height: 2.05rem;
}

.lesson-side-progress {
  padding: 0.72rem;
  border-bottom: 1px solid rgba(16, 36, 29, 0.1);
}

.side-ring {
  width: 4.1rem;
  height: 4.1rem;
}

.side-ring strong {
  margin-top: 0.6rem;
  font-size: 0.86rem;
}

.side-ring span {
  margin-top: -0.86rem;
  font-size: 0.5rem;
}

.lesson-side-progress strong,
.lesson-side-progress p {
  font-size: 0.78rem;
  line-height: 1.42;
}

.lesson-next-card {
  margin: 0;
  padding: 0.86rem;
  background:
    linear-gradient(135deg, rgba(35, 197, 142, 0.16), rgba(255, 255, 255, 0.86)),
    radial-gradient(circle at 100% 0, rgba(245, 158, 11, 0.18), transparent 10rem);
}

.lesson-next-card span,
.lesson-side-list-title {
  color: #007b65;
  font-family: var(--font-sans) !important;
  font-size: 0.68rem;
  font-weight: 900;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.lesson-next-card strong {
  color: #071611;
  font-size: 0.98rem;
  line-height: 1.28;
  letter-spacing: -0.02em;
}

.lesson-next-card p,
.lesson-next-card small {
  margin: 0;
  color: #5b6f66;
  font-size: 0.78rem;
  line-height: 1.45;
}

.lesson-companion-actions {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.42rem;
}

.lesson-companion-actions a,
.lesson-next-card .lesson-next-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.05rem;
  padding: 0.45rem 0.55rem;
  border: 1px solid rgba(16, 36, 29, 0.12);
  border-radius: 999px;
  color: #071611;
  background: rgba(255, 255, 255, 0.72);
  font-size: 0.72rem;
  font-weight: 850;
  text-align: center;
}

.lesson-companion-actions a:hover,
.lesson-next-card .lesson-next-action:hover {
  border-color: rgba(35, 197, 142, 0.45);
  background: rgba(35, 197, 142, 0.14);
}

.lesson-next-card .lesson-next-action {
  justify-self: stretch;
  border-color: rgba(16, 36, 29, 0.72);
  color: white;
  background: #071611;
}

.lesson-side-list {
  display: grid;
  align-content: start;
  gap: 0.42rem;
  min-height: 0;
  padding: 0 0.05rem 0.78rem;
  overflow-y: auto;
  border-top: 0;
  scrollbar-color: rgba(16, 36, 29, 0.28) transparent;
  scrollbar-width: thin;
}

.lesson-side-list-title {
  position: sticky;
  top: 0;
  z-index: 2;
  margin: 0;
  padding: 0.38rem 0.28rem 0.16rem;
  background: linear-gradient(180deg, #f4f8f2 0 76%, rgba(244, 248, 242, 0));
}

.lesson-side-item {
  overflow: hidden;
  border: 1px solid rgba(16, 36, 29, 0.1);
  border-radius: 15px;
  background: rgba(255, 255, 255, 0.74);
}

.lesson-side-item + .lesson-side-item {
  border-top: 1px solid rgba(16, 36, 29, 0.1);
}

.lesson-side-item:hover,
.lesson-side-item:focus-within {
  background: rgba(255, 255, 255, 0.94);
}

.lesson-side-item.is-current {
  border-color: rgba(35, 197, 142, 0.48);
  background: rgba(35, 197, 142, 0.1);
  box-shadow: inset 0.25rem 0 0 #23c58e;
}

.lesson-side-item.is-current::before {
  display: none;
}

.lesson-side-link {
  grid-template-columns: auto minmax(0, 1fr) auto;
  padding: 0.66rem;
}

.lesson-side-number {
  width: 1.52rem;
  height: 1.52rem;
  font-size: 0.62rem;
}

.lesson-side-copy strong {
  display: -webkit-box;
  overflow: hidden;
  color: #071611;
  font-size: 0.84rem;
  line-height: 1.24;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
}

.lesson-side-copy small {
  display: -webkit-box;
  overflow: hidden;
  font-size: 0.72rem;
  line-height: 1.34;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
}

.lesson-side-link em {
  align-self: start;
  padding: 0.14rem 0.4rem;
  border-radius: 999px;
  color: #476158;
  background: rgba(16, 36, 29, 0.06);
  font-size: 0.56rem;
}

.lesson-side-item.is-current .lesson-side-link em {
  color: #064838;
  background: rgba(35, 197, 142, 0.18);
}

.lesson-side-compact {
  grid-column: 1 / -1;
  grid-template-columns: minmax(0, 1fr) auto auto;
  margin-left: 2.18rem;
  padding-top: 0;
}

.lesson-player-content [id],
.lesson-player-tabs,
.visual-studio-card,
.teacher-section,
.lab-simulator-card,
.quick-summary-card,
.quiz-card,
.notes-card {
  scroll-margin-top: 5.2rem;
}

@media (min-width: 1021px) {
  .lesson-player-shell {
    grid-template-columns: minmax(0, 1fr) clamp(20rem, 22vw, 25rem) !important;
  }

  .lesson-sidebar {
    position: sticky !important;
    top: 3.95rem !important;
    height: calc(100vh - 3.95rem) !important;
    max-height: calc(100vh - 3.95rem) !important;
    border-top: 0 !important;
  }

  .lesson-side-list {
    max-height: none !important;
  }
}

@media (max-width: 1020px) {
  .lesson-player-shell {
    grid-template-columns: minmax(0, 1fr);
  }

  .lesson-sidebar {
    position: relative;
    top: auto;
    height: auto;
    max-height: none;
  }

  .lesson-side-list {
    max-height: 30rem;
  }
}

/* Strong compact sizing for lesson visuals. */
.visual-mockup {
  min-height: 0 !important;
}

.visual-hero {
  height: clamp(15rem, 24vw, 22rem) !important;
  min-height: 0 !important;
}

.visual-step-section .visual-mockup {
  height: clamp(14rem, 20vw, 18rem) !important;
  min-height: 0 !important;
}

.visual-terminal-screen,
.visual-code-editor,
.visual-directory-console,
.visual-web-lab,
.visual-policy-table,
.visual-cloud-iam,
.visual-mail-trace,
.visual-forensics,
.visual-risk-grid,
.visual-db-console,
.visual-k8s-board,
.visual-dashboard-grid {
  min-height: 9.5rem !important;
  margin: 0.65rem !important;
}

.visual-topology-map {
  padding: clamp(0.75rem, 2vw, 1.2rem) !important;
}

.visual-node {
  min-height: 5.2rem !important;
  padding: 0.75rem !important;
  border-radius: 16px !important;
}

.visual-node::before {
  width: 2rem !important;
  height: 1.55rem !important;
}

.visual-dashboard-grid {
  grid-auto-rows: minmax(3rem, auto);
}

.visual-dashboard-grid .metric,
.visual-dashboard-grid .chart,
.visual-dashboard-grid .logline {
  border-radius: 14px;
}

.visual-dashboard-grid .metric {
  padding: 0.65rem;
}

.visual-dashboard-grid .metric strong {
  font-size: 1rem;
}

.visual-story-rail section {
  max-height: none;
}

@media (max-width: 700px) {
  .visual-hero,
  .visual-step-section .visual-mockup {
    height: 13.5rem !important;
  }

  .visual-terminal-screen,
  .visual-code-editor,
  .visual-directory-console,
  .visual-web-lab,
  .visual-policy-table,
  .visual-cloud-iam,
  .visual-mail-trace,
  .visual-forensics,
  .visual-risk-grid,
  .visual-db-console,
  .visual-k8s-board,
  .visual-dashboard-grid {
    min-height: 8.5rem !important;
  }
}

/* Auth landing: single-screen CyberOptic gate. */
.auth-landing-page {
  min-height: 100svh;
  overflow: hidden;
  color: #071611;
  background:
    radial-gradient(circle at 16% 18%, rgba(35, 197, 142, 0.18), transparent 26rem),
    radial-gradient(circle at 88% 20%, rgba(245, 158, 11, 0.14), transparent 24rem),
    linear-gradient(135deg, #f7faf3 0%, #eef6f0 48%, #dfe9df 100%);
  font-family: var(--font-sans, "Manrope", sans-serif);
}

.auth-landing-page::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(rgba(16, 36, 29, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(16, 36, 29, 0.035) 1px, transparent 1px);
  background-size: 38px 38px;
  mask-image: linear-gradient(90deg, rgba(0, 0, 0, 0.92), rgba(0, 0, 0, 0.35));
}

.auth-nav {
  position: relative;
  z-index: 5;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: center;
  gap: 1rem;
  height: 4.35rem;
  padding: 0.75rem clamp(1rem, 4vw, 3.2rem);
  border-bottom: 1px solid rgba(16, 36, 29, 0.1);
  background: rgba(250, 252, 247, 0.82);
  backdrop-filter: blur(18px);
}

.auth-brand {
  font-family: var(--font-mono, "JetBrains Mono", monospace) !important;
}

.auth-nav nav {
  justify-self: end;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.auth-nav a:not(.brand),
.auth-nav button {
  min-height: 2.45rem;
  padding: 0.62rem 0.82rem;
  border: 1px solid rgba(16, 36, 29, 0.13);
  border-radius: 999px;
  color: #10241d;
  background: rgba(255, 255, 255, 0.72);
  font-size: 0.82rem;
  font-weight: 850;
  cursor: pointer;
}

.auth-nav .auth-nav-primary,
.auth-nav button.is-active {
  border-color: #071611;
  color: white;
  background: #071611;
}

.auth-landing {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(23rem, 29rem);
  gap: clamp(1rem, 4vw, 3.5rem);
  align-items: center;
  width: min(1220px, calc(100% - 2rem));
  min-height: calc(100svh - 4.35rem);
  margin: 0 auto;
  padding: clamp(1rem, 3vw, 2.6rem) 0;
}

.auth-hero-block {
  display: grid;
  gap: 1.2rem;
  max-width: 48rem;
}

.auth-hero-block .eyebrow {
  margin: 0;
  color: #007b65;
  font-size: 0.78rem;
  letter-spacing: 0.06em;
}

.auth-hero-block h1 {
  max-width: 760px;
  margin: 0;
  color: #071611;
  font-family: var(--font-display, "Manrope", sans-serif) !important;
  font-size: clamp(2.7rem, 6vw, 5.7rem);
  font-weight: 900;
  line-height: 0.95;
  letter-spacing: -0.075em;
}

.auth-hero-copy {
  max-width: 680px;
  margin: 0;
  color: #4e6259;
  font-size: clamp(1rem, 1.5vw, 1.14rem);
  font-weight: 560;
  line-height: 1.68;
}

.auth-proof-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.72rem;
  max-width: 620px;
}

.auth-proof-grid article,
.auth-system-card {
  border: 1px solid rgba(16, 36, 29, 0.12);
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.62);
  box-shadow: 0 1rem 2.5rem rgba(16, 36, 29, 0.08);
}

.auth-proof-grid article {
  padding: 0.95rem;
}

.auth-proof-grid strong {
  display: block;
  color: #071611;
  font-size: 1.8rem;
  font-weight: 900;
  letter-spacing: -0.04em;
}

.auth-proof-grid span {
  color: #5b6f66;
  font-size: 0.82rem;
  font-weight: 800;
}

.auth-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
}

.auth-system-card {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.25rem 0.9rem;
  align-items: center;
  max-width: 520px;
  padding: 0.88rem;
}

.auth-system-card span,
.auth-system-card small {
  color: #007b65;
  font-family: var(--font-mono, "JetBrains Mono", monospace);
  font-size: 0.72rem;
  font-weight: 900;
  text-transform: uppercase;
}

.auth-system-card strong {
  color: #10241d;
  font-size: 0.98rem;
}

.auth-system-card i {
  grid-column: 1 / -1;
  height: 0.4rem;
  overflow: hidden;
  border-radius: 999px;
  background: linear-gradient(90deg, #23c58e 0 34%, #f59e0b 34% 62%, #071611 62% 100%);
}

.auth-panel {
  display: grid;
  gap: 0.9rem;
}

.auth-illustration {
  position: relative;
  min-height: 12rem;
  overflow: hidden;
  border: 1px solid rgba(16, 36, 29, 0.13);
  border-radius: 30px;
  background:
    radial-gradient(circle at 50% 42%, rgba(35, 197, 142, 0.28), transparent 7rem),
    linear-gradient(135deg, #071611, #17251f);
  box-shadow: 0 1.4rem 3.2rem rgba(7, 22, 17, 0.22);
}

.auth-orbit {
  position: absolute;
  inset: 1.4rem;
  border: 1px dashed rgba(35, 197, 142, 0.38);
  border-radius: 50%;
  animation: authOrbit 12s linear infinite;
}

.auth-orbit span {
  position: absolute;
  width: 0.82rem;
  height: 0.82rem;
  border-radius: 50%;
  background: #23c58e;
  box-shadow: 0 0 1.6rem rgba(35, 197, 142, 0.7);
}

.auth-orbit span:nth-child(1) { left: 12%; top: 18%; }
.auth-orbit span:nth-child(2) { right: 18%; top: 34%; background: #f59e0b; }
.auth-orbit span:nth-child(3) { left: 48%; bottom: 8%; background: white; }

.auth-terminal,
.auth-envelope {
  position: absolute;
  border: 1px solid rgba(255, 255, 255, 0.13);
  border-radius: 18px;
  color: white;
  background: rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(14px);
}

.auth-terminal {
  left: 1.1rem;
  bottom: 1.1rem;
  width: 62%;
  padding: 0.9rem;
}

.auth-terminal b {
  display: inline-block;
  width: 0.48rem;
  height: 0.48rem;
  margin-right: 0.25rem;
  border-radius: 50%;
  background: #23c58e;
}

.auth-terminal strong,
.auth-terminal code {
  display: block;
  margin-top: 0.55rem;
}

.auth-terminal code {
  color: rgba(255, 255, 255, 0.72);
  font-family: var(--font-mono, "JetBrains Mono", monospace);
  font-size: 0.72rem;
}

.auth-envelope {
  right: 1rem;
  top: 1rem;
  display: grid;
  place-items: center;
  width: 8rem;
  min-height: 4.6rem;
  padding: 0.75rem;
  text-align: center;
}

.auth-envelope i {
  width: 3.2rem;
  height: 2.1rem;
  border: 2px solid #23c58e;
  border-radius: 9px;
  background: linear-gradient(135deg, transparent 46%, rgba(35, 197, 142, 0.35) 47% 52%, transparent 53%);
}

.auth-envelope strong {
  color: #d9fff0;
  font-size: 0.78rem;
}

.auth-card-modern {
  padding: clamp(1rem, 2vw, 1.35rem);
  border: 1px solid rgba(16, 36, 29, 0.13);
  border-radius: 28px;
  background: rgba(255, 255, 255, 0.86);
  box-shadow: 0 1.4rem 3.2rem rgba(16, 36, 29, 0.14);
  backdrop-filter: blur(16px);
}

.auth-tabs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.45rem;
  margin-bottom: 1rem;
  padding: 0.35rem;
  border-radius: 999px;
  background: rgba(16, 36, 29, 0.06);
}

.auth-tabs button {
  min-height: 2.55rem;
  border: 0;
  border-radius: inherit;
  color: #5b6f66;
  background: transparent;
  font-weight: 900;
  cursor: pointer;
}

.auth-tabs button.is-active {
  color: white;
  background: #071611;
}

.auth-view {
  display: grid;
  gap: 0.78rem;
}

.auth-view[hidden] {
  display: none !important;
}

.auth-view h2 {
  margin: 0;
  color: #071611;
  font-family: var(--font-display, "Manrope", sans-serif) !important;
  font-size: clamp(1.55rem, 2.4vw, 2.05rem);
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: -0.045em;
}

.auth-view p,
.auth-view small {
  margin: 0;
  color: #5b6f66;
  font-size: 0.88rem;
  line-height: 1.52;
}

.auth-view label {
  display: grid;
  gap: 0.42rem;
  color: #10241d;
  font-size: 0.82rem;
  font-weight: 900;
}

.auth-view input {
  width: 100%;
  min-height: 3.15rem;
  padding: 0 0.95rem;
  border: 1px solid rgba(16, 36, 29, 0.18);
  border-radius: 14px;
  color: #071611;
  background: rgba(255, 255, 255, 0.9);
  font: inherit;
  font-weight: 700;
  outline: none;
}

.auth-view input:focus {
  border-color: rgba(35, 197, 142, 0.78);
  box-shadow: 0 0 0 4px rgba(35, 197, 142, 0.12);
}

.auth-link-button {
  justify-self: start;
  padding: 0;
  border: 0;
  color: #007b65;
  background: transparent;
  font-weight: 900;
  cursor: pointer;
}

.auth-message {
  margin: 1rem 0 0;
  padding: 0.78rem 0.9rem;
  border: 1px solid rgba(16, 36, 29, 0.1);
  border-radius: 16px;
  color: #52665d;
  background: rgba(16, 36, 29, 0.04);
  font-size: 0.84rem;
  font-weight: 700;
  line-height: 1.45;
}

.auth-message[data-tone="success"] {
  border-color: rgba(35, 197, 142, 0.32);
  color: #075b45;
  background: rgba(35, 197, 142, 0.11);
}

.auth-message[data-tone="warning"] {
  border-color: rgba(245, 158, 11, 0.34);
  color: #6f4705;
  background: rgba(245, 158, 11, 0.12);
}

.auth-message[data-tone="error"] {
  border-color: rgba(190, 18, 60, 0.25);
  color: #8f1234;
  background: rgba(190, 18, 60, 0.08);
}

.auth-user-strip {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto auto;
  gap: 0.5rem;
  align-items: center;
  margin-top: 0.75rem;
  padding-top: 0.75rem;
  border-top: 1px solid rgba(16, 36, 29, 0.1);
  color: #52665d;
  font-size: 0.8rem;
  font-weight: 850;
}

.auth-user-strip[hidden] {
  display: none !important;
}

.auth-user-strip span {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.auth-user-strip a,
.auth-user-strip button {
  border: 0;
  color: #007b65;
  background: transparent;
  font-weight: 900;
  cursor: pointer;
}

@keyframes authOrbit {
  to { transform: rotate(360deg); }
}

@media (max-width: 980px) {
  .auth-landing-page {
    overflow-y: auto;
  }

  .auth-nav {
    height: auto;
    grid-template-columns: 1fr;
  }

  .auth-nav nav {
    justify-self: stretch;
    overflow-x: auto;
    padding-bottom: 0.2rem;
  }

  .auth-landing {
    grid-template-columns: 1fr;
    min-height: auto;
    padding: 1.2rem 0 2rem;
  }

  .auth-hero-block h1 {
    font-size: clamp(2.35rem, 12vw, 4.2rem);
  }
}

@media (max-width: 620px) {
  .auth-proof-grid {
    grid-template-columns: 1fr;
  }

  .auth-illustration {
    min-height: 9.5rem;
  }

  .auth-terminal {
    width: calc(100% - 2rem);
  }

  .auth-envelope {
    display: none;
  }

  .auth-user-strip {
    grid-template-columns: 1fr;
  }
}


/* Member dashboard and account controls. */
[data-user-only][hidden],
[data-guest-only][hidden] {
  display: none !important;
}

.auth-landing-page.is-authenticated {
  overflow-y: auto;
}

.member-nav-link,
.member-nav-profile,
.header-profile {
  align-items: center;
  gap: 0.55rem;
}

.member-nav-profile,
.header-profile {
  display: flex;
  padding: 0.34rem 0.42rem 0.34rem 0.34rem;
  border: 1px solid rgba(16, 36, 29, 0.12);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.78);
  box-shadow: 0 12px 32px rgba(16, 36, 29, 0.08);
}

.member-nav-profile span:not(.user-avatar-mini),
.header-profile-main span:not(.user-avatar-mini) {
  display: grid;
  gap: 0.05rem;
  min-width: 0;
}

.member-nav-profile strong,
.header-profile-main strong {
  max-width: 9.5rem;
  overflow: hidden;
  color: #071611;
  font-size: 0.78rem;
  line-height: 1.05;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.member-nav-profile small,
.header-profile-main small {
  max-width: 10rem;
  overflow: hidden;
  color: #64756f;
  font-size: 0.68rem;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.member-nav-profile button,
.header-profile button {
  min-height: 2.05rem !important;
  padding: 0.45rem 0.7rem !important;
  color: white !important;
  border-color: #071611 !important;
  background: #071611 !important;
}

.header-profile {
  margin-left: auto;
}

.header-profile-main {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  min-width: 0;
  color: inherit;
  text-decoration: none;
}

.user-avatar-mini,
.user-avatar-large {
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  color: white;
  border: 1px solid rgba(255, 255, 255, 0.42);
  background:
    radial-gradient(circle at 72% 18%, rgba(255, 255, 255, 0.42), transparent 0.55rem),
    linear-gradient(135deg, var(--avatar-tone, #23c58e), #071611);
  box-shadow: inset 0 0 0 1px rgba(7, 22, 17, 0.16), 0 12px 26px rgba(7, 22, 17, 0.18);
}

.user-avatar-mini {
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 50%;
  font-size: 1rem;
  font-weight: 900;
}

.user-avatar-large {
  width: 5.2rem;
  height: 5.2rem;
  border-radius: 1.7rem;
  font-size: 2.15rem;
  font-weight: 900;
}

.member-dashboard {
  position: relative;
  z-index: 2;
  width: min(1180px, calc(100% - 2rem));
  margin: 0 auto;
  padding: clamp(1.1rem, 2.5vw, 2rem) 0 2.4rem;
}

.member-hero-card,
.member-card,
.member-stat-grid article {
  border: 1px solid rgba(16, 36, 29, 0.12);
  background: rgba(255, 255, 255, 0.74);
  box-shadow: 0 24px 70px rgba(16, 36, 29, 0.09);
  backdrop-filter: blur(20px);
}

.member-hero-card {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(17rem, 0.34fr);
  gap: 1rem;
  align-items: stretch;
  padding: clamp(1.1rem, 2.5vw, 1.65rem);
  border-radius: 32px;
}

.member-hero-copy {
  display: grid;
  align-content: center;
  gap: 0.85rem;
  min-height: 15rem;
  padding: clamp(0.6rem, 2vw, 1rem);
}

.member-hero-copy h1 {
  max-width: 760px;
  margin: 0;
  color: #071611;
  font-family: var(--font-display, "Manrope", sans-serif) !important;
  font-size: clamp(2.25rem, 7vw, 5.6rem);
  font-weight: 950;
  letter-spacing: -0.075em;
  line-height: 0.86;
}

.member-hero-copy p:not(.eyebrow) {
  max-width: 680px;
  margin: 0;
  color: #41584f;
  font-size: clamp(0.95rem, 1.25vw, 1.08rem);
  font-weight: 650;
  line-height: 1.65;
}

.member-hero-actions,
.member-card-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.7rem;
}

.member-identity-card {
  display: grid;
  align-content: center;
  justify-items: start;
  gap: 0.7rem;
  min-height: 100%;
  padding: 1.2rem;
  overflow: hidden;
  color: white;
  border-radius: 26px;
  background:
    radial-gradient(circle at 82% 4%, rgba(35, 197, 142, 0.42), transparent 8rem),
    linear-gradient(135deg, #071611, #142922 60%, #0c3f31);
}

.member-identity-card strong {
  font-size: 1.25rem;
  letter-spacing: -0.03em;
}

.member-identity-card small {
  max-width: 100%;
  overflow: hidden;
  color: rgba(255, 255, 255, 0.72);
  text-overflow: ellipsis;
}

.member-identity-card a {
  color: #9ff5d6;
  font-size: 0.82rem;
  font-weight: 900;
}

.member-stat-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.8rem;
  margin-top: 0.9rem;
}

.member-stat-grid article {
  display: grid;
  gap: 0.3rem;
  min-height: 6.2rem;
  padding: 1rem;
  border-radius: 22px;
}

.member-stat-grid span {
  color: #5b6f66;
  font-size: 0.76rem;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.member-stat-grid strong {
  color: #071611;
  font-size: clamp(1.9rem, 4vw, 3rem);
  line-height: 1;
}

.member-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(20rem, 0.72fr);
  gap: 0.9rem;
  margin-top: 0.9rem;
}

.member-card {
  padding: clamp(1rem, 2vw, 1.25rem);
  border-radius: 28px;
}

.member-card h2 {
  margin: 0.15rem 0 0.55rem;
  color: #071611;
  font-family: var(--font-display, "Manrope", sans-serif) !important;
  font-size: clamp(1.45rem, 3vw, 2rem);
  letter-spacing: -0.045em;
}

.next-lesson-card {
  display: grid;
  grid-template-columns: 8rem minmax(0, 1fr) auto;
  gap: 1rem;
  align-items: center;
  min-height: 12rem;
}

.next-lesson-card img {
  width: 8rem;
  height: 6.2rem;
  object-fit: cover;
  border-radius: 18px;
  background: #071611;
}

.next-lesson-card span {
  color: #0f8f68;
  font-size: 0.74rem;
  font-weight: 900;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.next-lesson-card strong {
  display: block;
  margin: 0.2rem 0 0.3rem;
  color: #071611;
  font-size: 1.15rem;
  line-height: 1.25;
}

.next-lesson-card p,
.account-message,
.account-form p,
.dashboard-empty-course p {
  margin: 0;
  color: #52675f;
  line-height: 1.55;
}

.account-message {
  padding: 0.75rem 0.85rem;
  border: 1px solid rgba(16, 36, 29, 0.1);
  border-radius: 16px;
  background: rgba(246, 249, 244, 0.76);
  font-size: 0.86rem;
}

.account-message[data-tone="success"] {
  border-color: rgba(35, 197, 142, 0.32);
  color: #075b45;
  background: rgba(35, 197, 142, 0.11);
}

.account-message[data-tone="warning"] {
  border-color: rgba(245, 158, 11, 0.34);
  color: #6f4705;
  background: rgba(245, 158, 11, 0.12);
}

.account-message[data-tone="error"] {
  border-color: rgba(190, 18, 60, 0.25);
  color: #8f1234;
  background: rgba(190, 18, 60, 0.08);
}

.account-form {
  display: grid;
  gap: 0.75rem;
  margin-top: 0.85rem;
}

.account-form label {
  display: grid;
  gap: 0.42rem;
  color: #10241d;
  font-size: 0.82rem;
  font-weight: 900;
}

.account-form input {
  width: 100%;
  min-height: 2.9rem;
  padding: 0 0.95rem;
  color: #071611;
  border: 1px solid rgba(16, 36, 29, 0.16);
  border-radius: 15px;
  outline: none;
  background: rgba(255, 255, 255, 0.86);
}

.account-form input:focus {
  border-color: rgba(35, 197, 142, 0.78);
  box-shadow: 0 0 0 4px rgba(35, 197, 142, 0.12);
}

.avatar-picker {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 0.48rem;
}

.avatar-picker button {
  display: grid;
  place-items: center;
  gap: 0.25rem;
  min-height: 4rem;
  border: 1px solid rgba(16, 36, 29, 0.12);
  border-radius: 18px;
  color: #071611;
  background: rgba(246, 249, 244, 0.8);
  cursor: pointer;
}

.avatar-picker button span {
  display: grid;
  place-items: center;
  width: 2rem;
  height: 2rem;
  color: white;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--avatar-tone), #071611);
}

.avatar-picker button small {
  color: #63776e;
  font-size: 0.65rem;
  font-weight: 900;
}

.avatar-picker button.is-selected {
  border-color: #23c58e;
  background: rgba(35, 197, 142, 0.11);
  box-shadow: 0 0 0 4px rgba(35, 197, 142, 0.1);
}

.account-divider {
  height: 1px;
  margin: 1rem 0 0.2rem;
  background: rgba(16, 36, 29, 0.1);
}

.current-email {
  color: #52675f;
  font-size: 0.84rem;
}

.current-email strong {
  color: #071611;
}

.email-verify-panel {
  padding: 0.85rem;
  border: 1px solid rgba(245, 158, 11, 0.3);
  border-radius: 18px;
  background: rgba(245, 158, 11, 0.08);
}

.member-courses-card {
  margin-top: 0.9rem;
}

.member-card-head {
  justify-content: space-between;
  margin-bottom: 0.9rem;
}

.member-card-head h2 {
  margin-bottom: 0;
}

.member-card-head a,
.dashboard-empty-course a {
  color: #0f8f68;
  font-weight: 900;
}

.dashboard-course-list {
  display: grid;
  gap: 0.65rem;
}

.dashboard-course-row,
.dashboard-empty-course {
  position: relative;
  display: grid;
  grid-template-columns: 4.8rem minmax(0, 1fr);
  gap: 0.8rem;
  align-items: center;
  overflow: hidden;
  padding: 0.65rem;
  color: inherit;
  text-decoration: none;
  border: 1px solid rgba(16, 36, 29, 0.1);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.78);
}

.dashboard-course-row img {
  width: 4.8rem;
  height: 3.2rem;
  object-fit: cover;
  border-radius: 13px;
}

.dashboard-course-row strong,
.dashboard-empty-course strong {
  display: block;
  color: #071611;
  font-size: 0.95rem;
  line-height: 1.25;
}

.dashboard-course-row small {
  display: block;
  margin-top: 0.25rem;
  color: #5b6f66;
}

.dashboard-course-row i {
  position: absolute;
  left: 0;
  right: auto;
  bottom: 0;
  width: var(--row-progress, 0%);
  height: 0.24rem;
  background: linear-gradient(90deg, #23c58e, #f59e0b);
}

.dashboard-empty-course {
  grid-template-columns: 1fr;
  padding: 1rem;
}

@media (max-width: 980px) {
  .member-hero-card,
  .member-grid,
  .next-lesson-card {
    grid-template-columns: 1fr;
  }

  .member-stat-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .next-lesson-card img {
    width: 100%;
    height: 10rem;
  }
}

@media (max-width: 620px) {
  .member-dashboard {
    width: min(100% - 1rem, 1180px);
  }

  .member-stat-grid,
  .avatar-picker {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .member-nav-profile {
    width: 100%;
    justify-content: space-between;
  }
}