:root {
  --yoruba-indigo: color-mix(in srgb, var(--cyan) 12%, var(--void-3));
  --yoruba-indigo-soft: color-mix(in srgb, var(--cyan) 20%, var(--void-3));
  --yoruba-brass: var(--gold);
  --yoruba-terracotta: var(--coral);
  --yoruba-cyan: var(--cyan);
  --yoruba-ink: var(--void);
  --yoruba-panel: var(--void-2);
  --yoruba-panel-raised: var(--void-3);
  --yoruba-paper: var(--ice);
  --yoruba-muted: var(--steel);
  --yoruba-line: color-mix(in srgb, var(--yoruba-paper) 13%, transparent);
  --yoruba-focus: var(--yoruba-terracotta);
}

html { scroll-behavior: smooth; }

body[data-yoruba-course] {
  margin: 0;
  overflow-x: hidden;
  color: var(--yoruba-paper);
  background:
    radial-gradient(circle at 92% 12%, color-mix(in srgb, var(--yoruba-indigo-soft) 30%, transparent), transparent 30rem),
    var(--yoruba-ink);
  font-family: Inter, sans-serif;
  line-height: 1.65;
}

body[data-yoruba-course]::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 100;
  pointer-events: none;
  opacity: .055;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 180 180' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.55'/%3E%3C/svg%3E");
}

body[data-yoruba-course] *,
body[data-yoruba-course] *::before,
body[data-yoruba-course] *::after { box-sizing: border-box; }

body[data-yoruba-course] a { color: inherit; }

body[data-yoruba-course] button,
body[data-yoruba-course] input,
body[data-yoruba-course] textarea { font: inherit; }

body[data-yoruba-course] :focus-visible {
  outline: 3px solid var(--yoruba-focus);
  outline-offset: 4px;
}

.yoruba-skip {
  position: fixed;
  z-index: 300;
  left: 1rem;
  top: 1rem;
  padding: .7rem 1rem;
  color: var(--yoruba-ink);
  background: var(--yoruba-paper);
  transform: translateY(-180%);
  transition: transform .25s cubic-bezier(.16,1,.3,1);
}

.yoruba-skip:focus { transform: translateY(0); }

.yoruba-nav {
  position: sticky;
  z-index: 90;
  top: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 4.75rem;
  padding: .7rem clamp(1.1rem, 4vw, 4rem);
  border-bottom: 1px solid var(--yoruba-line);
  background: color-mix(in srgb, var(--yoruba-ink) 88%, transparent);
  backdrop-filter: blur(18px);
}

.yoruba-brand {
  display: inline-flex;
  align-items: center;
  gap: .8rem;
  text-decoration: none;
}

.yoruba-brand img { object-fit: contain; }

.yoruba-brand span { display: grid; line-height: 1.1; }
.yoruba-brand b { font-family: "Bebas Neue", sans-serif; font-size: 1.35rem; letter-spacing: .12em; }
.yoruba-brand small { color: var(--yoruba-muted); font-size: .62rem; letter-spacing: .04em; }

.yoruba-nav nav { display: none; gap: 1.3rem; }
.yoruba-nav nav a { color: var(--yoruba-muted); font-size: .79rem; font-weight: 600; text-decoration: none; }
.yoruba-nav nav a:hover { color: var(--yoruba-paper); }

.yoruba-nav-cta {
  padding: .55rem .75rem;
  border: 1px solid color-mix(in srgb, var(--yoruba-terracotta) 65%, transparent);
  border-radius: .375rem;
  color: var(--yoruba-paper);
  font-family: "JetBrains Mono", monospace;
  font-size: .67rem;
  text-decoration: none;
  text-transform: uppercase;
}

.yoruba-hero {
  position: relative;
  isolation: isolate;
  display: grid;
  align-items: end;
  min-height: min(54rem, calc(100svh - 4.75rem));
  overflow: hidden;
  border-bottom: 1px solid var(--yoruba-line);
}

.yoruba-hero-video {
  display: none;
  position: absolute;
  z-index: -3;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.yoruba-hero::before {
  content: "";
  position: absolute;
  z-index: -4;
  inset: 0;
  background: url("/yoruba/media/hero-gemini.webp") center / cover no-repeat;
}

.yoruba-hero-shade {
  position: absolute;
  z-index: -2;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(90deg, color-mix(in srgb, var(--yoruba-ink) 96%, transparent) 0%, color-mix(in srgb, var(--yoruba-ink) 76%, transparent) 48%, color-mix(in srgb, var(--yoruba-ink) 22%, transparent) 100%),
    linear-gradient(0deg, var(--yoruba-ink), transparent 45%);
}

.yoruba-hero-content {
  width: min(100%, 76rem);
  padding: clamp(5rem, 12vw, 10rem) clamp(1.4rem, 6vw, 6rem) clamp(3rem, 8vw, 6rem);
}

.yoruba-eyebrow {
  margin: 0 0 1rem;
  color: var(--yoruba-cyan);
  font-family: "JetBrains Mono", monospace;
  font-size: .68rem;
  font-weight: 500;
  letter-spacing: .14em;
  text-transform: uppercase;
}

.yoruba-hero h1,
.yoruba-section-head h2,
.yoruba-signal-lab h2,
.yoruba-keyboard h2 {
  margin: 0;
  font-family: "Bebas Neue", sans-serif;
  font-weight: 400;
  letter-spacing: .015em;
  line-height: .92;
  text-wrap: balance;
}

.yoruba-hero h1 { max-width: 8ch; font-size: clamp(5.1rem, 17vw, 11rem); }
.yoruba-hero h1 span { color: var(--yoruba-terracotta); }
.yoruba-hero-lede { max-width: 42rem; margin: 1.5rem 0 0; color: color-mix(in srgb, var(--yoruba-paper) 76%, transparent); font-size: clamp(1rem, 2vw, 1.22rem); }

.yoruba-hero-actions { display: flex; flex-wrap: wrap; gap: .8rem; margin-top: 2rem; }

.yoruba-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3rem;
  padding: .65rem 1rem;
  border-radius: .375rem;
  font-weight: 600;
  text-decoration: none;
  transition: transform .25s cubic-bezier(.16,1,.3,1), border-color .25s cubic-bezier(.16,1,.3,1), background .25s cubic-bezier(.16,1,.3,1);
}

.yoruba-button:hover { transform: translateY(-2px); }
.yoruba-button-primary { color: var(--yoruba-paper); background: var(--yoruba-terracotta); }
.yoruba-button-secondary { border: 1px solid var(--yoruba-line); color: var(--yoruba-paper); background: color-mix(in srgb, var(--yoruba-panel) 72%, transparent); }
.yoruba-button-secondary:hover { border-color: var(--yoruba-terracotta); }

.yoruba-hero-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  max-width: 42rem;
  margin: 3.25rem 0 0;
  border-top: 1px solid var(--yoruba-line);
}

.yoruba-hero-stats div { padding: 1rem .8rem 0 0; }
.yoruba-hero-stats dt { color: var(--yoruba-muted); font-family: "JetBrains Mono", monospace; font-size: .59rem; text-transform: uppercase; }
.yoruba-hero-stats dd { margin: .2rem 0 0; font-size: .8rem; font-weight: 600; }

.yoruba-now {
  position: absolute;
  right: clamp(1.4rem, 5vw, 5rem);
  bottom: clamp(2rem, 6vw, 5rem);
  display: none;
  width: 18rem;
  padding: 1.2rem;
  border: 1px solid var(--yoruba-line);
  border-radius: .5rem;
  background: color-mix(in srgb, var(--yoruba-panel) 86%, transparent);
  backdrop-filter: blur(16px);
}

.yoruba-now p { margin: 0 0 .7rem; color: var(--yoruba-brass); font-family: "JetBrains Mono", monospace; font-size: .62rem; letter-spacing: .12em; }
.yoruba-now strong, .yoruba-now small { display: block; }
.yoruba-now strong { margin-top: .75rem; font-size: .86rem; }
.yoruba-now small { margin-top: .2rem; color: var(--yoruba-muted); }

.yoruba-progress-track { height: .42rem; overflow: hidden; border-radius: .2rem; background: var(--yoruba-panel-raised); }
.yoruba-progress-track span { display: block; width: 0; height: 100%; background: linear-gradient(90deg, var(--yoruba-terracotta), var(--yoruba-brass)); transition: width .45s cubic-bezier(.16,1,.3,1); }

.yoruba-principles {
  display: grid;
  grid-template-columns: 1fr;
  max-width: 80rem;
  margin: 0 auto;
  border-inline: 1px solid var(--yoruba-line);
}

.yoruba-principles article { padding: 1.45rem; border-bottom: 1px solid var(--yoruba-line); }
.yoruba-principles span { color: var(--yoruba-terracotta); font-family: "JetBrains Mono", monospace; font-size: .61rem; }
.yoruba-principles h2 { margin: .55rem 0 .25rem; font-size: .93rem; }
.yoruba-principles p { margin: 0; color: var(--yoruba-muted); font-size: .8rem; }

.yoruba-section {
  width: min(100%, 80rem);
  margin: 0 auto;
  padding: clamp(5rem, 10vw, 9rem) clamp(1.5rem, 5vw, 4rem);
}

.yoruba-section-head { max-width: 49rem; margin-bottom: 2.2rem; }
.yoruba-section-head h2,
.yoruba-signal-lab h2,
.yoruba-keyboard h2 { font-size: clamp(3.25rem, 8vw, 6.7rem); }
.yoruba-section-head > p:last-child,
.yoruba-signal-copy > p,
.yoruba-keyboard > div > p { color: var(--yoruba-muted); }

.yoruba-module-grid { display: grid; gap: 1rem; }

.yoruba-module-card {
  position: relative;
  min-height: 28rem;
  overflow: hidden;
  border: 1px solid var(--yoruba-line);
  border-radius: .65rem;
  background: var(--yoruba-panel);
  transition: transform .3s cubic-bezier(.16,1,.3,1), border-color .3s cubic-bezier(.16,1,.3,1);
}

.yoruba-module-card:hover { transform: translateY(-5px); border-color: color-mix(in srgb, var(--yoruba-brass) 58%, transparent); }
.yoruba-module-card img { width: 100%; height: 15rem; object-fit: cover; filter: saturate(.82) contrast(1.06); }
.yoruba-module-card-body { padding: 1.4rem; }
.yoruba-module-meta { display: flex; justify-content: space-between; gap: .7rem; color: var(--yoruba-cyan); font-family: "JetBrains Mono", monospace; font-size: .6rem; text-transform: uppercase; }
.yoruba-module-card h3 { margin: .75rem 0 .4rem; font-family: "Bebas Neue", sans-serif; font-size: 2.35rem; line-height: 1; }
.yoruba-module-card p { margin: 0; color: var(--yoruba-muted); font-size: .86rem; }
.yoruba-module-card button { margin-top: 1.2rem; padding: 0; border: 0; color: var(--yoruba-terracotta); background: none; font-weight: 600; cursor: pointer; }

.yoruba-handbook { border-block: 1px solid var(--yoruba-line); }
.yoruba-handbook-note { align-self: end; margin: 0; padding: 1rem; border-left: .2rem solid var(--yoruba-cyan); color: var(--yoruba-muted); background: color-mix(in srgb, var(--yoruba-cyan) 6%, transparent); font-size: .82rem; }
.yoruba-handbook-note strong { color: var(--yoruba-paper); }
.yoruba-handbook-grid { display: grid; gap: .7rem; }
.yoruba-handbook-card { border: 1px solid var(--yoruba-line); border-radius: .5rem; background: var(--yoruba-panel); }
.yoruba-handbook-card[open] { border-color: color-mix(in srgb, var(--yoruba-brass) 45%, var(--yoruba-line)); }
.yoruba-handbook-card summary { display: grid; grid-template-columns: minmax(7rem, .25fr) 1fr auto; align-items: center; gap: .9rem; padding: 1rem; cursor: pointer; list-style: none; }
.yoruba-handbook-card summary::-webkit-details-marker { display: none; }
.yoruba-handbook-card summary span { color: var(--yoruba-cyan); font-family: "JetBrains Mono", monospace; font-size: .6rem; letter-spacing: .09em; text-transform: uppercase; }
.yoruba-handbook-card summary strong { font-size: .9rem; }
.yoruba-handbook-card summary i { color: var(--yoruba-terracotta); font-family: "JetBrains Mono", monospace; font-size: 1.2rem; font-style: normal; transition: transform .25s cubic-bezier(.16,1,.3,1); }
.yoruba-handbook-card[open] summary i { transform: rotate(45deg); }
.yoruba-handbook-body { padding: 0 clamp(1rem, 4vw, 2rem) 1.5rem; border-top: 1px solid var(--yoruba-line); }
.yoruba-handbook-body > p { max-width: 52rem; color: var(--yoruba-muted); }
.yoruba-handbook-body ul { padding-left: 1.2rem; }
.yoruba-handbook-body li + li { margin-top: .55rem; }
.yoruba-reference-table { overflow-x: auto; margin-top: 1rem; border: 1px solid var(--yoruba-line); }
.yoruba-reference-table table { width: 100%; min-width: 38rem; border-collapse: collapse; font-size: .75rem; }
.yoruba-reference-table th,
.yoruba-reference-table td { padding: .65rem .75rem; border-bottom: 1px solid var(--yoruba-line); text-align: left; vertical-align: top; }
.yoruba-reference-table thead th { color: var(--yoruba-brass); font-family: "JetBrains Mono", monospace; font-size: .58rem; letter-spacing: .08em; text-transform: uppercase; }
.yoruba-reference-table tbody th { color: var(--yoruba-paper); }
.yoruba-reference-table tbody td { color: var(--yoruba-muted); }

.yoruba-signal-lab,
.yoruba-keyboard {
  display: grid;
  gap: 2rem;
  width: min(calc(100% - 2rem), 74rem);
  margin: 0 auto;
  padding: clamp(2rem, 6vw, 5rem);
  border: 1px solid var(--yoruba-line);
  border-radius: .7rem;
  background:
    linear-gradient(145deg, color-mix(in srgb, var(--yoruba-indigo) 72%, transparent), color-mix(in srgb, var(--yoruba-panel) 94%, transparent)),
    var(--yoruba-panel);
}

.yoruba-tone-choices { display: flex; flex-wrap: wrap; gap: .6rem; margin: 1.5rem 0 0; }
.yoruba-tone-choices button,
.yoruba-next-tone,
.yoruba-filter-row button,
.yoruba-unit-complete,
.yoruba-copy,
.yoruba-key-row button {
  border: 1px solid var(--yoruba-line);
  border-radius: .375rem;
  color: var(--yoruba-paper);
  background: var(--yoruba-panel-raised);
  cursor: pointer;
  transition: border-color .25s cubic-bezier(.16,1,.3,1), background .25s cubic-bezier(.16,1,.3,1), transform .25s cubic-bezier(.16,1,.3,1);
}

.yoruba-tone-choices button { min-width: 6rem; padding: .65rem 1rem; }
.yoruba-tone-choices button:hover,
.yoruba-next-tone:hover,
.yoruba-filter-row button:hover,
.yoruba-copy:hover,
.yoruba-key-row button:hover { border-color: var(--yoruba-terracotta); transform: translateY(-1px); }
.yoruba-tone-choices button[data-result="correct"] { border-color: var(--yoruba-cyan); background: color-mix(in srgb, var(--yoruba-cyan) 12%, var(--yoruba-panel-raised)); }
.yoruba-tone-choices button[data-result="wrong"] { border-color: var(--yoruba-terracotta); }
.yoruba-tone-feedback { min-height: 1.6rem; color: var(--yoruba-paper); font-size: .86rem; }

.yoruba-tone-stage { display: grid; place-items: center; align-content: center; min-height: 25rem; border: 1px solid color-mix(in srgb, var(--yoruba-brass) 35%, transparent); border-radius: .5rem; background: color-mix(in srgb, var(--yoruba-ink) 60%, transparent); text-align: center; }
.yoruba-tone-label { color: var(--yoruba-brass); font-family: "JetBrains Mono", monospace; font-size: .65rem; letter-spacing: .16em; }
.yoruba-tone-stage strong { margin: 1rem 0; font-family: "Bebas Neue", sans-serif; font-size: clamp(6rem, 20vw, 10rem); font-weight: 400; line-height: 1; }
.yoruba-next-tone { padding: .6rem .9rem; }
.yoruba-tone-stage p { max-width: 28rem; margin: 1.5rem 1rem 0; color: var(--yoruba-muted); font-size: .76rem; }

.yoruba-section-head-split { display: grid; max-width: none; gap: 1.3rem; }
.yoruba-course-tools { align-self: end; }
.yoruba-course-tools label,
.yoruba-keyboard-workspace label { display: block; margin-bottom: .45rem; color: var(--yoruba-muted); font-family: "JetBrains Mono", monospace; font-size: .62rem; letter-spacing: .08em; text-transform: uppercase; }
.yoruba-course-tools input,
.yoruba-keyboard-workspace textarea,
.yoruba-unit-notes {
  width: 100%;
  border: 1px solid var(--yoruba-line);
  border-radius: .375rem;
  color: var(--yoruba-paper);
  background: var(--yoruba-panel);
}
.yoruba-course-tools input { min-height: 3.2rem; padding: .7rem 1rem; }
.yoruba-course-tools input::placeholder,
.yoruba-keyboard-workspace textarea::placeholder,
.yoruba-unit-notes::placeholder { color: color-mix(in srgb, var(--yoruba-muted) 70%, transparent); }

.yoruba-filter-row { display: flex; gap: .55rem; overflow-x: auto; padding: 0 0 1rem; }
.yoruba-filter-row button { flex: 0 0 auto; padding: .5rem .75rem; color: var(--yoruba-muted); font-family: "JetBrains Mono", monospace; font-size: .64rem; }
.yoruba-filter-row button[aria-pressed="true"] { border-color: var(--yoruba-terracotta); color: var(--yoruba-paper); background: color-mix(in srgb, var(--yoruba-terracotta) 12%, var(--yoruba-panel-raised)); }

.yoruba-course-layout { display: grid; gap: 1rem; }
.yoruba-unit-list { display: grid; align-content: start; max-height: 47rem; overflow-y: auto; border: 1px solid var(--yoruba-line); border-radius: .5rem; background: var(--yoruba-panel); scrollbar-color: var(--yoruba-indigo-soft) var(--yoruba-panel); }
.yoruba-unit-link { display: grid; grid-template-columns: 2.5rem 1fr auto; align-items: center; gap: .75rem; width: 100%; padding: .9rem; border: 0; border-bottom: 1px solid var(--yoruba-line); color: var(--yoruba-paper); background: transparent; text-align: left; cursor: pointer; }
.yoruba-unit-link:hover,
.yoruba-unit-link[aria-current="true"] { background: color-mix(in srgb, var(--yoruba-indigo) 36%, var(--yoruba-panel)); }
.yoruba-unit-link[aria-current="true"] { box-shadow: inset .18rem 0 var(--yoruba-terracotta); }
.yoruba-unit-link > span:first-child { color: var(--yoruba-brass); font-family: "JetBrains Mono", monospace; font-size: .65rem; }
.yoruba-unit-link strong { display: block; font-size: .82rem; }
.yoruba-unit-link small { display: block; color: var(--yoruba-muted); font-size: .68rem; }
.yoruba-unit-state { width: .75rem; height: .75rem; border: 1px solid var(--yoruba-line); border-radius: 50%; }
.yoruba-unit-link[data-complete="true"] .yoruba-unit-state { border-color: var(--yoruba-cyan); background: var(--yoruba-cyan); box-shadow: 0 0 1rem color-mix(in srgb, var(--yoruba-cyan) 45%, transparent); }
.yoruba-empty { padding: 2rem; color: var(--yoruba-muted); }

.yoruba-unit-reader { min-height: 40rem; padding: clamp(1.3rem, 4vw, 2.5rem); border: 1px solid var(--yoruba-line); border-radius: .5rem; background: linear-gradient(150deg, color-mix(in srgb, var(--yoruba-indigo) 18%, var(--yoruba-panel)), var(--yoruba-panel)); }
.yoruba-unit-reader-header { display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.yoruba-unit-reader-header p { margin: 0; color: var(--yoruba-cyan); font-family: "JetBrains Mono", monospace; font-size: .62rem; text-transform: uppercase; }
.yoruba-unit-reader h3 { margin: .75rem 0 .5rem; font-family: "Bebas Neue", sans-serif; font-size: clamp(2.8rem, 7vw, 5rem); font-weight: 400; line-height: .96; }
.yoruba-unit-focus { margin: 0 0 1.5rem; color: var(--yoruba-muted); }
.yoruba-can-do { padding: 1rem; border-left: .2rem solid var(--yoruba-brass); background: color-mix(in srgb, var(--yoruba-brass) 7%, transparent); }
.yoruba-can-do span { display: block; color: var(--yoruba-brass); font-family: "JetBrains Mono", monospace; font-size: .61rem; letter-spacing: .1em; text-transform: uppercase; }
.yoruba-can-do p { margin: .35rem 0 0; }
.yoruba-full-lesson { margin-top: 2rem; border-block: 1px solid var(--yoruba-line); }
.yoruba-lesson-arrival { display: grid; gap: 1rem; padding: 1.4rem 0; }
.yoruba-lesson-arrival h4 { margin: .2rem 0 0; font-family: "Bebas Neue", sans-serif; font-size: 2.5rem; font-weight: 400; line-height: 1; }
.yoruba-lesson-arrival dl { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .65rem; margin: 0; }
.yoruba-lesson-arrival dl div { padding: .75rem; border: 1px solid var(--yoruba-line); background: var(--yoruba-panel); }
.yoruba-lesson-arrival dt { color: var(--yoruba-muted); font-family: "JetBrains Mono", monospace; font-size: .55rem; letter-spacing: .08em; text-transform: uppercase; }
.yoruba-lesson-arrival dd { margin: .2rem 0 0; font-size: .76rem; font-weight: 600; }
.yoruba-lesson-kicker { margin: 0; color: var(--yoruba-cyan); font-family: "JetBrains Mono", monospace; font-size: .59rem; letter-spacing: .11em; text-transform: uppercase; }
.yoruba-warmup { display: grid; gap: .55rem; margin: 0 0 1.5rem; padding: 1rem 1.2rem; border-left: .2rem solid var(--yoruba-terracotta); background: color-mix(in srgb, var(--yoruba-terracotta) 7%, transparent); }
.yoruba-warmup span,
.yoruba-takeaway span { color: var(--yoruba-terracotta); font-family: "JetBrains Mono", monospace; font-size: .6rem; letter-spacing: .1em; text-transform: uppercase; }
.yoruba-warmup p,
.yoruba-takeaway p { margin: 0; }
.yoruba-teaching-sequence { border-top: 1px solid var(--yoruba-line); }
.yoruba-lesson-chapter { display: grid; grid-template-columns: 4.5rem 1fr; gap: 1.2rem; padding: 1.7rem 0; border-bottom: 1px solid var(--yoruba-line); }
.yoruba-lesson-chapter-mark { color: var(--yoruba-muted); font-family: "JetBrains Mono", monospace; font-size: .58rem; letter-spacing: .08em; text-transform: uppercase; }
.yoruba-lesson-chapter-mark span { display: block; margin-bottom: .3rem; color: var(--yoruba-brass); font-family: "Bebas Neue", sans-serif; font-size: 2rem; line-height: 1; }
.yoruba-lesson-chapter h4,
.yoruba-language-section h4,
.yoruba-guided h4,
.yoruba-check-section h4 { margin: 0 0 .7rem; font-family: "Bebas Neue", sans-serif; font-size: clamp(1.8rem, 4vw, 2.55rem); font-weight: 400; line-height: 1; }
.yoruba-lesson-chapter p { margin: 0; color: color-mix(in srgb, var(--yoruba-paper) 82%, transparent); }
.yoruba-lesson-chapter p + p { margin-top: .8rem; }
.yoruba-language-section,
.yoruba-guided,
.yoruba-check-section { padding: 1.8rem 0; border-bottom: 1px solid var(--yoruba-line); }
.yoruba-language-bank { display: grid; gap: .65rem; }
.yoruba-language-bank article { display: grid; grid-template-columns: minmax(5rem, .35fr) 1fr; gap: .2rem 1rem; padding: .85rem; border: 1px solid var(--yoruba-line); background: color-mix(in srgb, var(--yoruba-indigo) 22%, var(--yoruba-panel)); }
.yoruba-language-bank strong { color: var(--yoruba-brass); font-size: 1.05rem; }
.yoruba-language-bank span { font-size: .78rem; }
.yoruba-language-bank p { grid-column: 1 / -1; margin: 0; color: var(--yoruba-muted); font-size: .72rem; }
.yoruba-guided ol { margin: 0; padding: 0; list-style: none; counter-reset: guided-step; }
.yoruba-guided li { position: relative; min-height: 2.5rem; padding: .55rem 0 .55rem 3rem; counter-increment: guided-step; }
.yoruba-guided li::before { content: counter(guided-step, decimal-leading-zero); position: absolute; left: 0; top: .45rem; color: var(--yoruba-brass); font-family: "JetBrains Mono", monospace; font-size: .67rem; }
.yoruba-knowledge-check { margin: 1rem 0 0; padding: 1rem; border: 1px solid var(--yoruba-line); }
.yoruba-knowledge-check legend { max-width: 100%; padding: 0 .5rem; font-weight: 600; }
.yoruba-knowledge-check legend span { display: block; color: var(--yoruba-cyan); font-family: "JetBrains Mono", monospace; font-size: .56rem; letter-spacing: .09em; text-transform: uppercase; }
.yoruba-check-choices { display: grid; gap: .5rem; margin-top: .75rem; }
.yoruba-check-choices button { width: 100%; padding: .7rem .8rem; border: 1px solid var(--yoruba-line); border-radius: .375rem; color: var(--yoruba-paper); background: var(--yoruba-panel-raised); text-align: left; cursor: pointer; transition: border-color .25s cubic-bezier(.16,1,.3,1), background .25s cubic-bezier(.16,1,.3,1); }
.yoruba-check-choices button:hover { border-color: var(--yoruba-terracotta); }
.yoruba-check-choices button[data-result="correct"] { border-color: var(--yoruba-cyan); background: color-mix(in srgb, var(--yoruba-cyan) 10%, var(--yoruba-panel-raised)); }
.yoruba-check-choices button[data-result="wrong"] { border-color: var(--yoruba-terracotta); }
.yoruba-knowledge-check [data-check-feedback] { margin: .75rem 0 0; color: var(--yoruba-muted); font-size: .76rem; }
.yoruba-takeaway { margin: 1.5rem 0; padding: 1.2rem; border: 1px solid color-mix(in srgb, var(--yoruba-brass) 42%, var(--yoruba-line)); background: color-mix(in srgb, var(--yoruba-brass) 7%, transparent); }
.yoruba-ask-tutor { width: 100%; margin-bottom: 1.5rem; padding: .85rem 1rem; border: 1px solid var(--yoruba-terracotta); border-radius: .375rem; color: var(--yoruba-paper); background: color-mix(in srgb, var(--yoruba-terracotta) 12%, var(--yoruba-panel)); cursor: pointer; font-weight: 600; }
.yoruba-unit-brief { margin-top: 1.8rem; }
.yoruba-unit-columns { display: grid; gap: 1rem; margin: 1.3rem 0; }
.yoruba-unit-block { padding: 1rem; border: 1px solid var(--yoruba-line); border-radius: .4rem; }
.yoruba-unit-block h4 { margin: 0 0 .65rem; color: var(--yoruba-terracotta); font-size: .75rem; letter-spacing: .08em; text-transform: uppercase; }
.yoruba-unit-block ul { margin: 0; padding-left: 1.15rem; color: color-mix(in srgb, var(--yoruba-paper) 80%, transparent); font-size: .85rem; }
.yoruba-unit-block li + li { margin-top: .5rem; }
.yoruba-culture-prompt { padding: 1.1rem; border: 1px solid color-mix(in srgb, var(--yoruba-indigo-soft) 70%, transparent); border-radius: .4rem; background: color-mix(in srgb, var(--yoruba-indigo) 24%, transparent); }
.yoruba-culture-prompt strong { color: var(--yoruba-cyan); }
.yoruba-culture-prompt p { margin: .35rem 0 0; color: color-mix(in srgb, var(--yoruba-paper) 80%, transparent); }
.yoruba-proof { margin: 1.2rem 0; }
.yoruba-proof strong { color: var(--yoruba-brass); }
.yoruba-resource-chips { display: flex; flex-wrap: wrap; gap: .5rem; }
.yoruba-resource-chips a { padding: .35rem .55rem; border: 1px solid var(--yoruba-line); border-radius: .25rem; color: var(--yoruba-muted); font-size: .68rem; text-decoration: none; }
.yoruba-resource-chips a:hover { border-color: var(--yoruba-cyan); color: var(--yoruba-paper); }
.yoruba-notes-label { display: block; margin-top: 1.5rem; font-size: .74rem; font-weight: 600; }
.yoruba-unit-notes { min-height: 7rem; margin-top: .4rem; padding: .75rem; resize: vertical; }
.yoruba-reader-actions { display: flex; flex-wrap: wrap; justify-content: space-between; gap: .8rem; margin-top: 1rem; }
.yoruba-unit-complete { padding: .65rem .9rem; border-color: var(--yoruba-terracotta); }
.yoruba-unit-complete[data-complete="true"] { border-color: var(--yoruba-cyan); background: color-mix(in srgb, var(--yoruba-cyan) 12%, var(--yoruba-panel-raised)); }
.yoruba-reader-nav { display: flex; gap: .5rem; }
.yoruba-reader-nav button { padding: .65rem .75rem; border: 1px solid var(--yoruba-line); border-radius: .375rem; color: var(--yoruba-paper); background: transparent; cursor: pointer; }
.yoruba-reader-nav button:disabled { opacity: .35; cursor: not-allowed; }

.yoruba-keyboard { margin-top: clamp(5rem, 10vw, 9rem); background: linear-gradient(145deg, color-mix(in srgb, var(--yoruba-terracotta) 12%, var(--yoruba-panel)), var(--yoruba-panel)); }
.yoruba-keyboard-workspace textarea { padding: .8rem; resize: vertical; }
.yoruba-key-row { display: flex; flex-wrap: wrap; gap: .4rem; margin-top: .7rem; }
.yoruba-key-row button { min-width: 2.5rem; padding: .45rem; font-family: "JetBrains Mono", monospace; }
.yoruba-copy { margin-top: .8rem; padding: .55rem .8rem; }
.yoruba-keyboard-workspace [data-copy-status] { margin-left: .7rem; color: var(--yoruba-cyan); font-size: .75rem; }

.yoruba-culture-grid { display: grid; gap: 1rem; }
.yoruba-culture-card { position: relative; overflow: hidden; min-height: 21rem; padding: 1.4rem; border: 1px solid var(--yoruba-line); border-radius: .6rem; background: var(--yoruba-panel); }
.yoruba-culture-card::before { content: ""; position: absolute; inset: 0 0 auto; height: .18rem; background: linear-gradient(90deg, var(--yoruba-terracotta), var(--yoruba-brass), var(--yoruba-cyan)); }
.yoruba-culture-card > span { color: var(--yoruba-cyan); font-family: "JetBrains Mono", monospace; font-size: .61rem; letter-spacing: .1em; text-transform: uppercase; }
.yoruba-culture-card h3 { margin: 2.3rem 0 .65rem; font-family: "Bebas Neue", sans-serif; font-size: 2.45rem; line-height: .98; }
.yoruba-culture-card p { color: var(--yoruba-muted); font-size: .84rem; }
.yoruba-culture-card ol { padding-left: 1.1rem; font-size: .78rem; }
.yoruba-culture-card a { display: inline-block; margin: .2rem .45rem 0 0; color: var(--yoruba-terracotta); font-size: .72rem; }

.yoruba-editorial-feature { display: grid; margin-top: 1rem; overflow: hidden; border: 1px solid var(--yoruba-line); border-radius: .65rem; background: var(--yoruba-panel); }
.yoruba-editorial-feature img { width: 100%; height: 100%; min-height: 21rem; object-fit: cover; }
.yoruba-editorial-feature > div { padding: clamp(1.5rem, 5vw, 3rem); }
.yoruba-editorial-feature h3 { margin: 0; font-family: "Bebas Neue", sans-serif; font-size: clamp(3rem, 6vw, 5rem); font-weight: 400; line-height: .96; }
.yoruba-editorial-feature ol { padding-left: 1.2rem; color: var(--yoruba-muted); }
.yoruba-editorial-feature li + li { margin-top: .7rem; }

.yoruba-assessment-grid { display: grid; gap: 1rem; }
.yoruba-assessment-card { padding: 1.4rem; border: 1px solid var(--yoruba-line); border-radius: .5rem; background: var(--yoruba-panel); }
.yoruba-assessment-card span { color: var(--yoruba-cyan); font-family: "JetBrains Mono", monospace; font-size: .61rem; letter-spacing: .1em; text-transform: uppercase; }
.yoruba-assessment-card h3 { margin: 1.5rem 0 .5rem; font-size: 1rem; }
.yoruba-assessment-card p { margin: 0; color: var(--yoruba-muted); font-size: .84rem; }

.yoruba-capstone { display: grid; gap: 1.2rem; margin-top: 1rem; padding: clamp(1.5rem, 5vw, 3rem); border: 1px solid color-mix(in srgb, var(--yoruba-brass) 50%, transparent); border-radius: .6rem; background: linear-gradient(120deg, color-mix(in srgb, var(--yoruba-brass) 9%, var(--yoruba-panel)), var(--yoruba-panel)); }
.yoruba-capstone span { color: var(--yoruba-brass); font-family: "JetBrains Mono", monospace; font-size: .61rem; letter-spacing: .12em; }
.yoruba-capstone h3 { margin: .5rem 0 0; font-family: "Bebas Neue", sans-serif; font-size: clamp(2.6rem, 5vw, 4.5rem); font-weight: 400; line-height: .96; }
.yoruba-capstone p { margin: 0; color: var(--yoruba-muted); }
.yoruba-capstone a { align-self: start; color: var(--yoruba-terracotta); font-weight: 600; }

.yoruba-platform-table { overflow: hidden; border: 1px solid var(--yoruba-line); border-radius: .5rem; }
.yoruba-platform-row { display: grid; gap: .5rem; padding: 1rem; border-bottom: 1px solid var(--yoruba-line); background: var(--yoruba-panel); }
.yoruba-platform-row:last-child { border-bottom: 0; }
.yoruba-platform-row h3 { margin: 0; font-size: .9rem; }
.yoruba-platform-row p { margin: 0; color: var(--yoruba-muted); font-size: .8rem; }

.yoruba-source-list { display: grid; gap: .7rem; }
.yoruba-source-card { padding: 1rem; border: 1px solid var(--yoruba-line); border-radius: .45rem; background: var(--yoruba-panel); }
.yoruba-source-card span { color: var(--yoruba-cyan); font-family: "JetBrains Mono", monospace; font-size: .58rem; text-transform: uppercase; }
.yoruba-source-card h3 { margin: .65rem 0 .15rem; font-size: .86rem; }
.yoruba-source-card p { margin: 0; color: var(--yoruba-muted); font-size: .75rem; }
.yoruba-source-card a { display: inline-block; margin-top: .55rem; color: var(--yoruba-terracotta); font-size: .72rem; }
.yoruba-source-note { margin-top: 1rem; color: var(--yoruba-muted); font-size: .75rem; }

.yoruba-footer { display: flex; flex-direction: column; gap: .8rem; align-items: flex-start; justify-content: space-between; padding: 2rem clamp(1.5rem, 5vw, 4rem); border-top: 1px solid var(--yoruba-line); color: var(--yoruba-muted); font-size: .74rem; }
.yoruba-footer a { color: var(--yoruba-paper); }
.yoruba-footer p { max-width: 42rem; margin: 0; }

.yoruba-tutor { position: fixed; z-index: 180; right: clamp(1rem, 3vw, 2rem); bottom: clamp(1rem, 3vw, 2rem); }
.yoruba-tutor__launcher { min-width: 7.5rem; min-height: 3rem; padding: .65rem 1rem; border: 1px solid var(--yoruba-terracotta); border-radius: .375rem; color: var(--yoruba-paper); background: var(--yoruba-terracotta); box-shadow: 0 .9rem 2.5rem color-mix(in srgb, var(--yoruba-ink) 70%, transparent); cursor: pointer; font-family: "JetBrains Mono", monospace; font-size: .68rem; font-weight: 500; letter-spacing: .08em; text-transform: uppercase; }
.yoruba-tutor__panel { position: absolute; right: 0; bottom: calc(100% + .75rem); display: grid; grid-template-rows: auto auto auto minmax(5rem, 1fr) auto auto; width: min(29rem, calc(100vw - 2rem)); max-height: min(46rem, calc(100svh - 7rem)); overflow: hidden; border: 1px solid color-mix(in srgb, var(--yoruba-brass) 48%, var(--yoruba-line)); border-radius: .65rem; background: var(--yoruba-panel); box-shadow: 0 1.5rem 4rem color-mix(in srgb, var(--yoruba-ink) 85%, transparent); }
.yoruba-tutor__panel[hidden] { display: none; }
.yoruba-tutor__header { position: relative; padding: 1.1rem; border-bottom: 1px solid var(--yoruba-line); background: linear-gradient(120deg, color-mix(in srgb, var(--yoruba-indigo) 55%, var(--yoruba-panel)), var(--yoruba-panel)); }
.yoruba-tutor__header p { margin: .65rem 2.5rem 0 0; color: var(--yoruba-muted); font-size: .72rem; }
.yoruba-tutor__header h2 { margin: .2rem 2.5rem 0 0; font-family: "Bebas Neue", sans-serif; font-size: 2rem; font-weight: 400; line-height: 1; }
.yoruba-tutor__header button { position: absolute; right: .8rem; top: .8rem; padding: .3rem; border: 0; color: var(--yoruba-muted); background: transparent; cursor: pointer; font-size: .68rem; }
.yoruba-tutor__auth { padding: 1.2rem; }
.yoruba-tutor__auth p { color: var(--yoruba-muted); font-size: .78rem; }
.yoruba-tutor__auth label,
.yoruba-tutor__form label { display: block; margin-bottom: .4rem; color: var(--yoruba-cyan); font-family: "JetBrains Mono", monospace; font-size: .58rem; letter-spacing: .08em; text-transform: uppercase; }
.yoruba-tutor__auth-row { display: flex; gap: .5rem; }
.yoruba-tutor__auth input,
.yoruba-tutor__form textarea { width: 100%; border: 1px solid var(--yoruba-line); border-radius: .375rem; color: var(--yoruba-paper); background: var(--yoruba-ink); }
.yoruba-tutor__auth input { min-width: 0; padding: .65rem; }
.yoruba-tutor__auth button,
.yoruba-tutor__actions button { padding: .6rem .75rem; border: 1px solid var(--yoruba-line); border-radius: .375rem; color: var(--yoruba-paper); background: var(--yoruba-panel-raised); cursor: pointer; }
.yoruba-tutor__workspace { display: contents; }
.yoruba-tutor__workspace[hidden] { display: none; }
.yoruba-tutor__modes { display: flex; gap: .35rem; overflow-x: auto; padding: .7rem; border-bottom: 1px solid var(--yoruba-line); }
.yoruba-tutor__modes button { flex: 0 0 auto; padding: .45rem .55rem; border: 1px solid var(--yoruba-line); border-radius: .25rem; color: var(--yoruba-muted); background: transparent; cursor: pointer; font-size: .62rem; }
.yoruba-tutor__modes button[aria-pressed="true"] { border-color: var(--yoruba-terracotta); color: var(--yoruba-paper); background: color-mix(in srgb, var(--yoruba-terracotta) 10%, transparent); }
.yoruba-tutor__selection { padding: .65rem .8rem; border-bottom: 1px solid var(--yoruba-line); }
.yoruba-tutor__selection button { padding: 0; border: 0; color: var(--yoruba-terracotta); background: none; cursor: pointer; font-size: .66rem; }
.yoruba-tutor__selection p { margin: .35rem 0 0; color: var(--yoruba-muted); font-size: .66rem; }
.yoruba-tutor__log { min-height: 6rem; overflow-y: auto; padding: .8rem; }
.yoruba-tutor__turn { padding: .7rem; border: 1px solid var(--yoruba-line); border-radius: .35rem; font-size: .75rem; }
.yoruba-tutor__turn + .yoruba-tutor__turn { margin-top: .55rem; }
.yoruba-tutor__turn--user { margin-left: 2rem; background: color-mix(in srgb, var(--yoruba-terracotta) 7%, var(--yoruba-panel-raised)); }
.yoruba-tutor__turn--assistant { margin-right: 2rem; background: color-mix(in srgb, var(--yoruba-indigo) 35%, var(--yoruba-panel-raised)); }
.yoruba-tutor__turn strong { display: block; margin-bottom: .3rem; color: var(--yoruba-brass); font-family: "JetBrains Mono", monospace; font-size: .56rem; letter-spacing: .08em; text-transform: uppercase; }
.yoruba-tutor__turn div { white-space: pre-wrap; }
.yoruba-tutor__form { padding: .8rem; border-top: 1px solid var(--yoruba-line); }
.yoruba-tutor__form textarea { min-height: 5.5rem; padding: .65rem; resize: vertical; }
.yoruba-tutor__actions { display: flex; gap: .45rem; margin-top: .5rem; }
.yoruba-tutor__actions button:first-child { border-color: var(--yoruba-terracotta); background: var(--yoruba-terracotta); }
.yoruba-tutor__actions button:disabled,
.yoruba-tutor__selection button:disabled { opacity: .4; cursor: not-allowed; }
.yoruba-tutor__status { margin: 0; padding: .55rem .8rem; border-top: 1px solid var(--yoruba-line); color: var(--yoruba-muted); font-size: .65rem; }

@media (min-width: 768px) {
  .yoruba-hero-video { display: block; }
  .yoruba-principles { grid-template-columns: repeat(2, 1fr); }
  .yoruba-module-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .yoruba-lesson-arrival { grid-template-columns: 1fr minmax(17rem, .8fr); align-items: end; }
  .yoruba-language-bank { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .yoruba-signal-lab,
  .yoruba-keyboard { grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr); align-items: center; }
  .yoruba-section-head-split { grid-template-columns: 1.45fr .75fr; align-items: end; }
  .yoruba-course-layout { grid-template-columns: minmax(17rem, .72fr) minmax(0, 1.45fr); }
  .yoruba-unit-columns { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .yoruba-culture-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .yoruba-editorial-feature { grid-template-columns: 1.05fr .95fr; }
  .yoruba-assessment-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .yoruba-capstone { grid-template-columns: 1fr 1fr auto; align-items: center; }
  .yoruba-platform-row { grid-template-columns: minmax(11rem, .4fr) 1fr; }
  .yoruba-source-list { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .yoruba-footer { flex-direction: row; align-items: center; }
}

@media (min-width: 1024px) {
  .yoruba-nav nav { display: flex; }
  .yoruba-now { display: block; }
  .yoruba-principles { grid-template-columns: repeat(4, 1fr); }
  .yoruba-principles article { border-right: 1px solid var(--yoruba-line); border-bottom: 0; }
  .yoruba-principles article:last-child { border-right: 0; }
  .yoruba-module-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .yoruba-culture-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .yoruba-source-list { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (max-width: 520px) {
  .yoruba-brand small { display: none; }
  .yoruba-nav-cta { font-size: 0; }
  .yoruba-nav-cta span { font-size: .67rem; }
  .yoruba-hero-stats { grid-template-columns: 1fr; }
  .yoruba-hero-stats div { padding-top: .65rem; }
  .yoruba-hero h1 { font-size: clamp(4.8rem, 28vw, 7rem); }
  .yoruba-handbook-card summary { grid-template-columns: 1fr auto; }
  .yoruba-handbook-card summary span { grid-column: 1 / -1; }
  .yoruba-lesson-chapter { grid-template-columns: 2.7rem 1fr; gap: .75rem; }
  .yoruba-language-bank article { grid-template-columns: 1fr; }
  .yoruba-language-bank p { grid-column: auto; }
  .yoruba-tutor { left: 1rem; right: 1rem; }
  .yoruba-tutor__panel { position: fixed; inset: 4.9rem .5rem .5rem; width: auto; max-height: none; }
  .yoruba-tutor__launcher { float: right; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .yoruba-hero-video { display: none; }
  body[data-yoruba-course] *,
  body[data-yoruba-course] *::before,
  body[data-yoruba-course] *::after { animation-duration: .01ms; animation-iteration-count: 1; transition-duration: .01ms; }
}

@media (max-width: 767px) {
  body[data-yoruba-course]::before { opacity: .04; }
}