/* ══════════════════════════════════════════════════════════
   Alfabeto editorial — Hangul, capítulo 01
   Scoped bajo .alfabeto-editorial. Hereda tokens globales.
   ══════════════════════════════════════════════════════════ */

.alfabeto-editorial,
.lectura-editorial,
.numeros-editorial {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  /* Cinturón de seguridad: si algún descendiente desborda en horizontal
   * (típicamente grid items con min-content > 1fr track), lo recortamos
   * aquí en vez de delegar al body. */
  overflow-x: hidden;
  max-width: 100%;
}

/* Grid items: por defecto tienen min-width: auto (≈ min-content), lo
 * que fuerza al grid a crecer cuando el contenido tiene chars/words
 * más anchos que el track 1fr. Esto los deja encogerse correctamente. */
.af-hero-grid > *,
.af-explorer-grid > *,
.af-strokes-grid > *,
.af-blocks-grid > *,
.af-method-grid > *,
.af-words-grid > *,
.af-table-grid > *,
.af-practice-grid > *,
.af-quiz-grid > *,
.af-letter-grid > *,
.af-letter-grid--small > *,
.af-letter-grid--phrases > *,
.af-stats-grid > *,
.af-stats-table > * {
  min-width: 0;
}

/* ─── Bloques comunes ──────────────────────────────────── */
.af-section-tag {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--accent);
  text-transform: uppercase;
  font-weight: 500;
}
.af-section-tag::before { content: '// '; }

.af-h2 {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 5vw, 3.5rem);
  line-height: 1;
  letter-spacing: -.035em;
  margin: 12px 0 0;
  font-weight: 400;
  color: var(--text);
  text-wrap: pretty;
}
.af-h2 em { color: var(--accent); font-style: italic; font-weight: 400; }
.af-h2--big { font-size: clamp(2.6rem, 6vw, 4.5rem); line-height: .95; }
.af-h3 {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3vw, 2rem);
  letter-spacing: -.025em;
  margin: 8px 0 0;
  font-weight: 400;
}

.af-block-body {
  font-size: 15px;
  line-height: 1.65;
  color: var(--text-muted);
  margin: 18px 0 0;
  max-width: 340px;
  text-wrap: pretty;
}
.af-block-body--wide { max-width: 640px; }
.af-block-body em { color: var(--text); font-style: italic; }

.af-sep { color: var(--text-very-dim); margin: 0 4px; }
.af-cat { color: var(--accent); }

/* ─── Hero ─────────────────────────────────────────────── */
.af-hero {
  position: relative;
  padding: 64px 56px 80px;
  border-bottom: 1px solid var(--border);
  overflow: hidden;
  max-width: 1440px;
  margin: 0 auto;
}
.af-hero-bg {
  position: absolute;
  right: -120px;
  top: -80px;
  font-family: var(--font-korean);
  font-size: clamp(320px, 50vw, 720px);
  color: rgba(232, 67, 45, .05);
  line-height: .85;
  font-weight: 700;
  pointer-events: none;
  user-select: none;
  z-index: 0;
}
.af-hero-inner { position: relative; z-index: 1; }

.af-breadcrumb {
  display: flex;
  align-items: baseline;
  gap: 12px;
  flex-wrap: wrap;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 36px;
}
.af-breadcrumb a { color: var(--text-dim); transition: color .15s; }
.af-breadcrumb a:hover { color: var(--text); }

.af-hero-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 80px;
  align-items: end;
}
.af-title {
  font-family: var(--font-display);
  font-size: clamp(3rem, 9vw, 8.5rem);
  line-height: .92;
  letter-spacing: -.04em;
  margin: 0;
  font-weight: 400;
  text-wrap: pretty;
  color: var(--text);
}
.af-title em { color: var(--accent); font-style: italic; font-weight: 400; }
.af-lead {
  font-size: 17px;
  line-height: 1.6;
  color: var(--text-muted);
  margin: 32px 0 0;
  max-width: 540px;
  text-wrap: pretty;
}

.af-stats-card {
  border: 1px solid var(--border-strong);
  background: var(--surface);
  padding: 28px 28px 22px;
}
.af-stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 22px;
  padding-bottom: 22px;
  border-bottom: 1px solid var(--border);
}
.af-stat-n {
  font-family: var(--font-display);
  font-size: clamp(40px, 4vw, 56px);
  color: var(--accent);
  line-height: 1;
  font-weight: 500;
  letter-spacing: -.03em;
}
.af-stat-l {
  font-family: var(--font-mono);
  font-size: 9px;
  color: var(--text-dim);
  margin-top: 10px;
  letter-spacing: .08em;
  text-transform: uppercase;
}
.af-stats-table {
  margin: 20px 0 0;
  display: grid;
  grid-template-columns: 1fr auto;
  row-gap: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
}
.af-stats-table dt {
  color: var(--text-dim);
  letter-spacing: .06em;
  text-transform: uppercase;
  margin: 0;
  padding: 4px 0;
  border-bottom: 1px dashed var(--border);
}
.af-stats-table dd {
  color: var(--text);
  margin: 0;
  padding: 4px 0;
  text-align: right;
  border-bottom: 1px dashed var(--border);
}
.af-stats-table dt:last-of-type,
.af-stats-table dd:last-of-type { border-bottom: 0; }

/* ─── Letter explorer ──────────────────────────────────── */
.af-explorer {
  padding: 72px 56px;
  border-bottom: 1px solid var(--border);
  max-width: 1440px;
  margin: 0 auto;
  position: relative;
  overflow: hidden;
}
.af-explorer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 56px;
}

.af-block-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 24px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}
.af-block-head--small { margin-top: 56px; margin-bottom: 14px; }
.af-block-hint {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-dim);
  letter-spacing: .06em;
  text-transform: uppercase;
  max-width: 240px;
  text-align: right;
}

/* Filter tabs (consonants) */
.af-filter {
  display: flex;
  gap: 0;
  flex-wrap: wrap;
}
.af-filter-btn {
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--text-muted);
  padding: 6px 14px 10px;
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .07em;
  text-transform: uppercase;
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  transition: color .2s, border-color .2s;
}
.af-filter-btn:hover { color: var(--text); }
.af-filter-btn.is-active {
  color: var(--text);
  border-bottom-color: var(--accent);
}
.af-filter-n { font-size: 9px; color: var(--text-very-dim); transition: color .2s; }
.af-filter-btn.is-active .af-filter-n,
.af-filter-btn:hover .af-filter-n { color: var(--accent); }

/* Letter grid + cards */
.af-letter-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 8px;
  margin-bottom: 32px;
}
.af-letter-grid--small {
  grid-template-columns: repeat(6, 1fr);
  gap: 6px;
}
.af-letter {
  background: var(--surface);
  border: 1px solid var(--border-strong);
  padding: 20px 14px 16px;
  cursor: pointer;
  color: inherit;
  text-align: left;
  position: relative;
  transition: background .2s, border-color .2s, transform .15s;
}
.af-letter:hover {
  border-color: var(--accent);
  transform: translateY(-1px);
}
.af-letter.is-active {
  background: var(--accent);
  border-color: var(--accent);
}
.af-letter.is-active .af-letter-char,
.af-letter.is-active .af-letter-rom { color: #fff; }
.af-letter--small { padding: 14px 10px 12px; }
.af-letter--hidden { display: none; }

.af-letter-char {
  display: block;
  font-family: var(--font-korean);
  font-size: 52px;
  line-height: 1;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -.02em;
  transition: color .2s;
}
.af-letter--small .af-letter-char { font-size: 36px; }
.af-letter-rom {
  display: block;
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .04em;
  color: var(--text-muted);
  transition: color .2s;
}
.af-letter--small .af-letter-rom { font-size: 10px; margin-top: 8px; }

/* Dot indicator (consonant category) */
.af-letter-dot {
  position: absolute;
  top: 8px;
  right: 10px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--accent);
}
.af-letter--aspirada .af-letter-dot { background: #D4AF37; }
.af-letter--tensa .af-letter-dot { background: #7AB4A0; }
.af-letter.is-active .af-letter-dot { background: #fff; }

.af-legend {
  margin-top: 24px;
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-dim);
  letter-spacing: .06em;
  text-transform: uppercase;
}
.af-legend-item { display: inline-flex; align-items: center; gap: 8px; }
.af-legend-dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--accent);
}
.af-legend-item--aspirada .af-legend-dot { background: #D4AF37; }
.af-legend-item--tensa .af-legend-dot { background: #7AB4A0; }

/* Detail card (sticky) */
.af-detail {
  position: sticky;
  top: 110px;
  align-self: start;
  border: 1px solid var(--border-strong);
  background: var(--surface);
  padding: 36px 36px 32px;
  min-height: 540px;
  position: sticky;
  overflow: hidden;
}
.af-detail-bg {
  position: absolute;
  right: -40px;
  bottom: -100px;
  font-family: var(--font-korean);
  font-size: 380px;
  color: rgba(232, 67, 45, .07);
  line-height: .85;
  font-weight: 700;
  pointer-events: none;
}
.af-detail-inner { position: relative; }
.af-detail-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
  flex-wrap: wrap;
}
.af-detail-count {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-very-dim);
  letter-spacing: .06em;
  text-transform: uppercase;
}
.af-detail-char {
  font-family: var(--font-korean);
  font-size: clamp(160px, 16vw, 220px);
  line-height: 1;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -.03em;
  margin: 8px 0 4px;
}
.af-detail-rom {
  font-family: var(--font-display);
  font-size: clamp(36px, 4vw, 56px);
  color: var(--accent);
  font-style: italic;
  font-weight: 500;
  letter-spacing: -.025em;
  line-height: 1;
  margin-bottom: 24px;
}
.af-detail-stats {
  margin: 0;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  display: grid;
  grid-template-columns: auto 1fr;
  row-gap: 14px;
  column-gap: 24px;
  font-family: var(--font-mono);
  font-size: 11px;
}
.af-detail-stats dt {
  color: var(--text-dim);
  letter-spacing: .06em;
  text-transform: uppercase;
  margin: 0;
}
.af-detail-stats dd {
  color: var(--text);
  margin: 0;
}
.af-detail-stats #af-detail-ex {
  font-family: var(--font-display);
  font-size: 16px;
  letter-spacing: -.005em;
  font-style: italic;
}
.af-detail-actions {
  margin-top: 28px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
}

/* Buttons */
.af-btn {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .07em;
  text-transform: uppercase;
  padding: 12px 16px;
  border-radius: 3px;
  display: inline-flex;
  align-items: center;
  gap: 14px;
  cursor: pointer;
  border: 1px solid var(--border-strong);
  background: transparent;
  color: var(--text-muted);
  transition: border-color .15s, color .15s, background .15s;
  text-decoration: none;
}
.af-btn:hover { border-color: var(--accent); color: var(--accent); }
.af-btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
.af-btn-primary:hover { background: transparent; color: var(--accent); }
.af-btn-ghost { color: var(--text-muted); }

/* Icono ASCII '>' del botón de audio: el carácter es fino,
 * lo hacemos monospace y un pelín bold para que pese visualmente. */
.af-btn-icon {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 14px;
  margin-left: 2px;
}

/* ─── Stroke order ─────────────────────────────────────── */
.af-strokes {
  padding: 80px 56px;
  border-bottom: 1px solid var(--border);
  max-width: 1440px;
  margin: 0 auto;
}
.af-strokes-grid {
  display: grid;
  grid-template-columns: 380px 1fr;
  gap: 72px;
  align-items: start;
}
.af-strokes-intro { position: sticky; top: 110px; }

.af-rules {
  border: 1px solid var(--border-strong);
  background: var(--surface);
}
.af-rules-head {
  padding: 14px 22px;
  border-bottom: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--accent);
  letter-spacing: .07em;
  text-transform: uppercase;
}
.af-rules-row {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 24px;
  padding: 16px 22px;
  border-bottom: 1px solid var(--border);
  align-items: baseline;
}
.af-rules-row.is-last { border-bottom: 0; }
.af-rules-t {
  font-family: var(--font-display);
  font-size: 18px;
  color: var(--text);
  font-weight: 400;
  letter-spacing: -.015em;
}
.af-rules-b {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.55;
}

.af-stroke-examples {
  margin-top: 18px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}
.af-stroke-ex {
  background: var(--surface);
  border: 1px solid var(--border-strong);
  padding: 22px 18px;
}
.af-stroke-ex-h {
  font-family: var(--font-korean);
  font-size: 64px;
  font-weight: 700;
  color: var(--text);
  line-height: 1;
  letter-spacing: -.02em;
}
.af-stroke-ex-list {
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-muted);
  letter-spacing: .03em;
  line-height: 1.7;
}

/* ─── Block types ──────────────────────────────────────── */
.af-blocks {
  position: relative;
  padding: 80px 56px;
  border-bottom: 1px solid var(--border);
  overflow: hidden;
  max-width: 1440px;
  margin: 0 auto;
}
.af-blocks-bg {
  position: absolute;
  right: -60px;
  top: 20px;
  font-family: var(--font-korean);
  font-size: clamp(280px, 40vw, 520px);
  color: rgba(232, 67, 45, .04);
  line-height: .85;
  font-weight: 700;
  pointer-events: none;
}
.af-blocks-inner { position: relative; }
.af-blocks-grid {
  margin-top: 32px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}
.af-block-card {
  background: var(--surface);
  border: 1px solid var(--border-strong);
  padding: 24px 22px;
  position: relative;
}
.af-block-han {
  margin-top: 14px;
  font-family: var(--font-korean);
  font-size: 88px;
  font-weight: 700;
  color: var(--text);
  line-height: 1;
}
.af-block-parts {
  margin-top: 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-muted);
  letter-spacing: .03em;
}
.af-block-layout {
  margin-top: 4px;
  font-family: var(--font-display);
  font-size: 14px;
  color: var(--text-dim);
  font-style: italic;
}

/* ─── Composición ──────────────────────────────────────── */
.af-composition {
  padding: 80px 56px;
  border-bottom: 1px solid var(--border);
  max-width: 1440px;
  margin: 0 auto;
}
.af-comp-list {
  margin-top: 32px;
  border: 1px solid var(--border-strong);
  background: var(--surface);
}
.af-comp-row {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 24px;
  padding: 24px 28px;
  border-bottom: 1px solid var(--border);
  align-items: center;
}
.af-comp-row.is-last { border-bottom: 0; }
.af-comp-h {
  font-family: var(--font-korean);
  font-size: 64px;
  color: var(--text);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.02em;
}
.af-comp-body {
  display: flex;
  align-items: baseline;
  gap: 14px;
  flex-wrap: wrap;
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--text);
  letter-spacing: .03em;
}
.af-comp-eq { color: var(--accent); }
.af-comp-sep { color: var(--text-very-dim); }
.af-comp-note {
  font-family: var(--font-display);
  font-size: 15px;
  color: var(--text-muted);
  font-style: italic;
}

/* ─── Método + PDF ─────────────────────────────────────── */
.af-method {
  padding: 80px 56px;
  border-bottom: 1px solid var(--border);
  max-width: 1440px;
  margin: 0 auto;
}
.af-method-grid {
  display: grid;
  grid-template-columns: 380px 1fr;
  gap: 72px;
  align-items: start;
}
.af-method-intro { position: sticky; top: 110px; }

.af-pdf-cta {
  margin-top: 28px;
  background: var(--accent);
  border: 1px solid var(--accent);
  color: #fff;
  padding: 16px 18px;
  border-radius: 3px;
  cursor: pointer;
  display: grid;
  grid-template-columns: 28px 1fr;
  gap: 14px;
  align-items: center;
  text-align: left;
  width: 100%;
  transition: background .15s, color .15s;
}
.af-pdf-cta:hover { background: transparent; color: var(--accent); }
.af-pdf-icon {
  font-size: 22px;
  text-align: center;
}
.af-pdf-text strong {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .07em;
  text-transform: uppercase;
  font-weight: 600;
}
.af-pdf-text small {
  display: block;
  margin-top: 6px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .04em;
  opacity: .85;
  text-transform: none;
}

.af-method-list {
  list-style: none;
  margin: 0;
  padding: 0;
}
.af-method-step {
  display: grid;
  grid-template-columns: 60px 1fr auto;
  gap: 28px;
  align-items: baseline;
  padding: 28px 0;
  border-bottom: 1px solid var(--border);
}
.af-method-step:first-child { border-top: 1px solid var(--border); }
.af-method-step:last-child { border-bottom: 0; }
.af-method-n {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--accent);
  letter-spacing: .06em;
}
.af-method-t {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(20px, 2.5vw, 28px);
  font-weight: 400;
  letter-spacing: -.025em;
  line-height: 1.1;
  color: var(--text);
}
.af-method-d {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.65;
  color: var(--text-muted);
  max-width: 560px;
}
.af-method-arrow { color: var(--accent); font-size: 22px; }

/* ─── Palabras ─────────────────────────────────────────── */
.af-words {
  position: relative;
  padding: 80px 56px;
  border-bottom: 1px solid var(--border);
  overflow: hidden;
  max-width: 1440px;
  margin: 0 auto;
}
.af-words-bg {
  position: absolute;
  left: -40px;
  top: -40px;
  font-family: var(--font-korean);
  font-size: clamp(220px, 30vw, 380px);
  color: rgba(232, 67, 45, .05);
  line-height: .85;
  font-weight: 700;
  pointer-events: none;
}
.af-words-inner { position: relative; }
.af-words-grid {
  margin-top: 32px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}
.af-word-card {
  background: var(--surface);
  border: 1px solid var(--border-strong);
  padding: 24px 22px;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 22px;
  align-items: center;
}
.af-word-h {
  font-family: var(--font-korean);
  font-size: 56px;
  color: var(--text);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.02em;
}
.af-word-r {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--accent);
  letter-spacing: .05em;
}
.af-word-m {
  margin-top: 6px;
  font-size: 13px;
  line-height: 1.5;
  color: var(--text-muted);
}

/* ─── Tabla de sílabas ─────────────────────────────────── */
.af-table {
  padding: 80px 56px;
  border-bottom: 1px solid var(--border);
  max-width: 1440px;
  margin: 0 auto;
}
.af-table-grid {
  display: grid;
  grid-template-columns: 380px 1fr;
  gap: 72px;
  align-items: start;
}
.af-table-intro { position: sticky; top: 110px; }
.af-table-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}
.af-syllable-table {
  display: grid;
  border: 1px solid var(--border-strong);
  background: var(--surface);
  min-width: 520px;
}
.af-syl-head {
  padding: 14px 12px;
  text-align: center;
  font-family: var(--font-korean);
  font-size: 20px;
  font-weight: 700;
  color: var(--accent);
  border-bottom: 1px solid var(--border);
  border-right: 1px solid var(--border);
}
.af-syl-head:last-child { border-right: 0; }
.af-syl-head--corner {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: .07em;
  color: var(--accent);
  text-transform: uppercase;
}
.af-syl-row-h {
  padding: 18px 12px;
  text-align: center;
  font-family: var(--font-korean);
  font-size: 20px;
  color: var(--text-muted);
  font-weight: 700;
  border-bottom: 1px solid var(--border);
  border-right: 1px solid var(--border);
}
.af-syl-cell {
  padding: 18px 12px;
  text-align: center;
  font-family: var(--font-korean);
  font-size: 28px;
  color: var(--text);
  font-weight: 700;
  letter-spacing: -.01em;
  border-bottom: 1px solid var(--border);
  border-right: 1px solid var(--border);
  cursor: pointer;
  transition: background .15s, color .15s;
}
.af-syl-cell:hover { background: rgba(232, 67, 45, .08); color: var(--accent); }
.af-syllable-table > *:nth-last-child(-n+6) { border-bottom: 0; }
.af-syllable-table > *:nth-child(6n) { border-right: 0; }

/* ─── Práctica (3 cards CTA) ───────────────────────────── */
.af-practice {
  padding: 80px 56px;
  border-bottom: 1px solid var(--border);
  max-width: 1440px;
  margin: 0 auto;
}
.af-practice-grid {
  margin-top: 36px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}
.af-practice-card {
  background: var(--bg2);
  border: 1px solid var(--border-strong);
  padding: 32px 28px;
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 280px;
  cursor: pointer;
  text-align: left;
  color: inherit;
  font-family: inherit;
  transition: border-color .2s, transform .2s;
}
.af-practice-card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}
.af-practice-han {
  position: absolute;
  right: -20px;
  bottom: -60px;
  font-family: var(--font-korean);
  font-size: 200px;
  color: rgba(232, 67, 45, .07);
  line-height: .85;
  font-weight: 700;
  pointer-events: none;
}
.af-practice-body {
  position: relative;
  display: block;
}
.af-practice-t {
  display: block;
  margin: 12px 0 14px;
  font-family: var(--font-display);
  font-size: clamp(22px, 2.3vw, 28px);
  font-weight: 400;
  letter-spacing: -.025em;
  line-height: 1.1;
  color: var(--text);
}
.af-practice-d {
  display: block;
  font-size: 14px;
  line-height: 1.65;
  color: var(--text-muted);
  max-width: 320px;
}
.af-practice-foot {
  position: relative;
  margin-top: 22px;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
}
.af-practice-cta {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .07em;
  text-transform: uppercase;
  color: var(--accent);
}
.af-practice-pill {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--text-dim);
  border: 1px solid var(--border);
  padding: 4px 8px;
  border-radius: 2px;
}

/* ─── FAQ ──────────────────────────────────────────────── */
.af-faq {
  padding: 80px 56px;
  border-bottom: 1px solid var(--border);
  max-width: 1440px;
  margin: 0 auto;
}
.af-faq-list {
  margin-top: 32px;
}
.af-faq-item {
  border-top: 1px solid var(--border);
}
.af-faq-item:last-child { border-bottom: 1px solid var(--border); }
.af-faq-q {
  list-style: none;
  cursor: pointer;
  padding: 24px 0;
  display: grid;
  grid-template-columns: 60px 1fr auto;
  gap: 24px;
  align-items: baseline;
}
.af-faq-q::-webkit-details-marker { display: none; }
.af-faq-n {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-very-dim);
  letter-spacing: .06em;
  transition: color .2s;
}
.af-faq-item[open] .af-faq-n { color: var(--accent); }
.af-faq-text {
  font-family: var(--font-display);
  font-size: clamp(20px, 2.5vw, 28px);
  font-weight: 400;
  letter-spacing: -.025em;
  line-height: 1.15;
  color: var(--text);
}
.af-faq-plus {
  color: var(--accent);
  font-size: 22px;
  width: 16px;
  text-align: center;
  transition: transform .25s;
}
.af-faq-item[open] .af-faq-plus { transform: rotate(45deg); }
.af-faq-a {
  margin: 0;
  padding: 0 0 26px 84px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-muted);
  max-width: 780px;
}

/* ─── Quiz ─────────────────────────────────────────────── */
.af-quiz {
  position: relative;
  padding: 100px 56px;
  border-bottom: 1px solid var(--border);
  overflow: hidden;
  max-width: 1440px;
  margin: 0 auto;
}
.af-quiz-bg {
  position: absolute;
  right: -40px;
  top: -80px;
  font-family: var(--font-korean);
  font-size: clamp(320px, 45vw, 560px);
  color: rgba(232, 67, 45, .05);
  line-height: .85;
  font-weight: 700;
  pointer-events: none;
}
.af-quiz-grid {
  position: relative;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}
.af-quiz-status {
  margin-top: 22px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-dim);
  letter-spacing: .07em;
  text-transform: uppercase;
}
.af-quiz-hint { color: var(--accent); }

.af-quiz-card {
  border: 1px solid var(--border-strong);
  background: var(--surface);
  padding: 40px 40px 32px;
}
.af-quiz-prompt {
  text-align: center;
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-dim);
  letter-spacing: .07em;
  text-transform: uppercase;
}
.af-quiz-char {
  text-align: center;
  font-family: var(--font-korean);
  font-size: clamp(140px, 18vw, 220px);
  font-weight: 700;
  color: var(--text);
  line-height: 1;
  letter-spacing: -.04em;
  margin-top: 8px;
  transition: color .3s;
}
.af-quiz-card.is-correct .af-quiz-char { color: var(--accent); }

.af-quiz-opts {
  margin-top: 28px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}
.af-quiz-opt {
  background: transparent;
  border: 1px solid var(--border-strong);
  color: var(--text);
  padding: 16px 18px;
  cursor: pointer;
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 400;
  letter-spacing: -.015em;
  text-align: center;
  transition: background .2s, border-color .2s, color .2s;
}
.af-quiz-opt:hover:not(:disabled) {
  border-color: var(--accent);
  color: var(--accent);
}
.af-quiz-opt.is-correct {
  background: rgba(232, 67, 45, .12);
  border-color: var(--accent);
  color: var(--accent);
}
.af-quiz-opt.is-wrong {
  border-color: var(--text-dim);
  color: var(--text-muted);
  background: rgba(255, 255, 255, .03);
}
.af-quiz-opt:disabled { cursor: default; }

.af-quiz-foot {
  margin-top: 24px;
  padding-top: 18px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-dim);
  letter-spacing: .06em;
  text-transform: uppercase;
  gap: 12px;
}
.af-quiz-feedback.is-correct { color: var(--accent); }
.af-quiz-feedback.is-wrong { color: var(--text-muted); }
.af-quiz-next {
  background: transparent;
  border: none;
  color: var(--accent);
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .07em;
  text-transform: uppercase;
  padding: 0;
}
.af-quiz-next:disabled { color: var(--text-very-dim); cursor: default; }

/* ─── Next chapter CTA ─────────────────────────────────── */
.af-next {
  position: relative;
  padding: 100px 56px;
  overflow: hidden;
  max-width: 1440px;
  margin: 0 auto;
}
.af-next-bg {
  position: absolute;
  right: -60px;
  top: -100px;
  font-family: var(--font-korean);
  font-size: clamp(280px, 35vw, 460px);
  color: rgba(232, 67, 45, .05);
  line-height: .85;
  font-weight: 700;
  pointer-events: none;
}
.af-next-inner { position: relative; max-width: 920px; }
.af-next-title {
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 6vw, 5rem);
  margin: 14px 0 0;
  font-weight: 400;
  letter-spacing: -.035em;
  line-height: .95;
  color: var(--text);
}
.af-next-title em { color: var(--accent); font-style: italic; }
.af-next-cta {
  margin-top: 32px;
  background: var(--accent);
  color: #fff;
  border: 1px solid var(--accent);
  padding: 18px 26px;
  border-radius: 3px;
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  text-transform: uppercase;
  display: inline-flex;
  align-items: center;
  gap: 22px;
  text-decoration: none;
  transition: background .15s, color .15s;
}
.af-next-cta:hover { background: transparent; color: var(--accent); }

/* ─── RESPONSIVE ───────────────────────────────────────── */
@media (max-width: 1100px) {
  .af-hero,
  .af-explorer,
  .af-strokes,
  .af-blocks,
  .af-composition,
  .af-method,
  .af-words,
  .af-table,
  .af-practice,
  .af-faq,
  .af-quiz,
  .af-next { padding-left: 32px; padding-right: 32px; }

  .af-hero-grid,
  .af-explorer-grid,
  .af-strokes-grid,
  .af-method-grid,
  .af-table-grid,
  .af-quiz-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .af-detail,
  .af-strokes-intro,
  .af-method-intro,
  .af-table-intro { position: static; }
  .af-letter-grid { grid-template-columns: repeat(5, 1fr); }
  .af-letter-grid--small { grid-template-columns: repeat(6, 1fr); }
  .af-blocks-grid,
  .af-words-grid,
  .af-practice-grid,
  .af-stroke-examples { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 860px) {
  .af-hero,
  .af-explorer,
  .af-strokes,
  .af-blocks,
  .af-composition,
  .af-method,
  .af-words,
  .af-table,
  .af-practice,
  .af-faq,
  .af-quiz,
  .af-next { padding-left: 22px; padding-right: 22px; padding-top: 48px; padding-bottom: 48px; }

  .af-letter-grid { grid-template-columns: repeat(4, 1fr); gap: 6px; }
  .af-letter-grid--small { grid-template-columns: repeat(4, 1fr); }
  .af-letter { padding: 14px 8px 10px; }
  .af-letter-char { font-size: 36px; }
  .af-letter-rom { font-size: 10px; margin-top: 8px; }

  .af-block-head { flex-direction: column; align-items: flex-start; gap: 12px; }
  .af-block-hint { text-align: left; max-width: 100%; }
  .af-filter { width: 100%; overflow-x: auto; flex-wrap: nowrap; }
  .af-filter-btn { flex-shrink: 0; }

  .af-detail { padding: 24px 22px; min-height: 0; }
  .af-detail-char { font-size: 140px; }
  .af-detail-rom { font-size: 36px; margin-bottom: 16px; }

  .af-rules-row { grid-template-columns: 1fr; gap: 6px; padding: 14px 18px; }
  .af-stroke-examples { grid-template-columns: repeat(2, 1fr); }
  .af-blocks-grid { grid-template-columns: 1fr 1fr; }
  .af-comp-row { grid-template-columns: 80px 1fr; gap: 16px; padding: 18px 18px; }
  .af-comp-h { font-size: 48px; }
  .af-comp-body { font-size: 13px; }

  .af-method-step { grid-template-columns: 40px 1fr; gap: 14px; padding: 18px 0; }
  .af-method-step .af-method-arrow { display: none; }

  .af-words-grid,
  .af-practice-grid { grid-template-columns: 1fr; }
  .af-word-card { padding: 18px 16px; gap: 14px; }
  .af-word-h { font-size: 44px; }

  .af-syllable-table {
    grid-template-columns: 48px repeat(5, minmax(48px, 1fr)) !important;
    min-width: 0;
  }
  .af-syl-head,
  .af-syl-row-h { font-size: 16px; padding: 10px 6px; }
  .af-syl-cell { font-size: 22px; padding: 12px 6px; }

  .af-faq-q { grid-template-columns: 30px 1fr 16px; gap: 14px; padding: 18px 0; }
  .af-faq-a { padding: 0 0 20px 44px; }

  .af-quiz-card { padding: 24px 22px 20px; }
  .af-quiz-char { font-size: 140px; }
  .af-quiz-opts { gap: 8px; }
  .af-quiz-opt { font-size: 18px; padding: 14px 12px; }
  .af-quiz-foot { flex-direction: column; align-items: flex-start; gap: 8px; }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  .af-letter,
  .af-quiz-char,
  .af-quiz-opt,
  .af-faq-plus,
  .af-practice-card,
  .af-pdf-cta,
  .af-next-cta { transition-duration: 100ms !important; }
}

/* Performance below-the-fold */
.af-words,
.af-table,
.af-practice,
.af-faq,
.af-quiz,
.af-next {
  content-visibility: auto;
  contain-intrinsic-size: auto 700px;
}