/* ── Pinyin & Radicals page styles ─────────────────────── */

.pinyin-page,
.radicals-page,
.new-hsk-page {
  max-width: 860px;
}

.pinyin-section,
.radicals-section,
.new-hsk-section {
  margin-bottom: 2rem;
  padding-top: 0.5rem;
}

.pinyin-section h2,
.radicals-section h2,
.new-hsk-section h2 {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 1.4rem;
  color: var(--ink);
  margin-bottom: 0.75rem;
}

.pinyin-section p,
.radicals-section p,
.new-hsk-section p {
  color: var(--muted);
  line-height: 1.75;
  margin-bottom: 0.75rem;
}

/* ── Tone cards ────────────────────────────────────────── */
.tone-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.75rem;
  margin: 1.25rem 0;
}

.tone-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 1rem 0.75rem;
  text-align: center;
  box-shadow: var(--shadow-sm);
  border-top: 3px solid var(--orange);
}

.tone-1 { border-color: #3b82f6; }
.tone-2 { border-color: #16a34a; }
.tone-3 { border-color: #ca8a04; }
.tone-4 { border-color: #dc2626; }
.tone-5 { border-color: var(--muted); }

.tone-mark {
  font-family: 'DM Mono', monospace;
  font-size: 2rem;
  color: var(--ink);
  line-height: 1;
  margin-bottom: 0.5rem;
}

.tone-num {
  font-family: 'DM Sans', sans-serif;
  font-weight: 700;
  font-size: 0.85rem;
  letter-spacing: 0.05em;
  color: var(--ink);
  margin-bottom: 0.2rem;
}

.tone-desc {
  font-size: 0.8rem;
  color: var(--muted);
  margin-bottom: 0.4rem;
}

.tone-contour {
  font-size: 1.1rem;
  color: var(--orange);
  margin-bottom: 0.5rem;
  letter-spacing: 0.1em;
}

.tone-example {
  font-size: 0.78rem;
  color: var(--muted);
  line-height: 1.3;
}

/* ── Initial / final groups ────────────────────────────── */
.initial-groups,
.finals-groups {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-top: 1.25rem;
}

.initial-group,
.finals-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.group-label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  flex-shrink: 0;
}

.initial-chips,
.finals-chips {
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
}

.initial-chips span,
.finals-chips span {
  font-family: 'DM Mono', monospace;
  font-size: 0.95rem;
  background: var(--white);
  border: 1px solid rgba(249, 115, 22, 0.25);
  border-radius: var(--radius-sm, 4px);
  padding: 0.25rem 0.6rem;
  color: var(--ink);
  box-shadow: var(--shadow-sm);
}

/* ── Tip box ───────────────────────────────────────────── */
.pinyin-tip,
.radicals-tip,
.new-hsk-tip {
  background: rgba(249, 115, 22, 0.06);
  border-left: 3px solid var(--orange);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  padding: 0.85rem 1.1rem;
  font-size: 0.92rem;
  color: var(--ink);
  line-height: 1.6;
  margin-top: 1.25rem;
}

/* ── Rules list ────────────────────────────────────────── */
.rules-list {
  padding-left: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.6;
  margin-bottom: 1rem;
}

.rules-list strong {
  color: var(--ink);
}

/* ── Radicals table ────────────────────────────────────── */
.radicals-table-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  margin-top: 1.25rem;
}

.radicals-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--white);
  font-size: 0.82rem;
}

.radicals-table th {
  background: var(--ink);
  color: var(--white);
  font-family: 'DM Sans', sans-serif;
  font-weight: 700;
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.5rem 0.6rem;
  text-align: left;
}

.radicals-table td {
  padding: 0.4rem 0.6rem;
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
  vertical-align: middle;
}

.radicals-table tr:last-child td {
  border-bottom: none;
}

.radicals-table tbody tr:hover td {
  background: rgba(249, 115, 22, 0.03);
}

.rad-char {
  font-size: 1.4rem;
  color: var(--ink);
}

.rad-strokes {
  color: var(--muted);
  font-size: 0.85rem;
}

.rad-meaning {
  color: var(--ink);
}

.rad-examples {
  color: var(--muted);
  font-size: 0.85rem;
}

.rad-component {
  font-size: 1.2rem;
  color: var(--orange);
  min-width: 2rem;
}

.rad-component:empty::after {
  content: '—';
  font-size: 0.85rem;
  color: var(--muted);
  opacity: 0.4;
}

/* ── New HSK comparison table ──────────────────────────── */
.comparison-table-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  margin-top: 1.25rem;
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--white);
}

.comparison-table th {
  background: var(--ink);
  color: var(--white);
  font-family: 'DM Sans', sans-serif;
  font-weight: 700;
  font-size: 0.72rem;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  padding: 0.5rem 0.65rem;
  text-align: left;
}

.comparison-table th.old-hsk {
  background: #374151;
}

.comparison-table th.new-hsk {
  background: var(--orange);
}

.comparison-table td {
  padding: 0.5rem 0.65rem;
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
  color: var(--muted);
  font-size: 0.85rem;
}

.comparison-table td:first-child {
  font-weight: 600;
  color: var(--ink);
  white-space: nowrap;
}

.comparison-table tr:last-child td {
  border-bottom: none;
}

/* ── Pinyin combination table ───────────────────────────── */
.pinyin-combo-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  margin-top: 1.25rem;
}

.pinyin-combo-table {
  border-collapse: collapse;
  background: var(--white);
  font-size: 0.72rem;
  white-space: nowrap;
}

.combo-corner {
  background: var(--ink);
  color: rgba(255,255,255,0.45);
  font-size: 0.62rem;
  font-weight: 400;
  line-height: 1.4;
  padding: 0.5rem 0.6rem;
  text-align: center;
  min-width: 3.2rem;
}

.combo-group-head {
  background: var(--orange);
  color: #fff;
  font-family: 'DM Sans', sans-serif;
  font-weight: 700;
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 0.35rem 0.5rem;
  text-align: center;
  border-right: 2px solid rgba(255,255,255,0.2);
}

.combo-group-head:last-child { border-right: none; }

.combo-final {
  background: var(--ink);
  color: rgba(255,255,255,0.85);
  font-family: 'DM Mono', monospace;
  font-size: 0.72rem;
  padding: 0.35rem 0.45rem;
  text-align: center;
  min-width: 1.9rem;
}

.combo-final.combo-gs {
  border-left: 2px solid rgba(249,115,22,0.5);
}

.combo-initial {
  background: var(--ink);
  color: rgba(255,255,255,0.9);
  font-family: 'DM Mono', monospace;
  font-size: 0.8rem;
  padding: 0.3rem 0.65rem;
  text-align: center;
  position: sticky;
  left: 0;
  z-index: 2;
  border-right: 2px solid rgba(249,115,22,0.35);
  min-width: 2.6rem;
}

.combo-zero {
  font-size: 0.72rem;
  opacity: 0.55;
}

tr.combo-row-gs .combo-initial,
tr.combo-row-gs td {
  border-top: 2px solid rgba(249,115,22,0.2);
}

.combo-cell {
  font-family: 'DM Mono', monospace;
  text-align: center;
  padding: 0.28rem 0.35rem;
  color: var(--ink);
  border: 1px solid rgba(0,0,0,0.04);
  cursor: default;
  transition: background 0.1s, color 0.1s;
}

.combo-cell:hover {
  background: rgba(249,115,22,0.1);
  color: var(--orange);
}

.combo-cell.combo-gs,
.combo-empty.combo-gs {
  border-left: 2px solid rgba(249,115,22,0.18);
}

.combo-empty {
  background: rgba(0,0,0,0.035);
  border: 1px solid rgba(0,0,0,0.03);
}

/* ── Desktop enhancements ──────────────────────────────── */
@media (min-width: 600px) {
  .pinyin-section,
  .radicals-section,
  .new-hsk-section {
    margin-bottom: 3rem;
  }

  .pinyin-section h2,
  .radicals-section h2,
  .new-hsk-section h2 {
    font-size: 1.6rem;
  }

  .tone-grid {
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 1rem;
    margin: 1.5rem 0;
  }

  .tone-card {
    padding: 1.25rem 1rem;
  }

  .tone-mark {
    font-size: 2.5rem;
  }

  .initial-group,
  .finals-group {
    flex-direction: row;
    align-items: baseline;
    gap: 1rem;
  }

  .group-label {
    min-width: 160px;
  }

  .radicals-table {
    font-size: 0.9rem;
  }

  .radicals-table th {
    font-size: 0.78rem;
    padding: 0.65rem 0.85rem;
  }

  .radicals-table td {
    padding: 0.5rem 0.85rem;
  }

  .rad-char {
    font-size: 1.6rem;
  }

  .rad-component {
    font-size: 1.4rem;
    min-width: 2.5rem;
  }

  .comparison-table th {
    font-size: 0.8rem;
    padding: 0.75rem 1rem;
  }

  .comparison-table td {
    padding: 0.65rem 1rem;
    font-size: 0.9rem;
  }
}