/* ═══════════════════════════════════════════════════════════════════════════
   Academic theme — refined dark, typographic reference-manual aesthetic
   Loaded after styles.css; does not change app logic or chord data.
   ═══════════════════════════════════════════════════════════════════════════ */

body.theme-academic {
  --bg: #121110;
  --bg2: #1a1816;
  --bg3: #222018;
  --bg4: #2a261e;
  --border: #333028;
  --border2: #454038;
  --text: #e4dfd4;
  --text2: #a8a090;
  --text3: #6e6860;
  --gold: #7a8fa8;
  --gold2: #8a9aaa;
  --accent-light: rgba(122, 143, 168, 0.12);

  --c-root: #4a9ede;
  --c-3rd: #5eb854;
  --c-b3: #5eb854;
  --c-b7: #e09030;
  --c-9th: #9b7ed4;
  --c-s9: #d45030;
  --c-b5: #d87848;
  --c-13th: #30a880;
  --c-m7: #30a880;

  --c-root-bg: #1a3a52;
  --c-3rd-bg: #1e3e1a;
  --c-b7-bg: #4a2e0a;
  --c-9th-bg: #2e2048;
  --c-s9-bg: #4a1a0a;
  --c-13th-bg: #0a3028;
  --c-m7-bg: #0a3028;

  --font-serif: Georgia, 'Times New Roman', 'Palatino Linotype', serif;
  --font-sans: 'Source Sans 3', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'IBM Plex Mono', 'Consolas', monospace;

  --radius: 2px;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
}

body.theme-academic {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.65;
}

/* ── Header ── */
body.theme-academic .site-header {
  padding: 28px 48px 24px;
  background: var(--bg2);
  border-bottom: 2px solid var(--border);
  box-shadow: none;
}
body.theme-academic .site-header::before { display: none; }
body.theme-academic .site-header h1 {
  font-family: var(--font-serif);
  font-size: 26px;
  font-weight: 700;
  color: var(--text);
  letter-spacing: 0.01em;
  margin-bottom: 4px;
}
body.theme-academic .site-header .subtitle {
  font-size: 13px;
  color: var(--text3);
  font-weight: 400;
  letter-spacing: 0.02em;
  max-width: 52em;
}

/* ── Tabs ── */
body.theme-academic .tab-bar {
  background: var(--bg2);
  border-bottom: 1px solid var(--border);
  padding: 0 48px;
  top: 0;
}
body.theme-academic .tab-btn {
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 600;
  color: var(--text3);
  padding: 12px 16px 10px;
  border-bottom: 2px solid transparent;
  letter-spacing: 0.02em;
}
body.theme-academic .tab-btn:hover { color: var(--text2); }
body.theme-academic .tab-btn.active {
  color: var(--gold2);
  border-bottom-color: var(--gold2);
}

/* ── Nav bars ── */
body.theme-academic .key-nav,
body.theme-academic .prog-top-nav,
body.theme-academic .legend,
body.theme-academic .theory-nav {
  background: var(--bg3);
  border-bottom: 1px solid var(--border);
  padding: 10px 48px;
}
body.theme-academic .key-nav a,
body.theme-academic .prog-top-nav a,
body.theme-academic .theory-nav a {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  color: var(--text2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg2);
  padding: 4px 10px;
}
body.theme-academic .key-nav a:hover,
body.theme-academic .prog-top-nav a:hover,
body.theme-academic .theory-nav a:hover {
  color: var(--gold2);
  border-color: var(--gold2);
  background: var(--accent-light);
}

body.theme-academic .legend {
  gap: 16px;
  font-size: 11px;
}
body.theme-academic .legend-dot {
  border-radius: 1px;
  width: 10px;
  height: 10px;
}
body.theme-academic .legend-caption {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text3);
}

body.theme-academic .key-btn {
  font-family: var(--font-mono);
  font-size: 11px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--bg2);
  color: var(--text2);
}
body.theme-academic .key-btn:hover {
  border-color: var(--gold2);
  color: var(--gold2);
}
body.theme-academic .key-btn.active {
  background: var(--gold2);
  color: var(--bg);
  border-color: var(--gold2);
}

/* ── Workbook sections ── */
body.theme-academic .key-section {
  padding: 36px 48px 44px;
  border-bottom: 1px solid var(--border);
  background: var(--bg2);
}
body.theme-academic .key-section:nth-child(even) {
  background: var(--bg);
}
body.theme-academic .key-title {
  font-family: var(--font-serif);
  font-size: 28px;
  font-weight: 700;
  color: var(--text);
}
body.theme-academic .key-meta {
  font-size: 11px;
  color: var(--text3);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
body.theme-academic .key-info {
  font-size: 12px;
  background: var(--bg3);
  border-left: 3px solid var(--gold2);
  border-radius: 0;
  color: var(--text2);
  margin-bottom: 20px;
}
body.theme-academic .key-info span { color: var(--gold2); font-weight: 600; }

body.theme-academic .section-label {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text3);
  border-bottom: 1px solid var(--border);
  padding-bottom: 6px;
  margin-bottom: 14px;
}

/* ── Chord cards (Figure panels) ── */
body.theme-academic .chord-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
body.theme-academic .chord-card:hover {
  border-color: var(--border2);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.25);
}
body.theme-academic .chord-card.card-ii { border-left: 3px solid #6060b0; }
body.theme-academic .chord-card.card-v  { border-left: 3px solid #a04030; }
body.theme-academic .chord-card.card-i  { border-left: 3px solid #208060; }

body.theme-academic .chord-card-header {
  background: var(--bg3);
  border-bottom: 1px solid var(--border);
  padding: 10px 14px;
}
body.theme-academic .chord-name {
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
}
body.theme-academic .chord-role,
body.theme-academic .role-dom,
body.theme-academic .role-ii,
body.theme-academic .role-v,
body.theme-academic .role-i {
  border-radius: var(--radius);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
body.theme-academic .role-dom  { color: #a89880; background: rgba(168, 152, 128, 0.15); }
body.theme-academic .role-ii   { color: #9090e0; background: rgba(90, 90, 180, 0.15); }
body.theme-academic .role-v    { color: #e07060; background: rgba(180, 60, 40, 0.15); }
body.theme-academic .role-i    { color: #50c890; background: rgba(30, 140, 90, 0.15); }

body.theme-academic .voicing-box {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
body.theme-academic .voicing-label {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.1em;
  color: var(--text3);
}
body.theme-academic .voicing-label span { color: var(--text2); font-weight: 600; }
body.theme-academic .hand-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--gold2);
  border: 1px solid var(--border);
  background: var(--bg2);
  padding: 1px 4px;
  border-radius: var(--radius);
}
body.theme-academic .voicing-tip {
  font-style: normal;
  font-size: 11px;
  color: var(--text3);
}

/* ── Progression flow steps ── */
body.theme-academic .prog-step-chord {
  font-family: var(--font-serif) !important;
}
body.theme-academic .prog-step-chord.role-ii { color: #9090e0; }
body.theme-academic .prog-step-chord.role-v  { color: #e07060; }
body.theme-academic .prog-step-chord.role-i  { color: #50c890; }
body.theme-academic .prog-step-arrow,
body.theme-academic .prog-arrow { color: var(--text3); }
body.theme-academic .progression-flow {
  background: var(--bg3);
  border: 1px solid var(--border);
  padding: 12px 16px;
  border-radius: var(--radius);
  margin-bottom: 16px;
}

/* ── Progression groups & cards ── */
body.theme-academic .prog-group {
  padding: 36px 48px 0;
  background: var(--bg2);
}
body.theme-academic .prog-group:nth-child(even) { background: var(--bg); }
body.theme-academic .prog-group-title {
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 700;
  color: var(--text);
  border-bottom: 1px solid var(--border);
  padding-bottom: 8px;
  margin-bottom: 10px;
}
body.theme-academic .prog-group-desc {
  font-size: 14px;
  color: var(--text2);
  max-width: 42em;
}

body.theme-academic .prog-subgroup {
  margin-top: 28px;
  padding-top: 20px;
  border-top: 1px dashed var(--border);
}
body.theme-academic .prog-subgroup-title {
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
}
body.theme-academic .prog-subgroup-desc {
  font-size: 13px;
  color: var(--text2);
}

body.theme-academic .prog-card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  background: var(--bg2);
  margin-bottom: 24px;
}
body.theme-academic .prog-card-header {
  background: var(--bg3);
  border-bottom: 1px solid var(--border);
}
body.theme-academic .prog-card-name {
  font-family: var(--font-serif);
  font-size: 18px;
  color: var(--text);
}
body.theme-academic .prog-card-tag {
  border-radius: var(--radius);
  background: var(--bg);
  color: var(--text2);
  border: 1px solid var(--border);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  font-size: 9px;
}
body.theme-academic .theory-note {
  background: var(--bg3);
  border-left: 3px solid var(--gold2);
  padding: 10px 14px;
  font-size: 13px;
  color: var(--text2);
  border-radius: 0;
}

/* ── Form bars ── */
body.theme-academic .form-bar {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
body.theme-academic .form-bar.turnaround { border-color: #605030; background: #1e1a12; }
body.theme-academic .form-bar.highlight  { border-color: #404860; background: #161a22; }
body.theme-academic .bar-chord {
  font-family: var(--font-serif);
  color: var(--text);
}

body.theme-academic .prog-tool-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 4px 6px;
  margin: 4px 0 2px;
  font-size: 10px;
  font-family: var(--font-mono, 'IBM Plex Mono', monospace);
}
body.theme-academic .tool-cross-link {
  color: var(--gold2);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}
body.theme-academic .tool-cross-link:hover {
  border-bottom-color: var(--gold2);
}
body.theme-academic .donate-link {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}

/* ── Black key note labels (interval explorer) ── */
body.theme-academic .note-name-b {
  font-size: 7px;
  bottom: 4px;
  top: auto;
}

/* ── Welcome modal ── */
body.theme-academic.welcome-open { overflow: hidden; }
body.theme-academic .welcome-overlay {
  position: fixed;
  inset: 0;
  z-index: 500;
  background: rgba(8, 7, 6, 0.72);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}
body.theme-academic .welcome-overlay[hidden] { display: none; }
body.theme-academic .welcome-card {
  background: var(--bg2);
  border: 1px solid var(--border2);
  border-radius: var(--radius);
  max-width: 420px;
  width: 100%;
  padding: 24px 22px 20px;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.45);
}
body.theme-academic .welcome-title {
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 700;
  color: var(--text);
  margin: 0 0 10px;
}
body.theme-academic .welcome-lead {
  font-size: 14px;
  color: var(--text2);
  line-height: 1.55;
  margin: 0 0 14px;
}
body.theme-academic .welcome-list {
  margin: 0 0 16px;
  padding-left: 18px;
  font-size: 13px;
  color: var(--text2);
  line-height: 1.6;
}
body.theme-academic .welcome-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 16px;
  align-items: center;
  margin: 0 0 16px;
  font-size: 13px;
}
body.theme-academic .welcome-cta {
  color: var(--gold2);
  font-family: var(--font-mono);
  font-size: 12px;
  text-decoration: none;
  border-bottom: 1px solid var(--gold2);
}
body.theme-academic .welcome-tip {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  color: #1a1208;
  text-decoration: none;
  padding: 8px 14px;
  border-radius: 999px;
  background: linear-gradient(135deg, #f5d078 0%, #e8b84a 100%);
  border: 1px solid #f0d080;
}
body.theme-academic .welcome-tip:hover {
  filter: brightness(1.08);
}
body.theme-academic .welcome-dismiss {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text);
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 10px 18px;
  cursor: pointer;
  min-height: 44px;
}
body.theme-academic .welcome-dismiss:hover {
  border-color: var(--gold2);
  background: var(--accent-light);
}
body.theme-academic .prog-tool-sep {
  color: var(--text3);
}

/* Function labels — muted academic */
body.theme-academic .fn-i,
body.theme-academic .fn-iv,
body.theme-academic .fn-v,
body.theme-academic .fn-ii,
body.theme-academic .fn-vi,
body.theme-academic .fn-iii,
body.theme-academic .fn-sub {
  border-radius: var(--radius);
  font-weight: 600;
}

/* ── Chord flow items ── */
body.theme-academic .flow-chord-name {
  font-family: var(--font-serif);
  font-size: 15px;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text) !important;
}
body.theme-academic .flow-item.fi-ii .flow-chord-name  { border-left: 3px solid #6060b0; }
body.theme-academic .flow-item.fi-v  .flow-chord-name  { border-left: 3px solid #a04030; }
body.theme-academic .flow-item.fi-i  .flow-chord-name  { border-left: 3px solid #208060; }
body.theme-academic .flow-item.fi-vi .flow-chord-name  { border-left: 3px solid #804080; }
body.theme-academic .flow-item.fi-iii .flow-chord-name { border-left: 3px solid #406880; }
body.theme-academic .flow-item.fi-iv  .flow-chord-name  { border-left: 3px solid #806020; }
body.theme-academic .flow-item.fi-sub .flow-chord-name { border-left: 3px solid #705030; }

body.theme-academic .vl-table {
  font-size: 12px;
  border: 1px solid var(--border);
}
body.theme-academic .vl-table th {
  background: var(--bg3);
  color: var(--text3);
  font-family: var(--font-mono);
  text-transform: uppercase;
  font-size: 10px;
  letter-spacing: 0.06em;
}
body.theme-academic .vl-table td {
  border-color: var(--border);
  color: var(--text2);
}

body.theme-academic .compare-box {
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

/* ── Theory tab ── */
body.theme-academic .theory-page {
  padding: 0 48px 80px;
  background: var(--bg2);
  max-width: 52em;
}
body.theme-academic .theory-chapter-title {
  font-family: var(--font-serif);
  font-size: 28px;
  font-weight: 700;
  color: var(--text);
}
body.theme-academic .theory-chapter-sub {
  color: var(--text3);
  letter-spacing: 0.06em;
}
body.theme-academic .theory-chapter-lead {
  font-size: 15px;
  color: var(--text2);
}
body.theme-academic .theory-section-title {
  color: var(--gold2);
  border-bottom-color: var(--border);
}
body.theme-academic .theory-section-num {
  background: var(--bg3);
  color: var(--gold2);
  border: 1px solid var(--border);
}
body.theme-academic .theory-body em {
  color: var(--gold2);
  font-style: italic;
  font-weight: 500;
}
body.theme-academic .theory-callout {
  background: var(--bg3);
  border-left-color: var(--gold2);
  border-radius: 0;
}
body.theme-academic .theory-callout strong { color: var(--text); }
body.theme-academic .theory-rule {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
body.theme-academic .theory-col-box {
  background: var(--bg2);
  border: 1px solid var(--border);
}
body.theme-academic .theory-table th {
  background: var(--bg3);
}
body.theme-academic .theory-table .gold td:first-child { color: var(--gold2); }
body.theme-academic .th-blues { background: #1e100a; color: #c08070; }
body.theme-academic .th-jazz  { background: #141a24; color: var(--gold2); }
body.theme-academic .th-rnb   { background: #0a1e14; color: #50a080; }

/* ── Practice tab ── */
body.theme-academic .practice-page { padding: 0 48px 100px; }
body.theme-academic .practice-section-title {
  font-family: var(--font-serif);
  font-size: 22px;
  color: var(--text);
}
body.theme-academic .metro-bpm-display {
  font-family: var(--font-serif);
  font-size: 56px;
  color: var(--text);
}
body.theme-academic .metro-btn.active {
  background: var(--gold2);
  color: var(--bg);
  border-color: var(--gold2);
}
body.theme-academic .metro-btn:hover {
  border-color: var(--gold2);
  color: var(--gold2);
  background: var(--accent-light);
}

/* ── Tooltip ── */
body.theme-academic .tooltip-inner {
  background: var(--bg2);
  border: 1px solid var(--border);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.35);
  border-radius: var(--radius);
}
body.theme-academic .tt-desc { color: var(--text2); }
body.theme-academic .tt-interval {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text3);
}

/* ── Voicing picker ── */
body.theme-academic #voicing-picker {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}
body.theme-academic .vp-label {
  font-family: var(--font-mono);
  font-size: 9px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text3);
}
body.theme-academic .vp-btn {
  font-family: var(--font-mono);
  font-size: 10px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  color: var(--text2);
}
body.theme-academic .vp-btn.active {
  background: var(--gold2);
  color: var(--bg);
  border-color: var(--gold2);
}
body.theme-academic .vp-btn:hover {
  border-color: var(--gold2);
  color: var(--gold2);
}

/* ── Play buttons ── */
body.theme-academic .play-btn,
body.theme-academic .play-prog-btn {
  font-family: var(--font-mono);
  font-size: 11px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--bg2);
  color: var(--text2);
}
body.theme-academic .play-btn:hover,
body.theme-academic .play-prog-btn:hover {
  border-color: var(--gold2);
  color: var(--gold2);
}
body.theme-academic .play-prog-btn.is-playing,
body.theme-academic .play-btn.is-playing {
  background: var(--gold2);
  color: var(--bg);
  border-color: var(--gold2);
}

/* ── Piano keys — only unlit keys; lit-* colors come from styles.css ── */
body.theme-academic .key-w:not([class*="lit-"]) {
  background: #f0ece4;
  border-color: #888;
}
body.theme-academic .key-b:not([class*="lit-"]) {
  background: #1a1814;
  border-color: #000;
}

/* Progression inline hand boxes */
body.theme-academic .prog-hand-box {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 4px 7px;
}
body.theme-academic .legend-caption {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text3);
}
body.theme-academic .prog-key-picker {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}
body.theme-academic .prog-key-label {
  font-size: 11px;
  color: var(--text3);
  font-family: var(--font-mono);
}

/* ── Responsive padding alignment ── */
@media (max-width: 768px) {
  body.theme-academic .site-header { padding: 20px 20px 16px; }
  body.theme-academic .tab-bar,
  body.theme-academic .key-nav,
  body.theme-academic .legend,
  body.theme-academic .prog-top-nav { padding-left: 16px; padding-right: 16px; }
  body.theme-academic .key-section,
  body.theme-academic .prog-group { padding-left: 20px; padding-right: 20px; }
  body.theme-academic .theory-page { padding-left: 20px; padding-right: 20px; }
}

@media (max-width: 600px) {
  body.theme-academic .site-header h1 { font-size: 22px; }
  body.theme-academic .tip-promo-fab {
    right: 10px;
    bottom: 64px;
    padding: 10px 14px 10px 11px;
  }
  body.theme-academic .site-footer {
    flex-direction: column;
    align-items: flex-start;
  }
  body.theme-academic .site-footer-actions {
    width: 100%;
  }
}

body.theme-academic .vn {
  border-radius: var(--radius);
  border: 1px solid transparent;
}
body.theme-academic .vn-5th {
  background: var(--bg3);
  color: var(--text3);
  border-color: var(--border);
}

body.theme-academic .prog-step-role {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text3);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

body.theme-academic .prog-page {
  background: var(--bg);
  padding-bottom: 80px;
}

body.theme-academic .tab-bar {
  position: sticky;
  top: 0;
  z-index: 200;
}

body.theme-academic .key-nav,
body.theme-academic .prog-top-nav {
  position: sticky;
  top: 41px;
  z-index: 150;
}

body.theme-academic .detect-card,
body.theme-academic .detect-panel {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
body.theme-academic .detect-chord-name {
  font-family: var(--font-serif);
  color: var(--text);
}
body.theme-academic .detect-source-badge {
  font-family: var(--font-mono);
  background: var(--bg3);
  border: 1px solid var(--border);
  color: var(--text2);
}

body.theme-academic .chord-flow-container .flow-arrow {
  color: var(--text3) !important;
  font-size: 18px !important;
}

/* ── Site footer / donations ── */
body.theme-academic .site-footer {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 20px 48px 28px;
  border-top: 1px solid var(--border);
  background: var(--bg2);
  font-size: 12px;
  color: var(--text3);
}
body.theme-academic .site-footer-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}
body.theme-academic .footer-suggestions {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text2);
  text-decoration: none;
  border: 1px solid var(--border);
  padding: 8px 14px;
  border-radius: var(--radius);
}
body.theme-academic .footer-suggestions:hover {
  color: var(--gold2);
  border-color: var(--gold2);
}
body.theme-academic .donate-link {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--gold2);
  text-decoration: none;
  border: 1px solid var(--border);
  padding: 5px 12px;
  border-radius: var(--radius);
}
body.theme-academic .donate-link:hover {
  border-color: var(--gold2);
  background: var(--accent-light);
}
body.theme-academic .donate-link--bright {
  font-size: 13px;
  font-weight: 700;
  color: #1a1208;
  background: linear-gradient(135deg, #f5d078 0%, #e8b84a 45%, #d4a03a 100%);
  border: 1px solid #f0d080;
  padding: 10px 18px;
  border-radius: 999px;
  box-shadow: 0 0 0 1px rgba(240, 208, 128, 0.35), 0 4px 20px rgba(232, 184, 74, 0.45);
  transition: transform 0.15s ease, box-shadow 0.15s ease, filter 0.15s ease;
}
body.theme-academic .donate-link--bright:hover {
  filter: brightness(1.08);
  transform: translateY(-1px);
  box-shadow: 0 0 0 1px rgba(255, 220, 140, 0.5), 0 6px 28px rgba(232, 184, 74, 0.55);
  background: linear-gradient(135deg, #ffe8a8 0%, #f0c860 50%, #e0b040 100%);
}

/* ── Tip promo FAB + modal ── */
body.theme-academic.tip-promo-open { overflow: hidden; }
body.theme-academic .tip-promo-fab {
  position: fixed;
  right: 20px;
  bottom: 76px;
  z-index: 510;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px 10px 12px;
  border: 1px solid #f0d080;
  border-radius: 999px;
  background: linear-gradient(135deg, #f5d078 0%, #e8b84a 100%);
  color: #1a1208;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  cursor: pointer;
  box-shadow: 0 4px 24px rgba(232, 184, 74, 0.5);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
body.theme-academic .tip-promo-fab:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 32px rgba(232, 184, 74, 0.6);
}
body.theme-academic .tip-promo-overlay {
  position: fixed;
  inset: 0;
  z-index: 450;
  background: rgba(8, 7, 6, 0.78);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}
body.theme-academic .tip-promo-overlay[hidden] { display: none; }
body.theme-academic .tip-promo-card {
  position: relative;
  background: var(--bg2);
  border: 1px solid var(--border2);
  border-radius: var(--radius);
  max-width: 380px;
  width: 100%;
  padding: 28px 24px 22px;
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.5);
  text-align: center;
}
body.theme-academic .tip-promo-close {
  position: absolute;
  top: 10px;
  right: 12px;
  background: none;
  border: none;
  color: var(--text3);
  font-size: 22px;
  line-height: 1;
  cursor: pointer;
  padding: 4px 8px;
}
body.theme-academic .tip-promo-close:hover { color: var(--text); }
body.theme-academic .tip-promo-eyebrow {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--gold2);
}
body.theme-academic .tip-promo-title {
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 700;
  color: var(--text);
  margin: 0 0 10px;
}
body.theme-academic .tip-promo-lead {
  font-size: 14px;
  color: var(--text2);
  line-height: 1.55;
  margin: 0 0 20px;
}
body.theme-academic .tip-promo-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 12px 28px;
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  color: #1a1208;
  text-decoration: none;
  background: linear-gradient(135deg, #ffe8a8 0%, #f0c860 45%, #e0b040 100%);
  border: 1px solid #f5d888;
  box-shadow: 0 4px 24px rgba(232, 184, 74, 0.55);
  transition: transform 0.15s ease, filter 0.15s ease;
}
body.theme-academic .tip-promo-cta:hover {
  filter: brightness(1.06);
  transform: translateY(-1px);
}
body.theme-academic .tip-promo-dismiss {
  display: block;
  margin: 14px auto 0;
  background: none;
  border: none;
  color: var(--text3);
  font-family: var(--font-mono);
  font-size: 11px;
  cursor: pointer;
  text-decoration: underline;
  text-underline-offset: 3px;
}
body.theme-academic .tip-promo-dismiss:hover { color: var(--text2); }
body.theme-academic .tip-promo-suggest {
  margin: 16px 0 0;
  font-size: 12px;
}
body.theme-academic .tip-promo-suggest a {
  color: var(--text2);
  font-family: var(--font-mono);
  text-decoration: underline;
  text-underline-offset: 3px;
}
body.theme-academic .tip-promo-suggest a:hover { color: var(--gold2); }

/* ── Harmony Tools tab ── */
body.theme-academic .tools-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding: 10px 48px;
  background: var(--bg3);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 41px;
  z-index: 140;
}
body.theme-academic .tools-nav a {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg2);
  padding: 4px 10px;
  text-decoration: none;
}
body.theme-academic .tools-nav a:hover {
  color: var(--gold2);
  border-color: var(--gold2);
}
body.theme-academic .tools-page {
  padding: 0 48px 80px;
}
body.theme-academic .tools-section {
  padding: 36px 0 28px;
  border-bottom: 1px solid var(--border);
}
body.theme-academic .tools-section:last-child {
  border-bottom: none;
}
body.theme-academic .tools-section-title {
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 6px;
}
body.theme-academic .tools-section-desc {
  font-size: 14px;
  color: var(--text2);
  max-width: 42em;
  margin-bottom: 8px;
}
body.theme-academic .tools-section-teach {
  font-size: 13px;
  color: var(--text3);
  max-width: 42em;
  margin-bottom: 16px;
  line-height: 1.55;
}
body.theme-academic .tool-card-more {
  font-size: 12px;
  color: var(--text2);
  margin-bottom: 8px;
}
body.theme-academic .tool-card-more summary {
  cursor: pointer;
  color: var(--gold2);
  font-family: var(--font-mono);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 4px;
}
body.theme-academic .tool-card-when {
  margin-top: 6px;
  color: var(--text3);
}
body.theme-academic .school-lesson {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 8px;
  background: var(--bg2);
}
body.theme-academic .school-lesson-title {
  font-family: var(--font-serif);
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  padding: 12px 14px;
  cursor: pointer;
  list-style: none;
}
body.theme-academic .school-lesson-title::-webkit-details-marker { display: none; }
body.theme-academic .school-lesson-num {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--gold2);
  margin-right: 8px;
}
body.theme-academic .school-lesson-body {
  padding: 0 14px 14px;
  border-top: 1px solid var(--border);
}
body.theme-academic .school-try {
  margin-top: 12px;
  font-size: 12px;
}
body.theme-academic .th-tag.th-school {
  color: var(--gold2);
  border-color: var(--border2);
}
body.theme-academic .th-tag.th-gospel {
  color: #c8a060;
  border-color: #605030;
}
body.theme-academic .theory-chapter-school {
  border-bottom: 2px solid var(--border2);
  padding-bottom: 24px;
  margin-bottom: 8px;
}
body.theme-academic .tools-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 20px;
}
body.theme-academic .tools-control {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text3);
  display: flex;
  flex-direction: column;
  gap: 4px;
}
body.theme-academic .tools-control select {
  font-family: var(--font-mono);
  font-size: 12px;
  background: var(--bg2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 6px 10px;
  min-width: 140px;
}
body.theme-academic .tool-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 16px;
}
body.theme-academic .tool-card,
body.theme-academic .tool-source-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 14px;
}
body.theme-academic .tool-source-card {
  margin-bottom: 20px;
  border-left: 3px solid var(--gold2);
}
body.theme-academic .tool-card-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 8px;
  margin-bottom: 6px;
}
body.theme-academic .tool-card-chord {
  font-family: var(--font-serif);
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
}
body.theme-academic .tool-card-tag {
  font-family: var(--font-mono);
  font-size: 9px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text3);
  border: 1px solid var(--border);
  padding: 2px 6px;
  border-radius: var(--radius);
}
body.theme-academic .tool-card-desc {
  font-size: 12px;
  color: var(--text2);
  margin-bottom: 10px;
  line-height: 1.5;
}
body.theme-academic .tool-panel-name {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text3);
  margin-bottom: 8px;
}
body.theme-academic .tool-hand-label,
body.theme-academic .tool-hand-label {
  font-size: 9px;
  color: var(--text3);
  font-family: var(--font-mono);
  margin-bottom: 3px;
}
body.theme-academic .tool-hands {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-top: 8px;
}
body.theme-academic .tool-empty {
  font-size: 12px;
  color: var(--text3);
  font-family: var(--font-mono);
}
body.theme-academic .tool-interval-result {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  max-width: 360px;
}
body.theme-academic .tool-interval-label {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text2);
  margin-bottom: 12px;
}

@media (max-width: 768px) {
  body.theme-academic .site-footer { padding: 16px 20px 24px; }
  body.theme-academic .tools-nav,
  body.theme-academic .tools-page { padding-left: 20px; padding-right: 20px; }
}