:root {
  --gc-primary: #d97706;
  --gc-primary-hover: #b45309;
  --gc-bg-card: #ffffff;
  --gc-border: #e2e8f0;
  --gc-text-main: #0f172a;
  --gc-text-muted: #64748b;
  --gc-pill-bg: #f1f5f9;
  --gc-pill-hover: #e2e8f0;
  --gc-result-bg: #f8fafc;
  --gc-fret-bg: #3e2723;
  --gc-fret-wire: #cbd5e1;
  --gc-root-dot: #dc2626;
  --gc-note-dot: #d97706;
}

.gc-tool-container {
  max-width: 880px;
  margin: 0 auto 3rem auto;
  font-family: inherit;
  color: var(--gc-text-main);
}

.gc-editor-card {
  background: var(--gc-bg-card);
  border: 1px solid var(--gc-border);
  border-radius: 12px;
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}

.gc-presets-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
  margin-bottom: 1.25rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--gc-border);
}

.gc-presets-label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--gc-text-muted);
}

.gc-pill-btn {
  background: var(--gc-pill-bg);
  border: 1px solid var(--gc-border);
  color: var(--gc-text-main);
  border-radius: 9999px;
  padding: 0.25rem 0.65rem;
  font-size: 0.75rem;
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease;
}

.gc-pill-btn:hover {
  background: var(--gc-pill-hover);
  border-color: var(--gc-primary);
}

.gc-grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-bottom: 1rem;
}

@media (max-width: 700px) {
  .gc-grid-3 {
    grid-template-columns: 1fr;
  }
}

.gc-field label {
  display: block;
  font-size: 0.85rem;
  font-weight: 700;
  margin-bottom: 0.35rem;
  color: var(--gc-text-main);
}

.gc-req {
  color: #dc2626;
}

.gc-field select {
  width: 100%;
  padding: 0.65rem 0.75rem;
  border: 1px solid var(--gc-border);
  border-radius: 8px;
  background: var(--gc-bg-card);
  color: var(--gc-text-main);
  font-size: 0.95rem;
  box-sizing: border-box;
}

.gc-field select:focus {
  outline: none;
  border-color: var(--gc-primary);
  box-shadow: 0 0 0 3px rgba(217, 119, 6, 0.15);
}

.gc-action-row {
  display: flex;
  gap: 0.75rem;
  margin-top: 1.25rem;
}

.gc-primary-btn {
  flex: 2;
  background: var(--gc-primary);
  color: #ffffff;
  border: none;
  border-radius: 8px;
  padding: 0.85rem 1.5rem;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  transition: background 0.15s ease;
}

.gc-primary-btn:hover {
  background: var(--gc-primary-hover);
}

.gc-secondary-btn {
  background: var(--gc-pill-bg);
  color: var(--gc-text-main);
  border: 1px solid var(--gc-border);
  border-radius: 8px;
  padding: 0.85rem 1.25rem;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
}

.gc-results-card {
  background: var(--gc-result-bg);
  border: 1px solid var(--gc-border);
  border-radius: 12px;
  padding: 1.75rem;
}

.gc-chord-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.25rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--gc-border);
}

@media (max-width: 600px) {
  .gc-chord-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }
}

.gc-chord-title {
  font-size: 1.5rem;
  font-weight: 800;
  margin: 0 0 0.2rem 0;
  color: var(--gc-text-main);
}

.gc-notes-sub {
  font-size: 0.85rem;
  color: var(--gc-text-muted);
}

.gc-tab-string {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 1rem;
  font-weight: 700;
  background: var(--gc-pill-bg);
  padding: 0.35rem 0.75rem;
  border-radius: 6px;
  border: 1px solid var(--gc-border);
  color: var(--gc-primary);
}

.gc-fretboard-wrap {
  background: var(--gc-bg-card);
  border: 1px solid var(--gc-border);
  border-radius: 10px;
  padding: 1rem;
  margin-bottom: 1.5rem;
}

.gc-fretboard-scroll {
  overflow-x: auto;
}

.gc-fretboard-svg {
  display: block;
  width: 100%;
  min-width: 640px;
  height: auto;
}

.gc-theory-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-bottom: 1.5rem;
}

@media (max-width: 640px) {
  .gc-theory-grid {
    grid-template-columns: 1fr;
  }
}

.gc-theory-card {
  background: var(--gc-bg-card);
  border: 1px solid var(--gc-border);
  border-radius: 8px;
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.gc-theory-label {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--gc-text-muted);
  text-transform: uppercase;
}

.gc-theory-val {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--gc-text-main);
}

.gc-tip-box {
  background: var(--gc-bg-card);
  border: 1px solid var(--gc-border);
  border-radius: 8px;
  padding: 1.25rem;
}

.gc-tip-title {
  font-size: 0.9rem;
  font-weight: 700;
  margin: 0 0 0.25rem 0;
  color: var(--gc-primary);
}

.gc-tip-box p {
  margin: 0;
  font-size: 0.85rem;
  color: var(--gc-text-muted);
  line-height: 1.5;
}

.gc-title-wrap {
  display: block;
}

.gc-ad {
  overflow: hidden;
  min-height: 280px;
  margin: 32px 0;
  text-align: center;
}
/* tf:dark-palette — generated by migrate_chrome.py */
/* Neutrals inherit the shared chrome tokens so all tools share one
   ground; brand hues are kept and lightened, never inverted. */
[data-theme="dark"] {
  --gc-primary: #dab181;
  --gc-primary-hover: #d9a57d;
  --gc-bg-card: var(--tf-surface);
  --gc-border: var(--tf-surface);
  --gc-text-main: var(--tf-ink);
  --gc-text-muted: var(--tf-ink-faint);
  --gc-pill-bg: var(--tf-surface);
  --gc-pill-hover: var(--tf-surface);
  --gc-result-bg: var(--tf-surface);
  --gc-fret-bg: var(--tf-ink);
  --gc-fret-wire: #98abc3;
  --gc-root-dot: #da8181;
  --gc-note-dot: #dab181;
}