* { box-sizing: border-box; }
body { margin: 0; min-height: 100svh; font-family: system-ui, sans-serif; line-height: 1.5; color: var(--gold-100); background: var(--neutral-700); }
.chord-app { max-width: 900px; margin: auto; padding: 24px 18px 48px; }
.chord-app [hidden] { display: none !important; }
.chord-app h1 { margin: 0 0 8px; }
.chord-app h2, .chord-app h3 { margin-top: 0; }
.chord-app .panel { padding: clamp(18px, 4vw, 32px); border: 1px solid var(--neutral-300); border-radius: 12px; background: var(--neutral-900); }
.chord-app a { color: var(--gold-300); }
.chord-app label { display: block; margin-bottom: 8px; font-weight: 600; }
.chord-app select, .chord-app button { min-height: 44px; padding: 10px 14px; border: 1px solid var(--mist-400); border-radius: 8px; font: inherit; }
.chord-app select { width: 100%; color: var(--neutral-900); background: var(--mist-050); }
.chord-app button { color: var(--mist-200); background: var(--neutral-700); }
.chord-app :disabled { cursor: not-allowed; opacity: .7; }
.chord-app .placeholders { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 250px), 1fr)); gap: 16px; margin: 24px 0; }
.chord-app .placeholder { border: 1px dashed var(--neutral-300); border-radius: 8px; padding: 18px; }
.chord-app p { overflow-wrap: anywhere; }
.chord-app :focus-visible { outline: 3px solid var(--gold-500); outline-offset: 4px; }
.chord-app .hearing-test { border-top: 1px solid var(--neutral-300); margin-top: 28px; padding-top: 24px; }
.chord-app .test-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 18px; }
.chord-app button:not(:disabled) { cursor: pointer; border-color: var(--gold-300); }
.chord-app .chord-result { padding: 16px; border-radius: 8px; background: var(--neutral-700); }

/* Shared Melopoiia music surfaces, as used by Pattern-Trainer. */
body.music-editor { font-family: "Inter", "Avenir", "Segoe UI", sans-serif; background: radial-gradient(circle at top, #2563eb2e, transparent 60%), var(--neutral-900); }
.chord-app { width: 100%; min-width: 0; }
.chord-app .panel.music-panel { color: var(--neutral-900); border: 1px solid var(--fx-blue-veil); border-radius: 24px; box-shadow: var(--fx-shadow-subtle); }
.chord-app .music-panel--settings { background: var(--blue-600); }
.chord-app .music-panel--workspace { background: var(--green-300); }
.chord-app .music-panel a { color: var(--neutral-900); }
.chord-app button { min-height: 48px; background: var(--blue-100); color: var(--neutral-900); font-weight: 650; touch-action: manipulation; white-space: normal; }
.chord-app button:not(:disabled) { border-color: var(--neutral-500); }
.chord-app .chord-result { background: var(--gold-100); }
.chord-app .test-badge { display: inline-block; margin-top: 0; padding: 6px 12px; border-radius: 12px; background: var(--gold-300); font-weight: 700; }
.chord-app .notes-toggle { display: flex; align-items: center; gap: 10px; min-height: 48px; margin: 12px 0; }
.chord-app .notes-toggle input { width: 24px; height: 24px; flex-shrink: 0; accent-color: var(--neutral-900); }
.chord-app .listen-button { width: 100%; min-height: 76px; font-size: 1.3rem; background: var(--teal-300); border-radius: 16px; }
.chord-app .answer-field { border: 0; padding: 0; margin: 24px 0; min-width: 0; }
.chord-app .answer-field legend { font-weight: 700; margin-bottom: 12px; }
.chord-app .answer-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.chord-app .answer-button { min-height: 72px; width: 100%; padding: 14px; font-size: 1.15rem; background: var(--mist-050); border: 2px solid var(--neutral-500); border-radius: 12px; }
.chord-app .answer-button[aria-pressed="true"] { background: var(--gold-300); border-color: var(--neutral-900); box-shadow: inset 0 0 0 2px var(--neutral-900); }
.chord-app .answer-button:disabled { opacity: 1; cursor: default; }
.chord-app .solution, .chord-app .tone-list { padding: 16px; border-radius: 12px; background: var(--gold-100); }
.chord-app .music-panel :focus-visible { outline: 3px solid var(--neutral-900); outline-offset: 3px; }
@media (max-width: 480px) {
  .chord-app { padding: 18px 10px 32px; }
  .chord-app .panel { padding: 18px 14px; }
  .chord-app .answer-grid { grid-template-columns: minmax(0, 1fr); }
  .chord-app .test-actions > button { width: 100%; }
  .chord-app select { max-width: 100%; }
}