:root {
  --bg: #0f1115;
  --panel: #171a21;
  --panel-2: #1e222b;
  --border: #2a2f3a;
  --text: #e8eaf0;
  --text-dim: #9aa1b2;
  --accent: #ffb020;
  --accent-2: #4fd1c5;
  --danger: #ef5350;
  --radius: 10px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
}

.app {
  max-width: 960px;
  margin: 0 auto;
  padding: 24px 20px 60px;
  padding-left: max(20px, env(safe-area-inset-left));
  padding-right: max(20px, env(safe-area-inset-right));
  padding-bottom: max(60px, env(safe-area-inset-bottom));
}

header h1 {
  margin: 0 0 4px;
  font-size: 1.8rem;
}

.subtitle {
  color: var(--text-dim);
  margin: 0 0 24px;
}

.dropzone {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 40px 20px;
  text-align: center;
  color: var(--text-dim);
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
}

.dropzone:hover, .dropzone.dragover {
  border-color: var(--accent);
  background: rgba(255, 176, 32, 0.06);
}

.status {
  text-align: center;
  color: var(--text-dim);
  margin: 16px 0;
}

.status.error {
  color: var(--danger);
}

.progress-wrap {
  height: 6px;
  background: var(--panel-2);
  border-radius: 3px;
  margin: 12px 0;
  overflow: hidden;
}

.progress-bar {
  height: 100%;
  width: 0%;
  background: var(--accent);
  transition: width 0.1s linear;
}

.workspace {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-top: 16px;
}

.workspace[hidden] {
  display: none;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 20px;
}

.panel h2, .panel h3 {
  margin: 0 0 12px;
  font-size: 1.05rem;
}

.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.score-playback-row {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 14px;
}

.score-playback-hint {
  color: var(--text-dim);
  font-size: 0.8rem;
}

.stats {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

.stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  min-width: 80px;
}

.stat-value {
  font-size: 1.6rem;
  font-weight: 600;
  color: var(--accent);
}

.stat-label {
  font-size: 0.75rem;
  color: var(--text-dim);
  margin-top: 2px;
  text-align: center;
}

.editable-stat input[type="number"] {
  width: 80px;
  text-align: center;
  font-size: 1.2rem;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  padding: 4px;
}

.btn {
  background: var(--panel-2);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 8px 14px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.9rem;
  touch-action: manipulation;
  min-height: 40px;
}

.btn:hover {
  border-color: var(--accent);
}

.btn-primary {
  background: var(--accent);
  color: #201a08;
  border-color: var(--accent);
  font-weight: 600;
}

.btn-primary:hover {
  filter: brightness(1.08);
}

.btn:disabled,
.mode-btn:disabled,
select:disabled,
input:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  filter: none;
}

.no-file-hint {
  color: var(--text-dim);
  font-size: 0.8rem;
  margin: -4px 0 12px;
}

.transport-controls {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
  flex-wrap: wrap;
}

.time-display {
  color: var(--text-dim);
  font-variant-numeric: tabular-nums;
  margin-left: auto;
}

.seek-bar {
  width: 100%;
  accent-color: var(--accent);
  margin-bottom: 18px;
}

.loop-controls h3 {
  color: var(--text-dim);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.loop-row {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 10px;
}

.loop-label {
  color: var(--text-dim);
  font-variant-numeric: tabular-nums;
  min-width: 70px;
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--text);
}

.loop-row select {
  background: var(--panel-2);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 5px 8px;
  border-radius: 6px;
  margin-left: 6px;
}

.current-note-label {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--accent-2);
  min-width: 60px;
  text-align: right;
}

.panel-header {
  flex-wrap: wrap;
  gap: 10px;
}

.mode-toggle {
  display: flex;
  gap: 6px;
  background: var(--panel-2);
  border-radius: 8px;
  padding: 4px;
}

.mode-btn {
  background: transparent;
  border: none;
  color: var(--text-dim);
  padding: 8px 12px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.85rem;
  touch-action: manipulation;
  min-height: 40px;
}

.mode-btn.active {
  background: var(--accent);
  color: #201a08;
  font-weight: 600;
}

.improvisation-controls,
.manual-controls {
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 14px 16px;
  margin-bottom: 14px;
}

.improvisation-controls .subtitle,
.manual-controls .subtitle {
  margin: 0 0 12px;
}

.improv-row {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.key-display {
  color: var(--text);
}

.improv-row select {
  background: var(--panel);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 5px 8px;
  border-radius: 6px;
  margin-left: 6px;
}

.degree-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}

.degree-chips[hidden] {
  display: none;
}

.degree-chip {
  background: var(--panel-2);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 8px 10px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 0.85rem;
  touch-action: manipulation;
  min-height: 40px;
  display: flex;
  flex-direction: column;
  align-items: center;
  min-width: 46px;
}

.degree-chip .chip-fingering {
  font-size: 0.72rem;
  color: var(--text-dim);
  margin-top: 2px;
}

.degree-chip:hover {
  border-color: var(--accent-2);
}

.degree-chip.active {
  background: var(--accent-2);
  color: #06231f;
  border-color: var(--accent-2);
}

.degree-chip.active .chip-fingering {
  color: #06231f;
}

.favorites-row {
  align-items: flex-start;
  flex-wrap: wrap;
}

.favorite-scales-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  flex: 1;
}

.favorite-chip {
  background: var(--panel);
  border: 1px solid var(--accent);
  color: var(--text);
  padding: 6px 12px;
  border-radius: 999px;
  cursor: pointer;
  font-size: 0.82rem;
  touch-action: manipulation;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.favorite-chip:hover {
  background: var(--panel-2);
}

.favorite-chip .remove-favorite {
  color: var(--text-dim);
  font-weight: 700;
}

.favorite-scales-empty {
  color: var(--text-dim);
  font-size: 0.82rem;
}

#toggleFavoriteScaleBtn.active {
  background: var(--accent);
  color: #201a08;
  border-color: var(--accent);
  font-weight: 600;
}

.staff {
  width: 100%;
  overflow-x: auto;
  background: #f5f2ea;
  border-radius: 6px;
  padding: 8px 0;
  -webkit-tap-highlight-color: transparent;
}

.staff svg {
  display: block;
}

.staff svg rect,
.staff svg text {
  outline: none;
  -webkit-tap-highlight-color: transparent;
  -webkit-user-select: none;
  user-select: none;
}

.pistons {
  display: flex;
  justify-content: center;
  gap: 40px;
  padding: 20px 0 10px;
}

.valve-group {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.valve {
  width: 46px;
  height: 110px;
  background: linear-gradient(#3a3f4b, #23262e);
  border: 2px solid #4a4f5c;
  border-radius: 8px;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding-top: 8px;
  position: relative;
}

.valve-cap {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 30%, #ffe9b8, var(--accent) 65%, #a5680a);
  box-shadow: 0 4px 6px rgba(0,0,0,0.4);
  transition: transform 0.09s ease-out;
}

/* Each valve gets its own signature color, matched everywhere else a
   fingering number is shown (staff, chips) - so "1" always means "the red
   one", etc. */
#valve1 .valve-cap {
  background: radial-gradient(circle at 35% 30%, #ffd9d7, var(--danger) 65%, #8a2f2c);
}

#valve2 .valve-cap {
  background: radial-gradient(circle at 35% 30%, #d7fbf7, var(--accent-2) 65%, #1f6e66);
}

#valve3 .valve-cap {
  background: radial-gradient(circle at 35% 30%, #ffe9b8, var(--accent) 65%, #a5680a);
}

.valve.pressed .valve-cap {
  transform: translateY(58px);
}

.valve-number {
  color: var(--text-dim);
  font-weight: 600;
}

.valve-group:nth-child(1) .valve-number {
  color: var(--danger);
}

.valve-group:nth-child(2) .valve-number {
  color: var(--accent-2);
}

.valve-group:nth-child(3) .valve-number {
  color: var(--accent);
}

.btn.active {
  background: var(--accent-2);
  color: #06231f;
  border-color: var(--accent-2);
  font-weight: 600;
}

.saved-scores-panel .panel-header {
  justify-content: space-between;
}

.saved-scores-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.saved-score-item {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 14px;
}

.saved-score-info {
  flex: 1;
  min-width: 0;
}

.saved-score-name {
  font-weight: 600;
  color: var(--text);
}

.saved-score-meta {
  font-size: 0.78rem;
  color: var(--text-dim);
}

.saved-score-empty {
  color: var(--text-dim);
  font-size: 0.85rem;
}

/* ---------------------------------------------------------------------- */
/* Mobile                                                                  */
/* ---------------------------------------------------------------------- */

@media (max-width: 600px) {
  .app {
    padding: 16px 14px 40px;
    padding-left: max(14px, env(safe-area-inset-left));
    padding-right: max(14px, env(safe-area-inset-right));
  }

  header h1 {
    font-size: 1.4rem;
  }

  .subtitle {
    font-size: 0.85rem;
    margin-bottom: 16px;
  }

  .panel {
    padding: 14px 14px;
  }

  .stats {
    gap: 14px;
  }

  .stat-value {
    font-size: 1.3rem;
  }

  .transport-controls {
    gap: 8px;
  }

  .transport-controls .time-display {
    margin-left: 0;
    width: 100%;
    text-align: center;
    order: 10;
  }

  .mode-toggle {
    width: 100%;
    justify-content: space-between;
  }

  .mode-btn {
    flex: 1;
    padding: 8px 6px;
    font-size: 0.78rem;
  }

  .panel-header {
    gap: 12px;
  }

  .score-playback-row {
    flex-direction: column;
    align-items: stretch;
  }

  .score-playback-row .btn,
  .score-playback-row .checkbox-label {
    width: 100%;
    justify-content: center;
  }

  .pistons {
    gap: 24px;
  }

  .valve {
    width: 42px;
    height: 96px;
  }

  .valve-cap {
    width: 28px;
    height: 28px;
  }

  .valve.pressed .valve-cap {
    transform: translateY(50px);
  }

  .saved-score-item {
    flex-wrap: wrap;
  }

  .saved-score-info {
    flex-basis: 100%;
  }
}

/* ---------------------------------------------------------------------- */
/* Standalone PWA - a dedicated, front-and-center scale library            */
/* ---------------------------------------------------------------------- */

body.standalone-app .app {
  max-width: 720px;
}

body.standalone-app header h1 {
  font-size: 2.1rem;
}

body.standalone-app .subtitle {
  font-size: 1rem;
}

body.standalone-app .notation-panel {
  padding: 22px 20px;
}

body.standalone-app .current-note-label {
  font-size: 2.1rem;
}

body.standalone-app .improvisation-controls label {
  font-size: 1rem;
}

body.standalone-app .degree-chip {
  font-size: 1.05rem;
  padding: 12px 16px;
  min-height: 48px;
}

body.standalone-app .chip-fingering {
  font-size: 0.9rem;
}

body.standalone-app .pistons {
  gap: 56px;
  padding: 28px 0 14px;
}

body.standalone-app .valve {
  width: 62px;
  height: 148px;
}

body.standalone-app .valve-cap {
  width: 44px;
  height: 44px;
}

body.standalone-app .valve.pressed .valve-cap {
  transform: translateY(78px);
}

body.standalone-app .valve-number {
  font-size: 1.15rem;
}