src/App.css

.app-shell {
  padding: 24px;
  color: var(--text-primary);
  width: 100%;
  max-width: 100%;
  margin: 0;
  height: 100vh;
  max-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  box-sizing: border-box;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  background: var(--panel-strong);
  border: 1px solid var(--border-subtle);
  border-radius: 16px;
  padding: 20px 24px;
  box-shadow: var(--shadow-panel);
}

.topbar h1 {
  margin: 4px 0 0 0;
  font-size: 26px;
  letter-spacing: -0.5px;
}

.eyebrow {
  margin: 0;
  text-transform: uppercase;
  font-size: 12px;
  letter-spacing: 2px;
  color: var(--text-muted);
}

.muted {
  margin: 6px 0 0 0;
  color: var(--text-muted);
}

.actions {
  display: flex;
  gap: 10px;
  align-items: center;
}

.transpose-group {
  display: flex;
  align-items: center;
}

.transpose-select {
  padding: 10px 10px;
  border-radius: 12px;
  border: 1px solid var(--border-soft);
  background: var(--button-soft-bg);
  color: var(--button-soft-text);
  font-weight: 600;
  font-size: 14px;
  cursor: pointer;
  outline: none;
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6'%3E%3Cpath d='M0 0l5 6 5-6z' fill='%23888'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  padding-right: 26px;
  transition: transform 140ms ease, box-shadow 140ms ease, background 140ms ease;
}

.transpose-select:hover {
  transform: translateY(-1px);
}

.transpose-select:focus {
  border-color: var(--accent);
}

.icon-toggle {
  width: 40px;
  height: 40px;
  border-radius: 999px;
  border: 1px solid var(--border-soft);
  background: var(--button-ghost-bg);
  color: var(--button-ghost-text);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  cursor: pointer;
}

.icon-toggle:hover {
  transform: translateY(-1px);
}

.lang-label {
  font-size: 14px;
  font-weight: 700;
  line-height: 1;
}

.audio-bar {
  margin-top: 14px;
  padding: 12px 16px;
  border-radius: 14px;
  background: var(--panel-strong);
  border: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.audio-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.audio-hint {
  color: var(--text-muted);
  font-size: 12px;
}

.audio-right {
  display: flex;
  align-items: center;
  gap: 20px;
}

.volume-control {
  display: flex;
  align-items: center;
  gap: 8px;
}

.volume-label {
  font-size: 12px;
  color: var(--text-muted);
  min-width: 32px;
}

.volume-slider {
  width: 80px;
  height: 4px;
  cursor: pointer;
  accent-color: var(--accent);
}

.volume-value {
  font-size: 11px;
  color: var(--text-muted);
  min-width: 36px;
  text-align: right;
}

.toggle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-primary);
}

.panel {
  margin-top: 18px;
  background: var(--panel);
  border: 1px solid var(--border-subtle);
  border-radius: 16px;
  padding: 18px;
  box-shadow: var(--shadow-panel);
  display: flex;
  flex-direction: column;
  flex: 1;
  min-height: 0;
  overflow: hidden;
}

.panel-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 360px;
  gap: 16px;
  align-items: stretch;
  flex: 1;
  min-height: 0;
  max-height: 100%;
  overflow: hidden;
}

.panel-main {
  min-width: 0;
  display: flex;
  flex-direction: column;
  min-height: 0;
  max-height: 100%;
  overflow: hidden;
}

.panel-side {
  display: flex;
  flex-direction: column;
  gap: 16px;
  width: 360px;
  max-width: 360px;
  /* Use absolute positioning to enforce height */
  position: relative;
  overflow: hidden;
}

.controls {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 14px;
  align-items: center;
  background: var(--panel-soft);
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid var(--border-soft);
  flex-shrink: 0;
}

.controls label {
  display: block;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.controls input[type='number'] {
  width: 100%;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid var(--border-soft);
  background: var(--input-bg);
  color: var(--text-primary);
}

.timesig {
  display: flex;
  align-items: center;
  gap: 6px;
}

.timesig span {
  font-weight: 700;
  color: var(--text-muted);
}

.transport {
  display: flex;
  gap: 6px;
  align-items: center;
  grid-column: 1 / -1;
}

.transport button {
  padding: 6px 10px !important;
  font-size: 13px !important;
  min-width: 0;
}

.status {
  grid-column: 1 / -1;
  color: var(--text-muted);
  font-size: 13px;
}

.transport-divider {
  width: 1px;
  height: 20px;
  background: var(--border-soft);
  margin: 0 2px;
  flex-shrink: 0;
}

.selection-btn {
  font-size: 12px !important;
  padding: 6px 10px !important;
  white-space: nowrap;
}

.selection-btn.active {
  background: var(--accent) !important;
  color: white !important;
}

.button,
.actions button,
.transport button,
.ghost,
.primary,
.json-btn,
.soft {
  cursor: pointer;
  border-radius: 12px;
  border: 1px solid transparent;
  padding: 10px 14px;
  font-weight: 600;
  transition: transform 140ms ease, box-shadow 140ms ease, background 140ms ease, border 140ms ease;
  color: #0f1528;
}

.ghost {
  background: var(--button-ghost-bg);
  color: var(--button-ghost-text);
  border-color: var(--border-soft);
}

.primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  color: var(--button-primary-text);
  box-shadow: 0 8px 26px rgba(72, 228, 194, 0.2);
}

.json-btn {
  background: linear-gradient(135deg, #f59e0b, #d97706);
  color: #fff;
  box-shadow: 0 8px 26px rgba(245, 158, 11, 0.2);
}

.soft {
  background: var(--button-soft-bg);
  color: var(--button-soft-text);
  border: 1px solid var(--border-soft);
}

.ghost:disabled,
.primary:disabled,
.json-btn:disabled,
.soft:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.ghost:hover,
.primary:hover,
.json-btn:hover,
.soft:hover {
  transform: translateY(-1px);
}

.piano-shell {
  border-radius: 12px;
  background: var(--panel-strong);
  border: 1px solid var(--border-subtle);
  overflow: hidden;
  flex: 1;
  min-height: 0;
  max-height: 100%;
  display: flex;
  flex-direction: column;
}

.ruler {
  position: relative;
  height: 32px;
  background: var(--panel-soft);
  border-bottom: 1px solid var(--border-soft);
  min-width: 100%;
}

.ruler-shell {
  display: flex;
}

.ruler-spacer {
  background: var(--panel-soft);
  border-bottom: 1px solid var(--border-soft);
  height: 32px;
}

.ruler-scroll {
  overflow: hidden;
  flex: 1;
  height: 32px;
  cursor: pointer;
}

.measure-mark {
  position: absolute;
  top: 0;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  font-size: 10px;
  color: var(--text-muted);
  padding-left: 4px;
  border-left: 1px solid var(--border-soft);
}

.measure-mark span {
  margin-top: 2px;
}

.ruler-playhead {
  position: absolute;
  top: 0;
  width: 2px;
  height: 100%;
  background: #ff7043;
  pointer-events: none;
  z-index: 10;
}

.ruler-scroll.selecting {
  cursor: crosshair;
}

.selection-range {
  position: absolute;
  top: 0;
  height: 100%;
  background: rgba(66, 165, 245, 0.35);
  border-left: 2px solid #42a5f5;
  border-right: 2px solid #42a5f5;
  pointer-events: none;
  z-index: 5;
}

.grid-selection-range {
  position: absolute;
  top: 0;
  background: rgba(66, 165, 245, 0.15);
  border-left: 2px dashed #42a5f5;
  border-right: 2px dashed #42a5f5;
  pointer-events: none;
  z-index: 1;
}

.roll-body {
  display: flex;
  flex: 1;
  min-height: 0;
  overflow: hidden;
}

.pitch-rail {
  background: var(--panel-strong);
  border-right: 1px solid var(--border-subtle);
  color: var(--text-primary);
  font-size: 12px;
  text-align: right;
  overflow: hidden;
  flex-shrink: 0;
  height: 100%;
}

.pitch-cell {
  border-bottom: 1px solid var(--border-soft);
  display: flex;
  align-items: center;
  justify-content: flex-end;
  padding: 0 4px;
  font-variant-numeric: tabular-nums;
  box-sizing: border-box;
}

.pitch-white {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-primary);
}

.pitch-black {
  background: rgba(0, 0, 0, 0.35);
  color: rgba(233, 238, 247, 0.9);
}

.pitch-c {
  background: rgba(100, 150, 255, 0.15);
  font-weight: 600;
}

.pitch-label {
  font-size: 10px;
}

.roll-grid {
  position: relative;
  overflow: auto;
  flex: 1;
  min-height: 0;
  background-color: var(--grid-bg);
}

.grid-content {
  background-color: var(--grid-bg);
}

.grid-svg {
  shape-rendering: crispEdges;
}

.grid-overlay {
  position: relative;
}

.note-chip {
  position: absolute;
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  border-radius: 6px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  box-shadow: 0 10px 22px rgba(0, 0, 0, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--note-text);
  font-weight: 700;
  user-select: none;
  box-sizing: border-box;
}

.note-active {
  outline: 2px solid #ff7043;
  z-index: 2;
}

.note-overlap {
  background: linear-gradient(135deg, #ef5350 0%, #ff7043 100%) !important;
  animation: pulse-overlap 1s ease-in-out infinite;
}

/* Selected overlapping note - more visible outline */
.note-overlap.note-active {
  outline: 3px solid #1e40af;
  outline-offset: 1px;
  box-shadow: 0 0 12px rgba(30, 64, 175, 0.8);
  animation: none;
}

@keyframes pulse-overlap {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.7; }
}

.playhead {
  position: absolute;
  top: 0;
  width: 2px;
  background: #ff7043;
  box-shadow: 0 0 12px rgba(255, 112, 67, 0.6);
  pointer-events: none;
  z-index: 20;
}

.pitch-rail-inner {
  will-change: transform;
}

.note-label {
  width: 100%;
  text-align: center;
  font-size: 12px;
  padding: 0 12px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.note-handle {
  position: absolute;
  top: 0;
  width: 8px;
  height: 100%;
  background: rgba(255, 255, 255, 0.25);
  cursor: ew-resize;
}

.note-handle.start {
  left: 0;
  border-radius: 6px 0 0 6px;
}

.note-handle.end {
  right: 0;
  border-radius: 0 6px 6px 0;
}

.lyric-container {
  flex: 1;
  min-height: 0;
  position: relative;
}

.lyric-card {
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 12px;
  background: var(--panel-soft);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  /* Force fixed height with absolute positioning */
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
}

.lyric-bulk {
  display: flex;
  gap: 8px;
  padding: 10px 12px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  align-items: center;
}

.lyric-bulk-input {
  flex: 1;
  padding: 8px 10px;
  border-radius: 10px;
  border: 1px solid var(--border-soft);
  background: var(--input-bg);
  color: var(--text-primary);
  resize: vertical;
}

.lyric-header,
.lyric-row {
  display: grid;
  grid-template-columns: 1.4fr 0.5fr 0.5fr 0.5fr;
  gap: 8px;
  padding: 10px 12px;
  align-items: center;
}

.lyric-header {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-muted);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.lyric-list {
  overflow-y: auto;
  overflow-x: hidden;
  flex: 1;
  min-height: 0;
}

.lyric-row {
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.lyric-row:hover {
  background: rgba(255, 255, 255, 0.03);
}

.lyric-row-active {
  background: rgba(72, 228, 194, 0.08);
  border-left: 3px solid #48e4c2;
}

.lyric-input {
  width: 100%;
  padding: 8px 10px;
  border-radius: 10px;
  border: 1px solid var(--border-soft);
  background: var(--input-bg);
  color: var(--text-primary);
}

.lyric-meta {
  color: var(--text-muted);
  font-variant-numeric: tabular-nums;
}

.editable-cell {
  position: relative;
  display: flex;
  align-items: center;
  gap: 2px;
}

.lyric-meta-input {
  width: 100%;
  padding: 2px 4px;
  border: 1px solid transparent;
  border-radius: 4px;
  background: transparent;
  color: var(--text-muted);
  font-size: 12px;
  font-variant-numeric: tabular-nums;
  text-align: center;
  outline: none;
  transition: border-color 0.15s, background-color 0.15s;
}

.lyric-meta-input:hover {
  background: var(--surface-elevated);
}

.lyric-meta-input:focus {
  border-color: var(--accent);
  background: var(--surface-elevated);
  color: var(--text-primary);
}

.lyric-meta-dirty {
  border-color: #f59e0b !important;
  background: rgba(245, 158, 11, 0.1) !important;
}

.confirm-btn {
  flex-shrink: 0;
  width: 18px;
  height: 18px;
  padding: 0;
  border: none;
  border-radius: 4px;
  background: #22c55e;
  color: white;
  font-size: 12px;
  font-weight: bold;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.15s;
}

.confirm-btn:hover {
  background: #16a34a;
}

/* Hide number input spinners */
.lyric-meta-input::-webkit-outer-spin-button,
.lyric-meta-input::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

.lyric-meta-input[type=number] {
  -moz-appearance: textfield;
}

.lyric-empty {
  padding: 16px;
  color: var(--text-muted);
  text-align: center;
}

.audio-track {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 12px;
  align-items: center;
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid var(--border-soft);
  background: var(--panel-soft);
  margin-bottom: 12px;
  flex-shrink: 0;
}

.audio-track-label {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-muted);
}

.audio-wave {
  width: 100%;
  height: 80px;
  min-height: 80px;
}

:root {
  --text-primary: #e9eef7;
  --text-muted: rgba(233, 238, 247, 0.7);
  --panel: rgba(13, 16, 28, 0.8);
  --panel-strong: rgba(16, 21, 35, 0.95);
  --panel-soft: rgba(255, 255, 255, 0.03);
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-soft: rgba(255, 255, 255, 0.12);
  --input-bg: rgba(255, 255, 255, 0.06);
  --grid-bg: rgba(14, 18, 30, 0.9);
  --grid-line-minor: rgba(233, 238, 247, 0.08);
  --grid-line-major: rgba(233, 238, 247, 0.16);
  --accent: #48e4c2;
  --accent-strong: #4b64bc;
  --note-text: #0b1122;
  --button-ghost-bg: rgba(233, 238, 247, 0.18);
  --button-ghost-text: #ffffff;
  --button-soft-bg: rgba(255, 255, 255, 0.14);
  --button-soft-text: #ffffff;
  --button-primary-text: #0b1122;
  --shadow-panel: 0 18px 40px rgba(0, 0, 0, 0.32);
}

:root[data-theme='light'] {
  --text-primary: #1b2238;
  --text-muted: rgba(27, 34, 56, 0.7);
  --panel: rgba(255, 255, 255, 0.9);
  --panel-strong: rgba(250, 252, 255, 0.98);
  --panel-soft: rgba(15, 23, 42, 0.04);
  --border-subtle: rgba(15, 23, 42, 0.12);
  --border-soft: rgba(15, 23, 42, 0.16);
  --input-bg: rgba(15, 23, 42, 0.06);
  --grid-bg: rgba(248, 250, 255, 0.95);
  --grid-line-minor: rgba(15, 23, 42, 0.12);
  --grid-line-major: rgba(15, 23, 42, 0.24);
  --accent: #3f8cff;
  --accent-strong: #4b64bc;
  --note-text: #ffffff;
  --button-ghost-bg: rgba(15, 23, 42, 0.06);
  --button-ghost-text: #1b2238;
  --button-soft-bg: rgba(15, 23, 42, 0.06);
  --button-soft-text: #1b2238;
  --button-primary-text: #0b1122;
  --shadow-panel: 0 18px 40px rgba(15, 23, 42, 0.15);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}