:root {
  color-scheme: dark;
  --bg: #20242a;
  --surface: #2b3038;
  --surface-raised: #343a43;
  --surface-sunken: #171b20;
  --line: #454c56;
  --line-strong: #59616d;
  --text: #e9edf2;
  --muted: #aeb6c0;
  --faint: #79838f;
  --teal: #1fb7b0;
  --amber: #e4bd3a;
  --coral: #ed7d87;
  --green: #76c76c;
  --red: #ff4b55;
  --blue: #4a90e2;
  --selection: #1fb7b0;
  --track-pad: 48px;
  --ruler-height: 28px;
  --audio-height: 104px;
  --lyrics-height: 82px;
  --radius: 6px;
  --px-per-second: 92;
}

* {
  box-sizing: border-box;
  scrollbar-width: thin;
  scrollbar-color: #646d79 #252b32;
}

::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

::-webkit-scrollbar-track {
  background: #252b32;
}

::-webkit-scrollbar-thumb {
  background: #646d79;
}

::-webkit-scrollbar-thumb:hover {
  background: #79838f;
}

[hidden] {
  display: none !important;
}

html,
body {
  width: 100%;
  height: 100%;
  scrollbar-gutter: stable;
}

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

button,
textarea,
input {
  font: inherit;
}

button {
  color: inherit;
}

.editor-shell {
  display: grid;
  grid-template-rows: minmax(0, 1fr) auto;
  grid-template-columns: minmax(0, 1fr);
  width: 100vw;
  height: 100vh;
  background:
    radial-gradient(ellipse at bottom left, rgba(29, 34, 40, 0.4) 0%, transparent 40%),
    radial-gradient(ellipse at top right, rgba(43, 50, 58, 0.3) 0%, transparent 40%);
}

.help-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0, 0, 0, 0.75);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2000;
  backdrop-filter: blur(2px);
}

.help-popup {
  background: var(--surface);
  border: 1px solid var(--line-strong);
  border-radius: 12px;
  padding: 24px 28px;
  width: 480px;
  max-height: 85vh;
  overflow-y: auto;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.8);
}

.help-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
  border-bottom: 1px solid var(--line);
  padding-bottom: 12px;
}

.help-header h2 {
  margin: 0;
  font-size: 20px;
  color: var(--text);
}

.close-button {
  color: var(--muted);
}

.close-button:hover {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text);
}

.close-button svg {
  width: 20px;
  height: 20px;
  stroke: currentColor;
  stroke-width: 2.5;
}

.keybind-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.keybind-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 14px;
}

.keybind-key {
  background: var(--surface-raised);
  padding: 4px 10px;
  border-radius: 6px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  color: var(--amber);
  border: 1px solid var(--line);
  box-shadow: 0 2px 0 rgba(0,0,0,0.2);
}

.keybind-desc {
  color: var(--muted);
}

.top-split {
  display: grid;
  grid-template-columns: minmax(360px, 1fr) minmax(320px, 1fr);
  min-height: 0;
  border-bottom: 1px solid var(--line-strong);
}

.panel {
  display: grid;
  grid-template-rows: 42px minmax(0, 1fr);
  min-width: 0;
  min-height: 0;
  background: var(--surface);
}

.source-panel {
  border-right: 1px solid var(--line-strong);
}

.panel-toolbar,
.transport-strip {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
  padding: 6px 8px;
  background: #303640;
  border-bottom: 1px solid var(--line);
}

.preview-toolbar {
  justify-content: space-between;
}

.panel-title {
  color: var(--muted);
  font-size: 13px;
  font-weight: 650;
}

.button-group {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  min-width: 0;
}

.icon-button,
.transport-button,
.track-button {
  display: inline-grid;
  place-items: center;
  border: 1px solid #4a525e;
  border-radius: var(--radius);
  background: #444c57;
  color: var(--text);
  cursor: pointer;
  transition:
    background-color 120ms ease,
    border-color 120ms ease,
    transform 80ms ease;
}

.icon-button {
  width: 30px;
  height: 30px;
}

.transport-button {
  width: 34px;
  height: 32px;
}

.icon-button:hover,
.transport-button:hover,
.track-button:hover {
  background: #535d69;
  border-color: #687381;
}

.icon-button:active,
.transport-button:active,
.track-button:active {
  transform: translateY(1px);
}

.icon-button:disabled,
.transport-button:disabled {
  cursor: default;
  opacity: 0.45;
}

svg {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.transport-button svg {
  width: 20px;
  height: 20px;
}

#playIcon {
  fill: currentColor;
  stroke: none;
}

#pauseIcon {
  fill: currentColor;
  stroke: none;
}

.file-pill,
.timeline-status {
  min-width: 0;
  overflow: hidden;
  color: var(--muted);
  font-size: 12px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.file-pill {
  margin-left: auto;
  padding: 3px 8px;
  border: 1px solid #4b535f;
  border-radius: 999px;
  background: #252a31;
}

.editor-container {
  position: relative;
  width: 100%;
  height: 100%;
  min-width: 0;
  min-height: 0;
  background: var(--surface-sunken);
  border: 2px solid transparent;
  box-sizing: border-box;
}

.editor-container:focus-within {
  border-color: rgba(31, 183, 176, 0.72);
}

.editor-container.invalid {
  border-color: var(--red);
}

.source-editor,
.source-highlight {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  margin: 0;
  padding: 12px 14px 28px;
  border: none;
  outline: none;
  background: transparent;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 13px;
  line-height: 1.56;
  tab-size: 2;
  white-space: pre-wrap;
  word-wrap: break-word;
  box-sizing: border-box;
}

.source-editor {
  z-index: 2;
  color: transparent;
  -webkit-text-fill-color: transparent;
  caret-color: var(--amber);
  resize: none;
  overflow: auto;
}

.source-highlight {
  z-index: 1;
  color: #eff3f7;
  overflow: hidden;
  pointer-events: none;
}

.hl-line {
  white-space: pre-wrap;
  word-wrap: break-word;
  box-sizing: border-box;
  min-height: 1.56em;
}

.hl-line.selected {
  background-color: rgba(31, 183, 176, 0.14);
  border-left: 3px solid var(--teal);
  padding-left: 11px;
  margin-left: -14px;
  margin-right: -14px;
  padding-right: 14px;
}

.hl-bracket {
  color: var(--faint);
}

.hl-timestamp {
  color: var(--green);
  font-weight: 600;
}

.hl-timestamp-word {
  color: var(--teal);
  font-weight: 600;
}

.hl-metadata-key {
  color: var(--coral);
}

.hl-metadata-colon {
  color: var(--faint);
}

.hl-metadata-value {
  color: var(--muted);
}

.hl-lyric {
  color: var(--text);
}

.hl-invalid {
  color: var(--red);
  text-decoration: underline wavy var(--red);
}


.toast {
  position: absolute;
  left: 12px;
  bottom: 10px;
  max-width: min(560px, calc(50vw - 28px));
  padding: 7px 10px;
  border: 1px solid rgba(255, 75, 85, 0.85);
  border-radius: var(--radius);
  background: rgba(65, 21, 27, 0.8);
  color: #ffd7da;
  font-size: 12px;
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.24);
  z-index: 10;
  pointer-events: none;
}

.source-panel {
  position: relative;
}

.resume-button {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 0 10px;
  border: 1px solid rgba(31, 183, 176, 0.7);
  border-radius: var(--radius);
  background: rgba(31, 183, 176, 0.14);
  color: #d5fffb;
  cursor: pointer;
  font-size: 12px;
  font-weight: 650;
}

.lyrics-preview {
  position: relative;
  flex: 1;
  min-height: 0;
  padding: 16px 20px;
  overflow-y: auto;
  scroll-behavior: smooth;
  background: #1d2228;
}

.lyric-row {
  display: grid;
  grid-template-columns: 78px minmax(0, 1fr);
  align-items: center;
  width: 100%;
  min-height: 34px;
  padding: 5px 16px 5px 12px;
  border: 0;
  border-left: 3px solid transparent;
  background: transparent;
  color: var(--text);
  cursor: pointer;
  text-align: left;
}

.lyric-row:hover {
  background: rgba(255, 255, 255, 0.045);
}

.lyric-row.active {
  border-left-color: var(--amber);
  background: rgba(228, 189, 58, 0.13);
}

.lyric-row.empty .lyric-text {
  color: var(--faint);
  font-style: italic;
}

.lyric-time {
  color: var(--faint);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 12px;
}

.lyric-text {
  min-width: 0;
  overflow: hidden;
  color: #eef2f4;
  font-size: 14px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.timeline-panel {
  display: grid;
  grid-template-rows: 44px auto;
  min-height: 0;
  min-width: 0;
  background: #242930;
  user-select: none;
}

.transport-strip {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 6px 12px;
  border-bottom: 1px solid var(--line);
  background: var(--surface);
  min-width: 0;
}

.timecode {
  display: inline-flex;
  align-items: center;
  height: 30px;
  min-width: 112px;
  padding: 0 10px;
  border: 1px solid #15191f;
  border-radius: 4px;
  background: #0f1318;
  color: #f4f7fb;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 18px;
  font-weight: 760;
}

.timeline-body {
  display: grid;
  grid-template-columns: var(--track-pad) minmax(0, 1fr);
  min-height: 0;
  min-width: 0;
  border-bottom: 1px solid var(--line-strong);
}

.track-pads {
  display: grid;
  grid-template-rows: var(--ruler-height) var(--audio-height) var(--lyrics-height);
  background: #2d333c;
  border-right: 1px solid var(--line-strong);
}

.track-pad {
  width: 100%;
  min-height: 0;
  border: 0;
  border-bottom: 1px solid var(--line);
  border-radius: 0;
  background: #303741;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 4px;
}

.track-pad.stacked {
  flex-direction: column;
  gap: 4px;
}

.track-button {
  color: var(--muted);
}

.track-button:hover {
  color: var(--text);
}

.ruler-pad {
  background: #262c33;
}

.timeline-viewport {
  position: relative;
  min-width: 0;
  min-height: 0;
  overflow: hidden;
  background: #1c2127;
  outline: none;
}

.timeline-viewport:focus-visible {
  box-shadow: inset 0 0 0 2px rgba(31, 183, 176, 0.62);
}

.timeline-content {
  position: relative;
  width: 100%;
  min-width: 100%;
  height: calc(var(--ruler-height) + var(--audio-height) + var(--lyrics-height));
  background:
    linear-gradient(to bottom, transparent var(--ruler-height), rgba(255, 255, 255, 0.05) var(--ruler-height), transparent calc(var(--ruler-height) + 1px)),
    #1c2127;
}

.ruler {
  position: relative;
  height: var(--ruler-height);
  border-bottom: 1px solid var(--line);
  background: #232930;
}

.ruler-tick {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 1px;
  background: rgba(255, 255, 255, 0.24);
}

.ruler-tick.minor {
  top: 16px;
  background: rgba(255, 255, 255, 0.16);
}

.ruler-label {
  position: absolute;
  top: 5px;
  transform: translateX(4px);
  color: var(--muted);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 12px;
  pointer-events: none;
}

.track-lane {
  position: relative;
  height: var(--audio-height);
  border-bottom: 1px solid #3c444e;
}

.lyrics-lane {
  height: var(--lyrics-height);
  background: rgba(255, 255, 255, 0.015);
}

.waveform-canvas {
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
}

.import-audio-button {
  position: absolute;
  top: 10px;
  bottom: 10px;
  display: grid;
  place-items: center;
  border: 1px dashed #6d7785;
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.045);
  color: #dfe6ed;
  cursor: pointer;
  font-size: 17px;
  font-weight: 720;
  z-index: 10;
}

.import-audio-button:hover {
  border-color: var(--teal);
  background: rgba(31, 183, 176, 0.09);
}

@keyframes pulse {
  0% { opacity: 0.6; }
  50% { opacity: 1; }
  100% { opacity: 0.6; }
}

.audio-loading-text {
  position: absolute;
  top: 10px;
  bottom: 10px;
  display: grid;
  place-items: center;
  border: 1px dashed rgba(255, 255, 255, 0.15);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.045);
  color: var(--teal);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.5px;
  z-index: 10;
  animation: pulse 1.5s infinite ease-in-out;
}

.custom-scrollbar-track {
  flex: 1;
  height: 12px;
  background: #1c2127;
  position: relative;
  cursor: pointer;
  margin: 0 4px;
}

.custom-scrollbar-handle {
  position: absolute;
  top: 0;
  bottom: 0;
  background: #646d79;
  min-width: 20px;
}

.custom-scrollbar-playhead-marker {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 2px;
  background: #ff4a4a;
  z-index: 2;
  pointer-events: none;
}

.lyric-chunk {
  position: absolute;
  top: 13px;
  height: 54px;
  min-width: 4px;
  overflow: hidden;
  padding: 7px 8px 0;
  border: 1px solid rgba(119, 62, 66, 0.78);
  border-radius: var(--radius);
  background: var(--coral);
  color: #fff7f7;
  cursor: pointer;
  font-size: 11px;
  font-weight: 720;
  line-height: 1.2;
  text-overflow: ellipsis;
  white-space: nowrap;
  box-shadow: inset 0 -18px 0 rgba(0, 0, 0, 0.08);
  text-align: left;
}

.lyric-chunk.color-0 {
  background: var(--coral);
  border-color: rgba(119, 62, 66, 0.78);
}

.lyric-chunk.color-1 {
  background: #df8d4d;
  border-color: rgba(116, 70, 31, 0.78);
}

.lyric-chunk.color-2 {
  background: #62b85f;
  border-color: rgba(46, 93, 44, 0.8);
}

.lyric-chunk.color-3 {
  background: var(--blue);
  border-color: rgba(36, 75, 122, 0.8);
}

.lyric-chunk.color-4 {
  background: #df62a6;
  border-color: rgba(116, 50, 87, 0.8);
}

.lyric-chunk.color-5 {
  background: #8994a5;
  border-color: rgba(69, 74, 83, 0.8);
}

.lyric-chunk.selected {
  outline: 2px solid var(--selection);
  outline-offset: -3px;
  z-index: 5;
}

.lyric-chunk.empty-gap {
  background: var(--surface-low);
  border: 1px dashed var(--line-strong);
  color: transparent;
  box-shadow: none;
}

.lyric-chunk.empty-gap.selected {
  background: rgba(31, 183, 176, 0.2);
}

.lyric-chunk.ghost-chunk {
  background: rgba(255, 255, 255, 0.04);
  border: 1.5px dashed rgba(255, 255, 255, 0.3);
  color: rgba(255, 255, 255, 0.65);
  box-shadow: none;
  display: flex;
  justify-content: center;
  align-items: center;
  padding-top: 0;
  font-size: 16px;
  font-weight: 700;
  pointer-events: none;
}

.lyric-chunk.drag-create-chunk {
  background: rgba(31, 183, 176, 0.25);
  border: 1.5px dashed var(--selection);
  color: rgba(255, 255, 255, 0.9);
  box-shadow: none;
  display: flex;
  justify-content: center;
  align-items: center;
  padding-top: 0;
  font-style: italic;
  pointer-events: none;
}

.edge-handle {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 8px;
  cursor: ew-resize;
  z-index: 10;
}

.edge-handle.left {
  left: 0;
  cursor: w-resize;
}

.edge-handle.right {
  right: 0;
  cursor: e-resize;
}

.boundary-handle {
  position: absolute;
  top: 13px;
  height: 54px;
  width: 8px;
  cursor: col-resize;
  z-index: 15;
  background: transparent;
}

.boundary-handle:hover {
  background: rgba(255, 255, 255, 0.2);
}

.selection-rect {
  position: absolute;
  border: 1px solid var(--selection);
  background: rgba(31, 183, 176, 0.2);
  pointer-events: none;
  z-index: 20;
}

.lyric-chunk.current {
  box-shadow:
    inset 0 -18px 0 rgba(0, 0, 0, 0.08),
    0 0 0 2px rgba(228, 189, 58, 0.78);
}

.playhead {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 0;
  pointer-events: none;
  z-index: 20;
}

.playhead::before {
  position: absolute;
  top: 0;
  bottom: 0;
  left: -1px;
  width: 2px;
  background: var(--red);
  content: "";
}

.playhead span {
  position: absolute;
  top: -1px;
  left: -7px;
  width: 14px;
  height: 14px;
  background: var(--red);
  clip-path: polygon(50% 100%, 0 0, 100% 0);
}


.zoom-controls {
  display: flex;
  gap: 4px;
  margin-left: auto;
}

@media (max-width: 820px) {
  .editor-shell {
    grid-template-rows: minmax(360px, 54vh) auto;
  }

  .top-split {
    grid-template-columns: 1fr;
    grid-template-rows: minmax(180px, 1fr) minmax(160px, 0.8fr);
  }

  .source-panel {
    border-right: 0;
    border-bottom: 1px solid var(--line-strong);
  }

  .toast {
    max-width: calc(100vw - 24px);
  }

  :root {
    --track-pad: 58px;
  }

  .timecode {
    min-width: 92px;
    font-size: 14px;
  }

  .timeline-status {
    display: none;
  }
}