/* =============================================================
   iWhiteboard – style.css
   Clean, modern whiteboard animation UI
   ============================================================= */

/* ── Google Font ──────────────────────────────────────────── */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

/* ── CSS Custom Properties (design tokens) ────────────────── */
:root {
  /* Palette */
  --clr-bg: #0f0f1a;
  --clr-surface: #1a1a2e;
  --clr-panel: #16213e;
  --clr-border: #2a2a4a;
  --clr-accent: #7c3aed;
  --clr-accent2: #a855f7;
  --clr-play: #059669;
  --clr-export: #0284c7;
  --clr-danger: #dc2626;
  --clr-text: #e2e8f0;
  --clr-muted: #94a3b8;
  --clr-selected: rgba(124, 58, 237, 0.25);

  /* Sizing */
  --toolbar-h: 56px;
  --panel-w: 200px;
  --props-w: 220px;
  --timeline-h: 56px;
  --radius: 10px;
  --radius-sm: 6px;

  /* Fonts */
  --font: 'Inter', system-ui, sans-serif;
  --font-size-sm: 0.78rem;
  --font-size-md: 0.875rem;
  --font-size-lg: 1rem;

  /* Motion */
  --transition: 150ms ease;
}

/* ── Reset ────────────────────────────────────────────────── */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html,
body {
  height: 100%;
  font-family: var(--font);
  background: var(--clr-bg);
  color: var(--clr-text);
  overflow: hidden;
  /* prevent page scroll; workspace handles scrolling */
}

/* ── TOOLBAR ──────────────────────────────────────────────── */
.toolbar {
  display: flex;
  align-items: center;
  gap: 8px;
  height: var(--toolbar-h);
  padding: 0 16px;
  background: var(--clr-surface);
  border-bottom: 1px solid var(--clr-border);
  user-select: none;
  position: relative;
  z-index: 100;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.4);
}

.toolbar__brand {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-right: 12px;
}

.toolbar__logo {
  font-size: 1.4rem;
}

.toolbar__name {
  font-size: 1.1rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--clr-accent), var(--clr-accent2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.02em;
}

.toolbar__actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 1;
}

.toolbar__divider {
  width: 1px;
  height: 28px;
  background: var(--clr-border);
  margin: 0 4px;
}

/* ── BUTTONS ──────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 14px;
  border: none;
  border-radius: var(--radius-sm);
  font-family: var(--font);
  font-size: var(--font-size-md);
  font-weight: 600;
  cursor: pointer;
  transition: filter var(--transition), transform var(--transition), box-shadow var(--transition);
  white-space: nowrap;
  letter-spacing: 0.01em;
}

.btn:hover {
  filter: brightness(1.15);
  transform: translateY(-1px);
}

.btn:active {
  transform: translateY(0);
  filter: brightness(0.95);
}

.btn--primary {
  background: var(--clr-accent);
  color: #fff;
}

.btn--secondary {
  background: transparent;
  color: var(--clr-muted);
  border: 1px solid var(--clr-border);
}

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

.btn--play {
  background: var(--clr-play);
  color: #fff;
}

.btn--export {
  background: var(--clr-export);
  color: #fff;
}

.btn--danger {
  background: var(--clr-danger);
  color: #fff;
}

.btn--sm {
  padding: 5px 10px;
  font-size: var(--font-size-sm);
}

/* Icon-only buttons (undo/redo) */
.btn--icon-only {
  padding: 7px 11px;
  font-size: 1rem;
  min-width: 36px;
  justify-content: center;
}

.btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
  transform: none !important;
  filter: none !important;
}

.btn__icon {
  font-size: 0.9rem;
  font-style: normal;
  font-weight: 700;
}

/* ── WORKSPACE LAYOUT ─────────────────────────────────────── */
.workspace {
  display: flex;
  height: calc(100vh - var(--toolbar-h));
  overflow: hidden;
}

/* ── SCENE PANEL ──────────────────────────────────────────── */
.panel {
  background: var(--clr-panel);
  border-right: 1px solid var(--clr-border);
  display: flex;
  flex-direction: column;
}

.panel--scenes {
  width: var(--panel-w);
  flex-shrink: 0;
}

.panel__title {
  padding: 14px 16px 10px;
  font-size: var(--font-size-sm);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--clr-muted);
  border-bottom: 1px solid var(--clr-border);
}

.scene-list {
  list-style: none;
  padding: 8px 0;
  overflow-y: auto;
  flex: 1;
}

.scene-list__item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 16px;
  cursor: pointer;
  font-size: var(--font-size-md);
  color: var(--clr-muted);
  border-left: 3px solid transparent;
  transition: background var(--transition), color var(--transition), border-color var(--transition);
  gap: 6px;
}

.scene-list__item:hover {
  background: rgba(124, 58, 237, 0.1);
  color: var(--clr-text);
}

.scene-list__item.active {
  background: rgba(124, 58, 237, 0.18);
  color: var(--clr-text);
  border-left-color: var(--clr-accent);
  font-weight: 600;
}

.scene-list__name {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.scene-list__del {
  background: none;
  border: none;
  color: var(--clr-muted);
  cursor: pointer;
  font-size: 0.85rem;
  padding: 2px 4px;
  border-radius: 4px;
  opacity: 0;
  transition: opacity var(--transition), color var(--transition);
}

.scene-list__item:hover .scene-list__del {
  opacity: 1;
}

.scene-list__del:hover {
  color: var(--clr-danger);
}

/* ── CANVAS AREA ──────────────────────────────────────────── */
.canvas-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  background: var(--clr-bg);
  overflow: hidden;
  position: relative;
}

.canvas-wrapper {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  width: 100%;
  overflow: auto;
}

#main-canvas {
  background: #ffffff;
  border-radius: var(--radius);
  box-shadow: 0 8px 40px rgba(0, 0, 0, 0.6), 0 0 0 1px rgba(255, 255, 255, 0.06);
  cursor: default;
  max-width: 100%;
  flex-shrink: 0;
}

/* SVG element interaction */
.wb-element {
  cursor: move;
}

.wb-element.selected .wb-elem-hitbox {
  outline: 2px dashed var(--clr-accent);
  outline-offset: 4px;
}

/* Selection highlight rect drawn via SVG */
.selection-rect {
  fill: none;
  stroke: var(--clr-accent);
  stroke-width: 2;
  stroke-dasharray: 6 4;
  pointer-events: none;
}

/* resize handles */
.resize-handle {
  fill: var(--clr-accent);
  stroke: #fff;
  stroke-width: 1.5;
  cursor: se-resize;
}

/* ── PROPERTIES PANEL ─────────────────────────────────────── */
.props-panel {
  position: absolute;
  right: 12px;
  top: 12px;
  width: var(--props-w);
  max-height: calc(100vh - var(--toolbar-h) - 60px);
  overflow-y: auto;
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius);
  padding: 14px;
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.5);
  display: flex;
  flex-direction: column;
  gap: 8px;
  z-index: 50;
  animation: slideIn 0.2s ease;
  scrollbar-width: thin;
  scrollbar-color: var(--clr-border) transparent;
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateX(12px);
  }

  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.props-panel__title {
  font-size: var(--font-size-sm);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--clr-muted);
  padding-bottom: 8px;
  border-bottom: 1px solid var(--clr-border);
}

.props-panel__label {
  font-size: var(--font-size-sm);
  color: var(--clr-muted);
  margin-bottom: 2px;
}

.props-panel__input {
  width: 100%;
  background: var(--clr-panel);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-sm);
  color: var(--clr-text);
  font-family: var(--font);
  font-size: var(--font-size-md);
  padding: 6px 10px;
  outline: none;
  transition: border-color var(--transition);
}

.props-panel__input:focus {
  border-color: var(--clr-accent);
}

/* Hide text props for image elements */
.props-panel.image-mode #prop-text,
.props-panel.image-mode #prop-size,
.props-panel.image-mode label[for="prop-text"],
.props-panel.image-mode label[for="prop-size"] {
  display: none;
}

/* ── Props panel: animation select ───────────────────────── */
.props-panel__select {
  width: 100%;
  background: var(--clr-panel);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-sm);
  color: var(--clr-text);
  font-family: var(--font);
  font-size: var(--font-size-sm);
  padding: 6px 8px;
  cursor: pointer;
  outline: none;
  transition: border-color var(--transition);
  appearance: auto;
}

.props-panel__select:focus,
.props-panel__select:hover {
  border-color: var(--clr-accent);
}

.props-panel__select option {
  background: var(--clr-surface);
  color: var(--clr-text);
}

/* ── Section divider ─────────────────────────────────────── */
.props-section-divider {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--clr-accent);
  padding: 6px 0 2px;
  border-top: 1px solid var(--clr-border);
  margin-top: 2px;
}

/* ── Animation live preview ───────────────────────────────── */
.props-anim-preview {
  background: var(--clr-panel);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-sm);
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  position: relative;
}

#prop-anim-preview-text {
  font-size: 1rem;
  font-weight: 700;
  color: var(--clr-accent2);
  pointer-events: none;
  display: inline-block;
}

/* ── Timing row: two inputs side by side ─────────────────── */
.props-timing-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.props-timing-row .props-panel__label {
  display: block;
  margin-bottom: 2px;
}

.props-panel__input--half {
  width: 100%;
}


/* ── TIMELINE STRIP ───────────────────────────────────────── */
.timeline-strip {
  width: 100%;
  height: var(--timeline-h);
  background: var(--clr-surface);
  border-top: 1px solid var(--clr-border);
  display: flex;
  align-items: center;
  padding: 0 16px;
  gap: 12px;
  flex-shrink: 0;
}

.timeline-strip__label {
  font-size: var(--font-size-sm);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--clr-muted);
  white-space: nowrap;
}

.timeline-strip__track {
  flex: 1;
  height: 36px;
  background: var(--clr-panel);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  padding: 0 8px;
  gap: 8px;
  overflow-x: auto;
}

/* Individual timeline blocks */
.tl-block {
  height: 24px;
  border-radius: 4px;
  display: flex;
  align-items: center;
  padding: 0 8px;
  font-size: 11px;
  font-weight: 600;
  white-space: nowrap;
  cursor: pointer;
  transition: filter var(--transition);
  min-width: 60px;
}

.tl-block:hover {
  filter: brightness(1.2);
}

.tl-block--text {
  background: rgba(124, 58, 237, 0.5);
  border: 1px solid var(--clr-accent);
}

.tl-block--image {
  background: rgba(2, 132, 199, 0.5);
  border: 1px solid var(--clr-export);
}

/* ── TOAST ────────────────────────────────────────────────── */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(16px);
  background: var(--clr-surface);
  color: var(--clr-text);
  border: 1px solid var(--clr-border);
  border-radius: 999px;
  padding: 10px 22px;
  font-size: var(--font-size-md);
  font-weight: 500;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
  opacity: 0;
  transition: opacity 0.3s ease, transform 0.3s ease;
  pointer-events: none;
  z-index: 9999;
}

.toast.visible {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

.toast.success {
  border-color: var(--clr-play);
  color: #6ee7b7;
}

.toast.error {
  border-color: var(--clr-danger);
  color: #fca5a5;
}

.toast.info {
  border-color: var(--clr-accent);
  color: var(--clr-accent2);
}

/* ── SCROLLBAR STYLING ────────────────────────────────────── */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: var(--clr-border);
  border-radius: 99px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--clr-accent);
}

/* ── PLAYBACK OVERLAY ─────────────────────────────────────── */
.playback-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.35);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
  animation: fadeIn 0.2s ease;
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }

  to {
    opacity: 1;
  }
}

.playback-overlay__text {
  font-size: 1.2rem;
  font-weight: 700;
  color: #fff;
  background: rgba(0, 0, 0, 0.5);
  padding: 14px 28px;
  border-radius: 999px;
}

/* ── MULTI-TRACK TIMELINE ──────────────────────────────────── */
.timeline {
  width: 100%;
  height: 310px;
  display: flex;
  flex-direction: column;
  background: var(--clr-surface);
  border-top: 1px solid var(--clr-border);
  flex-shrink: 0;
  user-select: none;
}

.timeline__toolbar {
  height: 30px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 12px;
  border-bottom: 1px solid var(--clr-border);
  flex-shrink: 0;
}

.timeline__title {
  font-size: var(--font-size-sm);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--clr-muted);
}

.timeline__zoom {
  display: flex;
  align-items: center;
  gap: 5px;
}

.tl-ctrl-btn {
  width: 22px;
  height: 22px;
  border: 1px solid var(--clr-border);
  border-radius: 4px;
  background: none;
  color: var(--clr-muted);
  cursor: pointer;
  font-size: 14px;
  line-height: 1;
  transition: border-color var(--transition), color var(--transition);
}

.tl-ctrl-btn:hover {
  border-color: var(--clr-accent);
  color: var(--clr-text);
}

/* Time counter: "0:05 / 1:00" */
.tl-time-display {
  font-size: 11px;
  font-variant-numeric: tabular-nums;
  color: var(--clr-muted);
  letter-spacing: 0.04em;
  min-width: 80px;
  text-align: center;
  font-family: 'Courier New', monospace;
}

/* Stop button — slightly red tint */
#tl-stop {
  color: #f87171;
  border-color: rgba(248, 113, 113, 0.35);
}

#tl-stop:hover {
  background: rgba(239, 68, 68, 0.15);
  border-color: #f87171;
  color: #fff;
}

/* Speed selector */
.tl-speed-select {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--clr-border);
  border-radius: 4px;
  color: var(--clr-muted);
  font-size: 11px;
  padding: 1px 4px;
  cursor: pointer;
  outline: none;
  height: 22px;
  transition: border-color var(--transition), color var(--transition);
}

.tl-speed-select:hover,
.tl-speed-select:focus {
  border-color: var(--clr-accent);
  color: var(--clr-text);
}

.tl-speed-select option {
  background: #1e1b4b;
}

/* Mute button inside audio label */
.tl-audio-mute:hover {
  border-color: #f43f5e !important;
  color: #f43f5e !important;
}

.tl-zoom-label {
  font-size: var(--font-size-sm);
  color: var(--clr-muted);
  min-width: 26px;
  text-align: center;
}

/* ── Body layout ──── */
.timeline__body {
  flex: 1;
  display: flex;
  overflow: hidden;
}

/* ── Left label column ──── */
.timeline__labels-col {
  width: 130px;
  flex-shrink: 0;
  border-right: 1px solid var(--clr-border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.tl-ruler-spacer {
  height: 26px;
  flex-shrink: 0;
  background: var(--clr-panel);
  border-bottom: 1px solid var(--clr-border);
}

.tl-labels-body {
  flex: 1;
  overflow: hidden;
  /* scrolled programmatically */
}

.tl-label {
  height: 36px;
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 0 10px;
  font-size: 0.73rem;
  color: var(--clr-muted);
  cursor: pointer;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
  transition: background var(--transition), color var(--transition);
  white-space: nowrap;
  overflow: hidden;
}

.tl-label:hover {
  background: rgba(124, 58, 237, 0.1);
  color: var(--clr-text);
}

.tl-label--selected {
  background: rgba(124, 58, 237, 0.18);
  color: var(--clr-accent2) !important;
}

.tl-label__icon {
  font-size: 0.7rem;
  font-weight: 700;
  opacity: 0.75;
  flex-shrink: 0;
}

.tl-label__name {
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ── Right scrollable track area ──── */
.timeline__track-area {
  flex: 1;
  overflow: auto;
}

.timeline__inner {
  position: relative;
  min-height: 100%;
}

/* ── Ruler ──── */
.timeline__ruler {
  height: 26px;
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--clr-panel);
  border-bottom: 1px solid var(--clr-border);
  position: relative;
  /* for absolute tick children */
}

.tl-tick {
  position: absolute;
  bottom: 0;
}

.tl-tick__line {
  width: 1px;
  background: var(--clr-border);
}

.tl-tick--major .tl-tick__line {
  height: 10px;
}

.tl-tick--minor .tl-tick__line {
  height: 5px;
}

.tl-tick__label {
  position: absolute;
  bottom: 12px;
  left: 3px;
  font-size: 9px;
  color: var(--clr-muted);
  white-space: nowrap;
  pointer-events: none;
}

/* ── Track rows ──── */
.tl-row {
  height: 36px;
  position: relative;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

/* ── Blocks ──── */
.tl-block {
  position: absolute;
  top: 5px;
  height: 26px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  padding: 0 26px 0 8px;
  cursor: grab;
  min-width: 30px;
  overflow: hidden;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.35);
  transition: box-shadow 100ms ease;
}

.tl-block:active {
  cursor: grabbing;
}

.tl-block--text {
  background: linear-gradient(120deg, #5b21b6, #7c3aed);
  border: 1px solid #8b5cf6;
}

.tl-block--image {
  background: linear-gradient(120deg, #075985, #0284c7);
  border: 1px solid #38bdf8;
}

.tl-block--selected {
  box-shadow: 0 0 0 2px #a78bfa, 0 2px 16px rgba(124, 58, 237, 0.6);
}

/* Multi-selected block: teal ring, distinct from purple primary selection */
.tl-block--multisel {
  box-shadow: 0 0 0 2px #22d3ee, 0 2px 12px rgba(34, 211, 238, 0.45);
  outline: 1px dashed rgba(34, 211, 238, 0.5);
  outline-offset: 1px;
}

.tl-block--multisel.tl-block--selected {
  /* Both: primary + multi — show both indicators */
  box-shadow: 0 0 0 2px #a78bfa, 0 0 0 4px #22d3ee, 0 2px 16px rgba(124, 58, 237, 0.5);
}

/* Fit All buttons — green accent */
.tl-ctrl-btn--fit {
  color: #86efac;
  border-color: rgba(134, 239, 172, 0.35);
  font-size: 10px;
  letter-spacing: -0.5px;
}

.tl-ctrl-btn--fit:hover {
  background: rgba(34, 197, 94, 0.15);
  border-color: #86efac;
  color: #fff;
}


.tl-block__label {
  font-size: 10px;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.9);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  pointer-events: none;
  flex: 1;
}

/* Resize grip on right edge */
.tl-block__resize {
  position: absolute;
  right: 0;
  top: 0;
  width: 14px;
  height: 100%;
  cursor: ew-resize;
  display: flex;
  align-items: center;
  justify-content: center;
  border-left: 2px solid rgba(255, 255, 255, 0.15);
  flex-shrink: 0;
}

.tl-block__resize::after {
  content: '⋮';
  font-size: 10px;
  color: rgba(255, 255, 255, 0.45);
  pointer-events: none;
}

/* ── Playhead ──── */
.timeline__playhead {
  position: absolute;
  top: 0;
  width: 2px;
  height: 100%;
  background: #f43f5e;
  pointer-events: none;
  z-index: 20;
  display: none;
}

.timeline__playhead::before {
  content: '';
  position: absolute;
  top: 0;
  left: -5px;
  width: 12px;
  height: 12px;
  background: #f43f5e;
  border-radius: 50%;
}

.timeline__playhead.visible {
  display: block;
}

/* ── Empty state ──── */
.tl-empty {
  padding: 24px 16px;
  text-align: center;
  font-size: var(--font-size-sm);
  color: var(--clr-muted);
  pointer-events: none;
}

/* ── RESPONSIVE FALLBACK ──────────────────────────────────── */

@media (max-width: 700px) {
  .panel--scenes {
    display: none;
  }

  .props-panel {
    width: calc(100vw - 24px);
    right: 12px;
  }
}

/* ── EXPORT QUALITY MODAL ─────────────────────────────────── */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.65);
  backdrop-filter: blur(6px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  animation: fadeIn 0.2s ease;
}

.modal-backdrop[hidden] {
  display: none;
}

.modal {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: 16px;
  padding: 28px 32px 24px;
  width: min(860px, 92vw);
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.7);
  animation: modalPop 0.25s cubic-bezier(0.34, 1.4, 0.64, 1);
  display: flex;
  flex-direction: column;
  gap: 16px;
}

@keyframes modalPop {
  from {
    opacity: 0;
    transform: scale(0.92) translateY(12px);
  }

  to {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

.modal__title {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--clr-text);
}

.modal__subtitle {
  font-size: var(--font-size-sm);
  color: var(--clr-muted);
  margin-top: -8px;
}

/* ── Quality grid: 4 cards side by side ───────────────────── */
.quality-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}

/* Individual quality cards */
.quality-card {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 6px;
  padding: 16px 14px;
  background: var(--clr-panel);
  border: 2px solid var(--clr-border);
  border-radius: var(--radius);
  cursor: pointer;
  transition: border-color var(--transition), background var(--transition), transform var(--transition), box-shadow var(--transition);
  text-align: left;
  font-family: var(--font);
  color: var(--clr-text);
  position: relative;
}

.quality-card:hover {
  border-color: var(--clr-accent);
  background: rgba(124, 58, 237, 0.08);
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(124, 58, 237, 0.2);
}

.quality-card:active {
  transform: translateY(0);
}

/* Recommended highlight */
.quality-card--recommended {
  border-color: var(--clr-accent);
  background: rgba(124, 58, 237, 0.07);
}

.quality-card--recommended::after {
  content: 'Best choice';
  position: absolute;
  top: -10px;
  right: 10px;
  background: var(--clr-accent);
  color: #fff;
  font-size: 10px;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 999px;
  letter-spacing: 0.04em;
}

/* Badges */
.quality-card__badge {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 3px 9px;
  border-radius: 999px;
}

.quality-card__badge--preview {
  background: rgba(100, 116, 139, 0.25);
  color: #94a3b8;
}

.quality-card__badge--hd {
  background: rgba(2, 132, 199, 0.2);
  color: #38bdf8;
}

.quality-card__badge--fhd {
  background: rgba(124, 58, 237, 0.25);
  color: #c4b5fd;
}

.quality-card__badge--4k {
  background: rgba(234, 179, 8, 0.2);
  color: #fde047;
}

/* Resolution headline */
.quality-card__res {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--clr-text);
  letter-spacing: -0.01em;
}

/* FPS / bitrate line */
.quality-card__fps {
  font-size: var(--font-size-sm);
  color: var(--clr-muted);
  font-weight: 500;
}

/* Description */
.quality-card__desc {
  font-size: var(--font-size-sm);
  color: var(--clr-muted);
  line-height: 1.5;
  margin-top: 2px;
}

/* Scope toggle (Current Scene / All Scenes) */
.scope-row {
  display: flex;
  align-items: center;
  gap: 10px;
}

.scope-label {
  font-size: var(--font-size-sm);
  color: var(--clr-muted);
  font-weight: 600;
  white-space: nowrap;
}

.scope-toggle {
  display: flex;
  gap: 3px;
  background: var(--clr-panel);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-sm);
  padding: 3px;
}

.scope-btn {
  padding: 5px 16px;
  border: none;
  border-radius: 4px;
  background: transparent;
  color: var(--clr-muted);
  font-family: var(--font);
  font-size: var(--font-size-sm);
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
  white-space: nowrap;
}

.scope-btn.active {
  background: var(--clr-accent);
  color: #fff;
}

.scope-btn:not(.active):hover {
  background: rgba(124, 58, 237, 0.15);
  color: var(--clr-text);
}

/* Cancel button */
.modal__cancel {
  align-self: flex-end;
  margin-top: 4px;
}


/* Stack cards on small screens */
@media (max-width: 700px) {
  .quality-grid {
    grid-template-columns: 1fr 1fr;
  }

  .modal {
    padding: 20px 16px 16px;
  }
}

/* ═══════════════════════════════════════════════════════════
   AUDIO SECTION  (pinned below timeline object tracks)
══════════════════════════════════════════════════════════ */
.timeline__audio-section {
  display: flex;
  flex-shrink: 0;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(0, 0, 0, 0.18);
  height: 100px;
  /* 2 × 44px rows + 2px border */
}

.tl-audio-labels-col {
  width: 130px;
  flex-shrink: 0;
  border-right: 1px solid var(--clr-border);
  overflow: hidden;
}

#tl-audio-labels {
  height: 100%;
  display: flex;
  flex-direction: column;
}

.tl-audio-scroll {
  flex: 1;
  overflow-x: hidden;
  /* scroll is synced from main track area */
  overflow-y: hidden;
  position: relative;
}

.tl-audio-inner {
  position: relative;
  min-height: 100%;
}

#tl-audio-tracks {
  display: flex;
  flex-direction: column;
}

/* Audio label rows */
.tl-audio-label {
  height: 50px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 3px;
  padding: 4px 8px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  cursor: default;
}

.tl-audio-name {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: 10px;
  font-weight: 700;
  color: var(--clr-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.tl-audio-ctrl {
  display: flex;
  align-items: center;
  gap: 4px;
}

.tl-audio-ctrl input[type=range] {
  flex: 1;
  height: 3px;
  cursor: pointer;
}

.tl-audio-dur {
  font-size: 9px;
  color: rgba(255, 255, 255, 0.35);
  white-space: nowrap;
}

.tl-audio-del {
  background: none;
  border: none;
  color: rgba(255, 255, 255, 0.3);
  cursor: pointer;
  font-size: 10px;
  padding: 0 2px;
  line-height: 1;
  transition: color 0.15s;
}

.tl-audio-del:hover {
  color: #f43f5e;
}

/* Action buttons (record/upload) */
.tl-audio-btn {
  font-size: 9px;
  padding: 2px 6px;
  border-radius: 4px;
  cursor: pointer;
  border: 1px solid rgba(255, 255, 255, 0.18);
  background: none;
  color: rgba(255, 255, 255, 0.45);
  transition: all 0.15s;
  white-space: nowrap;
}

.tl-audio-btn:hover {
  border-color: rgba(255, 255, 255, 0.4);
  color: #fff;
}

.tl-audio-btn--rec {
  border-color: #7c3aed;
  color: #a78bfa;
}

.tl-audio-btn--rec:hover,
.tl-audio-btn--rec.active {
  background: rgba(124, 58, 237, 0.2);
  color: #f43f5e;
  border-color: #f43f5e;
}

/* Audio track rows */
.tl-row--audio {
  height: 50px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

/* Audio block (filled with waveform) */
.tl-audio-block {
  position: absolute;
  top: 6px;
  left: 0;
  height: 38px;
  border-radius: 6px;
  border: 1px solid transparent;
  overflow: hidden;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.4);
  display: flex;
  align-items: center;
}

.tl-waveform {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.tl-audio-block-lbl {
  position: absolute;
  left: 7px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 10px;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.85);
  pointer-events: none;
  white-space: nowrap;
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.5);
}

.tl-audio-hint {
  position: absolute;
  top: 50%;
  left: 8px;
  transform: translateY(-50%);
  font-size: 10px;
  color: rgba(255, 255, 255, 0.2);
  pointer-events: none;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: calc(100% - 16px);
}

/* =============================================================
   DRAW MODE
   ============================================================= */

/* ── Draw button ─────────────────────────────────────────────── */
.btn--draw {
  background: transparent;
  color: var(--clr-muted);
  border: 1px solid var(--clr-border);
  transition: all 0.2s;
}

.btn--draw:hover {
  color: var(--clr-text);
  border-color: #a78bfa;
}

.btn--draw.btn--active,
.btn--active {
  background: linear-gradient(135deg, #7c3aed, #a855f7);
  color: #fff;
  border-color: transparent;
  box-shadow: 0 0 12px rgba(124, 58, 237, 0.5);
}

.btn--active:hover {
  opacity: 0.9;
}

/* ── Draw panel strip (below toolbar) ──────────────────────────── */
/* ── Draw panel strip (shown only in draw mode) ─────────────────── */
.draw-panel[hidden] {
  display: none !important;
}

.draw-panel {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 7px 18px;
  background: rgba(124, 58, 237, 0.12);
  border-bottom: 1px solid rgba(124, 58, 237, 0.3);
  backdrop-filter: blur(8px);
  animation: slideDown 0.18s ease-out;
  flex-wrap: wrap;
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.draw-panel__label {
  font-size: 0.72rem;
  font-weight: 600;
  color: #a78bfa;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  white-space: nowrap;
}

/* Color picker */
.draw-panel__color {
  width: 34px;
  height: 28px;
  border: 2px solid rgba(255, 255, 255, 0.15);
  border-radius: 6px;
  background: transparent;
  cursor: pointer;
  padding: 0;
  outline: none;
  transition: border-color 0.2s;
}

.draw-panel__color:hover {
  border-color: #a78bfa;
}

/* Width preset buttons */
.draw-panel__widths {
  display: flex;
  align-items: center;
  gap: 4px;
}

.draw-panel__swatch-wrap {
  display: flex;
  align-items: center;
  gap: 6px;
}

.draw-width-btn {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid transparent;
  border-radius: 6px;
  color: var(--clr-text);
  width: 30px;
  height: 28px;
  cursor: pointer;
  font-size: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s;
}

.draw-width-btn:hover {
  background: rgba(124, 58, 237, 0.25);
  border-color: #a78bfa;
}

.draw-width-btn.active {
  background: linear-gradient(135deg, #7c3aed, #a855f7);
  color: #fff;
  border-color: transparent;
}

/* ── Timeline block color for drawings ──────────────────────────── */
.tl-block--drawing {
  background: linear-gradient(135deg, #5b21b6, #7c3aed) !important;
  border-color: #a78bfa !important;
}

.tl-block--drawing.tl-block--selected {
  box-shadow: 0 0 0 2px #c4b5fd, 0 2px 8px rgba(124, 58, 237, 0.5) !important;
}

/* ── SVG drawing strokes ─────────────────────────────────────────── */
.wb-stroke {
  stroke-linecap: round;
  stroke-linejoin: round;
  vector-effect: non-scaling-stroke;
}

/* ── Props panel draw fields ─────────────────────────────────────── */
.props-draw-fields {
  padding: 8px 12px;
  border-top: 1px solid var(--clr-border);
}

.props-draw-fields .props-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 6px;
}

.props-draw-fields .props-label {
  font-size: 0.72rem;
  color: var(--clr-muted);
  width: 40px;
  flex-shrink: 0;
}

.props-draw-fields .props-color-input {
  width: 36px;
  height: 28px;
  border: 1px solid var(--clr-border);
  border-radius: 6px;
  padding: 0;
  cursor: pointer;
}

.props-draw-fields .props-input {
  width: 60px;
  background: var(--clr-bg);
  border: 1px solid var(--clr-border);
  border-radius: 6px;
  color: var(--clr-text);
  padding: 4px 8px;
  font-size: 0.8rem;
}

.props-section-label {
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 8px;
}

/* =============================================================
   HIDE-AFTER TOGGLE (properties panel)
   ============================================================= */
.props-hide-row {
  padding: 8px 12px 4px;
  border-top: 1px solid var(--clr-border);
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.props-hide-label {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  user-select: none;
}

.props-hide-cb {
  appearance: none;
  -webkit-appearance: none;
  width: 16px;
  height: 16px;
  border: 2px solid var(--clr-border);
  border-radius: 4px;
  background: var(--clr-bg);
  cursor: pointer;
  flex-shrink: 0;
  position: relative;
  transition: all 0.15s;
}

.props-hide-cb:checked {
  background: var(--clr-accent);
  border-color: var(--clr-accent);
}

.props-hide-cb:checked::after {
  content: '';
  position: absolute;
  left: 3px;
  top: 0px;
  width: 5px;
  height: 9px;
  border: 2px solid #fff;
  border-top: none;
  border-left: none;
  transform: rotate(45deg);
}

.props-hide-text {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--clr-text);
}

.props-hide-hint {
  font-size: 0.67rem;
  color: var(--clr-muted);
  padding-left: 24px;
  line-height: 1.3;
}

/* Timeline block: shows dashed right-edge when hideAfter is on */
.tl-block--hide-after {
  border-right: 3px dashed rgba(255, 255, 255, 0.5) !important;
}


/* =============================================================
   BACKGROUND PICKER PANEL
   ============================================================= */

.bg-panel[hidden] {
  display: none !important;
}

.bg-panel {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 6px 16px;
  background: linear-gradient(135deg, #1a1a3e 0%, #12122a 100%);
  border-bottom: 1px solid var(--clr-border);
  flex-wrap: wrap;
  position: relative;
  animation: slideDown 0.18s ease;
}

.bg-panel__label {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--clr-muted);
  text-transform: uppercase;
  white-space: nowrap;
  margin-right: 4px;
}

/* ── Preset swatches ─────────────────────────────────────── */
.bg-panel__presets {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.bg-swatch {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  padding: 4px 6px;
  background: transparent;
  border: 1.5px solid transparent;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.15s;
}

.bg-swatch:hover {
  border-color: var(--clr-accent);
  background: rgba(139, 92, 246, 0.1);
}

.bg-swatch--active {
  border-color: #a78bfa !important;
  background: rgba(139, 92, 246, 0.2) !important;
}

.bg-swatch__preview {
  width: 42px;
  height: 26px;
  border-radius: 4px;
  display: block;
  border: 1px solid rgba(255, 255, 255, 0.15);
}

/* Swatch colors */
.bg-swatch--whiteboard {
  background: #f8f7f4;
}

.bg-swatch--blackboard {
  background: #1e3a28;
}

.bg-swatch--corkboard {
  background: #c49a3c;
}

.bg-swatch--dark {
  background: #0d1117;
  border: 1px solid rgba(99, 102, 241, 0.4) !important;
}

.bg-swatch--grad-blue {
  background: linear-gradient(135deg, #667eea, #764ba2);
}

.bg-swatch--grad-sunset {
  background: linear-gradient(135deg, #f093fb, #f5576c);
}

.bg-swatch--grad-ocean {
  background: linear-gradient(135deg, #43c6ac, #191654);
}

.bg-swatch__name {
  font-size: 0.6rem;
  color: var(--clr-muted);
  white-space: nowrap;
}

/* ── Custom color ─────────────────────────────────────────── */
.bg-panel__custom {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-left: 6px;
  padding-left: 10px;
  border-left: 1px solid var(--clr-border);
}

.bg-panel__custom-label {
  font-size: 0.7rem;
  color: var(--clr-muted);
  white-space: nowrap;
}

.bg-custom-color {
  width: 32px;
  height: 26px;
  border-radius: 4px;
  border: 1.5px solid var(--clr-border);
  padding: 2px;
  cursor: pointer;
  background: transparent;
}

.btn--sm {
  padding: 4px 10px !important;
  font-size: 0.72rem !important;
}

/* ── Close button ─────────────────────────────────────────── */
.bg-panel__close {
  margin-left: auto;
  background: transparent;
  border: none;
  color: var(--clr-muted);
  font-size: 1.2rem;
  cursor: pointer;
  padding: 2px 6px;
  border-radius: 4px;
  line-height: 1;
  transition: color 0.15s;
}

.bg-panel__close:hover {
  color: var(--clr-text);
}


/* ── SETTINGS MODAL ─────────────────────────────────────── */
.settings-group {
  margin-bottom: 24px;
  background: rgba(255, 255, 255, 0.03);
  padding: 16px;
  border-radius: var(--radius);
  border: 1px solid var(--clr-border);
}

.settings-group--danger {
  border-color: rgba(239, 68, 68, 0.3);
  background: rgba(239, 68, 68, 0.05);
}

.settings-group__title {
  font-size: 0.9rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--clr-muted);
  margin-bottom: 12px;
}

.settings-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
}

.settings-label {
  color: var(--clr-text-dim);
  font-size: 0.9rem;
}

.settings-value {
  font-family: monospace;
  color: var(--clr-accent);
  font-weight: 700;
}

.storage-bar {
  width: 100%;
  height: 8px;
  background: var(--clr-bg);
  border-radius: 4px;
  overflow: hidden;
  margin: 8px 0;
}

.storage-bar__fill {
  height: 100%;
  background: var(--clr-accent);
  transition: width 0.5s ease-out, background 0.3s;
}

.settings-hint {
  font-size: 0.75rem;
  color: var(--clr-muted);
  margin-top: 8px;
  line-height: 1.4;
}

.settings-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.settings-group--danger .settings-group__title {
  color: #ef4444;
}

.btn--danger {
  background: #ef4444;
  color: white;
}

.btn--danger:hover {
  background: #dc2626;
  box-shadow: 0 0 15px rgba(239, 68, 68, 0.4);
}

/* ── PRESETS GRID ────────────────────────────────────────── */
.presets-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.preset-card {
  background: var(--clr-bg);
  border: 2px solid var(--clr-border);
  border-radius: 12px;
  padding: 16px 8px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  color: var(--clr-text);
}

.preset-card:hover {
  border-color: var(--clr-accent);
  background: rgba(124, 58, 237, 0.1);
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(0, 0, 15, 0.3);
}

.preset-card__icon {
  font-size: 1.5rem;
}

.preset-card__name {
  font-size: 0.75rem;
  font-weight: 600;
  text-align: center;
}

@media (max-width: 500px) {
  .presets-grid {
    grid-template-columns: 1fr;
  }
}