:root {
  --bg: #0e1116;
  --surface: #161b22;
  --surface-2: #1f2630;
  --border: #2a323d;
  --text: #e6edf3;
  --muted: #8b96a5;
  --accent: #4f8cff;
  --accent-fg: #ffffff;
  --danger: #ef4444;
  --radius: 12px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.5;
}

main {
  max-width: 960px;
  margin: 0 auto;
  padding: 32px 20px 80px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

header h1 {
  margin: 0 0 4px;
  font-size: 28px;
  letter-spacing: -0.01em;
}
.sub { margin: 0; color: var(--muted); }

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

.card h2 {
  margin: 0 0 12px;
  font-size: 16px;
  font-weight: 600;
  letter-spacing: 0.01em;
}

.hint { margin: 0 0 12px; color: var(--muted); font-size: 13px; }
.muted { color: var(--muted); font-size: 13px; }
.hidden { display: none !important; }

.row { display: flex; align-items: center; gap: 12px; }
.between { justify-content: space-between; }
.actions { display: flex; gap: 8px; flex-wrap: wrap; }
.actions-row { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; }

/* Dropzone */
.dropzone {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  padding: 40px 20px;
  text-align: center;
  cursor: pointer;
  transition: border-color 120ms ease, background 120ms ease, padding 120ms ease;
}
.dropzone:hover, .dropzone:focus, .dropzone.drag {
  border-color: var(--accent);
  background: var(--surface-2);
  outline: none;
}
.dropzone-inner { display: flex; flex-direction: column; gap: 4px; }
.dropzone strong { font-size: 16px; }
.dropzone span { color: var(--muted); }
.dropzone.compact {
  padding: 14px 20px;
}
.dropzone.compact strong { font-size: 13px; }
.dropzone.compact span { display: none; }

/* Preview */
.preview-card { padding: 14px 16px 16px; }
.preview-stage {
  position: relative;
  width: 100%;
  max-width: 360px;
  margin: 0 auto 10px;
  background: #000;
  border-radius: 10px;
  overflow: hidden;
  border: 1px solid var(--border);
}
#previewCanvas {
  display: block;
  width: 100%;
  height: 100%;
  background: #000;
}
.preview-empty {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--muted);
  font-size: 14px;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(255,255,255,0.02), rgba(0,0,0,0));
}

.transport {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
}
.transport input[type="range"] {
  flex: 1;
  appearance: none;
  background: var(--surface-2);
  height: 6px;
  border-radius: 999px;
  outline: none;
  cursor: pointer;
}
.transport input[type="range"]:disabled { opacity: 0.4; cursor: not-allowed; }
.transport input[type="range"]::-webkit-slider-thumb {
  appearance: none;
  width: 14px; height: 14px;
  border-radius: 50%;
  background: var(--accent);
  border: 0;
  cursor: pointer;
}
.transport input[type="range"]::-moz-range-thumb {
  width: 14px; height: 14px;
  border-radius: 50%;
  background: var(--accent);
  border: 0;
  cursor: pointer;
}
.play-btn {
  width: 32px; height: 32px;
  padding: 0;
  justify-content: center;
  border-radius: 50%;
  font-size: 12px;
}
.mono {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-variant-numeric: tabular-nums;
  font-size: 12px;
  min-width: 56px;
}

/* Image list */
.image-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
  gap: 10px;
}
.image-list li {
  position: relative;
  aspect-ratio: 1 / 1;
  border-radius: 10px;
  overflow: hidden;
  background: #000;
  border: 2px solid var(--border);
  cursor: grab;
  user-select: none;
}
.image-list li.dragging { opacity: 0.4; }
.image-list li.drop-target { border-color: var(--accent); }
.image-list img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  pointer-events: none;
}
.image-list .badge {
  position: absolute;
  top: 6px; left: 6px;
  background: rgba(0,0,0,0.65);
  color: white;
  font-size: 11px;
  padding: 2px 6px;
  border-radius: 6px;
}
.image-list .color-dot {
  position: absolute;
  top: 6px; right: 6px;
  width: 12px; height: 12px;
  border-radius: 50%;
  border: 2px solid rgba(0,0,0,0.4);
}
.image-list .remove {
  position: absolute;
  bottom: 6px; right: 6px;
  background: rgba(0,0,0,0.7);
  border: 0;
  color: white;
  width: 24px; height: 24px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 14px;
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
}
.image-list .remove:hover { background: var(--danger); }

/* Forms */
.grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}
.grid .full { grid-column: 1 / -1; }
label { display: flex; flex-direction: column; gap: 6px; font-size: 13px; color: var(--muted); }
input[type="number"], input[type="file"], select {
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 10px 12px;
  border-radius: 8px;
  font: inherit;
  width: 100%;
}
input[type="number"]:focus, input[type="file"]:focus, select:focus {
  outline: none;
  border-color: var(--accent);
}
select { appearance: none; cursor: pointer; }

label.toggle {
  flex-direction: row;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-size: 14px;
  cursor: pointer;
}
label.toggle input[type="checkbox"] { width: auto; cursor: pointer; }
.filename { margin-top: 4px; }

/* Buttons */
button, .button {
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 9px 14px;
  border-radius: 8px;
  font: inherit;
  font-size: 13px;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
button:hover, .button:hover { border-color: var(--accent); }
button:disabled { opacity: 0.5; cursor: not-allowed; }
.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-fg);
  font-weight: 600;
}
.primary:hover { filter: brightness(1.08); }
.ghost { background: transparent; }

/* Timeline */
.timeline {
  width: 100%;
  height: 24px;
  background: var(--surface-2);
  border-radius: 6px;
  border: 1px solid var(--border);
  overflow: hidden;
  display: flex;
  position: relative;
}
.timeline .seg {
  height: 100%;
  flex-shrink: 0;
  position: relative;
  cursor: pointer;
}
.timeline .seg.boundary { box-shadow: inset 2px 0 0 rgba(255,255,255,0.75); }
.timeline .empty {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--muted);
  font-size: 12px;
  cursor: default;
}

.timeline-text {
  position: relative;
  width: 100%;
  height: 18px;
  margin-top: 4px;
  background: var(--surface-2);
  border-radius: 6px;
  border: 1px solid var(--border);
  overflow: hidden;
}
.timeline-text .bar {
  position: absolute;
  top: 2px;
  bottom: 2px;
  border-radius: 3px;
  min-width: 2px;
  border: 1px solid rgba(0,0,0,0.25);
  font-size: 11px;
  line-height: 12px;
  padding: 0 4px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  cursor: pointer;
}
.timeline-text .bar.overflow {
  background-image: repeating-linear-gradient(
    45deg,
    rgba(239,68,68,0.55),
    rgba(239,68,68,0.55) 4px,
    rgba(239,68,68,0.85) 4px,
    rgba(239,68,68,0.85) 8px
  );
  color: #fff;
}
.timeline-text:empty::before {
  content: "Text overlays will appear here.";
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--muted);
  font-size: 11px;
}

/* Text overlays (merged into preview card) */
.text-overlays {
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid var(--border);
}
.text-overlays h2 { margin: 0; }

.text-defaults {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0;
  margin: 10px 0;
}
.text-defaults summary {
  cursor: pointer;
  padding: 8px 12px;
  font-size: 13px;
  user-select: none;
}
.text-defaults summary::marker { color: var(--muted); }
.text-defaults[open] summary { border-bottom: 1px solid var(--border); }
.defaults-grid {
  display: grid;
  grid-template-columns: auto auto auto 1fr;
  gap: 16px;
  align-items: end;
  padding: 12px;
}
.defaults-grid select {
  padding: 6px 8px;
  min-width: 120px;
}
.defaults-grid label { font-size: 12px; }
.color-field input[type="color"] {
  width: 44px; height: 32px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--surface);
  cursor: pointer;
  padding: 2px;
}
.defaults-grid input[type="number"] { width: 80px; }
.anchor-field {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 12px;
  color: var(--muted);
}
.anchor-grid {
  display: grid;
  grid-template-columns: repeat(3, 20px);
  grid-template-rows: repeat(3, 20px);
  gap: 3px;
  width: max-content;
}
.anchor-grid button {
  width: 20px; height: 20px;
  padding: 0;
  border-radius: 4px;
  background: var(--surface);
  border: 1px solid var(--border);
  cursor: pointer;
}
.anchor-grid button:hover { border-color: var(--accent); }
.anchor-grid button[aria-checked="true"] {
  background: var(--accent);
  border-color: var(--accent);
}

/* Export options disclosure inside Settings */
.export-options {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0;
}
.export-options summary {
  cursor: pointer;
  padding: 8px 12px;
  font-size: 13px;
  user-select: none;
}
.export-options summary::marker { color: var(--muted); }
.export-options[open] summary { border-bottom: 1px solid var(--border); }
.export-grid {
  grid-template-columns: 1fr 1fr;
}
.export-grid .filename { grid-column: 1 / -1; }

.text-list {
  list-style: none;
  margin: 0 0 8px;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.text-row {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-left: 3px solid var(--border);
  border-radius: 8px;
  padding: 10px 12px;
  display: grid;
  grid-template-columns: 1fr auto auto auto auto;
  grid-template-areas: "text in out tools remove";
  align-items: center;
  gap: 8px;
  transition: border-color 120ms ease, background 120ms ease;
}
.text-row.active { border-left-color: var(--accent); background: #1a2330; }
.text-row.has-overrides { border-left-color: #d9a441; }
.text-row .text-input {
  grid-area: text;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 8px 10px;
  border-radius: 6px;
  font: inherit;
  font-size: 13px;
  min-width: 0;
}
.text-row .text-input:focus { outline: none; border-color: var(--accent); }
.time-field {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  color: var(--muted);
}
.time-field .time-label {
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-size: 10px;
}
.time-input {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 4px 6px;
  border-radius: 4px;
  font: inherit;
  font-size: 11px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-variant-numeric: tabular-nums;
  width: 64px;
  text-align: right;
  min-width: 0;
}
.time-input:focus { outline: none; border-color: var(--accent); }
.time-field .now-btn {
  padding: 4px 8px;
  font-size: 11px;
  background: var(--surface);
}
.text-row .tools, .text-row .remove-btn {
  background: transparent;
  border: 0;
  color: var(--muted);
  padding: 4px 6px;
}
.text-row .tools:hover { color: var(--accent); border-color: transparent; }
.text-row .remove-btn:hover { color: var(--danger); border-color: transparent; }
.text-row .overrides {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: auto auto auto auto 1fr auto;
  gap: 12px;
  align-items: end;
  padding-top: 10px;
  margin-top: 4px;
  border-top: 1px dashed var(--border);
}
.text-row .overrides select {
  padding: 6px 8px;
  min-width: 110px;
}
.text-row .overrides label {
  font-size: 11px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.text-row .overrides input[type="number"] { width: 70px; }
.text-row .overrides .reset {
  background: transparent;
  border: 0;
  color: var(--muted);
  font-size: 11px;
  padding: 6px 0;
  text-decoration: underline;
}
.text-row .overrides .reset:hover { color: var(--accent); }

@media (max-width: 720px) {
  .text-row {
    grid-template-columns: 1fr auto auto;
    grid-template-areas:
      "text text remove"
      "in   out  tools";
  }
  .defaults-grid { grid-template-columns: auto auto; }
  .text-row .overrides { grid-template-columns: auto auto; }
}

.status { font-size: 13px; }

footer { margin-top: 20px; text-align: center; }
footer p { margin: 0; }

@media (max-width: 560px) {
  .grid { grid-template-columns: 1fr; }
  main { padding: 20px 14px 60px; }
}