.subtitle-uploader {
  border: 2px dashed var(--border);
  padding: 1.25rem;
  text-align: center;
  transition: border-color .2s, background .2s;
}

.subtitle-uploader.drag-over {
  border-color: var(--primary);
  background: var(--soft);
}

.subtitle-upload-label {
  display: grid;
  gap: .35rem;
  cursor: pointer;
}

.subtitle-upload-label strong {
  color: var(--primary);
  font-size: 1.15rem;
}

.subtitle-upload-label span,
.subtitle-toolbar span,
.subtitle-card-heading span,
.subtitle-canvas-heading p {
  color: var(--muted);
}

.subtitle-toolbar {
  position: sticky;
  z-index: 5;
  top: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin: 1rem 0;
  padding: .75rem 0;
  background: var(--bg);
}

.subtitle-toolbar > div:first-child,
.subtitle-card-heading > div {
  display: grid;
  gap: .2rem;
  min-width: 0;
}

.subtitle-toolbar span,
.subtitle-card-heading span {
  font-size: .82rem;
}

.subtitle-workspace {
  display: grid;
  grid-template-columns: minmax(290px, 28%) minmax(0, 1fr);
  align-items: start;
  gap: 1rem;
  min-height: 76vh;
}

.subtitle-image-list {
  position: sticky;
  top: 150px;
  display: grid;
  gap: .7rem;
  max-height: calc(100vh - 175px);
  overflow: auto;
  padding-right: .25rem;
}

.subtitle-image-card {
  display: grid;
  align-content: start;
  gap: .7rem;
  padding: .75rem;
}

.subtitle-card-heading {
  display: grid;
  grid-template-columns: 4.25rem minmax(0, 1fr);
  align-items: center;
  gap: .75rem;
}

.subtitle-card-heading img {
  width: 4.25rem;
  height: 4.25rem;
  border: 1px solid var(--border);
  border-radius: .55rem;
  background: #fff;
  object-fit: cover;
  object-position: center 78%;
}

.subtitle-card-heading strong,
.subtitle-card-heading span {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.subtitle-band-settings {
  display: grid;
  gap: .55rem;
  padding-top: .55rem;
  border-top: 1px solid var(--border);
}

.subtitle-band-settings[hidden] {
  display: none;
}

.subtitle-band-summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: .5rem;
  color: var(--primary);
  font-size: .78rem;
  font-weight: 700;
}

.subtitle-band-settings label {
  display: grid;
  gap: .2rem;
  color: var(--muted);
  font-size: .72rem;
  font-weight: 700;
}

.subtitle-band-settings label > div {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 4.5rem;
  align-items: center;
  gap: .45rem;
}

.subtitle-band-settings input {
  width: 100%;
  min-width: 0;
}

.subtitle-band-settings input[type="number"] {
  padding: .35rem .4rem;
}

.subtitle-card-actions {
  display: flex;
  justify-content: flex-end;
  gap: .35rem;
}

.subtitle-card-actions .copy-button {
  min-width: 2.5rem;
}

.subtitle-canvas {
  position: sticky;
  top: 150px;
  max-height: calc(100vh - 175px);
  min-width: 0;
  overflow: auto;
  padding: 1rem;
}

.subtitle-canvas-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
}

.subtitle-canvas-heading h3 {
  margin: 0;
  font-size: 1.05rem;
}

.subtitle-canvas-heading p {
  margin: .3rem 0 0;
  font-size: .85rem;
}

.subtitle-canvas-heading > strong {
  color: var(--primary);
  white-space: nowrap;
}

.subtitle-sequence {
  width: min(100%, 820px);
  margin: 0 auto 1rem;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: .75rem;
  background: #fff;
  box-shadow: 0 12px 30px rgba(15, 23, 42, .08);
}

.subtitle-sequence-item {
  position: relative;
  background: #fff;
}

.subtitle-sequence-item:not(:first-child) {
  border-top: 3px solid var(--primary);
}

.subtitle-sequence-frame {
  position: relative;
  min-height: 1px;
  overflow: hidden;
  background: #fff;
}

.subtitle-sequence-frame img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: auto;
  user-select: none;
  pointer-events: none;
  will-change: transform;
}

.subtitle-strip-marker {
  position: absolute;
  z-index: 2;
  top: .35rem;
  left: .4rem;
  padding: .18rem .4rem;
  border-radius: 999px;
  background: rgba(11, 99, 206, .92);
  color: #fff;
  font-size: .68rem;
  font-weight: 700;
}

.subtitle-preview-output span {
  color: var(--primary);
  font-weight: 700;
}

@media (max-width: 900px) {
  .subtitle-workspace {
    grid-template-columns: 1fr;
    min-height: auto;
  }

  .subtitle-image-list {
    position: static;
    display: flex;
    align-items: flex-start;
    max-height: none;
    overflow-x: auto;
    overflow-y: hidden;
    padding: 0 0 .4rem;
    scroll-snap-type: x proximity;
  }

  .subtitle-image-card {
    min-width: 300px;
    scroll-snap-align: start;
  }

  .subtitle-canvas {
    position: static;
    max-height: 72vh;
  }

  .subtitle-toolbar {
    top: 60px;
  }
}

@media (max-width: 720px) {
  .subtitle-toolbar {
    position: static;
    align-items: stretch;
    flex-direction: column;
  }

  .subtitle-toolbar .tool-actions {
    display: grid;
    grid-template-columns: 1fr 1fr;
  }

  .subtitle-toolbar .tool-actions .button:last-child {
    grid-column: 1 / -1;
  }

  .subtitle-image-card {
    min-width: min(310px, calc(100vw - 2.5rem));
  }

  .subtitle-card-heading {
    grid-template-columns: 3.5rem minmax(0, 1fr);
  }

  .subtitle-card-heading img {
    width: 3.5rem;
    height: 3.5rem;
  }

  .subtitle-canvas {
    padding: .65rem;
  }

  .subtitle-canvas-heading {
    display: grid;
  }
}