/* Subtitle Converter — design tokens */
.sc-body {
  --sc-bg: #f0f4f8;
  --sc-surface: #fff;
  --sc-border: #e2e8f0;
  --sc-text: #1a1a2e;
  --sc-muted: #64748b;
  --sc-primary: #7c3aed;
  --sc-primary-hover: #6d28d9;
  --sc-success: #059669;
  --sc-error: #dc2626;
  --sc-radius: 12px;
  --sc-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);

  margin: 0;
  font-family: system-ui, -apple-system, 'Segoe UI', Roboto, 'PingFang SC', sans-serif;
  background: var(--sc-bg);
  color: var(--sc-text);
  line-height: 1.5;
}

.sc-header {
  background: var(--sc-surface);
  border-bottom: 1px solid var(--sc-border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.sc-header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0.75rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.sc-brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  color: inherit;
  font-weight: 600;
}

.sc-nav {
  display: flex;
  gap: 1rem;
}

.sc-nav a {
  color: var(--sc-muted);
  text-decoration: none;
  font-size: 0.9rem;
}

.sc-nav a:hover {
  color: var(--sc-primary);
}

.sc-main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1.25rem;
}

.sc-hero {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
}

.sc-hero__title {
  margin: 0 0 0.35rem;
  font-size: 1.75rem;
  font-weight: 700;
}

.sc-hero__desc {
  margin: 0;
  color: var(--sc-muted);
  font-size: 0.95rem;
}

.sc-quota-pill {
  font-size: 0.8rem;
  padding: 0.35rem 0.75rem;
  background: var(--sc-surface);
  border: 1px solid var(--sc-border);
  border-radius: 999px;
  color: var(--sc-muted);
  white-space: nowrap;
}

.sc-quick {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.65rem;
  margin-bottom: 1rem;
  padding: 0.75rem 1rem;
  background: var(--sc-surface);
  border-radius: var(--sc-radius);
  border: 1px solid var(--sc-border);
}

.sc-quick__label {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--sc-muted);
}

.sc-quick__buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.sc-quick-btn {
  font-size: 0.8rem;
  padding: 0.35rem 0.75rem;
  border: 1px solid var(--sc-border);
  border-radius: 999px;
  background: #faf5ff;
  color: var(--sc-primary);
  cursor: pointer;
  font-weight: 600;
}

.sc-quick-btn:hover {
  background: var(--sc-primary);
  color: #fff;
  border-color: var(--sc-primary);
}

.sc-status {
  margin-bottom: 1rem;
  padding: 0.65rem 1rem;
  border-radius: var(--sc-radius);
  font-size: 0.9rem;
  background: #ede9fe;
  color: #5b21b6;
}

.sc-status.is-error {
  background: #fef2f2;
  color: var(--sc-error);
}

.sc-status.is-success {
  background: #ecfdf5;
  color: var(--sc-success);
}

.sc-dropzone {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  min-height: 280px;
  padding: 2rem;
  background: var(--sc-surface);
  border: 2px dashed var(--sc-border);
  border-radius: var(--sc-radius);
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
}

.sc-dropzone:hover,
.sc-dropzone.is-dragover {
  border-color: var(--sc-primary);
  background: #faf5ff;
}

.sc-dropzone__icon {
  color: var(--sc-muted);
}

.sc-dropzone__title {
  font-size: 1.1rem;
  font-weight: 600;
}

.sc-dropzone__hint {
  font-size: 0.85rem;
  color: var(--sc-muted);
  text-align: center;
}

.sc-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  padding: 0.55rem 1.1rem;
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.15s, opacity 0.15s;
}

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

.sc-btn--primary:hover {
  background: var(--sc-primary-hover);
}

.sc-btn--ghost {
  background: transparent;
  border: 1px solid var(--sc-border);
  color: var(--sc-text);
}

.sc-btn--block {
  width: 100%;
}

.sc-btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.sc-info-card {
  margin-bottom: 1rem;
  padding: 1rem 1.25rem;
  background: var(--sc-surface);
  border: 1px solid var(--sc-border);
  border-radius: var(--sc-radius);
  box-shadow: var(--sc-shadow);
}

.sc-info-card__name {
  margin: 0 0 0.5rem;
  font-size: 1.05rem;
  font-weight: 600;
}

.sc-info-card__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.85rem;
  color: var(--sc-muted);
}

.sc-info-card__meta strong {
  color: var(--sc-text);
}

.sc-columns {
  display: grid;
  grid-template-columns: 220px 1fr 180px;
  gap: 1rem;
  align-items: start;
}

.sc-columns--dual {
  grid-template-columns: 220px 1fr;
}

.sc-format-panel {
  margin-bottom: 1rem;
  padding: 1.25rem;
  background: var(--sc-surface);
  border: 1px solid var(--sc-border);
  border-radius: var(--sc-radius);
  box-shadow: var(--sc-shadow);
}

.sc-format-panel__title {
  margin: 0 0 0.25rem;
  font-size: 1rem;
  font-weight: 700;
}

.sc-format-panel__hint {
  margin: 0 0 1rem;
  font-size: 0.85rem;
  color: var(--sc-muted);
}

.sc-col {
  background: var(--sc-surface);
  border: 1px solid var(--sc-border);
  border-radius: var(--sc-radius);
  padding: 1rem;
  min-height: 360px;
  box-shadow: var(--sc-shadow);
}

.sc-col__title {
  margin: 0 0 0.75rem;
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--sc-muted);
}

.sc-file-list {
  list-style: none;
  margin: 0 0 0.75rem;
  padding: 0;
}

.sc-file-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.55rem 0.65rem;
  border-radius: 8px;
  cursor: pointer;
  font-size: 0.88rem;
  margin-bottom: 0.25rem;
}

.sc-file-item:hover {
  background: #f8fafc;
}

.sc-file-item.is-active {
  background: #ede9fe;
  color: var(--sc-primary);
  font-weight: 600;
}

.sc-file-item__badge {
  font-size: 0.65rem;
  padding: 0.1rem 0.35rem;
  border-radius: 4px;
  background: #e2e8f0;
  color: var(--sc-muted);
  text-transform: uppercase;
}

.sc-file-item.is-output .sc-file-item__badge {
  background: #d1fae5;
  color: var(--sc-success);
}

.sc-preview {
  margin: 0;
  padding: 0.75rem;
  font-family: ui-monospace, 'Cascadia Code', Consolas, monospace;
  font-size: 0.78rem;
  line-height: 1.55;
  white-space: pre-wrap;
  word-break: break-word;
  max-height: 420px;
  overflow: auto;
  background: #f8fafc;
  border-radius: 8px;
  border: 1px solid var(--sc-border);
  color: #334155;
}

.sc-format-grid {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.sc-format-grid--prominent {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 0.65rem;
}

.sc-format-btn {
  width: 100%;
  padding: 0.85rem;
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  border: 2px solid var(--sc-primary);
  border-radius: 10px;
  background: #faf5ff;
  color: var(--sc-primary);
  cursor: pointer;
  transition: all 0.15s;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}

.sc-format-btn:hover,
.sc-format-btn:focus-visible {
  background: var(--sc-primary);
  color: #fff;
  border-color: var(--sc-primary);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(124, 58, 237, 0.25);
  outline: none;
}

.sc-format-btn:active {
  transform: translateY(0);
}

.sc-format-btn.is-loading {
  opacity: 0.7;
  pointer-events: none;
}

.sc-result {
  margin-top: 1rem;
}

.sc-result__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
  padding: 1.25rem;
  background: #ecfdf5;
  border: 1px solid #a7f3d0;
  border-radius: var(--sc-radius);
}

.sc-result__icon {
  font-size: 1.5rem;
}

.sc-result__body {
  flex: 1;
  min-width: 140px;
}

.sc-result__body strong {
  display: block;
  color: var(--sc-success);
}

.sc-result__body p {
  margin: 0.25rem 0 0;
  font-size: 0.9rem;
  color: var(--sc-muted);
}

.sc-result__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.sc-toast-host {
  position: fixed;
  bottom: 1.25rem;
  right: 1.25rem;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.sc-toast {
  padding: 0.75rem 1rem;
  border-radius: 8px;
  background: #1e293b;
  color: #fff;
  font-size: 0.88rem;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 0.2s, transform 0.2s;
}

.sc-toast.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.sc-toast.is-error {
  background: var(--sc-error);
}

@media (max-width: 1023px) {
  .sc-columns,
  .sc-columns--dual {
    grid-template-columns: 1fr;
  }

  .sc-col--preview {
    order: 3;
  }

  .sc-format-grid--prominent {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 480px) {
  .sc-hero__title {
    font-size: 1.35rem;
  }

  .sc-format-grid--prominent {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}