:root,
:root[data-theme="light"] {
  --bg: #f8fafc;
  --surface: #ffffff;
  --subtle: #f1f5f9;
  --border: #e2e8f0;
  --text: #0f172a;
  --muted: #64748b;
  --primary: #0f172a;
  --primary-fg: #ffffff;
  --soft-btn-bg: #e0f2fe;
  --soft-btn-text: #0369a1;
  --soft-btn-border: #bae6fd;
  --soft-btn-hover: #bae6fd;
  --radius: 14px;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0b0f17;
    --surface: #111827;
    --subtle: #1e293b;
    --border: #1f2937;
    --text: #f8fafc;
    --muted: #94a3b8;
    --primary: #f8fafc;
    --primary-fg: #0f172a;
    --soft-btn-bg: rgba(14, 165, 233, 0.15);
    --soft-btn-text: #7dd3fc;
    --soft-btn-border: rgba(56, 189, 248, 0.3);
    --soft-btn-hover: rgba(14, 165, 233, 0.24);
  }
}

:root[data-theme="dark"] {
  --bg: #0b0f17;
  --surface: #111827;
  --subtle: #1e293b;
  --border: #1f2937;
  --text: #f8fafc;
  --muted: #94a3b8;
  --primary: #f8fafc;
  --primary-fg: #0f172a;
  --soft-btn-bg: rgba(14, 165, 233, 0.15);
  --soft-btn-text: #7dd3fc;
  --soft-btn-border: rgba(56, 189, 248, 0.3);
  --soft-btn-hover: rgba(14, 165, 233, 0.24);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  -webkit-font-smoothing: antialiased;
  transition: background-color 180ms ease, color 180ms ease;
}

.shell {
  width: 100%;
  max-width: 540px;
}

.card {
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 1.75rem;
  box-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.06);
  transition: background-color 180ms ease, border-color 180ms ease;
}

.brand-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.55rem;
  margin-bottom: 0.35rem;
}

.brand-left {
  display: flex;
  align-items: center;
  gap: 0.55rem;
}

.theme-toggle-btn {
  width: 30px;
  height: 30px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background-color: var(--bg);
  color: var(--muted);
  font-size: 0.85rem;
  line-height: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  flex-shrink: 0;
  transition: background-color 150ms ease, color 150ms ease, border-color 150ms ease;
}

.theme-toggle-btn:hover {
  background-color: var(--subtle);
  color: var(--text);
  border-color: var(--muted);
}

.brand-badge {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.18rem 0.5rem;
  border-radius: 6px;
  background-color: var(--soft-btn-bg);
  color: var(--soft-btn-text);
  border: 1px solid var(--soft-btn-border);
  letter-spacing: -0.02em;
}

.card-header h1 {
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.card-header p {
  font-size: 0.875rem;
  color: var(--muted);
  line-height: 1.45;
}

.input-bar {
  margin-top: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.input-field-wrap {
  position: relative;
  flex: 1;
  display: flex;
  align-items: center;
}

.url-input {
  width: 100%;
  height: 44px;
  padding: 0 4.8rem 0 0.9rem;
  border-radius: 10px;
  border: 1px solid var(--border);
  background-color: var(--bg);
  color: var(--text);
  font-size: 0.9rem;
  outline: none;
  transition: border-color 150ms ease;
}

.url-input:focus {
  border-color: var(--text);
}

.inline-actions {
  position: absolute;
  right: 0.35rem;
  display: flex;
  align-items: center;
}

.ghost-btn {
  padding: 0.35rem 0.65rem;
  border-radius: 7px;
  border: 1px solid var(--soft-btn-border);
  background-color: var(--soft-btn-bg);
  color: var(--soft-btn-text);
  font-size: 0.75rem;
  font-weight: 500;
  cursor: pointer;
  transition: background-color 150ms ease;
}

.ghost-btn:hover {
  background-color: var(--soft-btn-hover);
}

.primary-btn {
  width: 100%;
  height: 44px;
  padding: 0 1.1rem;
  border-radius: 10px;
  border: 1px solid var(--primary);
  background-color: var(--primary);
  color: var(--primary-fg);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  white-space: nowrap;
  transition: background-color 150ms ease, color 150ms ease, border-color 150ms ease;
}

.primary-btn.secondary-mode {
  background-color: var(--soft-btn-bg);
  color: var(--soft-btn-text);
  border-color: var(--soft-btn-border);
}

.primary-btn.secondary-mode:hover {
  background-color: var(--soft-btn-hover);
}

.primary-btn:disabled {
  opacity: 0.6;
  cursor: wait;
}

.hidden {
  display: none !important;
}

.feedback {
  margin-top: 0.75rem;
  padding: 0.65rem 0.85rem;
  border-radius: 10px;
  background-color: var(--subtle);
  color: var(--muted);
  font-size: 0.8rem;
}

.loading {
  margin-top: 1.25rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.8rem;
  color: var(--muted);
}

.spinner {
  width: 15px;
  height: 15px;
  border: 2px solid var(--text);
  border-right-color: transparent;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.result {
  margin-top: 1.25rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border);
}

.carousel-tabs {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 0.85rem;
}

.carousel-tabs-label {
  font-size: 0.74rem;
  font-weight: 600;
  color: var(--muted);
  margin-right: 0.25rem;
}

.carousel-tab-btn {
  padding: 0.28rem 0.65rem;
  border-radius: 7px;
  border: 1px solid var(--border);
  background-color: var(--bg);
  color: var(--muted);
  font-size: 0.75rem;
  font-weight: 600;
  cursor: pointer;
  transition: background-color 150ms ease, color 150ms ease, border-color 150ms ease;
}

.carousel-tab-btn:hover {
  background-color: var(--subtle);
  color: var(--text);
}

.carousel-tab-btn.active {
  background-color: var(--soft-btn-bg);
  color: var(--soft-btn-text);
  border-color: var(--soft-btn-border);
}

.media-summary {
  display: flex;
  align-items: flex-start;
  gap: 1.05rem;
  margin-bottom: 1.25rem;
  padding: 1rem;
  border-radius: 14px;
  background-color: var(--bg);
  border: 1px solid var(--border);
}

.thumb-wrap {
  width: 144px;
  height: 112px;
  border-radius: 10px;
  overflow: hidden;
  background-color: var(--subtle);
  border: 1px solid var(--border);
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  cursor: pointer;
  transition: width 200ms ease, height 200ms ease;
}

.thumb-wrap.playing {
  width: 184px;
  height: 140px;
  background-color: #000000;
  cursor: default;
}

.video-thumb {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.video-preview-player {
  width: 100%;
  height: 100%;
  object-fit: contain;
  background-color: #000000;
  display: block;
}

.thumb-placeholder {
  color: var(--muted);
  display: flex;
  align-items: center;
  justify-content: center;
}

.thumb-play-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: rgba(15, 23, 42, 0.22);
  transition: background-color 150ms ease;
}

.thumb-wrap:hover .thumb-play-overlay {
  background-color: rgba(15, 23, 42, 0.36);
}

.play-circle {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background-color: rgba(15, 23, 42, 0.78);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  padding-left: 2px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.25);
  transition: transform 150ms ease;
}

.thumb-wrap:hover .play-circle {
  transform: scale(1.08);
}

.media-info {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
}

.result-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem;
  margin-bottom: 0.5rem;
}

.result-meta {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  min-width: 0;
}

.source-badge {
  padding: 0.2rem 0.55rem;
  border-radius: 6px;
  background-color: var(--subtle);
  font-size: 0.76rem;
  font-weight: 600;
  flex-shrink: 0;
}

.video-uploader {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.result-actions-right {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  flex-shrink: 0;
}

.copy-desc-btn {
  padding: 0.22rem 0.55rem;
  border-radius: 6px;
  border: 1px solid var(--soft-btn-border);
  background-color: var(--soft-btn-bg);
  color: var(--soft-btn-text);
  font-size: 0.72rem;
  font-weight: 500;
  cursor: pointer;
  transition: background-color 150ms ease, color 150ms ease;
}

.copy-desc-btn:hover {
  background-color: var(--soft-btn-hover);
}

.copy-desc-btn.copied {
  background-color: rgba(16, 185, 129, 0.14);
  color: #059669;
  border-color: rgba(16, 185, 129, 0.35);
}

.video-duration {
  position: absolute;
  bottom: 0.4rem;
  right: 0.4rem;
  padding: 0.14rem 0.42rem;
  border-radius: 5px;
  background-color: rgba(15, 23, 42, 0.82);
  color: #f8fafc;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.01em;
  pointer-events: none;
}

.video-description {
  font-size: 0.92rem;
  line-height: 1.52;
  color: var(--text);
  display: -webkit-box;
  -webkit-line-clamp: 6;
  -webkit-box-orient: vertical;
  overflow: hidden;
  word-break: break-word;
  cursor: pointer;
}

.video-description.expanded {
  display: block;
  -webkit-line-clamp: unset;
}

.toggle-desc-btn {
  align-self: flex-start;
  margin-top: 0.3rem;
  background: none;
  border: none;
  padding: 0;
  color: var(--soft-btn-text);
  font-size: 0.76rem;
  font-weight: 600;
  cursor: pointer;
}

.toggle-desc-btn:hover {
  text-decoration: underline;
}

.options-block + .options-block {
  margin-top: 1.1rem;
  padding-top: 1rem;
  border-top: 1px dashed var(--border);
}

.block-title {
  font-size: 0.74rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--muted);
  margin-bottom: 0.55rem;
}

.options-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.option-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.75rem 0.9rem;
  border-radius: 10px;
  border: 1px solid var(--border);
  background-color: var(--bg);
}

.option-title-row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.option-label {
  font-size: 0.85rem;
  font-weight: 500;
}

.rec-badge {
  font-size: 0.68rem;
  font-weight: 600;
  padding: 0.12rem 0.45rem;
  border-radius: 5px;
  background-color: var(--soft-btn-bg);
  color: var(--soft-btn-text);
  border: 1px solid var(--soft-btn-border);
}

.option-meta {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--muted);
  margin-top: 0.15rem;
}

.option-actions {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  flex-shrink: 0;
}

.share-file-btn {
  padding: 0.45rem 0.65rem;
  border-radius: 8px;
  border: 1px solid var(--soft-btn-border);
  background-color: var(--soft-btn-bg);
  color: var(--soft-btn-text);
  font-size: 0.75rem;
  font-weight: 600;
  cursor: pointer;
  transition: background-color 150ms ease;
}

.share-file-btn:hover {
  background-color: var(--soft-btn-hover);
}

.dl-btn {
  padding: 0.45rem 0.85rem;
  min-width: 112px;
  text-align: center;
  border-radius: 8px;
  border: 1px solid var(--border);
  background-color: var(--surface);
  color: var(--text);
  font-size: 0.78rem;
  font-weight: 600;
  cursor: pointer;
  flex-shrink: 0;
  transition: background-color 150ms ease, color 150ms ease, border-color 150ms ease;
}

.dl-btn.primary {
  background-color: var(--primary);
  color: var(--primary-fg);
  border-color: var(--primary);
}

.dl-btn.downloading {
  background-color: var(--surface);
  color: var(--soft-btn-text);
  border-color: var(--soft-btn-border);
  background-image: linear-gradient(
    90deg,
    var(--soft-btn-bg) var(--dl-progress, 0%),
    transparent var(--dl-progress, 0%)
  );
  cursor: wait;
}

.dl-btn.done {
  background-color: rgba(16, 185, 129, 0.14);
  color: #059669;
  border-color: rgba(16, 185, 129, 0.35);
}

@media (max-width: 480px) {
  .input-bar {
    flex-direction: column;
  }

  .media-summary {
    flex-direction: column;
  }

  .thumb-wrap,
  .thumb-wrap.playing {
    width: 100%;
    height: 184px;
  }
}

.seo-copy {
  margin-top: 1.5rem;
  padding: 0 0.25rem;
  color: var(--muted);
  font-size: 0.82rem;
  line-height: 1.55;
}

.seo-copy h2 {
  font-size: 0.95rem;
  color: var(--text);
  margin-bottom: 0.4rem;
}

.seo-copy h3 {
  font-size: 0.82rem;
  color: var(--text);
  margin: 0.8rem 0 0.15rem;
}