:root {
  --primary: #1f6feb;
  --primary-hover: #3880f5;
  --danger: #da3633;
  --bg: #0d1117;
  --card-bg: #161b22;
  --border: #30363d;
  --text: #c9d1d9;
  --text-muted: #8b949e;
  --success: #3fb950;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  line-height: 1.5;
}

.container {
  max-width: 820px;
  margin: 40px auto;
  padding: 0 20px;
}

header {
  text-align: center;
  margin-bottom: 32px;
}

h1 {
  font-size: 2.2rem;
  margin: 0 0 8px;
  font-weight: 600;
}

.subtitle {
  color: var(--text-muted);
  margin: 0;
  font-size: 1.05rem;
}

.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 28px;
  margin-bottom: 24px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.upload-zone {
  border: 2px dashed var(--border);
  border-radius: 12px;
  padding: 48px 24px;
  text-align: center;
  transition: all 0.2s ease;
  cursor: pointer;
}

.upload-zone.dragover {
  border-color: var(--primary);
  background: rgba(31, 111, 235, 0.05);
}

.upload-icon {
  font-size: 48px;
  margin-bottom: 12px;
}

.upload-zone h3 {
  margin: 12px 0 8px;
  font-size: 1.25rem;
}

.upload-zone .hint {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 16px;
}

.file-info {
  margin: 20px 0;
  padding: 16px;
  background: #21262d;
  border-radius: 8px;
  border: 1px solid var(--border);
}

.file-details {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}

.file-size {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-left: 8px;
}

.btn {
  background: #21262d;
  color: var(--text);
  border: 1px solid var(--border);
  padding: 10px 20px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.btn:hover {
  background: #30363d;
  border-color: #484f58;
}

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

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

.btn.danger {
  background: var(--danger);
  border-color: var(--danger);
  color: white;
}

.btn.danger:hover {
  background: #c22c2a;
  border-color: #c22c2a;
}

.btn.small {
  padding: 6px 12px;
  font-size: 13px;
}

.btn.large {
  padding: 14px 28px;
  font-size: 16px;
  width: 100%;
  margin-top: 12px;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.hidden {
  display: none !important;
}

.status-line {
  display: grid;
  grid-template-columns: 1.4fr 1fr auto;
  gap: 16px;
  margin-bottom: 20px;
}

@media (max-width: 640px) {
  .status-line {
    grid-template-columns: 1fr;
  }
}

.status-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.status-item .label {
  font-size: 12px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.status-item .value {
  font-family: ui-monospace, monospace;
  font-size: 15px;
  word-break: break-all;
}

.status-badge {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  background: #21262d;
  border: 1px solid var(--border);
  width: fit-content;
}

.status-badge.pending { background: #21262d; color: #d29922; border-color: #d29922; }
.status-badge.processing { background: #21262d; color: #58a6ff; border-color: #58a6ff; }
.status-badge.completed { background: #21262d; color: var(--success); border-color: var(--success); }
.status-badge.failed { background: #21262d; color: var(--danger); border-color: var(--danger); }

.progress-container {
  margin: 16px 0;
}

.progress-bar {
  height: 8px;
  background: #21262d;
  border-radius: 999px;
  overflow: hidden;
  border: 1px solid var(--border);
  position: relative;
}

.progress-fill {
  height: 100%;
  background: var(--primary);
  width: 0%;
  transition: width 0.3s ease;
}

.progress-bar.indeterminate .progress-fill {
  width: 32%;
  transition: none;
  animation: progress-slide 1.35s ease-in-out infinite;
}

.progress-text {
  margin-top: 8px;
  font-size: 13px;
  color: var(--text-muted);
}

.progress-hint {
  margin: 6px 0 0;
  font-size: 12px;
  color: var(--text-muted);
}

.stage-list {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 8px;
  padding: 0;
  margin: 0 0 18px;
}

.stage-list li {
  border-top: 2px solid var(--border);
  padding-top: 8px;
  font-size: 11px;
  color: var(--text-muted);
  line-height: 1.3;
}

.stage-list li.done {
  border-top-color: var(--success);
  color: var(--success);
}

.stage-list li.active {
  border-top-color: var(--primary);
  color: #79b8ff;
  font-weight: 600;
}

.stage-list li.skip {
  opacity: 0.4;
}

@media (max-width: 720px) {
  .stage-list {
    grid-template-columns: repeat(3, 1fr);
  }
}

@keyframes progress-slide {
  0% { transform: translateX(-120%); }
  100% { transform: translateX(380%); }
}

@media (prefers-reduced-motion: reduce) {
  .progress-bar.indeterminate .progress-fill {
    animation: none;
    width: 45%;
  }
}

.status-log {
  background: #0d1117;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px 16px;
  font-family: ui-monospace, monospace;
  font-size: 13px;
  max-height: 160px;
  overflow-y: auto;
  margin-bottom: 16px;
  color: #8b949e;
}

.actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 20px;
}

.result-info {
  background: #21262d;
  border-radius: 8px;
  padding: 16px;
  margin-bottom: 20px;
  border: 1px solid var(--border);
}

.result-info > div + div {
  margin-top: 12px;
}

.hls-link {
  color: #58a6ff;
  word-break: break-all;
  font-family: ui-monospace, monospace;
  font-size: 14px;
}

.player-wrapper {
  margin: 20px 0;
  background: #000;
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid var(--border);
}

.error-card {
  border-color: var(--danger);
  background: #2d1f1f;
}

.error-card h2 {
  color: var(--danger);
}

.user-bar {
  margin-top: 16px;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 12px;
  color: var(--text-muted);
  font-size: 14px;
}

.auth-tabs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-bottom: 20px;
}

.auth-tab {
  background: #21262d;
  color: var(--text-muted);
  border: 1px solid var(--border);
  padding: 10px 12px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 14px;
  font-weight: 600;
}

.auth-tab.active {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}

.auth-form label {
  display: block;
  font-size: 12px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.4px;
  margin: 12px 0 6px;
}

.auth-form input {
  width: 100%;
  background: #0d1117;
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 12px;
  font-size: 15px;
}

.auth-form input:focus {
  outline: none;
  border-color: var(--primary);
}

.auth-error {
  color: #ff7b72;
  font-size: 13px;
  margin: 12px 0 0;
}

.library-empty {
  color: var(--text-muted);
  font-size: 14px;
  margin: 0;
}

.library-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.library-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  background: #21262d;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px 14px;
  cursor: pointer;
  text-align: left;
  color: inherit;
  width: 100%;
}

.library-item:hover {
  border-color: #484f58;
}

.library-item .lib-name {
  font-size: 14px;
  word-break: break-all;
}

.library-item .lib-meta {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 4px;
}

footer {
  text-align: center;
  color: var(--text-muted);
  font-size: 13px;
  margin-top: 40px;
}

footer code {
  background: #21262d;
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 12px;
}

/* ==================== Preview Options ==================== */
.preview-options {
  margin: 16px 0 8px;
  padding: 14px 16px;
  background: #21262d;
  border: 1px solid var(--border);
  border-radius: 8px;
}

.preview-checkbox {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  font-size: 15px;
  user-select: none;
}

.preview-checkbox input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--primary);
  cursor: pointer;
}

.preview-duration {
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.preview-duration label {
  font-size: 13px;
  color: var(--text-muted);
}

.preview-duration input[type="number"] {
  width: 80px;
  background: #0d1117;
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 6px 10px;
  font-size: 14px;
}

.preview-duration input[type="number"]:focus {
  outline: none;
  border-color: var(--primary);
}

.hint-small {
  font-size: 12px;
  color: var(--text-muted);
  margin-left: 4px;
}

/* (preview-result section removed: animated preview is rendered as overlay-image cover inside the result hls-player) */