:root {
  --bg: #0f0f0f;
  --surface: #1a1a1a;
  --surface-raised: #242424;
  --border: #333;
  --text: #e8e8e8;
  --text-muted: #888;
  --accent: #6c5ce7;
  --accent-hover: #7c6cf7;
  --danger: #e74c3c;
  --success: #2ecc71;
  --warning: #f39c12;
  --radius: 10px;
}

*, *::before, *::after {
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  margin: 0;
  padding: 0;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
}

h1 {
  font-size: 2rem;
  margin: 0 0 0.25rem;
}

h2 {
  font-size: 1.25rem;
  margin: 2.5rem 0 1rem;
  color: var(--text-muted);
  font-weight: 500;
}

.subtitle {
  color: var(--text-muted);
  margin: 0 0 2rem;
}

.generation-nav {
  display: inline-flex;
  gap: 0.4rem;
  padding: 0.35rem;
  margin-bottom: 1.5rem;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border);
  border-radius: 999px;
}

.generation-nav__link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 88px;
  padding: 0.45rem 0.9rem;
  border-radius: 999px;
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 600;
  transition: background 0.15s, color 0.15s;
}

.generation-nav__link:hover {
  color: var(--text);
  background: rgba(255, 255, 255, 0.04);
}

.generation-nav__link.is-active {
  color: white;
  background: var(--accent);
}

/* Form */
.generation-form {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
}

.form-group {
  margin-bottom: 1.25rem;
}

.form-group label,
.generation-form legend {
  display: block;
  font-weight: 600;
  margin-bottom: 0.5rem;
  font-size: 0.9rem;
}

.generation-form legend small {
  font-weight: 400;
  color: var(--text-muted);
}

.generation-form fieldset {
  border: none;
  padding: 0;
  margin: 0 0 1.25rem;
}

.form-group textarea,
.form-group select {
  width: 100%;
  background: var(--surface-raised);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  padding: 0.6rem 0.75rem;
  font-size: 0.95rem;
  font-family: inherit;
  resize: vertical;
}

.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(108, 92, 231, 0.25);
}

.form-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 1rem;
}

.form-row .form-group {
  margin-bottom: 0;
}

.model-checkboxes {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.model-checkbox {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  background: var(--surface-raised);
  border: 1px solid var(--border);
  border-radius: 6px;
  cursor: pointer;
  transition: border-color 0.15s;
}

.model-checkbox:hover {
  border-color: var(--accent);
}

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

.model-label {
  display: flex;
  flex-direction: column;
  line-height: 1.3;
}

.model-label code {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.model-detail {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.form-actions {
  margin-top: 1.5rem;
}

.btn-primary {
  display: inline-block;
  background: var(--accent);
  color: white;
  border: none;
  padding: 0.7rem 1.5rem;
  border-radius: 6px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s;
}

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

.error-messages {
  background: rgba(231, 76, 60, 0.15);
  border: 1px solid var(--danger);
  border-radius: 6px;
  padding: 0.75rem 1rem;
  margin-bottom: 1rem;
}

.error-messages p {
  margin: 0;
  color: var(--danger);
  font-size: 0.9rem;
}

/* Generations list */
.generations-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.generation-card {
  display: block;
  padding: 1rem 1.25rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  text-decoration: none;
  color: var(--text);
  transition: border-color 0.15s;
}

.generation-card:hover {
  border-color: var(--accent);
}

.generation-prompt {
  margin-bottom: 0.35rem;
}

.generation-meta {
  font-size: 0.8rem;
  color: var(--text-muted);
  display: flex;
  gap: 0.4rem;
}

/* Show page */
.show-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1rem;
}

.back-link {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9rem;
}

.back-link:hover {
  color: var(--text);
}

.prompt-display {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  margin-bottom: 2rem;
}

.prompt-display p {
  margin: 0 0 0.5rem;
  font-size: 1.1rem;
}

.prompt-meta {
  display: flex;
  gap: 0.5rem;
}

.tag {
  display: inline-block;
  background: var(--surface-raised);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.15rem 0.5rem;
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* Items grid */
.items-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.25rem;
}

.item-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.item-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border);
  gap: 0.75rem;
}

.status-badge {
  font-size: 0.75rem;
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.status-badge.status-submitting,
.status-badge.status-pending {
  background: rgba(108, 92, 231, 0.2);
  color: var(--accent);
}

.status-badge.status-in_progress {
  background: rgba(243, 156, 18, 0.2);
  color: var(--warning);
}

.status-badge.status-completed {
  background: rgba(46, 204, 113, 0.2);
  color: var(--success);
}

.status-badge.status-failed,
.status-badge.status-cancelled,
.status-badge.status-expired {
  background: rgba(231, 76, 60, 0.2);
  color: var(--danger);
}

.item-body {
  padding: 1rem;
}

.video-player,
.audio-player {
  width: 100%;
  display: block;
}

.video-player {
  border-radius: 6px;
}

.audio-player {
  min-height: 54px;
}

.item-copy {
  margin: 0.85rem 0 0;
  color: var(--text-muted);
  font-size: 0.9rem;
  white-space: pre-wrap;
}

.error-display {
  text-align: center;
  color: var(--danger);
  padding: 2rem 1rem;
}

.error-display p {
  margin: 0;
  font-size: 0.9rem;
}

.loading-display {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--text-muted);
}

.loading-display p {
  margin: 0.75rem 0 0;
  font-size: 0.9rem;
}

/* Spinner */
.spinner {
  display: inline-block;
  width: 32px;
  height: 32px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

/* Responsive */
@media (max-width: 600px) {
  .container {
    padding: 1rem;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .items-grid {
    grid-template-columns: 1fr;
  }
}