/* docs-chapter.css — chapter cards, AI prompt, preview status */

.lib-status--preview {
  color: var(--accent);
}

.detail-preview-note {
  margin: 0 0 var(--space-5);
  padding: 12px 14px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  background: var(--accent-soft);
  color: var(--text-secondary);
  font-size: var(--text-sm);
  max-width: 62ch;
}

[data-chapter-nav] {
  display: block;
  width: 100%;
  max-width: var(--content-max);
}

.chapter-nav {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: var(--space-6);
  width: 100%;
  margin-top: var(--space-8);
  padding-top: var(--space-6);
  border-top: 1px solid var(--border);
}

.chapter-nav__card {
  display: flex;
  flex-direction: column;
  justify-content: center;
  text-decoration: none;
  color: inherit;
  padding: var(--space-5);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--surface);
  min-height: 140px;
  min-width: 0;
  transition:
    border-color var(--duration-medium) var(--ease-standard),
    background-color var(--duration-medium) var(--ease-standard);
}

.chapter-nav__card:hover,
.chapter-nav__card:focus-visible {
  border-color: var(--border-strong);
  outline: none;
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.chapter-nav__card--next {
  text-align: right;
}

.chapter-nav__card--empty {
  border: 0;
  background: transparent;
  min-height: 0;
  padding: 0;
}

.chapter-nav__dir {
  display: block;
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-tertiary);
  margin-bottom: var(--space-2);
}

.chapter-nav__card strong {
  display: block;
  font-size: var(--text-lg);
  letter-spacing: -0.02em;
  margin-bottom: var(--space-2);
  overflow-wrap: anywhere;
}

.chapter-nav__card p {
  margin: 0;
  color: var(--text-secondary);
  font-size: var(--text-sm);
  line-height: var(--leading-normal);
  overflow-wrap: anywhere;
}

.ai-prompt-section {
  margin-top: var(--space-8);
  margin-bottom: var(--space-6);
}

.ai-prompt-section__head h2 {
  margin: 0 0 var(--space-3);
}

.ai-prompt-section__head p {
  color: var(--text-secondary);
  max-width: 62ch;
}

.ai-prompt-card {
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--code-bg);
  color: var(--code-text);
}

.ai-prompt-card__bar {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  align-items: center;
  justify-content: space-between;
  padding: 12px 14px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(255, 255, 255, 0.03);
}

.ai-prompt-card__meta {
  font-size: var(--text-xs);
  letter-spacing: 0.04em;
  color: rgba(215, 218, 224, 0.7);
}

.ai-prompt-card__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.ai-prompt-card__actions .lim-btn {
  min-height: 36px;
  padding: 0 12px;
  border-color: rgba(255, 255, 255, 0.14);
  background: transparent;
  color: #fff;
}

.ai-prompt-card__actions .lim-btn--primary {
  background: var(--accent);
  border-color: transparent;
}

.ai-prompt-card__code {
  margin: 0;
  padding: var(--space-5);
  max-height: 180px;
  overflow: auto;
  font-family: var(--lim-font-mono);
  font-size: 0.85rem;
  line-height: 1.55;
  white-space: pre-wrap;
}

.ai-prompt-card__code.is-expanded {
  max-height: none;
}

.status-legend {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin: var(--space-4) 0 var(--space-5);
}

.status-legend span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-tertiary);
}

@media (max-width: 768px) {
  .chapter-nav {
    grid-template-columns: 1fr;
  }

  .chapter-nav__card--next {
    text-align: left;
  }
}


.ai-prompt-translate {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: var(--space-4);
  min-height: 28px;
}

.ai-prompt-translate__label {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  line-height: 1.3;
  user-select: none;
}

.ai-prompt-translate__hint {
  margin: 8px 0 0 !important;
  font-size: var(--text-xs) !important;
  color: var(--text-tertiary) !important;
  max-width: 52ch;
  line-height: 1.45;
}

.ai-prompt-switch {
  position: relative;
  width: 44px;
  height: 26px;
  flex-shrink: 0;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface-2, var(--bg-elevated));
  cursor: pointer;
  transition: background-color 180ms ease, border-color 180ms ease;
}

.ai-prompt-switch:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.ai-prompt-switch__knob {
  position: absolute;
  top: 2px;
  left: 2px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--text-primary);
  box-shadow: 0 1px 3px rgba(16, 17, 20, 0.18);
  transition: transform 180ms ease, background-color 180ms ease;
}

.ai-prompt-switch[aria-checked="true"] {
  border-color: color-mix(in srgb, var(--accent) 45%, var(--border));
  background: color-mix(in srgb, var(--accent) 14%, var(--surface-2, var(--bg-elevated)));
}

.ai-prompt-switch[aria-checked="true"] .ai-prompt-switch__knob {
  transform: translateX(18px);
  background: var(--accent);
}