/* ===================================================
   Music Content Pipeline ドキュメント共通スタイル
   Design: 和モダン × AI × ミニマル (言葉屋 C案準拠)
   =================================================== */

.doc-page {
  padding: 48px 0 100px;
}

.doc-breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 0.82rem;
  color: var(--color-muted);
  margin-bottom: 32px;
  font-family: var(--font-sans);
}

.doc-breadcrumb a {
  color: var(--color-muted);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.doc-breadcrumb a:hover {
  color: var(--color-blue-accent);
  text-decoration: underline;
}

.doc-breadcrumb span {
  opacity: 0.5;
}

.doc-container {
  max-width: 780px;
  margin: 0 auto;
}

.doc-header {
  margin-bottom: 40px;
}

.doc-header h1 {
  font-size: clamp(2rem, 5vw, 2.75rem);
  font-family: var(--font-serif);
  color: var(--color-ink);
  line-height: 1.28;
  margin: 12px 0 16px;
  letter-spacing: 0.02em;
}

.doc-updated {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--color-muted);
  margin-bottom: 16px;
  padding: 4px 10px;
  background: var(--color-paper-alt);
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-line);
}

.doc-lead {
  font-size: 1.02rem;
  line-height: 1.9;
  color: var(--color-ink-soft);
  margin-top: 16px;
}

.doc-section {
  padding: 28px 0;
  border-top: 1px solid var(--color-line);
}

.doc-section h2 {
  font-size: 1.25rem;
  font-family: var(--font-serif);
  color: var(--color-ink);
  margin: 0 0 14px;
  letter-spacing: 0.01em;
  line-height: 1.45;
}

.doc-section p {
  color: var(--color-ink-soft);
  line-height: 1.9;
  margin: 0 0 14px;
}

.doc-section p:last-child {
  margin-bottom: 0;
}

.doc-section ul {
  display: grid;
  gap: 8px;
  padding-left: 1.35rem;
  margin: 12px 0 16px;
  color: var(--color-ink-soft);
  line-height: 1.85;
}

.doc-section ul li::marker {
  color: var(--color-blue-accent);
}

.doc-meta-list {
  display: grid;
  gap: 8px;
  margin: 12px 0;
}

.doc-meta-row {
  display: flex;
  align-items: baseline;
  gap: 12px;
  font-size: 0.95rem;
}

.doc-meta-row strong {
  min-width: 90px;
  color: var(--color-ink);
}

.doc-meta-row a {
  color: var(--color-blue-accent);
  text-decoration: underline;
  text-underline-offset: 3px;
  word-break: break-all;
}

.doc-nav-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
  margin-top: 20px;
}

.doc-nav-card {
  display: block;
  padding: 22px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  background: var(--color-paper-card);
  text-decoration: none;
  transition: transform var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.doc-nav-card:hover {
  transform: translateY(-2px);
  border-color: var(--color-blue-accent);
  box-shadow: 0 8px 24px rgba(18, 34, 56, 0.06);
}

.doc-nav-card-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--color-blue-accent);
  letter-spacing: 0.08em;
  display: block;
  margin-bottom: 6px;
}

.doc-nav-card-title {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-ink);
  display: block;
  margin-bottom: 6px;
}

.doc-nav-card-desc {
  font-size: 0.86rem;
  color: var(--color-muted);
  line-height: 1.6;
  margin: 0;
}

.doc-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 36px;
  padding-top: 28px;
  border-top: 1px solid var(--color-line);
}

@media (max-width: 640px) {
  .doc-page {
    padding: 32px 0 64px;
  }
  .doc-nav-cards {
    grid-template-columns: 1fr;
  }
}