/* Guide — layout mục lục trái + nội dung đọc */
.sa-guide {
  display: grid;
  grid-template-columns: minmax(220px, 260px) minmax(0, 1fr);
  gap: var(--sa-space-6);
  align-items: start;
  max-width: 1180px;
}

.sa-guide-sidebar {
  position: sticky;
  top: var(--sa-space-4);
  max-height: calc(100vh - var(--sa-space-8));
  z-index: 2;
}

.sa-guide-sidebar-inner {
  background: var(--sa-surface);
  border: 1px solid var(--sa-border);
  border-radius: var(--sa-radius-md);
  padding: var(--sa-space-4);
  max-height: inherit;
  overflow: auto;
  overscroll-behavior: contain;
}

.sa-guide-sidebar-title {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--sa-text-faint);
  margin-bottom: var(--sa-space-3);
}

.sa-guide-toc {
  display: flex;
  flex-direction: column;
  gap: var(--sa-space-4);
}

.sa-guide-toc-part + .sa-guide-toc-part {
  padding-top: var(--sa-space-3);
  border-top: 1px solid var(--sa-border);
}

.sa-guide-toc-part-label {
  display: block;
  font-size: 11.5px;
  font-weight: 600;
  color: var(--sa-text-soft);
  line-height: 1.35;
  margin-bottom: 6px;
  padding: 0 8px;
}

.sa-guide-toc-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.sa-guide-toc-link {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  padding: 7px 10px;
  border-radius: var(--sa-radius-sm);
  font-size: 13.5px;
  font-weight: 500;
  line-height: 1.4;
  color: var(--sa-text-soft);
  text-decoration: none;
  border-left: 2px solid transparent;
  transition: background 0.12s ease, color 0.12s ease, border-color 0.12s ease;
}

.sa-guide-toc-link:hover {
  background: var(--sa-paper);
  color: var(--sa-text);
  text-decoration: none;
}

.sa-guide-toc-link.sa-active {
  background: var(--sa-primary-soft);
  color: var(--sa-text);
  border-left-color: var(--sa-accent-line);
  font-weight: 600;
}

.sa-guide-toc-num {
  flex-shrink: 0;
  min-width: 1.25rem;
  font-family: var(--sa-font-mono);
  font-size: 11px;
  font-weight: 700;
  color: var(--sa-text-faint);
  margin-top: 2px;
}

.sa-guide-toc-link.sa-active .sa-guide-toc-num {
  color: var(--sa-link);
}

.sa-guide-content {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: var(--sa-space-6);
}

/* Typography — tối ưu đọc dài */
.sa-guide-prose {
  font-size: 15px;
  line-height: 1.75;
  color: var(--sa-text);
  letter-spacing: -0.01em;
}

.sa-guide-prose p {
  margin: 0 0 0.9em;
  color: var(--sa-text-soft);
}

.sa-guide-prose p:last-child {
  margin-bottom: 0;
}

.sa-guide-prose strong {
  color: var(--sa-text);
  font-weight: 600;
}

.sa-guide-prose ul,
.sa-guide-prose ol {
  margin: 0 0 1em;
  padding-left: 1.35rem;
  color: var(--sa-text-soft);
}

.sa-guide-prose li + li {
  margin-top: 0.35em;
}

.sa-guide-prose li::marker {
  color: var(--sa-text-faint);
}

.sa-guide-prose h3.sa-section-title {
  font-size: 1.125rem;
  line-height: 1.35;
  margin-bottom: 0.75rem;
}

.sa-guide-prose h4 {
  font-size: 0.9375rem;
  line-height: 1.4;
  margin: 1.25rem 0 0.5rem;
  color: var(--sa-text);
  font-weight: 600;
}

.sa-guide-prose pre {
  font-size: 12px;
  line-height: 1.55;
}

.sa-guide-prose code.sa-mono {
  font-size: 0.85em;
}

.sa-guide-prose .sa-table {
  font-size: 13.5px;
}

.sa-guide-prose .sa-card {
  scroll-margin-top: var(--sa-space-4);
}

.sa-guide-part-title {
  scroll-margin-top: var(--sa-space-4);
  padding-top: var(--sa-space-2);
}

.sa-guide-part-title h2 {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--sa-text-faint);
  border-bottom: 1px solid var(--sa-border);
  padding-bottom: var(--sa-space-2);
  margin: 0;
}

.sa-guide-footer {
  text-align: center;
  font-size: 12px;
  color: var(--sa-text-faint);
  padding-top: var(--sa-space-4);
}

@media (max-width: 960px) {
  .sa-guide {
    grid-template-columns: 1fr;
    gap: var(--sa-space-4);
  }

  .sa-guide-sidebar {
    position: sticky;
    top: 0;
    max-height: none;
    margin: 0 calc(-1 * var(--sa-space-4));
    padding: 0 var(--sa-space-4) var(--sa-space-2);
    background: linear-gradient(var(--sa-paper) 70%, transparent);
  }

  .sa-guide-sidebar-inner {
    max-height: 42vh;
    box-shadow: 0 4px 16px -8px rgba(0, 0, 0, 0.12);
  }

  .sa-guide-prose {
    font-size: 14.5px;
    line-height: 1.7;
  }
}

/* Public /guide — layout rộng hơn trang public mặc định (max-w-3xl) */
body.sa-guide-public-page header > div,
body.sa-guide-public-page main {
  max-width: min(1280px, calc(100vw - 2rem));
}

body.sa-guide-public-page main {
  padding-top: 1.5rem;
  padding-bottom: 2.5rem;
}

body.sa-guide-public-page .sa-guide {
  max-width: none;
  width: 100%;
}

body.sa-guide-public-page .sa-guide-prose {
  font-size: 16px;
  line-height: 1.8;
}

@media (min-width: 1100px) {
  body.sa-guide-public-page .sa-guide {
    grid-template-columns: minmax(240px, 280px) minmax(0, 1fr);
    gap: 2.5rem;
  }
}