/*
 * VibeDocs — Category (Section) Hub Styles
 * Scoped under .vbd-category-page. Tokens mirror the hub and article CSS.
 */

/* ─── Tokens ─── */
.vbd-category-page {
  --vbd-bg-elev:      #ffffff;
  --vbd-ink:          #1a1a1a;
  --vbd-ink-soft:     #4a4a4a;
  --vbd-ink-muted:    #7a7a7a;
  --vbd-rule:         #e8e3d8;
  --vbd-rule-strong:  #d4cdba;

  background: var(--vbd-bg);
  color: var(--vbd-ink);
  background-image: radial-gradient(circle at 1px 1px, rgba(0,0,0,0.025) 1px, transparent 0);
  background-size: 24px 24px;
  min-height: 60vh;
}

/* ─── Shorthand aliases ─── */
.vbd-category-page {
  --bg:          var(--vbd-bg);
  --bg-elev:     var(--vbd-bg-elev);
  --ink:         var(--vbd-ink);
  --ink-soft:    var(--vbd-ink-soft);
  --ink-muted:   var(--vbd-ink-muted);
  --rule:        var(--vbd-rule);
  --rule-strong: var(--vbd-rule-strong);
  --accent:      var(--vbd-accent);
  --accent-soft: var(--vbd-accent-soft);
  --accent-ink:  var(--vbd-accent-ink);
  --sage:        var(--vbd-sage);
  --sage-soft:   var(--vbd-sage-soft);
}

/* ─── Accessibility utility ─── */
.vbd-category-page .sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ─── Entrance animation ─── */
.vbd-category-page .vbd-fade-in {
  opacity: 0;
  transform: translateY(8px);
  animation: vbd-cat-fadeUp 0.5s ease forwards;
}
.vbd-category-page .vbd-delay-1 { animation-delay: 0.05s; }
.vbd-category-page .vbd-delay-2 { animation-delay: 0.12s; }
.vbd-category-page .vbd-delay-3 { animation-delay: 0.18s; }

@keyframes vbd-cat-fadeUp {
  to { opacity: 1; transform: translateY(0); }
}

/* ─── Breadcrumbs ─── */
.vbd-category-page .vbd-crumbs {
  max-width: var(--vibedocs-container-width, 1400px);
  margin: 0 auto;
  padding: 24px 32px 0;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--ink-muted);
  flex-wrap: wrap;
  list-style: none;
}

.vbd-category-page .vbd-crumbs a {
  color: var(--ink-muted);
  text-decoration: none;
  transition: color 0.15s;
}
.vbd-category-page .vbd-crumbs a:hover { color: var(--accent); }
.vbd-category-page .vbd-crumbs .sep   { opacity: 0.5; }
.vbd-category-page .vbd-crumbs .current {
  color: var(--ink);
  font-weight: 500;
}

/* ─── Shell ─── */
.vbd-category-page .vbd-shell {
  max-width: var(--vibedocs-container-width, 1400px);
  margin: 0 auto;
  padding: 48px 32px 96px;
}

/* ─── Two-column layout ─── */
.vbd-category-page .category-layout {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 64px;
  align-items: start;
}

/* ─── Left section nav ─── */
.vbd-category-page .category-nav {
  position: sticky;
  top: calc(var(--vd-theme-header-height, 0px) + var(--vd-sticky-offset, 24px));
  max-height: calc(100vh - var(--vd-theme-header-height, 0px) - var(--vd-sticky-offset, 24px) - 24px);
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--rule-strong) transparent;
  padding-right: 20px;
  border-right: 1px solid var(--rule);
}

.vbd-category-page .category-nav-label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--ink-muted);
  margin-bottom: 12px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--rule);
  font-family: ui-monospace, 'SFMono-Regular', monospace;
}

.vbd-category-page .category-nav ul { list-style: none; margin: 0; padding: 0; }
.vbd-category-page .category-nav > ul > li { margin-bottom: 2px; }

.vbd-category-page .category-nav a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 12px;
  font-size: 14px;
  color: var(--ink-soft);
  text-decoration: none;
  border-radius: 6px;
  transition: background 0.15s, color 0.15s;
}
.vbd-category-page .category-nav a:hover {
  background: var(--bg-elev);
  color: var(--ink);
}
.vbd-category-page .category-nav a.active {
  background: var(--accent-soft);
  color: var(--accent);
  font-weight: 500;
}

.vbd-category-page .category-nav .cat-count {
  font-size: 10px;
  font-family: ui-monospace, 'SFMono-Regular', monospace;
  color: var(--ink-muted);
  opacity: 0.7;
}
.vbd-category-page .category-nav a.active .cat-count {
  color: var(--accent);
  opacity: 1;
}

/* ─── Main header ─── */
.vbd-category-page .category-main-header {
  margin-bottom: 40px;
}

.vbd-category-page .vbd-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--accent);
  background: var(--accent-soft);
  padding: 6px 12px;
  border-radius: 100px;
  margin-bottom: 20px;
  font-family: ui-monospace, 'SFMono-Regular', monospace;
}
.vbd-category-page .vbd-eyebrow::before {
  content: '';
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--accent);
  flex-shrink: 0;
}

.vbd-category-page .category-main-header h1 {
  font-size: clamp(32px, 4.5vw, 44px);
  font-weight: 500;
  letter-spacing: -0.02em;
  color: var(--ink);
  line-height: 1.1;
  margin-bottom: 12px;
}
.vbd-category-page .category-main-header h1 em {
  font-style: italic;
  color: var(--accent);
  font-weight: 400;
}

.vbd-category-page .page-subtitle {
  font-size: 18px;
  line-height: 1.55;
  color: var(--ink-soft);
  max-width: 680px;
  margin-bottom: 20px;
}

.vbd-category-page .category-main-meta {
  display: flex;
  gap: 20px;
  align-items: center;
  padding: 16px 20px;
  background: var(--bg-elev);
  border: 1px solid var(--rule);
  border-radius: 10px;
  font-size: 13px;
  color: var(--ink-muted);
  flex-wrap: wrap;
}
.vbd-category-page .category-main-meta strong { color: var(--ink); }
.vbd-category-page .category-main-meta .divider {
  width: 1px; height: 16px;
  background: var(--rule);
  flex-shrink: 0;
}

/* ─── View controls ─── */
.vbd-category-page .view-controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
  gap: 12px;
}

.vbd-category-page .view-sort {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  color: var(--ink-muted);
}
.vbd-category-page .view-sort label {
  cursor: default;
  white-space: nowrap;
}
.vbd-category-page .view-sort select {
  font-size: 13px;
  padding: 6px 10px;
  background: var(--bg-elev);
  border: 1px solid var(--rule);
  border-radius: 6px;
  color: var(--ink);
  cursor: pointer;
  outline: none;
  transition: border-color 0.15s;
}
.vbd-category-page .view-sort select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.vbd-category-page .view-toggle {
  display: flex;
  gap: 2px;
  background: var(--bg-elev);
  border: 1px solid var(--rule);
  border-radius: 8px;
  padding: 3px;
  flex-shrink: 0;
}
.vbd-category-page .view-toggle button {
  background: transparent;
  border: none;
  padding: 6px 10px;
  border-radius: 5px;
  cursor: pointer;
  color: var(--ink-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.15s, color 0.15s;
}
.vbd-category-page .view-toggle button svg {
  width: 15px; height: 15px;
  display: block;
}
.vbd-category-page .view-toggle button.active {
  background: var(--ink);
  color: var(--bg);
}
.vbd-category-page .view-toggle button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

/* ─── Article cards — list view (default) ─── */
.vbd-category-page .article-cards {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 64px;
  transition: opacity 0.15s;
}

.vbd-category-page .article-card {
  display: grid;
  grid-template-columns: 40px 1fr auto;
  gap: 20px;
  align-items: flex-start;
  padding: 20px 24px;
  background: var(--bg-elev);
  border: 1px solid var(--rule);
  border-radius: 12px;
  text-decoration: none;
  transition: transform 0.2s, border-color 0.2s, box-shadow 0.2s;
  position: relative;
  overflow: hidden;
  color: var(--ink);
}
.vbd-category-page .article-card::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0; width: 3px;
  background: var(--accent);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform 0.25s ease;
}
.vbd-category-page .article-card:hover {
  transform: translateY(-1px);
  border-color: var(--rule-strong);
  box-shadow: 0 8px 24px -8px rgba(0, 0, 0, 0.08);
}
.vbd-category-page .article-card:hover::before { transform: scaleY(1); }
.vbd-category-page .article-card:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.vbd-category-page .article-card-num {
  font-size: 22px;
  font-weight: 500;
  color: var(--ink-muted);
  line-height: 1;
  padding-top: 2px;
  transition: color 0.15s;
}
.vbd-category-page .article-card:hover .article-card-num { color: var(--accent); }

.vbd-category-page .article-card-body h3 {
  font-size: 19px;
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--ink);
  margin-bottom: 6px;
  line-height: 1.3;
  transition: color 0.15s;
}
.vbd-category-page .article-card:hover .article-card-body h3 { color: var(--accent); }

.vbd-category-page .article-card-body p {
  font-size: 14px;
  color: var(--ink-muted);
  line-height: 1.5;
  margin: 0;
}

.vbd-category-page .article-card-meta {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 8px;
  font-size: 11px;
  color: var(--ink-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding-top: 4px;
  font-family: ui-monospace, 'SFMono-Regular', monospace;
  white-space: nowrap;
}
.vbd-category-page .article-card-meta .pill {
  padding: 3px 8px;
  background: var(--bg);
  border: 1px solid var(--rule);
  border-radius: 100px;
}

/* ─── Article badges ─── */
.vbd-category-page .article-badge {
  display: inline-flex;
  align-items: center;
  margin-left: 8px;
  padding: 2px 7px;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  border-radius: 4px;
  font-weight: 500;
  vertical-align: middle;
  font-family: ui-monospace, 'SFMono-Regular', monospace;
}
.vbd-category-page .article-badge.new     { background: var(--accent-soft); color: var(--accent); }
.vbd-category-page .article-badge.updated { background: var(--sage-soft);   color: var(--sage);   }

/* ─── Grid view ─── */
.vbd-category-page .article-cards[data-view="grid"] {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 14px;
}
.vbd-category-page .article-cards[data-view="grid"] .article-card {
  grid-template-columns: 40px 1fr;
  grid-template-rows: auto auto;
}
.vbd-category-page .article-cards[data-view="grid"] .article-card-meta {
  grid-column: 1 / -1;
  flex-direction: row;
  justify-content: flex-start;
  align-items: center;
  padding-top: 12px;
  border-top: 1px solid var(--rule);
  gap: 12px;
}

@media (min-width: 1400px) {
  .vbd-category-page .article-cards[data-view="grid"] {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* ─── Responsive: 1100px ─── */
@media (max-width: 1100px) {
  .vbd-category-page .category-layout {
    grid-template-columns: 220px 1fr;
    gap: 40px;
  }
}

/* ─── Responsive: 900px ─── */
@media (max-width: 900px) {
  .vbd-category-page .category-layout {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .vbd-category-page .category-nav {
    position: static;
    border-right: none;
    padding-right: 0;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--rule);
  }
  .vbd-category-page .article-cards[data-view="grid"] {
    grid-template-columns: 1fr;
  }
}

/* ─── Responsive: 640px ─── */
@media (max-width: 640px) {
  .vbd-category-page .vbd-crumbs { padding: 16px 20px 0; }
  .vbd-category-page .vbd-shell  { padding: 32px 20px 64px; }

  .vbd-category-page .article-card {
    grid-template-columns: 32px 1fr;
    gap: 14px;
  }
  .vbd-category-page .article-card-meta {
    grid-column: 1 / -1;
    flex-direction: row;
    justify-content: flex-start;
    align-items: center;
    gap: 10px;
    padding-top: 10px;
    border-top: 1px solid var(--rule);
  }

  .vbd-category-page .view-controls {
    flex-wrap: wrap;
    gap: 8px;
  }
  .vbd-category-page .view-sort {
    flex: 1;
    min-width: 0;
  }
  .vbd-category-page .view-sort select {
    flex: 1;
    min-width: 0;
  }
}

/* ─── Pagination ────────────────────────────────────────────── */
.vbd-category-page .vbd-pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  margin-top: 36px;
  flex-wrap: wrap;
}

.vbd-category-page .vbd-page-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 36px;
  height: 36px;
  padding: 0 10px;
  border: 1px solid var(--vbd-rule-strong, #d4cdba);
  border-radius: 8px;
  background: var(--vbd-bg-elev, #ffffff);
  color: var(--vbd-ink-soft, #6b5d47);
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
}

.vbd-category-page .vbd-page-btn:hover {
  border-color: var(--vbd-accent, #c2410c);
  color: var(--vbd-accent, #c2410c);
  background: var(--vbd-accent-soft, #fef2ea);
}

.vbd-category-page .vbd-page-btn.is-current {
  background: var(--vbd-accent, #c2410c);
  border-color: var(--vbd-accent, #c2410c);
  color: #fff;
  cursor: default;
  pointer-events: none;
}

.vbd-category-page .vbd-page-btn.is-disabled {
  opacity: 0.35;
  cursor: not-allowed;
  pointer-events: none;
}