:root {
  /* ── Modern SaaS (light) ── */
  --bg-color: #f7f8fa;
  --surface-color: #ffffff;
  --surface-subtle: #f2f4f7;
  --text-primary: #0f1115;
  --text-secondary: #5b6370;
  --text-tertiary: #8a919e;
  --border-color: #e6e8ec;
  --border-strong: #d5d9e0;
  --accent-color: #007aff;
  --accent-hover: #0a6ae6;
  --accent-soft: rgba(0, 122, 255, 0.08);

  /* Gemini brand gradient — used sparingly for brand marks & accents */
  --gemini-gradient: linear-gradient(135deg, #4285f4 0%, #9b72cb 52%, #d96570 100%);

  --sidebar-width: 300px;
  --content-max-width: 780px;
  --header-height: 56px;

  /* Tight radii — Modern SaaS */
  --r-sm: 5px;
  --r-md: 6px;
  --r-lg: 8px;
  --r-xl: 10px;

  /* Flat shadows */
  --shadow-sm: 0 1px 2px rgba(15, 17, 21, 0.05);
  --shadow-md: 0 6px 24px rgba(15, 17, 21, 0.10);
  --shadow-lg: 0 12px 40px rgba(15, 17, 21, 0.14);

  --code-bg-inline: #f2f4f7;
  --code-color-inline: #b3204e;
  --code-border-inline: #e3e6ea;

  --code-bg-block: #fafbfc;
  --code-color-block: #0f1115;
  --code-border-block: #e6e8ec;
  --code-head-bg: #f2f4f7;

  --quote-bg: #f7f8fa;
  --quote-color: #414855;
  --quote-border: #e6e8ec;

  --topbar-bg: rgba(255, 255, 255, 0.82);
}

[data-theme='dark'] {
  --bg-color: #0b0d10;
  --surface-color: #14171c;
  --surface-subtle: #1a1e24;
  --text-primary: #eef1f5;
  --text-secondary: #9aa2af;
  --text-tertiary: #6b7280;
  --border-color: #262b33;
  --border-strong: #333944;
  --accent-color: #4c9dff;
  --accent-hover: #6badff;
  --accent-soft: rgba(76, 157, 255, 0.12);

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 6px 24px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.6);

  --code-bg-inline: #1a1e24;
  --code-color-inline: #7fd0ff;
  --code-border-inline: #262b33;

  --code-bg-block: #0f1216;
  --code-color-block: #eef1f5;
  --code-border-block: #262b33;
  --code-head-bg: #171b21;

  --quote-bg: #14171c;
  --quote-color: #c3c9d2;
  --quote-border: #262b33;

  --topbar-bg: rgba(11, 13, 16, 0.82);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, system-ui, 'Segoe UI', Roboto, sans-serif;
  background-color: var(--bg-color);
  color: var(--text-primary);
  line-height: 1.6;
  font-variant-numeric: tabular-nums;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color 0.25s ease, color 0.25s ease;
}

::selection {
  background: var(--accent-soft);
  color: var(--accent-hover);
}

/* Subtle custom scrollbars */
* { scrollbar-width: thin; scrollbar-color: var(--border-strong) transparent; }
*::-webkit-scrollbar { width: 10px; height: 10px; }
*::-webkit-scrollbar-thumb { background: var(--border-strong); border-radius: 20px; border: 3px solid var(--bg-color); }
*::-webkit-scrollbar-track { background: transparent; }

code, pre {
  font-family: 'JetBrains Mono', ui-monospace, 'SFMono-Regular', 'Courier New', monospace;
}

/* ── Typography ── */
h1, h2, h3, h4, h5, h6 {
  color: var(--text-primary);
  font-weight: 650;
  line-height: 1.28;
  letter-spacing: -0.014em;
  margin-top: 2.75rem;
  margin-bottom: 1rem;
  scroll-margin-top: 5rem;
}

h1 {
  font-size: clamp(2.1rem, 4.2vw, 2.8rem);
  font-weight: 780;
  letter-spacing: -0.03em;
  margin-top: 0.5rem;
  line-height: 1.12;
  background: linear-gradient(180deg, var(--text-primary) 60%, var(--text-secondary) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
h2 {
  font-size: 1.62rem;
  padding-bottom: 0.55rem;
  border-bottom: 1px solid var(--border-color);
  scroll-margin-top: 4.5rem;
}
h3 { font-size: 1.28rem; font-weight: 640; }

/* Hover anchor links on headings */
.heading-anchor {
  display: inline-flex;
  align-items: center;
  margin-left: 0.5rem;
  color: var(--text-tertiary);
  opacity: 0;
  transform: translateX(-4px);
  transition: opacity 0.15s ease, transform 0.15s ease, color 0.15s ease;
  vertical-align: middle;
}
h2:hover .heading-anchor, h3:hover .heading-anchor { opacity: 1; transform: none; }
.heading-anchor:hover { color: var(--accent-color); }

p {
  margin-bottom: 1.2rem;
  font-size: 1.03rem;
  color: var(--text-secondary);
  line-height: 1.78;
}

/* Lead paragraph (intro under H1) */
.markdown-body > p:first-of-type {
  font-size: 1.2rem;
  line-height: 1.65;
  color: var(--text-secondary);
  font-weight: 430;
  padding-bottom: 1.5rem;
  margin-bottom: 1.75rem;
  border-bottom: 1px solid var(--border-color);
}

.markdown-body strong { color: var(--text-primary); font-weight: 640; }

.markdown-body hr {
  border: none;
  border-top: 1px solid var(--border-color);
  margin: 2.75rem 0;
}

a {
  color: var(--accent-color);
  text-decoration: none;
  transition: color 0.15s ease;
}
a:hover {
  color: var(--accent-hover);
  text-decoration: underline;
  text-underline-offset: 3px;
}

ul, ol { margin: 0 0 1.2rem 1.35rem; }
li { margin-bottom: 0.5rem; color: var(--text-secondary); line-height: 1.7; }
li::marker { color: var(--text-tertiary); }

/* ── Layout ── */
.app-container {
  display: flex;
  min-height: 100vh;
}

/* ── Reading progress bar ── */
.reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  background: var(--gemini-gradient);
  z-index: 200;
  transition: width 0.08s linear;
  border-radius: 0 2px 2px 0;
}

/* ── Sidebar ── */
.sidebar {
  width: var(--sidebar-width);
  height: 100vh;
  position: sticky;
  top: 0;
  background-color: var(--bg-color);
  border-right: 1px solid var(--border-color);
  overflow-y: auto;
  padding: 1.5rem 1.1rem;
  transition: transform 0.3s ease, background-color 0.25s ease;
  z-index: 60;
  display: flex;
  flex-direction: column;
}

.sidebar-header {
  margin-bottom: 1rem;
  padding-bottom: 1.1rem;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.5rem;
}

.sidebar-brand {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  min-width: 0;
}
.brand-mark {
  width: 30px;
  height: 30px;
  border-radius: var(--r-md);
  background: var(--gemini-gradient);
  flex-shrink: 0;
  box-shadow: 0 2px 8px rgba(66, 133, 244, 0.35);
}
.brand-text { display: flex; flex-direction: column; min-width: 0; }
.brand-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.01em;
  line-height: 1.2;
}
.brand-sub {
  font-size: 0.72rem;
  color: var(--text-tertiary);
  font-weight: 500;
  letter-spacing: 0.01em;
}

.sidebar-meta {
  display: flex;
  gap: 0.4rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}
.meta-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.74rem;
  font-weight: 550;
  color: var(--text-secondary);
  background: var(--surface-subtle);
  border: 1px solid var(--border-color);
  border-radius: var(--r-sm);
  padding: 0.22rem 0.5rem;
}
.meta-chip.subtle { background: transparent; border-color: transparent; color: var(--text-tertiary); }

.toc-nav { flex: 1; }
.toc-list { list-style: none; }
.toc-item { margin-bottom: 1px; }

.toc-link {
  display: block;
  padding: 0.44rem 0.7rem;
  color: var(--text-secondary);
  font-size: 0.89rem;
  border-radius: var(--r-md);
  border-left: 2px solid transparent;
  transition: background-color 0.15s ease, color 0.15s ease, border-color 0.15s ease;
  text-decoration: none;
  line-height: 1.45;
}

.toc-link:hover {
  background-color: var(--surface-subtle);
  color: var(--text-primary);
  text-decoration: none;
}

.toc-link.active {
  background-color: var(--accent-soft);
  color: var(--accent-color);
  font-weight: 600;
  border-left: 2px solid var(--accent-color);
  border-radius: 0 var(--r-md) var(--r-md) 0;
}

.toc-item.depth-2 .toc-link { font-weight: 600; color: var(--text-primary); }
.toc-item.depth-2 { margin-top: 0.35rem; }
.toc-item.depth-3 { padding-left: 0.8rem; }
.toc-item.depth-3 .toc-link {
  font-size: 0.82rem;
  padding: 0.3rem 0.7rem;
  color: var(--text-tertiary);
  font-weight: 500;
}
.toc-item.depth-3 .toc-link:hover { color: var(--text-primary); }
.toc-item.depth-3 .toc-link.active { color: var(--accent-color); }

.sidebar-footer {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border-color);
  font-size: 0.76rem;
  color: var(--text-tertiary);
}
.sidebar-footer strong { color: var(--text-secondary); font-weight: 650; }

.sidebar-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(15, 17, 21, 0.45);
  z-index: 55;
  opacity: 0;
  transition: opacity 0.25s ease;
}

/* ── Main Content ── */
.main-content {
  flex: 1;
  background-color: var(--surface-color);
  min-width: 0;
  border-left: 1px solid var(--border-color);
  position: relative;
}

/* Sticky top bar */
.doc-topbar {
  position: sticky;
  top: 0;
  z-index: 40;
  height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0 3rem;
  background: var(--topbar-bg);
  -webkit-backdrop-filter: saturate(160%) blur(10px);
  backdrop-filter: saturate(160%) blur(10px);
  border-bottom: 1px solid var(--border-color);
}
.crumbs {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.86rem;
  min-width: 0;
}
.crumbs a { color: var(--text-secondary); }
.crumbs a:hover { color: var(--accent-color); text-decoration: none; }
.crumb-sep { color: var(--text-tertiary); }
.crumb-cur {
  color: var(--text-primary);
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.topbar-meta { display: flex; align-items: center; gap: 0.6rem; }

.content-wrapper {
  max-width: var(--content-max-width);
  margin: 0 auto;
  position: relative;
  padding: 3.25rem 3rem 5rem;
}

.markdown-body {
  color: var(--text-primary);
  font-size: 1.03rem;
  animation: fadeUp 0.4s ease both;
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: none; }
}

/* Blockquote — flat, hairline, accent bar */
.markdown-body blockquote {
  border: 1px solid var(--quote-border);
  border-left: 3px solid var(--accent-color);
  padding: 0.9rem 1.1rem;
  margin: 0 0 1.35rem;
  background: var(--quote-bg);
  border-radius: 0 var(--r-lg) var(--r-lg) 0;
  transition: background-color 0.25s ease, border-color 0.25s ease;
}
.markdown-body blockquote,
.markdown-body blockquote * {
  color: var(--quote-color) !important;
}
.markdown-body blockquote p:last-child { margin-bottom: 0; }

/* ── Code blocks (card with header + copy) ── */
.markdown-body .code-card {
  border: 1px solid var(--code-border-block);
  border-radius: var(--r-lg);
  overflow: hidden;
  margin-bottom: 1.6rem;
  background: var(--code-bg-block);
  box-shadow: var(--shadow-sm);
}
.code-card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.4rem 0.6rem 0.4rem 0.9rem;
  background: var(--code-head-bg);
  border-bottom: 1px solid var(--code-border-block);
}
.code-lang {
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--text-tertiary);
}
.code-copy {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.74rem;
  font-weight: 550;
  color: var(--text-secondary);
  background: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: var(--r-sm);
  padding: 0.28rem 0.55rem;
  cursor: pointer;
  transition: color 0.15s ease, border-color 0.15s ease, background 0.15s ease;
}
.code-copy:hover { color: var(--accent-color); border-color: var(--accent-color); background: var(--accent-soft); }
.markdown-body .code-card pre,
.markdown-body .code-card div[class*="language-"] {
  background: transparent !important;
  margin: 0 !important;
  border: none !important;
  border-radius: 0 !important;
}

/* Legacy pre (mermaid / no-language blocks) + fallback */
.markdown-body > pre,
.code-fallback {
  background-color: var(--code-bg-block) !important;
  padding: 1.15rem 1.25rem;
  border-radius: var(--r-lg);
  border: 1px solid var(--code-border-block);
  overflow-x: auto;
  font-size: 0.875rem;
  line-height: 1.6;
  margin-bottom: 1.6rem;
  color: var(--code-color-block) !important;
}

/* Inline code — squared badge */
.markdown-body code:not(pre code):not(.code-card code) {
  background-color: var(--code-bg-inline);
  padding: 0.15em 0.4em;
  border-radius: var(--r-sm);
  font-size: 0.86em;
  color: var(--code-color-inline);
  border: 1px solid var(--code-border-inline);
  transition: background-color 0.25s ease, border-color 0.25s ease, color 0.25s ease;
}

/* Tables — squared, zebra */
.markdown-body table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  margin-bottom: 1.6rem;
  border: 1px solid var(--border-color);
  border-radius: var(--r-lg);
  overflow: hidden;
  font-size: 0.95rem;
  box-shadow: var(--shadow-sm);
}
.markdown-body th,
.markdown-body td {
  border-bottom: 1px solid var(--border-color);
  padding: 0.7rem 1rem;
  text-align: left;
}
.markdown-body th {
  background-color: var(--surface-subtle);
  font-weight: 640;
  color: var(--text-primary);
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}
.markdown-body tbody tr:nth-child(even) { background-color: var(--surface-subtle); }
.markdown-body tbody tr:last-child td { border-bottom: none; }
.markdown-body td { color: var(--text-secondary); }

.markdown-body img {
  max-width: 100%;
  border-radius: var(--r-lg);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-md);
  display: block;
  margin: 0.5rem 0 1.6rem;
}

/* ── Copyright / license footer ── */
.doc-license {
  margin-top: 3.5rem;
  padding-top: 1.75rem;
  border-top: 1px solid var(--border-color);
  font-size: 0.86rem;
  color: var(--text-tertiary);
  line-height: 1.7;
}
.doc-license .license-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-weight: 650;
  color: var(--text-secondary);
  background: var(--surface-subtle);
  border: 1px solid var(--border-color);
  border-radius: var(--r-sm);
  padding: 0.3rem 0.65rem;
  margin-bottom: 0.9rem;
  font-variant-numeric: tabular-nums;
}
.doc-license p { font-size: 0.86rem; color: var(--text-tertiary); margin-bottom: 0.5rem; line-height: 1.7; }
.doc-license strong { color: var(--text-secondary); }

/* ── Theme toggle ── */
.theme-toggle {
  background: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  cursor: pointer;
  padding: 0.4rem;
  border-radius: var(--r-md);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color 0.15s ease, color 0.15s ease, border-color 0.15s ease;
  flex-shrink: 0;
}
.theme-toggle:hover {
  background-color: var(--surface-subtle);
  color: var(--accent-color);
  border-color: var(--border-strong);
}

/* ── Back to top ── */
.back-to-top {
  position: fixed;
  bottom: 22px;
  right: 22px;
  width: 44px;
  height: 44px;
  border-radius: var(--r-xl);
  background: var(--surface-color);
  border: 1px solid var(--border-strong);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: var(--shadow-md);
  opacity: 0;
  transform: translateY(12px);
  pointer-events: none;
  transition: opacity 0.2s ease, transform 0.2s ease, color 0.15s ease, border-color 0.15s ease;
  z-index: 90;
}
.back-to-top.show { opacity: 1; transform: none; pointer-events: auto; }
.back-to-top:hover { color: var(--accent-color); border-color: var(--accent-color); }

/* ── Mobile menu button ── */
.mobile-menu-btn {
  display: none;
  position: fixed;
  bottom: 22px;
  left: 22px;
  background: var(--gemini-gradient);
  border: none;
  border-radius: var(--r-xl);
  width: 52px;
  height: 52px;
  justify-content: center;
  align-items: center;
  box-shadow: var(--shadow-lg);
  z-index: 100;
  cursor: pointer;
  color: #fff;
  transition: transform 0.15s ease;
}
.mobile-menu-btn:active { transform: scale(0.94); }

@media (max-width: 900px) {
  .doc-topbar { padding: 0 1.4rem; }
  .content-wrapper { padding: 2.25rem 1.4rem 5rem; }
}

@media (max-width: 768px) {
  .app-container { flex-direction: column; }
  .sidebar {
    position: fixed;
    transform: translateX(-100%);
    width: 88%;
    max-width: 320px;
  }
  .sidebar.open {
    transform: translateX(0);
    box-shadow: var(--shadow-lg);
  }
  .sidebar-backdrop.show { display: block; opacity: 1; }
  .main-content { border-left: none; }
  .desktop-only { display: none; }
  .doc-topbar { padding: 0 1.2rem 0 4.5rem; }
  .mobile-menu-btn { display: flex; }
  h1 { font-size: 2rem; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
}

/* ── Static hub cards ── */
.hub-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 0.9rem; margin: 1.25rem 0 2rem; }
.hub-card {
  display: flex; flex-direction: column; gap: 0.35rem;
  padding: 1rem 1.15rem; border: 1px solid var(--border-color); border-radius: var(--r-lg);
  background: var(--surface-color); text-decoration: none; transition: border-color .15s ease, box-shadow .15s ease, transform .15s ease;
}
.hub-card:hover { border-color: var(--accent-color); box-shadow: var(--shadow-md); text-decoration: none; transform: translateY(-2px); }
.hub-card-title { font-weight: 650; color: var(--text-primary); font-size: 1rem; line-height: 1.35; }
.hub-card-desc { color: var(--text-secondary); font-size: 0.88rem; line-height: 1.5; }
.theme-toggle { font-size: 1rem; line-height: 1; min-width: 34px; min-height: 32px; }
.back-to-top, .mobile-menu-btn { font-size: 1.3rem; line-height: 1; }
.heading-anchor { text-decoration: none; font-weight: 400; }
/* "อ่านต่อ" related list a touch more prominent */
.markdown-body h2 + ul a { font-weight: 500; }

/* ── Thai text wrapping + mobile overflow safety ── */
.markdown-body { overflow-wrap: break-word; }
.markdown-body p, .markdown-body li, .markdown-body h1, .markdown-body h2, .markdown-body h3, .markdown-body td, .markdown-body th { overflow-wrap: break-word; word-break: break-word; }
.markdown-body pre { max-width: 100%; }
.doc-topbar { overflow: hidden; }
.hub-card-title, .hub-card-desc { overflow-wrap: break-word; word-break: break-word; }

/* ── Hub category nav + sections ── */
.cat-nav { display: flex; flex-wrap: wrap; gap: 0.5rem; margin: 1.25rem 0 0.5rem; }
.cat-chip {
  font-size: 0.85rem; font-weight: 550; color: var(--text-secondary);
  background: var(--surface-subtle); border: 1px solid var(--border-color);
  border-radius: 999px; padding: 0.35rem 0.85rem; text-decoration: none; transition: all .15s ease;
}
.cat-chip:hover { color: var(--accent-color); border-color: var(--accent-color); background: var(--accent-soft); text-decoration: none; }
.hub-section { margin-top: 2.25rem; scroll-margin-top: 4.5rem; }
.hub-section > h2 { margin-top: 0; }
.hub-section-desc { margin: -0.4rem 0 0.4rem; color: var(--text-tertiary); font-size: 0.92rem; }
.hub-grid { margin-top: 0.9rem; }
/* Card decision-support meta (audience / level / reading time) */
.hub-card-who { margin-top: 0.15rem; font-size: 0.8rem; color: var(--text-tertiary); }
.hub-card-who strong { color: var(--text-secondary); font-weight: 600; }
.hub-card-meta { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-top: auto; padding-top: 0.55rem; }
.hub-tag {
  font-size: 0.72rem; font-weight: 550; color: var(--text-tertiary);
  background: var(--surface-subtle); border: 1px solid var(--border-color);
  border-radius: 5px; padding: 0.15rem 0.5rem; font-variant-numeric: tabular-nums;
}

/* ══ Hub landing page — scoped to .hub-page / .hub-wrapper (does not affect article pages) ══ */
.hub-wrapper { max-width: 1120px; padding-top: 2.5rem; }

/* Hero */
.hub-hero { max-width: 760px; margin-bottom: 0.5rem; }
.hub-eyebrow {
  display: inline-flex; align-items: center; gap: 0.45rem;
  font-size: 0.82rem; font-weight: 600; color: var(--accent-color);
  background: var(--accent-soft); border: 1px solid var(--border-color);
  border-radius: 999px; padding: 0.28rem 0.8rem 0.28rem 0.6rem; margin-bottom: 1rem;
}
.hub-eyebrow-mark { width: 14px; height: 14px; border-radius: 4px; background: var(--gemini-gradient); box-shadow: 0 1px 4px rgba(76,157,255,.4); }
.hub-page > .hub-hero h1 {
  font-size: clamp(1.8rem, 4vw, 2.7rem); line-height: 1.18; letter-spacing: -0.02em;
  margin: 0 0 1rem; font-weight: 750;
}
.hub-lead { font-size: 1.06rem; line-height: 1.7; color: var(--text-secondary); margin: 0 0 1.4rem; }
.hub-stats { display: flex; flex-wrap: wrap; gap: 0.6rem 1.5rem; margin: 0 0 1.4rem; }
.hub-stat { font-size: 0.9rem; color: var(--text-tertiary); }
.hub-stat strong { font-size: 1.35rem; font-weight: 750; color: var(--text-primary); margin-right: 0.3rem; font-variant-numeric: tabular-nums; }
.hub-fineprint { font-size: 0.88rem; line-height: 1.6; color: var(--text-tertiary); margin: 0 0 1.1rem; }
.hub-note {
  display: flex; align-items: flex-start; gap: 0.5rem; margin: 0;
  font-size: 0.85rem; line-height: 1.6; color: var(--text-tertiary);
  background: var(--surface-subtle); border: 1px solid var(--border-color);
  border-radius: var(--r-md); padding: 0.6rem 0.85rem;
}
.hub-note-ico { flex: 0 0 15px; width: 15px; height: 15px; margin-top: 0.2rem; color: var(--text-tertiary); }
.hub-note strong { color: var(--text-secondary); font-weight: 600; }

/* Section header with count badge */
.hub-page .hub-section { margin-top: 2.75rem; }
.hub-section-head { display: flex; align-items: baseline; gap: 0.7rem; flex-wrap: wrap; }
.hub-section-head h2 { margin: 0; font-size: 1.32rem; }
.hub-count {
  font-size: 0.74rem; font-weight: 600; color: var(--text-tertiary);
  background: var(--surface-subtle); border: 1px solid var(--border-color);
  border-radius: 5px; padding: 0.12rem 0.5rem; font-variant-numeric: tabular-nums;
}

/* Cards: make full-height flex so meta pins to bottom, add hover arrow affordance */
.hub-page .hub-card { position: relative; height: 100%; padding-right: 1.5rem; }
.hub-page .hub-card:not(.hub-path)::after {
  content: "→"; position: absolute; top: 1rem; right: 1rem;
  color: var(--text-tertiary); font-size: 0.95rem; opacity: 0;
  transform: translateX(-4px); transition: opacity .15s ease, transform .15s ease, color .15s ease;
}
.hub-page .hub-card:not(.hub-path):hover::after { opacity: 1; transform: translateX(0); color: var(--accent-color); }
.hub-page .hub-card-title { font-size: 1.02rem; }

/* Path cards — numbered, accent-tinted */
.hub-paths { grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); }
.hub-path { flex-direction: row !important; align-items: flex-start; gap: 0.85rem !important; }
.hub-path-num {
  flex-shrink: 0; width: 30px; height: 30px; border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.95rem; font-weight: 700; font-variant-numeric: tabular-nums;
  color: #fff; background: var(--gemini-gradient); box-shadow: 0 2px 8px rgba(76,157,255,.35);
}
.hub-path-body { display: flex; flex-direction: column; gap: 0.3rem; min-width: 0; }
.hub-path .hub-card-title { display: inline-flex; align-items: center; gap: 0.4rem; }
.hub-path .hub-card-title::after { content: "→"; color: var(--text-tertiary); transition: transform .15s ease, color .15s ease; }
.hub-path:hover .hub-card-title::after { transform: translateX(3px); color: var(--accent-color); }

/* Category nav chips: give a little breathing room on the hub */
.hub-page .cat-nav { margin: 1.5rem 0 0.25rem; }

@media (max-width: 600px) {
  .hub-wrapper { padding-top: 1.75rem; }
  .hub-page > .hub-hero h1 { font-size: 1.7rem; }
  .hero-br { display: none; }
  .hub-stats { gap: 0.5rem 1.1rem; }
  .hub-stat strong { font-size: 1.2rem; }
}