:root,
[data-theme="light"] {
  --font-body: 'Inter', system-ui, sans-serif;
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: clamp(1.5rem, 1.2rem + 1vw, 2rem);
  --text-2xl: clamp(2rem, 1.5rem + 2vw, 2.75rem);
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --radius-sm: 0.5rem;
  --radius-md: 0.875rem;
  --radius-lg: 1.25rem;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow-md: 0 12px 30px rgba(15, 23, 42, 0.08);
  --color-bg: #f7f7f5;
  --color-surface: #ffffff;
  --color-surface-2: #f2f2ef;
  --color-border: #e4e4e0;
  --color-divider: #ecece7;
  --color-text: #191919;
  --color-text-muted: #5f5f58;
  --color-text-faint: #8d8d86;
  --color-primary: #2f6fed;
  --color-primary-soft: #eef4ff;
  --color-primary-strong: #1f58c7;
  --color-success: #0f8b6d;
}

[data-theme="dark"] {
  --color-bg: #111315;
  --color-surface: #181b1f;
  --color-surface-2: #20242a;
  --color-border: #2a2f36;
  --color-divider: #2d323a;
  --color-text: #f2f4f7;
  --color-text-muted: #bcc2cb;
  --color-text-faint: #8d96a3;
  --color-primary: #7ca6ff;
  --color-primary-soft: #1a2740;
  --color-primary-strong: #a7c2ff;
  --color-success: #47c7a8;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.25);
  --shadow-md: 0 18px 40px rgba(0, 0, 0, 0.32);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.65;
  color: var(--color-text);
  background: var(--color-bg);
}
a { color: var(--color-primary); text-decoration: none; }
a:hover { text-decoration: underline; }
img, svg { max-width: 100%; height: auto; }
button, input { font: inherit; }
.skip-link {
  position: absolute;
  left: -999px;
  top: var(--space-4);
  z-index: 999;
  background: var(--color-primary);
  color: #fff;
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-sm);
}
.skip-link:focus { left: var(--space-4); }
.layout-shell {
  display: grid;
  grid-template-columns: 320px minmax(0, 1fr);
  min-height: 100vh;
}
.sidebar {
  position: sticky;
  top: 0;
  align-self: start;
  height: 100vh;
  overflow-y: auto;
  padding: var(--space-6);
  border-right: 1px solid var(--color-border);
  background: color-mix(in srgb, var(--color-surface) 92%, var(--color-bg));
}
.brand-card,
.search-panel,
.sidebar-panel,
.wiki-nav,
.meta-card,
.article-card,
.topbar,
.site-footer {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}
.brand-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding: var(--space-4);
  margin-bottom: var(--space-4);
}
.brand {
  display: flex;
  gap: var(--space-3);
  align-items: center;
  color: var(--color-text);
}
.brand:hover { text-decoration: none; }
.brand strong { display: block; font-size: 1rem; }
.brand small { color: var(--color-text-muted); font-size: var(--text-sm); }
.brand-mark {
  width: 2.75rem;
  height: 2.75rem;
  border-radius: 0.9rem;
  display: grid;
  place-items: center;
  color: var(--color-primary);
  background: var(--color-primary-soft);
  flex: 0 0 auto;
}
.theme-toggle {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  border: 1px solid var(--color-border);
  background: var(--color-surface-2);
  color: var(--color-text);
  border-radius: 999px;
  padding: .45rem .65rem;
  cursor: pointer;
}
.theme-icon-light { display: none; }
[data-theme="dark"] .theme-icon-light { display: inline; }
[data-theme="dark"] .theme-icon-dark { display: none; }
.search-panel,
.sidebar-panel,
.wiki-nav { padding: var(--space-4); margin-bottom: var(--space-4); }
.search-panel h2,
.sidebar-panel h2,
.wiki-nav h2,
.meta-card h2 {
  margin: 0 0 var(--space-3);
  font-size: var(--text-sm);
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--color-text-faint);
}
.search-box input[type="text"],
.search-box input[type="search"],
input[type="text"],
input[type="search"] {
  width: 100%;
  padding: .8rem .95rem;
  border-radius: .9rem;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text);
}
.wiki-nav ul { list-style: none; margin: 0; padding: 0; }
.wiki-nav li + li { margin-top: .25rem; }
.wiki-nav a {
  display: block;
  padding: .55rem .7rem;
  border-radius: .7rem;
  color: var(--color-text-muted);
}
.wiki-nav a:hover,
.wiki-nav .active a,
.wiki-nav li.active a {
  background: var(--color-primary-soft);
  color: var(--color-primary-strong);
  text-decoration: none;
}
.panel-content,
.meta-card ul { color: var(--color-text-muted); }
.main-shell {
  padding: var(--space-6);
}
.topbar {
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: var(--space-4);
  padding: var(--space-5) var(--space-6);
  margin-bottom: var(--space-6);
}
.eyebrow {
  margin: 0 0 .35rem;
  color: var(--color-text-faint);
  text-transform: uppercase;
  letter-spacing: .08em;
  font-size: var(--text-xs);
}
.topbar h1 {
  margin: 0;
  font-size: var(--text-xl);
  line-height: 1.2;
}
.ghost-link {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  padding: .7rem .95rem;
  border-radius: .8rem;
  border: 1px solid var(--color-border);
  background: var(--color-surface-2);
  color: var(--color-text);
}
.ghost-link:hover { text-decoration: none; background: var(--color-primary-soft); }
.content-grid {
  display: grid;
  grid-template-columns: minmax(0, 780px) 280px;
  gap: var(--space-6);
  align-items: start;
}
.article-card { padding: clamp(1.25rem, 2vw, 2rem); }
.article-body { max-width: 68ch; }
.article-body h1,
.article-body h2,
.article-body h3,
.article-body h4 {
  line-height: 1.25;
  margin-top: 1.75em;
  margin-bottom: .65em;
  color: var(--color-text);
}
.article-body h1 { font-size: 2rem; }
.article-body h2 { font-size: 1.5rem; }
.article-body h3 { font-size: 1.2rem; }
.article-body p,
.article-body ul,
.article-body ol,
.article-body blockquote,
.article-body table { margin: 0 0 1rem; }
.article-body ul,
.article-body ol { padding-left: 1.2rem; }
.article-body code {
  padding: .15rem .35rem;
  border-radius: .35rem;
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  font-size: .92em;
}
.article-body pre {
  overflow: auto;
  padding: 1rem;
  border-radius: 1rem;
  background: #111827;
  color: #f8fafc;
}
.article-body blockquote {
  padding: .9rem 1rem;
  border-left: 3px solid var(--color-primary);
  background: var(--color-primary-soft);
  border-radius: 0 .8rem .8rem 0;
}
.hero-intro {
  margin-bottom: var(--space-6);
  padding: var(--space-5);
  background: linear-gradient(180deg, var(--color-primary-soft), transparent);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  padding: .35rem .7rem;
  font-size: var(--text-xs);
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--color-primary-strong);
}
.hero-intro h2 { margin: .8rem 0; font-size: var(--text-2xl); line-height: 1.1; }
.hero-intro p { margin: 0; max-width: 56ch; color: var(--color-text-muted); }
.home-panels {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}
.info-panel {
  padding: var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface-2);
}
.info-panel h3 { margin: 0 0 .5rem; font-size: 1rem; }
.info-panel p { margin: 0; color: var(--color-text-muted); }
.meta-column {
  display: grid;
  gap: var(--space-4);
  position: sticky;
  top: var(--space-6);
}
.meta-card { padding: var(--space-4); }
.meta-card ul { margin: 0; padding-left: 1rem; }
.toc-nav a {
  display: block;
  padding: .35rem 0;
  color: var(--color-text-muted);
}
.toc-nav a:hover { color: var(--color-primary); text-decoration: none; }
.toc-empty { margin: 0; color: var(--color-text-faint); font-size: var(--text-sm); }
.site-footer {
  display: flex;
  justify-content: space-between;
  gap: var(--space-4);
  align-items: center;
  margin-top: var(--space-6);
  padding: var(--space-4) var(--space-5);
  color: var(--color-text-muted);
}
.footer-copy {
  display: flex;
  flex-direction: column;
  gap: .15rem;
}
.wcms-content table th,
.wcms-content table td {
  border: 1px solid var(--color-border);
  padding: .65rem .8rem;
}
.wcms-content table th { background: var(--color-surface-2); }
@media (max-width: 1100px) {
  .content-grid { grid-template-columns: 1fr; }
  .meta-column { position: static; }
}
@media (max-width: 960px) {
  .layout-shell { grid-template-columns: 1fr; }
  .sidebar {
    position: static;
    height: auto;
    border-right: 0;
    border-bottom: 1px solid var(--color-border);
  }
}
@media (max-width: 720px) {
  .main-shell,
  .sidebar { padding: var(--space-4); }
  .topbar,
  .site-footer { padding: var(--space-4); }
  .topbar,
  .site-footer { flex-direction: column; align-items: start; }
  .home-panels { grid-template-columns: 1fr; }
}