:root {
  --bg: #0a0a0a;
  --surface: #121212;
  --surface-2: #181818;
  --text: #e7e7e7;
  --text-2: #b8b8b8;
  --muted: #777;
  --border: #292929;
  --accent: #e63232;
  --accent-light: #ff6262;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.7 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}
a { color: var(--accent-light); text-decoration: none; }
a:hover { text-decoration: underline; }

.site-header {
  border-bottom: 1px solid var(--border);
  background: rgba(10, 10, 10, .96);
}
.site-nav {
  width: min(1120px, calc(100% - 2.5rem));
  min-height: 68px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.brand {
  color: var(--accent);
  font: 800 1.35rem/1 ui-monospace, SFMono-Regular, Menlo, monospace;
  text-decoration: none;
}
.nav-links { display: flex; align-items: center; gap: 1.35rem; }
.nav-links a { color: var(--text-2); font-size: .92rem; }
.nav-links a.active { color: var(--text); }
.nav-links .dashboard-link {
  padding: .42rem .8rem;
  border: 1px solid var(--accent);
  border-radius: 999px;
  color: var(--accent-light);
}

.page-shell {
  width: min(1120px, calc(100% - 2.5rem));
  margin: 0 auto;
  padding: 1.5rem 0 4rem;
}
.docs-layout {
  display: grid;
  grid-template-columns: 220px minmax(0, 820px);
  justify-content: space-between;
  gap: 3rem;
}
.article-column { min-width: 0; }
.docs-sidebar nav {
  position: sticky;
  top: 1.5rem;
}
.docs-nav-section { margin-bottom: 1.45rem; }
.docs-nav-label {
  margin-bottom: .42rem;
  color: var(--muted);
  font-size: .74rem;
  font-weight: 700;
  letter-spacing: .09em;
  text-transform: uppercase;
}
.docs-nav-section a {
  display: block;
  padding: .3rem .55rem;
  border-left: 2px solid transparent;
  color: var(--text-2);
  font-size: .88rem;
  line-height: 1.45;
}
.docs-nav-section a:hover { color: var(--text); text-decoration: none; }
.docs-nav-section a.active {
  border-left-color: var(--accent);
  color: var(--text);
  background: linear-gradient(90deg, rgba(230, 50, 50, .1), transparent);
}
.docs-mobile-menu { display: none; }
.breadcrumbs {
  display: flex;
  gap: .5rem;
  flex-wrap: wrap;
  margin-bottom: 2rem;
  color: var(--muted);
  font-size: .85rem;
}
.breadcrumbs a { color: var(--muted); }
.article-header { padding-bottom: 1.5rem; border-bottom: 1px solid var(--border); }
.eyebrow {
  margin: 0 0 .35rem;
  color: var(--accent-light);
  font-size: .82rem;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
}
h1, h2, h3 { line-height: 1.25; letter-spacing: -.015em; }
h1 { margin: .25rem 0 .65rem; font-size: clamp(2rem, 6vw, 3.15rem); }
h2 { margin: 2.4rem 0 .65rem; font-size: 1.45rem; }
h3 { margin: 1.7rem 0 .45rem; font-size: 1.08rem; }
.lede { margin: 0; color: var(--text-2); font-size: 1.12rem; }
.article-meta { margin: 1rem 0 0; color: var(--muted); font-size: .85rem; }
.article-body { padding-top: 1rem; }
.article-body { overflow-wrap: anywhere; }
.article-body p, .article-body li { color: var(--text-2); }
.article-body strong { color: var(--text); }
.article-body ul, .article-body ol { padding-left: 1.4rem; }
.article-body li { margin: .35rem 0; }
.article-body blockquote {
  margin: 1.4rem 0;
  padding: .75rem 0 .75rem 1rem;
  border-left: 3px solid var(--accent);
  color: var(--text);
  font-size: 1.05rem;
}
.article-body blockquote p { margin: 0; color: var(--text); }
code {
  border-radius: 4px;
  background: var(--surface-2);
  color: var(--text);
  padding: .12em .34em;
  font-size: .9em;
}
pre {
  overflow-x: auto;
  padding: 1rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
}
pre code { padding: 0; background: transparent; }
table { width: 100%; border-collapse: collapse; margin: 1rem 0; }
th, td { padding: .65rem .75rem; border-bottom: 1px solid var(--border); text-align: left; vertical-align: top; }
th { color: var(--text); }
td { color: var(--text-2); }
.link-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem 1.5rem;
  margin: 1.25rem 0 2rem;
}
.link-card {
  display: block;
  padding: 1rem 0;
  border-bottom: 1px solid var(--border);
}
.link-card strong { display: block; margin-bottom: .25rem; color: var(--text); }
.link-card span { display: block; color: var(--muted); }
.callout {
  margin: 1.4rem 0;
  padding: 1rem;
  border-left: 3px solid var(--accent);
  background: var(--surface);
  color: var(--text-2);
}
.reef-diagram, .reef-figure img, .reef-video {
  display: block;
  max-width: 100%;
  height: auto;
  margin: 1.5rem auto;
  border: 1px solid var(--border);
  border-radius: 12px;
}
.reef-figure { margin: 1.6rem 0; }
.reef-figure img { margin-bottom: .4rem; }
.reef-figure figcaption { color: var(--muted); text-align: center; font-size: .85rem; }
.article-body img { max-width: 100%; height: auto; }
.benchmark-source,
.source-note { font-size: .9rem; }
.site-footer {
  width: min(1120px, calc(100% - 2.5rem));
  margin: 0 auto;
  padding: 1.5rem 0 2.5rem;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  color: var(--muted);
  font-size: .86rem;
}
.site-footer nav { display: flex; gap: 1rem; flex-wrap: wrap; }
.site-footer a { color: var(--muted); }
#back-to-top {
  position: fixed;
  right: calc(1.25rem + env(safe-area-inset-right));
  bottom: calc(1.25rem + env(safe-area-inset-bottom));
  z-index: 50;
  width: 42px;
  height: 42px;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(230, 50, 50, .3);
  border-radius: 50%;
  background: rgba(230, 50, 50, .15);
  color: var(--accent);
  font: inherit;
  font-size: 1.2rem;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translateY(4px);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: opacity .2s, transform .2s, background .2s, visibility .2s;
}
#back-to-top.visible {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateY(0);
}
#back-to-top:hover { background: rgba(230, 50, 50, .3); }
#back-to-top:focus-visible {
  outline: 2px solid var(--accent-light);
  outline-offset: 3px;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  #back-to-top { transition: none; }
}

@media (max-width: 680px) {
  .site-nav { align-items: flex-start; padding: 1rem 0; }
  .nav-links { justify-content: flex-end; gap: .7rem 1rem; flex-wrap: wrap; }
  .nav-links a { font-size: .84rem; }
  .link-grid { grid-template-columns: 1fr; }
  .site-footer { flex-direction: column; }
}

@media (max-width: 860px) {
  .docs-layout { display: block; }
  .docs-sidebar { display: none; }
  .docs-mobile-menu {
    display: block;
    margin-bottom: 1.5rem;
    padding: .7rem .85rem;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--surface);
  }
  .docs-mobile-menu summary { color: var(--text); cursor: pointer; font-weight: 650; }
  .docs-mobile-menu nav { padding-top: 1rem; }
  .docs-mobile-menu .docs-nav-section:last-child { margin-bottom: .2rem; }
}

@media (max-width: 560px) {
  .article-body table {
    display: block;
    overflow-x: auto;
    white-space: nowrap;
  }
}