:root {
  --bg: #08131a;
  --bg-soft: #11212b;
  --panel: rgba(10, 28, 38, 0.84);
  --line: rgba(152, 212, 197, 0.18);
  --line-strong: rgba(152, 212, 197, 0.35);
  --text: #e8f5f0;
  --muted: #9ab7ae;
  --accent: #76e2b3;
  --accent-2: #79b8ff;
  --shadow: 0 30px 80px rgba(0, 0, 0, 0.35);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(121, 184, 255, 0.14), transparent 30%),
    radial-gradient(circle at top right, rgba(118, 226, 179, 0.14), transparent 28%),
    linear-gradient(180deg, #061017 0%, #08131a 60%, #09161d 100%);
  font: 16px/1.65 "IBM Plex Sans", sans-serif;
}
a { color: var(--accent); text-decoration: none; }
a:hover { color: #9cf4ca; }
code, pre { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }
.shell {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 300px minmax(0, 1fr);
}
.sidebar {
  position: sticky;
  top: 0;
  align-self: start;
  height: 100vh;
  padding: 32px 24px;
  border-right: 1px solid var(--line);
  background: rgba(6, 16, 23, 0.72);
  backdrop-filter: blur(14px);
}
.brand {
  display: inline-block;
  margin-bottom: 8px;
  color: #fff;
  font: 700 1.5rem/1.1 "Space Grotesk", sans-serif;
  letter-spacing: 0.02em;
}
.tag {
  margin: 0 0 28px;
  color: var(--muted);
  max-width: 18rem;
}
.nav-list {
  display: grid;
  gap: 10px;
}
.nav-link {
  display: block;
  padding: 10px 12px;
  border: 1px solid transparent;
  border-radius: 14px;
  color: #cfe5de;
}
.nav-link:hover,
.nav-link.active {
  border-color: var(--line-strong);
  background: rgba(118, 226, 179, 0.08);
}
.content {
  padding: 42px min(5vw, 56px) 64px;
}
.hero,
.doc-shell {
  max-width: 1120px;
}
.hero-card,
.doc-card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 28px;
  box-shadow: var(--shadow);
}
.hero-card {
  padding: clamp(24px, 4vw, 44px);
}
.eyebrow {
  display: inline-block;
  margin-bottom: 16px;
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid var(--line-strong);
  color: var(--accent);
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
h1, h2, h3, h4 {
  font-family: "Space Grotesk", sans-serif;
  line-height: 1.15;
  letter-spacing: -0.02em;
}
h1 { font-size: clamp(2.6rem, 5vw, 4.6rem); margin: 0 0 18px; }
h2 { font-size: clamp(1.8rem, 2vw, 2.6rem); margin-top: 42px; }
.lead {
  max-width: 58rem;
  margin: 0 0 24px;
  color: #d6e7e2;
  font-size: 1.08rem;
}
.meta-grid,
.doc-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-top: 28px;
}
.meta-card,
.doc-tile {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.02);
}
.meta-card strong,
.doc-tile strong {
  display: block;
  margin-bottom: 6px;
  color: #fff;
  font-family: "Space Grotesk", sans-serif;
}
.actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 24px;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 18px;
  border-radius: 999px;
  border: 1px solid var(--line-strong);
  color: #fff;
}
.btn.primary {
  background: linear-gradient(135deg, var(--accent), #3eb6c7);
  color: #05202a;
  border-color: transparent;
  font-weight: 700;
}
.section-title {
  margin: 42px 0 14px;
  color: #f2f8f5;
}
.doc-card {
  padding: clamp(22px, 3vw, 36px);
}
.doc-body h1:first-child,
.doc-body h2:first-child {
  margin-top: 0;
}
.doc-body table {
  width: 100%;
  border-collapse: collapse;
  overflow: hidden;
  display: block;
}
.doc-body th,
.doc-body td {
  padding: 10px 12px;
  border: 1px solid var(--line);
  vertical-align: top;
}
.doc-body pre {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 18px;
  overflow-x: auto;
  background: rgba(5, 14, 20, 0.92);
}
.doc-body blockquote {
  margin: 24px 0;
  padding: 14px 18px;
  border-left: 3px solid var(--accent);
  background: rgba(118, 226, 179, 0.07);
}
.doc-body ul, .doc-body ol { padding-left: 22px; }
.doc-body hr {
  border: 0;
  border-top: 1px solid var(--line);
  margin: 32px 0;
}
.footer-note {
  margin-top: 26px;
  color: var(--muted);
}
@media (max-width: 960px) {
  .shell { grid-template-columns: 1fr; }
  .sidebar {
    position: relative;
    height: auto;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }
  .content { padding-top: 28px; }
}