:root {
  color-scheme: dark;
  --bg: #050505;
  --bg-soft: #0d0d0d;
  --surface: #141414;
  --surface-2: #1c1c1c;
  --text: #f2f2f2;
  --muted: #a3a3a3;
  --border: #2a2a2a;
  --accent: #7dd3fc;
  --accent-2: #67e8f9;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top right, rgba(40, 40, 40, 0.35), transparent 45%),
    radial-gradient(circle at top left, rgba(24, 24, 24, 0.7), transparent 50%),
    var(--bg);
  line-height: 1.6;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.layout {
  display: grid;
  grid-template-columns: 300px minmax(0, 1fr);
  min-height: 100vh;
}

.sidebar {
  padding: 26px 18px;
  border-right: 1px solid var(--border);
  background: rgba(5, 5, 5, 0.95);
  position: sticky;
  top: 0;
  height: 100vh;
  overflow: auto;
}

.brand { margin: 0 0 6px; font-weight: 800; }
.tagline { margin: 0 0 18px; color: var(--muted); font-size: .92rem; }

.nav {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.nav a {
  display: block;
  padding: 9px 11px;
  border-radius: 10px;
  border: 1px solid transparent;
  color: #eaeaea;
}

.nav a:hover,
.nav a.active {
  text-decoration: none;
  border-color: #3a3a3a;
  background: linear-gradient(90deg, #161616 0%, #202020 100%);
}

.content {
  max-width: 1150px;
  width: 100%;
  padding: 32px;
}

h1, h2, h3 { line-height: 1.2; }
h1 { margin: 0 0 12px; font-size: 2rem; }
h2 {
  margin: 32px 0 10px;
  border-bottom: 1px solid var(--border);
  padding-bottom: 8px;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 14px;
}

.card {
  background: linear-gradient(180deg, #131313 0%, #191919 100%);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 16px;
}

.badge {
  display: inline-block;
  font-size: .8rem;
  border-radius: 999px;
  padding: 4px 10px;
  border: 1px solid #2d2d2d;
  color: #d4d4d4;
  background: #111;
}

.note {
  border-left: 3px solid var(--accent-2);
  background: #111;
  border-radius: 8px;
  padding: 10px 12px;
}

table {
  width: 100%;
  border-collapse: collapse;
  background: rgba(18, 18, 18, 0.9);
}

th, td {
  border: 1px solid var(--border);
  text-align: left;
  vertical-align: top;
  padding: 10px;
}

pre, code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

code {
  border: 1px solid #363636;
  background: #111;
  border-radius: 6px;
  padding: 2px 6px;
}

pre {
  overflow-x: auto;
  border: 1px solid #303030;
  background: #0d0d0d;
  border-radius: 10px;
  padding: 12px;
}

@media (max-width: 920px) {
  .layout { grid-template-columns: 1fr; }
  .sidebar {
    position: static;
    height: auto;
    border-right: none;
    border-bottom: 1px solid var(--border);
  }
}