:root {
  --bg: #0b1020;
  --panel: #121933;
  --panel-2: #172042;
  --text: #e8ecf8;
  --muted: #9aa6c7;
  --accent: #69b1ff;
  --accent-2: #7ef0c0;
  --border: #283458;
  --code: #0a0f1d;
  --max: 1200px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: linear-gradient(180deg, #09101f 0%, #0e1428 100%);
  color: var(--text);
}

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

.layout {
  max-width: var(--max);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 24px;
  padding: 24px;
}

.sidebar {
  position: sticky;
  top: 24px;
  align-self: start;
  background: rgba(18, 25, 51, 0.92);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 20px;
  backdrop-filter: blur(12px);
}

.brand {
  font-size: 1.1rem;
  font-weight: 700;
  margin: 0 0 8px;
}

.tag {
  display: inline-block;
  font-size: 0.82rem;
  color: var(--accent-2);
  background: rgba(126, 240, 192, 0.08);
  border: 1px solid rgba(126, 240, 192, 0.18);
  border-radius: 999px;
  padding: 6px 10px;
  margin-bottom: 14px;
}

.nav { display: grid; gap: 8px; }
.nav a {
  padding: 10px 12px;
  border-radius: 10px;
  color: var(--text);
}
.nav a.active, .nav a:hover {
  background: var(--panel-2);
  text-decoration: none;
}

.download-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 20px;
  padding: 12px 16px;
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-2) 100%);
  color: var(--bg);
  font-weight: 600;
  font-size: 0.9rem;
  border-radius: 10px;
  text-decoration: none;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.download-btn:hover {
  text-decoration: none;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(105, 177, 255, 0.3);
}
.download-btn svg {
  width: 18px;
  height: 18px;
}

.content {
  background: rgba(18, 25, 51, 0.72);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 32px;
}

.hero {
  padding-bottom: 22px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 24px;
}

.hero h1 {
  margin: 0 0 10px;
  font-size: clamp(2rem, 4vw, 3rem);
}

.eyebrow {
  display: inline-block;
  margin-bottom: 10px;
  color: var(--accent-2);
  letter-spacing: .08em;
  text-transform: uppercase;
  font-size: .78rem;
  font-weight: 700;
}

.hero p, p, li { color: var(--muted); line-height: 1.65; }

h2, h3 {
  color: var(--text);
  margin-top: 28px;
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}

.cards-2 {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.cards-3 {
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.card {
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 18px;
}

.card h3 { margin-top: 0; }

.note, .warning, .success {
  border-radius: 14px;
  padding: 14px 16px;
  margin: 16px 0;
  border: 1px solid var(--border);
}

.note { background: rgba(105, 177, 255, 0.08); }
.warning { background: rgba(255, 183, 77, 0.1); }
.success { background: rgba(126, 240, 192, 0.08); }

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

pre {
  background: var(--code);
  border: 1px solid var(--border);
  padding: 16px;
  border-radius: 14px;
  overflow: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 18px 0;
}

th, td {
  border-bottom: 1px solid var(--border);
  text-align: left;
  padding: 12px 10px;
  vertical-align: top;
}

th { color: var(--text); }
td { color: var(--muted); }

.footer {
  margin-top: 28px;
  padding-top: 18px;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.92rem;
}

@media (max-width: 900px) {
  .layout { grid-template-columns: 1fr; }
  .sidebar { position: static; }
  .content { padding: 22px; }
}