:root {
  --bg: #0f172a;
  --panel: #111827;
  --panel-2: #1f2937;
  --text: #e5e7eb;
  --muted: #9ca3af;
  --accent: #60a5fa;
  --accent-2: #34d399;
  --warn: #fbbf24;
  --danger: #f87171;
  --border: #334155;
  --code: #020617;
  --max: 1180px;
}
* { 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, #0b1120 0%, var(--bg) 100%);
  color: var(--text);
  line-height: 1.65;
}
a { color: #93c5fd; text-decoration: none; }
a:hover { text-decoration: underline; }
.wrap { width: min(var(--max), calc(100% - 32px)); margin: 0 auto; }
header {
  border-bottom: 1px solid var(--border);
  background: rgba(15, 23, 42, .94);
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(8px);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 64px;
}
.brand { font-weight: 800; color: white; }
nav ul { list-style: none; display: flex; gap: 16px; padding: 0; margin: 0; flex-wrap: wrap; }
nav a { color: #cbd5e1; font-size: .95rem; }
.hero { padding: 70px 0 42px; }
.hero h1 { font-size: clamp(2.2rem, 7vw, 4.6rem); line-height: 1.05; margin: 0 0 20px; }
.hero p { max-width: 850px; color: #cbd5e1; font-size: 1.15rem; }
.badge {
  display: inline-block; padding: 6px 10px; border: 1px solid var(--border);
  border-radius: 999px; color: #bfdbfe; background: rgba(30, 41, 59, .7); font-size: .88rem;
}
main { padding-bottom: 80px; }
section { margin: 44px 0; }
h1,h2,h3 { color: white; }
h2 { margin-top: 0; font-size: 1.7rem; }
h3 { margin-top: 30px; }
p, li { color: #d1d5db; }
.grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}
.card {
  background: rgba(17,24,39,.88);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 22px;
}
.card h3 { margin-top: 0; }
.callout {
  border-left: 4px solid var(--accent);
  background: rgba(30,41,59,.75);
  padding: 16px 18px;
  border-radius: 10px;
  margin: 20px 0;
}
.callout.warn { border-left-color: var(--warn); }
.callout.good { border-left-color: var(--accent-2); }
.callout.danger { border-left-color: var(--danger); }
pre {
  position: relative;
  overflow-x: auto;
  background: var(--code);
  border: 1px solid #1e293b;
  border-radius: 12px;
  padding: 18px;
  color: #dbeafe;
  line-height: 1.5;
  font-size: .92rem;
}
code { font-family: "Cascadia Code", "SFMono-Regular", Consolas, monospace; }
:not(pre) > code {
  background: #0b1220;
  border: 1px solid #243041;
  padding: .1em .35em;
  border-radius: 6px;
  color: #dbeafe;
}
table {
  width: 100%;
  border-collapse: collapse;
  background: rgba(17,24,39,.72);
  border-radius: 12px;
  overflow: hidden;
}
th, td {
  border-bottom: 1px solid var(--border);
  padding: 12px 14px;
  text-align: left;
  vertical-align: top;
}
th { background: #1e293b; color: white; }
.arch {
  white-space: pre;
  overflow-x: auto;
  font-family: "Cascadia Code", Consolas, monospace;
  background: #020617;
  border: 1px solid #1e293b;
  padding: 20px;
  border-radius: 14px;
  color: #c7d2fe;
}
.step {
  display: grid;
  grid-template-columns: 42px 1fr;
  gap: 12px;
  margin: 16px 0;
}
.step-num {
  width: 34px; height: 34px; border-radius: 50%;
  display: grid; place-items: center;
  background: #1d4ed8; color: white; font-weight: 800;
}
.kbd {
  display: inline-block; padding: 1px 6px; border: 1px solid #475569;
  border-bottom-width: 3px; border-radius: 5px; background: #111827; color: white;
  font-family: monospace; font-size: .9em;
}
.footer {
  border-top: 1px solid var(--border);
  padding: 30px 0;
  color: var(--muted);
}
.toc ul { columns: 2; padding-left: 20px; }
.small { color: var(--muted); font-size: .92rem; }
@media (max-width: 800px) {
  .nav { align-items: flex-start; flex-direction: column; padding: 14px 0; }
  .grid { grid-template-columns: 1fr; }
  .toc ul { columns: 1; }
  .hero { padding-top: 42px; }
}