:root {
  --ink: #0B1220;
  --muted: #5a6b7a;
  --line: rgba(11, 18, 32, 0.12);
  --paper: #EEF2F7;
  --card: #ffffff;
  --blue: #0D47A1;
  --blue-deep: #001B45;
  --accent: #D4A017;
  --shadow: 0 18px 50px rgba(11, 18, 32, 0.08);
  --radius: 18px;
  --max: 820px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: Sora, "DM Sans", system-ui, sans-serif;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.65;
  min-height: 100vh;
}
.bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(900px 500px at 10% -10%, rgba(13, 71, 161, 0.18), transparent 60%),
    radial-gradient(700px 420px at 100% 0%, rgba(212, 160, 23, 0.12), transparent 55%),
    linear-gradient(180deg, #e8eef7 0%, var(--paper) 45%, #e4ebf4 100%);
}
a { color: var(--blue); }
code {
  font-size: 0.92em;
  background: rgba(13, 71, 161, 0.08);
  padding: 0.12em 0.4em;
  border-radius: 6px;
}

.site-header {
  max-width: 1100px;
  margin: 0 auto;
  padding: 22px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--ink);
  font-weight: 700;
  letter-spacing: -0.02em;
}
.brand-mark {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  background: linear-gradient(145deg, #1E88E5, var(--blue) 45%, var(--blue-deep));
  color: #fff;
  font-weight: 800;
  font-size: 14px;
  box-shadow: 0 8px 20px rgba(13, 71, 161, 0.25);
}
.brand-text { font-size: 15px; }
nav {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
}
nav a {
  text-decoration: none;
  color: var(--muted);
  font-weight: 600;
  font-size: 14px;
}
nav a:hover { color: var(--blue); }

.hero, .doc {
  max-width: var(--max);
  margin: 0 auto;
  padding: 24px 24px 64px;
}
.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 12px;
  font-weight: 700;
  color: var(--blue);
  margin: 0 0 10px;
}
h1 {
  font-size: clamp(28px, 5vw, 42px);
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin: 0 0 14px;
}
.lede, .meta {
  color: var(--muted);
  margin: 0 0 22px;
}
.meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 20px;
  font-size: 14px;
}
.card-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  margin-top: 28px;
}
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: var(--shadow);
  text-decoration: none;
  color: inherit;
}
.card h2 { margin: 0 0 8px; font-size: 20px; }
.card p { margin: 0; color: var(--muted); font-size: 14px; }
.card-link {
  display: inline-block;
  margin-top: 14px;
  color: var(--blue);
  font-weight: 700;
  font-size: 14px;
}
.doc section { margin: 28px 0; }
.doc h2 { font-size: 20px; margin: 0 0 10px; }
.doc h3 { font-size: 16px; margin: 18px 0 8px; }
.doc ul, .doc ol { padding-left: 1.2em; }
.doc li { margin: 6px 0; }
.notice {
  background: rgba(13, 71, 161, 0.08);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 14px 16px;
  margin: 16px 0;
}
.site-footer {
  max-width: 1100px;
  margin: 0 auto;
  padding: 28px 24px 40px;
  color: var(--muted);
  font-size: 13px;
  border-top: 1px solid var(--line);
}
.site-footer a { font-weight: 600; }

@media (max-width: 720px) {
  .card-grid { grid-template-columns: 1fr; }
  .site-header { flex-direction: column; align-items: flex-start; }
}