:root {
  --ink: #16202e;
  --muted: #5a6475;
  --paper: #f7f8fa;
  --surface: #ffffff;
  --line: #e2e6ec;
  --accent: #1e3a5f;
  --accent-hover: #152a46;
  --tag-bg: #eaf0f7;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 17px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}
.wrap { max-width: 960px; margin: 0 auto; padding: 0 20px; }
a { color: var(--accent); }
a:hover { color: var(--accent-hover); }
.top { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding-top: 20px; padding-bottom: 20px; flex-wrap: wrap; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; text-decoration: none; color: var(--ink); }
.mark { display: inline-grid; place-items: center; width: 40px; height: 40px; border-radius: 9px; background: var(--accent); color: #fff; font-size: 12px; letter-spacing: 0.5px; }
nav a { margin-left: 18px; text-decoration: none; font-weight: 500; }
nav a:first-child { margin-left: 0; }
.hero { padding-top: 48px; padding-bottom: 24px; }
h1 { font-size: clamp(30px, 5vw, 44px); line-height: 1.15; margin: 0 0 16px; letter-spacing: -0.5px; }
h2 { font-size: 26px; margin: 48px 0 16px; }
h3 { font-size: 22px; margin: 4px 0 8px; }
.lede { font-size: 19px; color: var(--muted); max-width: 680px; margin: 0; }
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 20px; }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: 12px; padding: 24px; }
.tag { display: inline-block; margin: 0; padding: 3px 10px; border-radius: 999px; background: var(--tag-bg); color: var(--accent); font-size: 13px; font-weight: 600; }
.btn { display: inline-block; padding: 10px 16px; border-radius: 8px; background: var(--accent); color: #fff; text-decoration: none; font-weight: 600; }
.btn:hover { background: var(--accent-hover); color: #fff; }
.muted { color: var(--muted); }
.foot { margin-top: 64px; padding-top: 24px; padding-bottom: 40px; border-top: 1px solid var(--line); color: var(--muted); font-size: 14px; }
.prose { max-width: 720px; }
@media (max-width: 520px) { nav a { margin-left: 12px; } .hero { padding-top: 24px; } }