:root {
  --bg: #f3f8fb;
  --fg: #11283a;
  --muted: #55707f;
  --line: #d3e3ec;
  --card: #ffffff;
  --accent: #1b6e9c;
  --accent-fg: #ffffff;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0c1a24;
    --fg: #e6f1f7;
    --muted: #8fa9b8;
    --line: #1f3544;
    --card: #12232f;
    --accent: #5ab4e0;
    --accent-fg: #07202e;
  }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 17px/1.65 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

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

.nav, main, footer {
  max-width: 880px;
  margin: 0 auto;
  padding-left: 20px;
  padding-right: 20px;
}

.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 24px;
  padding-bottom: 24px;
}
.nav .brand { color: var(--fg); font-weight: 650; }
.nav nav a { margin-left: 20px; color: var(--muted); }
.nav nav a:hover { color: var(--fg); text-decoration: none; }

section { padding: 56px 0; border-top: 1px solid var(--line); }
.hero { border-top: 0; padding: 72px 0 80px; }

.eyebrow {
  color: var(--accent);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: .08em;
  text-transform: uppercase;
  margin: 0 0 16px;
}
h1 {
  font-size: clamp(2rem, 5vw, 3.2rem);
  line-height: 1.15;
  margin: 0 0 20px;
  letter-spacing: -0.02em;
}
h2 { font-size: 1.5rem; margin: 0 0 24px; letter-spacing: -0.01em; }
h3 { margin: 0 0 8px; font-size: 1.1rem; }
.lede { font-size: 1.15rem; color: var(--muted); max-width: 40em; }

.actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 28px; }
.btn {
  display: inline-block;
  padding: 10px 20px;
  border-radius: 8px;
  background: var(--accent);
  color: var(--accent-fg);
  font-weight: 600;
}
.btn:hover { text-decoration: none; opacity: .9; }
.btn.ghost { background: transparent; color: var(--fg); border: 1px solid var(--line); }

.about-grid { display: grid; grid-template-columns: 1.6fr 1fr; gap: 40px; }
.facts { list-style: none; margin: 0; padding: 0; }
.facts li { padding: 10px 0; border-bottom: 1px solid var(--line); }
.facts span { display: block; font-size: 13px; color: var(--muted); text-transform: uppercase; letter-spacing: .06em; }

.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 20px; }
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 22px;
}
.card p { margin: 0 0 12px; color: var(--muted); font-size: 15px; }
.card .tags { font-size: 13px; }

.links a { margin-right: 20px; }

footer { padding-top: 32px; padding-bottom: 48px; color: var(--muted); font-size: 14px; border-top: 1px solid var(--line); }

@media (max-width: 640px) {
  .about-grid { grid-template-columns: 1fr; gap: 24px; }
  section { padding: 40px 0; }
  .hero { padding: 48px 0 56px; }
}