:root {
  color-scheme: light dark;
  --bg: #f5f7fb;
  --surface: rgba(255,255,255,.78);
  --surface-strong: rgba(255,255,255,.94);
  --text: #151823;
  --muted: #5b6475;
  --line: rgba(38,50,76,.10);
  --accent: #4056c9;
  --accent-soft: #e8ebff;
  --shadow: 0 18px 60px rgba(46,59,96,.10);
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1118;
    --surface: rgba(28,31,43,.78);
    --surface-strong: rgba(31,35,48,.94);
    --text: #f5f7ff;
    --muted: #aeb6c7;
    --line: rgba(255,255,255,.10);
    --accent: #93a2ff;
    --accent-soft: #20284f;
    --shadow: 0 18px 60px rgba(0,0,0,.22);
  }
}
* { box-sizing: border-box; }
html { background: var(--bg); }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", Inter, system-ui, sans-serif;
  background:
    radial-gradient(circle at 85% 8%, rgba(95,111,255,.16), transparent 32rem),
    radial-gradient(circle at 5% 45%, rgba(73,205,214,.10), transparent 28rem),
    var(--bg);
  color: var(--text);
  line-height: 1.55;
}
a { color: inherit; }
.shell { width: min(920px, calc(100% - 32px)); margin: 0 auto; padding: 20px 0 52px; }
.nav {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 4px 26px;
}
.nav a { text-decoration: none; color: var(--muted); font-weight: 600; }
.nav .brand { color: var(--text); font-size: 22px; letter-spacing: -.03em; }
.hero {
  padding: 64px clamp(24px, 6vw, 64px);
  border: 1px solid var(--line);
  background: var(--surface);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-radius: 32px;
  box-shadow: var(--shadow);
}
.hero.compact { padding-top: 44px; padding-bottom: 44px; }
.eyebrow {
  margin: 0 0 14px; color: var(--accent); font-weight: 700;
  font-size: 13px; letter-spacing: .09em; text-transform: uppercase;
}
h1 { margin: 0; font-size: clamp(44px, 8vw, 72px); line-height: 1; letter-spacing: -.055em; }
.lede { max-width: 620px; margin: 22px 0 0; color: var(--muted); font-size: clamp(18px, 3vw, 22px); }
.actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 32px; }
.button {
  display: inline-flex; min-height: 48px; align-items: center; justify-content: center;
  padding: 0 20px; border-radius: 999px; font-weight: 700; text-decoration: none;
}
.button.primary { background: var(--accent); color: white; }
.button.secondary { background: var(--surface-strong); border: 1px solid var(--line); color: var(--text); }
.grid {
  display: grid; grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px; margin-top: 18px;
}
.card, .note, .prose {
  border: 1px solid var(--line); background: var(--surface);
  backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
  border-radius: 24px; box-shadow: var(--shadow);
}
.card { padding: 24px; }
.card h2, .note h2, .prose h2 { margin: 0 0 8px; letter-spacing: -.025em; }
.card p, .note p, .prose p { color: var(--muted); margin: 0; }
.note { padding: 26px; margin-top: 16px; }
.prose { margin-top: 18px; padding: clamp(24px, 5vw, 48px); }
.prose h2 { margin-top: 34px; font-size: 22px; }
.prose h2:first-child { margin-top: 0; }
.prose p + p { margin-top: 12px; }
.inline-link { color: var(--accent); font-weight: 700; }
footer {
  display: flex; flex-wrap: wrap; gap: 9px; align-items: center;
  padding: 26px 6px 0; color: var(--muted); font-size: 13px;
}
footer a { color: var(--muted); }
@media (max-width: 640px) {
  .shell { width: min(100% - 20px, 920px); }
  .hero { padding: 44px 24px; border-radius: 26px; }
  .grid { grid-template-columns: 1fr; }
  h1 { font-size: 48px; }
}
@media (prefers-reduced-transparency: reduce) {
  .hero, .card, .note, .prose { backdrop-filter: none; -webkit-backdrop-filter: none; background: var(--surface-strong); }
}