:root {
  color-scheme: light dark;
  --background: #f5f7fa;
  --surface: rgba(255, 255, 255, 0.82);
  --text: #111827;
  --secondary: #667085;
  --line: rgba(17, 24, 39, 0.09);
  --blue: #0877ff;
  --navy: #0a1830;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(circle at 75% -10%, rgba(8, 119, 255, 0.17), transparent 32rem),
    var(--background);
  font-size: 17px;
  line-height: 1.58;
  -webkit-font-smoothing: antialiased;
}

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

.shell { width: min(780px, calc(100% - 40px)); margin: 0 auto; }

nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 76px;
}

.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--text); font-weight: 700; }
.brand:hover { text-decoration: none; }
.mark {
  width: 30px;
  height: 34px;
  border-radius: 48% 48% 44% 44%;
  background: linear-gradient(145deg, #1787ff, #0959d9);
  box-shadow: inset 0 1px 1px rgba(255,255,255,.45), 0 7px 20px rgba(8,119,255,.22);
  transform: rotate(8deg);
}

.nav-links { display: flex; gap: 20px; font-size: 15px; }

main { padding: 80px 0 100px; }
.hero { padding: 28px 0 70px; }
.eyebrow { color: var(--blue); font-size: 14px; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; }
h1 { max-width: 690px; margin: 12px 0 20px; font-size: clamp(44px, 9vw, 72px); line-height: 1.02; letter-spacing: -.045em; }
.lede { max-width: 620px; margin: 0; color: var(--secondary); font-size: clamp(19px, 3vw, 23px); line-height: 1.45; }

.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 32px; }
.button { display: inline-flex; padding: 11px 17px; border-radius: 999px; font-weight: 650; }
.button.primary { color: white; background: var(--blue); }
.button.secondary { color: var(--text); background: var(--surface); border: 1px solid var(--line); }
.button:hover { text-decoration: none; transform: translateY(-1px); }

.card {
  margin: 22px 0;
  padding: clamp(24px, 5vw, 42px);
  border: 1px solid var(--line);
  border-radius: 28px;
  background: var(--surface);
  box-shadow: 0 20px 60px rgba(10, 24, 48, 0.07);
  backdrop-filter: blur(18px);
}

.card h2 { margin-top: 0; font-size: 25px; letter-spacing: -.02em; }
h2 { margin-top: 48px; font-size: 28px; letter-spacing: -.025em; }
h3 { margin-top: 30px; font-size: 20px; }
p, li { color: var(--secondary); }
strong { color: var(--text); }
ul { padding-left: 22px; }

.document h1 { font-size: clamp(40px, 7vw, 58px); }
.document .updated { margin-bottom: 42px; color: var(--secondary); }

footer { padding: 30px 0 50px; border-top: 1px solid var(--line); color: var(--secondary); font-size: 14px; }

@media (prefers-color-scheme: dark) {
  :root { --background: #07101f; --surface: rgba(17, 29, 49, .82); --text: #f6f8fb; --secondary: #a6b0c1; --line: rgba(255,255,255,.09); }
  body { background: radial-gradient(circle at 75% -10%, rgba(8,119,255,.2), transparent 32rem), var(--background); }
}

@media (max-width: 520px) {
  .shell { width: min(100% - 28px, 780px); }
  nav { min-height: 64px; }
  .nav-links { gap: 12px; font-size: 14px; }
  main { padding-top: 48px; }
}