:root {
  color-scheme: light dark;
  --ink: #071625;
  --paper: #f5fbfc;
  --card: rgba(255, 255, 255, .82);
  --mint: #2ed2b3;
  --sky: #6fbcf7;
  --line: rgba(7, 22, 37, .12);
}
* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at 15% 0%, rgba(46, 210, 179, .28), transparent 34rem),
    radial-gradient(circle at 100% 10%, rgba(111, 188, 247, .26), transparent 38rem),
    var(--paper);
  line-height: 1.6;
}
a { color: #075f8f; }
.shell { width: min(900px, calc(100% - 32px)); margin: 0 auto; }
header { padding: 28px 0 12px; }
.brand { display: flex; align-items: center; gap: 13px; color: inherit; text-decoration: none; }
.mark {
  display: grid; place-items: center; width: 50px; height: 50px; border-radius: 17px;
  background: linear-gradient(145deg, var(--mint), var(--sky)); font-weight: 900; font-size: 24px;
}
.wordmark { font-size: 22px; font-weight: 900; letter-spacing: .12em; }
main { padding: 34px 0 64px; }
.hero { padding: clamp(28px, 7vw, 68px); border: 1px solid var(--line); border-radius: 32px; background: var(--card); box-shadow: 0 24px 60px rgba(7, 22, 37, .08); }
.eyebrow { color: #147a70; font-size: 13px; font-weight: 800; letter-spacing: .14em; text-transform: uppercase; }
h1 { margin: 10px 0 14px; font-size: clamp(38px, 8vw, 72px); line-height: 1.02; letter-spacing: -.04em; }
h2 { margin-top: 34px; line-height: 1.2; }
p.lead { max-width: 680px; font-size: clamp(19px, 3vw, 25px); color: rgba(7, 22, 37, .72); }
.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 26px; }
.button { display: inline-flex; min-height: 48px; align-items: center; padding: 10px 18px; border-radius: 15px; background: var(--ink); color: white; text-decoration: none; font-weight: 750; }
.button.secondary { background: rgba(7, 22, 37, .08); color: var(--ink); }
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-top: 22px; }
.card { padding: 20px; border-radius: 22px; border: 1px solid var(--line); background: var(--card); }
.card h2, .card h3 { margin-top: 0; }
.document { padding: clamp(24px, 6vw, 54px); border: 1px solid var(--line); border-radius: 28px; background: var(--card); }
.document li { margin: 8px 0; }
.tip { margin: 22px 0; padding: 16px 18px; border-left: 4px solid var(--mint); background: rgba(46, 210, 179, .1); border-radius: 10px; }
footer { padding: 28px 0 42px; border-top: 1px solid var(--line); font-size: 14px; }
footer nav { display: flex; flex-wrap: wrap; gap: 18px; }
@media (max-width: 700px) { .grid { grid-template-columns: 1fr; } }
@media (prefers-color-scheme: dark) {
  :root { --ink: #f1f7f8; --paper: #07101b; --card: rgba(13, 28, 42, .84); --line: rgba(255, 255, 255, .12); }
  p.lead { color: rgba(241, 247, 248, .72); }
  .button { background: var(--mint); color: #071625; }
  .button.secondary { background: rgba(255, 255, 255, .1); color: var(--ink); }
  a { color: #7ac8ff; }
}