:root {
  color-scheme: dark;
  --night: #07111e;
  --surface: #0d1d2d;
  --surface-soft: #11283a;
  --ink: #eef8fb;
  --muted: #b0c4cf;
  --teal: #65d8d0;
  --line: rgba(159, 213, 218, .18);
}

* { box-sizing: border-box; }

html { background: var(--night); }

body {
  margin: 0;
  min-width: 320px;
  background:
    radial-gradient(circle at 82% 2%, rgba(54, 161, 170, .2), transparent 26rem),
    radial-gradient(circle at 0 20%, rgba(61, 104, 157, .16), transparent 24rem),
    var(--night);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  line-height: 1.62;
}

a { color: var(--teal); }
a:hover { color: #a6f1e9; }

.shell { width: min(100% - 32px, 760px); margin: 0 auto; }

header { padding: 48px 0 28px; }

.brand {
  color: var(--ink);
  font-size: 1.08rem;
  font-weight: 720;
  letter-spacing: .015em;
  text-decoration: none;
}

.eyebrow {
  margin: 28px 0 8px;
  color: var(--teal);
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: .13em;
  text-transform: uppercase;
}

h1, h2 { letter-spacing: -.025em; line-height: 1.15; }
h1 { max-width: 640px; margin: 0; font-size: clamp(2.1rem, 7vw, 3.5rem); }
h2 { margin: 36px 0 12px; font-size: 1.28rem; }
p, li { color: var(--muted); }
strong { color: var(--ink); }

.lead { max-width: 640px; margin: 20px 0 0; font-size: 1.08rem; }

main {
  margin: 12px auto 0;
  padding: 24px 28px 34px;
  background: rgba(13, 29, 45, .86);
  border: 1px solid var(--line);
  border-radius: 24px;
  box-shadow: 0 24px 80px rgba(0, 0, 0, .25);
}

.notice {
  margin: 20px 0 8px;
  padding: 14px 16px;
  border-left: 3px solid var(--teal);
  background: rgba(101, 216, 208, .08);
  border-radius: 0 12px 12px 0;
}

footer { padding: 28px 0 44px; color: var(--muted); font-size: .88rem; }

@media (max-width: 520px) {
  header { padding-top: 32px; }
  .shell { width: min(100% - 24px, 760px); }
  main { padding: 20px; border-radius: 18px; }
}