:root {
  --bg: #0d1118;
  --panel: #171e2d;
  --line: rgba(169, 183, 213, 0.18);
  --text: #eef3ff;
  --muted: #98a5bd;
  --accent: #42d7cc;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background: var(--bg);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-width: 320px;
  background:
    radial-gradient(circle at 10% 0%, rgba(47, 168, 160, 0.16), transparent 28rem),
    linear-gradient(180deg, #0d1118 0%, #101622 70%, #0d1118 100%);
}

a {
  color: #dffdfa;
  text-decoration: none;
}

.shell {
  width: min(880px, calc(100% - 36px));
  margin: 0 auto;
}

.topbar,
.footer {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  padding: 24px 0;
  color: var(--muted);
}

.brand {
  color: var(--text);
  font-weight: 800;
}

main {
  padding: 44px 0 64px;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--accent);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

h1 {
  margin: 0 0 22px;
  font-size: clamp(38px, 8vw, 72px);
  line-height: 0.96;
  letter-spacing: -0.06em;
}

h2 {
  margin: 34px 0 12px;
  font-size: 24px;
  letter-spacing: -0.03em;
}

p,
li {
  color: var(--muted);
  line-height: 1.75;
}

.card {
  padding: clamp(24px, 5vw, 42px);
  border: 1px solid var(--line);
  border-radius: 28px;
  background: rgba(255, 255, 255, 0.045);
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.22);
}

.notice {
  margin: 24px 0;
  padding: 16px;
  border: 1px solid rgba(224, 179, 65, 0.34);
  border-radius: 18px;
  color: #f3ddb0;
  background: rgba(224, 179, 65, 0.09);
}

.footer {
  border-top: 1px solid var(--line);
  font-size: 14px;
}

button {
  padding: 10px 14px;
  border: 1px solid rgba(66, 215, 204, 0.32);
  border-radius: 999px;
  color: #dffdfa;
  font: inherit;
  background: rgba(47, 168, 160, 0.1);
  cursor: pointer;
}

@media (max-width: 640px) {
  .topbar,
  .footer {
    flex-direction: column;
  }
}