:root {
  color-scheme: dark;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #090b10;
  color: #f7f7fa;
}

* { box-sizing: border-box; }

body {
  min-height: 100vh;
  margin: 0;
  padding: 56px 20px 24px;
  background:
    radial-gradient(circle at 20% 10%, rgba(140, 92, 255, .22), transparent 34rem),
    radial-gradient(circle at 85% 75%, rgba(184, 255, 61, .12), transparent 32rem),
    #090b10;
}

.card {
  width: min(720px, 100%);
  margin: 0 auto;
  padding: clamp(28px, 6vw, 56px);
  border: 1px solid #292b35;
  border-radius: 28px;
  background: rgba(18, 19, 26, .88);
  box-shadow: 0 24px 80px rgba(0, 0, 0, .35);
}

.hero { text-align: center; padding-block: 72px; }
.mark { color: #b8ff3d; font-size: 76px; font-weight: 800; line-height: .8; }
.eyebrow { color: #b8ff3d; font-size: 12px; font-weight: 800; letter-spacing: .18em; }
h1 { margin: 10px 0 18px; font-size: clamp(42px, 9vw, 68px); letter-spacing: -.05em; }
h2 { margin-top: 34px; color: #b8ff3d; font-size: 18px; }
p { color: #c7c8d0; font-size: 17px; line-height: 1.65; }
.lead { color: #f1f1f5; font-size: 20px; }
a { color: #b8ff3d; }
nav { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; margin-top: 34px; }
.button { padding: 13px 20px; border-radius: 999px; background: #b8ff3d; color: #090b10; font-weight: 750; text-decoration: none; }
.button.secondary { background: #8c5cff; color: white; }
.back { display: inline-block; margin-bottom: 28px; color: #aaa8b4; text-decoration: none; }
footer { padding-top: 26px; color: #777985; font-size: 13px; text-align: center; }