:root {
  color-scheme: dark;
  --background: #0e1116;
  --surface: #171c23;
  --text: #f4f1e8;
  --secondary: #aeb5c0;
  --lime: #c7f464;
  --aqua: #61d6e8;
  --border: rgba(255, 255, 255, 0.08);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background:
    radial-gradient(circle at 85% 0%, rgba(199, 244, 100, 0.08), transparent 30rem),
    radial-gradient(circle at 0% 45%, rgba(97, 214, 232, 0.05), transparent 28rem),
    var(--background);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.65;
}

main {
  width: min(820px, calc(100% - 40px));
  margin: 0 auto;
  padding: 64px 0 96px;
}

.brand {
  color: var(--lime);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.16em;
}

h1 {
  margin: 12px 0 8px;
  font-size: clamp(36px, 7vw, 64px);
  line-height: 1;
  letter-spacing: -0.04em;
}

h2 { margin: 42px 0 10px; font-size: 22px; line-height: 1.25; }
p, li { color: var(--secondary); }
a { color: var(--aqua); text-underline-offset: 3px; }
a:hover { color: var(--lime); }
strong { color: var(--text); }
ul { padding-left: 22px; }
li + li { margin-top: 8px; }

.meta, .notice {
  padding: 16px 18px;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: var(--surface);
}

.meta { margin: 24px 0 34px; }
.notice { margin-top: 34px; }
.language { float: right; font-weight: 700; }
.footer {
  margin-top: 48px;
  padding-top: 22px;
  border-top: 1px solid var(--border);
  color: var(--secondary);
  font-size: 14px;
}

@media (max-width: 560px) {
  main { padding-top: 36px; }
  .language { float: none; display: block; margin-bottom: 22px; }
}