:root {
  color-scheme: dark;
  --bg: #0b0b0f;
  --text: #f2f2f5;
  --muted: #a3a3ad;
  --line: #26262e;
  --accent: #e5a50a;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}
header, main, footer { max-width: 720px; margin: 0 auto; padding: 0 24px; }
header { display: flex; align-items: center; justify-content: space-between; padding-top: 24px; padding-bottom: 24px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 19px; color: var(--text); text-decoration: none; }
.brand img { border-radius: 8px; }
nav { display: flex; gap: 20px; }
nav a { color: var(--muted); text-decoration: none; font-size: 15px; }
nav a:hover { color: var(--text); }
h1 { font-size: 40px; line-height: 1.15; letter-spacing: -0.02em; margin: 32px 0 16px; }
h2 { font-size: 21px; margin: 40px 0 8px; }
p { color: var(--muted); margin: 0 0 16px; }
b { color: var(--text); }
a { color: var(--accent); }
.hero h1 { font-size: 56px; margin-top: 48px; }
.lede { font-size: 21px; color: var(--text); max-width: 560px; }
.button {
  display: inline-block; padding: 12px 20px; border-radius: 10px;
  background: var(--accent); color: #111; font-weight: 600; text-decoration: none;
}
details { border-top: 1px solid var(--line); padding: 14px 0; }
details:last-of-type { border-bottom: 1px solid var(--line); }
summary { cursor: pointer; font-weight: 600; }
details p { margin: 10px 0 0; }
ul { color: var(--muted); padding-left: 20px; }
li { margin-bottom: 10px; }
footer { margin-top: 64px; padding-top: 24px; padding-bottom: 48px; border-top: 1px solid var(--line); color: var(--muted); font-size: 14px; }
@media (max-width: 520px) {
  h1 { font-size: 32px; }
  .hero h1 { font-size: 44px; }
  nav { gap: 14px; }
}