:root {
  --bg: #f5f5f7; --surface: #ffffff; --text: #1d1d1f; --muted: #6e6e73; --line: #d2d2d7;
  --accent: #1f9e46; --on-accent: #ffffff; --link: #0a66d6;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #0b0d12; --surface: #15181f; --text: #f5f5f7; --muted: #a1a1a6; --line: #2a2e37;
          --accent: #30d158; --on-accent: #04210d; --link: #5ac8fa; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text);
       font: 17px/1.55 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, sans-serif; }
a { color: var(--link); text-decoration: none; }
a:hover { text-decoration: underline; }
header, main, footer { max-width: 760px; margin: 0 auto; padding: 0 16px; }
header { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; padding-top: 24px; padding-bottom: 8px; }
header img { width: 40px; height: 40px; }
header .brand { font-weight: 700; font-size: 20px; color: var(--text); }
header nav { margin-left: auto; display: flex; gap: 18px; font-size: 15px; }
h1 { font-size: clamp(30px, 6vw, 46px); line-height: 1.1; margin: 32px 0 12px; letter-spacing: -0.02em; }
h2 { font-size: 22px; margin: 36px 0 8px; }
p.lead { font-size: 20px; color: var(--muted); margin: 0 0 24px; }
.hero { width: 100%; height: auto; border-radius: 14px; border: 1px solid var(--line); display: block; margin: 24px 0; }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: 14px; padding: 4px 20px; margin: 16px 0; }
.pill { display: inline-block; background: var(--accent); color: var(--on-accent); font-weight: 600; padding: 10px 18px;
        border-radius: 999px; }
.pill:hover { text-decoration: none; opacity: .9; }
ul { padding-left: 1.2em; }
li { margin: 6px 0; }
.muted { color: var(--muted); font-size: 15px; }
footer { padding-top: 32px; padding-bottom: 48px; color: var(--muted); font-size: 14px; }
@media (max-width: 520px) { header nav { gap: 14px; font-size: 14px; margin-left: 0; width: 100%; } }