:root {
  --bg: #ffffff;
  --text: #16181d;
  --muted: #5b6270;
  --accent: #c97510;
  --card: #f5f6f8;
  --border: #e3e6ea;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #111317; --text: #eceef2; --muted: #a2a9b5; --accent: #ffb547; --card: #1b1e24; --border: #2a2e36; }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}
main, header, footer { max-width: 760px; margin: 0 auto; padding: 0 20px; }
header { padding-top: 28px; display: flex; align-items: center; gap: 12px; }
header a { color: var(--text); text-decoration: none; font-weight: 600; }
nav { margin-left: auto; display: flex; gap: 18px; font-size: 15px; }
nav a { color: var(--muted); font-weight: 500; }
h1 { font-size: 38px; line-height: 1.15; margin: 48px 0 8px; }
h2 { font-size: 22px; margin: 36px 0 8px; }
p, li { color: var(--text); }
.lede { font-size: 20px; color: var(--muted); margin-top: 0; }
a { color: var(--accent); }
.hero { display: flex; gap: 24px; align-items: center; margin-top: 40px; }
.hero img { width: 112px; height: 112px; border-radius: 24px; box-shadow: 0 6px 20px rgba(0,0,0,.2); }
.hero h1 { margin: 0; }
.features { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 14px; margin: 28px 0; }
.features div { background: var(--card); border: 1px solid var(--border); border-radius: 14px; padding: 16px 18px; }
.features h3 { margin: 0 0 4px; font-size: 17px; }
.features p { margin: 0; color: var(--muted); font-size: 15px; }
.note { background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 14px 18px; color: var(--muted); }
footer { margin-top: 56px; padding-bottom: 40px; color: var(--muted); font-size: 14px; border-top: 1px solid var(--border); padding-top: 18px; }
@media (max-width: 520px) { h1 { font-size: 30px; } .hero { flex-direction: column; align-items: flex-start; } }