:root {
  --bg: #fafaf8; --text: #1c1c1e; --muted: #6b6b70; --accent: #2f5bea; --card: #ffffff; --line: #e6e6e3;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #121214; --text: #f2f2f4; --muted: #9a9aa2; --accent: #7a9bff; --card: #1b1b1f; --line: #2a2a30; }
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font: 16px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}
.wrap { max-width: 760px; margin: 0 auto; padding: 0 20px; }
header { padding: 24px 0; border-bottom: 1px solid var(--line); }
header .wrap { display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap; }
.logo { font-weight: 700; font-size: 18px; letter-spacing: -0.01em; }
a.logo { color: inherit; text-decoration: none; }
nav a { color: var(--muted); text-decoration: none; margin-left: 18px; font-size: 14px; }
nav a:hover { color: var(--text); }
.hero { padding: 80px 0 64px; }
.hero h1 { font-size: clamp(32px, 6vw, 48px); line-height: 1.1; letter-spacing: -0.02em; margin: 0 0 16px; }
.hero p { font-size: 18px; color: var(--muted); margin: 0 0 28px; max-width: 560px; }
.page-head { padding: 56px 0 32px; }
.page-head h1 { font-size: clamp(28px, 5vw, 36px); line-height: 1.15; letter-spacing: -0.02em; margin: 0; }
.btn { display: inline-block; background: var(--accent); color: #fff; padding: 12px 22px; border-radius: 10px; text-decoration: none; font-weight: 600; }
section { padding: 48px 0; border-top: 1px solid var(--line); }
h2 { font-size: 24px; margin: 0 0 16px; letter-spacing: -0.01em; }
h3 { font-size: 17px; margin: 24px 0 6px; }
p, li { color: var(--text); }
.muted { color: var(--muted); }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 20px 24px; }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 16px; margin-bottom: 16px; }
.grid .card h3 { margin-top: 0; }
.grid .card p { margin: 0; }
dl { margin: 0; display: grid; grid-template-columns: max-content 1fr; gap: 6px 20px; }
dt { color: var(--muted); }
dd { margin: 0; }
@media (max-width: 520px) { dl { grid-template-columns: 1fr; } dd { margin-bottom: 8px; } nav a { margin: 0 14px 0 0; } }
a { color: var(--accent); }
footer { padding: 32px 0 48px; border-top: 1px solid var(--line); color: var(--muted); font-size: 14px; }
footer .wrap { display: flex; justify-content: space-between; align-items: center; gap: 12px 24px; flex-wrap: wrap; }
footer nav { display: flex; gap: 18px; flex-wrap: wrap; }
footer nav a { margin: 0; }