:root {
  color-scheme: light;
  --bg: #f6f7fb;
  --card: #ffffff;
  --ink: #111827;
  --muted: #5b6472;
  --line: #d9dee8;
  --accent: #2563eb;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.5;
}
a { color: var(--accent); }
a:focus-visible, .button:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 4px; }
header, main, footer { width: min(1120px, calc(100% - 32px)); margin: 0 auto; }
.site-header { padding: 28px 0 18px; }
.nav { display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.brand { color: var(--ink); text-decoration: none; font-weight: 800; letter-spacing: -0.03em; }
.nav-links { display: flex; gap: 14px; flex-wrap: wrap; font-size: 14px; }
.nav-links a { color: var(--muted); text-decoration: none; }
.nav-links a:hover { color: var(--ink); }
.hero { padding: 56px 0 24px; }
.hero h1 { max-width: 820px; margin: 0 0 16px; font-size: clamp(34px, 6vw, 64px); line-height: 1; letter-spacing: -0.055em; }
.hero p { max-width: 720px; color: var(--muted); font-size: 18px; }
.actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 24px; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 42px; padding: 0 16px; border-radius: 12px; text-decoration: none; font-weight: 700; border: 1px solid var(--line); background: var(--card); color: var(--ink); }
.button.primary { background: var(--ink); color: #fff; border-color: var(--ink); }
.grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; margin: 28px 0; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 18px; padding: 20px; box-shadow: 0 8px 30px rgba(15, 23, 42, 0.06); }
.card h2, .card h3 { margin-top: 0; letter-spacing: -0.025em; }
.card p { color: var(--muted); }
.content { padding: 30px 0 56px; }
.content h1 { font-size: clamp(30px, 4vw, 46px); line-height: 1.05; letter-spacing: -0.045em; }
.content section { margin: 28px 0; }
.site-footer { padding: 32px 0 42px; color: var(--muted); border-top: 1px solid var(--line); }
@media (max-width: 800px) {
  .nav { align-items: flex-start; flex-direction: column; }
  .grid { grid-template-columns: 1fr; }
}