:root { --accent: #7c3aed; --ink: #12161c; --muted: #5b6472; --line: #e3e7ee; }
* { box-sizing: border-box; }
body { margin: 0; font: 16px/1.6 -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
       color: var(--ink); background: #fff; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
.site-header { display: flex; align-items: center; justify-content: space-between;
               gap: 24px; padding: 18px 32px; border-bottom: 1px solid var(--line); }
.logo { font-weight: 700; font-size: 20px; color: var(--ink); }
.site-header nav a { margin-left: 20px; color: var(--muted); font-size: 15px; }
main { max-width: 960px; margin: 0 auto; padding: 48px 32px 72px; }
.hero h1 { font-size: 40px; line-height: 1.15; margin: 0 0 16px; }
.hero p { font-size: 19px; color: var(--muted); max-width: 640px; margin: 0 0 24px; }
.cta { display: inline-block; padding: 11px 22px; border-radius: 8px;
       background: var(--accent); color: #fff; font-weight: 600; }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
        gap: 24px; margin: 48px 0 0; }
.card { border: 1px solid var(--line); border-radius: 12px; padding: 22px; }
.card h3 { margin: 0 0 8px; font-size: 18px; }
.card p { margin: 0; color: var(--muted); font-size: 15px; }
.lead { font-size: 18px; color: var(--muted); }
footer { border-top: 1px solid var(--line); padding: 24px 32px;
         color: var(--muted); font-size: 14px; text-align: center; }
dl { display: grid; grid-template-columns: 160px 1fr; gap: 10px 20px; }
dt { color: var(--muted); }