:root{--bg:#fff;--fg:#0f172a;--muted:#475569;--primary:#2563eb;--bg-alt:#f8fafc;--border:#e5e7eb;--card-bg:#fff;--shadow:0 1px 2px rgba(0,0,0,.05)}*{box-sizing:border-box}body{margin:0;font-family:ui-sans-serif,system-ui,Segoe UI,Roboto,Arial,sans-serif;color:var(--fg);background:var(--bg);line-height:1.6}.container{max-width:960px;margin:0 auto;padding:2rem}h1{font-size:2.25rem;line-height:1.2;letter-spacing:-.02em;margin:0 0 1rem}h2{font-size:1.5rem;margin:0 0 .75rem}h3{margin:0 0 .5rem}h3,p.lead{font-size:1.125rem}p.lead{color:var(--muted);margin:.5rem 0 1rem}a.button{display:inline-block;padding:.6rem 1rem;background:var(--primary);color:#fff;border-radius:.5rem;text-decoration:none}.section{margin:2rem 0}small.muted{color:var(--muted)}.site-header{position:-webkit-sticky;position:sticky;top:0;background:hsla(0,0%,100%,.9);-webkit-backdrop-filter:saturate(180%) blur(8px);backdrop-filter:saturate(180%) blur(8px);border-bottom:1px solid var(--border)}.site-header .header-inner{display:flex;align-items:center;justify-content:space-between;padding-top:.75rem;padding-bottom:.75rem}.site-header .brand a{font-weight:700;color:var(--fg);text-decoration:none}.site-header nav ul{display:flex;gap:1rem;list-style:none;padding:0;margin:0}.site-header nav a{color:var(--fg);text-decoration:none;padding:.25rem .5rem;border-radius:.375rem}.hero,.site-header nav a:hover{background:var(--bg-alt)}.hero{border:1px solid var(--border);border-radius:.75rem;padding:2rem;margin:2rem 0}.hero .actions{display:flex;gap:.75rem;flex-wrap:wrap;margin-top:1rem}.btn,a.button{display:inline-block;padding:.65rem 1rem;border-radius:.5rem;text-decoration:none;font-weight:600}.btn{background:var(--primary);color:#fff}.btn:hover{filter:brightness(.95)}.btn-secondary{background:#fff;color:var(--fg);border:1px solid var(--border)}.btn-secondary:hover{background:var(--bg-alt)}.grid{display:grid;grid-gap:1rem;gap:1rem}.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}@media (max-width:900px){.grid-3{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (max-width:640px){.grid-3{grid-template-columns:1fr}}.card{background:var(--card-bg);border:1px solid var(--border);border-radius:.75rem;padding:1rem;box-shadow:var(--shadow)}