:root{--bg:#f8fafc;--card:#fff;--fg:#111827;--muted:#6b7280;--brand:#2563eb;--brand-2:#1d4ed8}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--fg);font:16px/1.6 system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,'Helvetica Neue',Arial}
.container{max-width:72rem;margin:0 auto;padding:2.5rem 1rem}
.h1{font-size:2rem;font-weight:800;margin:0 0 .75rem}.lead{color:var(--muted);font-size:1.1rem;margin:.25rem 0 0}
.grid{display:grid;gap:.75rem}.g-2{grid-template-columns:repeat(2,minmax(0,1fr))}.g-3{grid-template-columns:repeat(3,minmax(0,1fr))}.g-4{grid-template-columns:repeat(4,minmax(0,1fr))}
@media(min-width:768px){.h1{font-size:2.5rem}.g-md-3{grid-template-columns:repeat(3,minmax(0,1fr))}.g-md-4{grid-template-columns:repeat(4,minmax(0,1fr))}}
.card{background:var(--card);border:1px solid #e5e7eb;border-radius:16px;padding:1rem;box-shadow:0 1px 1px rgba(0,0,0,.02)}
.btn{display:inline-block;background:var(--brand);color:#fff;padding:.65rem 1rem;border-radius:.75rem;text-decoration:none;font-weight:600}
.btn:focus,.btn:hover{background:var(--brand-2)}
input,select,button{font:inherit}input,select{width:100%;border:1px solid #e5e7eb;border-radius:.5rem;padding:.5rem .6rem}
button{cursor:pointer;border:0}
.small{font-size:.9rem;color:var(--muted)}
.prose p{margin:.5rem 0}
footer{border-top:1px solid #e5e7eb;margin-top:2rem;padding:2rem 0;color:var(--muted)}