:root{--background:#fff;--foreground:#171717;--header-bg:#1976d2;--header-color:#fff;--font-sans:Arial,Helvetica,sans-serif}body{background-color:var(--background);color:var(--foreground);font-family:var(--font-sans);margin:0;padding:0}h1,h4{text-align:center;margin:0 0 12px}h1{margin-bottom:20px;font-size:1.75rem;font-weight:700}h4{margin-bottom:12px;font-size:1rem;font-weight:200}.container{grid-template-columns:1fr;gap:16px;max-width:1200px;margin:0 auto;display:grid}@media (min-width:768px){.container{grid-template-columns:1fr 1fr}}