body{background:#0f172a;color:#fff;font-family:Arial;padding:20px} .grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:15px} .tile,.card{background:#1e293b;padding:20px;border-radius:12px} input,button{display:block;width:100%;margin:8px 0;padding:10px}