*{box-sizing:border-box;margin:0;padding:0}body{color:#fff;background:#0f172a;font-family:Arial,sans-serif}.container{max-width:1100px;margin:auto;padding:2rem}button{color:#fff;cursor:pointer;background:#2563eb;border:none;border-radius:6px;padding:.8rem 1.2rem}button:hover{opacity:.9}input{border:none;border-radius:6px;width:100%;margin-bottom:1rem;padding:.8rem}