:root{color:#1a1a1a;background:#f5f7fa;font-family:system-ui,sans-serif}body{place-items:center;min-height:100vh;margin:0;display:grid}.container{text-align:center;padding:2rem}h1{color:#0b3d6e;margin-bottom:.5rem;font-size:2.5rem}button{color:#fff;cursor:pointer;background:#0b3d6e;border:0;border-radius:8px;padding:.7rem 1.4rem;font-size:1rem}button:hover{background:#125a9e}footer{color:#777;margin-top:2rem;font-size:.9rem}