body{
    font-family: -apple-system, BlinkMacSystemFont, sans-serif;
    background-color:#f0f0f0;
    color:#333;
    display:flex;
    justify-content:center;
    align-items:center;
    height:100vh;
    margin:0;
}
.container{
    text-align:center;
    padding:20px;
    border-radius:12px;
    background-color:#fff;
    box-shadow:0 8px 24px rgba(0,0,0,.12);
}
h1{ color:#4a90e2; margin-top:0 }
a{ color:#4a90e2; text-decoration:none; }
a:hover{ text-decoration:underline; }