*{
    box-sizing:border-box;
}

body{
    margin:0;
    min-height:100vh;
    display:flex;
    align-items:center;
    justify-content:center;
    font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
    background:linear-gradient(135deg,#5865F2,#404EED);
    color:white;
    padding:20px;
}

.card{
    text-align:center;
    background:rgba(0,0,0,0.25);
    backdrop-filter:blur(10px);
    padding:40px;
    border-radius:16px;
    box-shadow:0 20px 40px rgba(0,0,0,0.3);
    max-width:420px;
    width:100%;
}

h1{
    margin-top:0;
    font-size:28px;
}

p{
    opacity:.9;
    margin-bottom:25px;
}

button{
    border:none;
    padding:14px 28px;
    border-radius:10px;
    font-size:16px;
    cursor:pointer;
    background:white;
    color:#5865F2;
    font-weight:600;
}

/* 📱 Móvil */
@media (max-width:600px){

    .card{
        padding:28px 22px;
        border-radius:14px;
    }

    h1{
        font-size:22px;
    }

    p{
        font-size:14px;
    }

    button{
        width:100%;
        font-size:15px;
    }
}