body{
    font-family: Arial, sans-serif;
    background: linear-gradient(135deg,#2563eb,#7c3aed);
    display:flex;
    justify-content:center;
    align-items:center;
    height:100vh;
    margin:0;
}

.contenedor{
    background:white;
    padding:30px;
    border-radius:15px;
    text-align:center;
    width:350px;
    box-shadow:0 0 20px rgba(0,0,0,.3);
}

input{
    width:80%;
    padding:10px;
    margin:10px;
}

button{
    padding:10px 20px;
    margin:10px;
    border:none;
    border-radius:5px;
    background:#2563eb;
    color:white;
    cursor:pointer;
}

button:hover{
    background:#1d4ed8;
}

#mensaje{
    color:#dc2626;
}