*{
    margin:0;
    padding:0;
    box-sizing:border-box;
}

body{

    font-family:Arial,Helvetica,sans-serif;

    background:#FCFCFC;

    display:flex;

    justify-content:center;

    align-items:center;

    min-height:100vh;

}

.container{

    width:100%;
    max-width:800px;

    background:white;

    border-radius:16px;

    padding:40px;

    box-shadow:0 10px 35px rgba(0,0,0,.08);

}

h1{

    font-family:Arial,Inter,sans-serif;
    
    margin-bottom:10px;

    color:#0278BD;

}

p{

    margin-bottom:25px;

    color:#666;

}

.consulta{
    display:flex;
    gap:10px;
    align-items:stretch;
}

.consulta input{
    flex:1;
    min-width:0;
}

.consulta button{
    white-space:nowrap;
}

input{

    flex:1;

    padding:15px;

    font-size:18px;

    border-radius:8px;

    border:1px solid #ccc;

}

button{

    background:#0278BD;

    color:white;

    border:none;

    border-radius:8px;

    cursor:pointer;

    padding:15px 25px;

    font-size:16px;

}

button:hover{

    background:#00408b;

}

#resultado{

    margin-top:30px;

}

.card{

    border-radius:12px;

    padding:25px;

    animation:fade .3s;

}

.sucesso{

    background:#e8fff0;

    border:1px solid #38b46d;

}

.erro{

    background:#fff2f2;

    border:1px solid #ff7676;

}

.card h2{

    margin-bottom:10px;

}

.card p{

    margin-bottom:20px;

}

.whatsapp{

    display:inline-block;

    text-decoration:none;

    color:white;

    background:#25D366;

    padding:14px 24px;

    border-radius:8px;

    font-weight:bold;

}

@keyframes fade{

    from{

        opacity:0;
        transform:translateY(10px);

    }

    to{

        opacity:1;
        transform:none;

    }

}

/* Smartphones */

@media (max-width: 600px){

    .container{

        padding:25px;

    }

    .consulta{

        flex-direction:column;

    }

    .consulta input,
    .consulta button{

        width:100%;

    }

    .consulta button{

        margin-top:5px;

    }

}
Aproveitando, eu fa