body{
    font-family: Arial, sans-serif;
    background:#f5f7fa;
    margin:0;
    padding:0;
}

.contacto-box{
    max-width:600px;
    background:#ffffff;
}

h2{
    text-align:center;
    margin-bottom:30px;
    color:#1d3557;
}

.form-group{
    margin-bottom:18px;
}

label{
    display:block;
    margin-bottom:6px;
    font-weight:bold;
    color:#333;
}

input, textarea{
    width:100%;
    padding:12px;
    border:1px solid #ccc;
    border-radius:8px;
    font-size:16px;
    box-sizing:border-box;
}

textarea{
    resize:vertical;
    min-height:130px;
}

button{
    width:100%;
    background:#25D366;
    color:white;
    border:none;
    padding:15px;
    font-size:18px;
    border-radius:8px;
    cursor:pointer;
    font-weight:bold;
    transition:0.3s;
}

button:hover{
    background:#1ebe5d;
}

.nota{
    text-align:center;
    margin-top:15px;
    font-size:14px;
    color:#666;
}