form.form-contato {
    margin: 20px 4px 50px 4px;
}
.form-contato input, .form-contato textarea {
    width: 100%;
    padding: 10px;
    max-width: 650px;
    margin: 4px 0;
}

button.btctt1 {
    display: block;
    width: 100%;
    padding: 10px;
    max-width: 650px;
    border: none;
    background: #aaa;
    color: #fff;
    font-size: 20px;
    font-weight: 500;
}
button.btctt1:hover {
    background: #7c7c7c;
}
form.form-contato span {
    color: #c40000;
    font-weight: 900;
    margin-left: 4px;
}