.form_reg{
    max-width: 770px;
    width: 90%;
    margin: 0 auto;
    padding: 20px;
    background-color: #ffffffc4;
    border: 1px solid #d0d0d0;
    border-radius: 5px;
    margin-bottom: 20px;
}

.form_reg form {
    margin-top: 30px;
}

#error_pass {
    margin-top: -10px;
}