.container {
    margin-top: 10%;
    height: 100%;
    width: 100%;
}

div.row.mt-4.sub-btn{
    text-align: center;
}

.btn-primary{
    width: 15%;
}

@media screen and (max-width: 992px) {

    div.row:nth-child(2) > div:nth-child(1) > h1:nth-child(1){
        font-size: 5.5rem;
    }

    #customerPassword, #customerEmail,#customerName,
    #customerCarMake,
    #customerPhone,
    #confirmPassword,
    .form-check, .btn-primary{
        height: 100px;
        width: 100%;
    }

    #customerCarModel,
    #customerCarLicensePlate{
        height: 100px;
        width: 100%;
    }


    #customerPassword,
    #confirmPassword,
    #customerEmail,#customerName,
    #customerCarMake,
    #customerPhone,
    #customerCarModel,
    #customerCarLicensePlate,
    .form-check, .btn-primary{
        font-size: xx-large;
    }

    .form-check-input{
        width: 30px;
        height: 30px;
    }

    #checkBoxSpan{
        margin-left: 20px;
    }

}


#customerName::placeholder,
#customerPhone::placeholder,
#customerPassword::placeholder,
#confirmPassword::placeholder,
#customerEmail::placeholder,
#customerCarMake::placeholder,
#customerCarModel::placeholder,
#customerCarLicensePlate::placeholder
{ /* Chrome, Firefox, Opera, Safari 10.1+ */
    color: darkgrey;
    opacity: 1; /* Firefox */
}

#customerName:-ms-input-placeholder,
#customerPhone:-ms-input-placeholder,
#customerPassword:-ms-input-placeholder,
#confirmPassword:-ms-input-placeholder,
#customerEmail:-ms-input-placeholder,
#customerCarMake:-ms-input-placeholder,
#customerCarModel:-ms-input-placeholder,
#customerCarLicensePlate:-ms-input-placeholder
{ /* Internet Explorer 10-11 */
    color: lightgrey;
}

#customerName::-ms-input-placeholder,
#customerPhone::-ms-input-placeholder,
#customerPassword::-ms-input-placeholder,
#confirmPassword::-ms-input-placeholder,
#customerEmail::-ms-input-placeholder,
#customerCarMake::-ms-input-placeholder,
#customerCarModel::-ms-input-placeholder,
#customerCarLicensePlate::-ms-input-placeholder
{ /* Microsoft Edge */
    color: lightgrey;
}