Styling for my popup contact form

Hi there,

I was trying to style my popup contact form when click button named “Get A Free Quote”, please see the screenshot link:

https://drive.google.com/open?id=1kucbzeZc4WyHfBD3uBsG8RSzv5M80bBK
https://drive.google.com/open?id=11wEDlwZAfZjQ9pWZ0bHXE9hAZ1VlCYIo

I use CSS code as below, but it didn’t work. Could you help me out?

`/*Styling Contact Us Form*/
#test-popup.white-popup {
position: relative;
background: #fff;
padding: 20px;
width: auto;
max-width: 1000px;
margin: 20px auto;
}

textarea.wpcf7-textarea {
background: #DDDFE2!important;
border-radius: 5px!important;
color: #000!important;
}
input.wpcf7-text {
background: #DDDFE2!important;
border-radius: 5px!important;
color: #000!important;
}

input.wpcf7-submit {
border-radius: 5px!important;
font-size: 20px;
background-color: #c3512f;
color: #ffffff;
border-color: #a1300d;
}