The CSS editor in APEARANCE/CUSTOMIZE has disappeared.

I’m trying to center each text and button related to each image of this page:
cnorcreative.com/corbyssimas

I’m using the following css:

.pt-cv-readmore . btn .btn-success{

display: block;
margin: 0 auto;
margin-right: auto;

top: 50%;
transform: translate(0, 300%)

}

.pt-cv-title{
text-align: center;

padding-left: 40px;;
/* 2 /
top: 50%; / 3 */
transform: translate(0, 300%)
}

.pt-cv-content{

padding-left: 40px;
position: relative; /* 2 /
top: 50%; / 3 */
transform: translate(0, 100%)

}

.pt-cv-meta-fields{
text-align: center;

padding-left: 40px;
/* 2 /
top: 50%; / 3 */
transform: translate(0, 400%)

}

I’ve tried also with:

display: block;
margin: auto;

with no success.

What am I doing wrong?

Hi there !
I’m using MH Feminine Mag for my wife’s website and i can’t place a transparent header…i tried with ur previous answer but it doesn’t work…

Shoud i have to type like this in my style.css ?

/***** Header *****/
.mh-header { background: #ddc59f; opacity:0.2; }
.mh-header-tagline { color: #ac6a01; }

Thanks a lot !