transform-origin doesnt apply in safari

Question

Why doesn't transform-origin doesn't work in Safari?

Here, how it should look (Chrome): https://i.stack.imgur.com/CDkNF.png Here, how it looks in Safari: https://i.stack.imgur.com/3Zh1O.png

I already tried some stuff with percents but it my content divs are having different sizes, so it looks awkward.

Here's the JSFiddle. http://jsfiddle.net/2f4pferq/

text-align: right; -ms-transform: rotate(-90deg); -ms-transform-origin: right top; -webkit-transform: rotate(-90deg); -webkit-transform-origin: right top; transform: rotate(-90deg); transform-origin: right top;

Here's the code:

.verticaltext {
    position: absolute;
    top: 10px;
    left: 25px;
    transform: translateX(-100%);
    text-transform: uppercase;
}

.verticaltext_content {
    text-align: right;
    -ms-transform: rotate(-90deg);
    -ms-transform-origin: right top;
    -webkit-transform: rotate(-90deg);
    -webkit-transform-origin: right top;
    transform: rotate(-90deg);
    transform-origin: right top;
}

.content {
    background-color: #000;
    color: #FFF;
    margin-bottom: 25px;
    padding: 25px;
    width: 100%;
    min-height: 200px;
}

.content p {
    margin: 0px 0px 0px 30px;
}

.content ul {
    list-style-type: none;
    margin: 0;
    padding: 0;
}

.content a,
.content a:link,
.content a:visited {
    color: #FFF;
    -webkit-transition: all 0.2s ease-in-out;
    -moz-transition: all 0.2s ease-in-out;
    -o-transition: all 0.2s ease-in-out;
    transition: all 0.2s ease-in-out;
}

.content a:hover {
    color: #FFA500;
    -webkit-transition: all 0.2s ease-in-out;
    -moz-transition: all 0.2s ease-in-out;
    -o-transition: all 0.2s ease-in-out;
    transition: all 0.2s ease-in-out;
    text-decoration: none;
}

.content i.fa {
    color: #FFF;
    width: 15%;
}

.content i.fa:hover {
    color: #FFA500;
}

<div class="content">
  <div class="verticaltext">
    <h2 class="verticaltext_content">Diskografie</h2>
  </div>
 
  
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</div>

Answer 1

Your not vendor prefixing for the .verticaltext on your transform

.verticaltext {
  position: absolute;
  top: 10px;
  left: 25px;
  transform: translateX(-100%);
  text-transform: uppercase;
}

Should be

.verticaltext {
  position: absolute;
  top: 10px;
  left: 25px;
  -webkit-transform: translateX(-100%);
  -ms-transform: translateX(-100%);
  transform: translateX(-100%);
  text-transform: uppercase;
}