Center content over full screen slick slider - html

Question

I'm trying to center content over a fullscreen slick slider (kenwheeler.github.io/slick/),
I've attempted to use a flex box but the content remains at the edge of the viewport, which appears to be an issue with the position tag of the slick css but I can't figure out what I'm doing wrong.
It's my first time working with flex so maybe I'm missing something?
Website live here
HTML
<div class="wrapper">
<div class="main">
<img class="logo" src="img/logo.png">
<h1>XXXXXX</h1>
<h2>XXXX is a collaboration between XXXX & XXXX</h2>
</div>
<div class="background">
<div class="slide" style="background: url('bg/hlg1.jpg') no-repeat center center"></div>
<div class="slide" style="background: url('bg/hlg2.jpg') no-repeat center center"></div>
<div class="slide" style="background: url('bg/hlg3.jpg') no-repeat center center"></div>
<div class="slide" style="background: url('bg/hlg4.jpg') no-repeat center center"></div>
</div>
CSS
*{
min-height: 0;
min-width: 0;
cursor: crosshair;
}
html{
height: 100%;
min-height: 100%;
}
body{
font-family: sans-serif, "Helvetica", "Arial";
font-weight: bold;
font-size: 62.5%;
color: #fff;
text-align: center;
height: 100%;
margin: 0;
padding: 0;
width: 100%;
background: #000;
min-height: 100%;
overflow: hidden;
}
.wrapper {
height: 100%;
display: flex;
align-items: center;
justify-content: center;
}
.slide {
height: 100%;
width: 100%;
background-size: cover !important;
}
.background {
height: 100%;
width: 100%;
z-index: 0;
}
.slick-list,
.slick-track {
height: 100%;
}
.slick-prev {
position: fixed;
left: 2vw;
height: 4vh;
width: 3vw;
z-index: 2;
}
.slick-next {
position: fixed;
right: 2vw;
height: 4vh;
width: 3vw;
z-index: 2;
}
.slick-slider {
margin-bottom: 0;
}
.arrow:hover {
cursor: crosshair;
}
.main {
flex: none;
top: 3vh;
z-index: 1;
max-width: 50%;
position: absolute;
}
.logo {
width: 25vw;
margin: auto;
}

Answer 1

Since that element (main) stays there all the time, you can use these settings:
.main {
position: fixed;
top: 50%;
left: 50%;
transform: translateX(-50%) translateY(-50%);
z-index: 1;
}