I have 3 <a> with the btn bootstrap class on it.
I discovered a way to center them both horizontally and vertically using the code below:
HTML
<div class="row row-centered ">
<div class="vertically-centered">
<div class="col-xs-12 col-sm-12">
<a class="btn btn-lg btn-default btn-primary col-centered col-xs-3 col-sm-3 col-md-3" href="#">Prepare</a>
<a class="btn btn-lg btn-default btn-primary col-centered col-xs-3 col-sm-3 col-md-3" href="#" style="margin-left: 100px; margin-right: 100px;">Handover</a>
<a class="btn btn-lg btn-default btn-primary col-centered col-xs-3 col-sm-3 col-md-3" href="#">Tuto</a>
</div>
</div>
</div>
CSS
.btn-lg{
padding-top: 50px;
padding-bottom: 50px;
padding-left: 10px;
padding-right:10px;
}
.row-centered {
text-align: center;
position: absolute;
top: 0;
bottom: 0;
left: 0;
right: 0;
font: 0/0 a;
}
.row-centered:before {
content: ' ';
display: inline-block;
vertical-align: middle;
height: 100%;
}
.vertically-centered {
vertical-align: middle;
display: inline-block;
width: 100%;
}
.col-centered {
display: inline-block;
float: none;
}
The arrangement functions correctly when the screen has sufficient width. https://i.sstatic.net/dRqWl.png
However, the layout fails on screens narrower than 830px in width. https://i.sstatic.net/e84fn.png
EDIT
I made modifications to the HTML and CSS for better responsiveness.
MODIFIED HTML
<div class="row row-centered ">
<div class="vertically-centered">
<div class="col-xs-12 col-sm-4 col-md-4">
<a class="btn btn-lg btn-default btn-primary" href="#">Prepare</a>
</div>
<div class="col-xs-12 col-sm-4 col-md-4">
<a class="btn btn-lg btn-default btn-primary" href="#">Handover</a>
</div>
<div class="col-xs-12 col-sm-4 col-md-4">
<a class="btn btn-lg btn-default btn-primary" href="#">Tuto</a>
</div>
</div>
</div>
MODIFIED CSS
.btn-lg{
padding-top:30px;
padding-bottom:30px;
width:100%;
}
.row-centered {
text-align: center;
position: absolute;
top: 0;
bottom: 0;
left: 0;
right: 0;
font: 0/0 a;
}
.row-centered:before {
content: ' ';
display: inline-block;
vertical-align: middle;
height: 100%;
}
.vertically-centered {
vertical-align: middle;
display: inline-block;
width: 100%;
}
.col-centered {
display: inline-block;
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