CSS: How to align a division with the center of another division? - html

Question

I am new for web design. I am trying to making a box including an icon and a link. When the screen is laptop, the link should be in the left of the icon and align with its center vertically; when screen is tablet and mobile phone, the icon should be under the bottom of the icon and align with its center horizontally. And the icon is much bigger than the link. Here are the code and images links:
<div class="box">
<div class="row">
<div class="col-xs-12 col-sm-12 col-md-6">
<span class="info-box-icon"><i class="mega-octicon octicon-server"></i></span>
</div>
<div class="col-xs-12 col-sm-12 col-md-6">
<a class="side-box-link" href="workflow-summary" style="vertical-align:middle;">Work Flow</a>
</div>
</div>
</div>
image links:
bg and md:
http://ww3.sinaimg.cn/bmiddle/77f9deafgw1evmq9c8z5tj206703amx6.jpg
sm and xs:
http://ww3.sinaimg.cn/bmiddle/77f9deafgw1evmq9cxdttj2045041gll.jpg
I've tried many method but still cannot make the link align with the icon's center vertically, and the link is always align in top of the box. The methods I've tried:
Use table, and set the icon and link as two table data: they can align as
what I want, but since they are two column, the link cannot move
down when the screen size change.
Use table, put them in same line: align in the box top.
Use list: align in the box top.
Use margin in CSS: align well in md and bg screen but the icon and
link will have gap in sm and xs as well.
Use "vertical-align:middle" in CSS: just not working
What should I do? Any advice will be appreciate, thank you!

Answer 1

You can use Flexbox, there is a nice guide here A Complete Guide to Flexbox
Also take a look at this this example I made for you, hope it can help you out.
Html code:
<div class="box">
<div class="row">
<div class="icon">
<span class="info-box-icon"><i class="mega-octicon octicon-server"></i></span>
</div>
<div class="link">
<a class="side-box-link" href="workflow-summary" style="vertical-align:middle;">Work Flow</a>
</div>
</div>
And this is the CSS:
.row {
display: flex;
align-items: center;
}
.icon {
width: 200px;
height: 200px;
background-color: salmon ;
}
.link{
padding: 10px;
}
a {
text-decoration: none;
}
#media (max-width: 450px) {
.row {
flex-direction: column;
}
}
I did use fixed sizes with the icon to illustrate, but it'll work with any size.
Take a look at this live example JSFiddle Flex Example