Make child full height of parent and vertically center text - html

Question

I want to display a number and 2 text areas in a row.
The number should be in a "box" , with the background the height of the row and the number it's self should be vertically and horizontally centered in the "box".
I know I could do something like position: absolute; top: 0, left: 0 on the .number but this brings it out of the document flow. and the text, actual number does not get centered.
* {
box-sizing: border-box;
}
.container {
width: 40%;
}
.number {
background: skyblue;
/*position: absolute;*/
top: 0;
bottom: 0;
vertical-align: middle;
}
.row > div {
display: inline-block;
vertical-align: top;
}
.row {
background: lightgreen;
position: relative;
}
<div class="container">
<div class="row">
<div class="number">10</div>
<div class="textArea">
<div class="companyName">Top title</div>
<div class="industry">secondary text</div>
</div>
</div>
</div>
EDIT 1: You can see in the snippet that the box is not the full height of the container. That is not what I want.
EDIT 2: I guess you could cheat by using gradient but then I would have to make sure that the text area matches up to where the number box end to make the gradient look like the color is for the number "box".

Answer 1

Use flex display: table-cell
Update 1: show how to create "margin" wíthout using cell padding
Update 2: show a progressive enhancement to use flex when available
*{
box-sizing: border-box;
}
.container {
width: 40%;
}
.number{
background: skyblue;
}
.row > div {
display: table-cell;
vertical-align: middle;
}
.row {
background: lightgreen;
position: relative;
}
/* 3 ways to create a left margin on textArea */
.row .textArea.nr1 { border-left: 10px solid transparent; }
.row .textArea.nr2 { position: relative; left: 10px; }
.row .textArea.nr3 { padding-left: 10px; }
/* feature detect - use flex when available */
#supports (display: flex) {
.row > div {
display: block;
}
.row {
display: flex;
}
.row .number {
display: flex;
align-items: center;
}
}
<div class="container">
<div class="row">
<div class="number">10</div>
<div class="textArea nr1">
<div class="companyName">Top title</div>
<div class="industry">secondary text</div>
</div>
</div>
</div>
<div class="container">
<div class="row">
<div class="number">10</div>
<div class="textArea nr2">
<div class="companyName">Top title</div>
<div class="industry">secondary text</div>
</div>
</div>
</div>
<div class="container">
<div class="row">
<div class="number">10</div>
<div class="textArea nr3">
<div class="companyName">Top title</div>
<div class="industry">secondary text</div>
</div>
</div>
</div>

Answer 2

You can use flexbox to achieve that, all modern browsers support it, and with prefixes it also works on IE10.
* {
box-sizing: border-box;
}
.container {
width: 40%;
}
.row {
background: lightgreen;
display: flex;
}
.number {
background: skyblue;
display: flex;
align-items: center;
}
<div class="container">
<div class="row">
<div class="number">10</div>
<div class="textArea">
<div class="companyName">Top title</div>
<div class="industry">secondary text</div>
</div>
</div>
</div>
Or, use CSS table making it to work on legacy browsers too.
* {
box-sizing: border-box;
}
.container {
width: 40%;
}
.row {
background: lightgreen;
display: table;
width: 100%;
}
.number,
.textArea {
display: table-cell;
}
.number {
background: skyblue;
white-space: nowrap;
vertical-align: middle;
}
.textArea {
width: 100%;
}
<div class="container">
<div class="row">
<div class="number">10</div>
<div class="textArea">
<div class="companyName">Top title</div>
<div class="industry">secondary text</div>
</div>
</div>
</div>

Answer 3

*{
box-sizing: border-box;
}
.container{
width: 40%;
}
.number{
background: skyblue;
/*position: absolute;*/
top: 0;
bottom: 0;
vertical-align: middle;
height: 40px;
padding-top: 11px;
}
.row > div{
display: inline-block;
vertical-align: top;
}
.row{
background: lightgreen;
position: relative;
}
<div class="container">
<div class="row">
<div class="number">10</div>
<div class="textArea">
<div class="companyName">Top title</div>
<div class="industry">secondary text</div>
</div>
</div>
</div>