Form Fitting TextArea - html

Question

I am working on a project where I want the user on a website to be able to input text into w3-cells.
I am using w3 cells because they automatically change shape to fit the page, but I am having issues making a textArea to automatically change shape with the layout.
It seems to me that the HTML is not even being changed by the CSS, but I cannot find any bugs in my code :/.
Note: The CSS for the textArea of the ideaText works fine; my problem is with the bodyCells.
HTML:
<div id="top">
<div id="idea">
<textArea id="ideaText" placeholder="Introduce your topic here...">
</textArea>
</div>
<div id="body">
<div class="w3-cell-row" id="bodyCells">
<div id="evidence1" class="w3-container w3-red w3-cell">
<textArea placeholder = "Write some stuff...">
</textArea>
</div>
<div id="evidence2" class="w3-container w3-green w3-cell">
<textArea></textArea>
</div>
<div id="evidence3" class="w3-container w3-yellow w3-cell">
<textArea></textArea>
</div>
<div id="evidence4" class="w3-container w3-blue w3-cell">
<textArea></textArea>
</div>
<div id="evidence5" class="w3-container w3-purple w3-cell">
<textArea></textArea>
</div>
</div>
</div>
CSS:
#idea{
background: #b35900;
height: 150px;
}
textArea#ideaText{
background: rgba(0,0,0,0.2);
width: 100%;
height: 150px;
font-size: 28px;
}
textArea#bodyCells{
background: rgba(0,0,0,0.2);
width: 100%;
height: 150px;
font-size: 28px;
}
.w3-cell-row#bodyCells{
height: 150px;
}

Answer 1

You have wrong css selector, which don't "catch" the html elements you want. There is no textArea#bodyCells in your html. textArea#bodyCells search for <textArea id="bodyCells">, which don't exists in you view. This is why it looks like css is not working at all for that element.
Btw, I advice you to only use classes (without ids) in css selectors. Simpler selectors will be easier to maintain and develop. :)

Answer 2

It's just a tiny mistake in the order of the selectors.
What you've typed:
textArea#bodyCells{}
What it should be:
#bodyCells textArea{}
Here's your code working just as you want it to... I hope.
:)