Stretch fixed to bottom parent div to div child's width - html

Question

So, I have a main container that shows like the following:
I want to be able to adapt the parent div to the number of child's it receives. Let's say we remove div2. The result should be something like this:
Instead, the parent div does not stretch to the width of the div child's
Here's my code:
HTML:
<div class="main-container">
<!-- Card container -->
<div class="card-container">
<div class="card">div1</div>
<div class="card">div2</div>
<div class="card">div3</div>
</div>
<!-- Footer container -->
<div class="footer">i am a footer</div>
</div>
CSS:
.main-container {
position: fixed;
margin: 0 auto;
left: 0;
right: 0;
bottom: 0;
width: 100%;
max-width: 400px;
box-shadow: 0 0 15px #B3B3B3;
border-top-left-radius: 3px;
border-top-right-radius: 3px;
text-align:center;
}
.card-container {
color: #3B3D3D;
height:105px;
float: left;
width: 100%;
}
.footer {
color: #FFFFFF;
background: #0095D3;
height: 45px;
float: left;
width: 100%;
}
.card {
width:100px;
float:left;
}
What am I doing wrong here? I've tried the display: inline-block; solutions out there but since the parent div must be fixed to the bottom, I am not seeing the desired result.
Any help will be precious.
Thanks in advance.

Answer 1

Try this https://jsfiddle.net/2Lzo9vfc/136/
You can try to remove one .card on click and see what hapens here https://jsfiddle.net/2Lzo9vfc/138/
CSS
.main-container {
position: fixed;
margin: 0 auto;
left: 50%;
bottom: 0;
box-shadow: 0 0 15px #B3B3B3;
border-top-left-radius: 3px;
border-top-right-radius: 3px;
text-align:center;
display: inline-block;
transform: translateX(-50%);
}
.footer {
color: #FFFFFF;
background: #0095D3;
height: 45px;
width: 100%;
}
.card {
width:100px;
height:105px;
display: inline-block;
}
HTML
<div class="main-container">
<div class="card">div1</div>
<div class="card">div2</div>
<div class="card">div3</div>
<div class="footer">i am a footer</div>
</div>

Answer 2

Here you go: http://codepen.io/n3ptun3/pen/PPgWNb
You don't need to use display: inline-block.
I've left your HTML alone, and simplified some of your CSS: .card-container and .footer don't need float: left; and width: 100%;. They are both block-level elements so they will take up 100% of the width, and they don't need anything to wrap around them.
On the .main-container, you can't set margin: 0 auto; and position: fixed;. position: fixed; removes the ability for centering via margin. left: 0; and right: 0; were stretching the size of the main container, so those need to be removed. width: 100%; and max-width: 400px; were trying to fix the width issue, but that wouldn't allow resizing based on content.
Instead you need to set left: 50%; (places left edge of element at 50% of the parent's width, i.e. the viewport width, in this case) and then transform: translate(-50%); to bring the element back toward the left by 50% of its width. Thus bringing the element to the center of the window/viewport.
Now, if you remove one of the "cards," it will resize the "main-container," while keeping everything fixed to the bottom and centered.
.main-container {
position: fixed;
bottom: 0;
left: 50%;
transform: translate(-50%);
box-shadow: 0 0 15px #B3B3B3;
border-top-left-radius: 3px;
border-top-right-radius: 3px;
text-align: center;
}
.card-container {
color: #3B3D3D;
height: 105px;
}
.card {
width: 100px;
float: left;
}
.footer {
color: #FFFFFF;
background: #0095D3;
height: 45px;
}
EDIT: Based on your new information (re: the increased width or added "cards"), I've found that the issue lies with the left position on the .main-container. When you position the element by 50% and its width is more than 50% of the parent, it runs into the right side of the parent div, and you get the stacking. To fix this, you can instead remove the float: left; on .card and add display: flex; on .card-container. This will allow you to increase the width of the "cards" while keeping them from stacking.
I've updated the code here: http://codepen.io/n3ptun3/pen/PPgWNb
.main-container {
position: fixed;
bottom: 0;
left: 50%;
transform: translate(-50%);
box-shadow: 0 0 15px #B3B3B3;
border-top-left-radius: 3px;
border-top-right-radius: 3px;
text-align: center;
}
.card-container {
color: #3B3D3D;
height: 105px;
display: flex;
}
.card {
width: 100px;
// float: left;
}
.footer {
color: #FFFFFF;
background: #0095D3;
height: 45px;
}