Currently, I am learning how to use Bootstrap and attempting to replicate the example themes found on their official website. The specific theme I am focusing on is available at this link: https://getbootstrap.com/docs/4.3/examples/pricing/
Unfortunately, the pricing cards that I have created are not behaving the same way as the examples provided by Bootstrap. I have shared the code below for reference.
I would appreciate it if someone could shed some light on why my price cards are expanding individually in width when the screen size changes, whereas the Bootstrap versions maintain a consistent width and height.
Thank you for any assistance!
<link href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css" rel="stylesheet"/>
<div class="container">
<div class="card-deck mb-3 text-center">
<!--Price Section-->
<div class="card mb-4 shadow-sm">
<div class="card-header">
<h4 class="my-0 font-weight-normal">Free</h4>
</div>
<div class="card-body">
<div class="card-title">
<h1>$0 <small class="text-muted">/ mo</small></h1>
</div>
<ul class="card-text list-unstyled mt-3 mb-4">
<li>10 users included</li>
<li>2 GB of storage</li>
<li>Email Support</li>
<li>Help Center Access</li>
</ul>
<button type="button" class='btn btn-lg btn-block btn-outline-
primary'>Sign Up</button>
</div>
</div>
<!--Price End-->
<!--Price Two-->
<div class="card mb-4 shadow-sm">
<div class="card-header">
<h4 class="my-0 font-weight-normal">Free</h4>
</div>
<div class="card-body">
<div class="card-title">
<h1>$15 <small class="text-muted">/ mo</small></h1>
</div>
<ul class="card-text list-unstyled mt-3 mb-4">
<li>10 users included</li>
<li>2 GB of storage</li>
<li>Email Support</li>
<li>Help Center Access</li>
</ul>
<button type="button" class='btn btn-lg btn-block btn-
primary'>Sign Up</button>
</div>
</div>
<!--Price End-->
<!--Price Three-->
<div class="card mb-4 shadow-sm">
<div class="card-header">
<h4 class="my-0 font-weight-normal">Free</h4>
</div>
<div class="card-body">
<div class="card-title">
<h1>$29 <small class="text-muted">/ mo</small></h1>
</div>
<ul class="card-text list-unstyled mt-3 mb-4">
<li>10 users included</li>
<li>2 GB of storage</li>
<li>Email Support</li>
<li>Help Center Access</li>
</ul>
<button type="button" class='btn btn-lg btn-block btn-
primary'>Sign Up</button>
</div>
</div>
<!--Price End-->
</div>