How to make notification box float in the center - css

Question

Using Bulma css framework, I try to make the notification box popup at about the center of the page, without interrupting existing data (it is a notification that pops for 3 seconds and then it should disappear). For example: 2 images on top of each other(snippet 1), and I want the notification box to float on top of them without pushing any content(snippet 2)
<link href="https://cdnjs.cloudflare.com/ajax/libs/bulma/0.7.1/css/bulma.min.css" rel="stylesheet" />
<div class="container">
<div class="level main">
<div class="level-item">
<figure class="image is-128x128">
<img src="https://bulma.io/images/placeholders/128x128.png">
</figure>
</div>
</div>
</div>
<div class="container">
<div class="level main">
<div class="level-item">
<figure class="image is-128x128">
<img src="https://bulma.io/images/placeholders/128x128.png">
</figure>
</div>
</div>
</div>
<link href="https://cdnjs.cloudflare.com/ajax/libs/bulma/0.7.1/css/bulma.min.css" rel="stylesheet" />
<div class="container">
<div class="level main">
<div class="level-item">
<figure class="image is-128x128">
<img src="https://bulma.io/images/placeholders/128x128.png">
</figure>
</div>
</div>
<div class="notification is-primary">
<button class="delete"></button> Primar lorem ipsum dolor sit amet, consectetur adipiscing elit lorem ipsum dolor. <strong>Pellentesque risus mi</strong>, tempus quis placerat ut, porta nec nulla. Vestibulum rhoncus ac ex sit amet fringilla. Nullam
gravida purus diam, et dictum <a>felis venenatis</a> efficitur. Sit amet, consectetur adipiscing elit
</div>
</div>
<div class="container">
<div class="level main">
<div class="level-item">
<figure class="image is-128x128">
<img src="https://bulma.io/images/placeholders/128x128.png">
</figure>
</div>
</div>
</div>

Answer 1

Simply give the notification position: absolute along with a z-index which is higher than the element you want it to sit on top of (1 will likely work fine):
.notification.is-primary {
position: absolute;
z-index: 1;
}
<link href="https://cdnjs.cloudflare.com/ajax/libs/bulma/0.7.1/css/bulma.min.css" rel="stylesheet" />
<div class="container">
<div class="level main">
<div class="level-item">
<figure class="image is-128x128">
<img src="https://bulma.io/images/placeholders/128x128.png">
</figure>
</div>
</div>
<div class="notification is-primary">
<button class="delete"></button> Primar lorem ipsum dolor sit amet, consectetur adipiscing elit lorem ipsum dolor. <strong>Pellentesque risus mi</strong>, tempus quis placerat ut, porta nec nulla. Vestibulum rhoncus ac ex sit amet fringilla. Nullam
gravida purus diam, et dictum <a>felis venenatis</a> efficitur. Sit amet, consectetur adipiscing elit
</div>
</div>
<div class="container">
<div class="level main">
<div class="level-item">
<figure class="image is-128x128">
<img src="https://bulma.io/images/placeholders/128x128.png">
</figure>
</div>
</div>
</div>

Answer 2

I created a CSS rule like:
.top-of-the-world{
position: absolute !important;
z-index: 100 !important;
}
That way I do not alter Bulma's rules.
Then I added the class top-of-the-world to my notification
.notification.top-of-the-world