floating button not on top of sections

Hi all, 

We have added a floating button based on some code snippets on the forum, all works except for the position - it is covered by some sections when scrolling (we tried setting z-position to different numbers but none worked).

Can somebody please advise?

Thank you!

Code on page:

<a href="https://www.newtonenergy.nl/how-to-preorder" class="sqs-block-button-element sqs-block-button-element" id="back-to-top">Pre-order now!</a>

Code in CSS:

#back-to-top{
position:fixed!important;
  top:50%!important; 
  right:0!important; 
 z-index: 99999!important;
  transform: translateY(-50%);
font-size: 1.1em;
background: #C42F35;
color: #fff;
text-transform: uppercase;
font-family: montserrat!important;
writing-mode: vertical-rl;
padding: 40px 20px;
}

20 hours ago, Ziggy said:

Where have you add this code to the page? Generally, the best place for this is at the very last section of the footer (if you want it on every page) or in the last section on the page (if you just want it on one page).

Thank you so much, moved it to the last section and it worked perfectly! Simple solution! 

3 hours ago, ZuzanaFENIX said:

Simple solution! 

These are my favourite type of solution!