Random "text" scroll at bottom of page

Hi all,

I just noticed that there is a white "Scroll" link in text added to the bottom of my cover page. The "Scroll" link appears & disappears as you scroll, and clicking it sends me to the bottom of my page. My cover page was created from a blank page.

Below is the custom CSS I have injected to my site and a screenshot of what it looks like when I hover over a button at the bottom of my page. 

Can anyone please advise?

TIA!

Design > Custom CSS

.markdown-block p {
  margin-left:1.5em;
}
.markdown-block .ui-closed:before {
  font-family:monospace;
  content:"+ ";
}

.markdown-block .ui-open:before {
  font-family:monospace;
  content:"- ";
}

form .select optgroup {

  display : none;
  
  }

.Footer-middle {
    display: none;
}
div#footerBlocksTop {
    display: none !important;
}
.Footer-top {
    display: none !important;
}

Settings >Advanced > Code Injection (Header)

<script src="//ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script><script>
$(document).ready(function(){
$('.markdown-block .sqs-block-content h3').addClass('ui-closed').css('cursor','pointer');
$(".markdown-block .sqs-block-content h3").nextUntil("h3").slideToggle();
$(".markdown-block .sqs-block-content h3").click(function() {

$(this).nextUntil("h3").slideToggle();
$(this).toggleClass('ui-closed ui-open');
});
});
</script>

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