<div class="demo-wrap">
<div id="demo-header" class="demo-header">
What does the word “mare” in 'nightmare' mean?
</div>
<div id="demo-content" class="demo-content">
<div class="demo-text">
The word “mare” refers to a female goblin that sits on you, suffocates you while you sleep, entangles her hair around you, and tries to induce bad thoughts.
</div>
</div>
<div class="demo-content-sub">
<p><i class="fa-solid fa-person-circle-question fa-4x"></i></p>
<p>click on the header to show or hide the answer</p>
</div>
</div>

.demo-container {
  position: relative;
  margin: 0 auto;
  max-width: 500px;
  min-height: 240px;
}

.demo-content {
  display: none;
  background-color: rgba(255, 255, 255, 0.92);
  position: absolute;
  padding: 16px 0;
  border-bottom-right-radius: 6px;
  border-bottom-left-radius: 6px;
  z-index: 1;
}

.demo-text {
padding: 1em;
}

.demo-content-sub {
  padding: 0.5em 1em;
  text-align: center;
  border: 1px solid rgba(255, 255, 255, 0.65);
  border-bottom-right-radius: 6px;
  border-bottom-left-radius: 6px;
}

.demo-header {
  position: relative;
  padding: 10px 20px;
  background-color: #525252;
  color: #FFFFFF;
  border-top-right-radius: 6px;
  border-top-left-radius: 6px;
  cursor: pointer;
}

.demo-header::after {
  position: absolute;
  content: "\f0ab";
  font-family: FontAwesome;
  font-size: 16px;
  color: #F0F0F0;
  right: 6px;
}

.demo-header-close::after {
  position: absolute;
  content: "\f0aa";
  font-family: FontAwesome;
  font-size: 16px;
  color: #CCCCCC;
  right: 6px;
}

$(document).ready(function() {
 $("#demo-header").click(function() {
 
$(this).next("#demo-content").slideToggle("slow");
$(this).toggleClass("demo-header-close");

 });
});