main p {
  line-height: 1.6;
  margin: 2em 0;
}

@media only screen and (min-width: 1024px) {
  main p {
    font-size: 2rem;
  }
}

.cd-top {
  z-index: 999999999;
  display: inline-block;
  height: 40px;
  width: 40px;
  position: fixed;
  bottom: 10px;
  right: 10px;
  

  /* image replacement properties */
  overflow: hidden;
  text-indent: 100%;
  white-space: nowrap;
  background: url(images/uparrow.svg) no-repeat center 50%;
   background-size: 40px 40px; 
  visibility: hidden;
 
  
     opacity: 0.5;
   transition: opacity .2s ease-in-out;
   -moz-transition: opacity .2s ease-in-out;
   -webkit-transition: opacity .2s ease-in-out;
  
}

.cd-top.cd-top--show,
.cd-top.cd-top--fade-out,
.cd-top:hover {
  -webkit-transition: opacity .3s 0s, visibility 0s 0s, background-color .3s .3s;
  transition: opacity .3s 0s, visibility 0s 0s, background-color .3s .3s;
}

.cd-top.cd-top--show {
  /* the button becomes visible */
  z-index: 999999999;
  visibility: visible;
  opacity: 1;
}

.cd-top.cd-top--fade-out {
  /* if the user keeps scrolling down, the button is out of focus and becomes less visible */
  opacity: .5;
}

.cd-top:hover {
    opacity: 0.75;
    }

@media only screen and (min-width: 768px) {
  .cd-top {
    z-index: 999999999;
    right: 20px;
    bottom: 20px;
  }
}

@media only screen and (min-width: 1024px) {
  .cd-top {
    z-index: 999999999;
    height: 60px;
    width: 60px;
    right: 30px;
    bottom: 30px;
  }
}