back-to-top.css

/* @media screen and (min-width: 1023px) { */
.button {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background-color: rgba(33, 37, 41, 255);
  border: none;
  font-weight: 400;
  display: flex;
  align-items: center;
  justify-content: center;

  cursor: pointer;
  transition-duration: 0.3s;
  overflow: hidden;
  position: fixed;
  bottom: 30px;
  right: 30px;
  visibility: hidden;
  opacity: 0;

  transition: border-radius 0.7s linear, width 0.5s ease-in-out,
    opacity 0.5s ease-in-out, visibility 0.5s ease-in-out;
}

.svgIcon {
  width: 12px;
  transition-duration: 1s;
}

.svgIcon path {
  fill: white;
}

.button:hover {
  width: 100px;
  border-radius: 10px;
  transition-duration: 0.3s;
  background-color: rgba(33, 37, 41, 255);
  align-items: center;
}

.button:hover .svgIcon {
  /* width: 20px; */
  transition-duration: 0.3s;
  transform: translateY(-200%);
}

.button::before {
  position: absolute;
  bottom: -20px;
  content: "Back to Top";
  color: white;
  transition-duration: 0.3s;
  font-size: 0px;
  cursor: pointer;
}

.button:hover::before {
  font-size: 13px;
  opacity: 1;
  bottom: unset;
  /* transform: translateY(-30px); */
  transition-duration: 0.4s;
}

.visible {
  visibility: visible;
  opacity: 1;
}