.instructions {
  position: fixed;
  align-items: flex-start;
  font-size: 1vw;
  margin: 4vw;
  top: 0;
  right: 0;
  border: 4px double black;
  padding: 0.5em;
}

.back {
  position: fixed;
  align-items: flex-start;
  font-size: 2vw;
  margin: 4vw;
  top: 0;
  left: 0;
  border: 4px double black;
  padding: 0.5em;
}

.rangeslider {
  width: 50vh;
  margin: 0 auto;
}

.myslider {
  -webkit-appearance: none;
  background: grey;
  width: 100%;
  height: 20px;
  opacity: 0.8;
  margin-top: 100px;
  z-index: 0;
}

.myslider::-webkit-slider-thumb {
  -webkit-appearance: none;
  cursor: pointer;
  background: black;
  width: 10%;
  height: 20px;
  z-index: 0;
}

.myslider:hover {
  opacity: 1;
}

.image {
  position: relative;
  width: 600px;
  margin: 0 auto;
  z-index: -1;
}

.image>img {
  position: absolute;
  display: none;
}

.image>img.visible,
.image>img:first-child {
  display: block;
}


a:link {
  text-decoration: none;
  color: black;
}

a:visited {
  text-decoration: none;
  color: black;
}

a:hover {
  text-decoration: underline;
}

a:active {
  text-decoration: underline;
}