index.css

img {
    max-width: 100%;
    max-height: 100%;
}

.questionButton {
  width: 30vh;
  height: 30vh;
  top: 30%;
  position: absolute;
  left: 50%;
  margin-left: -15vh;

  animation: buttonMoving 1s infinite linear;
}

@keyframes buttonMoving {
  0%    {
    width: 30vh;
    height: 30vh;
    margin-left: -15vh;
  }

  50%   {
    width: 28vh;
    height: 28vh;
    margin-left: -14vh;
  }

  100%  {
    width: 30vh;
    height: 30vh;
    margin-left: -15vh;
  }
}


.slidecontainer {
  position: absolute;
  width: 100%;
  top: 80%;
}

.slider {
  -webkit-appearance: none;
  width: 80%;
  margin-left: 10%;
  height: 2.5vh;
  background: #d3d3d3;
  outline: none;
  margin-bottom: 5vh;
}

.slider:hover {
  opacity: 1;
}

.slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 5vh;
  height: 5vh;
  cursor: pointer;
  box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.7), 0 6px 20px 0 rgba(0, 0, 0, 0.7);

}

.s-red::-webkit-slider-thumb {
  background: #FF0000;
}

.s-green::-webkit-slider-thumb {
  background: #00FF00;
}

.s-blue::-webkit-slider-thumb {
  background: #0000FF;
}

.errorContainer {
  width: 30vh;
  height: 30vh;
  top: 20%;
  position: absolute;
  left: 50%;
  margin-left: -15vh;
  text-align: center;
  font-size: 8vh;
  font-weight: bolder; 
}

.errorContainer p {
  margin-top: 0px;
}
.iconReversed {
  transform: rotate(180deg);
}