.sliderElements,
.sliderElements figure,
.sliderControls {
    margin: 0;
}
 
.sliderElements:after {
  content: ".";
  display: block;
  height: .1px;
  clear: both;
  visibility: hidden;
  font-size: 0;
  overflow: hidden;
}
 
.cssSlider {
  overflow-x: hidden;
  position: relative;
}

.sliderElements {
  list-style: none;
  position: relative;
  left: 0;
  width: 400%;
  display: inline-block;
  padding: 0;
  -webkit-transition: left .8s ease-in-out;
  -moz-transition: left .8s ease-in-out;
  -o-transition: left .8s ease-in-out;
  transition: left .8s ease-in-out;
}
 
.sliderElements > li {
  float: left;
  width: 25%;
  position: relative;
}

#image01 {
  height: 300px;
  width: 100%;
  background: url(../resources/slide01.jpg) no-repeat center;
  background-size: cover;
}

#image02 {
  height: 300px;
  width: 100%;
  background: url(../resources/slide02.jpg) no-repeat center;
  background-size: cover;
}

#image03 {
  height: 300px;
  width: 100%;
  background: url(../resources/slide03.jpg) no-repeat center;
  background-size: cover;
}

#image04 {
  height: 300px;
  width: 100%;
  background: url(../resources/slide04.jpg) no-repeat center;
  background-size: cover;
}
 
#slide02:checked ~ .sliderElements {
    left: -100%;
}
 
#slide03:checked ~ .sliderElements {
    left: -200%;
}
 
#slide04:checked ~ .sliderElements {
    left: -300%;
}
 
/* Bilder responsive */
.sliderElements img {
    width: 100%;
    height: 300px;
}
 
 
/* inputs aus dem Blickfeld schieben */
.cssSlider input {
    position: absolute;
    left: -99999px;
}
 
/* mittige Ausrichtung der Controls - funktioniert im Zusammenspiel mit inline-block */
.sliderControls {
    text-align: center;
    position: absolute;
    top: 85%;
    z-index: 1;
    left: 0%;
    right: 0%;
}
 
/* Controls nebeneinander bringen */
.sliderControls li {
    display: inline-block;
}
 
/* Controls auf einheitliche Maße bringen und die Ecken abrunden */
.sliderControls label {
    width: 20px;
    height: 20px;
    line-height: 20px;
    text-align: center;
    border-radius: 50%;
    display: block;
    cursor: pointer;
    background: #ddd;
    color: #ddd;
    transition: all 0.25s ease;
}
 
/* Attributselektor und indirekter Nachfahrkombinator zum ansteuern der labels */
.sliderControls label:hover,
#slide01:checked ~ .sliderControls label[for="slide01"],
#slide02:checked ~ .sliderControls label[for="slide02"],
#slide03:checked ~ .sliderControls label[for="slide03"],
#slide04:checked ~ .sliderControls label[for="slide04"] {
    background: var(--accent);
    color: var(--accent);
}

.slide-button {
  position: absolute;
  z-index: 1;
  top: 35%;
  height: 80px;
  width: 60px;
  background-color: var(--tbg);
  backdrop-filter: blur(10px);
  border: 2px solid var(--bg);
  font-size: 60px;
  color: white;
  transition: all 0.25s ease;
  display: flex;
  justify-content: center;
  align-items: center;
}

.slide-button:active {
  color: var(--accent);
  width: 50px !important;
}

.slide-button-l {
  left: 0%;
  border-bottom-right-radius: 20px;
  border-top-right-radius: 20px;
  border-left: 0;
}

.slide-button-l:hover {
  width: 70px;
}

.slide-button-r {
  right: 0%;
  border-bottom-left-radius: 20px;
  border-top-left-radius: 20px;
  border-right: 0;
}

.slide-button-r:hover {
  width: 70px;
}