const char css[] PROGMEM = R"rawliteral(
body {
    font-family: Arial;
    margin: 5px auto;
    padding: 30px;
}

li {
    cursor: pointer;
}

.play-button {
  border: 0;
  background: transparent;
  box-sizing: border-box;
  width: 0;
  margin: 5%;
  height: 74px;
  border-color: transparent transparent transparent grey;
  transition: 100ms all ease;
  cursor: pointer;
  border-style: solid;
  border-width: 37px 0 37px 60px;
  margin-right: 10%;
  margin-left: 10%;
  margin-top: 5%;
  margin-bottom: 5%;
}
.play-button.paused {
  border-style: double;
  border-width: 0px 0 0px 60px;
  height: 74px;
}
 .play-button:hover {
  border-color: transparent transparent transparent darkgrey;
}

.next-button {
  background: transparent;
  padding: 0; 
  margin: -6px;
  border-style: solid;
  border-width: 18px 0 18px 30px;
  border-color: transparent grey transparent grey;
  box-shadow: 10px 0 0 0 grey;
}

.next-button:hover {
  border-color: transparent darkgrey transparent darkgrey;
  box-shadow: 10px 0 0 0 darkgrey;
}

.prev-button {
  background: transparent;
  padding: 0; 
  margin: 0;
  border-style: solid;
  border-width: 18px 30px 18px 0;
  border-color: transparent grey transparent grey;
  box-shadow: -10px 0 0 0 grey;
}

.prev-button:hover {
  border-color: transparent darkgrey transparent darkgrey;
  box-shadow: -10px 0 0 0 darkgrey;
}

.slider {
  width: 80%;
}

)rawliteral";