body {
  align-items: center;
  justify-content: center;
  cursor: url("mouse.png"), default;
}

#btn_area {
  width: 300px;
  padding-right: 60px;
  justify-content: space-around;
  position: fixed;
  margin: 350px 600px;
}

#music_bar {
  width: 400px;
  margin: 400px 600px;
  position: fixed;
}
.btn {
  justify-content: center;
  background-color: orange;
  font-family: "San-serif";
  font-weight: 800;
  padding: 6px;
  border-radius: 50%;
  border-color: black;
  border-width: 2px;
}

.slider {
  cursor: url("mouse.png"), default;
  -webkit-appearance: none;
  width: 100%;
  height: 15px;
  border-radius: 5px;
  background: #fff1cb;
  outline: none;
  -webkit-transition: 0.2s;
  transition: opacity 0.2s;
}

.slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 25px;
  height: 34px;
  border-radius: 20%;
  background: url("cheese.png");
}

.slider::-moz-range-thumb {
  width: 25px;
  height: 34px;
  border-radius: 20%;
  background: url("cheese.png");
  cursor: pointer;
}
.slider:hover {
  cursor: url("mouse.png"), default;
}