html {
  margin: 0;
  padding: 0;
  
}


body {
  margin: 0;
  margin-top:0;
  padding: 0;
  background-color: #68FF00;
  /* overflow: hidden; */
}


canvas {

  display: block;

}

.slider {
  -webkit-appearance: none;
  appearance: none;
  background-color: #ddd;
  outline: none;
  opacity: 0.7;
  -webkit-transition: .2s;
  transition: opacity .2s;
  /* Rotate the slider 90 degrees clockwise */
  width: 100px;
  height: 20px; /* Set height to the desired value */
}

.big-slider {
  appearance: none;
  background-color: #ddd;
  outline: none;
  opacity: 0.7;
  -webkit-transition: .2s;
  transition: opacity .2s;
  /* Rotate the slider 90 degrees clockwise */
  width: 200px;
  height: 50px; /* Set height to the desired value */

}

.hide-button {
  background-color: #000000; /* Solid black */
  color: #68FF00; 
  padding: 15px 15px;
  text-align: center;
  text-decoration: none;
  display: inline-block;
  font-family: 'Helvetica';
  font-size: 24px;
  font-family: Helvetica, Arial, sans-serif;
  border-radius: 40%;
  opacity: 0.8;
  transition: 0.3s;
}


.hide-button:hover {
  opacity: 1;
  transition: 0.3s;

}


.synth-button {
  background: #21130D;
  color: #68FF00;
  border-radius: 5px;
  padding: 15px 15px;
  text-align: center;
  text-decoration: none;
  display: inline-block;
  font-size: 12px;
  opacity: 0.9;
  transition: 0.3s;
  font-family: Helvetica, Arial, sans-serif;
  font-weight: bold;
}

.synth-button:hover {
  background-color: #000000;
  color: white;
  opacity: 1
}


.synth-button.active {
  background-color: #00FF00;
  color: white;
}

.track-button {
  background-color: #000000; /* Solid black */
  color: white; 
  padding: 15px 15px;
  text-align: center;
  text-decoration: none;
  display: inline-block;
  font-size: 28px;
  border-radius: 80%;
  opacity: 0.8;
  transition: 0.3s;
}

.track-button:hover {
  background-color: #000000;
  color: white;
  opacity: 1
}


.play-button {
  background-color: #000000; /* Warning Yellow */
  color:  #68FF00;
  padding: 15px 15px;
  text-align: center;
  text-decoration: none;
  display: inline-block;
  font-size: 32px;
  border-radius: 40%;
  font-family: Helvetica, Arial, sans-serif;
}



/* pulse wave */
.play-button:before {
  content: "";
  position: absolute;
  width: 150%;
  height: 150%;
  -webkit-animation-delay: 0s;
  animation-delay: 0s;
  -webkit-animation: pulsate1 2s;
  animation: pulsate1 2s;
  -webkit-animation-direction: forwards;
  animation-direction: forwards;
  -webkit-animation-iteration-count: infinite;
  animation-iteration-count: infinite;
  -webkit-animation-timing-function: steps;
  animation-timing-function: steps;
  opacity: 1;
  border-radius: 50%;
  border: 5px solid rgba(255, 255, 255, .75);
  top: -30%;
  left: -30%;
  background: rgba(198, 16, 0, 0);
}


@-webkit-keyframes pulsate1 {
  0% {
    -webkit-transform: scale(0.6);
    transform: scale(0.6);
    opacity: 1;
    box-shadow: inset 0px 0px 25px 3px rgba(255, 255, 255, 0.75), 0px 0px 25px 10px rgba(255, 255, 255, 0.75);
  }
  100% {
    -webkit-transform: scale(1);
    transform: scale(1);
    opacity: 0;
    box-shadow: none;

  }
}

@keyframes pulsate1 {
  0% {
    -webkit-transform: scale(0.6);
    transform: scale(0.6);
    opacity: 1;
    box-shadow: inset 0px 0px 25px 3px rgba(255, 255, 255, 0.75), 0px 0px 25px 10px rgba(255, 255, 255, 0.75);
  }
  100% {
    -webkit-transform: scale(1, 1);
    transform: scale(1);
    opacity: 0;
    box-shadow: none;

  }
}


.add-button {
  width: 50px;
  height: 50px;
  background-color: #21130D;
  border-radius: 50%;
  border: none;
  color: #68FF00;
  font-size: 24px;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
  cursor: pointer;
  transition: all 0.2s ease-in-out;
  display: flex;
  justify-content: center;
  align-items: center;
}

.add-button:hover {
  transform: scale(1.1);
  box-shadow: 0 5px 10px rgba(0, 0, 0, 0.3);
}

.add-button i {
  position: relative;
}

.add-button i:before,
.add-button i:after {
  content: "";
  position: absolute;
  height: 20px;
  width: 3px;
  background-color: #fff;
}

.add-button i:before {
  top: 50%;
  left: 50%;
  height:40px;
  transform: translate(-50%, -50%) rotate(90deg);
}

.add-button i:after {
  top: 50%;
  left: 50%;
  height:40px;
  transform: translate(-50%, -50%);
}