* {
  cursor: default;
}

body {
  margin: 0;
  padding: 0;
  background: black;
  overflow: hidden;
  width: 100vw;
  height: 100vh;
}

canvas {
  margin: 0;
  padding: 0;
}

#btn {
  position: absolute;
  top: 0;
  right: 0;
  width: 5%;
  cursor: pointer;
}

#btn svg {
  cursor: pointer;
  animation: rotate 2s infinite;
}

@keyframes rotate {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

#controls {
  position: absolute;
  top: -50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 70%;
  text-align: center;
  overflow: hidden;
  background: rgba(0, 0, 0, 0.7);
  border-radius: 20px;
  color: white;
  box-shadow: 0 0 10px 5px black;
  transition: 1s;
}

#fullscreen-btn {
  background: rgba(60, 179, 114, 0.384);
  display: flex;
  align-content: center;
  justify-content: center;
}

#fullscreen-btn h1 {
  background: brown;
  padding: 0.5em;
  border-radius: 10px;
  box-shadow: 0 0 10px 5px rgba(0, 0, 0, 0.7);
  cursor: pointer;
}

#circlesNum {
  width: 90%;
  -webkit-appearance: none;
  background: blueviolet;
  height: 5px;
  outline: none;
  border-radius: 5px;
}

#circlesNum::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: rgba(43, 255, 0, 0.7);
  cursor: pointer;
}

#close-btn {
  background: rgba(60, 179, 114, 0.384);
  display: flex;
  align-content: center;
  justify-content: center;
}

#close-btn h4 {
  background: rgba(255, 0, 0, 0.74);
  padding: 0.5em;
  border-radius: 10px;
  box-shadow: 0 0 10px 5px rgba(0, 0, 0, 0.7);
  cursor: pointer;
}