.toggle-sound {
  position: fixed;
  bottom: 20px;
  left: 20px;
  background-color: #fd1742;
  width: 55px;
  height: 55px;
  line-height: 55px;
  text-align: center;
  color: #f2ff00;
  border-radius: 50%;
  cursor: pointer;
  z-index: 99;
  animation: pulse 1.25s infinite cubic-bezier(0.66, 0, 0, 1);
  box-shadow: 0 0 0 0 #fd1742;
}

.toggle-sound.sound-mute {
  box-shadow: none;
}

@keyframes pulse {
  to {
    box-shadow: 0 0 0 45px rgba(232, 76, 61, 0);
  }
}

.sound {
  width: 97%;
  height: 100%;
  position: absolute;
  cursor: pointer;
  display: inline-block;
  left: 0;
  top: 0;
  margin-left: -15%;
}

.sound--icon {
  color: inherit;
  line-height: inherit;
  font-size: 1.6rem;
  display: block;
  margin: auto;
  text-align: left;
  padding-left: 20px;
}

.sound--wave {
  position: absolute;
  border: 2px solid transparent;
  border-right: 2px solid #f2ff00;
  border-radius: 50%;
  transition: all 200ms;
  margin: auto;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
}

.sound--wave_one {
  width: 45%;
  height: 40%;
}

.sound--wave_two {
  width: 70%;
  height: 62%;
}

.sound--wave_three {
  width: 95%;
  height: 75%;
}

.sound-mute .sound--wave {
  border-radius: 0;
  width: 35%;
  height: 35%;
  border-width: 0 2px 0 0;
  left: 5px;
}

.sound-mute .sound--wave_one {
  transform: rotate(45deg) translate3d(0, -50%, 0);
}

.sound-mute .sound--wave_two {
  transform: rotate(-45deg) translate3d(0, 50%, 0);
}

.sound-mute .sound--wave_three {
  opacity: 0;
  transform: translateX(-46%);
  height: 20%;
}