* {
  position: relative;
  box-sizing: border-box;
}

html,
body {
  height: 100%;
}

html {
  background-color: #000;
}

body {
  overflow: hidden;
  color: rgba(0, 0, 0, 0);
  font-family: "Russo One", arial, sans-serif;
  line-height: 1.25;
  letter-spacing: 0.06em;
}

.hide {
  opacity: 0;
  visibility: hidden;
}

.remove {
  display: none !important;
}

.blur {
  filter: blur(12px);
}

.container {
  height: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
}

.stage-container {
  overflow: hidden;
  box-sizing: initial;
  border: 1px solid #222;
  margin: -1px;
}
@media (max-width: 840px) {
  .stage-container {
    border: none;
    margin: 0;
  }
}

.canvas-container {
  width: 100%;
  height: 100%;
  transition: filter 0.3s;
}
.canvas-container canvas {
  position: absolute;
  mix-blend-mode: lighten;
  transform: translateZ(0);
}

.controls {
  position: absolute;
  top: 0;
  width: 100%;
  padding-bottom: 50px;
  display: flex;
  justify-content: space-between;
  transition: opacity 0.3s, visibility 0.3s;
}
@media (min-width: 840px) {
  .controls {
    visibility: visible;
  }
  .controls.hide:hover {
    opacity: 1;
  }
}

.credits {
  margin-top: auto;
  margin-bottom: 10px;
  padding-top: 6px;
  font-size: 0.8em;
  opacity: 0.75;
}
.credits a {
  color: rgba(255, 255, 255, 0.5);
  text-decoration: none;
}
.credits a:hover,
.credits a:active {
  color: rgba(255, 255, 255, 0.75);
  text-decoration: underline;
}

.firework-sound {
  position: fixed;
  z-index: 1;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  top: 20px;
  right: 20px;
  text-align: center;
  background: url("../img/fireworks-sound.svg") no-repeat;
  background-position: center;
  background-size: 100% 100%;
}

.firework-sound.firework-sound-active {
  -webkit-animation: rotataZ 1.2s linear infinite;
  animation: rotataZ 1.2s linear infinite;
}

@-webkit-keyframes rotataZ {
  0% {
    -webkit-transform: rotateZ(0deg);
  }
  100% {
    -webkit-transform: rotateZ(360deg);
  }
}
@keyframes rotataZ {
  0% {
    -webkit-transform: rotateZ(0deg);
  }
  100% {
    -webkit-transform: rotateZ(360deg);
  }
}