html,
body {
  display: flex;
  background: #000;
  color: #fff;
  margin: 0;
  padding: 0;
}
html,
body,
canvas {
  position: absolute;
  top: 0;
  left: 0;
  z-index: 0;
  width: 100%;
  height: 100%;
}
body {
  position: relative;
}
.may-fourth {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  max-width: 50%;
  max-height: 40%;
  width: auto;
  height: auto;
  z-index: 1;
  pointer-events: none;
}
#music-toggle {
  position: fixed;
  bottom: 20px;
  right: 20px;
  padding: 10px 16px;
  font-size: 1rem;
  background-color: #000;
  color: #ffe81f;
  border: 2px solid #ffe81f;
  border-radius: 8px;
  font-family: 'Arial Black', Gadget, sans-serif;
  text-shadow: 0 0 5px #ffe81f;
  cursor: pointer;
  z-index: 999;
  transition: background-color 0.3s ease;
}
#music-toggle:hover {
  background-color: #111;
}
footer {
  position: fixed;
  bottom: 0;
  width: 100%;
  text-align: center;
  font-size: 0.8rem;
  color: #ffe81f;
  background: rgba(0, 0, 0, 0.8);
  padding: 5px 0;
  z-index: 998;
}