body {
    margin: 0;
    overflow: hidden;
    background: #111;
    font-family: Arial;
    color: white;
}

canvas {
    display: block;
    margin: 0 auto;
    background: #222;
}

#ui {
    position: absolute;
    top: 10px;
    left: 10px;
    font-size: 20px;
}

#gameOver {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 40px;
    display: none;
    text-align: center;
    text-shadow: 0px 0px 6px #000000;
}

#audioControls {
    position: absolute;
    top: 10px;
    right: 10px;
    background: rgba(0,0,0,0.5);
    padding: 10px;
    border-radius: 8px;
    font-size: 14px;
}

#audioControls input {
    width: 120px;
}

/* CSS */
.button-25 {
  background-color: #36A9AE;
  background-image: linear-gradient(#37ADB2, #329CA0);
  border: 1px solid #2A8387;
  border-radius: 4px;
  box-shadow: rgba(0, 0, 0, 0.12) 0 1px 1px;
  color: #FFFFFF;
  cursor: pointer;
  display: block;
  font-family: -apple-system,".SFNSDisplay-Regular","Helvetica Neue",Helvetica,Arial,sans-serif;
  font-size: 17px;
  line-height: 100%;
  margin: 0;
  outline: 0;
  padding: 11px 15px 12px;
  text-align: center;
  transition: box-shadow .05s ease-in-out,opacity .05s ease-in-out;
  user-select: none;
  -webkit-user-select: none;
  touch-action: manipulation;
  width: 100%;
}

.button-25:hover {
  box-shadow: rgba(255, 255, 255, 0.3) 0 0 2px inset, rgba(0, 0, 0, 0.4) 0 1px 2px;
  text-decoration: none;
  transition-duration: .15s, .15s;
}

.button-25:active {
  box-shadow: rgba(0, 0, 0, 0.15) 0 2px 4px inset, rgba(0, 0, 0, 0.4) 0 1px 1px;
}

.button-25:disabled {
  cursor: not-allowed;
  opacity: .6;
}

.button-25:disabled:active {
  pointer-events: none;
}

.button-25:disabled:hover {
  box-shadow: none;
}