@keyframes fadeIn {
    0% {
        opacity: 0;
    }

    100% {
        opacity: 1;
    }
}

div.info {
    position: absolute;
    left: 0px;
    top: 0px;
    width: 850px;
    height: 100%;
    background: rgba(55, 55, 55, 0.5);
    border-radius: 20px;
    visibility: visible;
    opacity: 1;
    transition: opacity 0.3s linear;
}

#game {
    max-width: 850px;
    margin: auto;
    position: relative;
}

div.helptext {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, 'sans-serif';
    background-color: rgba(228, 228, 220, 0.9);
    margin: 80px 95px;
    padding: 30px 40px 50px 40px;
    border-radius: 20px;
    box-shadow: 10px 10px 5px rgba(32, 32, 32, .8);
}

div.helptext p,
div.helptext h1 {
    text-align: center;
}

div.hidden {
    visibility: hidden;
    opacity: 0;
    transition: visibility 0.3s, opacity 0.3s linear;
}

canvas {
    margin: auto;
}

.canvas-container {
  max-width: 100%;
  height: auto;
}

.canvas-container canvas {
  width: 100%;
  height: auto;
  display: block;
}