#container {
    position: relative;
    overflow: hidden;
    box-sizing: border-box;
    margin: 20px auto;
}

canvas {
    margin: 0;
}

#mainMenu {
    background-color: #ff000085;
    width: 100%;
    height: 100%;
    position: absolute;
    top: 0;
    left: 0;
    transition: left 0.5s;
}

#mainMenu > h1 {
    margin: 100px auto 90px auto;
}

.menuButton {
    width: 300px;
    height: 40px;
    background-color: red;
    margin: 40px auto;
    line-height: 40px;
    border-radius: 20px;
    box-shadow: #0000008c 0px 2px 5px;
    cursor: pointer;
}

.menuButton:hover {
    background-color: rgba(255, 0, 0, 0.33);
    transition: background-color 0.5s, box-shadow 0.25s;
}

.menuButton:active {
    box-shadow: #0000002d 0px 0px 5px;
}

#credits {
    display: none;
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    background-color: blue;
    padding: 160px 160px;
    margin-bottom: 200px;
    box-sizing: border-box;
    animation: CreditsMovement 14s linear 1 normal both paused;
    transition: opacity 2s ease-in-out;
    opacity: 0;
}

#credits > h2, #credits > h3, #credits > p {
    margin-bottom: 20px;
}

#credits.show {
    opacity: 1;
}

@keyframes MainTitleKeyframes {
    0% { transform: rotate(0deg) scale(1); }
    25% { transform: rotate(90deg) scale(1.5); }
    50% { transform: rotate(180deg) scale(0.5); }
    75% { transform: rotate(270deg) scale(1); }
}

@keyframes CreditsMovement {
    0% {top: 0px}
    100% {top: -1000px}
}