:root {
    --game-viewport-percentage: 0.8;
    --background-color: #222;
}
@font-face {
    font-family: Retro;
    src: url(assets/PressStart2P-Regular.ttf);
}

body {
    margin: 0;
    background-color: var(--background-color);
    font-family: Retro;
    color: white;
    overflow-y: hidden;
}
h3 {
    text-align: center;
    margin: 0;
}

#controls-container {
    position: absolute;
    width: 20rem;
    bottom: 0;
    left: 0;
    box-sizing: border-box;
    padding: 1rem;
    background-color: #333;
    transform: translateY(80%);
    transition-duration: 0.25s;
    border-top-right-radius: 1rem;
    user-select: none;
}
#controls-container:hover {
    transform: none;
}

#canvas-container {
    width: 100vw;
    height: 100vh;
    display: flex;
    position: absolute;
    align-items: center;
    justify-content: center;
}

.canvas-stack {
    position: absolute;
    width: round(
        down,
        calc(min(100vw, 100vh) * var(--game-viewport-percentage)),
        1px
    );
    height: round(
        down,
        calc(min(100vw, 100vh) * var(--game-viewport-percentage)),
        1px
    );
    border-radius: 1rem;
}