html {
    height: 100%;
    overflow-x: hidden;
    overflow-y: hidden;
}

body {
    background: #111;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    height: 100%;
    width: 100%;
}

.entity {
    position: absolute;
    left: 50%;
    top: 50%;
    --height: 100px;
    width: 50px;
    background-color: red;
    height: var(--height);
    text-align: center;
}

#world {
    min-width: 90vw;
    min-height: 80vh;
}

#menubar {
    min-height: 10vh;
    min-width: 100vw;
    background: #222;
}

#display {
    width: 100%;
    height: 100%;
    background: #333;
}