:root {
  --main-bg-color: #fafafa;
}

html, body {
    font-family: 'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
    font-size: large;
    max-width: fit-content;
    background-color: var(--main-bg-color);
}

#container {
    display: grid;
    grid-template-columns: 3fr 1fr;
    grid-column-gap: 1ex;
}

#box {
    width:1024; height:800px; aspect-ratio: 1/1;
    background-color: var(--main-bg-color);
}

.controller-btn {
    min-width: 3ex;
    box-sizing: content-box;
}

#controller-elements {
    padding: 3ex;
    display: grid;
    grid-template-columns: 10ex 8ex 8ex;
    grid-column-gap: 1ex;
    grid-row-gap: 1.25ex;
}