:root {
    --grid-cols: 1;
}

* {
    box-sizing: border-box;
}

body {
    background-color: antiquewhite;
}

section {
    margin: auto;
    background-color: turquoise;
    width: 960px;
    display: grid;
    grid-template-columns: repeat(var(--grid-cols), 2fr);
}

header {
    text-align: center;
}

img {
    width: 24px;
}

#instructions {
    display: flex;
    justify-content: center;
    gap: 12px;
    padding: 12px;
}

#mainColor,
#secondaryColor {
    padding: 12px 16px 12px 16px;
    background-color: grey;
    border: 2px solid black;
    border-radius: 64px;
}

#secondaryColor {
    background-color: aqua;
}

#inputDisabled {
    width: 40px;
}

#pixel {
    border: 1px solid rgba(0, 0, 0, 0.486);
    text-align: center;
    padding-bottom: calc(1/1 * 100%);
}

#pixel:hover {
    background-color: aqua;
}