robo.css

body {
    display: grid;
    grid-template-columns: 50% 50%;
}

#code {
    width: 75%;
    min-height: 200px;
}

#cells {
    width: fit-content;
    display: grid;
    grid-template-columns: auto auto auto auto auto;
    background-color: black;
    grid-gap: 4px;
}

#preview_panel {
    padding: 4px;
    background-color: black;
    width: fit-content;
}

.header-cell {
    background-color: white;
    padding: 4px;
}

.cell {
    width: 80px;
    height: 80px;
    background-color: white;
    background-repeat: no-repeat;
}

.tooltip {
    position: relative;
    display: inline-block;
}

.tooltip-text {
    visibility: hidden;
    background-color: white;
    color: black;
    padding: 5px;
    border-radius: 6px;
    border-width: 1px;
    border-color: black;
    border-style: solid;
    position: absolute;
    z-index: 1;
}