:root
{
    --mainc: gray;
}

body
{
    font-family: 'Courier New', Courier, monospace;
    margin-left: 10px;
    margin-right: 10px;
    margin-top: 0;
    margin-bottom: 0;
    background: white;
    transition: 1s;
}
body > section
{
    display: flex;
    width: 100%;
    align-items: center;
    min-height: 100vh;
    gap: 20px;
    justify-content: space-evenly;
}

.border-gen
{
    background: hsl(0 0% 100%);
    border: 1px solid hsl(220 13% 91%);
    box-shadow: 
        0 1px 2px hsl(220 13% 10% / 0.04),
        0 4px 12px hsl(220 13% 10% / 0.06);
}