main {
    display: grid;
    overflow: auto;
    grid-template-columns: 50% 50%;
}

main > div {
    padding: 2%;
    overflow: auto;
}

#program-list, #program-details {
    background-color: #dbb;
}

.programs {
    display: grid;
    grid-auto-rows: 14em;
    grid-template-columns: repeat(auto-fit, 40%);
    grid-gap: 0.8em;
}

.program {
    position: relative;
    background-color: #fb8;
}

.program a {
    position: absolute;
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100%;
    width: 100%;
    text-decoration: none;
    color: inherit;
    transition: color 0.5s;
}

.program:hover a {
    color: white;
}

.program .summary {
    font-weight: bold;
    text-align: center;
    transition: 0.5s;
}

.program:hover .summary {
    opacity: 1;
}

details summary .duration {
    font-family: monospace;
}