main {
    max-width: 1500px;
    width: 95%;
    display: grid;
    grid-template-columns: 560px 1fr;
    grid-template-rows: repeat(3, auto);
    grid-gap: 1.5em .5em;
}

main h1 { grid-row: 1 / 2; grid-column: 1 /3; }

main p { padding: .5em; }

main h2 { padding: .5em 1em; }

.gdesc {
    align-self: center;
    border-style: groove;
    border-color: gold;
    background-color: rgba(0, 0, 0, 0.5);
    border-width: 5px 2px;
    border-radius: 25px;
    padding: 0 .5em;
}

@media only screen and (max-width: 966px) {
    main {
        display:block;
        margin: 0;
        width: 100%;
    }

    main div { margin: 0 .5em;}

    main h2 { text-align: center; }
    main iframe { margin: 0 1em; }
}