body {
    margin: 0 auto;
    padding: 1rem;
}

header {
    background-color: burlywood;
    padding: 1rem;
    margin-bottom: 1rem;
}

section img,
section p {
    margin-bottom: 1rem;
}

aside {
    margin-top: 2rem;
    margin-bottom: 2rem;
}

aside img {
    margin-bottom: 1rem;
}

footer {
    border: 1px solid black;
    padding: 1rem;
}

@media(min-width: 640px) {
    .content {
        display: grid;
    }

    .content-title {
        grid-column: span 12;
    }

    .main-content {
        grid-column: 2 / 3;
        column-count: 2;
        column-gap: 20px;
    }

    .aside-img {
        display: flex;
        gap: 20px;
    }

    .aside-img img {
        width: calc((100% - 20px) / 2);
    }

    aside h2,
    .content-title {
        padding: .5rem;
        margin-bottom: 1rem;
        animation-name: title;
        animation-fill-mode: forwards;
        animation-duration: 300ms;
        animation-delay: 500ms;
        animation-timing-function: ease-in;
    }

    aside h2 {
        padding-top: 0;
    }

    img,
    header {
        animation-name: border-style;
        animation-fill-mode: forwards;
        animation-duration: 300ms;
        animation-delay: 500ms;
        animation-timing-function: ease-in;
    }

    @keyframes title {
        from {
            background-color: white;
            color: black;
            padding: 0;
        }

        to {
            background-color: black;
            color: white;
            padding: .5rem;
        }
    }

    @keyframes border-style {
        from {
            border: 0px solid black;
        }

        to {
            border: 1px solid black;
        }
    }
}

@media(min-width: 960px) {
    .grid-container {
        display: grid;
        grid-template-columns: repeat(12, 1fr);
        gap: 1rem;
    }

    header {
        grid-area: 1 / 1 / 12 / 1;
        display: flex;
        writing-mode: vertical-rl;
    }

    footer {
        grid-column: span 12;
    }

    section {
        grid-column: 2 / span 5;
    }

    aside {
        grid-column: span 5;
        margin: 0;
    }
}