html, body {
    margin: 0;
    padding: 0;
    font-family: 'Source Sans Pro', sans-serif;
    color: #151515;
}

p {
    line-height: 1.5rem;
}

/* header */

header {
    background-color: white;
    padding: 0.5rem 0;
}

header h2 {
    font-size: 0.875rem;
    font-weight: bold;
    font-family: "Roboto", sans-serif;
    color: #0E0E0E;
}

header li {
    display: inline-block;
    margin-left: 2rem;
    font-size: 0.75rem;
    font-weight: 600;
}

header a {
    text-decoration: none;
    color: #0E0E0E;
}

.logo {
    display: block;
    width: 2rem;
    height: 2rem;
    margin-right: 0.25rem;
}

.container {
    display:flex;
    align-items: center;
    justify-content: space-between;
}

/* blog-section-1 */

.blog-section-1 {
    margin-top: 2rem;
}

.blog-section-1 time {
    color: #151515;
    font-size: 0.75rem;
}

.blog-section-1 h1 {
    font-size: 2.2rem;
    color: #151515;
    font-weight: bold;
}

/* blog-section-2 */

.blog-section-2 {
    margin-top: 4rem;
    margin-bottom: 4rem;
}

/* blog-section-3 */

.blog-section-3-grid {
    display: grid;
    grid-template: repeat(6, 1fr);
}

.blog-section-3 img {
    display: block;
    width: 100%;
}

.blog-section-3 time {
    display: block;
    margin-top: 1rem;
}

/* footer */

footer {
    color: white;
    background-color: #202020;
    padding: 4rem;
    margin-top: 2rem;
}

footer h4, footer p {
    margin: 0;
    text-align: center;
}

/* utility */

.display-flex-center {
    display: flex;
    justify-content: center;
    align-items: center;
}

.text-align-center {
    text-align: center;
}

.margin-bottom-2rem {
    margin-bottom: 2rem;
}

.margin-sides-1rem {
    margin-right: 1rem;
    margin-left: 1rem;
}

@media (min-width: 600px) {
    .blog-section-3-grid {
        grid-template: 1fr / 1fr 1fr 1fr;
        gap: 1rem;
    }

    header.margin-sides-1rem {
        margin-right: 2rem;
        margin-left: 2rem;
    }

    main.margin-sides-1rem {
        margin-right: 2rem;
        margin-left: 2rem;
    }

    .blog-section-1 time, .blog-section-1 h1, .blog-section-1 p{
        margin-right: 4rem;
        margin-left: 4rem;
    }

    .blog-section-2 {
        margin-right: 4rem;
        margin-left: 4rem;
    }

    .blog-section-1 {
        display: flex;
        justify-content: center;
        align-items: center;
    }

    .blog-section-1 h1, .blog-section-1 p {
        margin: 1rem 1.5rem;
    }
}