.row {
    display: flex;
    flex-direction: column;
    justify-content: space-around;
    align-content: center;
    gap: 2em;
}

.col {
    /* these are now flex items */
    width: 100%;
}

.main-font {
    font-family: var(--mainFontFamily);
    color: var(--mainFontColor);
}

h1 {
    text-align: center;
    font-size: 1.75rem;
    margin-top: 2em;
}

p {
    text-align: center;
    font-size: 1.5rem;
}

.book-cover {
    display: block;
    line-height: 0;
    margin: 0 auto;
    width: 25%;
    min-width: 200px;
    max-width: 500px;
    margin-bottom: 4em;
}

.book-cover img {
    max-width: 100%;
    box-shadow: 10px 10px 20px 5px var(--shadowColor);
}