.page-section {
    padding: 8rem 0;
}

.text-white-75 {
    color: rgba(255, 255, 255, 0.75) !important;
}

.btn-xl {
    padding: 1.25rem 2.25rem;
    font-size: 0.85rem;
    font-weight: 700;
    text-transform: uppercase;
    border: none;
    border-radius: 10rem;
}

hr.divider {
    height: 0.2rem;
    max-width: 3.25rem;
    margin: 1.5rem auto;
    background-color: #0d6efd;
    opacity: 1;
}

hr.divider-light {
    background-color: #fff;
}

#mainNav {
    box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
    background-color: #fff;
    transition: background-color 0.2s ease;
}

#mainNav .navbar-brand {
    font-family: "Merriweather Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";
    font-weight: 700;
    color: #212529;
}

#mainNav .navbar-nav .nav-item .nav-link {
    color: #6c757d;
    font-family: "Merriweather Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";
    font-weight: 700;
    font-size: 0.9rem;
    padding: 0.75rem 0;
}

header.masthead {
    padding-top: 10rem;
    padding-bottom: calc(10rem - 4.5rem);
    background: linear-gradient(to bottom, rgba(92, 77, 66, 0.25) 0%, rgba(92, 77, 66, 0.5) 100%), url("../images/book-index.jpg");
    background-position: center;
    background-repeat: no-repeat;
    background-attachment: scroll;
    background-size: cover;
}


header.masthead h1, header.masthead .h1 {
    font-size: 2.25rem;
}

@media (min-width: 992px) {
    header.masthead {
        height: 100vh;
        min-height: 40rem;
        padding-top: 4.5rem;
        padding-bottom: 0;
    }

    header.masthead p {
        font-size: 1.15rem;
    }

    header.masthead h1, header.masthead .h1 {
        font-size: 3rem;
    }
}

@media (min-width: 1200px) {
    header.masthead h1, header.masthead .h1 {
        font-size: 3.5rem;
    }
}