@media (max-width: 64em) {
  .books-list-item {
    padding: 1rem;
  }

  .book-img {
    height: 60%;
  }

  .book-info .title {
    font-size: 1.5rem;
  }

  .book-info .author {
    font-size: 1rem;
  }

  .book-info .publisher,
  .book-info .publish-date {
    font-size: 0.6rem;
  }

  .nav-arrows-prev:link,
  .nav-arrows-prev:visited,
  .nav-arrows-next:link,
  .nav-arrows-next:visited {
    margin-right: 0;
    padding: 1rem;
    font-size: 0.7rem;
    width: 15%;
  }

  .content-outer .container-list {
    margin: 2rem 1rem;
  }
  .content-outer .container-list li {
    padding: 2rem 0;
  }

  .content-inner .author,
  .content-inner .date,
  .content-inner .misc {
    padding-left: 0;
  }

  .content-inner .topic,
  .content-inner .author,
  .content-inner .date,
  .content-inner .misc,
  .content-inner .role,
  .content-inner .trial-misc,
  .content-inner .research-misc,
  .content-inner .trial-desc,
  .content-inner .research-desc {
    font-size: 0.9rem;
  }
}

@media (max-width: 60em) {
  .header-nav a,
  .drop-down button,
  .drop-down-links a {
    font-size: 1.5vw;
  }

  .footer-copyright,
  .footer-link {
    font-size: 1vw;
  }

  .section-home-heading {
    margin: 2rem auto;
  }

  .content-about,
  .email-link:link,
  .email-link:visited,
  .email-link:active,
  .email-link:hover {
    font-size: 1.2vw;
  }

  .section-home-about {
    margin: 2rem auto;
  }

  .container-heading-resources,
  .title {
    font-size: 1.1rem;
  }

  .topic,
  .author,
  .date,
  .misc,
  .role,
  .trial-misc,
  .research-misc,
  .trial-desc,
  .research-desc {
    font-size: 0.9rem;
  }

  .resource-link {
    font-size: 1.2rem;
  }

  .more-info {
    font-size: 0.6rem;
  }
}

/*----------------------------------------------*/
@media (max-width: 53em) {
  .carousel-books,
  .carousel-books-list,
  .books-list-item {
    display: block;
    align-items: center;
  }

  .books-list-item {
    width: 80%;
  }

  .book-img {
    padding: 0% 20% 5%;
    width: 100%;
    height: auto;
  }

  .book-info {
    display: block;
    padding-bottom: 15%;
  }

  .nav-arrows,
  .nav-arrows-prev,
  .nav-arrows-next {
    display: none;
  }
}

/*----------------------------------------------*/
@media (max-width: 48.5em) {
  .footer-copyright,
  .footer-link {
    font-size: 1.5vw;
  }

  .section-home-heading {
    height: 40vh;
  }

  .home-heading h1 {
    padding: 1rem 2rem;
    letter-spacing: 0.35em;
  }

  .content-about,
  .email-link:link,
  .email-link:visited,
  .email-link:active,
  .email-link:hover {
    font-size: 1.5vw;
  }

  #resources .page-title-heading {
    margin-bottom: 0;
  }

  #resources .divider-olive {
    display: none;
  }

  .container-collapsible {
    margin: 2rem auto;
  }

  .container-heading-resources {
    letter-spacing: 0.3rem;
    font-size: 1rem;
  }

  .collapsible-content-outer .content-outer {
    padding: 0 1rem 1rem;
  }

  .content-outer .container-list {
    margin: 0rem;
  }

  .content-outer .container-list li {
    padding: 2rem 0 0;
  }

  .main-toggle::after {
    border-top: 0.3rem solid transparent;
    border-bottom: 0.3rem solid transparent;
    border-left: 0.3rem solid var(--bright-green-1);
  }

  .toggle:checked + .main-toggle::after {
    border-left: 0.3rem solid var(--bright-aqua-1);
  }

  .section-home-about {
    margin: 2rem auto;
  }

  .container-heading-resources,
  .title {
    font-size: 0.9rem;
  }

  .topic,
  .author,
  .date,
  .content-inner .misc,
  .role,
  .trial-misc,
  .research-misc,
  .trial-desc,
  .research-desc {
    font-size: 0.6rem;
  }

  .resource-link {
    font-size: 1rem;
  }

  .more-info {
    font-size: 0.5rem;
  }
}
/*----------------------------------------------*/

@media (max-width: 41em) {
  .header-nav,
  .section-home-heading,
  .page-heading {
    display: none;
  }

  .hidden-title {
    display: block;
    width: 80%;
    margin: 2rem auto;
    padding: 1.5rem 1rem;
    text-align: center;
    letter-spacing: 0.4rem;
    background-image: var(--blue-gradient);
    color: var(--white-1);
    box-shadow: var(--shadow);
  }

  .hidden-title img {
    height: 2.5rem;
    width: 2.5rem;
  }

  .hidden-nav {
    display: block;
    width: 80%;
    text-align: center;
    margin: 0 auto;
    background-color: var(--white-1);
  }

  .hidden-nav-list {
    padding: 1rem 0;
    list-style: none;
    columns: 2;
    -webkit-columns: 2;
    -moz-columns: 2;
    box-shadow: var(--shadow);
  }

  .hidden-nav-list-link:link,
  .hidden-nav-list-link:visited {
    text-decoration: none;
    letter-spacing: 0.3rem;
    font-weight: 700;
    font-size: 0.7rem;
    font-family: monospace;
    color: var(--dark-blue-1);
  }

  .hidden-nav-list-link:active,
  .hidden-nav-list-link:hover {
    color: var(--olive-1);
  }

  .hidden-nav-list .divider-olive {
    width: 60%;
  }
  .container-about {
    display: block;
  }

  .container-dark,
  .container-light,
  .container-medium {
    width: 100%;
  }

  .container-dark {
    height: 10vh;
  }

  .container-dark h2 {
    font-size: 1.1rem;
  }

  .container-light {
    padding: 1.2rem;
  }

  .container-medium {
    padding-bottom: 1rem;
  }

  .content-about,
  .email-link:link,
  .email-link:visited,
  .email-link:active,
  .email-link:hover {
    font-size: 0.7rem;
  }

  .page-content {
    margin: 2rem 0;
  }

  .page-title-heading {
    font-size: 2rem;
    letter-spacing: 0.5rem;
  }

  .nav-books {
    width: 75%;
  }

  .book-thumbnail {
    height: 2rem;
    width: 2rem;
  }

  .book-info .title {
    font-size: 1rem;
  }

  .book-info .author {
    font-size: 0.7rem;
  }

  .container-heading-resources {
    letter-spacing: 0.1rem;
    font-size: 1rem;
  }

  .main-toggle::after {
    border-top: 0.25rem solid transparent;
    border-bottom: 0.25rem solid transparent;
    border-left: 0.25rem solid var(--bright-green-1);
  }

  .toggle:checked + .main-toggle::after {
    border-left: 0.25rem solid var(--bright-aqua-1);
  }

  .footer-copyright,
  .footer-link:link,
  .footer-link:visited,
  .footer-link:active,
  .footer-link:hover {
    font-size: 0.5rem;
  }
}

/*----------------------------------------------*/

@media (max-width: 32em) {
  .container-collapsible {
    padding: 0.5rem;
  }

  .container-heading-resources {
    letter-spacing: 0;
    font-size: 0.9 rem;
  }

  .title {
    font-size: 0.9rem;
  }

  .content-inner .topic,
  .content-inner .author,
  .content-inner .date,
  .content-inner .misc,
  .content-inner .role,
  .content-inner .trial-misc,
  .content-inner .research-misc,
  .content-inner .trial-desc,
  .content-inner .research-desc {
    font-size: 0.6rem;
  }

  .resource-link {
    font-size: 1rem;
  }

  .more-info {
    font-size: 0.5rem;
  }

  .main-toggle::after {
    border-top: 0.2rem solid transparent;
    border-bottom: 0.2rem solid transparent;
    border-left: 0.2rem solid var(--bright-green-1);
  }

  .toggle:checked + .main-toggle::after {
    border-left: 0.2rem solid var(--bright-aqua-1);
  }
}