.reference-book {

  .navbar {
    height: 60px;
    .teacher-edition {
      line-height: 60px;
      cursor: pointer;
    }
    .section-title {
      line-height: 60px;
      margin-left: 40px;
    }
    .dropdown-menu {
      width: 300px;

      ul{ padding-left: 0rem; }
      h3 {
        #fonts > .sans();
        border-top: 1px dotted @tutor-neutral;
      }
      li {
        #fonts > .sans(1.4rem);
        border-top: 1px dotted @tutor-neutral;
      }
      // no top border on the first element
      ul:first-of-type {
        h3, a { border-top: 0; }
      }
    }

  }
}

.reference-book {

  .navbar {
    height: 60px;

    .teacher-edition {
      line-height: 60px;
      cursor: pointer;
    }

    .section-title {
      line-height: 60px;
      margin-left: 40px;
    }

    .dropdown-menu {
      position: fixed;
      top: 60px;
      left: 0;
      bottom: 0;
      width: 300px;

      ul {
        padding-left: 0rem;
      }

      h3 {
        #fonts > .sans();
        border-top: 1px dotted @tutor-neutral;
      }

      li {
        #fonts > .sans(1.4rem);
        border-top: 1px dotted @tutor-neutral;
      }

      // no top border on the first element
      ul:first-of-type {
        h3,
        a {
          border-top: 0;
        }
      }
    }

  }
}

Fix reference view toc position to left side of screen
Fix reference view toc position to left side of screen
