#header .nav.navbar-nav.address-head span {
  margin-right: 25px;
}

#footer .footer-main {
  background-color: #013d6b;
}

#footer .footer-main h2 {
  color: #fff;
}

/***********************************************/

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

.cover-img {
    display: block;
    margin: 1rem auto 4rem;
}

.course-content .topics h3 {
  display: flex;

  span {
    flex-grow: 1;
  }

  .title-line {
    position: relative;
    font-weight: bold;
    margin-bottom: 2rem;
  }
}

.title-line::after {
  content: "";
  display: block;
  width: 97%;
  height: 1px;
  background-color: #013d6b;
  position: absolute;
  top: 13px;
  right: 0;
}

.activity {
  border-top: none;
}

.activity-item .activity-altcontent .img-resources {
  border-radius: 0;
}

.img-resources {
  transform: rotate(2deg);
  box-shadow: 5px 5px 10px 1px rgba(1, 61, 107, .2);
  margin: 2rem 3rem;
}

.list-resources {
  position: relative;
  left: 2rem;

  li {
    margin: 1rem 0;
  }
}

.title-resources {
  margin-top: 3rem;
}

.activity-item .activity-altcontent .img-teacher {

  margin-right: 3rem;

  img {
    border-radius: 50%;
  }
}

.title-teacher {
  font-size: 24px;
}

.message-teacher {
  margin-left: 5rem !important;
}

#page #page-header .img-teacher {
  margin: 1rem 3rem 1rem 1rem;
}

#page #page-header .img-first-teacher {
  margin-top: 1rem;
}

.img-teacher-margin-top {
  margin-top: 3rem;
}

#footer .footer-main h2 {
  font-size: 20px;;
}

#footer .footer-main p, #footer .footer-main .foot-links ul a  {
  font-size: 14px;
}

.footer-dark a:hover {
  color: #ccc;
}

@media (min-width: 992px) {
  .col-lg-3 {
    width: 22%;
    margin: 0 1%;
  }
}