html {
  font-family: 'Open Sans', sans-serif;
  font-size: 16px;
  color: #444;
}

h1,
h2,
h3,
.caption {
  font-weight: bold;
}

h1,
h2,
h3,
h4,
p {
  line-height: 1.4;
  display: block;
  margin-bottom: 0.5rem;
}

h1 {
  line-height: normal;
  font-size: 2.2rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
}

h2 {
  font-size: 1.5rem;
}

h3 {
  font-size: 1.2rem;
}

h4 {
  font-size: 1rem;
}

p {
  color: #666;
}

a:hover {
  cursor: pointer;
  color: dodgerblue;
  transition: color, 2s, ease-in, 0.3s;
}

.flex {
  display: flex;
  align-items: center;
}

.container {
  /*max-width: 1200px;*/
  padding-left: 1.5rem;
  padding-top: 2rem;
  padding-bottom: 2rem;
  top: 4rem;
  position: relative;
}

header {
  height: 4rem;
  width: 100%;
  background-color: white;
  opacity: 0.95;
  position: fixed;
  z-index: 10;
  transition: opacity, 2s, ease-out, 0.2s;
}

header:hover {
  opacity: 1;
  transition: opacity, 2s, ease-in, 0.2s;
}

.mobile {
  display: none;
}

.logo,
.copyright {
  flex-grow: 1;
}

.logo img {
  padding-left: 1.5rem;
  padding-right: 0.25rem;
}

.colmar {
  font-family: 'Raleway', sans-serif;
  font-weight: bold;
  color: black;
}

.academy {
  font-family: 'Raleway', sans-serif;
  font-weight: 300;
  color: Silver;
}

nav li {
  display: inline-block;
  padding: 0.5rem;
}

nav li a {
  color: #666;
}

nav {
  margin-right: 2rem;
}

/*.lecture, .fisma,*/
.banner,
.learning {
  background-color: Gainsboro;
}

.banner img {
  width: 60%;
  margin-right: 2.5rem;
  height: auto;
}

.banner .title {
  width: 28%;
}

.start-btn {
  background-color: #444;
  justify-content: center;
  margin: 2rem auto;
  padding: 0.5rem;
  color: lightgray;
}

.start-btn:hover {
  background-color: #666;
  transition: background-color 0.2s ease-in 0s;
  cursor: pointer;
}

.main-section {
  width: 60%;
  flex-direction: column;
  margin-right: 1.5rem;
}

.main-section img,
.main-section video {
  width: 100%;
  height: auto;
  padding-bottom: 2rem;
}

#campus,
.thesis {
  align-items: flex-start;
}

.sidebar {
  width: 480px;
  flex-direction: column;
  margin-top: -1rem;
}

.sidebar .item {
  padding-right: 0.5rem;
}

.sidebar .item:hover {
  background-color: Gainsboro;
  transition: background-color .1s ease-in 0s;
}

.sidebar img {
  width: 35%;
  height: auto;
  padding: 1rem;
}

.read-more a {
  color: dodgerblue;
}

.learning {
  flex-wrap: wrap;
  justify-content: center;
}

.learning .title,
.thesis .title {
  width: 100%;
  text-align: center;
  display: block;
}

.learning .item {
  height: 316px;
  width: 25%;
  margin: 1rem;
  background-color: white;
}

.learning .item:hover {
  background-color: silver;
  transition: all 0.1s ease-in;
}

.learning img {
  width: 100%;
  height: auto;
}

.learning .content {
  padding: 1rem 1rem 0 1rem;
}

.thesis .title h1 {
  margin-bottom: -1rem;
}

footer{
  font-size: 0.75rem;
  color: silver;
  border-top: 2px solid whitesmoke;
}

/*Mobile styling*/
@media only screen and (max-width: 640px) {

  .mobile {
    display: inline-flex;
    width: 100%;
  }

  header .mobile {
    justify-content: space-around;
  }

  nav {
    margin: 0;
  }

  nav a:hover {
    cursor: pointer;
    background-color: gainsboro;
    border-bottom: 2px solid dodgerblue;
  }

  .container {
    padding-left: 0;
    padding-right: 0;
  }

  .banner {
    flex-direction: column;
    justify-content: center;
  }

  .banner img {
    width: 100%;
    margin-right: 0;
  }

  .banner .title {
    width: auto;
    margin-left: 1rem;
    margin-right: 1rem;
  }

  .sidebar,
  .sidebar img,
  .sidebar .content {
    width: 100%;
    padding-left: 1rem;
    padding-right: 1rem;
  }

  .sidebar .content {
    width: 100%;
    padding-left: 2rem;
  }

  .sidebar .item {
    flex-direction: column;
  }

  .learning {
    background-color: white;
  }

  .learning .item {
    height: auto;
    width: 100%;
    background-color: Gainsboro;
  }

  .learning .item img,
  .learning .item h4,
  .learning .item p{
    display: none;
  }

  /*.learning .item:hover .learning .item img {
    display: block;
  }*/

  .thesis .main-section {
    width: 100%;
    justify-content: center;
    margin-right: 0;
  }

  .desktop {
    display: none;
  }

  footer .copyright,
  footer nav {
    padding-left: 1rem;
    padding-right: 1rem;
  }
}