.classes-main-background {
  background-size: cover;
  background-repeat: no-repeat;
  background-position: center center;
  min-height: 600px;
}
.classes-main-center {
  height: 600px;
  min-width: 200px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 30px;
  color: #ffffff;
}
.classes-main-link {
  border-radius: 10px;
  border: 1px solid transparent;
  text-align: center;
  padding: 30px 50px;
  background-color:rgba(204, 204, 204, 0.5);
}
.classes-main-link-title {
  font-size: 2.5em;
}
.classes-main-link-button {
  background-color: #00ff00;
  font-size: 1.2em;
  padding: 5px 50px;
  border-radius: 5px;
}

/* individual classes */
.classes-individual-top-image {
  background-size: cover;
  background-repeat: no-repeat;
  background-position: center center;
  min-height: 300px;
  max-height: 350px;
}
.classes-individual-title {
  font-size: 2.5em;
  padding-top: 10px;
  padding-bottom: 10px;
}
.classes-individual-desc {
  font-size: 1.1em;
  padding-top: 10px;
  padding-bottom: 10px;
}
.classes-individual-menu-parent {
  display: flex;
  flex-direction: column;
}
.classes-individual-menu {
  margin: 20px 60px;
  padding: 10px;
  border: 2px solid #4DD21F;
  border-radius: 5px;
}
.classes-individual-submenu {
  margin: 10px 40px;
}
.classes-individual-menu-parent:first-child  {
  margin-top: 70px;
}
.classes-individual-menu-link {
  color: #4DD21F;
}
.classes-individual-menu-link:hover {
  text-decoration: none;
}
.classes-individual-schedule {
  border: 1px solid #000000;
  padding: 20px 10px;
}
.classes-individual-schedule-main-title {
  font-size: 1.8em;
  padding: 20px 10px;
}
.classes-individual-schedule-title {
  font-size: 1.3em;
}
.classes-individual-schedule-link {
  color: inherit
}
.classes-lecture-empty {
  height: 50px;
}