body {
  background-color: #E8AD5A;
  text-align: center;
  color: black;
  font-family: 'Roboto', sans-serif;
  font-weight: 500;
  font-style: normal;
  font-size:16px;
  margin:0; /*enfernt Abstand bei Navigationsbar*/
}

/*Navigation Bar*/
ul {
  list-style-type: none;
  margin: 0;
  padding: 0;
  overflow: hidden;
  background-color: #653d16;
  position: fixed;
  top: 0;
  width: 100%;
  z-index: 9999; /*oberste Ebene*/
}

li {
  float: left;
}

li a {
  display: block;
  color: white;
  text-align: center;
  padding: 14px 16px;
  text-decoration: none;
}

li a:hover:not(.active) {
  background-color: #111;
}

.active {
  background-color: #f0b905;
}

/*Classroom*/
.classroomdesktop {
  height: 90vh;
  width: auto;
  margin-top: 10vh;
}

.classroommobile {
  display: none;
}

.classroomtablet {
  display: none;
}


/*Tabletversion*/
@media only screen and (max-width: 1024px) {

  /*Classroom Mobileversion*/
  .classroomdesktop {
    display: none;
  }
  .classroommobile {
    display: none;
  }
  .classroomtablet {
    display: block;
    width: 100vw;
    height: auto;
    margin: auto; /*zentrieren*/
    margin-top: 5vh;
  }

/*Mobileversion*/
@media only screen and (max-width: 750px) {

  .classroomdesktop {
    display: none;
  }
  .classroomtablet {
    display: none;
  }
  .classroommobile {
    display: block;
    height: auto;
    width: 100vw;
    margin-top: 10vh;
  }
}