.collapsible {
  background-color: #777;
  color: white;
  cursor: pointer;
  padding: 18px;
  width: 100%;
  border: none;
  text-align: left;
  outline: none;
  font-size: 15px;
}

.collapsible:hover {
  background-color: #555;
}

.content {
  padding: 0 18px;
  display: none;
  overflow: hidden;
  background-color: #f1f1f1;
}

.myDIV {
  display: none;
  overflow: hidden;
  background-color: #f1f1f1;
}

td.myTableTd{
  color: white;
  background-color: #1CAAAA;

}
td.myTableTd_2{
  width: 200px;
}



.reading-article {
  max-height: 1500px;
}
.reading-article {
  border: solid 1px #333;
  border-radius: 3px;
  padding: 10px 10px 0 10px;
  background-color: #eef8f9;
  max-height: 600px;
  overflow-y: auto;
}
.reading-answer {
  max-height: 550px;
  overflow-y: auto;
}

.reading-top {
  width:100%;
}
.reading-bellow {
  width:100%;
  float: left;
  padding-top: 10px;
  border-top: solid 1px #ddd;
}
.reading-left {
  width:45%;
  float: left;
  margin-right: 4%;
  margin-left: 2%;
}
.reading-right {
  width:45%;
  float: left;
  margin-left: 4%;
}

@media screen and (max-width:767px){
.reading-left {
  width:100%;
  margin-right: 0;
  margin-left: 0;
}
.reading-right {
  width:100%;
  margin-left: 0;
}
.reading-answer {
  max-height: 1500px;
}
.reading-article {
  max-height: 1500px;
}
.reading-bellow {
  padding-top: 0px;
  border-top: none;
}
}

* {
  box-sizing: border-box;
}

.img-magnifier-container {
  position:relative;
}

.img-magnifier-glass {
  position: absolute;
  border: 3px solid #000;
  border-radius: 50%;
  cursor: none;
  /*Set the size of the magnifier glass:*/
  width: 100px;
  height: 100px;
}