body{
  margin: 0px;
  font-size: 120%;
}

/* main bar */

#bar{
  list-style-type: none;
  margin: 0;
  padding: 0;
  overflow: hidden;
  background-color: #333;
  position: fixed;
  top: 0;
  width: 100%;
  position: sticky;
}

/* #bar-ends, #bar-ends:hover:not(.active){
  background-color: #333;
  height: 2px;
  width: 100%;
} */

#li1{
  float: left;
  border-right: 1px solid #bbb;
}

#li, #bar-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: #4648e2;
}

#li:last-child{
  border-right: none;
}

/* panels */

#all-panels{
  display: flex;
}
#left-panel{
  width: 15%;
  height: 100%;
  background-color: white;
}

#middle-panel{
  width: 70%;
  height: 100%;
  padding: 10px;
  background-color: white;

  text-align: center;
}

#righ-panel{
  width: 15%;
  height: 100%;
  background-color: white;
}

/* other */

p{
  text-align: justify;
}

hr{
  color: #333;
}

header{
  text-align: center;
}

footer{
  height: 20px;
  background-color: #333;
}

#contents-list{
  text-align: left;
  list-style-type:disc
}