frame.css

iframe{
  border:none;
}
#home{
  width:100%;
  height:100%;
  
}
#menu{
  width:120px;
  height:85%;
  position:fixed;
  top:50px;
  left:-120px;
  visibility:hidden;
  transition:0.5s;
  background:rgba(0,0,0,0.4);
  box-shadow:2px 2px 9px black;
  border-top-right-radius:20px;
  border-bottom-right-radius:20px;
}
#menu:target,#course:target{
  left:0;
  visibility: visible;
}
#course{
  width:100px;
  height:85%;
  position:fixed;
  top:50px;
  left:-100px;
  visibility:hidden;
  transition:0.5s;
  background:rgba(0,0,0,0.4);
  box-shadow:2px 2px 9px black;
  border-top-right-radius:20px;
  border-bottom-right-radius:20px;
}
#container{
  visibility: hidden;
  width:100%;
  height:100%;
  background:rgba(150,150,150,0.9);
  position:fixed;
  top:-100%;
  left:0
  transition:1s;
 
}
#sign{
  width:90%;
  height:70%;
  border-radius:20px;
  margin:80px 15px 200px 15px;
  display:flex;
  justify-content: center;
  align-items:center;
}
#container:target{
  transition:1s;
  visibility: visible;
  top:0;
}
#log{
  font-size:15px;
  color:white;
  
}