.step_panel {
    width: 10%;
    height: 85%;
    background-color:rgb(214, 239, 250);
    top:15%;
    left:0;
    position: absolute;
}


.left_panel {
    
    width: 30%;
    height: 100%;
    background-color:whitesmoke;
    left: 10%;
    top: 0;
    position: absolute;
}


.right_panel {
    width: 60%;
    height: 100%;
    background-color:none;
    right:0;
    top: 0;
    position: absolute;
}

.des{
    font-size:2vh;
    text-align: justify;
    margin:5%;
    /* font-family:'Times New Roman', Times, serif */
    
}

.hidden{
   display: none;
   
}

.emphasize{
    text-decoration-line: underline;
    font-weight:bold;
}



#menu {  
    margin-top:0%;
    margin-left:-10%;
    font-size:1.5vh;
    display: none;    
}

#menu li a{
    color: black;
}

#sub-menu{
    margin-left:-20%;
}

#menu_style {
    margin-left:5%;
    display: inline-block;    
    font-size: 3vh;
    cursor: pointer;
    color: black;    
}

.menu_panel{
    width:10%;
    height:15%;
    background-color:rgb(214, 239, 250);
    top:0;
    left:0;
    position: absolute;
}