/*Grid*/
body {
    font-family: "Lato", sans-serif;
    font-size:16px;
}
h1 {
    text-align:center;
    font-size:2em;
}

h2 {
    text-align:center;
    font-size:1.5em;
}

h3 {
    text-align:left;
    font-size:1.17em;
    margin-bottom: 0.5em;
}
h4 {
    text-align:left;
    font-size:1em;
    margin-bottom:0.5em;
}

table {
    border-collapse:collapse;
}
table, td, th {
    border:1px solid black;
}

.MathJax {
    font-size:16px;
}
body, html {
    margin:0;
    padding:0;
}
figcaption {
    font-size:14px;
}
.imageclass {
    width: 100%;
    height: auto;
}
/*start or end problems figure */
.seimage {
    display: block;
    margin-left: auto;
    margin-right: auto;
}

.logo {
    grid-area: glogo;
    background-color:black;
    margin-top:0;
    
}
.logo img {
    width: 144px; /* 144px*/
    margin-left:10px;
    padding: 5px;
}

.content {
    grid-area: gcontent;
    text-align: left;
    padding-left: 30px;
    padding-top:10px;
    border-right: 2px solid white;
    border-radius: 5px;
    border:1px solid lightgray;
    
        
        
}

.topnav {
    grid-area: gtopnav;
    background-color: black;
    padding-left:20px;
}

.hambmenu {
    grid-area:ghambmenu;
    background-color:black;
}

.sidenav {
    grid-area: gsidenav;
    background-color: #FDF5E6;
    padding-right: 2px;
}

.ad {
    grid-area: gad;
    text-align: left;
}

.footer {
    grid-area: gfooter;
    padding-left:20px;
    padding-top:50px;
    text-align: center;
    padding-bottom:20px;
}


.topnav a {
    text-decoration: none;
    padding-top: 10px;
    padding-left:0;
    color: white;
    font-size: 17px;
    padding: 10px 16px 10px 10px;
    display:block;
    display:inline-block;
    }

  .topnav a:hover {
        border-bottom: 3px solid yellow;
    }
.sidenav ul {
    list-style-type: none;
    display: block;
    padding-left: 20px;
    display: block;
}
.sidenav ul li a {
    color: black;
    padding-top: 20px;
    text-decoration: none;
    font-size: 17px;
    display: block;
    border-bottom: 1px solid #333;

}


.footer nav a {
    padding-right:10px;
   
}


/*Big screen */

.wrapper {
    display: grid;
    grid-template-columns: 1fr 2.5fr 1fr 1fr;
    grid-template-areas: 
        "glogo  gtopnav gtopnav gtopnav" 
        "gsidenav gcontent gcontent gad" 
        "gsidenav gfooter gfooter gad";
}
.hambmenu .icon {
    display:none;
}

/* For mobile screen*/
@media screen and (max-width: 768px){
    .wrapper {
    display: grid;
    grid-template-columns: 3fr 1fr;
    grid-template-areas: "glogo ghambmenu" "gtopnav gtopnav" "gcontent gcontent" "gad gad" "gfooter gfooter";

    }

    .sidenav {
        display:none;
    }
    .hambmenu .icon {
        float:right;
        display:block;
        padding-top:10px;
        padding-right:10px;
    }
    .topnav a {
        display:none;
    }

    .topnav.responsive a {
        float:none;
        display:block;
        text-align:left;
        border-top: 1px solid white;
    }
    .topnav.responsive a:hover {
        border-bottom:none;
    }
    .content {
        grid-area: gcontent;
        text-align: left;
        padding-left: 10px;
        padding-right: 10px;
        padding-top: 10px;
        border-right: 2px solid white;
    }

       
}