* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: sans-serif;
 }

 img {
   padding-top: 0px;
}

 hr {
   display: block;
   width: 80%;
   margin-top: 0.5em;
   margin-bottom: 0.5em;
   margin-left: auto;
   margin-right: auto;
   border-style: inset;
   border-width: 1px;
   color: #333;
}

 p{
   /* line-height: 1.6; */
   font-size: 0.6em;
   padding: 0 40px;
   text-align: center;
   color: #3D4852;
}

 header {
    height: 70px;
    background-color: #22292F;
    padding: 10px 0;
 }

 .menu-wrap {
    display: flex;
    justify-content: space-between;
    padding: 0 15px;
 }

 .logo-img {
    height: 50px;
 }
 .menu-icon {
    font-size: 2.4em;
    color: #ffffff;
    line-height: 50px;
 }

 /* div {
   width:80%;
   font-size: 10px;
} */

 .wrapper {
   padding-left: 10%;
   padding-right: 10%;
   font-size: 1.8em;
 }

 nav {
    position: absolute;
    background-color: #3D4852;
    top:70px;
    left:0;
    width: 100%;
 }

 nav ul {
    list-style-type: none;
    max-height: 0px;
    overflow: hidden;
    transition: all 0.5s;
 }
 nav ul li {
    padding: 0 15px;
 }
 nav ul li a {
    display: inline-block;
    padding: 12px;
    /* Add your custom styles below to change appearance of links */
    color: #DAE1E7;
    text-decoration: none;
    letter-spacing: 0.05em;
 }

 nav ul li a:hover, nav ul li a:focus {
    color: #eb6f4a;
 }

 nav ul ul {
    position: absolute;
    display: none;
 }


nav li:hover ul {
   display: inline-block;
}

 #checkbox {
   display: none;
}

#checkbox:checked ~ nav ul {
   max-height: 300px;
   padding: 15px 0;
   transition: all 0.5s;
}
/* 768px */
@media (min-width: 768px) {
   .menu-icon {
       display: none;
   }
   nav {
       position: relative;
       top: -10px;
       background-color: transparent;
   }
   nav ul {
       max-height: 70px;
       padding: 15px 0;
       text-align: right;
   }
   nav ul li {
       display: inline-flex;
       padding-left: 20px;
   }
   p {
      text-align: left;
      font-size: 16px;
      padding: 0 40px;
   }
}

h1{
   font-size: 1.3em;
   text-align: center;
   padding: 60px 40px 30px;
   color: #3D4852;
   line-height: 1.0;
}

h2{
   font-size: 1.1em;
   text-align: center;
   padding: 60px 40px 30px;
/*   padding: 60px 40px 30px;  */
   color: #3D4852;
   line-height: 1.2;
}

.footer {
   color:#3D4852;
   text-align: center;
   font-weight: bold;
   padding: 10px 0;
}
a:hover, nav ul li a:focus {
   color: #eb6f4a;
}
.err {
   font-family : Verdana, Helvetica, sans-serif;
   font-size : 1.2em;
   color: red;
}

pre {
    background-color: #f4f4f4;
    padding: 2px;
    border: 1px solid #ccc;
    overflow-x: auto;
    text-align: center;
    border-radius: 10px;
    width: 550px;
    margin-left: auto;
    margin-right: auto;
    }
code {
    font-size: 0.6em;
    font-family: monospace;
    }