body {
    font-size: 12px;
    font-family: Georgia, serif;
    color: blue;
  }
header {
    background-color: darkblue;
    height: 60px;
}
header h1 {
        font-size: 30px;
        font-family: 'Edu TAS Beginner', cursive;
        color: rgb(237, 235, 239);;
        line-height: 60px;
}
nav {
    background-color: green;
}
nav li {
    display: inline;
    list-style: none;
}
nav a {
    display: inline-block;
    padding: 10px;
    color: goldenrod;
}
h1 {
    color: green;
    font-size: 140%;
    font-weight: bold;
    margin-bottom: 20px;
}
h2 {
    margin: 20px;
}
h3 {
    margin: 20px;
}
ul {
    color: black;
    line-height: 30px;
}
ol {
    color: black;
    line-height: 30px;
}
li {
    color: black;
    line-height: 30px;
}
p {
    line-height: 16px;
    margin-bottom: 12px;
}
footer {
    background-color: darkblue;
    color: white;
    font-size: 85%;
    padding: 10px;
}
main {
    float: left;
    box-sizing: border-box;
    padding: 20px;
    width: 70%;
}
aside {
    float: left;
    box-sizing: border-box;
    padding: 20px;
    width: 30%;
}
a {
    color: purple;
}

  @media screen and (max-width: 800px) {
    main {
        float: none;
        width: 100%;
    }
    aside {
        float: none;
        width: 100%;
    }
    #main-nav {
        position: absolute;
        top: 60px;
        height: 100%;
        width: 0;
        transition: width .5s;
        z-index: 100;
    }
    #main-nav li{
        overflow: hidden;
    }
    main-nav.show{
        width: 250px;
    }
    main-nav ul li{
        display: block;
    }
    #mobile-nav-button {
        position: absolute;
        top: 0px;
        right: 0px;
        width: 44px;
        height: 44px;
        font-weight: bold;
        line-height: 44px;
        text-align: center;
        cursor: pointer;
        display: block;
      }
}
  
#content {
    overflow: auto;
  }