*{
    box-sizing: border-box;
}

body{
    background-color: #F5F5F5;
    font-family: monospace;
    font-size: 14px;
    height: 100%;
    image-rendering: pixelated;

}

a{
    text-decoration: none;
}

a:hover{
    text-decoration: underline dotted 1px;
    font-style: italic;
}

nav{
    border: transparent;
    box-shadow: 10px 10px 0 #D3D3D3;
    border: 1px solid black;
    height: 100%;
    width: 270px;
    padding: 10px;
    top: 10px;
    left: 10px;
    position: fixed;
}

main{
    width: 600px;
    margin: 20px 0 0 320px;
}

iframe{
    box-shadow: 10px 10px 0 #D3D3D3;
    width: 100%;
    height: 600px;
    border: 1px solid black;
    overflow: auto;
}

img{
    border: 1px solid black;
    width: 100%;
}

h1,h2,h3,h4{
    margin: 0;
    padding: 2px;
    background: linear-gradient(90deg, #D3D3D3, #F5F5F5)
}

ul{
    margin: 6px 0 3px 6px;
    padding-left: 30px;
    padding: 0;
}

li{
    margin: 0;
    padding: 0;
    list-style-type: none;
}

details h2{
    display: inline;
    background: transparent;
}

summary::marker{
  font-size: 18px;
}

p{
    margin: 0 2px;
}

hr{
    border: transparent;
    border-top: 1px solid black;
}