body {
        margin-left: 80px;
    max-width:800px;
    margin-bottom: 200px;
}

h1 {
    
    margin-left: 20px;
}
h2 {
    
    margin-left: 20px;
}
h3 {
    
    margin-left: 20px;
}
nav { 
    text-align: center;
}
table, td
{
    border-spacing: 5px;
    padding: 10px;
    width="100%";
    text-align: left;
    vertical-align: top;
    border: 1px solid black;
    border-collapse: collapse;
}
table, th
{
    padding: 10px;
    text-align: center;
    border: 1px solid black;
    border-collapse: collapse;
      vertical-align: top;
}
