#wrapper {
    width:98%;
    margin: 0 auto;
}
#nav_bar {
    
    height: 5em;
    width: 50%;
    margin: 0 auto;
    min-width: 933px;
    max-width: 933px;
}
#nav_bar_list {
    height: auto;
    margin: 0;
    list-style: none;
    width: 100%;
    padding: 0px;
    border: 2px solid gray;
    background-color: #8891a0;
   
}
.nav_bar_list_item {
     display: inline-block;
    font-family: Arial;
    color: white;
    font-size: 22px;
    border-right: 2px solid gray;
    padding: 10px;
    width: 13.95%;
    text-align: center;
    background-color: #8891a0
}
.nav_bar_list_item:hover {
    background-color: white;
    color: black;
    cursor: pointer;
}
h1 {
    width: 50%;
    margin: 0 auto;
    font-family: Arial;
    margin-bottom: 50px;
}
.sub_headings {
    font-family: Arial;
    font-size: 18px;
    width: 50%;
    margin: 0 auto;
    margin-bottom: 25px;
    margin-top: 50px;
}
xmp {
    font-family: Arial;
    font-size: 14px;
    width: 50%;
    margin: 0 auto;
}