*{
    padding: 0;
    margin: 0;
    
}

ul{
    list-style: none;
    background-color: gray;
}

ul li {
    display: inline-block;
    position: relative;
}

ul li a {
    display: block;
    padding: 20px 25px;
    color: white;
    text-decoration: none;
    text-align: center;
    font-size: 20px;
}

ul li ul.dropdown li {
    display: block;
}

ul li ul.dropdown{
    width: 100%;
    background: grey;
    position: absolute;
    z-index: 999;
    display: none;
}

ul li a:hover{
    background-color: grey;
}

ul li:hover ul.dropdown{
    display: block;
}
body{
    background-color: white;
    color: gray;
    text-align: center;
    font-family: 'Courier New', Courier, monospace;
}
a{
    color: gray;
}
h1{
    color: gray;
    font-size: 20px;
    font-family: 'Courier New', Courier, monospace;
    border: solid;
}
h3{
    color: gray;
    font-size: 15px;
    font-family: 'Courier New', Courier, monospace;
}
p{
    font-size: 15px;
    font-family: 'Courier New', Courier, monospace;
}
li{
    font-size: 20px;
    text-align: center;
    font-family: 'Courier New', Courier, monospace;
}
h4{
    font-size: 15px;
    font-family: 'Courier New', Courier, monospace;
    text-align: center;
    color: gray;
}
ul{
    font-size: 20px;
    font-family: 'Courier New', Courier, monospace;
    text-align: center;
    color: gray;
}