body {
    padding: 0;
    margin: 0;
    font-size: 15px;
}

header {
    border-bottom: 1px solid #000000;
    padding-top: 10px;
    padding-bottom: 10px;
    margin: 0;
}

header h1 {
    text-align: center;
    font-size: 200%;
}

nav {
    float: left;
    width: 190px;
}

.dropdown {
    position: relative;
    width: 190px;
}

.dropdown h2 {
    text-align: center;
    background-color: #92d050;
    margin: 0;
    padding: 12px 16px;
}

.dropdown ul {
    display: none;
    position: absolute;
    background-color: #f0f0f0;
    box-shadow: 0px 8px 16px rgba(0,0,0,0.2);
    list-style-type: none;
    margin: 0;
    padding: 0;
    z-index: 1;
}

.dropdown a {
    display: block;
    color: #000;
    padding: 12px 16px;
    text-decoration: none;
    width: 158px;
}

.dropdown a:hover {
    background-color: #555;
    color: #fff;
}

.dropdown:hover h2 {
    background-color: #82e040;
}

.dropdown:hover ul {
    display: block;
}

article {
    margin-left: 210px;
}

footer {
    clear: both;
    border-top: 1px solid black;
    padding: 10px;
    font-style: italic;
    text-align: right;
}