header {
    background-color: #f1f1f1;
    text-align: center;
    padding: 10px;
}

body {
    margin: 0;
    padding: 0;
}

footer {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    background-color: #f1f1f1;
    padding: 8px;
    text-align: center;
    z-index: 1000;
}

ul {
    display: flex;
    list-style-type: none;
    margin: 0;
    padding: 0;
    background-color: #333333;
}

ul li a {
    display: block;
    color: #f1f1f1;
    padding: 14px 16px;
    text-decoration: none;
}

ul li a:hover {
    background-color: #dddddd;
    color: black;
}

.dropdown {
    position: relative;
}

.dropdown-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background-color: #333333;
    min-width: 200px;
    box-shadow: 0 8px 16px rgba(0,0,0,0.2);
    z-index: 1000;
    flex-direction: column;
}

.dropdown:hover .dropdown-menu {
    display: flex;
}

.dropdown-menu li {
    width: 100%;
}

.dropdown-menu li a {
    padding: 12px 16px;
    border-bottom: 1px solid #555;
}

div.flex-container > div{
    margin: 10px;
    flex: 1;
    padding: 10px;
}

div.flex-container{
    margin-left: 10%;
    display: flex;
    flex-direction: row;
}

img {
    width: 20px;
}

div.flex > div{
    display: flex;
    margin: 10px;
    flex: 1;
    border: darkcyan solid;
    border-radius: 15px;
    padding: 20px;
}

div.flex{
    margin-left: 10%;
    display: flex;
    flex-direction: row;
}