header {
    background-color: #f1f1f1;
    text-align: center;
    padding: 10px;
}
body {
    margin: 20px;
    padding: 0;
}
footer {
    background-color: #f1f1f1;
    text-align: center;
    padding: 8px;
}

h2, p {
    margin: 10px;
}

ul {
    list-style-type: none;
    margin-left: 5px;
    padding: 0;
    overflow: hidden;
    background-color: darkcyan;
}

ul li {
    float: left;
    margin: 5px;
}

ul li a {
    display: block;
    color: white;
    text-align: center;
    padding: 14px 16px;
    text-decoration: none;
}

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

div.flex-container {
    display: flex;
    /* Show the flex items horizontally */
    flex-direction: row;

}

div.flex-container > div {
    margin: 10px;
    border: solid 1pt grey;
    border-radius: 10px;
    padding: 20px;
    flex: 1;
}
/* DROPDOWN */
.dropdown-menu {
    position: absolute;
    background-color: #222;
    min-width: 220px;
    list-style: none;
    padding: 0;
    margin: 0;
    display: none;
    z-index: 1000;
    box-shadow: 0 8px 20px rgba(0,0,0,0.5);
    border-radius: 0 0 8px 8px;
}

.dropdown-menu li a {
    display: block;
    padding: 12px 16px;
    color: #ddd;
    text-decoration: none;
    border-bottom: 1px solid #333;
    transition: background 0.3s, padding-left 0.3s;
}

.dropdown-menu li a:hover {
    background-color: darkcyan;
    padding-left: 22px;
    color: #fff;
}
.dropdown:hover .dropdown-menu {
    display: block;
}

/* Use media query and show the flex items vertically if screen width is less than 600px */
@media screen and (max-width:600px) {
    div.flex-container {
        flex-direction: column;
    }
}