.header {
    width: 100%;
    background-color: #dce9f5;
    overflow: hidden;
}
.header a {
    float: left;
    display: block;
    color: white;
    text-align: center;
    padding: 14px 16px;
    text-decoration: none;
}
.header a.logo {
    font-size: 25px;
    font-weight: bold;
}
.header a:hover {
    background-color: #ddd;
    color: black;
}
.header a.active {
    background-color: #4CAF50;
    color: white;
}
.header .menu-icon {
    display: none;
}
.header .dropdown {
    float: left;
    overflow: hidden;
}
.header .dropdown .dropbtn {
    font-size: 16px;  
    border: none;
    outline: none;
    color: white;
    padding: 14px 16px;
    background-color: inherit;
    font-family: inherit;
    margin: 0;
}
.header .dropdown-content {
    display: none;
    position: absolute;
    background-color: #003b73;
    min-width: 250px;
    box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
    z-index: 1;
}
.header .dropdown-content .mega-menu {
    padding: 16px;
    display: flex;
    flex-wrap: wrap;
}
.header .dropdown-content .mega-menu div {
    flex: 1;
    margin: 8px;
}
.header .dropdown-content .mega-menu a {
    float: none;
    color: white;
    padding: 12px 16px;
    text-decoration: none;
    display: block;
    text-align: left;
}
.header .dropdown-content .mega-menu a:hover {
    background-color: #ddd;
    color: black;
}
.header .dropdown:hover .dropdown-content {
    display: block;
}
.header-right {
    float: right;
}
@media screen and (max-width: 600px) {
    .header a, .header-right {
        float: none;
        display: block;
        text-align: left;
    }
    .header .menu-icon {
        float: right;
        display: block;
        cursor: pointer;
    }
    .header .dropdown-content {
        position: static;
        box-shadow: none;
        background-color: inherit;
    }
    .header .dropdown-content .mega-menu {
        flex-direction: column;
    }
    .header .dropdown:hover .dropdown-content {
        display: none;
    }
    .header .dropdown-content.active {
        display: block;
    }
}