nav {
            background: #176F99;
        }
        .menu {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .menu > li {
            position: relative;
        }
        .menu > li > a {
            display: block;
            color: #fff;
            padding: 15px 20px;
            text-decoration: none;
        }
        .menu > li:hover > a,
        .menu > li:focus-within > a {
            background: #176F99;
        }
        .submenu {
            display: none;
            position: absolute;
            left: 0;
            top: 100%;
            background: #176F99;
            list-style: none;
            margin: 0;
            padding: 0;
            min-width: 180px;
            z-index: 10;
        }
        .submenu li a {
            color: #fff;
            padding: 12px 20px;
            display: block;
            text-decoration: none;
        }
        .submenu li a:hover {
            background: #176F99;
        }
        .menu > li:hover .submenu,
        .menu > li:focus-within .submenu {
            display: block;
        }
        .menu-toggle {
            display: none;
            background: #176F99;
            color: #fff;
            border: none;
            padding: 15px 20px;
            font-size: 18px;
            cursor: pointer;
        }
        @media (max-width: 768px) {
            .menu {
                flex-direction: column;
                display: none;
            }
            .menu > li {
                width: 100%;
            }
            .menu-toggle {
                display: block;
            }
            .menu.open {
                display: flex;
            }
            .submenu {
                position: static;
                min-width: 0;
            }
      }