.header-bottom__nav > li.submenu {
    position: relative;
    padding-bottom: 10px;
}
.header-bottom__nav > li.submenu:hover > strong span {
    background-color: #1e3a8a; 
    color: #ffffff;            
    padding: 5px 15px;
    border-radius: 4px 4px 0 0;
    display: inline-block;
}
.submenu__nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background-color: #1e3a8a;
    min-width: 280px;
    max-width: 350px;
    padding: 15px;
    margin: 0;
    list-style: none;
    border-radius: 0 8px 8px 8px;
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.2);
    z-index: 1000;
}
.header-bottom__nav > li.submenu:hover .submenu__nav {
    display: block;
}
.submenu__nav li {
    padding: 8px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.15);
}
.submenu__nav li:last-child {
    border-bottom: none;
}
.submenu__nav li a {
    color: #e2e8f0; 
    font-size: 0.95rem;
    display: block;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    text-decoration: underline;
}
.submenu__nav li a:hover {
    color: #ffffff;
}