.hamburger {
    display: flex;
    flex-direction: column;
    justify-content: center;
    width: 44px;
    height: 44px;
    background: none;
    border: none;
    cursor: pointer;
    z-index: 1101;
}
.hamburger span {
    display: block;
    height: 5px;
    width: 100%;
    background: #fff;
    margin: 6px 0;
    border-radius: 2px;
    transition: 0.3s;
}
.mobile-menu-overlay {
    display: none;
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(13,27,68,0.97);
    z-index: 1100;
    align-items: center;
    justify-content: center;
}
.mobile-menu-overlay.active {
    display: flex;
}
.mobile-menu-content {
    width: 100vw;
    height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    position: relative;
    text-align: center;
}
.mobile-menu-content .nav-link-custom {
    color: #fff;
    font-size: 2rem;
    margin: 30px 0;
    text-align: center;
    font-weight: bold;
    letter-spacing: 1px;
}
.close-menu {
    position: absolute;
    top: 18px;
    right: 18px;
    background: rgba(255,255,255,0.12);
    border: none;
    color: #fff;
    font-size: 3.5rem;
    font-weight: bold;
    cursor: pointer;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 12px rgba(0,0,0,0.18);
    transition: background 0.2s;
}
.close-menu:hover, .close-menu:focus {
    background: rgba(255,255,255,0.25);
    color: #d42389;
    outline: none;
}
@media (min-width: 768px) {
    .hamburger { display: none; }
    .mobile-menu-overlay { display: none !important; }
}