/* Fourth-level flyout for desktop mega-nav (theme already handles ul ul ul). */
.main-navigation ul li ul ul ul {
    left: 100%;
    top: -25px;
    padding: 25px 0;
    position: absolute;
    z-index: 11;
    visibility: hidden;
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.3s ease-in-out;
    background-color: #fff;
    box-shadow: 15px 15px 38px 0 rgba(0, 0, 0, 0.1);
}

.main-navigation ul li ul ul li:hover > ul {
    visibility: visible;
    opacity: 1;
    transform: translateY(0);
}

html[data-theme='dark'] .main-navigation ul li ul ul ul {
    background-color: #1a1f28;
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.45);
}

/* Fifth-level flyout (Services → Application development → Web → stack → leaf). */
.main-navigation ul li ul ul ul ul {
    left: 100%;
    top: -25px;
    padding: 25px 0;
    position: absolute;
    z-index: 12;
    visibility: hidden;
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.3s ease-in-out;
    background-color: #fff;
    box-shadow: 15px 15px 38px 0 rgba(0, 0, 0, 0.1);
}

.main-navigation ul li ul ul ul li:hover > ul {
    visibility: visible;
    opacity: 1;
    transform: translateY(0);
}

html[data-theme='dark'] .main-navigation ul li ul ul ul ul {
    background-color: #1a1f28;
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.45);
}