/* ==========================================
   DROPDOWN NAVIGATION STYLES
   ========================================== */

/* Main navigation container */
.nav-menu {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    gap: 0.5rem;
}

.nav-menu > li {
    position: relative;
}

.nav-menu > li > a {
    display: block;
    padding: 0.75rem 1rem;
    color: white;
    text-decoration: none;
    font-weight: 500;
    transition: background-color 0.2s;
    border-radius: 4px;
}

.nav-menu > li > a:hover,
.nav-menu > li > a:focus {
    background-color: rgba(255, 255, 255, 0.2);
}

/* Dropdown menu container */
.nav-menu li.has-dropdown {
    position: relative;
}

/* Dropdown toggle indicator */
.nav-menu .has-dropdown > a::after {
    content: " ▼";
    font-size: 0.7em;
    margin-left: 0.3em;
    transition: transform 0.2s;
}

.nav-menu .has-dropdown:hover > a::after,
.nav-menu .has-dropdown:focus-within > a::after {
    transform: rotate(180deg);
}

/* Dropdown submenu */
.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 220px;
    background-color: var(--primary-color);
    border-radius: 4px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    padding: 0.5rem 0;
    margin-top: 0.25rem;
    list-style: none;
    z-index: 1000;

    /* Hidden by default */
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: opacity 0.2s, transform 0.2s, visibility 0.2s;
}

/* Show dropdown on hover or focus */
.has-dropdown:hover > .dropdown-menu,
.has-dropdown:focus-within > .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

/* Dropdown menu items */
.dropdown-menu li {
    margin: 0;
}

.dropdown-menu a {
    display: block;
    padding: 0.6rem 1.25rem;
    color: rgba(255, 255, 255, 0.95);
    text-decoration: none;
    font-size: 0.95rem;
    transition: background-color 0.15s, padding-left 0.15s;
    border-left: 3px solid transparent;
}

.dropdown-menu a:hover,
.dropdown-menu a:focus {
    background-color: rgba(255, 255, 255, 0.15);
    color: white;
    border-left-color: var(--secondary-color);
    padding-left: 1.5rem;
}

/* Active/current page indicator in dropdown */
.dropdown-menu a[aria-current="page"] {
    background-color: rgba(255, 255, 255, 0.1);
    font-weight: 600;
    border-left-color: var(--secondary-color);
}

/* Keyboard accessibility - focus visible */
.nav-menu a:focus-visible {
    outline: 3px solid var(--focus-color, #0066cc);
    outline-offset: 2px;
}

/* ==========================================
   MOBILE RESPONSIVE
   ========================================== */

@media (max-width: 768px) {
    /* Stack navigation vertically on mobile */
    .nav-menu {
        flex-direction: column;
        gap: 0;
    }

    .nav-menu > li {
        width: 100%;
    }

    .nav-menu > li > a {
        padding: 1rem;
        border-radius: 0;
    }

    /* Mobile dropdown positioning */
    .dropdown-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        background-color: rgba(0, 0, 0, 0.2);
        margin: 0;
        padding: 0;
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease-out;
    }

    /* Show dropdown when parent is hovered/focused/expanded */
    .has-dropdown:hover > .dropdown-menu,
    .has-dropdown:focus-within > .dropdown-menu,
    .has-dropdown.expanded > .dropdown-menu {
        max-height: 500px;
        transition: max-height 0.4s ease-in;
    }

    .dropdown-menu a {
        padding: 0.75rem 1rem 0.75rem 2rem;
        font-size: 0.9rem;
    }

    .dropdown-menu a:hover,
    .dropdown-menu a:focus {
        padding-left: 2.25rem;
    }

    /* Remove arrow rotation on mobile */
    .nav-menu .has-dropdown > a::after {
        content: " ▼";
        float: right;
        margin-left: auto;
    }
}

/* ==========================================
   REDUCED MOTION SUPPORT
   ========================================== */

@media (prefers-reduced-motion: reduce) {
    .dropdown-menu,
    .nav-menu a,
    .nav-menu .has-dropdown > a::after {
        transition: none;
    }
}

/* ==========================================
   HIGH CONTRAST MODE
   ========================================== */

@media (prefers-contrast: high) {
    .dropdown-menu {
        border: 2px solid white;
    }

    .dropdown-menu a:hover,
    .dropdown-menu a:focus {
        background-color: white;
        color: black;
    }
}