/* Consolidated Navigation, Dropdown, and Overlay Styles */

.dropdown {
    position: relative;
    display: inline-block;
}

.dropdown-toggle {
    cursor: pointer;
}

.dropdown-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background-color: #fff;
    min-width: 400px; /* Increased to fully accommodate "Whole Thiosphere Handbook" */
    width: auto; /* Allow width to expand as needed */
    box-shadow: 0 2px 5px rgba(0,0,0,0.2);
    z-index: 1000;
    padding: 0.5rem 0;
    list-style: none;
    margin: 0;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.2s ease-in-out, visibility 0.2s ease-in-out;
}

.dropdown-menu li {
    padding: 0;
}

.dropdown-menu a {
    display: block;
    padding: 0.5rem 1.5rem; /* Increased horizontal padding */
    color: #333;
    text-decoration: none;
    white-space: nowrap;
    min-width: 100%; /* Ensure full width usage */
}

.dropdown-menu a:hover {
    background-color: #f5f5f5;
}

.dropdown:hover .dropdown-menu {
    display: block;
    opacity: 1;
    visibility: visible;
}

/* Mobile styles */
@media (max-width: 768px) {
    .nav-links {
        display: none;
        width: 100%;
        position: absolute;
        top: 100%;
        left: 0;
        background: #fff;
        padding: 1rem;
        box-shadow: 0 2px 5px rgba(0,0,0,0.2);
        z-index: 999;  /* Above the overlay */
    }
    .nav-links.active {
        display: flex;
        flex-direction: column;
        align-items: flex-start;
    }
    .nav-links a {
        padding: 0.5rem 0;
        margin-left: 2rem;
        text-align: left;
    }
    .dropdown {
        width: 100%;
    }
    .dropdown-menu {
        position: static;
        display: block;
        background: none;
        box-shadow: none;
        padding-left: 3rem;
        width: 100%;
        opacity: 1;
        visibility: visible;
    }
    .dropdown-menu li {
        margin: 0.5rem 0;
    }
    .dropdown-menu a {
        padding: 0.25rem 0;
        margin-left: 0;
    }
    .dropdown-toggle {
        pointer-events: none;
        margin-left: 2rem;
    }
    .hamburger {
        display: block;
        cursor: pointer;
    }
    .menu-overlay.active {
        display: block;
    }
}

/* Desktop menu styles */
@media (min-width: 769px) {
    .hamburger {
        display: none;
    }
    .nav-links {
        display: flex;
        align-items: center;
    }
    .dropdown-menu {
        display: block;
        position: absolute;
        top: 100%;
        left: 0;
        background-color: #fff;
        min-width: 400px; /* Increased to fully accommodate "Whole Thiosphere Handbook" */
    width: auto; /* Allow width to expand as needed */
        box-shadow: 0 2px 5px rgba(0,0,0,0.2);
        z-index: 1000;
        padding: 0.5rem 0;
        list-style: none;
        margin: 0;
        opacity: 0;
        visibility: hidden;
        transition: opacity 0.2s ease-in-out, visibility 0.2s ease-in-out;
    }
    .dropdown:hover .dropdown-menu {
        opacity: 1;
        visibility: visible;
    }
}

/* Overlay styles */
.menu-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 998;  /* Just below the mobile menu */
}