/* Variables */
:root {
    --industrial-gradient: linear-gradient(135deg, #2c3e50 0%, #1a1a2e 100%);
    --secondary-color: #4ecdc4;
    --transition: all 0.3s ease;
    --bs-primary: #2c3e50;
}

/* Base Navbar Styles */
.navbar {
    background: var(--industrial-gradient);
    padding: 0.5rem 1rem;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
}

.navbar-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 1rem;
}

/* Desktop Menu (992px and up) */
@media (min-width: 992px) {
    .nav-menu {
        display: flex;
        list-style: none;
        margin: 0;
        padding: 0;
        gap: 0.25rem;
    }

    .nav-item {
        position: relative;
    }

    .nav-link {
        color: rgba(255, 255, 255, 0.9);
        padding: 1rem 1.25rem;
        display: block;
        font-weight: 600;
        transition: var(--transition);
        position: relative;
        text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
        white-space: nowrap;
    }

    .nav-link::before {
        content: '';
        position: absolute;
        bottom: 0;
        right: 1.25rem;
        left: 1.25rem;
        height: 2px;
        background-color: var(--secondary-color);
        transform: scaleX(0);
        transition: var(--transition);
        transform-origin: right;
    }

    .nav-link:hover {
        color: white;
        background-color: rgba(255, 255, 255, 0.1);
    }

    .nav-link:hover::before {
        transform: scaleX(1);
    }

    .nav-link.active {
        color: white;
        background-color: rgba(255, 255, 255, 0.15);
    }

    .nav-link.active::before {
        transform: scaleX(1);
    }

    .dropdown-menu {
        background-color: var(--bs-primary);
        border: none;
        box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
    }

    .dropdown-item {
        color: white !important;
        padding: 0.75rem 1.5rem;
        transition: var(--transition);
    }

    .dropdown-item:hover {
        background-color: rgba(255, 255, 255, 0.1);
    }
}

/* Tablet Menu (768px to 991.98px) */
@media (min-width: 768px) and (max-width: 991.98px) {
    .nav-menu {
        display: flex;
        flex-wrap: wrap;
        justify-content: center;
        list-style: none;
        margin: 0;
        padding: 0;
    }

    .nav-item {
        flex: 0 0 25%;
        text-align: center;
        margin-bottom: 0.5rem;
    }

    .nav-link {
        color: rgba(255, 255, 255, 0.9);
        padding: 0.75rem 0.5rem;
        font-size: 0.9rem;
        display: block;
        font-weight: 600;
    }

    .dropdown-menu {
        position: static !important;
        width: 100% !important;
        background-color: rgba(0, 0, 0, 0.2) !important;
        margin-top: 0 !important;
    }
}

/* Mobile Menu (767.98px and down) */
@media (max-width: 767.98px) {
    .navbar-container {
        flex-direction: column;
        padding: 0.5rem;
    }

    .mobile-menu-toggle {
        display: block;
        width: 100%;
        text-align: right;
        padding: 0.5rem 1rem;
        color: white;
        font-size: 1.5rem;
        background: none;
        border: none;
    }

    .nav-menu {
        display: none;
        width: 100%;
        list-style: none;
        margin: 0;
        padding: 0;
    }

    .nav-menu.active {
        display: block;
    }

    .nav-item {
        width: 100%;
        margin-bottom: 0.25rem;
    }

    .nav-link {
        color: rgba(255, 255, 255, 0.9);
        padding: 1rem;
        display: block;
        font-weight: 600;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }

    .dropdown-menu {
        position: static !important;
        width: 100% !important;
        background-color: rgba(0, 0, 0, 0.2) !important;
        border: none !important;
        box-shadow: none !important;
    }

    .dropdown-item {
        padding-left: 2rem !important;
    }
}

/* Common Improvements */
.dropdown-menu {
    max-height: 70vh;
    overflow-y: auto;
    transition: all 0.3s ease;
}

.user-avatar {
    order: -1;
    margin-right: auto;
}

/* Accessibility Improvements */
.nav-link:focus,
.dropdown-item:focus {
    outline: 2px solid var(--secondary-color);
    outline-offset: 2px;
}

/* Animation for mobile menu */
@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.nav-menu.active {
    animation: slideDown 0.3s ease forwards;
}