/* Responsive Navbar Styles */

.navbar {
    position: relative;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    padding: var(--lms-space-4) 0;
    background-color: var(--lms-bg-primary);
    border-bottom: 1px solid var(--lms-border-color);
    transition: all var(--lms-transition-base);
}

.navbar-fixed {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--lms-z-fixed);
    box-shadow: var(--lms-shadow-sm);
}

.navbar-container {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--lms-space-4);
}

/* Brand */
.navbar-brand {
    display: flex;
    align-items: center;
    margin-right: var(--lms-space-6);
}

.brand-link {
    display: flex;
    align-items: center;
    text-decoration: none;
    color: var(--lms-text-primary);
    font-weight: var(--lms-font-weight-semibold);
    font-size: var(--lms-font-size-lg);
    transition: color var(--lms-transition-fast);
}

.brand-link:hover {
    color: var(--lms-primary);
    text-decoration: none;
}

.brand-content {
    display: flex;
    align-items: center;
    color: var(--lms-text-primary);
    font-weight: var(--lms-font-weight-semibold);
    font-size: var(--lms-font-size-lg);
}

.brand-image {
    height: 2rem;
    width: auto;
    margin-right: var(--lms-space-2);
}

.brand-text {
    white-space: nowrap;
}

/* Mobile Menu Toggle */
.navbar-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 2.5rem;
    height: 2.5rem;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
    z-index: var(--lms-z-dropdown);
}

.hamburger-line {
    width: 1.5rem;
    height: 2px;
    background-color: var(--lms-text-primary);
    margin: 2px 0;
    transition: all var(--lms-transition-fast);
    transform-origin: center;
}

.navbar-toggle.active .hamburger-line:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.navbar-toggle.active .hamburger-line:nth-child(2) {
    opacity: 0;
}

.navbar-toggle.active .hamburger-line:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
}

/* Navigation Menu */
.navbar-menu {
    display: flex;
    align-items: center;
    width: 100%;
    justify-content: space-between;
}

.navbar-nav {
    display: flex;
    flex-direction: column;
    list-style: none;
    margin: 0;
    padding: 0;
    width: 100%;
}

.nav-item {
    position: relative;
    margin: 0;
}

.nav-link {
    display: flex;
    align-items: center;
    padding: var(--lms-space-3) var(--lms-space-4);
    color: var(--lms-text-secondary);
    text-decoration: none;
    font-weight: var(--lms-font-weight-medium);
    transition: all var(--lms-transition-fast);
    border-radius: var(--lms-radius-md);
    margin: var(--lms-space-1) 0;
}

.nav-link:hover {
    color: var(--lms-primary);
    background-color: var(--lms-bg-secondary);
    text-decoration: none;
}

.nav-link.active {
    color: var(--lms-primary);
    background-color: var(--lms-bg-secondary);
}

.nav-link i {
    margin-right: var(--lms-space-2);
    width: 1rem;
    text-align: center;
}

/* Dropdown */
.nav-dropdown {
    position: relative;
}

.nav-dropdown-toggle {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    background: none;
    border: none;
    cursor: pointer;
}

.dropdown-icon {
    margin-left: var(--lms-space-2);
    transition: transform var(--lms-transition-fast);
}

.nav-dropdown-toggle[aria-expanded="true"] .dropdown-icon {
    transform: rotate(180deg);
}

.nav-dropdown-menu {
    display: none;
    position: static;
    list-style: none;
    margin: 0;
    padding: var(--lms-space-2) 0;
    background-color: var(--lms-bg-tertiary);
    border-radius: var(--lms-radius-md);
    box-shadow: var(--lms-shadow-sm);
    margin-top: var(--lms-space-1);
}

.nav-dropdown-menu.show {
    display: block;
}

.nav-dropdown-item {
    margin: 0;
}

.nav-dropdown-link {
    display: flex;
    align-items: center;
    padding: var(--lms-space-2) var(--lms-space-4);
    color: var(--lms-text-secondary);
    text-decoration: none;
    font-size: var(--lms-font-size-sm);
    transition: all var(--lms-transition-fast);
    border-radius: var(--lms-radius-sm);
    margin: var(--lms-space-1) var(--lms-space-2);
}

.nav-dropdown-link:hover {
    color: var(--lms-primary);
    background-color: var(--lms-bg-secondary);
    text-decoration: none;
}

.nav-dropdown-link.active {
    color: var(--lms-primary);
    background-color: var(--lms-bg-secondary);
}

.nav-dropdown-link i {
    margin-right: var(--lms-space-2);
    width: 1rem;
    text-align: center;
}

/* Navbar Actions */
.navbar-actions {
    display: flex;
    align-items: center;
    gap: var(--lms-space-2);
    margin-top: var(--lms-space-4);
    padding-top: var(--lms-space-4);
    border-top: 1px solid var(--lms-border-color);
}

/* Navbar Styles */
.navbar-light {
    background-color: var(--lms-bg-primary);
    border-bottom-color: var(--lms-border-color);
}

.navbar-dark {
    background-color: var(--lms-gray-800);
    border-bottom-color: var(--lms-gray-700);
}

.navbar-dark .brand-link,
.navbar-dark .brand-content {
    color: white;
}

.navbar-dark .nav-link {
    color: var(--lms-gray-300);
}

.navbar-dark .nav-link:hover,
.navbar-dark .nav-link.active {
    color: white;
    background-color: var(--lms-gray-700);
}

.navbar-dark .hamburger-line {
    background-color: white;
}

.navbar-transparent {
    background-color: transparent;
    border-bottom: none;
}

/* Responsive Design */
@media (min-width: 768px) {
    .navbar-toggle {
        display: none;
    }

    .navbar-menu {
        flex-direction: row;
        width: auto;
    }

    .navbar-nav {
        flex-direction: row;
        align-items: center;
        width: auto;
    }

    .nav-item {
        margin: 0 var(--lms-space-1);
    }

    .nav-link {
        margin: 0;
        padding: var(--lms-space-2) var(--lms-space-3);
    }

    .nav-dropdown-menu {
        position: absolute;
        top: 100%;
        left: 0;
        min-width: 12rem;
        z-index: var(--lms-z-dropdown);
    }

    .navbar-actions {
        margin-top: 0;
        padding-top: 0;
        border-top: none;
    }
}

@media (min-width: 992px) {
    .navbar-container {
        padding: 0 var(--lms-space-6);
    }

    .nav-link {
        padding: var(--lms-space-3) var(--lms-space-4);
    }
}

/* Mobile Menu Overlay */
@media (max-width: 767px) {
    .navbar-menu {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background-color: var(--lms-bg-primary);
        z-index: var(--lms-z-modal);
        transform: translateX(-100%);
        transition: transform var(--lms-transition-base);
        padding: var(--lms-space-6);
        overflow-y: auto;
    }

    .navbar-menu.active {
        transform: translateX(0);
    }

    .navbar-menu::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        height: 4rem;
        background-color: var(--lms-bg-primary);
        border-bottom: 1px solid var(--lms-border-color);
    }

    .navbar-nav {
        margin-top: 4rem;
    }

    .navbar-toggle {
        display: flex;
        position: relative;
        z-index: calc(var(--lms-z-modal) + 1);
    }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {

    .navbar,
    .nav-link,
    .hamburger-line,
    .dropdown-icon {
        transition: none;
    }
}

/* Focus styles */
.nav-link:focus,
.nav-dropdown-toggle:focus,
.navbar-toggle:focus {
    outline: 2px solid var(--lms-primary);
    outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    .navbar {
        border-bottom-width: 2px;
    }

    .nav-link:hover,
    .nav-link.active {
        background-color: var(--lms-primary);
        color: white;
    }
}