/* Modern Navigation Styles */
.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 0;
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding-left: var(--container-padding);
    padding-right: var(--container-padding);
}

.nav-brand a {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--text-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.nav-brand a:hover {
    color: var(--primary-color);
}

.nav-menu-container {
    flex: 1;
    display: flex;
    justify-content: center;
}

.nav-menu {
    display: flex;
    list-style: none;
    align-items: center;
    gap: 2rem;
    margin: 0;
    padding: 0;
}

.nav-menu a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: var(--font-size-sm);
    transition: color var(--transition-fast);
    padding: 0.5rem 0;
    position: relative;
}

.nav-menu a:hover {
    color: var(--text-primary);
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: width var(--transition-normal);
}

.nav-menu a:hover::after {
    width: 100%;
}

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

.nav-dropdown:hover .dropdown-menu {
    display: block;
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background: var(--bg-primary);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    min-width: 400px;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition-normal);
    padding: 1.5rem;
    display: flex;
    gap: 2rem;
}

.dropdown-section {
    flex: 1;
}

.dropdown-section h4 {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border-light);
}

.dropdown-section ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.dropdown-section li {
    margin-bottom: 0.5rem;
}

.dropdown-section a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: var(--font-size-sm);
    transition: color var(--transition-fast);
    padding: 0.5rem 0;
    display: block;
}

.dropdown-section a:hover {
    color: var(--primary-color);
}

/* Navigation Actions */
.nav-actions {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

/* Language Selector */
.language-selector select {
    background: var(--bg-secondary);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    padding: 0.5rem 1rem;
    font-size: var(--font-size-sm);
    color: var(--text-primary);
    cursor: pointer;
    transition: all var(--transition-fast);
    min-width: 120px;
}

.language-selector select:hover {
    border-color: var(--border-medium);
    background: var(--bg-tertiary);
}

.language-selector select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0, 122, 255, 0.1);
}

/* User Menu */
.user-menu {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.auth-buttons {
    display: flex;
    gap: 0.5rem;
}

.btn-outline {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-light);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-md);
    text-decoration: none;
    font-size: var(--font-size-sm);
    font-weight: 500;
    transition: all var(--transition-fast);
}

.btn-outline:hover {
    background: var(--bg-secondary);
    border-color: var(--border-medium);
}

.btn-primary {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-md);
    text-decoration: none;
    font-size: var(--font-size-sm);
    font-weight: 500;
    transition: all var(--transition-fast);
}

.btn-primary:hover {
    background: var(--primary-hover);
    transform: translateY(-1px);
}

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

.user-btn {
    background: var(--bg-secondary);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    padding: 0.5rem 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    font-size: var(--font-size-sm);
    color: var(--text-primary);
}

.user-btn:hover {
    background: var(--bg-tertiary);
    border-color: var(--border-medium);
}

.user-icon {
    font-size: 1.2rem;
}

.dropdown-arrow {
    font-size: 0.8rem;
    transition: transform var(--transition-fast);
}

.user-dropdown:hover .dropdown-arrow {
    transform: rotate(180deg);
}

.user-dropdown:hover .user-dropdown-menu {
    display: block;
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.user-dropdown-menu {
    position: absolute;
    top: 100%;
    right: 0;
    background: var(--bg-primary);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    min-width: 150px;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition-normal);
    padding: 0.5rem 0;
}

.user-dropdown-menu a {
    display: block;
    padding: 0.75rem 1rem;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: var(--font-size-sm);
    transition: background var(--transition-fast);
}

.user-dropdown-menu a:hover {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

/* Mobile Menu Button */
.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.mobile-menu-btn span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: all var(--transition-fast);
}

/* Mobile Menu */
.mobile-menu {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--bg-primary);
    z-index: 2000;
    transform: translateX(-100%);
    transition: transform var(--transition-normal);
    display: flex;
    flex-direction: column;
}

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

.mobile-menu-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem var(--container-padding);
    border-bottom: 1px solid var(--border-light);
}

.mobile-menu-header h3 {
    margin: 0;
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--text-primary);
}

.mobile-menu-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.5rem;
}

.mobile-menu-items {
    list-style: none;
    padding: 0;
    margin: 0;
    flex: 1;
    overflow-y: auto;
}

.mobile-menu-items li {
    border-bottom: 1px solid var(--border-light);
}

.mobile-menu-items a {
    display: block;
    padding: 1rem var(--container-padding);
    color: var(--text-primary);
    text-decoration: none;
    font-size: var(--font-size-base);
    transition: background var(--transition-fast);
}

.mobile-menu-items a:hover {
    background: var(--bg-secondary);
}

.mobile-dropdown-btn {
    width: 100%;
    text-align: left;
    background: none;
    border: none;
    padding: 1rem var(--container-padding);
    color: var(--text-primary);
    font-size: var(--font-size-base);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background var(--transition-fast);
}

.mobile-dropdown-btn:hover {
    background: var(--bg-secondary);
}

.mobile-dropdown-menu {
    list-style: none;
    padding: 0;
    margin: 0;
    background: var(--bg-secondary);
    display: none;
}

.mobile-dropdown.active .mobile-dropdown-menu {
    display: block;
}

.mobile-dropdown-menu li {
    border-bottom: none;
}

.mobile-dropdown-menu a {
    padding-left: 2rem;
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.mobile-menu-footer {
    padding: 1rem var(--container-padding);
    border-top: 1px solid var(--border-light);
    display: flex;
    gap: 1rem;
}

.mobile-menu-footer .btn {
    flex: 1;
    text-align: center;
    padding: 0.75rem 1rem;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .nav-menu-container {
        display: none;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .nav-actions {
        gap: 1rem;
    }
    
    .language-selector select {
        min-width: 100px;
    }
}

@media (max-width: 768px) {
    .nav {
        padding: 0.75rem var(--container-padding);
    }
    
    .nav-brand a {
        font-size: var(--font-size-lg);
    }
    
    .auth-buttons {
        display: none;
    }
    
    .user-menu {
        gap: 0.5rem;
    }
}

@media (max-width: 480px) {
    .nav-actions {
        gap: 0.5rem;
    }
    
    .language-selector select {
        min-width: 80px;
        font-size: var(--font-size-xs);
    }
    
    .user-btn {
        padding: 0.5rem;
    }
    
    .user-name {
        display: none;
    }
}