/* Optimized Header Styles */
    .announcement-bar {
        background-color: #ff6b6b;
        color: white;
        text-align: center;
        padding: 8px 0;
        font-size: 0.85rem;
    }
    
    .announcement-bar a {
        color: white;
        font-weight: bold;
        text-decoration: underline;
    }
    
    .main-navbar {
        padding: 8px 0;
        transition: all 0.3s ease;
        box-shadow: 0 2px 15px rgba(0,0,0,0.1);
    }
    
    .navbar-container {
        display: flex;
        align-items: center;
        justify-content: space-between;
        max-width: 1200px;
        margin: 0 auto;
        padding: 0 15px;
    }
    
    .navbar-brand {
        display: flex;
        align-items: center;
        text-decoration: none;
    }
    
    .logo-img {
        width: 40px;
        height: 40px;
        margin-right: 10px;
    }
    
    .brand-name {
        font-size: 1.3rem;
        font-weight: 700;
        color: #333;
    }
    
    .nav-menu {
        display: flex;
        list-style: none;
        margin: 0;
        padding: 0;
    }
    
    .nav-item {
        position: relative;
    }
    
    .nav-link {
        display: flex;
        align-items: center;
        padding: 8px 12px;
        text-decoration: none;
        color: #333;
        font-size: 0.9rem;
        transition: all 0.2s;
    }
    
    .nav-link:hover {
        color: #007bff;
    }
    
    .nav-link i {
        margin-right: 5px;
        font-size: 0.9rem;
    }
    
    .dropdown-menu {
        position: absolute;
        top: 100%;
        left: 0;
        background: white;
        box-shadow: 0 5px 15px rgba(0,0,0,0.1);
        border-radius: 5px;
        min-width: 160px;
        z-index: 1000;
        display: none;
    }
    
    .nav-item:hover .dropdown-menu {
        display: block;
    }
    
    .dropdown-item {
        display: block;
        padding: 8px 15px;
        color: #333;
        text-decoration: none;
        font-size: 0.85rem;
        transition: all 0.2s;
    }
    
    .dropdown-item:hover {
        background-color: #f8f9fa;
    }
    
    .dropdown-item i {
        font-size: 0.8rem;
        margin-right: 5px;
    }
    
    .user-controls {
        display: flex;
        align-items: center;
    }
    
    .user-greeting {
        font-size: 0.85rem;
        margin-right: 10px;
        color: #333;
    }
    
    .auth-btn {
        padding: 6px 15px;
        font-size: 0.85rem;
        border-radius: 4px;
        text-decoration: none;
        margin-left: 8px;
        transition: all 0.2s;
    }
    
    .btn-primary {
        background-color: #007bff;
        color: white;
        border: 1px solid #007bff;
    }
    
    .btn-primary:hover {
        background-color: #0069d9;
        border-color: #0062cc;
    }
    
    .btn-outline {
        background-color: transparent;
        color: #007bff;
        border: 1px solid #007bff;
    }
    
    .btn-outline:hover {
        background-color: #f8f9fa;
    }
    
    .mobile-menu-btn {
        display: none;
        background: none;
        border: none;
        font-size: 1.2rem;
        cursor: pointer;
        padding: 5px 10px;
    }
    
    .mobile-menu-overlay {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: rgba(0,0,0,0.5);
        z-index: 900;
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s;
    }
    
    .mobile-menu-overlay.active {
        opacity: 1;
        visibility: visible;
    }
    
    /* Mobile Optimization */
    @media (max-width: 992px) {
        .navbar-brand {
            flex: 1;
        }
        
        .brand-name {
            font-size: 1.2rem;
        }
        
        .mobile-menu-btn {
            display: block;
        }
        
        .nav-menu {
            position: fixed;
            top: 0;
            right: -280px;
            width: 280px;
            height: 100vh;
            background: white;
            flex-direction: column;
            padding: 20px;
            z-index: 1000;
            transition: all 0.3s;
            overflow-y: auto;
        }
        
        .nav-menu.active {
            right: 0;
        }
        
        .nav-item {
            width: 100%;
            margin-bottom: 5px;
        }
        
        .nav-link {
            padding: 10px 15px;
            border-radius: 4px;
        }
        
        .dropdown-menu {
            position: static;
            box-shadow: none;
            display: none;
            width: 100%;
            margin-top: 5px;
            padding-left: 15px;
        }
        
        .mobile-auth-buttons {
            display: flex;
            flex-direction: column;
            margin-top: 10px;
        }
        
        .mobile-auth-buttons .nav-link {
            margin-bottom: 5px;
            background-color: #f8f9fa;
            text-align: center;
        }
        
        .mobile-auth-buttons .nav-link:first-child {
            background-color: #007bff;
            color: white;
        }
        
        .user-controls {
            display: none;
        }
    }
    
    @media (max-width: 768px) {
        .brand-name {
            font-size: 1.1rem;
        }
        
        .logo-img {
            width: 35px;
            height: 35px;
        }
    }