width: 32px;
                height: 32px;
                border-radius: 50%;
                object-fit: cover;
                border: 1px solid rgba(0, 0, 0, 0.1);
            }
            .nav-user-placeholder {
                width: 32px;
                height: 32px;
                border-radius: 50%;
                display: inline-flex;
                align-items: center;
                justify-content: center;
                background: #dee2e6;
                color: #6c757d;
                font-size: 0.9rem;
            }
            .user-dropdown {
                min-width: 260px;
            }
            .user-dropdown-header {
                background: var(--user-theme-primary, #0d6efd);
                color: #fff;
                padding: 16px;
                text-align: center;
            }
            .user-dropdown-img {
                width: 72px;
                height: 72px;
                border-radius: 50%;
                border: 3px solid #fff;
                object-fit: cover;
                margin-bottom: 8px;
            }
            .user-dropdown-placeholder {
                display: inline-flex;
                align-items: center;
                justify-content: center;
                background: rgba(255, 255, 255, 0.25);
                color: #fff;
                font-size: 1.5rem;
            }
            .user-dropdown-name {
                font-weight: 600;
            }
            .user-dropdown-meta {
                font-size: 0.8rem;
                opacity: 0.9;
            }
            .announcement-item {
                max-width: 320px;
                white-space: normal;
            }
            .announcement-meta {
                color: #6c757d;
                font-size: 0.78rem;
            }
            .announcement-message {
                font-size: 0.85rem;
                color: #1f2937;
                display: -webkit-box;
                -webkit-line-clamp: 2;
                -webkit-box-orient: vertical;
                overflow: hidden;
            }
            .sidebar-user-avatar {