.notification-popup {
            position: fixed;
            z-index: 1000;
            bottom: 20px;
            right: 20px;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            border-radius: 12px;
            padding: 16px 20px;
            box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.1);
            backdrop-filter: blur(10px);
            max-width: 350px;
            min-width: 280px;
            transform: translateX(400px);
            opacity: 0;
            transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
        }

        .notification-popup.show {
            transform: translateX(0);
            opacity: 1;
        }

        .notification-popup .notification-header {
            display: flex;
            align-items: center;
            margin-bottom: 8px;
        }

        .notification-popup .notification-icon {
            width: 24px;
            height: 24px;
            background: rgba(255, 255, 255, 0.2);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-right: 8px;
            font-size: 12px;
            color: #fff;
        }

        .notification-popup .notification-title {
            color: #fff;
            font-weight: 600;
            font-size: 14px;
            opacity: 0.9;
        }

        .notification-popup .notification-content {
            color: #fff;
            font-size: 13px;
            line-height: 1.4;
            margin-bottom: 12px;
        }

        .notification-popup .notification-content b {
            font-weight: 700;
            color: #FFD700;
        }

        .notification-popup .notification-content a {
            color: #FFD700;
            text-decoration: none;
            font-weight: 600;
            border-bottom: 1px solid transparent;
            transition: border-color 0.2s ease;
        }

        .notification-popup .notification-content a:hover {
            border-bottom-color: #FFD700;
        }

        .notification-popup .notification-footer {
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 11px;
            color: rgba(255, 255, 255, 0.7);
        }

        .notification-popup .notification-time {
            font-style: italic;
        }

        .notification-popup .notification-close {
            background: none;
            border: none;
            color: rgba(255, 255, 255, 0.7);
            font-size: 14px;
            cursor: pointer;
            padding: 2px;
            border-radius: 3px;
            transition: color 0.2s ease;
        }

        .notification-popup .notification-close:hover {
            color: #fff;
        }

        .notification-popup .progress-bar {
            position: absolute;
            bottom: 0;
            left: 0;
            height: 3px;
            background: rgba(255, 215, 0, 0.8);
            border-radius: 0 0 12px 12px;
            transition: width linear;
        }

        /* Dark mode adjustments */
        html.dark .notification-popup {
            background: linear-gradient(135deg, #1e3a8a 0%, #3730a3 100%);
            border-color: rgba(255, 255, 255, 0.1);
        }

        /* Mobile responsiveness */
        @media (max-width: 640px) {
            .notification-popup {
                right: 10px;
                bottom: 80px;
                max-width: calc(100vw - 20px);
                min-width: auto;
            }
        }

        /* Animation keyframes */
        @keyframes  slideInRight {
            from {
                transform: translateX(400px);
                opacity: 0;
            }
            to {
                transform: translateX(0);
                opacity: 1;
            }
        }

        @keyframes  slideOutRight {
            from {
                transform: translateX(0);
                opacity: 1;
            }
            to {
                transform: translateX(400px);
                opacity: 0;
            }
        }

        .notification-popup.animate-in {
            animation: slideInRight 0.4s cubic-bezier(0.4, 0, 0.2, 1) forwards;
        }

        .notification-popup.animate-out {
            animation: slideOutRight 0.3s cubic-bezier(0.4, 0, 0.2, 1) forwards;
        }