.toast-notification {
            position: fixed;
            bottom: 30px;
            right: 30px;
            background-color: var(--white-color);
            box-shadow: var(--shadow-xl);
            border-radius: var(--radius-md);
            padding: 15px 20px;
            z-index: 10000;
            transform: translateX(400px);
            transition: var(--transition-base);
            border-left: 4px solid;
        }

        .toast-notification.show {
            transform: translateX(0);
        }

        .toast-notification.toast-success {
            border-left-color: #28a745;
        }

        .toast-notification.toast-error {
            border-left-color: #dc3545;
        }

        .toast-notification.toast-warning {
            border-left-color: #ffc107;
        }

        .toast-notification.toast-info {
            border-left-color: #17a2b8;
        }

        .toast-content {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .toast-content i {
            font-size: 20px;
        }

        .toast-success .toast-content i {
            color: #28a745;
        }

        .toast-error .toast-content i {
            color: #dc3545;
        }

        .toast-warning .toast-content i {
            color: #ffc107;
        }

        .toast-info .toast-content i {
            color: #17a2b8;
        }

        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 50px;
            height: 50px;
            background-color: var(--dark-color);
            color: var(--white-color);
            border: none;
            border-radius: 50%;
            cursor: pointer;
            box-shadow: var(--shadow-lg);
            display: none;
            align-items: center;
            justify-content: center;
            z-index: 9999;
            transition: var(--transition-base);
        }

        .back-to-top.show {
            display: flex;
        }

        .back-to-top:hover {
            background-color: var(--primary-color);
            color: var(--dark-color);
            transform: translateY(-5px);
        }

        .animate-bounce {
            animation: bounce 0.6s ease;
        }

        @keyframes bounce {
            0%, 100% {
                transform: scale(1);
            }
            50% {
                transform: scale(1.2);
            }
        }