/* ===================== BACK TO TOP BUTTON ===================== */
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 55px;
            height: 55px;
            background: #8c52ff;
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            box-shadow: 0 4px 15px rgba(131, 23, 255, 0.4);
            text-decoration: none;
            z-index: 1000;
            opacity: 0;
            visibility: hidden;
            transition: all 0.4s ease;
            border: 2px solid transparent;
        }

        .back-to-top:hover {
            background: white;
            color: #8c52ff;
            transform: translateY(-5px);
            box-shadow: 0 6px 20px rgba(170, 23, 255, 0.5);
            border-color: #8c52ff;
        }

        .back-to-top.show {
            opacity: 1;
            visibility: visible;
        }

        /* Responsive */
        @media (max-width: 768px) {
            .back-to-top {
                width: 50px;
                height: 50px;
                bottom: 20px;
                right: 20px;
                font-size: 1.3rem;
            }
        }