.scroll-arrow {
            position: fixed;
            bottom: 20px;
            right: 20px;
            width: 50px;
            height: 50px;
            background: rgba(0, 0, 0, 0.6);
            color: white;
            border: none;
            border-radius: 50%;
            display: flex;
            justify-content: center;
            align-items: center;
            cursor: pointer;
            z-index: 1000;
            font-size: 20px;
            opacity: 0;
            visibility: hidden;
            transition: opacity 0.3s, visibility 0.3s;
        }

        .scroll-arrow.show {
            opacity: 1;
            visibility: visible;
        }