/* Back to Top Button */
    .back-to-top-btn {
        position: fixed;
        bottom: 30px;
        right: 30px;
        background: #20c997;
        color: white;
        width: 50px;
        height: 50px;
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        text-decoration: none;
        box-shadow: 0 4px 15px rgba(32, 201, 151, 0.3);
        transition: all 0.3s ease;
        z-index: 1000;
        opacity: 0;
        visibility: hidden;
    }
    
    .back-to-top-btn.show {
        opacity: 1;
        visibility: visible;
    }
    
    .back-to-top-btn:hover {
        background: #1ba87e;
        transform: translateY(-3px);
        box-shadow: 0 6px 20px rgba(32, 201, 151, 0.4);
    }