  if (isNowDark) {
          icon.classList.replace('fa-moon', 'fa-sun');
          this.setAttribute('aria-pressed', 'true');
        } else {
          icon.classList.replace('fa-sun', 'fa-moon');
          this.setAttribute('aria-pressed', 'false');
        }
        
        // Save preference
        localStorage.setItem('darkMode', isNowDark);
      });
    })();

    // Back to top button functionality
    const bottomToTop = document.getElementById("scrollBtn");
    const icon =  bottomToTop.querySe