fade-up

<html> <head> <style> html,body { scroll-behavior: smooth; } body { font-family: Arial, Helvetica, sans-serif; font-size: 20px; } #myBtn { display: none; position: fixed; bottom: 20px; right: 30px; z-index: 99; font-size: 18px; border: none; outline: none; background-color: #2B82B8; color: white; cursor: pointer; padding: 15px; border-radius: 4px; } #myBtn:hover { background-color: #C4E8FA; } </style> 
  </head> 
  <body> 
    <button onclick="topFunction()" id="myBtn" title="Go to top">▲</button> 
  <script> // Get the button 
  var mybutton = document.getElementById("myBtn"); 
  // When the user scrolls down 20px from the top of the document, show the button
  window.onscroll = function() {scrollFunction()}; 
    function scrollFunction() { if (document.body.scrollTop > 20 || document.documentElement.scrollTop > 20) { mybutton.style.display = "block"; } else { mybutton.style.display = "none"; } }
  // When the user clicks on the button, scroll to the top of the document
  function topFunction() { document.body.scrollTop = 0; document.documentElement.scrollTop = 0; } 
  </script> 
  </body> 
</html>

الموقع تحت الصيانة 

<h3 style="text-align: center;"><span style="font-size: 30px; color: rgb(16, 24, 40);"><strong>سنعود قريباً</strong></span></h3>

<p style="text-align: center;"><span style="font-size: 20px; color: rgb(71, 84, 103);">عزيزنا الزائر، شكراً لزيارتك لنا ونأسف لتعطل موقعنا حالياً للقيام بالصيانة الضرورية.</span></p>

Under Maintenance

<p style="text-align: center;"><span style="color: rgb(71, 84, 103); font-size: 20px;">Thanks for your patience!</span></p>

<h3 style="text-align: center;"><span style="color: rgb(16, 24, 40);"><strong><span style="font-size: 30px;">Sorry for the inconvenience! We're updating our site and will be back soon.</span></strong></span></h3>

Assistive Tech