html {
    scroll-behavior: smooth;
   }


   #scrollbtn {
    display:none; /* Hidden by default */
    position: fixed; /* Fixed/sticky position */
    bottom: 20px; /* Place the button at the bottom of the page */
    right: 30px; /* Place the button 30px from the right */
    z-index: 99; /* Make sure it does not overlap */
    border: none; /* Remove borders */
    outline: none; /* Remove outline */
    background-color: lightslategray; /* Set a background color */
    color: white; /* Text color */
    cursor: pointer; /* Add a mouse pointer on hover */
    padding: 15px; /* Some padding */
    border-radius: 50px; /* Rounded corners */
    font-size: 12px; /* Increase font size */
  }
  
  #scrollbtn:hover {
    background-color: #555; /* Add a dark-grey background on hover */
  }

  #headder.active {
    box-shadow: 0 0 10px rgba(0,0,0,0.4);   
}