html, body {
  margin: 0;
  padding: 0;
  height: 100%;
}

#sticky_headr {
  background-color: black;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  width: 100%;
  transition: all 0.3s ease;
}

#sticky_headr.sticky {
  position: fixed;  /* Make the header fixed when scrolling */
  top: 0;
  left: 0;
  width: 100%;  /* Ensure it stretches across the viewport */
  z-index: 1000;  /* Ensures it stays above other elements */
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.2);  /* Add shadow to the sticky state */
}