.navbar {
  position: sticky;     /* Makes it stick */
  top: 10;               /* Stick to the top */
  z-index: 100;        /* Keep it above other elements */
  background: #91608d;  /* Needs background or it becomes transparent */
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 40px;
}