html {
  scroll-behavior: smooth;
  scroll-duration: 3s;
}

header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  /* additional styles */
}
header {
  opacity: 1;
}
header.transparent {
  border-bottom: 1px solid whitesmoke;
}

.ev {
  width: 75%;
}
#cgis{
  width: 75%;
}