.nav {
  position: sticky;
  top: 10px;
  z-index: 999;
  transition: 0.25s;
  max-width: 100%;
  margin: 15px auto 0 auto;
  background: rgba(255, 255, 255, 0.75);
  border-radius: 15px;
  border: 1px solid rgba(255, 255, 255, 0.3);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(5px);
}
@media (max-width: 1200px) {
  .nav {
    max-width: 100%;
  }
}
@media (max-width: 991px) {
  .nav {
    top: 0;
    max-width: 100%;
    border-radius: 0;
  }
}