nav {
  background: linear-gradient(#000000A0, #00000000) no-repeat;
}

nav #backdrop-blur-placeholder {
  position: absolute;
  width: 100%;
  height: 100%;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  z-index: -1;
  inset: 0;
}

a {
  color: white;
  text-decoration: none;
}