#loader {
    position: fixed;
    inset: 0;
    z-index: 9999;
    background: black;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity 0.8s ease, visibility 0.8s ease;
  }
  
  #loader video {
    width: 100%;
    height: 100%;
    object-fit: cover;
  }
  
  #loader.hidden {
    opacity: 0;
    visibility: hidden;
  }
  
  body.loading {
    overflow: hidden;
  }