.letter-glitch-container {
    position: relative;
    width: 100%;
    height: 100%;
    background-color: transparent;
    overflow: hidden;
  }

  /* full-viewport fixed backdrop: sits above the body bg, behind all content */
  #letter-glitch-bg {
    position: fixed;
    inset: 0;
    z-index: -1;
    pointer-events: none;
    opacity: 0.5;            /* half-transparent so content stays readable */
  }