.signal-spread {
  position: fixed;
  inset: 0;
  z-index: 4;
  width: 100%;
  height: 100%;
  pointer-events: none;
  mix-blend-mode: screen;
  opacity: .7;
  filter: contrast(1.16) saturate(1.12);
  animation: spread-interference 3.9s steps(1, end) infinite;
}

.subliminal-signal {
  position: fixed;
  inset: 0;
  z-index: 8;
  width: 100%;
  height: 100%;
  pointer-events: none;
  visibility: hidden;
  opacity: 0;
  mix-blend-mode: screen;
}

.subliminal-signal.is-active {
  visibility: visible;
  animation: subliminal-takeover 220ms steps(1, end) both;
}

@keyframes spread-interference {
  0%, 13%, 20%, 36%, 43%, 61%, 68%, 83%, 89%, 100% {
    opacity: .64;
    transform: translate(0);
  }
  14% {
    opacity: .24;
    transform: translate(-9px, 2px);
  }
  15% {
    opacity: .9;
    transform: translate(8px, -2px);
  }
  17% {
    opacity: .38;
    transform: translateX(-2px);
  }
  37% {
    opacity: .86;
    transform: translateX(10px);
  }
  39% {
    opacity: .27;
    transform: translateX(-8px);
  }
  62% {
    opacity: .92;
    transform: translate(-10px, 3px);
  }
  64% {
    opacity: .31;
    transform: translate(8px, -3px);
  }
  84% {
    opacity: .88;
    transform: translate(11px, 2px);
  }
  86% {
    opacity: .22;
    transform: translate(-7px, -2px);
  }
}

@keyframes subliminal-takeover {
  0% {
    opacity: 0;
    transform: translateX(-1.2%);
    clip-path: inset(0);
  }
  10% {
    opacity: .95;
    transform: translateX(.7%);
  }
  27% {
    opacity: .22;
    transform: translateX(-.4%);
    clip-path: inset(7% 0 58%);
  }
  43% {
    opacity: .88;
    transform: translateX(.25%);
    clip-path: inset(0);
  }
  61% {
    opacity: .34;
    transform: translateX(-.7%);
    clip-path: inset(42% 0 23%);
  }
  78% {
    opacity: .82;
    transform: translateX(.45%);
    clip-path: inset(0);
  }
  100% {
    visibility: hidden;
    opacity: 0;
    transform: none;
    clip-path: inset(0);
  }
}

@media (max-width: 720px) {
  .signal-spread {
    opacity: .62;
  }
}

@media (prefers-reduced-motion: reduce) {
  .signal-spread {
    opacity: .5;
    animation: none;
  }

  .subliminal-signal {
    display: none;
  }
}