/* Nur der Schnecki-Bereich. Keine globalen body-, div-, p- oder img-Regeln. */
.schnecki-reveal {
  --schnecki-ratio: 1;
  box-sizing: border-box;
  position: relative;
  isolation: isolate;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  place-items: center;
  inline-size: 100%;
  min-inline-size: 0;
  min-block-size: 100vh;
  min-block-size: 100svh;
  margin: 0;
  padding: 24px;
  overflow: hidden;
  background: #000;
}

.schnecki-reveal__frame {
  position: relative;
  min-inline-size: 0;
  inline-size: min(82vw, 42.5rem, calc(72vh * var(--schnecki-ratio)));
  inline-size: min(82vw, 42.5rem, calc(72svh * var(--schnecki-ratio)));
  max-inline-size: 100%;
  aspect-ratio: var(--schnecki-ratio);
  margin: 0;
  padding: 0;
}

/* Flächiges Wetterleuchten: kein Lichtkegel und kein Verlauf am Logo. */
.schnecki-lightning {
  --schnecki-light: 13;
  --schnecki-duration: 2.8s;
  position: relative;
  isolation: isolate;
}

.schnecki-lightning::before {
  content: "";
  position: absolute;
  z-index: -1;
  inset: 0;
  pointer-events: none;
  background: rgb(var(--schnecki-light), var(--schnecki-light), var(--schnecki-light));
  opacity: 0;
}

.schnecki-reveal__image {
  display: block;
  position: absolute;
  z-index: 1;
  inset: 0;
  inline-size: 100%;
  block-size: 100%;
  max-inline-size: 100%;
  margin: 0;
  padding: 0;
  border: 0;
  border-radius: 0;
  object-fit: contain;
}

.schnecki-lightning[data-schnecki-revealing]::before {
  animation: schnecki-background-lightning var(--schnecki-duration) steps(1, end) both;
}

/* 700 ms dunkel → 84 ms Blitz → 196 ms dunkel → 84 ms Blitz
   → 672 ms Pause → 308 ms Blitz → dunkel. Keine Wiederholung. */
@keyframes schnecki-background-lightning {
  0% { opacity: 0; }
  25% { opacity: 0.7; }
  28% { opacity: 0; }
  35% { opacity: 1; }
  38% { opacity: 0; }
  62% { opacity: 1; }
  73%, 100% { opacity: 0; }
}

@media (prefers-reduced-motion: reduce) {
  .schnecki-lightning[data-schnecki-revealing]::before {
    animation: none;
    opacity: 1;
  }
}