@keyframes screen-shake {
  0%, 100% { transform: translate(0, 0); }
  20% { transform: translate(-6px, 4px); }
  40% { transform: translate(6px, -4px); }
  60% { transform: translate(-4px, -6px); }
  80% { transform: translate(4px, 6px); }
}

.screen-shake {
  animation: screen-shake 320ms ease-in-out;
}

@keyframes principal-danger-pulse {
  0%, 100% { opacity: 0.68; }
  50% { opacity: 1; }
}

.principal-danger-overlay {
  position: absolute;
  z-index: 4;
  inset: 0;
  pointer-events: none;
  opacity: 0;
  box-shadow:
    inset 0 0 48px rgb(255 24 24 / 72%),
    inset 0 0 120px rgb(125 0 0 / 48%);
  transition: opacity 180ms ease-out;
}

.principal-danger-overlay.is-visible {
  opacity: 1;
  animation: principal-danger-pulse 700ms ease-in-out infinite;
}

@keyframes damage-frame-flash {
  0% { opacity: 0; }
  16% { opacity: 1; }
  100% { opacity: 0; }
}

.damage-flash-overlay {
  position: absolute;
  z-index: 6;
  inset: 0;
  pointer-events: none;
  opacity: 0;
  border: clamp(8px, 1.4vw, 22px) solid rgb(255 35 35 / 82%);
  box-shadow:
    inset 0 0 72px rgb(255 0 0 / 92%),
    inset 0 0 180px rgb(105 0 0 / 66%);
}

.damage-flash-overlay.is-visible {
  animation: damage-frame-flash 460ms ease-out forwards;
}

@keyframes hazard-warning-blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.22; }
}

.hazard-warning-overlay {
  position: absolute;
  z-index: 7;
  inset: 0;
  display: grid;
  place-items: center;
  gap: 10px;
  pointer-events: none;
}

.hazard-warning-overlay[hidden] {
  display: none;
}

.hazard-warning-overlay.is-visible .hazard-warning-overlay__icon,
.hazard-warning-overlay.is-visible .hazard-warning-overlay__text {
  animation: hazard-warning-blink 400ms ease-in-out infinite;
}

.hazard-warning-overlay__icon {
  width: clamp(64px, 12vw, 120px);
  height: auto;
  color: #ff2b2b;
  filter:
    drop-shadow(0 0 4px #ff1a1a)
    drop-shadow(0 0 12px #ff1a1a)
    drop-shadow(0 0 26px #ff3b3b);
}

.hazard-warning-overlay__text {
  margin: 0;
  font-family: "Press Start 2P", monospace;
  font-size: clamp(16px, 2.4vw, 28px);
  font-weight: 700;
  letter-spacing: 0.05em;
  color: #ff2b2b;
  text-shadow:
    0 0 6px #ff1a1a,
    0 0 16px #ff1a1a,
    0 0 32px #ff3b3b;
}

@keyframes cringe-flash {
  0% { opacity: 0.6; }
  100% { opacity: 0; }
}

.cringe-flash {
  position: absolute;
  inset: 0;
  background: radial-gradient(circle, rgb(255 60 60 / 55%), rgb(120 0 0 / 80%));
  pointer-events: none;
  z-index: 5;
  animation: cringe-flash 420ms ease-out forwards;
}

@keyframes puzzle-flash-hit {
  0% { box-shadow: inset 0 0 0 6px rgb(215 255 46 / 90%); }
  100% { box-shadow: inset 0 0 24px rgb(0 0 0 / 80%); }
}

@keyframes puzzle-flash-miss {
  0% { box-shadow: inset 0 0 0 6px rgb(255 60 60 / 90%); }
  100% { box-shadow: inset 0 0 24px rgb(0 0 0 / 80%); }
}

@keyframes siren-prompt-pulse {
  0%, 100% { text-shadow: 0 0 8px rgb(255 60 60 / 70%); transform: scale(1); }
  50% { text-shadow: 0 0 18px rgb(255 120 120 / 95%); transform: scale(1.06); }
}

@keyframes stair-dodge-jump {
  0% { transform: translateX(-50%) translateY(0); }
  40% { transform: translateX(-50%) translateY(-96px); }
  100% { transform: translateX(-50%) translateY(0); }
}