/* ============================================================
   MOUSTACHE — VHS / Glitch / Corruption Effects
   All driven by --corruption (0 → 1)
   ============================================================ */

/* ---- VHS SCAN LINES ---- */
#vhs-overlay {
  position: fixed;
  inset: 0;
  z-index: 900;
  pointer-events: none;
  background: repeating-linear-gradient(
    0deg,
    transparent 0px,
    transparent 2px,
    rgba(0, 0, 0, 0.15) 2px,
    rgba(0, 0, 0, 0.15) 4px
  );
  opacity: calc(var(--corruption) * 0.6);
  transition: opacity 1s ease;
  mix-blend-mode: multiply;
}

/* ---- FILM GRAIN ---- */
#grain-overlay {
  position: fixed;
  inset: 0;
  z-index: 899;
  pointer-events: none;
  opacity: calc(0.03 + var(--corruption) * 0.08);
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='1'/%3E%3C/svg%3E");
  background-size: 256px 256px;
  animation: grainShift 0.3s steps(3) infinite;
}

@keyframes grainShift {
  0% {
    transform: translate(0, 0);
  }
  33% {
    transform: translate(-2px, 1px);
  }
  66% {
    transform: translate(1px, -1px);
  }
  100% {
    transform: translate(0, 0);
  }
}

/* ---- GLITCH OVERLAY ---- */
#glitch-overlay {
  position: fixed;
  inset: 0;
  z-index: 910;
  pointer-events: none;
  opacity: 0;
  background: transparent;
}

/* ---- GLITCH CLASS (applied to body) ---- */
body.glitching #glitch-overlay {
  animation: glitchFlash 0.2s steps(2) 1;
}

body.glitching .polaroid-inner img {
  animation: glitchImage 0.2s steps(2) 1;
}

body.glitching .game-hud {
  animation: glitchShift 0.15s steps(3) 1;
}

@keyframes glitchFlash {
  0% {
    opacity: 1;
    background: rgba(204, 32, 32, 0.08);
    clip-path: inset(30% 0 40% 0);
  }
  25% {
    opacity: 1;
    background: rgba(32, 204, 204, 0.05);
    clip-path: inset(60% 0 10% 0);
  }
  50% {
    opacity: 1;
    background: rgba(204, 32, 32, 0.1);
    clip-path: inset(10% 0 70% 0);
  }
  75% {
    opacity: 0;
    background: transparent;
    clip-path: inset(0);
  }
  100% {
    opacity: 0;
  }
}

@keyframes glitchImage {
  0% {
    transform: translateX(-4px) skewX(-1deg);
    filter: hue-rotate(40deg);
  }
  25% {
    transform: translateX(3px) skewX(0.5deg);
    filter: hue-rotate(-20deg);
  }
  50% {
    transform: translateX(-2px);
    filter: saturate(2);
  }
  75% {
    transform: translateX(1px);
    filter: none;
  }
  100% {
    transform: translateX(0);
    filter: none;
  }
}

@keyframes glitchShift {
  0% {
    transform: translateX(-3px);
  }
  33% {
    transform: translateX(2px) skewX(0.5deg);
  }
  66% {
    transform: translateX(-1px);
  }
  100% {
    transform: translateX(0);
  }
}

/* ---- VHS TRACKING DISTORTION ---- */
body.vhs-tracking .polaroid {
  animation: vhsTrack 0.4s steps(4) 1;
}

@keyframes vhsTrack {
  0% {
    transform: translateX(0) skewX(0deg);
  }
  20% {
    transform: translateX(calc(var(--corruption) * 12px))
      skewX(calc(var(--corruption) * 3deg));
  }
  40% {
    transform: translateX(calc(var(--corruption) * -8px))
      skewX(calc(var(--corruption) * -2deg));
  }
  60% {
    transform: translateX(calc(var(--corruption) * 5px))
      skewX(calc(var(--corruption) * 1deg));
  }
  80% {
    transform: translateX(calc(var(--corruption) * -2px));
  }
  100% {
    transform: translateX(0) skewX(0deg);
  }
}

/* ---- SCREEN FLICKER ---- */
body.flickering {
  animation: screenFlicker 0.15s steps(2) 1;
}

@keyframes screenFlicker {
  0% {
    opacity: 1;
  }
  25% {
    opacity: 0.7;
  }
  50% {
    opacity: 1;
  }
  75% {
    opacity: 0.85;
  }
  100% {
    opacity: 1;
  }
}

/* ---- CORRUPTION-DRIVEN CONTINUOUS EFFECTS ---- */

/* Score text glitch at high corruption */
.hud-score .hud-value {
  text-shadow:
    calc(var(--corruption) * 2px) 0 0
      rgba(204, 32, 32, calc(var(--corruption) * 0.5)),
    calc(var(--corruption) * -2px) 0 0
      rgba(32, 204, 204, calc(var(--corruption) * 0.3));
  transition: text-shadow 1s ease;
}

/* Photo color aberration at medium+ corruption */
.polaroid-inner::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    135deg,
    rgba(204, 32, 32, calc(var(--corruption) * 0.1)) 0%,
    transparent 50%,
    rgba(32, 32, 204, calc(var(--corruption) * 0.08)) 100%
  );
  pointer-events: none;
  mix-blend-mode: screen;
  z-index: 1;
}

/* Button border flicker at high corruption */
.btn-answer {
  border-color: var(--amber-dim);
  transition: border-color 0.3s;
}

/* ---- CONSPIRACY POPUP ---- */
.conspiracy-popup {
  position: fixed;
  z-index: 950;
  background: #1a1008;
  border: 2px solid var(--red-string);
  box-shadow:
    inset 0 0 0 1px #2a1f10,
    0 4px 20px rgba(0, 0, 0, 0.6),
    0 0 30px rgba(204, 32, 32, 0.15);
  max-width: 360px;
  width: 90vw;
  font-family: var(--font-data);
  animation: popupIn 0.3s ease both;
}

.conspiracy-popup.dismissing {
  animation: popupOut 0.3s ease both;
}

@keyframes popupIn {
  from {
    opacity: 0;
    transform: translateY(-10px) scale(0.95);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@keyframes popupOut {
  from {
    opacity: 1;
    transform: scale(1);
  }
  to {
    opacity: 0;
    transform: scale(0.9);
  }
}

.popup-titlebar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 10px;
  background: var(--red-string);
  color: #fff;
  font-size: 12px;
  letter-spacing: 0.1em;
}

.popup-close {
  background: none;
  border: 1px solid rgba(255, 255, 255, 0.4);
  color: white;
  width: 18px;
  height: 18px;
  font-size: 14px;
  line-height: 1;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}

.popup-body {
  padding: 16px;
  font-size: 14px;
  color: var(--cream);
  line-height: 1.5;
}

/* ---- TEXT SCRAMBLE ---- */
.scrambling {
  animation: textScrambleGlow 0.1s steps(1) infinite;
}

@keyframes textScrambleGlow {
  0% {
    color: var(--amber-light);
  }
  50% {
    color: var(--red-string);
  }
  100% {
    color: var(--amber-light);
  }
}

/* ---- TRUTH FLASH (Konami code) ---- */
.truth-flash {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  animation: truthFlashAnim 1.5s ease both;
}

.truth-flash::before {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--red-string);
  animation: truthBgFlash 1.5s steps(6) both;
}

@keyframes truthBgFlash {
  0% {
    opacity: 1;
  }
  20% {
    opacity: 0;
  }
  30% {
    opacity: 0.8;
  }
  50% {
    opacity: 0;
  }
  60% {
    opacity: 0.6;
  }
  80% {
    opacity: 0;
  }
  100% {
    opacity: 0;
  }
}

.truth-flash-text {
  position: relative;
  font-family: var(--font-data);
  font-size: clamp(24px, 6vw, 56px);
  color: white;
  letter-spacing: 0.15em;
  text-align: center;
  text-shadow: 0 0 40px rgba(204, 32, 32, 0.8);
  animation: truthTextPulse 1.5s ease both;
}

@keyframes truthTextPulse {
  0% {
    opacity: 0;
    transform: scale(0.8);
  }
  20% {
    opacity: 1;
    transform: scale(1.05);
  }
  80% {
    opacity: 1;
    transform: scale(1);
  }
  100% {
    opacity: 0;
    transform: scale(1.2);
  }
}

@keyframes truthFlashAnim {
  0% {
    opacity: 1;
  }
  90% {
    opacity: 1;
  }
  100% {
    opacity: 0;
  }
}