/* ============================================
   HORROR STORIES – Keyframe Animations
   ============================================ */

/* ── Flicker (lights about to die) ── */
@keyframes flicker {
  0%, 100% { opacity: 1; }
  4% { opacity: 0.9; }
  6% { opacity: 0.85; }
  8% { opacity: 0.95; }
  42% { opacity: 1; }
  44% { opacity: 0.6; }
  46% { opacity: 0.9; }
  70% { opacity: 1; }
  72% { opacity: 0.7; }
  74% { opacity: 0.4; }
  76% { opacity: 0.9; }
  78% { opacity: 1; }
}

/* ── Pulse Glow ── */
@keyframes pulseGlow {
  0%, 100% {
    box-shadow: 0 0 15px rgba(139, 0, 0, 0.3), 0 0 30px rgba(139, 0, 0, 0.15);
  }
  50% {
    box-shadow: 0 0 25px rgba(220, 20, 60, 0.5), 0 0 50px rgba(220, 20, 60, 0.25);
  }
}

@keyframes pulseGlowText {
  0%, 100% {
    text-shadow: 0 0 10px rgba(220, 20, 60, 0.4), 0 0 20px rgba(220, 20, 60, 0.2);
  }
  50% {
    text-shadow: 0 0 20px rgba(220, 20, 60, 0.7), 0 0 40px rgba(220, 20, 60, 0.3), 0 0 60px rgba(220, 20, 60, 0.15);
  }
}

/* ── Float (ghostly hover) ── */
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-15px); }
}

@keyframes floatSlow {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  33% { transform: translateY(-8px) rotate(1deg); }
  66% { transform: translateY(-12px) rotate(-1deg); }
}

/* ── Blood Drip ── */
@keyframes bloodDrip {
  0% {
    transform: scaleY(0);
    transform-origin: top;
    opacity: 0;
  }
  30% {
    opacity: 1;
  }
  100% {
    transform: scaleY(1);
    transform-origin: top;
    opacity: 1;
  }
}

/* ── Fog Drift ── */
@keyframes fogDrift {
  0% { transform: translateX(-100%) scaleX(1.5); }
  100% { transform: translateX(100%) scaleX(1.5); }
}

@keyframes fogPulse {
  0%, 100% { opacity: 0.02; }
  50% { opacity: 0.06; }
}

/* ── Text Glitch ── */
@keyframes glitch {
  0%, 90%, 100% { transform: translate(0); }
  91% { transform: translate(-2px, 1px); }
  92% { transform: translate(2px, -1px); }
  93% { transform: translate(-1px, -1px); }
  94% { transform: translate(1px, 2px); }
  95% { transform: translate(-1px, 1px); }
}

@keyframes glitchColor {
  0%, 90%, 100% {
    text-shadow: none;
  }
  92% {
    text-shadow: -2px 0 var(--color-crimson), 2px 0 var(--color-purple-glow);
  }
  94% {
    text-shadow: 2px 0 var(--color-crimson), -2px 0 var(--color-purple-glow);
  }
  96% {
    text-shadow: -1px 0 var(--color-crimson), 1px 0 var(--color-purple-glow);
  }
}

/* ── Fade & Slide reveals ── */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes fadeSlideUp {
  from {
    opacity: 0;
    transform: translateY(40px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeSlideDown {
  from {
    opacity: 0;
    transform: translateY(-30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeSlideLeft {
  from {
    opacity: 0;
    transform: translateX(40px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes fadeSlideRight {
  from {
    opacity: 0;
    transform: translateX(-40px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

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

/* ── Typewriter ── */
@keyframes typewriter {
  from { width: 0; }
  to { width: 100%; }
}

@keyframes blink {
  0%, 100% { border-color: var(--color-crimson); }
  50% { border-color: transparent; }
}

/* ── Spin & Rotate ── */
@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

@keyframes spinSlow {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* ── Border crawl ── */
@keyframes borderGlow {
  0% {
    border-color: rgba(139, 0, 0, 0.3);
  }
  50% {
    border-color: rgba(220, 20, 60, 0.6);
  }
  100% {
    border-color: rgba(139, 0, 0, 0.3);
  }
}

/* ── Shimmer loading ── */
@keyframes shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

/* ── Heartbeat ── */
@keyframes heartbeat {
  0%, 100% { transform: scale(1); }
  14% { transform: scale(1.1); }
  28% { transform: scale(1); }
  42% { transform: scale(1.1); }
  56% { transform: scale(1); }
}

/* ── Scroll Reveal Classes ── */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}

.reveal-left {
  opacity: 0;
  transform: translateX(-40px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}
.reveal-left.revealed {
  opacity: 1;
  transform: translateX(0);
}

.reveal-right {
  opacity: 0;
  transform: translateX(40px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}
.reveal-right.revealed {
  opacity: 1;
  transform: translateX(0);
}

.reveal-scale {
  opacity: 0;
  transform: scale(0.85);
  transition: opacity 0.8s ease, transform 0.8s ease;
}
.reveal-scale.revealed {
  opacity: 1;
  transform: scale(1);
}

/* Stagger children — CSS fallback only. GSAP overrides with inline styles. */
.no-gsap .stagger-children > * {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.no-gsap .stagger-children.revealed > *:nth-child(1) { transition-delay: 0.1s; opacity: 1; transform: translateY(0); }
.no-gsap .stagger-children.revealed > *:nth-child(2) { transition-delay: 0.2s; opacity: 1; transform: translateY(0); }
.no-gsap .stagger-children.revealed > *:nth-child(3) { transition-delay: 0.3s; opacity: 1; transform: translateY(0); }
.no-gsap .stagger-children.revealed > *:nth-child(4) { transition-delay: 0.4s; opacity: 1; transform: translateY(0); }
.no-gsap .stagger-children.revealed > *:nth-child(5) { transition-delay: 0.5s; opacity: 1; transform: translateY(0); }
.no-gsap .stagger-children.revealed > *:nth-child(6) { transition-delay: 0.6s; opacity: 1; transform: translateY(0); }

/* Utility animation classes */
.anim-flicker { animation: flicker 4s infinite; }
.anim-pulse-glow { animation: pulseGlow 3s ease-in-out infinite; }
.anim-pulse-text { animation: pulseGlowText 3s ease-in-out infinite; }
.anim-float { animation: float 5s ease-in-out infinite; }
.anim-float-slow { animation: floatSlow 8s ease-in-out infinite; }
.anim-glitch { animation: glitch 6s infinite, glitchColor 6s infinite; }
.anim-spin-slow { animation: spinSlow 30s linear infinite; }
.anim-heartbeat { animation: heartbeat 2s ease-in-out infinite; }
.anim-border-glow { animation: borderGlow 3s ease-in-out infinite; }

/* ── Reduced Motion ── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .reveal, .reveal-left, .reveal-right, .reveal-scale {
    opacity: 1;
    transform: none;
  }
}