/* ============================================
   Halloween Entrance Animation
   Cinematic • Aesthetic • Spooky • Modern
   ============================================ */

/* --- Overlay & Darkness --- */
.hw-overlay {
  position: fixed;
  inset: 0;
  z-index: 9999;
  pointer-events: none;
  overflow: hidden;
  will-change: opacity;
}

.hw-darkness {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 30% 20%, rgba(90, 40, 120, 0.15) 0%, transparent 50%),
    radial-gradient(ellipse at 70% 80%, rgba(180, 100, 30, 0.1) 0%, transparent 50%),
    radial-gradient(ellipse at center, rgba(12, 8, 5, 0.75) 0%, rgba(5, 2, 0, 0.92) 100%);
  opacity: 0;
  transition: opacity 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}
.hw-darkness.active { opacity: 1; }
.hw-darkness.fade-out {
  opacity: 0;
  transition: opacity 1.2s cubic-bezier(0.4, 0, 0.2, 1);
}

/* --- Fog / Mist --- */
.hw-fog {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity 0.8s ease;
}
.hw-fog.active { opacity: 1; }
.hw-fog.fade-out { opacity: 0; transition: opacity 1s ease; }

.hw-fog-layer {
  position: absolute;
  inset: -20%;
  background:
    radial-gradient(ellipse at 15% 85%, rgba(139, 92, 246, 0.07) 0%, transparent 45%),
    radial-gradient(ellipse at 85% 15%, rgba(217, 119, 6, 0.05) 0%, transparent 45%),
    radial-gradient(ellipse at 50% 50%, rgba(255, 255, 255, 0.02) 0%, transparent 60%);
  animation: hw-fog-drift 6s ease-in-out infinite alternate;
  will-change: transform;
}
.hw-fog-layer:nth-child(2) {
  animation-delay: -3s;
  animation-direction: alternate-reverse;
  opacity: 0.7;
}

@keyframes hw-fog-drift {
  0% { transform: translate(-15px, 8px) scale(1); }
  100% { transform: translate(15px, -8px) scale(1.03); }
}

/* --- Spider Base --- */
.hw-spider {
  position: absolute;
  opacity: 0;
  filter: drop-shadow(0 4px 12px rgba(0, 0, 0, 0.6))
          drop-shadow(0 0 20px rgba(217, 166, 55, 0.15));
  will-change: transform, opacity;
  transition: filter 0.3s ease;
}
.hw-spider svg { display: block; }

/* Leg walking animation */
.hw-spider .hw-legs-left {
  animation: hw-legs-walk-l 0.3s ease-in-out infinite alternate;
  transform-origin: center;
}
.hw-spider .hw-legs-right {
  animation: hw-legs-walk-r 0.3s ease-in-out infinite alternate;
  transform-origin: center;
}
@keyframes hw-legs-walk-l {
  0% { transform: rotate(-3deg); }
  100% { transform: rotate(3deg); }
}
@keyframes hw-legs-walk-r {
  0% { transform: rotate(3deg); }
  100% { transform: rotate(-3deg); }
}

.hw-spider.arrived .hw-legs-left,
.hw-spider.arrived .hw-legs-right {
  animation: none;
}

/* --- Spider Entry Animations --- */
@keyframes hw-enter-top {
  0% { transform: translateY(-250px) rotate(-15deg) scale(0.6); opacity: 0; }
  50% { opacity: 1; }
  70% { transform: translateY(12px) rotate(4deg) scale(1.05); opacity: 1; }
  85% { transform: translateY(-6px) rotate(-2deg) scale(0.97); }
  100% { transform: translateY(0) rotate(0) scale(1); opacity: 1; }
}

@keyframes hw-enter-left {
  0% { transform: translateX(-280px) rotate(25deg) scale(0.5); opacity: 0; }
  50% { opacity: 1; }
  70% { transform: translateX(15px) rotate(-6deg) scale(1.03); opacity: 1; }
  85% { transform: translateX(-8px) rotate(3deg) scale(0.98); }
  100% { transform: translateX(0) rotate(0) scale(1); opacity: 1; }
}

@keyframes hw-enter-right {
  0% { transform: translateX(280px) rotate(-25deg) scale(0.5); opacity: 0; }
  50% { opacity: 1; }
  70% { transform: translateX(-15px) rotate(6deg) scale(1.03); opacity: 1; }
  85% { transform: translateX(8px) rotate(-3deg) scale(0.98); }
  100% { transform: translateX(0) rotate(0) scale(1); opacity: 1; }
}

@keyframes hw-enter-bottom-l {
  0% { transform: translateY(250px) translateX(-60px) rotate(20deg) scale(0.5); opacity: 0; }
  50% { opacity: 1; }
  70% { transform: translateY(-10px) translateX(8px) rotate(-5deg) scale(1.04); opacity: 1; }
  85% { transform: translateY(5px) translateX(-4px) rotate(2deg) scale(0.98); }
  100% { transform: translateY(0) translateX(0) rotate(0) scale(1); opacity: 1; }
}

@keyframes hw-enter-bottom-r {
  0% { transform: translateY(250px) translateX(60px) rotate(-20deg) scale(0.5); opacity: 0; }
  50% { opacity: 1; }
  70% { transform: translateY(-10px) translateX(-8px) rotate(5deg) scale(1.04); opacity: 1; }
  85% { transform: translateY(5px) translateX(4px) rotate(-2deg) scale(0.98); }
  100% { transform: translateY(0) translateX(0) rotate(0) scale(1); opacity: 1; }
}

/* --- Spider Wiggle (Spooky Applause) --- */
@keyframes hw-wiggle {
  0%, 100% { transform: rotate(0deg) scale(1); }
  10% { transform: rotate(-10deg) scale(1.08); }
  20% { transform: rotate(8deg) scale(0.95); }
  30% { transform: rotate(-6deg) scale(1.05); }
  40% { transform: rotate(5deg) scale(0.97); }
  50% { transform: rotate(-3deg) scale(1.02); }
  60% { transform: rotate(2deg) scale(0.99); }
  70% { transform: rotate(-1deg) scale(1.01); }
  80% { transform: rotate(1deg) scale(1); }
}

.hw-spider.wiggle {
  animation: hw-wiggle 0.8s cubic-bezier(0.36, 0.07, 0.19, 0.97) forwards;
}

/* --- Spider Exit --- */
@keyframes hw-exit-top {
  to { transform: translateY(-300px) rotate(-20deg) scale(0.3); opacity: 0; }
}
@keyframes hw-exit-left {
  to { transform: translateX(-300px) rotate(15deg) scale(0.3); opacity: 0; }
}
@keyframes hw-exit-right {
  to { transform: translateX(300px) rotate(-15deg) scale(0.3); opacity: 0; }
}
@keyframes hw-exit-bottom {
  to { transform: translateY(300px) scale(0.3); opacity: 0; }
}
@keyframes hw-exit-corner-tl {
  to { transform: translate(-200px, -200px) rotate(30deg) scale(0.2); opacity: 0; }
}

/* --- Web Strands --- */
.hw-strand-svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.hw-strand {
  stroke: rgba(255, 255, 255, 0.12);
  stroke-width: 1;
  fill: none;
  stroke-dasharray: 500;
  stroke-dashoffset: 500;
  filter: drop-shadow(0 0 3px rgba(217, 166, 55, 0.1));
}
.hw-strand.draw {
  animation: hw-draw-strand 1.2s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}
.hw-strand.fade-out {
  animation: hw-strand-fade 0.8s ease forwards;
}

@keyframes hw-draw-strand {
  to { stroke-dashoffset: 0; }
}
@keyframes hw-strand-fade {
  to { opacity: 0; }
}

/* --- Particles: Golden Glow --- */
.hw-particle {
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
  will-change: transform, opacity;
}

.hw-glow {
  background: radial-gradient(circle, rgba(217, 166, 55, 0.9) 0%, rgba(217, 166, 55, 0) 70%);
}
.hw-glow.animate {
  animation: hw-float-glow var(--dur, 3s) var(--delay, 0s) ease-in-out infinite alternate;
}

@keyframes hw-float-glow {
  0% { transform: translate(0, 0) scale(0.8); opacity: 0; }
  20% { opacity: 0.7; }
  50% { transform: translate(var(--dx, 15px), var(--dy, -25px)) scale(1.2); opacity: 1; }
  80% { opacity: 0.5; }
  100% { transform: translate(var(--dx2, -10px), var(--dy2, -40px)) scale(0.9); opacity: 0; }
}

/* --- Particles: Dust --- */
.hw-dust {
  background: rgba(200, 175, 140, 0.5);
}
.hw-dust.animate {
  animation: hw-float-dust var(--dur, 4s) var(--delay, 0s) ease-in-out infinite;
}

@keyframes hw-float-dust {
  0%, 100% { transform: translateY(0) translateX(0) scale(1); opacity: 0; }
  10% { opacity: 0.4; }
  50% { transform: translateY(var(--dy, -30px)) translateX(var(--dx, 12px)) scale(1.2); opacity: 0.6; }
  90% { opacity: 0.2; }
}

/* --- Mini Bats --- */
.hw-bat {
  position: absolute;
  opacity: 0;
  will-change: transform, opacity;
  filter: drop-shadow(0 2px 6px rgba(0, 0, 0, 0.5));
}
.hw-bat.fly {
  animation: hw-bat-enter 0.5s ease forwards, hw-bat-fly var(--dur, 4s) 0.5s linear forwards;
}

@keyframes hw-bat-enter {
  from { opacity: 0; transform: scale(0.3); }
  to { opacity: 0.55; transform: scale(1); }
}

@keyframes hw-bat-fly {
  0% { transform: translate(0, 0); }
  20% { transform: translate(calc(var(--mx) * 0.2), calc(var(--my) * 0.3 - 15px)); }
  40% { transform: translate(calc(var(--mx) * 0.45), calc(var(--my) * 0.15 + 10px)); }
  60% { transform: translate(calc(var(--mx) * 0.65), calc(var(--my) * 0.5 - 20px)); }
  80% { transform: translate(calc(var(--mx) * 0.85), calc(var(--my) * 0.35 + 8px)); opacity: 0.4; }
  100% { transform: translate(var(--mx), var(--my)); opacity: 0; }
}

/* Bat wing flap */
.hw-bat svg .hw-wing-l {
  animation: hw-flap-l 0.2s ease-in-out infinite alternate;
  transform-origin: 50% 50%;
}
.hw-bat svg .hw-wing-r {
  animation: hw-flap-r 0.2s ease-in-out infinite alternate;
  transform-origin: 50% 50%;
}
@keyframes hw-flap-l {
  0% { transform: rotate(0deg) scaleY(1); }
  100% { transform: rotate(-15deg) scaleY(0.85); }
}
@keyframes hw-flap-r {
  0% { transform: rotate(0deg) scaleY(1); }
  100% { transform: rotate(15deg) scaleY(0.85); }
}

/* --- Golden Flash --- */
.hw-flash {
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 50% 45%, rgba(217, 166, 55, 0.25) 0%, transparent 55%);
  opacity: 0;
  animation: hw-flash-pulse 0.6s ease-out forwards;
}
@keyframes hw-flash-pulse {
  0% { opacity: 0; transform: scale(0.8); }
  40% { opacity: 1; }
  100% { opacity: 0; transform: scale(1.5); }
}

/* --- Vignette --- */
.hw-vignette {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at center, transparent 40%, rgba(5, 2, 0, 0.4) 100%);
  opacity: 0;
  transition: opacity 0.6s ease;
}
.hw-vignette.active { opacity: 1; }
.hw-vignette.fade-out { opacity: 0; transition: opacity 1s ease; }

/* --- Mute Button --- */
.hw-mute-btn {
  position: fixed;
  bottom: 80px;
  right: 20px;
  z-index: 10001;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: rgba(20, 12, 8, 0.85);
  border: 1.5px solid rgba(217, 166, 55, 0.35);
  color: #d4a637;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: all 0.3s ease;
  pointer-events: auto;
  font-size: 18px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.4);
  opacity: 0;
  animation: hw-mute-appear 0.5s 0.5s ease forwards;
}
.hw-mute-btn:hover {
  background: rgba(40, 25, 15, 0.95);
  border-color: rgba(217, 166, 55, 0.7);
  transform: scale(1.1);
  box-shadow: 0 4px 20px rgba(217, 166, 55, 0.2);
}
.hw-mute-btn.hide {
  opacity: 0 !important;
  pointer-events: none;
  transition: opacity 0.5s ease;
}

@keyframes hw-mute-appear {
  from { opacity: 0; transform: scale(0.5); }
  to { opacity: 1; transform: scale(1); }
}

/* --- Page darkening during intro --- */
.hw-page-darken {
  filter: brightness(0.7);
  transition: filter 0.5s ease;
}
.hw-page-darken.reveal {
  filter: brightness(1);
  transition: filter 1s ease;
}

/* --- Responsive --- */
@media (max-width: 640px) {
  .hw-spider { transform: scale(0.7); }
  .hw-mute-btn { width: 36px; height: 36px; font-size: 15px; bottom: 70px; right: 12px; }
}