/* ============================================
   BACKGROUND SNOW & AMBIENT PARTICLE ANIMATION
   ============================================ */

#bgSnowCanvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 1;
  opacity: 1;
  transition: opacity 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

#bgSnowCanvas.snow-hidden {
  opacity: 0;
}

/* Ensure content cards and text remain sharply visible above canvas */
main,
.site-header,
.site-footer,
.announcement-bar,
.modal-overlay,
.floating-whatsapp {
  position: relative;
  z-index: 2;
}

/* Floating Snow Effect Toggle Button */
.snow-toggle-btn {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 9999;
  background: rgba(15, 23, 42, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.18);
  color: #f1f5f9;
  padding: 8px 16px;
  border-radius: 30px;
  cursor: pointer;
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  font-size: 0.8rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 8px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.35), 0 0 15px rgba(99, 102, 241, 0.2);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  user-select: none;
}

.snow-toggle-btn:hover {
  transform: translateY(-2px) scale(1.04);
  background: rgba(30, 41, 59, 0.95);
  border-color: rgba(99, 102, 241, 0.6);
  box-shadow: 0 6px 25px rgba(0, 0, 0, 0.45), 0 0 20px rgba(99, 102, 241, 0.4);
}

.snow-toggle-btn:active {
  transform: translateY(0) scale(0.98);
}

.snow-toggle-btn .snow-icon {
  font-size: 1.1rem;
  line-height: 1;
  display: inline-block;
  animation: snowSpin 12s linear infinite;
}

.snow-toggle-btn.is-disabled .snow-icon {
  animation: none;
  opacity: 0.5;
}

.snow-toggle-btn.is-disabled {
  opacity: 0.7;
  border-color: rgba(255, 255, 255, 0.1);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.25);
}

@keyframes snowSpin {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}

@media (max-width: 768px) {
  .snow-toggle-btn {
    bottom: 75px;
    right: 16px;
    padding: 6px 12px;
    font-size: 0.75rem;
  }
}