body {
  padding: 0;
  margin: 0;
}

#preloader {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  display: flex;
  z-index: 9999;
  align-items: center;
  justify-content: center;
  background-color: #f1f5f9;
  opacity: 1;
  transition: opacity 0.5s ease-out;
}

.dark-theme #preloader {
  background-color: #09090b;
}

/* Fade out container contents first */
.preloader-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.4s ease-out, transform 0.4s ease-out;
}

.preloader-container.fade-out {
  opacity: 0;
  transform: translateY(-20px);
}

/* Then hide entire preloader */
#preloader.fade-out {
  opacity: 0;
  pointer-events: none;
}

#preloader .preloader-img {
  width: 180px;
  height: 180px;
  background: url('icon.svg') center / contain no-repeat;
  clip-path: inset(100% 0 0 0);
  animation: reveal-up 1.8s ease-in-out infinite alternate;
  will-change: clip-path;
}

/* Optional loading text */
.preloader-text {
  font-family: system-ui, -apple-system, sans-serif;
  font-size: 0.875rem;
  font-weight: 500;
  color: #64748b;
  opacity: 0;
  animation: fade-in-text 2s ease-in-out 0.5s forwards;
}

.dark-theme .preloader-text {
  color: #94a3b8;
}

/* Keyframe animations */
@keyframes reveal-up {
  0% {
    clip-path: inset(100% 0 0 0);
  }
  100% {
    clip-path: inset(0% 0 0 0);
  }
}

@keyframes fade-in-text {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Smooth pulse animation as fallback */
@keyframes pulse-fallback {
  0%,
  100% {
    opacity: 0.4;
  }
  50% {
    opacity: 1;
  }
}

/* Accessibility: Respect reduced motion preference */
@media (prefers-reduced-motion: reduce) {
  #preloader .preloader-img {
    animation: pulse-fallback 2s ease-in-out infinite;
    clip-path: inset(0 0 0 0);
  }

  .preloader-text {
    animation: none;
    opacity: 1;
    transform: none;
  }

  #preloader {
    transition: none;
  }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  #preloader {
    background-color: Canvas;
    color: CanvasText;
  }

  .preloader-text {
    color: CanvasText;
  }
}

/* Loading spinner alternative for better UX */
.preloader-spinner {
  display: none;
  width: 40px;
  height: 40px;
  border: 3px solid #e2e8f0;
  border-top: 3px solid #1e9cd7;
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin-top: 1rem;
}

.dark-theme .preloader-spinner {
  border-color: #27272a;
  border-top-color: #1e9cd7;
}

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

/* Performance optimizations */
#preloader * {
  backface-visibility: hidden;
  perspective: 1000px;
}