/* ============================================= */
/* LOADING SYSTEM CORE STYLES */
/* ============================================= */

body:not(.loaded) {
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.4s ease, visibility 0s 0.4s;
}

body.loaded {
  opacity: 1;
  visibility: visible;
}

#loading-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--bs-body-bg);
  z-index: 9999;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 1.5rem;
  transition: opacity 0.5s ease, backdrop-filter 0.5s ease;
  backdrop-filter: blur(2px);
}

.loading-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  text-align: center;
  max-width: 80%;
}

.loading-spinner {
  width: 3.5rem;
  height: 3.5rem;
  border: 0.35rem solid rgba(var(--bs-body-color-rgb), 0.1);
  border-top-color: var(--bs-primary);
  border-radius: 50%;
  animation: spin 1s linear infinite, pulse 2s ease-in-out infinite;
}

.loading-text {
  font-size: 1.2rem;
  font-weight: 500;
  color: var(--bs-body-color);
  animation: text-pulse 2s ease-in-out infinite;
}

.loading-progress {
  height: 0.25rem;
  width: 100%;
  background: rgba(var(--bs-body-color-rgb), 0.15);
  border-radius: 0.25rem;
  overflow: hidden;
  margin-top: 0.5rem;
}

.loading-progress::after {
  content: '';
  display: block;
  height: 100%;
  width: 0%;
  background: var(--bs-primary);
  transition: width 0.3s ease;
  border-radius: inherit;
}

/* ============================================= */
/* ANIMATIONS */
/* ============================================= */

@keyframes spin {
  to { transform: rotate(360deg); }
}

@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.05); }
}

@keyframes text-pulse {
  0%, 100% { opacity: 0.8; }
  50% { opacity: 1; }
}

/* ============================================= */
/* DARK MODE ENHANCEMENTS */
/* ============================================= */

[data-bs-theme="dark"] #loading-overlay {
  background: rgba(18, 18, 18, 0.9);
}

[data-bs-theme="dark"] .loading-spinner {
  border-left-color: var(--bs-primary);
}

/* ============================================= */
/* RESPONSIVE ADJUSTMENTS */
/* ============================================= */

@media (max-width: 768px) {
  .loading-spinner {
    width: 2.5rem;
    height: 2.5rem;
  }
  
  .loading-text {
    font-size: 1rem;
  }
}

/* ============================================= */
/* TRANSITION OVERRIDES DURING LOAD */
/* ============================================= */

.theme-loading [data-bs-theme] * {
  transition: none !important;
}
/* Custom GIF spinner adjustment */
#loading-overlay img[src*="ajax-loader"] {
  filter: drop-shadow(0 0 6px rgba(0,0,0,0.2));
}

[data-bs-theme="dark"] #loading-overlay img[src*="ajax-loader"] {
  filter: brightness(0.8) drop-shadow(0 0 6px rgba(255,255,255,0.1));
}