/* ===== LOADER & TRANSITIONS CSS ===== */

/* Page Loader */
.page-loader {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(255, 255, 255, 0.95);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 199;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
  backdrop-filter: blur(5px);
}

.page-loader.active {
  opacity: 1;
  visibility: visible;
}

/* Spinner Animation */
.loader-spinner {
  width: 40px;
  height: 40px;
  border: 3px solid #f3f3f3;
  border-top: 3px solid #dc3545;
  border-radius: 50%;
  animation: spin 1s linear infinite;
  box-shadow: 0 4px 12px rgba(220, 53, 69, 0.3);
}

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

/* Content Fade In Animation */
.content-fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: all 0.5s ease;
}

.content-fade-in.loaded {
  opacity: 1;
  transform: translateY(0);
}

/* Staggered Animation for Cards */
.stagger-animation {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.4s ease;
}

.stagger-animation.loaded {
  opacity: 1;
  transform: translateY(0);
}

/* Quick Actions Animation */
.quick-action-card {
  opacity: 0;
  transform: scale(0.9);
  transition: all 0.4s ease;
}

.quick-action-card.loaded {
  opacity: 1;
  transform: scale(1);
}

/* Stats Cards Animation */
.stats-card-animation {
  opacity: 0;
  transform: translateY(20px);
  transition: all 0.4s ease;
}

.stats-card-animation.loaded {
  opacity: 1;
  transform: translateY(0);
}

/* Page Transition Overlay */
.page-transition {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, #dc3545 0%, #c82333 100%);
  z-index: 9998;
  transform: translateX(-100%);
  transition: transform 0.3s ease;
}

.page-transition.active {
  transform: translateX(0);
}

/* Navigation Link Loading States */
.nav-link-loading {
  position: relative;
  overflow: hidden;
}

.nav-link-loading::after {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: left 0.5s ease;
}

.nav-link-loading.loading::after {
  left: 100%;
}

/* Button Loading States */
.btn-loading {
  position: relative;
  overflow: hidden;
}

.btn-loading .btn-text {
  transition: opacity 0.3s ease;
}

.btn-loading.loading .btn-text {
  opacity: 0;
}

.btn-loading .btn-spinner {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 16px;
  height: 16px;
  border: 2px solid transparent;
  border-top: 2px solid currentColor;
  border-radius: 50%;
  animation: spin 1s linear infinite;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.btn-loading.loading .btn-spinner {
  opacity: 1;
}

/* Smooth Page Transitions */
.page-content {
  opacity: 0;
  transform: translateY(10px);
  transition: all 0.4s ease;
}

.page-content.loaded {
  opacity: 1;
  transform: translateY(0);
}

/* Module Layout Transitions */
.module-main-content {
  opacity: 0;
  transform: translateY(15px);
  transition: all 0.5s ease;
}

.module-main-content.loaded {
  opacity: 1;
  transform: translateY(0);
}

/* Sidebar Transitions */
.module-sidebar {
  opacity: 0;
  transform: translateX(-20px);
  transition: all 0.4s ease;
}

.module-sidebar.loaded {
  opacity: 1;
  transform: translateX(0);
}

/* Card Hover Enhancements */
.card {
  transition: all 0.3s ease;
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

/* Form Transitions */
.form-control {
  transition: all 0.3s ease;
}

.form-control:focus {
  transform: scale(1.02);
}

/* Modal Transitions */
.modal.fade .modal-dialog {
  transform: scale(0.8);
  transition: transform 0.3s ease;
}

.modal.show .modal-dialog {
  transform: scale(1);
}

/* Dropdown Transitions */
.dropdown-menu {
  opacity: 0;
  transform: translateY(-10px) scale(0.95);
  transition: all 0.2s ease;
}

.dropdown-menu.show {
  opacity: 1;
  transform: translateY(0) scale(1);
}

/* Loading States for Images */
.image-loading {
  position: relative;
  background: #f8f9fa;
  overflow: hidden;
}

.image-loading::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
  animation: shimmer 1.5s infinite;
}

@keyframes shimmer {
  0% {
    left: -100%;
  }
  100% {
    left: 100%;
  }
}

/* Enhanced Loading States */
.loading-pulse {
  animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

/* Progress Bar for Loading */
.loading-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: #f0f0f0;
  z-index: 10000;
}

.loading-progress-bar {
  height: 100%;
  background: linear-gradient(90deg, #dc3545, #c82333);
  width: 0%;
  transition: width 0.3s ease;
  animation: progress-animation 2s ease-in-out infinite;
}

@keyframes progress-animation {
  0% {
    width: 0%;
  }
  50% {
    width: 70%;
  }
  100% {
    width: 100%;
  }
}

/* Responsive Adjustments */
@media (max-width: 768px) {
  .page-loader {
    background: rgba(255, 255, 255, 0.98);
  }

  .loader-spinner {
    width: 30px;
    height: 30px;
    border-width: 2px;
  }

  .content-fade-in {
    transform: translateY(10px);
  }

  .stagger-animation {
    transform: translateY(15px);
  }
}

/* Dark Theme Support */
@media (prefers-color-scheme: dark) {
  .page-loader {
    background: rgba(0, 0, 0, 0.95);
  }

  .image-loading {
    background: #2d3748;
  }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
  .page-loader,
  .content-fade-in,
  .stagger-animation,
  .quick-action-card,
  .stats-card-animation,
  .module-main-content,
  .module-sidebar,
  .card,
  .form-control,
  .modal-dialog,
  .dropdown-menu {
    transition: none;
    animation: none;
  }

  .loader-spinner {
    animation: none;
  }
}