#loading-indicator {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.8);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

.loading-spinner {
    width: 50px;
    height: 50px;
    border: 5px solid #f3f3f3;
    border-radius: 50%;
    border-top: 5px solid #3498db;
    animation: spin 1s linear infinite;
}

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

#loading-indicator p {
    margin-top: 10px;
    font-size: 16px;
    color: #333;
}

.action-btn { display: inline-flex; align-items: center; gap: 6px; vertical-align: middle; }
.action-btn i { width: 1.25rem; text-align: center; font-size: 0.95rem; line-height: 1; transition: color 0.2s ease; }

.icon-btn { display: inline-flex; align-items: center; justify-content: center; width: 32px; height: 32px; border-radius: 50%; transition: transform 0.2s ease, background 0.2s ease, color 0.2s ease; will-change: transform; }
.icon-btn i { width: 1rem; text-align: center; line-height: 1; }
.icon-btn:hover { transform: scale(1.06); }

.notif-icon { display: inline-flex; align-items: center; justify-content: center; width: 28px; height: 28px; border-radius: 50%; }

button i, .btn i { width: 1.25rem; text-align: center; line-height: 1; }

/* Avoid hover shifting of nav links */
.nav a { will-change: background; }
.nav a:hover, .nav a.active { box-shadow: inset 0 0 0 999px rgba(255,255,255,0.2); transform: none; }

:root {
  --primary-50: #f0f9ff;
  --primary-100: #e0f2fe;
  --primary-200: #bae6fd;
  --primary-300: #7dd3fc;
  --primary-400: #38bdf8;
  --primary-500: #0ea5e9;
  --primary-600: #0284c7;
  --primary-700: #0369a1;
  --primary-800: #075985;
  --primary-900: #0c4a6e;
  --secondary-50: #f8fafc;
  --secondary-100: #f1f5f9;
  --secondary-200: #e2e8f0;
  --secondary-300: #cbd5e1;
  --secondary-400: #94a3b8;
  --secondary-500: #64748b;
  --secondary-600: #475569;
  --secondary-700: #334155;
  --secondary-800: #1e293b;
  --secondary-900: #0f172a;
  --success-500: #10b981;
  --warning-500: #f59e0b;
  --error-500: #ef4444;
  --info-500: #3b82f6;
  --gradient-primary: linear-gradient(135deg, var(--primary-600), var(--primary-800));
  --gradient-secondary: linear-gradient(135deg, var(--secondary-600), var(--secondary-800));
  --gradient-card: linear-gradient(135deg, #ffffff, #f8fafc);
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --spacing-1: 0.25rem;
  --spacing-2: 0.5rem;
  --spacing-3: 0.75rem;
  --spacing-4: 1rem;
  --spacing-5: 1.25rem;
  --spacing-6: 1.5rem;
  --spacing-8: 2rem;
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;
  --transition-fast: 0.15s ease-in-out;
  --transition-normal: 0.3s ease-in-out;
}

.btn { display: inline-flex; align-items: center; justify-content: center; gap: var(--spacing-2); padding: var(--spacing-3) var(--spacing-5); border: none; border-radius: var(--radius-lg); font-weight: 600; font-size: var(--font-size-base); text-decoration: none; cursor: pointer; transition: all var(--transition-normal); min-height: 44px; }
.btn-primary { background: var(--gradient-primary); color: #fff; box-shadow: var(--shadow-md); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: var(--shadow-lg); }
.btn-outline { background: transparent; color: var(--primary-600); border: 2px solid var(--primary-600); }
.btn-outline:hover { background: var(--primary-600); color: #fff; }
.btn-lg { padding: var(--spacing-4) var(--spacing-6); font-size: var(--font-size-lg); border-radius: var(--radius-xl); }

.form-group { margin-bottom: var(--spacing-5); }
.form-label { display: block; margin-bottom: var(--spacing-2); font-weight: 600; color: var(--secondary-700); font-size: var(--font-size-sm); }
.form-input, .form-control { width: 100%; padding: var(--spacing-3) var(--spacing-4); border: 2px solid var(--secondary-200); border-radius: var(--radius-lg); font-size: var(--font-size-base); background: #fff; }
.form-input:focus, .form-control:focus { outline: none; border-color: var(--primary-500); box-shadow: 0 0 0 3px rgba(14,165,233,0.1); }

.modal { display: none; position: fixed; z-index: 2000; left: 0; top: 0; width: 100%; height: 100%; background-color: rgba(0,0,0,0.6); backdrop-filter: blur(4px); align-items: center; justify-content: center; }
.modal.active { display: flex; align-items: center; justify-content: center; }
.modal-content { background: var(--gradient-card); margin: 0 auto; padding: var(--spacing-6); border-radius: var(--radius-xl); width: 90%; max-width: 500px; box-shadow: var(--shadow-lg); border: 1px solid var(--secondary-200); position: relative; max-height: 90vh; display: flex; flex-direction: column; overflow: auto; }
.modal-content > h2 { position: sticky; top: 0; background: var(--gradient-card); margin-top: 0; padding-bottom: var(--spacing-3); margin-bottom: var(--spacing-4); border-bottom: 1px solid var(--secondary-200); z-index: 1; }
.modal-header { position: sticky; top: 0; background: var(--gradient-card); z-index: 1; }
.modal-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: var(--spacing-4); padding-bottom: var(--spacing-3); border-bottom: 1px solid var(--secondary-200); }
.modal-title { font-size: var(--font-size-xl); font-weight: 700; color: var(--secondary-800); }
.modal-close { background: none; border: none; font-size: var(--font-size-2xl); color: var(--secondary-500); cursor: pointer; width: 32px; height: 32px; display: flex; align-items: center; justify-content: center; border-radius: var(--radius-md); }
.modal-close:hover { color: var(--secondary-800); background: var(--secondary-100); }

.hidden { display: none !important; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
.focus-visible { outline: 2px solid var(--primary-500); outline-offset: 2px; }

@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes slideDown { from { transform: translateY(-50px); opacity: 0; } to { transform: translateY(0); opacity: 1; } }
/* Additional Design Tokens */
:root {
  /* Extended Color Palette */
  --success-50: #ecfdf5;
  --success-100: #d1fae5;
  --success-200: #a7f3d0;
  --success-300: #6ee7b7;
  --success-400: #34d399;
  --success-600: #059669;
  --success-700: #047857;
  --success-800: #065f46;
  --success-900: #064e3b;
  
  --warning-50: #fffbeb;
  --warning-100: #fef3c7;
  --warning-200: #fde68a;
  --warning-300: #fcd34d;
  --warning-400: #fbbf24;
  --warning-600: #d97706;
  --warning-700: #b45309;
  --warning-800: #92400e;
  --warning-900: #78350f;
  
  --error-50: #fef2f2;
  --error-100: #fee2e2;
  --error-200: #fecaca;
  --error-300: #fca5a5;
  --error-400: #f87171;
  --error-600: #dc2626;
  --error-700: #b91c1c;
  --error-800: #991b1b;
  --error-900: #7f1d1d;
  
  --info-50: #eff6ff;
  --info-100: #dbeafe;
  --info-200: #bfdbfe;
  --info-300: #93c5fd;
  --info-400: #60a5fa;
  --info-600: #2563eb;
  --info-700: #1d4ed8;
  --info-800: #1e40af;
  --info-900: #1e3a8a;
  
  /* Extended Typography */
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  --font-size-5xl: 3rem;
  
  /* Extended Spacing */
  --spacing-10: 2.5rem;
  --spacing-12: 3rem;
  --spacing-16: 4rem;
  --spacing-20: 5rem;
  
  /* Extended Shadows */
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
  --shadow-2xl: 0 25px 50px -12px rgb(0 0 0 / 0.25);
  
  /* Extended Border Radius */
  --radius-2xl: 1.5rem;
  
  /* Extended Transitions */
  --transition-slow: 0.5s ease-in-out;
  
  /* Additional Gradients */
  --gradient-accent: linear-gradient(135deg, var(--success-500), var(--info-500));
  --gradient-hero: linear-gradient(135deg, rgba(2, 132, 199, 0.9), rgba(8, 47, 73, 0.9));
  --gradient-sidebar: linear-gradient(180deg, var(--primary-800), var(--primary-900));
}

/* Global Styles */
* { -webkit-user-select: none; -ms-user-select: none; user-select: none; }
input, textarea { -webkit-user-select: text; -ms-user-select: text; user-select: text; }

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  -ms-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-family);
  color: var(--secondary-800);
  background: linear-gradient(135deg, var(--secondary-50) 0%, var(--secondary-100) 100%);
  line-height: 1.6;
  overflow-x: hidden;
  font-size: var(--font-size-base);
}

/* Enhanced Button Variants */
.btn-success { background: var(--success-500); color: #fff; box-shadow: var(--shadow-md); }
.btn-success:hover { transform: translateY(-2px); box-shadow: var(--shadow-lg); background: var(--success-600); }
.btn-warning { background: var(--warning-500); color: #fff; box-shadow: var(--shadow-md); }
.btn-warning:hover { transform: translateY(-2px); box-shadow: var(--shadow-lg); background: var(--warning-600); }
.btn-error { background: var(--error-500); color: #fff; box-shadow: var(--shadow-md); }
.btn-error:hover { transform: translateY(-2px); box-shadow: var(--shadow-lg); background: var(--error-600); }
.btn-info { background: var(--info-500); color: #fff; box-shadow: var(--shadow-md); }
.btn-info:hover { transform: translateY(-2px); box-shadow: var(--shadow-lg); background: var(--info-600); }

.btn-sm { padding: var(--spacing-2) var(--spacing-3); font-size: var(--font-size-sm); border-radius: var(--radius-md); min-height: 36px; }

/* Card Components */
.card {
  background: var(--gradient-card);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--secondary-200);
  overflow: hidden;
  transition: all var(--transition-normal);
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.card-header {
  padding: var(--spacing-5) var(--spacing-6) var(--spacing-3);
  border-bottom: 1px solid var(--secondary-200);
  background: rgba(255, 255, 255, 0.5);
}

.card-body {
  padding: var(--spacing-6);
}

.card-footer {
  padding: var(--spacing-4) var(--spacing-6);
  border-top: 1px solid var(--secondary-200);
  background: rgba(255, 255, 255, 0.3);
}

/* Alert Components */
.alert {
  padding: var(--spacing-4);
  border-radius: var(--radius-lg);
  border: 1px solid transparent;
  margin-bottom: var(--spacing-4);
}

.alert-success {
  background-color: var(--success-50);
  border-color: var(--success-200);
  color: var(--success-800);
}

.alert-warning {
  background-color: var(--warning-50);
  border-color: var(--warning-200);
  color: var(--warning-800);
}

.alert-error {
  background-color: var(--error-50);
  border-color: var(--error-200);
  color: var(--error-800);
}

.alert-info {
  background-color: var(--info-50);
  border-color: var(--info-200);
  color: var(--info-800);
}

/* Badge Components */
.badge {
  display: inline-flex;
  align-items: center;
  padding: var(--spacing-1) var(--spacing-2);
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.badge-success {
  background-color: var(--success-500);
  color: white;
}

.badge-warning {
  background-color: var(--warning-500);
  color: white;
}

.badge-error {
  background-color: var(--error-500);
  color: white;
}

.badge-info {
  background-color: var(--info-500);
  color: white;
}

/* Utility Classes */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mb-1 { margin-bottom: var(--spacing-1); }
.mb-2 { margin-bottom: var(--spacing-2); }
.mb-3 { margin-bottom: var(--spacing-3); }
.mb-4 { margin-bottom: var(--spacing-4); }
.mb-5 { margin-bottom: var(--spacing-5); }

.mt-1 { margin-top: var(--spacing-1); }
.mt-2 { margin-top: var(--spacing-2); }
.mt-3 { margin-top: var(--spacing-3); }
.mt-4 { margin-top: var(--spacing-4); }
.mt-5 { margin-top: var(--spacing-5); }

.p-1 { padding: var(--spacing-1); }
.p-2 { padding: var(--spacing-2); }
.p-3 { padding: var(--spacing-3); }
.p-4 { padding: var(--spacing-4); }
.p-5 { padding: var(--spacing-5); }

/* Accessibility */
.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--primary-600);
  color: white;
  padding: 8px;
  text-decoration: none;
  border-radius: 0 0 var(--radius-sm) 0;
  z-index: 100;
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: 0;
}

/* Focus styles for accessibility */
*:focus {
  outline: 2px solid var(--primary-500);
  outline-offset: 2px;
}

/* Responsive Design */
@media (max-width: 768px) {
  .modal-content {
    width: 95%;
    margin: 10% auto;
    padding: var(--spacing-4);
  }
  
  .btn {
    min-height: 40px;
    padding: var(--spacing-2) var(--spacing-4);
  }
  
  .btn-lg {
    padding: var(--spacing-3) var(--spacing-5);
  }
}

/* Animation Utilities */
.fade-in {
  animation: fadeIn var(--transition-normal);
}

.slide-down {
  animation: slideDown var(--transition-normal);
}

/* Loading States */
.loading {
  position: relative;
  pointer-events: none;
}

.loading::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 20px;
  height: 20px;
  margin: -10px 0 0 -10px;
  border: 2px solid var(--secondary-200);
  border-top: 2px solid var(--primary-500);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

/* Alert Modal Styles */
.alert-modal { 
  display: none; 
  position: fixed; 
  z-index: 10000; 
  left: 0; 
  top: 0; 
  width: 100%; 
  height: 100%; 
  background-color: rgba(0, 0, 0, 0.5); 
  animation: fadeIn 0.3s; 
}

.alert-modal-content { 
  background-color: #fff; 
  margin: 15% auto; 
  padding: 0; 
  border-radius: var(--radius-md); 
  width: 90%; 
  max-width: 500px; 
  box-shadow: var(--shadow-xl); 
  animation: slideDown 0.3s; 
}

.alert-modal-header { 
  padding: var(--spacing-5); 
  border-bottom: 1px solid var(--secondary-200); 
  display: flex; 
  align-items: center; 
  gap: var(--spacing-4); 
}

.alert-modal-icon { 
  font-size: var(--font-size-2xl); 
  width: 40px; 
  height: 40px; 
  border-radius: 50%; 
  display: flex; 
  align-items: center; 
  justify-content: center; 
}

.alert-modal-icon.success { 
  background-color: var(--success-100); 
  color: var(--success-600); 
}

.alert-modal-icon.error { 
  background-color: var(--error-100); 
  color: var(--error-600); 
}

.alert-modal-icon.warning { 
  background-color: var(--warning-100); 
  color: var(--warning-600); 
}

.alert-modal-icon.info { 
  background-color: var(--info-100); 
  color: var(--info-600); 
}

.alert-modal-title { 
  margin: 0; 
  font-size: var(--font-size-lg); 
  font-weight: 600; 
  color: var(--secondary-800); 
}

.alert-modal-body { 
  padding: var(--spacing-5); 
}

.alert-modal-footer { 
  padding: var(--spacing-4) var(--spacing-5); 
  border-top: 1px solid var(--secondary-200); 
  display: flex; 
  justify-content: flex-end; 
  gap: var(--spacing-3); 
}

.alert-modal-btn { 
  padding: var(--spacing-2) var(--spacing-4); 
  border: none; 
  border-radius: var(--radius-sm); 
  font-size: var(--font-size-sm); 
  cursor: pointer; 
  transition: all var(--transition-normal); 
  font-weight: 500; 
}

.alert-modal-btn-primary { 
  background-color: var(--primary-500); 
  color: white; 
}

.alert-modal-btn-primary:hover { 
  background-color: var(--primary-600); 
}

.alert-modal-btn-secondary { 
  background-color: var(--secondary-500); 
  color: white; 
}

.alert-modal-btn-secondary:hover { 
  background-color: var(--secondary-600); 
}

.alert-modal-btn-danger { 
  background-color: var(--error-500); 
  color: white; 
}

.alert-modal-btn-danger:hover { 
  background-color: var(--error-600); 
}