/* ==================== VARIABLES ==================== */
:root {
  /* Primary Colors - Blue */
  --primary-50: #eff6ff;
  --primary-100: #dbeafe;
  --primary-200: #bfdbfe;
  --primary-300: #93c5fd;
  --primary-400: #60a5fa;
  --primary-500: #3b82f6;
  --primary-600: #2563eb;
  --primary-700: #1d4ed8;
  --primary-800: #1e40af;
  --primary-900: #1e3a8a;

  /* Neutral Colors - Gray */
  --neutral-50: #f8fafc;
  --neutral-100: #f1f5f9;
  --neutral-200: #e2e8f0;
  --neutral-300: #cbd5e1;
  --neutral-400: #94a3b8;
  --neutral-500: #64748b;
  --neutral-600: #475569;
  --neutral-700: #334155;
  --neutral-800: #1e293b;
  --neutral-900: #0f172a;

  /* Accent Colors */
  --accent-emerald: #10b981;
  --accent-amber: #f59e0b;
  --accent-rose: #f43f5e;
  --accent-indigo: #6366f1;
  --accent-purple: #8b5cf6;

  /* Semantic Colors */
  --success: #10b981;
  --warning: #f59e0b;
  --error: #ef4444;
  --info: #3b82f6;

  /* Typography */
  --font-family: 'Tajawal', -apple-system, BlinkMacSystemFont, 'Segoe UI', 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;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;

  /* Spacing */
  --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;
  --spacing-10: 2.5rem;
  --spacing-12: 3rem;
  --spacing-16: 4rem;

  /* Border Radius */
  --radius-sm: 0.25rem;
  --radius: 0.5rem;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;
  --radius-2xl: 2rem;
  --radius-3xl: 3rem;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);

  /* Transitions */
  --transition-fast: 150ms ease-in-out;
  --transition-normal: 300ms ease-in-out;
  --transition-slow: 500ms ease-in-out;
}

/* ==================== BASE STYLES ==================== */
* {
  box-sizing: border-box;
}

body {
  font-family: var(--font-family);
  line-height: 1.6;
  color: var(--neutral-700);
  background-color: var(--neutral-50);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ==================== TYPOGRAPHY ==================== */
h1, h2, h3, h4, h5, h6 {
  font-weight: 800;
  line-height: 1.2;
  color: var(--neutral-900);
  margin-bottom: var(--spacing-4);
}

h1 { font-size: var(--font-size-4xl); }
h2 { font-size: var(--font-size-3xl); }
h3 { font-size: var(--font-size-2xl); }
h4 { font-size: var(--font-size-xl); }
h5 { font-size: var(--font-size-lg); }
h6 { font-size: var(--font-size-base); }

p {
  margin-bottom: var(--spacing-4);
  color: var(--neutral-600);
  font-weight: 400;
}

.text-sm { font-size: var(--font-size-sm); }
.text-base { font-size: var(--font-size-base); }
.text-lg { font-size: var(--font-size-lg); }
.text-xl { font-size: var(--font-size-xl); }

.font-light { font-weight: 300; }
.font-normal { font-weight: 400; }
.font-medium { font-weight: 500; }
.font-semibold { font-weight: 600; }
.font-bold { font-weight: 700; }
.font-black { font-weight: 800; }

/* ==================== BUTTONS ==================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-2);
  padding: var(--spacing-3) var(--spacing-6);
  border-radius: var(--radius-lg);
  font-weight: 600;
  font-size: var(--font-size-base);
  text-decoration: none;
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
  position: relative;
  overflow: hidden;
}

.btn:focus {
  outline: none;
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.3);
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* Primary Button */
.btn-primary {
  background-color: var(--primary-600);
  color: white;
  box-shadow: var(--shadow-md);
}

.btn-primary:hover:not(:disabled) {
  background-color: var(--primary-700);
  transform: translateY(-1px);
  box-shadow: var(--shadow-lg);
}

.btn-primary:active:not(:disabled) {
  transform: translateY(0);
  box-shadow: var(--shadow-md);
}

/* Secondary Button */
.btn-secondary {
  background-color: white;
  color: var(--neutral-700);
  border-color: var(--neutral-200);
  box-shadow: var(--shadow-sm);
}

.btn-secondary:hover:not(:disabled) {
  background-color: var(--neutral-50);
  border-color: var(--primary-300);
  color: var(--primary-600);
  transform: translateY(-1px);
  box-shadow: var(--shadow);
}

/* Success Button */
.btn-success {
  background-color: var(--success);
  color: white;
  box-shadow: var(--shadow-md);
}

.btn-success:hover:not(:disabled) {
  background-color: #0da271;
  transform: translateY(-1px);
  box-shadow: var(--shadow-lg);
}

/* ==================== CARDS ==================== */
.card {
  background: white;
  border-radius: var(--radius-xl);
  border: 1px solid var(--neutral-200);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
  overflow: hidden;
}

.card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--neutral-300);
}

.card-header {
  padding: var(--spacing-6) var(--spacing-6) 0 var(--spacing-6);
  border-bottom: 1px solid var(--neutral-100);
}

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

.card-footer {
  padding: 0 var(--spacing-6) var(--spacing-6) var(--spacing-6);
  border-top: 1px solid var(--neutral-100);
}

/* ==================== FORMS ==================== */
.form-group {
  margin-bottom: var(--spacing-4);
}

.form-label {
  display: block;
  font-weight: 600;
  color: var(--neutral-700);
  margin-bottom: var(--spacing-2);
  font-size: var(--font-size-sm);
}

.form-input {
  width: 100%;
  padding: var(--spacing-3) var(--spacing-4);
  border: 2px solid var(--neutral-200);
  border-radius: var(--radius);
  font-size: var(--font-size-base);
  transition: all var(--transition-fast);
  background-color: white;
}

.form-input:focus {
  outline: none;
  border-color: var(--primary-400);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.form-input::placeholder {
  color: var(--neutral-400);
}

.form-input:disabled {
  background-color: var(--neutral-100);
  color: var(--neutral-500);
  cursor: not-allowed;
}

/* ==================== NAVIGATION ==================== */
.navbar {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
  transition: all var(--transition-normal);
}

.nav-link {
  color: var(--neutral-600);
  text-decoration: none;
  font-weight: 600;
  padding: var(--spacing-2) var(--spacing-3);
  border-radius: var(--radius);
  transition: all var(--transition-fast);
}

.nav-link:hover {
  color: var(--primary-600);
  background-color: var(--primary-50);
}

.nav-link.active {
  color: var(--primary-600);
  background-color: var(--primary-50);
}

/* ==================== LAYOUT & SPACING ==================== */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-4);
}

.section {
  padding: var(--spacing-16) 0;
}

.section-sm {
  padding: var(--spacing-8) 0;
}

.section-lg {
  padding: var(--spacing-20) 0;
}

/* ==================== RESPONSIVE DESIGN ==================== */
/* Viewport Meta Tag Required: <meta name="viewport" content="width=device-width, initial-scale=1.0"> */

/* Large Desktop (1200px+) */
@media (min-width: 1200px) {
  .container { max-width: 1200px; }
}

/* Desktop (1024px - 1199px) */
@media (max-width: 1199px) {
  .container { max-width: 960px; }
}

/* Tablet (768px - 1023px) */
@media (max-width: 1023px) {
  :root {
    --font-size-4xl: 2.25rem;
    --font-size-3xl: 1.875rem;
    --font-size-2xl: 1.5rem;
    --font-size-xl: 1.25rem;
    --font-size-lg: 1.125rem;
  }

  .container {
    padding: 0 var(--spacing-3);
  }

  .section {
    padding: var(--spacing-12) 0;
  }

  .btn {
    padding: var(--spacing-3) var(--spacing-4);
    font-size: var(--font-size-sm);
    min-height: 44px; /* Touch target size */
  }

  .card {
    border-radius: var(--radius-lg);
  }

  .form-input {
    padding: var(--spacing-3);
    font-size: var(--font-size-sm);
    min-height: 44px; /* Touch target size */
  }
  
  /* Improved touch targets for tablet */
  .nav-link {
    padding: var(--spacing-3) var(--spacing-4);
    min-height: 44px;
    display: flex;
    align-items: center;
  }
  
  /* Better spacing for tablet */
  .mb-4 { margin-bottom: var(--spacing-6); }
  .mt-4 { margin-top: var(--spacing-6); }
}

/* Mobile Large (480px - 767px) */
@media (max-width: 767px) {
  :root {
    --font-size-4xl: 2rem;
    --font-size-3xl: 1.75rem;
    --font-size-2xl: 1.5rem;
    --font-size-xl: 1.25rem;
    --font-size-lg: 1.125rem;
    --spacing-16: 3rem;
    --spacing-20: 3.5rem;
  }

  .container {
    padding: 0 var(--spacing-2);
  }

  .section {
    padding: var(--spacing-10) 0;
  }

  .btn {
    padding: var(--spacing-3) var(--spacing-4);
    font-size: var(--font-size-sm);
    min-height: 48px; /* Larger touch targets for mobile */
    border-radius: var(--radius-lg);
    min-width: 44px; /* Minimum touch target */
  }

  .card {
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-4);
  }

  .form-input {
    padding: var(--spacing-3);
    font-size: 16px; /* Prevents zoom on iOS */
    min-height: 48px;
    border-radius: var(--radius-lg);
  }
  
  /* Mobile navigation improvements */
  .nav-link {
    padding: var(--spacing-4);
    min-height: 48px;
    margin-bottom: var(--spacing-1);
  }
  
  /* Better mobile spacing */
  h1, h2, h3 { margin-bottom: var(--spacing-3); }
  .mb-4 { margin-bottom: var(--spacing-5); }
  .mt-4 { margin-top: var(--spacing-5); }
  
  /* Mobile grid adjustments */
  .grid-cols-2 { grid-template-columns: 1fr; }
  .grid-cols-3 { grid-template-columns: 1fr; }
  
  /* Mobile flex adjustments */
  .flex-col-mobile { flex-direction: column; }
  .w-full-mobile { width: 100%; }
}

/* Mobile Small (320px - 479px) */
@media (max-width: 479px) {
  :root {
    --font-size-4xl: 1.75rem;
    --font-size-3xl: 1.5rem;
    --font-size-2xl: 1.375rem;
    --font-size-xl: 1.125rem;
    --font-size-lg: 1rem;
    --spacing-10: 2rem;
    --spacing-12: 2.5rem;
    --spacing-16: 3rem;
  }

  .container {
    padding: 0 var(--spacing-1);
  }

  .section {
    padding: var(--spacing-8) 0;
  }

  .btn {
    padding: var(--spacing-2) var(--spacing-3);
    font-size: var(--font-size-sm);
    min-height: 44px; /* Standard touch target */
    min-width: 44px;
    font-weight: 700; /* Better readability */
  }

  .card {
    border-radius: var(--radius-md);
    padding: var(--spacing-4);
  }

  .form-input {
    padding: var(--spacing-2) var(--spacing-3);
    font-size: 16px; /* Prevents zoom on iOS */
    min-height: 44px;
  }
  
  /* Small mobile optimizations */
  h1 { font-size: var(--font-size-3xl); }
  h2 { font-size: var(--font-size-2xl); }
  
  /* Reduce padding for small screens */
  .card-body { padding: var(--spacing-4); }
  .card-header { padding: var(--spacing-4) var(--spacing-4) 0; }
  .card-footer { padding: 0 var(--spacing-4) var(--spacing-4); }
}

/* ==================== TOUCH OPTIMIZATION ==================== */
@media (hover: none) and (pointer: coarse) {
  /* Better touch feedback for mobile devices */
  .btn {
    transition: background-color var(--transition-fast);
    transform: none !important; /* Remove hover effects that don't work well on touch */
  }
  
  .btn:active {
    background-color: var(--primary-700);
    transform: scale(0.98) !important;
  }
  
  .nav-link {
    transition: background-color var(--transition-fast);
  }
  
  .nav-link:active {
    background-color: var(--primary-100);
  }
  
  /* Larger tap targets for touch devices */
  .clickable {
    min-height: 44px;
    min-width: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
  }
  
  /* Better scrolling for touch */
  body {
    -webkit-overflow-scrolling: touch;
    overscroll-behavior: contain;
  }
}

/* ==================== DARK MODE SUPPORT ==================== */
@media (prefers-color-scheme: dark) {
  :root {
    --neutral-50: #0f172a;
    --neutral-100: #1e293b;
    --neutral-200: #334155;
    --neutral-300: #475569;
    --neutral-400: #64748b;
    --neutral-500: #94a3b8;
    --neutral-600: #cbd5e1;
    --neutral-700: #e2e8f0;
    --neutral-800: #f1f5f9;
    --neutral-900: #f8fafc;
  }
}

/* ==================== HIGH CONTRAST MODE ==================== */
@media (prefers-contrast: high) {
  :root {
    --primary-500: #2563eb;
    --primary-600: #1d4ed8;
    --success: #059669;
    --warning: #d97706;
    --error: #dc2626;
  }
  
  .btn {
    border-width: 3px;
  }
  
  .form-input {
    border-width: 2px;
  }
}

/* ==================== REDUCED MOTION ==================== */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* ==================== UTILITY CLASSES ==================== */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-left { text-align: left; }

.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); }
.mb-6 { margin-bottom: var(--spacing-6); }

.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); }
.mt-6 { margin-top: var(--spacing-6); }

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

.opacity-0 { opacity: 0; }
.opacity-50 { opacity: 0.5; }
.opacity-100 { opacity: 1; }

.hidden { display: none; }
.block { display: block; }
.flex { display: flex; }
.inline-flex { display: inline-flex; }

.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.justify-end { justify-content: flex-end; }

.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.items-end { align-items: flex-end; }

.flex-col { flex-direction: column; }
.flex-row { flex-direction: row; }

.w-full { width: 100%; }
.h-full { height: 100%; }

.rounded { border-radius: var(--radius); }
.rounded-lg { border-radius: var(--radius-lg); }
.rounded-xl { border-radius: var(--radius-xl); }

.shadow-sm { box-shadow: var(--shadow-sm); }
.shadow { box-shadow: var(--shadow); }
.shadow-lg { box-shadow: var(--shadow-lg); }

  /* ==================== ANIMATIONS ==================== */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes slideUp {
  from { 
    opacity: 0; 
    transform: translateY(20px); 
  }
  to { 
    opacity: 1; 
    transform: translateY(0); 
  }
}

@keyframes slideInRight {
  from { 
    opacity: 0; 
    transform: translateX(20px); 
  }
  to { 
    opacity: 1; 
    transform: translateX(0); 
  }
}

.animate-fadeIn { animation: fadeIn 0.5s ease-out; }
.animate-slideUp { animation: slideUp 0.5s ease-out; }
.animate-slideInRight { animation: slideInRight 0.5s ease-out; }

/* ==================== RESPONSIVE UTILITIES ==================== */
.hidden-mobile { display: block; }
.block-mobile { display: none; }

@media (max-width: 767px) {
  .hidden-mobile { display: none; }
  .block-mobile { display: block; }
}

.grid-cols-1 { display: grid; grid-template-columns: repeat(1, 1fr); gap: var(--spacing-4); }
.grid-cols-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--spacing-4); }
.grid-cols-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--spacing-4); }
.grid-cols-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--spacing-4); }

/* Touch-friendly utilities */
.touch-target {
  min-height: 44px;
  min-width: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.safe-area-top {
  padding-top: env(safe-area-inset-top);
}

.safe-area-bottom {
  padding-bottom: env(safe-area-inset-bottom);
}

/* Loading states */
.loading {
  opacity: 0.6;
  pointer-events: none;
}

.skeleton {
  background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
  background-size: 200% 100%;
  animation: loading 1.5s infinite;
}

@keyframes loading {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* Form validation styles */
.form-input.error {
  border-color: var(--error);
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

.form-input.success {
  border-color: var(--success);
  box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.1);
}

.error-message {
  color: var(--error);
  font-size: var(--font-size-xs);
  margin-top: var(--spacing-1);
  font-weight: 600;
}

.success-message {
  color: var(--success);
  font-size: var(--font-size-xs);
  margin-top: var(--spacing-1);
  font-weight: 600;
}

/* ==================== CUSTOM COMPONENTS ==================== */
.glass-effect {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.gradient-text {
  background: linear-gradient(135deg, var(--primary-600), var(--accent-emerald));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-1);
  padding: var(--spacing-1) var(--spacing-2);
  border-radius: var(--radius);
  font-size: var(--font-size-xs);
  font-weight: 600;
}

.status-success {
  background-color: rgba(16, 185, 129, 0.1);
  color: var(--success);
  border: 1px solid rgba(16, 185, 129, 0.2);
}

.status-warning {
  background-color: rgba(245, 158, 11, 0.1);
  color: var(--warning);
  border: 1px solid rgba(245, 158, 11, 0.2);
}

.status-error {
  background-color: rgba(239, 68, 68, 0.1);
  color: var(--error);
  border: 1px solid rgba(239, 68, 68, 0.2);
}