/* ========================================
   WalidSmart.com - Design System
   Modern, Premium Arabic Website
   ======================================== */

/* Font Display Optimization */
@font-face {
  font-family: 'Cairo';
  font-display: swap;
  src: local('Cairo');
}

@font-face {
  font-family: 'Inter';
  font-display: swap;
  src: local('Inter');
}

/* ========================================
   CSS Variables - Design Tokens
   ======================================== */
:root {
  /* Colors - Primary Palette */
  --color-primary: #2563eb;
  --color-primary-light: #3b82f6;
  --color-primary-dark: #1e40af;
  --color-secondary: #10b981;
  --color-secondary-light: #34d399;
  --color-secondary-dark: #059669;
  
  /* Gradients */
  --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --gradient-secondary: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
  --gradient-success: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
  --gradient-hero: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);
  
  /* Neutral Colors */
  --color-white: #ffffff;
  --color-light: #f8fafc;
  --color-gray-100: #f1f5f9;
  --color-gray-200: #e2e8f0;
  --color-gray-300: #cbd5e1;
  --color-gray-400: #94a3b8;
  --color-gray-500: #64748b;
  --color-gray-600: #475569;
  --color-gray-700: #334155;
  --color-gray-800: #1e293b;
  --color-gray-900: #0f172a;
  --color-black: #000000;
  
  /* Dark Mode Colors */
  --color-dark-bg: #0f172a;
  --color-dark-surface: #1e293b;
  --color-dark-border: #334155;
  
  /* Semantic Colors */
  --color-success: #10b981;
  --color-warning: #f59e0b;
  --color-error: #ef4444;
  --color-info: #3b82f6;
  
  /* Typography */
  --font-primary: 'Cairo', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  --font-secondary: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-code: 'JetBrains Mono', 'Courier New', monospace;
  
  /* Font Sizes */
  --text-xs: 0.75rem;      /* 12px */
  --text-sm: 0.875rem;     /* 14px */
  --text-base: 1rem;       /* 16px */
  --text-lg: 1.125rem;     /* 18px */
  --text-xl: 1.25rem;      /* 20px */
  --text-2xl: 1.5rem;      /* 24px */
  --text-3xl: 1.875rem;    /* 30px */
  --text-4xl: 2.25rem;     /* 36px */
  --text-5xl: 3rem;        /* 48px */
  --text-6xl: 3.75rem;     /* 60px */
  
  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  
  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --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);
  --shadow-glow: 0 0 20px rgba(102, 126, 234, 0.5);
  
  /* Transitions */
  --transition-fast: 150ms ease-in-out;
  --transition-base: 300ms ease-in-out;
  --transition-slow: 500ms ease-in-out;
  
  /* Z-index */
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal-backdrop: 1040;
  --z-modal: 1050;
  --z-popover: 1060;
  --z-tooltip: 1070;
}

/* Dark Mode Variables */
[data-theme="dark"] {
  --color-light: #0f172a;
  --color-gray-100: #1e293b;
  --color-gray-200: #334155;
  --color-gray-300: #475569;
  --color-white: #f8fafc;
}

/* ========================================
   Reset & Base Styles
   ======================================== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  direction: rtl;
}

body {
  font-family: var(--font-primary);
  font-size: var(--text-base);
  line-height: 1.7;
  color: var(--color-gray-800);
  background-color: var(--color-light);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color var(--transition-base), color var(--transition-base);
}

[data-theme="dark"] body {
  color: var(--color-gray-100);
  background-color: var(--color-dark-bg);
}

/* ========================================
   Typography
   ======================================== */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--space-4);
  color: var(--color-gray-900);
}

[data-theme="dark"] h1,
[data-theme="dark"] h2,
[data-theme="dark"] h3,
[data-theme="dark"] h4,
[data-theme="dark"] h5,
[data-theme="dark"] h6 {
  color: var(--color-white);
}

h1 { font-size: var(--text-5xl); }
h2 { font-size: var(--text-4xl); }
h3 { font-size: var(--text-3xl); }
h4 { font-size: var(--text-2xl); }
h5 { font-size: var(--text-xl); }
h6 { font-size: var(--text-lg); }

p {
  margin-bottom: var(--space-4);
  color: var(--color-gray-600);
}

[data-theme="dark"] p {
  color: var(--color-gray-300);
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-primary-dark);
}

/* ========================================
   Layout Utilities
   ======================================== */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.container-fluid {
  width: 100%;
  padding: 0 var(--space-6);
}

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

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

/* Grid System */
.grid {
  display: grid;
  gap: var(--space-6);
}

.grid-2 {
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-3 {
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.grid-4 {
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

/* Flex Utilities */
.flex {
  display: flex;
}

.flex-center {
  display: flex;
  align-items: center;
  justify-content: center;
}

.flex-between {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

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

.gap-2 { gap: var(--space-2); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }
.gap-8 { gap: var(--space-8); }

/* ========================================
   Components - Header & Navigation
   ======================================== */
.header {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  transition: all var(--transition-base);
}

[data-theme="dark"] .header {
  background: rgba(15, 23, 42, 0.95);
}

.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) 0;
}

.logo {
  font-size: var(--text-2xl);
  font-weight: 800;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: var(--space-8);
  align-items: center;
}

.nav-link {
  color: var(--color-gray-700);
  font-weight: 500;
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  position: relative;
}

[data-theme="dark"] .nav-link {
  color: var(--color-gray-300);
}

.related-articles {
  margin-top: var(--space-16);
  padding: var(--space-8);
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.05), rgba(16, 185, 129, 0.05));
  border-radius: var(--radius-2xl);
  border: 1px solid rgba(37, 99, 235, 0.15);
  box-shadow: var(--shadow-md);
}

[data-theme="dark"] .related-articles {
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.1), rgba(16, 185, 129, 0.1));
  border-color: rgba(16, 185, 129, 0.2);
}

.related-articles h2 {
  margin-bottom: var(--space-6);
  font-size: var(--text-2xl);
  font-weight: 700;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-6);
  width: 100%;
  max-width: 100%;
  align-items: stretch;
  justify-items: stretch;
}

@media (max-width: 900px) {
  .related-grid {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }
}

.related-card {
  background: var(--color-white);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.07);
  border: 1px solid rgba(0,0,0,0.08);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  display: flex;
  flex-direction: column;
  height: 100%;
  position: relative;
  text-align: right;
}

.related-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient-primary);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s ease;
}

.related-card:hover::before {
  transform: scaleX(1);
}

[data-theme="dark"] .related-card {
  background: var(--color-dark-surface);
  border-color: var(--color-dark-border);
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
}

.related-card-image {
  width: 100%;
  height: 180px;
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.related-card-image::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.8), rgba(16, 185, 129, 0.8));
  opacity: 0.9;
}

.related-card-image i {
  font-size: 3.5rem;
  color: white;
  position: relative;
  z-index: 1;
  filter: drop-shadow(0 2px 8px rgba(0, 0, 0, 0.2));
}

.related-card-content {
  padding: var(--space-5);
  flex: 1;
  display: flex;
  flex-direction: column;
}

[data-theme="dark"] .related-card h4 {
  color: var(--color-white) !important;
}

.related-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 12px 24px rgba(37, 99, 235, 0.15);
}

[data-theme="dark"] .related-card:hover {
  box-shadow: 0 12px 24px rgba(16, 185, 129, 0.2);
}

.related-card h4 {
  margin-bottom: var(--space-3);
  font-size: var(--text-lg);
  font-weight: 600;
  line-height: 1.5;
  color: var(--color-gray-900);
}

.related-card .card-link {
  margin-top: auto;
  color: var(--color-primary);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  transition: gap 0.3s ease;
}

.related-card:hover .card-link {
  gap: var(--space-3);
}

.related-card .card-link i {
  transition: transform 0.3s ease;
}

.related-card:hover .card-link i {
  transform: translateX(-4px);
}

.nav-link:hover {
  color: var(--color-primary);
  background: var(--color-gray-100);
}

[data-theme="dark"] .nav-link:hover {
  background: var(--color-dark-surface);
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  right: 50%;
  transform: translateX(50%);
  width: 24px;
  height: 3px;
  background: var(--gradient-primary);
  border-radius: var(--radius-full);
}

/* Mobile Menu Button */
.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  font-size: var(--text-2xl);
  cursor: pointer;
  color: var(--color-gray-700);
}

[data-theme="dark"] .mobile-menu-btn {
  color: var(--color-gray-300);
}

/* Theme Toggle */
.theme-toggle {
  background: var(--color-gray-100);
  border: none;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-xl);
  transition: all var(--transition-base);
}

[data-theme="dark"] .theme-toggle {
  background: var(--color-dark-surface);
}

.theme-toggle:hover {
  transform: scale(1.1) rotate(15deg);
}

/* ========================================
   Components - Hero Section
   ======================================== */
.hero {
  background: var(--gradient-hero);
  color: var(--color-white);
  padding: var(--space-24) 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><circle cx="50" cy="50" r="2" fill="white" opacity="0.1"/></svg>');
  opacity: 0.3;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 800px;
  margin: 0 auto;
}

.hero h1 {
  color: var(--color-white);
  font-size: var(--text-6xl);
  margin-bottom: var(--space-6);
  animation: fadeInUp 0.8s ease-out;
}

.hero p {
  color: rgba(255, 255, 255, 0.9);
  font-size: var(--text-xl);
  margin-bottom: var(--space-8);
  animation: fadeInUp 0.8s ease-out 0.2s backwards;
}

.hero-buttons {
  display: flex;
  gap: var(--space-4);
  justify-content: center;
  animation: fadeInUp 0.8s ease-out 0.4s backwards;
}

/* ========================================
   Components - Buttons
   ======================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-size: var(--text-base);
  font-weight: 600;
  border-radius: var(--radius-lg);
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition-base);
  text-decoration: none;
  font-family: var(--font-primary);
}

.btn-primary {
  background: var(--color-primary);
  color: var(--color-white);
  box-shadow: var(--shadow-md);
}

.btn-primary:hover {
  background: var(--color-primary-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-xl);
}

.btn-secondary {
  background: transparent;
  color: var(--color-white);
  border-color: var(--color-white);
}

.btn-secondary:hover {
  background: var(--color-white);
  color: var(--color-primary);
}

.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.btn-outline:hover {
  background: var(--color-primary);
  color: var(--color-white);
}

.btn-lg {
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-lg);
}

/* ========================================
   Components - Cards
   ======================================== */
.card {
  background: var(--color-white);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
  height: 100%;
}

[data-theme="dark"] .card {
  background: var(--color-dark-surface);
}

.card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-2xl);
}

.card-glass {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.card-img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-4);
}

.card-icon {
  width: 60px;
  height: 60px;
  background: var(--gradient-primary);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-3xl);
  color: var(--color-white);
  margin-bottom: var(--space-4);
}

.card-title {
  font-size: var(--text-xl);
  margin-bottom: var(--space-3);
}

.card-text {
  color: var(--color-gray-600);
  margin-bottom: var(--space-4);
}

[data-theme="dark"] .card-text {
  color: var(--color-gray-400);
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-primary);
  font-weight: 600;
  transition: gap var(--transition-fast);
}

.card-link:hover {
  gap: var(--space-3);
}

/* ========================================
   Components - Badge
   ======================================== */
.badge {
  display: inline-block;
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-sm);
  font-weight: 600;
  border-radius: var(--radius-full);
  background: var(--color-primary);
  color: var(--color-white);
}

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

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

.badge-outline {
  background: transparent;
  border: 2px solid var(--color-primary);
  color: var(--color-primary);
}

/* ========================================
   Components - Forms
   ======================================== */
.form-group {
  margin-bottom: var(--space-6);
}

.form-label {
  display: block;
  margin-bottom: var(--space-2);
  font-weight: 600;
  color: var(--color-gray-700);
}

[data-theme="dark"] .form-label {
  color: var(--color-gray-300);
}

.form-control {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-base);
  font-family: var(--font-primary);
  border: 2px solid var(--color-gray-200);
  border-radius: var(--radius-lg);
  background: var(--color-white);
  color: var(--color-gray-800);
  transition: all var(--transition-base);
}

[data-theme="dark"] .form-control {
  background: var(--color-dark-surface);
  border-color: var(--color-dark-border);
  color: var(--color-white);
}

.form-control:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

textarea.form-control {
  resize: vertical;
  min-height: 120px;
}

/* ========================================
   Components - Footer
   ======================================== */
.footer {
  background: linear-gradient(135deg, #334155 0%, #1e293b 100%);
  color: var(--color-gray-300);
  padding: var(--space-16) 0 var(--space-8);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-8);
  margin-bottom: var(--space-8);
}

.footer-section h3 {
  color: var(--color-white);
  margin-bottom: var(--space-4);
}

.footer-section p {
  color: var(--color-white);
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: var(--space-2);
}

.footer-links a {
  color: var(--color-gray-300);
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: #ff8c42;
}

.footer-bottom {
  text-align: center;
  padding-top: var(--space-8);
  border-top: 1px solid var(--color-gray-600);
  color: var(--color-white);
}

.footer-bottom p {
  color: #ffffff !important;
}

.social-links {
  display: flex;
  gap: var(--space-4);
  justify-content: center;
  margin-bottom: var(--space-4);
}

.social-link {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  background: var(--color-gray-600);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-white);
  transition: all var(--transition-base);
}

.social-link:hover {
  background: #ff8c42;
  color: var(--color-white);
  transform: translateY(-4px);
}

/* ========================================
   Animations
   ======================================== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(-30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

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

.animate-fadeInUp {
  animation: fadeInUp 0.6s ease-out;
}

.animate-fadeIn {
  animation: fadeIn 0.6s ease-out;
}

/* ========================================
   Responsive Design
   ======================================== */
@media (max-width: 768px) {
  html {
    font-size: 14px;
  }
  
  .nav-menu {
    position: fixed;
    top: 70px;
    right: -100%;
    width: 100%;
    max-width: 300px;
    height: calc(100vh - 70px);
    background: var(--color-white);
    flex-direction: column;
    padding: var(--space-6);
    box-shadow: var(--shadow-xl);
    transition: right var(--transition-base);
    z-index: var(--z-dropdown);
  }
  
  [data-theme="dark"] .nav-menu {
    background: var(--color-dark-surface);
  }
  
  .nav-menu.active {
    right: 0;
  }
  
  .mobile-menu-btn {
    display: block;
  }
  
  .hero h1 {
    font-size: var(--text-4xl);
  }
  
  .hero p {
    font-size: var(--text-lg);
  }
  
  .hero-buttons {
    flex-direction: column;
  }
  
  .grid-2, .grid-3, .grid-4 {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 var(--space-4);
  }
  
  .section {
    padding: var(--space-12) 0;
  }
}