/* ============================================
   PLATEFORME DE GESTION D'EXAMENS - ENSGTS
   Design System & Styles Globaux
   ============================================ */

/* Import Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Poppins:wght@400;500;600;700;800&family=Tajawal:wght@400;500;700;800&display=swap');

/* ============================================
   CSS Variables - Design Tokens
   ============================================ */
:root {
  /* Couleurs Principales */
  --color-primary: #1e3a8a;
  --color-primary-dark: #1e293b;
  --color-primary-light: #3b82f6;
  --color-secondary: #f59e0b;
  --color-secondary-dark: #d97706;
  --color-accent: #3b82f6;

  /* Couleurs de fond */
  --color-bg-main: #f8fafc;
  --color-bg-card: #ffffff;
  --color-bg-hover: #f1f5f9;
  --color-bg-overlay: rgba(0, 0, 0, 0.5);

  /* Couleurs de texte */
  --color-text-primary: #1e293b;
  --color-text-secondary: #64748b;
  --color-text-light: #94a3b8;
  --color-text-white: #ffffff;

  /* Couleurs d'état */
  --color-success: #10b981;
  --color-warning: #f59e0b;
  --color-error: #ef4444;
  --color-info: #3b82f6;

  /* Bordures */
  --color-border: #e2e8f0;
  --color-border-dark: #cbd5e1;

  /* Ombres */
  --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);

  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;

  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 300ms ease;
  --transition-slow: 500ms ease;

  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-heading: 'Poppins', sans-serif;
  --font-arabic: 'Tajawal', sans-serif;
}

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

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

body {
  font-family: var(--font-sans);
  background: var(--color-bg-main);
  color: var(--color-text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

/* Support RTL pour l'arabe */
[dir="rtl"] {
  font-family: var(--font-arabic);
}

/* ============================================
   Typography
   ============================================ */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-primary-dark);
  margin-bottom: var(--spacing-md);
}

h1 {
  font-size: 2.5rem;
}

h2 {
  font-size: 2rem;
}

h3 {
  font-size: 1.75rem;
}

h4 {
  font-size: 1.5rem;
}

h5 {
  font-size: 1.25rem;
}

h6 {
  font-size: 1rem;
}

p {
  margin-bottom: var(--spacing-md);
}

/* ============================================
   Layout Principal
   ============================================ */
.app-container {
  display: flex;
  min-height: 100vh;
}

/* Sidebar Navigation */
.sidebar {
  width: 280px;
  background: linear-gradient(180deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: var(--color-text-white);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow-xl);
  position: fixed;
  height: 100vh;
  overflow-y: auto;
  transition: transform var(--transition-base);
  z-index: 1000;
}

.sidebar-header {
  margin-bottom: var(--spacing-2xl);
  padding-bottom: var(--spacing-lg);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.sidebar-logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-sm);
}

.sidebar-logo-icon {
  width: 48px;
  height: 48px;
  background: var(--color-secondary);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: 800;
}

.sidebar-title {
  font-size: 1.125rem;
  font-weight: 600;
  margin: 0;
  color: var(--color-text-white);
}

.sidebar-subtitle {
  font-size: 0.75rem;
  color: rgba(255, 255, 255, 0.7);
  margin: 0;
  margin-top: var(--spacing-xs);
}

/* Navigation Menu */
.nav-menu {
  list-style: none;
}

.nav-item {
  margin-bottom: var(--spacing-sm);
}

.nav-link {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md) var(--spacing-lg);
  color: rgba(255, 255, 255, 0.8);
  text-decoration: none;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  cursor: pointer;
}

.nav-link:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--color-text-white);
  transform: translateX(4px);
}

.nav-link.active {
  background: rgba(255, 255, 255, 0.15);
  color: var(--color-text-white);
  font-weight: 600;
}

.nav-icon {
  font-size: 1.25rem;
  width: 24px;
  text-align: center;
}

/* Main Content Area */
.main-content {
  flex: 1;
  margin-left: 280px;
  padding: var(--spacing-xl);
  min-height: 100vh;
}

/* Header */
.page-header {
  background: var(--color-bg-card);
  padding: var(--spacing-xl);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  margin-bottom: var(--spacing-xl);
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  color: var(--color-text-white);
}

.page-title {
  font-size: 2rem;
  margin: 0;
  color: var(--color-text-white);
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.page-description {
  margin: var(--spacing-sm) 0 0 0;
  opacity: 0.9;
  font-size: 1rem;
}

/* ============================================
   Components - Cards
   ============================================ */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
}

.card {
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
  border: 1px solid var(--color-border);
  cursor: pointer;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
  border-color: var(--color-primary-light);
}

.card-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
}

.card-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  background: linear-gradient(135deg, var(--color-primary-light), var(--color-primary));
  color: var(--color-text-white);
}

.card-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin: 0;
  color: var(--color-primary-dark);
}

.card-subtitle {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  margin: 0;
}

.card-body {
  margin-bottom: var(--spacing-lg);
}

.card-stat {
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--spacing-xs);
}

.card-label {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ============================================
   Components - Buttons
   ============================================ */
.btn {
  padding: var(--spacing-md) var(--spacing-xl);
  border: none;
  border-radius: var(--radius-md);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  text-decoration: none;
  font-size: 1rem;
  font-family: var(--font-sans);
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  color: var(--color-text-white);
  box-shadow: var(--shadow-md);
}

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

.btn-secondary {
  background: var(--color-bg-hover);
  color: var(--color-text-primary);
  border: 1px solid var(--color-border);
}

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

.btn-success {
  background: var(--color-success);
  color: var(--color-text-white);
}

.btn-icon {
  padding: var(--spacing-md);
  width: 44px;
  height: 44px;
  justify-content: center;
}

.btn-sm {
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: 0.875rem;
}

.btn-lg {
  padding: var(--spacing-lg) var(--spacing-2xl);
  font-size: 1.125rem;
}

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

.form-label {
  display: block;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  color: var(--color-text-primary);
}

.form-input,
.form-select {
  width: 100%;
  padding: var(--spacing-md);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-family: var(--font-sans);
  transition: all var(--transition-fast);
  background: var(--color-bg-card);
}

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

.search-box {
  position: relative;
  margin-bottom: var(--spacing-xl);
}

.search-input {
  width: 100%;
  padding: var(--spacing-lg) var(--spacing-xl) var(--spacing-lg) 3.5rem;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-lg);
  font-size: 1.125rem;
  transition: all var(--transition-fast);
  background: var(--color-bg-card);
}

.search-input:focus {
  outline: none;
  border-color: var(--color-primary-light);
  box-shadow: var(--shadow-lg);
}

.search-icon {
  position: absolute;
  left: var(--spacing-lg);
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.5rem;
  color: var(--color-text-secondary);
}

/* ============================================
   Components - Tables
   ============================================ */
.table-container {
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  margin-bottom: var(--spacing-xl);
}

.table-header {
  padding: var(--spacing-xl);
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  color: var(--color-text-white);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.table-title {
  font-size: 1.5rem;
  margin: 0;
  font-weight: 700;
}

.table-actions {
  display: flex;
  gap: var(--spacing-md);
}

.table-wrapper {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
}

thead {
  background: var(--color-bg-hover);
}

th {
  padding: var(--spacing-lg);
  text-align: left;
  font-weight: 600;
  color: var(--color-primary-dark);
  border-bottom: 2px solid var(--color-border);
  white-space: nowrap;
}

td {
  padding: var(--spacing-lg);
  border-bottom: 1px solid var(--color-border);
}

tbody tr {
  transition: background var(--transition-fast);
}

tbody tr:hover {
  background: var(--color-bg-hover);
}

/* Table spéciale pour émargement */
.signature-table td.signature-cell {
  min-width: 150px;
  border-left: 1px solid var(--color-border);
}

/* ============================================
   Components - Upload Area
   ============================================ */
.upload-area {
  background: var(--color-bg-card);
  border: 3px dashed var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-2xl);
  text-align: center;
  cursor: pointer;
  transition: all var(--transition-base);
  margin-bottom: var(--spacing-xl);
}

.upload-area:hover {
  border-color: var(--color-primary-light);
  background: var(--color-bg-hover);
}

.upload-area.dragover {
  border-color: var(--color-primary);
  background: rgba(59, 130, 246, 0.05);
}

.upload-icon {
  font-size: 4rem;
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-md);
}

.upload-text {
  font-size: 1.125rem;
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-sm);
}

.upload-hint {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
}

/* ============================================
   Components - Alerts
   ============================================ */
.alert {
  padding: var(--spacing-lg);
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-lg);
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.alert-success {
  background: #d1fae5;
  color: #065f46;
  border: 1px solid #10b981;
}

.alert-error {
  background: #fee2e2;
  color: #991b1b;
  border: 1px solid #ef4444;
}

.alert-info {
  background: #dbeafe;
  color: #1e40af;
  border: 1px solid #3b82f6;
}

/* ============================================
   Components - Stats
   ============================================ */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
}

.stat-card {
  background: var(--color-bg-card);
  padding: var(--spacing-xl);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  border-left: 4px solid var(--color-primary);
}

.stat-label {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--spacing-sm);
}

.stat-value {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--color-primary);
}

/* ============================================
   Utility Classes
   ============================================ */
.hidden {
  display: none !important;
}

.text-center {
  text-align: center;
}

.text-right {
  text-align: right;
}

.mb-0 {
  margin-bottom: 0;
}

.mb-1 {
  margin-bottom: var(--spacing-sm);
}

.mb-2 {
  margin-bottom: var(--spacing-md);
}

.mb-3 {
  margin-bottom: var(--spacing-lg);
}

.mb-4 {
  margin-bottom: var(--spacing-xl);
}

.mt-0 {
  margin-top: 0;
}

.mt-1 {
  margin-top: var(--spacing-sm);
}

.mt-2 {
  margin-top: var(--spacing-md);
}

.mt-3 {
  margin-top: var(--spacing-lg);
}

.mt-4 {
  margin-top: var(--spacing-xl);
}

/* ============================================
   Responsive Design - Mobile
   ============================================ */
@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
    width: 280px;
  }

  .sidebar.open {
    transform: translateX(0);
  }

  .main-content {
    margin-left: 0;
    padding: var(--spacing-md);
  }

  .mobile-menu-btn {
    position: fixed;
    top: var(--spacing-md);
    left: var(--spacing-md);
    z-index: 999;
    width: 48px;
    height: 48px;
    background: var(--color-primary);
    color: var(--color-text-white);
    border: none;
    border-radius: var(--radius-md);
    font-size: 1.5rem;
    cursor: pointer;
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    justify-content: center;
  }

  .page-header {
    padding: var(--spacing-lg);
    margin-top: 60px;
  }

  .page-title {
    font-size: 1.5rem;
  }

  .cards-grid {
    grid-template-columns: 1fr;
  }

  .table-wrapper {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }

  h1 {
    font-size: 1.75rem;
  }

  background: rgba(59, 130, 246, 0.05);
}

.upload-icon {
  font-size: 4rem;
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-md);
}

.upload-text {
  font-size: 1.125rem;
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-sm);
}

.upload-hint {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
}

/* ============================================
   Components - Alerts
   ============================================ */
.alert {
  padding: var(--spacing-lg);
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-lg);
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.alert-success {
  background: #d1fae5;
  color: #065f46;
  border: 1px solid #10b981;
}

.alert-error {
  background: #fee2e2;
  color: #991b1b;
  border: 1px solid #ef4444;
}

.alert-info {
  background: #dbeafe;
  color: #1e40af;
  border: 1px solid #3b82f6;
}

/* ============================================
   Components - Stats
   ============================================ */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
}

.stat-card {
  background: var(--color-bg-card);
  padding: var(--spacing-xl);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  border-left: 4px solid var(--color-primary);
}

.stat-label {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--spacing-sm);
}

.stat-value {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--color-primary);
}

/* ============================================
   Utility Classes
   ============================================ */
.hidden {
  display: none !important;
}

.text-center {
  text-align: center;
}

.text-right {
  text-align: right;
}

.mb-0 {
  margin-bottom: 0;
}

.mb-1 {
  margin-bottom: var(--spacing-sm);
}

.mb-2 {
  margin-bottom: var(--spacing-md);
}

.mb-3 {
  margin-bottom: var(--spacing-lg);
}

.mb-4 {
  margin-bottom: var(--spacing-xl);
}

.mt-0 {
  margin-top: 0;
}

.mt-1 {
  margin-top: var(--spacing-sm);
}

.mt-2 {
  margin-top: var(--spacing-md);
}

.mt-3 {
  margin-top: var(--spacing-lg);
}

.mt-4 {
  margin-top: var(--spacing-xl);
}

/* ============================================
   Responsive Design - Mobile
   ============================================ */
@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
    width: 280px;
  }

  .sidebar.open {
    transform: translateX(0);
  }

  .main-content {
    margin-left: 0;
    padding: var(--spacing-md);
  }

  .mobile-menu-btn {
    position: fixed;
    top: var(--spacing-md);
    left: var(--spacing-md);
    z-index: 999;
    width: 48px;
    height: 48px;
    background: var(--color-primary);
    color: var(--color-text-white);
    border: none;
    border-radius: var(--radius-md);
    font-size: 1.5rem;
    cursor: pointer;
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    justify-content: center;
  }

  .page-header {
    padding: var(--spacing-lg);
    margin-top: 60px;
  }

  .page-title {
    font-size: 1.5rem;
  }

  .cards-grid {
    grid-template-columns: 1fr;
  }

  .table-wrapper {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }

  h1 {
    font-size: 1.75rem;
  }

  h2 {
    font-size: 1.5rem;
  }

  h3 {
    font-size: 1.25rem;
  }
}

/* ============================================
   Print Styles
   ============================================ */
@media print {

  /* Cacher les éléments non nécessaires */
  .sidebar,
  .mobile-menu-btn,
  .btn,
  .search-box,
  .table-actions,
  .page-description {
    display: none !important;
  }

  /* Réinitialiser les marges */
  .main-content {
    margin-left: 0;
    padding: 0;
  }

  body {
    background: white;
  }

  /* En-tête de page pour l'impression */
  .page-header {
    background: white !important;
    color: black !important;
    border: none !important;
    box-shadow: none !important;
    padding: 20px 0 !important;
    margin-bottom: 20px !important;
    page-break-after: avoid;
  }

  .page-title {
    color: black !important;
    font-size: 24px !important;
    font-weight: 700 !important;
    text-align: center;
    margin: 0 0 10px 0 !important;
    border-bottom: 3px solid black;
    padding-bottom: 10px;
  }

  /* Afficher le grade lors de l'impression */
  .print-only-grade {
    display: block !important;
    color: black !important;
  }

  /* Container de table */
  .table-container {
    box-shadow: none !important;
    page-break-inside: avoid;
    border: none !important;
    margin-top: 0 !important;
  }

  /* En-tête du tableau */
  .table-header {
    background: white !important;
    color: black !important;
    padding: 15px 0 !important;
    border-bottom: 2px solid black !important;
    page-break-after: avoid;
  }

  .table-title {
    color: black !important;
    font-size: 18px !important;
    text-align: center;
  }

  /* Tableau */
  .table-wrapper {
    overflow: visible !important;
  }

  table {
    page-break-inside: auto;
    width: 100%;
    border-collapse: collapse;
  }

  thead {
    display: table-header-group;
    background: #f0f0f0 !important;
  }

  tr {
    page-break-inside: avoid;
    page-break-after: auto;
  }

  th {
    padding: 12px 8px !important;
    border: 2px solid #000 !important;
    background: #f0f0f0 !important;
    font-weight: 700 !important;
    text-align: center !important;
  }

  td {
    padding: 10px 8px !important;
    border: 1px solid #000 !important;
    text-align: left !important;
  }

  /* Cellule signature pour émargement */
  td.signature-cell {
    min-height: 40px !important;
  }

  /* Masquer le footer du tableau sauf le total */
  .table-container>div:last-child {
    border-top: 2px solid black !important;
    padding: 10px !important;
    background: white !important;
    text-align: center !important;
    page-break-inside: avoid;
  }
}

/* ============================================
   Animations
   ============================================ */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in {
  animation: fadeIn var(--transition-base) ease-out;
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateX(-20px);
  }

  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.slide-in {
  animation: slideIn var(--transition-base) ease-out;
}

/* Loading Spinner */
.spinner {
  border: 4px solid var(--color-border);
  border-top: 4px solid var(--color-primary);
  border-radius: 50%;
  width: 40px;
  height: 40px;
  animation: spin 1s linear infinite;
  margin: var(--spacing-xl) auto;
}

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

  100% {
    transform: rotate(360deg);
  }
}
/* Statistiques supplémentaires */
.stat-sublabel { font-size: 0.75rem; color: var(--color-text-secondary); margin-top: var(--spacing-xs); }
.chart-card { background: var(--color-bg-card); padding: var(--spacing-xl); border-radius: var(--radius-lg); box-shadow: var(--shadow-md); border: 1px solid var(--color-border); }