/* ========================================
   LE MENTOR BÉNINOIS - LMS STYLES
   Esthétique scolaire professionnelle
   ======================================== */

:root {
  /* Palette Scolaire Béninoise */
  --color-primary: #1a472a; /* Vert foncé (drapeau béninois) */
  --color-secondary: #fcd116; /* Jaune (drapeau béninois) */
  --color-accent: #e8112d; /* Rouge (drapeau béninois) */

  --color-bg-main: #f5f5f0; /* Papier légèrement jauni */
  --color-bg-card: #ffffff;
  --color-bg-header: #2d5016;

  --color-text-primary: #1a1a1a;
  --color-text-secondary: #4a4a4a;
  --color-text-muted: #7a7a7a;

  --color-border: #d4d4d0;
  --color-border-dark: #8a8a80;

  /* Notes / Grading Colors */
  --color-grade-excellent: #2d5016; /* 16-20: Très Bien */
  --color-grade-bien: #4a7c2e; /* 14-15: Bien */
  --color-grade-ab: #7da64f; /* 12-13: Assez Bien */
  --color-grade-passable: #d4a017; /* 10-11: Passable */
  --color-grade-insuffisant: #c45911; /* 08-09: Insuffisant */
  --color-grade-mediocre: #b8001f; /* 00-07: Médiocre */

  /* Typography */
  --font-primary: 'Georgia', 'Times New Roman', serif;
  --font-secondary: 'Arial', 'Helvetica', sans-serif;

  /* Spacing */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-xxl: 48px;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 2px 8px rgba(0, 0, 0, 0.12);
  --shadow-lg: 0 4px 16px rgba(0, 0, 0, 0.15);
}

/* ========================================
   RESET & BASE
   ======================================== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: var(--font-secondary);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text-primary);
  background: var(--color-bg-main);
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-primary);
  font-weight: 700;
  line-height: 1.3;
  color: var(--color-primary);
}

/* ========================================
   LAYOUT
   ======================================== */
.app-container {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ========================================
   HEADER / EN-TÊTE
   ======================================== */
.app-header {
  background: linear-gradient(135deg, var(--color-bg-header) 0%, var(--color-primary) 100%);
  color: white;
  padding: var(--space-lg) var(--space-md);
  box-shadow: var(--shadow-md);
  border-bottom: 4px solid var(--color-secondary);
}

.header-content {
  max-width: 1200px;
  margin: 0 auto;
}

.app-title {
  font-size: 1.75rem;
  margin-bottom: var(--space-xs);
  color: white;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.app-subtitle {
  font-size: 0.9rem;
  opacity: 0.9;
  font-family: var(--font-secondary);
  font-weight: 400;
}

.header-divider {
  height: 2px;
  background: var(--color-secondary);
  margin: var(--space-md) 0;
  opacity: 0.6;
}

.student-info {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-md);
  font-size: 0.875rem;
}

.student-name {
  font-weight: 600;
}

.average-display {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  background: rgba(255, 255, 255, 0.1);
  padding: var(--space-sm) var(--space-md);
  border-radius: 4px;
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.average-label {
  opacity: 0.8;
}

.average-value {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-secondary);
}

/* ========================================
   NAVIGATION
   ======================================== */
.main-nav {
  background: white;
  border-bottom: 2px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  gap: 0;
}

.nav-tab {
  flex: 1;
  padding: var(--space-md);
  background: none;
  border: none;
  border-bottom: 3px solid transparent;
  font-family: var(--font-secondary);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: all 0.2s ease;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.nav-tab:hover {
  background: var(--color-bg-main);
  color: var(--color-primary);
}

.nav-tab.active {
  color: var(--color-primary);
  border-bottom-color: var(--color-secondary);
  background: var(--color-bg-main);
}

/* ========================================
   MAIN CONTENT
   ======================================== */
.main-content {
  flex: 1;
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
  padding: var(--space-xl) var(--space-md);
}

.section-title {
  font-size: 1.5rem;
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-sm);
  border-bottom: 3px solid var(--color-secondary);
  color: var(--color-primary);
}

/* ========================================
   CARNET DE NOTES (GRADEBOOK)
   ======================================== */
.gradebook-container {
  background: white;
  border: 2px solid var(--color-border-dark);
  border-radius: 4px;
  box-shadow: var(--shadow-md);
}

.gradebook-header {
  background: var(--color-primary);
  color: white;
  padding: var(--space-md);
  font-family: var(--font-primary);
  font-size: 1.1rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
}

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

.grades-table th {
  background: var(--color-bg-main);
  padding: var(--space-md);
  text-align: left;
  font-weight: 700;
  font-size: 0.875rem;
  text-transform: uppercase;
  color: var(--color-primary);
  border-bottom: 2px solid var(--color-border-dark);
}

.grades-table td {
  padding: var(--space-md);
  border-bottom: 1px solid var(--color-border);
}

.grades-table tr:hover {
  background: var(--color-bg-main);
}

.grade-badge {
  display: inline-block;
  padding: var(--space-xs) var(--space-md);
  border-radius: 4px;
  font-weight: 700;
  font-size: 1.1rem;
  min-width: 60px;
  text-align: center;
  color: white;
}

.grade-badge.excellent { background: var(--color-grade-excellent); }
.grade-badge.bien { background: var(--color-grade-bien); }
.grade-badge.ab { background: var(--color-grade-ab); }
.grade-badge.passable { background: var(--color-grade-passable); }
.grade-badge.insuffisant { background: var(--color-grade-insuffisant); }
.grade-badge.mediocre { background: var(--color-grade-mediocre); }

.appreciation {
  font-style: italic;
  color: var(--color-text-secondary);
  font-size: 0.875rem;
  margin-top: var(--space-xs);
}

.no-grades-message {
  padding: var(--space-xxl);
  text-align: center;
  color: var(--color-text-muted);
  font-style: italic;
}

/* ========================================
   EXERCICES (EXERCISES)
   ======================================== */
.exercises-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--space-lg);
}

.exercise-card {
  background: white;
  border: 2px solid var(--color-border);
  border-radius: 4px;
  padding: var(--space-lg);
  box-shadow: var(--shadow-sm);
  transition: all 0.2s ease;
  cursor: pointer;
}

.exercise-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.exercise-level {
  display: inline-block;
  padding: var(--space-xs) var(--space-sm);
  background: var(--color-primary);
  color: white;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  border-radius: 3px;
  margin-bottom: var(--space-sm);
}

.exercise-title {
  font-size: 1.1rem;
  margin-bottom: var(--space-sm);
  color: var(--color-primary);
}

.exercise-subject {
  color: var(--color-text-secondary);
  font-size: 0.875rem;
  margin-bottom: var(--space-md);
}

.exercise-meta {
  display: flex;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--color-text-muted);
  padding-top: var(--space-sm);
  border-top: 1px solid var(--color-border);
}

/* ========================================
   MODAL / EXERCICE VIEW
   ======================================== */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: var(--space-md);
}

.modal-content {
  background: white;
  border: 3px solid var(--color-primary);
  border-radius: 4px;
  max-width: 900px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
}

.modal-header {
  background: var(--color-primary);
  color: white;
  padding: var(--space-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.modal-title {
  font-size: 1.3rem;
  color: white;
}

.modal-close-btn {
  background: none;
  border: none;
  color: white;
  font-size: 1.5rem;
  cursor: pointer;
  padding: var(--space-sm);
  line-height: 1;
}

.modal-body {
  padding: var(--space-xl);
}

.question-section {
  background: var(--color-bg-main);
  border-left: 4px solid var(--color-primary);
  padding: var(--space-lg);
  margin-bottom: var(--space-lg);
}

.question-label {
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--space-sm);
  text-transform: uppercase;
  font-size: 0.875rem;
  letter-spacing: 0.5px;
}

.question-text {
  font-size: 1.1rem;
  line-height: 1.8;
  font-family: var(--font-primary);
}

.answer-section {
  margin-bottom: var(--space-xl);
}

.answer-textarea {
  width: 100%;
  min-height: 200px;
  padding: var(--space-md);
  border: 2px solid var(--color-border);
  border-radius: 4px;
  font-family: var(--font-secondary);
  font-size: 1rem;
  line-height: 1.6;
  resize: vertical;
  transition: border-color 0.2s ease;
}

.answer-textarea:focus {
  outline: none;
  border-color: var(--color-primary);
}

.answer-textarea::placeholder {
  color: var(--color-text-muted);
  font-style: italic;
}

.hints-section {
  background: #fffbeb;
  border: 2px solid #fcd34d;
  border-radius: 4px;
  padding: var(--space-lg);
  margin-bottom: var(--space-lg);
}

.hint-item {
  padding: var(--space-md);
  background: white;
  border-left: 3px solid #f59e0b;
  margin-bottom: var(--space-sm);
}

.hint-item:last-child {
  margin-bottom: 0;
}

.feedback-section {
  background: var(--color-bg-main);
  border: 2px solid var(--color-border-dark);
  border-radius: 4px;
  padding: var(--space-lg);
  margin-bottom: var(--space-lg);
}

.feedback-grade {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-md);
  border-bottom: 2px solid var(--color-border);
}

.feedback-label {
  font-weight: 700;
  color: var(--color-primary);
  text-transform: uppercase;
  font-size: 0.875rem;
}

.feedback-comments {
  line-height: 1.8;
  color: var(--color-text-primary);
}

.feedback-comments p {
  margin-bottom: var(--space-sm);
}

.action-buttons {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
}

.btn {
  padding: var(--space-md) var(--space-lg);
  border: none;
  border-radius: 4px;
  font-weight: 700;
  font-size: 0.9rem;
  cursor: pointer;
  transition: all 0.2s ease;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

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

.btn-primary:hover {
  background: var(--color-bg-header);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

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

.btn-secondary:hover {
  background: #e5c100;
  transform: translateY(-1px);
}

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

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

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* ========================================
   TABLEAU DE BORD (DASHBOARD)
   ======================================== */
.dashboard-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-lg);
  margin-bottom: var(--space-xl);
}

.stat-card {
  background: white;
  border: 2px solid var(--color-border);
  border-radius: 4px;
  padding: var(--space-lg);
  box-shadow: var(--shadow-sm);
  text-align: center;
}

.stat-icon {
  font-size: 2.5rem;
  margin-bottom: var(--space-sm);
}

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

.stat-label {
  color: var(--color-text-secondary);
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.progress-chart {
  background: white;
  border: 2px solid var(--color-border);
  border-radius: 4px;
  padding: var(--space-lg);
  box-shadow: var(--shadow-sm);
}

.chart-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--space-lg);
}

.progress-bar-container {
  margin-bottom: var(--space-lg);
}

.progress-bar-label {
  display: flex;
  justify-content: space-between;
  margin-bottom: var(--space-xs);
  font-size: 0.875rem;
}

.progress-bar {
  height: 24px;
  background: var(--color-bg-main);
  border: 2px solid var(--color-border);
  border-radius: 4px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: var(--color-primary);
  transition: width 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  padding-right: var(--space-sm);
  color: white;
  font-weight: 700;
  font-size: 0.75rem;
}

/* ========================================
   MÉTHODOLOGIE SECTION
   ======================================== */
.methodology-content {
  background: white;
  border: 2px solid var(--color-border);
  border-radius: 4px;
  padding: var(--space-xl);
  box-shadow: var(--shadow-sm);
}

.methodology-section {
  margin-bottom: var(--space-xl);
}

.methodology-section h3 {
  font-size: 1.2rem;
  color: var(--color-primary);
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-sm);
  border-bottom: 2px solid var(--color-secondary);
}

.methodology-section ol,
.methodology-section ul {
  padding-left: var(--space-xl);
  line-height: 1.8;
}

.methodology-section li {
  margin-bottom: var(--space-sm);
}

.methodology-example {
  background: var(--color-bg-main);
  border-left: 4px solid var(--color-accent);
  padding: var(--space-md);
  margin: var(--space-md) 0;
  font-style: italic;
}

/* ========================================
   RESPONSIVE
   ======================================== */
@media (max-width: 768px) {
  .app-title {
    font-size: 1.3rem;
  }

  .student-info {
    flex-direction: column;
    align-items: flex-start;
  }

  .nav-container {
    flex-direction: column;
  }

  .nav-tab {
    border-bottom: 1px solid var(--color-border);
    border-left: 3px solid transparent;
  }

  .nav-tab.active {
    border-bottom-color: var(--color-border);
    border-left-color: var(--color-secondary);
  }

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

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

  .grades-table {
    font-size: 0.875rem;
  }

  .grades-table th,
  .grades-table td {
    padding: var(--space-sm);
  }

  .action-buttons {
    flex-direction: column;
  }

  .btn {
    width: 100%;
  }
}

/* ========================================
   PRINT STYLES (pour impression Carnet)
   ======================================== */
@media print {
  .main-nav,
  .action-buttons,
  .modal-close-btn {
    display: none;
  }

  .modal-overlay {
    position: static;
    background: none;
  }

  .modal-content {
    border: none;
    box-shadow: none;
    max-height: none;
  }

  body {
    background: white;
  }
}

/* ========================================
   ANIMATIONS
   ======================================== */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.exercise-card,
.stat-card,
.gradebook-container {
  animation: fadeIn 0.3s ease;
}