:root {
  /* Palette de couleurs de la charte graphique IA-PRO */
  --bg: #F4F4FB;            /* --paper */
  --paper-2: #F0F0F8;
  --paper-3: #E8E8F4;
  --card: #FFFFFF;
  --ink: #1E1E2E;
  --ink-2: #4B5563;
  --ink-3: #9CA3AF;
  --line: #E0E0EF;
  --line-2: #D1D5DB;
  
  /* Couleurs de marque (Indigo/Purple) */
  --brand: #5B4FE8;         /* --amber */
  --brand2: #3730A3;        /* --amber-dark */
  --soft: #EEF0FB;          /* --amber-bg */
  --brand-line: #C7C9F0;    /* --amber-line */
  
  /* Couleurs de statut */
  --success: #65A30D;       /* --green */
  --success-bg: #F0F9E8;    /* --green-bg */
  --success-line: #CCEAAA;  /* --green-line */
  
  --error: #B91C1C;         /* --red */
  --error-bg: #FEE2E2;      /* --red-bg */
  --error-line: #FECACA;    /* --red-line */
  
  --blue: #6366F1;
  --blue-bg: #EEF2FF;
  --blue-line: #C7D2FE;
  
  --violet: #60A5FA;
  --violet-bg: #EFF6FF;
  --violet-line: #BFDBFE;
  
  --warn: #fff7ed;
  --warning: #f59e0b;
  --warning-bg: #fffbeb;
  --warning-text: #b45309;
  --warning-line: #fef3c7;

  /* Typographies de la charte */
  --serif: 'Plus Jakarta Sans', 'Inter', sans-serif;
  --sans: 'Inter', 'Plus Jakarta Sans', sans-serif;
  --mono: 'IBM Plex Mono', monospace;

  /* Arrondis */
  --r-sm: 6px;
  --r-md: 12px;
  --r-lg: 18px;

  /* Ombres */
  --sh-sm: 0 1px 2px rgba(30,30,46,.05);
  --sh-md: 0 4px 14px rgba(30,30,46,.07);
  --sh-lg: 0 16px 40px rgba(30,30,46,.10);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--sans);
  background: var(--bg);
  color: var(--ink);
  line-height: 1.55;
  min-height: 100vh;
  position: relative;
  /* Double gradient radial d'ambiance */
  background-image:
    radial-gradient(at 8% -10%, rgba(91, 79, 232, 0.08) 0, transparent 45%),
    radial-gradient(at 95% 110%, rgba(55, 48, 163, 0.06) 0, transparent 40%);
  background-attachment: fixed;
}

/* Effet de grain papier SVG */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  opacity: 0.35;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3CfeColorMatrix values='0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.025 0'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)'/%3E%3C/svg%3E");
}

::selection {
  background: var(--brand);
  color: #fff;
}

/* ==========================================================================
   LAYOUT & CONTAINERS
   ========================================================================== */

.hero {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 32px;
  padding: 56px 24px;
  max-width: 1080px;
  margin: auto;
  position: relative;
  z-index: 1;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 11.5px;
  font-weight: 800;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--brand2);
  background: var(--soft);
  border: 1px solid var(--brand-line);
  border-radius: 999px;
  padding: 5px 14px;
  margin-bottom: 14px;
}

h1 {
  font-family: var(--serif);
  font-size: clamp(28px, 4.5vw, 42px);
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: -0.5px;
  margin: 0.2em 0;
  color: var(--ink);
}

.lead {
  font-size: 1.15rem;
  color: var(--ink-2);
  max-width: 820px;
}

.actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 24px;
}

/* ==========================================================================
   BOUTONS DE LA CHARTE
   ========================================================================== */

button {
  font-family: var(--sans);
  font-weight: 800;
  font-size: 14px;
  border: none;
  cursor: pointer;
  border-radius: 10px;
  padding: 11px 22px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: transform 0.15s, box-shadow 0.15s, background-color 0.2s;
  background: var(--brand);
  color: white;
  box-shadow: var(--sh-sm);
}

button:hover {
  background-color: var(--brand2);
  box-shadow: var(--sh-md);
  transform: translateY(-1px);
}

button:active {
  transform: scale(0.97);
}

button.secondary {
  background: var(--ink);
  color: var(--bg);
}

button.secondary:hover {
  background: #000;
}

button.ghost {
  background: transparent;
  color: var(--ink-2);
  border: 1px solid var(--line-2);
  box-shadow: none;
}

button.ghost:hover {
  background: var(--paper-2);
}

/* ==========================================================================
   MODULES & CARDS
   ========================================================================== */

.course-card, .module {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  box-shadow: var(--sh-sm);
  position: relative;
  z-index: 1;
}

.course-card {
  padding: 24px;
  display: grid;
  gap: 6px;
  align-self: start;
}

.course-card strong {
  color: var(--ink-3);
  font-size: 0.75rem;
  text-transform: uppercase;
  font-weight: 700;
  letter-spacing: 0.5px;
}

.course-card span {
  margin-bottom: 14px;
  font-weight: 600;
  font-size: 0.95rem;
}

main {
  max-width: 1080px;
  margin: auto;
  padding: 0 24px 80px;
}

/* Sticky topbar progress */
.progress {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(244, 244, 251, 0.9);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 14px 24px;
  margin: 0 -24px 22px;
}

.progress span {
  font-family: var(--serif);
  font-weight: 700;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--ink-2);
}

.progress progress {
  flex-grow: 1;
  height: 8px;
  border-radius: 999px;
  border: none;
  -webkit-appearance: none;
  appearance: none;
}

.progress progress::-webkit-progress-bar {
  background-color: var(--paper-3);
  border-radius: 999px;
}

.progress progress::-webkit-progress-value {
  background: linear-gradient(90deg, var(--brand), #818CF8);
  border-radius: 999px;
  transition: width 0.4s ease;
}

.progress strong {
  font-family: var(--mono);
  font-size: 0.95rem;
  color: var(--brand);
}

.module {
  padding: 36px;
  margin: 24px 0;
}

h2 {
  font-family: var(--serif);
  font-size: 1.7rem;
  font-weight: 700;
  margin-top: 0;
  margin-bottom: 16px;
  color: var(--ink);
}

h3 {
  font-family: var(--serif);
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.grid article, .template-box, .exercise, .note {
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  padding: 20px;
}

.grid article {
  background: var(--card);
  box-shadow: var(--sh-sm);
  transition: transform 0.2s, box-shadow 0.2s;
}

.grid article:hover {
  transform: translateY(-2px);
  box-shadow: var(--sh-md);
}

.grid article h3 {
  font-family: var(--serif);
  font-size: 1.05rem;
  margin-bottom: 4px;
  color: var(--brand2);
}

.grid article p {
  font-size: 0.88rem;
  color: var(--ink-2);
}

.note {
  background: var(--soft);
  border-color: var(--brand-line);
  color: var(--brand2);
  font-size: 0.95rem;
}

.exercise {
  background: var(--paper-2);
  border-color: var(--paper-3);
  margin-top: 24px;
}

textarea, input[type=text] {
  width: 100%;
  border: 1.5px solid var(--line-2);
  border-radius: 10px;
  padding: 14px;
  font-family: var(--sans);
  background: white;
  transition: border-color 0.2s, box-shadow 0.2s;
}

textarea:focus, input[type=text]:focus {
  border-color: var(--brand);
  outline: none;
  box-shadow: 0 0 0 3px var(--soft);
}

textarea {
  min-height: 92px;
  resize: vertical;
}

.large {
  min-height: 200px;
}

.steps {
  padding-left: 20px;
}

.steps li {
  margin: 12px 0;
  padding-left: 6px;
}

.checklist {
  list-style: none;
  padding: 0;
}

.checklist li {
  padding: 8px 0;
  font-weight: 500;
}

.checklist label {
  cursor: pointer;
}

.checklist input[type="checkbox"] {
  accent-color: var(--brand);
  margin-right: 8px;
  transform: scale(1.1);
}

.scenario {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  align-items: center;
  margin: 20px 0;
}

.scenario span {
  background: var(--soft);
  border: 1px solid var(--brand-line);
  color: var(--brand2);
  padding: 10px 16px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 0.9rem;
}

/* ==========================================================================
   QUIZ SYSTEM
   ========================================================================== */

.quiz-item {
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  padding: 20px;
  margin: 16px 0;
  background: var(--card);
  box-shadow: var(--sh-sm);
  transition: all 0.25s ease;
}

.quiz-item.correct-quiz {
  border-color: var(--success);
  background-color: var(--success-bg);
}

.quiz-item.incorrect-quiz {
  border-color: var(--error);
  background-color: var(--error-bg);
}

.quiz-item label {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 10px 0;
  padding: 10px 14px;
  border: 1.5px solid var(--line);
  border-radius: 8px;
  cursor: pointer;
  font-weight: 600;
  font-size: 0.92rem;
  transition: all 0.2s;
  background: var(--bg);
}

.quiz-item label:hover {
  border-color: var(--brand);
  background: var(--soft);
}

.quiz-item input[type="radio"] {
  accent-color: var(--brand);
  transform: scale(1.15);
}

.quiz-explanation {
  margin-top: 12px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--ink-2);
  border-top: 1px dashed var(--line);
  padding-top: 10px;
}

.result {
  font-family: var(--serif);
  font-weight: 800;
  margin-top: 18px;
  padding: 14px;
  border-radius: 10px;
  text-align: center;
}

/* ==========================================================================
   INTERACTIVE COMPONENT STYLES (EXERCISES)
   ========================================================================== */

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  font-size: 0.75rem;
  font-weight: 700;
  border-radius: 9999px;
  text-transform: uppercase;
}

.badge-success {
  background-color: var(--success-bg);
  color: var(--success);
  border: 1px solid var(--success-line);
}

.badge-error {
  background-color: var(--error-bg);
  color: var(--error);
  border: 1px solid var(--error-line);
}

.badge-warning, .warning {
  background-color: var(--warning-bg) !important;
  color: var(--warning-text) !important;
  border: 1px solid var(--warning-line) !important;
}

/* Actions d'exercices */
.exercise-actions {
  display: flex;
  gap: 12px;
  margin: 18px 0;
}

/* Zone de feedback */
.exercise-feedback {
  margin-top: 16px;
  padding: 18px;
  border-radius: var(--r-md);
  font-weight: 600;
  display: none;
  font-size: 0.95rem;
  animation: fadeIn 0.3s ease;
  line-height: 1.55;
  box-shadow: var(--sh-sm);
}

.exercise-feedback p {
  margin: 6px 0;
}

.exercise-feedback.show {
  display: block;
}

.exercise-feedback.correct {
  background-color: var(--success-bg);
  border: 1px solid var(--success);
  color: #37530F;
}

.exercise-feedback.incorrect {
  background-color: var(--error-bg);
  border: 1px solid var(--error);
  color: #7F1D1D;
}

.exercise-feedback.warning {
  background-color: var(--warning-bg);
  border: 1px solid var(--warning);
  color: var(--warning-text);
}

/* Accordéon de correction */
.correction-accordion {
  margin-top: 16px;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--card);
  overflow: hidden;
  box-shadow: var(--sh-sm);
}

.correction-accordion summary {
  padding: 14px 20px;
  font-weight: 700;
  cursor: pointer;
  outline: none;
  transition: background 0.2s;
  user-select: none;
  color: var(--brand);
}

.correction-accordion summary:hover {
  background: var(--bg);
}

.correction-accordion[open] summary {
  border-bottom: 1px solid var(--line);
}

.accordion-content {
  padding: 20px;
  font-size: 0.95rem;
  line-height: 1.6;
}

.model-text {
  border-left: 4px solid var(--brand);
  padding: 12px 16px;
  color: var(--ink);
  font-style: italic;
  background: var(--bg);
  border-radius: 0 var(--r-md) var(--r-md) 0;
  margin: 10px 0;
}

/* Exercice 2: Drag and Drop */
.drag-cards-container {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  padding: 16px;
  background: var(--paper-3);
  border: 1.5px solid var(--line);
  border-radius: var(--r-md);
  margin-bottom: 20px;
  min-height: 72px;
  align-items: center;
}

.drag-card {
  background: var(--card);
  border: 1.5px solid var(--line);
  border-radius: 10px;
  padding: 10px 16px;
  cursor: grab;
  user-select: none;
  font-weight: 700;
  box-shadow: var(--sh-sm);
  transition: transform 0.2s, box-shadow 0.2s, background-color 0.2s, border-color 0.2s;
}

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

.drag-card:active {
  cursor: grabbing;
}

.drag-card.dragging {
  opacity: 0.4;
  border-style: dashed;
}

.drop-zones-container {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 20px;
}

.drop-zone {
  background: var(--card);
  border: 2px dashed var(--line);
  border-radius: var(--r-lg);
  padding: 16px;
  min-height: 200px;
  display: flex;
  flex-direction: column;
  transition: all 0.25s ease;
  box-shadow: var(--sh-sm);
}

.drop-zone h4 {
  margin-top: 0;
  margin-bottom: 12px;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--ink-2);
  border-bottom: 1px solid var(--line);
  padding-bottom: 8px;
  text-align: center;
}

.drop-zone-content {
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-height: 120px;
}

.drop-zone.dragover {
  border-color: var(--brand);
  background-color: var(--soft);
}

.drop-zone-content .drag-card {
  font-size: 0.88rem;
  padding: 8px 12px;
  width: 100%;
  text-align: center;
}

.drag-card.correct-card {
  border-color: var(--success) !important;
  background-color: var(--success-bg) !important;
  color: #37530F;
}

.drag-card.incorrect-card {
  border-color: var(--error) !important;
  background-color: var(--error-bg) !important;
  color: #7F1D1D;
}

/* Exercice 3: Cleaning Table */
.table-container {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  margin: 18px 0;
  background: white;
  box-shadow: var(--sh-sm);
}

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

.cleaning-table th {
  font-weight: 700;
  color: var(--ink-2);
  font-size: 0.8rem;
  text-transform: uppercase;
  background: var(--paper-2);
  border-bottom: 1px solid var(--line);
}

.cleaning-table td {
  padding: 14px 16px;
}

.cleaning-table tr {
  transition: background-color 0.25s ease;
  border-bottom: 1px solid var(--line);
}

.cleaning-table tr:last-child {
  border-bottom: none;
}

.cleaning-table tr.correct-row {
  background-color: var(--success-bg) !important;
}

.cleaning-table tr.incorrect-row {
  background-color: var(--error-bg) !important;
}

.cell-email {
  font-family: var(--mono);
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--ink);
}

.cell-action {
  white-space: nowrap;
}

.radio-label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  margin-right: 12px;
  font-weight: 700;
  font-size: 0.88rem;
  padding: 6px 10px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: var(--paper-2);
  transition: all 0.2s;
}

.radio-label:hover {
  background-color: var(--soft);
  border-color: var(--brand);
}

.radio-label input[type="radio"] {
  accent-color: var(--brand);
}

.row-explanation {
  font-size: 0.88rem;
  font-weight: 600;
  margin-top: 6px;
  white-space: normal;
}

.row-explanation.text-success {
  color: #37530F;
}

.row-explanation.text-error {
  color: var(--error);
}

/* Exercice 6: Sortable List */
.sortable-list {
  list-style: none;
  padding: 0;
  margin: 20px 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.sortable-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--card);
  border: 1.5px solid var(--line);
  border-radius: var(--r-md);
  padding: 14px 20px;
  box-shadow: var(--sh-sm);
  transition: all 0.2s ease;
}

.sortable-item:hover {
  border-color: var(--brand);
  transform: translateY(-1px);
  box-shadow: var(--sh-md);
}

.sortable-item.correct-item {
  border-color: var(--success);
  background-color: var(--success-bg);
}

.sortable-item.incorrect-item {
  border-color: var(--error);
  background-color: var(--error-bg);
}

.step-badge {
  font-size: 0.72rem;
  font-weight: 800;
  padding: 4px 8px;
  border-radius: 6px;
  text-transform: uppercase;
  margin-right: 12px;
  display: inline-block;
}

.text-trigger {
  background-color: var(--blue-bg);
  color: var(--blue);
  border: 1px solid var(--blue-line);
}

.text-delay {
  background-color: var(--warning-bg);
  color: var(--warning-text);
  border: 1px solid var(--warning-line);
}

.text-action {
  background-color: var(--success-bg);
  color: var(--success);
  border: 1px solid var(--success-line);
}

.item-content {
  display: flex;
  align-items: center;
  font-weight: 700;
  font-size: 0.95rem;
}

.item-actions {
  display: flex;
  gap: 6px;
}

.item-actions button {
  padding: 6px 12px;
  background-color: var(--bg);
  color: var(--ink);
  border: 1.5px solid var(--line);
  font-weight: 800;
  font-size: 0.9rem;
  border-radius: 8px;
  box-shadow: none;
}

.item-actions button:hover {
  background-color: var(--brand);
  color: white;
  border-color: var(--brand);
}

/* ==========================================================================
   COMPLETION SECTION (EXPORT PDF)
   ========================================================================== */

.end-course {
  background: linear-gradient(135deg, var(--brand) 0%, var(--brand2) 100%);
  color: white;
  border: none;
  text-align: center;
  padding: 44px 32px;
  border-radius: var(--r-lg);
  box-shadow: var(--sh-lg);
}

.end-course h2 {
  color: white;
  font-size: 2rem;
  margin-bottom: 12px;
  font-family: var(--serif);
  font-weight: 800;
}

.end-course p {
  color: rgba(255, 255, 255, 0.95);
  max-width: 680px;
  margin: 0 auto 24px;
  font-size: 1.1rem;
}

.end-course .actions {
  justify-content: center;
}

.end-course button {
  background-color: white !important;
  color: var(--brand) !important;
  font-size: 1.05rem;
  padding: 14px 28px;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.15);
  border-radius: 12px;
}

.end-course button:hover {
  background-color: #f8fafc !important;
  color: var(--brand2) !important;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.25);
}

/* Footer & Sources */
.sources {
  font-size: .95rem;
  color: var(--ink-2);
}

.sources h2 {
  font-family: var(--serif);
  font-size: 1.4rem;
  color: var(--ink);
}

footer {
  text-align: center;
  color: var(--ink-3);
  padding: 40px;
  font-weight: 500;
}

/* ==========================================================================
   ANIMATIONS & MEDIA QUERIES
   ========================================================================== */

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Responsive */
@media (max-width: 860px) {
  .hero {
    grid-template-columns: 1fr;
    padding: 32px 24px;
  }
  .grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .drop-zones-container {
    grid-template-columns: 1fr;
  }
  .drop-zone {
    min-height: 150px;
  }
  .module {
    padding: 24px;
  }
  .scenario {
    display: block;
  }
  .scenario > * {
    display: inline-block;
    margin: 4px;
  }
  .sortable-item {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }
  .item-actions {
    align-self: flex-end;
  }
}

@media (max-width: 560px) {
  .grid {
    grid-template-columns: 1fr;
  }
}

@media print {
  body {
    background: white;
    color: #111;
  }
  .no-print, .actions, button, .exercise-actions, .item-actions, .correction-accordion {
    display: none !important;
  }
  .hero, main {
    max-width: none;
    padding: 0;
  }
  .hero {
    display: block;
  }
  .course-card, .module {
    box-shadow: none;
    border: 1px solid #ccc;
    break-inside: avoid;
    margin: 14px 0;
  }
  .module {
    padding: 18px;
  }
  textarea, input {
    border: 1px solid #999;
  }
  .sources {
    display: block;
  }
  a {
    color: #111;
  }
  .exercise-feedback {
    display: block !important;
    border: 1px solid #aaa !important;
    background: transparent !important;
    color: #000 !important;
  }
}