/* ===== IMPORT FONTS ===== */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

/* ===== ROOT VARIABLES ===== */
:root {
  --primary: #a8dddf;
  --primary-light: #c8eef0;
  --primary-dark: #7cb8ba;
  --secondary: #3a8fff;

  --bg-body: #f8fafc;
  --bg-panel: #ffffff;
  --bg-light: #f1f5f9;
  --bg-hover: #f0f4f8;

  --text: #1e293b;
  --text-dim: #64748b;
  --text-light: #94a3b8;

  --border: #e2e8f0;
  --border-active: #cbd5e1;

  --shadow: rgba(0, 0, 0, 0.05);
  --success: #10b981;
  --warning: #f59e0b;
  --error: #ef4444;

  --radius: 12px;
  --radius-sm: 8px;
}

/* ===== RESET + ACCESSIBILITÉ ===== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  transition: background-color 0.2s, color 0.2s, border 0.2s;
}

*:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg-body);
  color: var(--text);
  font-size: 16px;
  line-height: 1.65;
  letter-spacing: 0.1px;
  height: auto;
  overflow-x: hidden;
  overflow-y: auto;
  -webkit-font-smoothing: antialiased;
}

/* ===== ANIMATIONS ===== */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px) scale(0.98);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.7; }
}

@keyframes typing-dots {
  0%, 60%, 100% { transform: translateY(0); }
  30% { transform: translateY(-3px); }
}

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

/* ===== SIDEBAR ===== */
.sidebar {
  width: 300px;
  background: #ffffff;
  border-right: 1px solid #f1f5f9;
  padding: 16px 12px;
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  z-index: 100;
  position: fixed;
  top: 0;
  left: 0;
  height: 100vh;
  gap: 8px;
}

.sidebar-top {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.sidebar-btn {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  padding: 10px 12px;
  border: none;
  border-radius: 8px;
  background: transparent;
  color: #1e293b;
  font-size: 0.9rem;
  font-weight: 500;
  font-family: inherit;
  cursor: pointer;
  text-align: left;
  transition: background 0.15s ease;
}

.sidebar-btn:hover {
  background: #f8fafc;
}

.sidebar-btn svg,
.sidebar-btn img {
  width: 18px;
  height: 18px;
  color: #64748b;
  flex-shrink: 0;
  display: block;
}

.sidebar-search {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  padding: 10px 14px;
  border-radius: 20px;
  border: 1.5px solid #e2e8f0;
  background: #ffffff;
  margin: 4px 0;
}

.sidebar-search svg {
  width: 18px;
  height: 18px;
  color: #64748b;
  flex-shrink: 0;
}

.sidebar-search input {
  flex: 1;
  border: none;
  background: transparent;
  font-size: 0.9rem;
  font-family: inherit;
  color: #1e293b;
  outline: none;
}

.sidebar-search input::placeholder {
  color: #94a3b8;
}

.sidebar-section {
  display: flex;
  flex-direction: column;
  gap: 2px;
  margin-top: 4px;
}

.sidebar-section-title {
  padding: 8px 12px;
  font-size: 0.8rem;
  font-weight: 500;
  color: #94a3b8;
  text-transform: none;
  letter-spacing: 0;
}

.sidebar ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.sidebar ul li {
  padding: 10px 12px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: background 0.15s ease;
  cursor: pointer;
  font-size: 0.9rem;
  color: #1e293b;
}

.sidebar ul li:hover {
  background: #f8fafc;
}

.sidebar ul li.active {
  background: #f1f5f9;
  font-weight: 500;
}

.sidebar ul li.active .chat-title {
  color: #1e293b;
  font-weight: 500;
}

.sidebar ul li .delete-btn {
  background: transparent;
  border: none;
  color: #94a3b8;
  padding: 4px;
  margin-left: 8px;
  cursor: pointer;
  font-size: 0.85em;
  border-radius: 4px;
  opacity: 0;
  transition: opacity 0.15s ease;
}

.sidebar ul li:hover .delete-btn {
  opacity: 1;
}

.sidebar ul li .delete-btn:hover {
  background: #f1f5f9;
  color: #ef4444;
}

.sidebar ul li .delete-btn img {
  width: 16px;
  height: 16px;
  display: block;
}

/* ===== MAIN CHAT AREA ===== */
.main {
  flex: 1;
  display: flex;
  flex-direction: column;
  margin-left: 300px;
  position: relative;
  background: var(--bg-body);
}

.chat-header {
  padding: 18px 24px;
  background: var(--bg-panel);
  border-bottom: 1px solid var(--border);
  font-weight: 600;
  font-size: 1.1rem;
  color: var(--text);
  position: fixed;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  box-shadow: 0 1px 3px var(--shadow);
  width: 100%;
}

/* ===== CHAT MESSAGES ===== */
.chat-box {
  flex: 1;
  padding: 24px;
  padding-bottom: 100px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-top: 60px;
}

/* ===== SCROLL INDICATOR ===== */
.scroll-indicator {
  position: fixed;
  right: 14px;
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 5px;
  z-index: 50;
  pointer-events: none;
}

.scroll-segment {
  width: 18px;
  height: 2px;
  background: #d1d5db;
  border-radius: 1px;
  transition: background 0.2s, width 0.2s;
}

.scroll-segment.active {
  background: #1e293b;
  width: 24px;
}

.message {
  padding: 16px 20px;
  border-radius: var(--radius-sm);
  max-width: 85%;
  font-size: 1rem;
  line-height: 1.6;
  animation: fadeIn 0.3s forwards;
  position: relative;
  transition: transform 0.2s ease;
}

.message:hover {
  transform: translateY(-2px);
}

.message.user {
  align-self: flex-end;
  background: #f0f0f0;
  color: #1e293b;
  border-radius: 24px;
  box-shadow: none;
  padding: 12px 24px;
}

.message.bot {
  align-self: flex-start;
  background: transparent;
  color: var(--text);
  border: none;
  border-radius: 0;
  box-shadow: none;
  padding: 6px 0;
}

.bot.typing {
  background: var(--bg-panel);
  color: transparent;
  position: relative;
  width: 140px;
  height: 44px;
}

.bot.typing::before {
  content: "Mentora écrit...";
  position: absolute;
  top: 16px;
  left: 20px;
  color: var(--text-dim);
  font-size: 0.9em;
}

.bot.typing::after {
  content: '•••';
  position: absolute;
  bottom: 14px;
  left: 20px;
  color: var(--primary);
  letter-spacing: 3px;
  animation: typing-dots 1.5s infinite;
}

/* ===== CHAT INPUT (Gemini style) ===== */
.chat-input {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 6px 10px;
  border: 1.5px solid #e2e8f0;
  border-radius: 28px;
  background: #ffffff;
  box-shadow: 0 1px 6px rgba(0, 0, 0, 0.06);
  position: absolute;
  bottom: 16px;
  left: 24px;
  right: 24px;
  z-index: 10;
}

.chat-input input {
  flex: 1;
  padding: 20px 16px;
  border: none;
  background: transparent;
  font-size: 1rem;
  font-family: inherit;
  color: #1e293b;
  outline: none;
}

.chat-input input::placeholder {
  color: #475569;
  font-size: 1.15rem;
  letter-spacing: 1px;
}

.input-icon-left,
.input-icon-right {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: none;
  border-radius: 50%;
  background: none;
  color: #64748b;
  cursor: pointer;
  padding: 0;
  transition: background 0.15s ease;
}

.input-icon-left:hover,
.input-icon-right:hover {
  background: #f1f5f9;
  color: #1e293b;
}

.input-icon-left:active,
.input-icon-right:active {
  transform: scale(0.92);
}

.input-icon-right img {
  width: 20px;
  height: 20px;
  display: block;
}

/* ===== RENAME INPUT ===== */
.rename-input {
  width: 100%;
  font-size: 1rem;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg-panel);
  color: var(--text);
  font-family: inherit;
}

.rename-input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 2px rgba(110, 64, 201, 0.1);
}

/* ===== TOGGLE BUTTON ===== */
#toggle-btn {
  display: none;
  position: fixed;
  top: 16px;
  left: 16px;
  background: none;
  border: none;
  padding: 0;
  width: 32px;
  height: 32px;
  z-index: 1500;
  cursor: pointer;
  display: none; /* Cacher par défaut */
}

#toggle-btn img {
  width: 100%;
  height: 100%;
  display: block;
}

#toggle-btn:hover {
  opacity: 0.8;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  .sidebar {
    width: 260px;
    position: fixed;
    top: 0;
    left: -280px;
    height: 100vh;
    z-index: 1000;
    padding-top: 70px;
  }

  .sidebar.active {
    left: 0;
  }

  .main {
    margin-left: 0;
  }

  .chat-box {
    padding: 16px;
    padding-bottom: 80px;
  }

  .message {
    max-width: 90%;
    padding: 14px 18px;
  }

  .chat-input {
    border-radius: 24px;
    padding: 4px 6px;
    left: 12px;
    right: 12px;
    bottom: 12px;
  }
  .scroll-indicator {
    right: 8px;
    gap: 4px;
  }
  .scroll-segment {
    width: 14px;
  }
  .scroll-segment.active {
    width: 18px;
  }
  .chat-input input {
    padding: 10px 6px;
  }
  #toggle-btn {
    display: flex;
  }

  .chat-header {
    padding: 16px;
    padding-left: 60px;
  }
}

/* ===== EXTRA EFFECTS ===== */
.sidebar,
.chat-header,
.chat-input {
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(6px);
}




.chat-box.empty {
  height: 150px;
  max-height: 150px;
  overflow: hidden;
  transition: max-height 0.4s ease;
}

.chat-box:not(.empty) {
  max-height: none;
  height: auto;
  overflow-y: visible;
}

/* ===== SÉLECTEUR DE NIVEAU ===== */
.message.niveau-selector {
  background: #a8dddf;
  border: none;
  border-radius: 16px;
  max-width: 320px;
  padding: 24px;
  margin-right: auto;
  margin-left: 0;
  box-shadow: none;
}

.niveau-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: #0f172a;
  margin: 0 0 16px 0;
  line-height: 1.3;
}

.niveau-buttons {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.niveau-btn {
  background: rgba(255, 255, 255, 0.35);
  color: #0f172a;
  border: none;
  border-radius: 10px;
  padding: 12px 16px;
  font-size: 0.95rem;
  font-weight: 500;
  font-family: inherit;
  cursor: pointer;
  transition: all 0.15s ease;
  text-align: left;
  width: 100%;
}

.niveau-btn:hover {
  background: rgba(255, 255, 255, 0.55);
  transform: translateY(-1px);
}

.niveau-btn.selected,
.niveau-btn:active {
  background: #000000;
  color: #ffffff;
  transform: scale(0.98);
}

@media (max-width: 768px) {
  .message.niveau-selector {
    max-width: 90%;
    padding: 20px;
  }

  .niveau-title {
    font-size: 1.1rem;
  }

  .niveau-btn {
    padding: 10px 14px;
    font-size: 0.9rem;
  }
}

/* ===== ACTIONS DU SOMMAIRE ===== */
.sommaire-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  background: transparent;
  border: none;
  box-shadow: none;
  padding: 0;
}

.sommaire-action-btn {
  padding: 12px 24px;
  border-radius: 12px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s ease;
  border: none;
  font-family: inherit;
}

.btn-commencons {
  background: #a8dddf;
  color: #0f172a;
}

.btn-commencons:hover {
  background: #7cb8ba;
  transform: translateY(-2px);
}

.btn-desaccord {
  background: #ffffff;
  color: #64748b;
  border: 1px solid #e2e8f0;
}

.btn-desaccord:hover {
  background: #f1f5f9;
  color: #1e293b;
  transform: translateY(-2px);
}

/* ===== ACTIONS DE COMPREHENSION ===== */
.comprehension-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  background: transparent;
  border: none;
  box-shadow: none;
  padding: 8px 0;
}

.comprehension-btn {
  padding: 10px 18px;
  border-radius: 20px;
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s ease;
  font-family: inherit;
  border: 1px solid #e2e8f0;
}

.btn-compris {
  background: #dcfce7;
  color: #166534;
  border-color: #bbf7d0;
}

.btn-compris:hover {
  background: #bbf7d0;
  transform: translateY(-2px);
}

.btn-pas-compris {
  background: #fee2e2;
  color: #991b1b;
  border-color: #fecaca;
}

.btn-pas-compris:hover {
  background: #fecaca;
  transform: translateY(-2px);
}

.btn-question {
  background: #dbeafe;
  color: #1e40af;
  border-color: #bfdbfe;
}

.btn-question:hover {
  background: #bfdbfe;
  transform: translateY(-2px);
}

@media (max-width: 768px) {
  .comprehension-actions {
    gap: 8px;
  }
  .comprehension-btn {
    padding: 8px 14px;
    font-size: 0.85rem;
  }
}

/* ===== THEMES ABORDES ===== */
.themes-abordes {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  padding: 0;
}

.themes-header {
  padding: 20px 24px 16px;
}

.themes-header h2 {
  font-size: 1.4rem;
  font-weight: 700;
  color: #1e293b;
  margin: 0;
}

.themes-body {
  padding: 0 24px 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.theme-item {
  display: flex;
  flex-direction: column;
}

.theme-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 16px;
  border-radius: 4px;
}

.theme-numero {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background: rgba(0, 0, 0, 0.15);
  border-radius: 2px;
  font-size: 1.1rem;
  font-weight: 700;
  color: #1e293b;
  flex-shrink: 0;
}

.theme-titre {
  font-size: 1.1rem;
  font-weight: 600;
  color: #1e293b;
}

.theme-description {
  padding: 10px 16px 0 60px;
  font-size: 0.9rem;
  color: #475569;
  line-height: 1.5;
}

@media (max-width: 768px) {
  .themes-header h2 {
    font-size: 1.2rem;
  }
  .themes-body {
    padding: 0 16px 16px;
    gap: 12px;
  }
  .theme-description {
    padding: 8px 12px 0 48px;
    font-size: 0.85rem;
  }
  .theme-numero {
    width: 28px;
    height: 28px;
    font-size: 1rem;
  }
}

/* ===== CARTE DE CHAPITRE ===== */
.chapitre-message {
  background: #ffffff;
  border: 1px solid #e2e8f0;
  border-radius: 16px;
  padding: 0;
  max-width: 95%;
  overflow: hidden;
}

.chapitre-cours {
  padding: 32px 36px;
  background: #fdfcfa;
  border-radius: 16px;
}

.chapitre-badge {
  display: inline-block;
  background: #f5d0a0;
  color: #1e293b;
  font-size: 0.8rem;
  font-weight: 600;
  padding: 6px 18px;
  border-radius: 6px 0 0 6px;
  position: relative;
  margin-bottom: 20px;
}

.chapitre-badge::after {
  content: "";
  position: absolute;
  right: -12px;
  top: 0;
  width: 0;
  height: 0;
  border-top: 14px solid transparent;
  border-bottom: 14px solid transparent;
  border-left: 12px solid #f5d0a0;
}

.chapitre-titre {
  font-family: 'Georgia', 'Times New Roman', serif;
  font-size: 2.8rem;
  font-weight: 700;
  color: #2d5a5a;
  margin: 0 0 20px 0;
  line-height: 1.1;
  letter-spacing: -1px;
}

.chapitre-section {
  padding: 14px 20px;
  border-radius: 8px;
  margin-bottom: 12px;
  font-size: 1rem;
  font-weight: 600;
  color: #1e293b;
  line-height: 1.4;
}

.chapitre-section .section-label {
  display: block;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  opacity: 0.7;
  margin-bottom: 4px;
}

.chapitre-sous-titre {
  background: #d6d5f5;
}

.chapitre-question-section {
  background: #f8cdc0;
}

.chapitre-question-wrapper {
  background: transparent;
  border: none;
  box-shadow: none;
  padding: 0;
}

@media (max-width: 768px) {
  .chapitre-cours {
    padding: 24px 20px;
  }
  .chapitre-titre {
    font-size: 2rem;
  }
  .chapitre-section {
    padding: 12px 16px;
    font-size: 0.9rem;
  }
}

/* ===== QCM ===== */
.qcm-message {
  background: transparent;
  border: none;
  box-shadow: none;
  padding: 0;
}

.qcm-container {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  padding: 0;
}

.qcm-header {
  margin-bottom: 16px;
}

.qcm-header h3 {
  font-size: 1.1rem;
  font-weight: 600;
  color: #1e293b;
  margin: 0 0 4px 0;
}

.qcm-header p {
  font-size: 0.9rem;
  color: #64748b;
  margin: 0;
}

.qcm-question {
  font-size: 1.05rem;
  font-weight: 500;
  color: #1e293b;
  margin: 0 0 16px 0;
  line-height: 1.5;
}

.qcm-options {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.qcm-option {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border-radius: 6px;
  background: #c8eef0;
  cursor: pointer;
  transition: all 0.15s ease;
  border: none;
  text-align: left;
  font-family: inherit;
}

.qcm-option:hover {
  background: #a8dddf;
  transform: translateY(-1px);
}

.qcm-option.selected-correct {
  background: #bbf7d0;
  color: #166534;
}

.qcm-option.selected-wrong {
  background: #fecaca;
  color: #991b1b;
}

.qcm-badge {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  background: rgba(0, 0, 0, 0.15);
  border-radius: 2px;
  font-size: 0.95rem;
  font-weight: 700;
  color: #1e293b;
  flex-shrink: 0;
}

.qcm-option-text {
  font-size: 0.95rem;
  color: #1e293b;
  line-height: 1.3;
}

@media (max-width: 768px) {
  .qcm-options {
    grid-template-columns: 1fr;
  }
  .qcm-question {
    font-size: 0.95rem;
  }
}

/* ===== QCM MODAL ===== */
.qcm-modal {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.25s ease;
}

.qcm-modal.hidden {
  opacity: 0;
  pointer-events: none;
}

.qcm-modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.35);
  backdrop-filter: blur(4px);
}

.qcm-modal-card {
  position: relative;
  background: #ffffff;
  border-radius: 20px;
  padding: 36px 28px;
  width: 90%;
  max-width: 320px;
  text-align: center;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
  transform: scale(1);
  transition: transform 0.25s ease;
}

.qcm-modal.hidden .qcm-modal-card {
  transform: scale(0.9);
}

.qcm-modal-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 16px auto;
}

.qcm-modal.success .qcm-modal-icon {
  color: #22c55e;
}

.qcm-modal.error .qcm-modal-icon {
  color: #ef4444;
}

.qcm-modal-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.qcm-modal.success .qcm-modal-title {
  color: #166534;
}

.qcm-modal.error .qcm-modal-title {
  color: #991b1b;
}

.qcm-modal-text {
  font-size: 0.95rem;
  color: #64748b;
  margin-bottom: 20px;
  line-height: 1.5;
}

.qcm-modal-btn {
  padding: 10px 24px;
  border-radius: 10px;
  border: none;
  font-size: 1rem;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: background 0.15s ease;
}

.qcm-modal.success .qcm-modal-btn {
  background: #22c55e;
  color: #ffffff;
}

.qcm-modal.success .qcm-modal-btn:hover {
  background: #16a34a;
}

.qcm-modal.error .qcm-modal-btn {
  background: #ef4444;
  color: #ffffff;
}

.qcm-modal.error .qcm-modal-btn:hover {
  background: #dc2626;
}

/* ===== STICKERS ===== */
.sticker-img {
  display: block;
  width: 120px;
  height: auto;
  margin: 0 auto 12px auto;
}