/* ====================================
   VARIABLES CSS POUR LES THÈMES
   ==================================== */
:root {
  /* Thème clair */
  --bg-primary: linear-gradient(135deg, #f9f9f9, #e0f7fa);
  --bg-secondary: #ffffff;
  --bg-card: #ffffff;
  --text-primary: #333;
  --text-secondary: #666;
  --text-tertiary: #555;
  --border-color: #e0e0e0;
  --shadow: rgba(0, 0, 0, 0.08);
  --shadow-hover: rgba(0, 0, 0, 0.15);
  
  /* Couleurs principales */
  --color-primary: #1e88e5;
  --color-primary-dark: #0d47a1;
  --color-primary-light: #64b5f6;
  --color-success: #4caf50;
  --color-error: #e53935;
  --badge-locked: #cccccc;
}

body.dark-mode {
  /* Thème sombre */
  --bg-primary: linear-gradient(135deg, #1a1a2e, #16213e);
  --bg-secondary: #0f1419;
  --bg-card: #1e2a3a;
  --text-primary: #e8e8e8;
  --text-secondary: #b0b0b0;
  --text-tertiary: #d0d0d0;
  --border-color: #2a3f5f;
  --shadow: rgba(0, 0, 0, 0.3);
  --shadow-hover: rgba(0, 0, 0, 0.5);
  --badge-locked: #444444;
}

/* ====================================
   GLOBAL STYLES
   ==================================== */
* {
  box-sizing: border-box;
  transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}

body {
  font-family: "Poppins", sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  margin: 0;
  padding: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
}

.hidden {
  display: none;
}

/* ====================================
   HEADER - TOUS ÉCRANS
   ==================================== */
header {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  color: white;
  padding: 15px 25px;
  box-shadow: 0 3px 10px var(--shadow-hover);
  flex-shrink: 0;
}

.header-content {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: nowrap;
}

header h1 {
  color: white;
  margin: 0;
  font-size: 1.6rem;
  font-weight: 700;
}

.header-right,
.header-buttons {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: nowrap;
}

.header-btn {
  color: white;
  text-decoration: none;
  padding: 8px 16px;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 8px;
  transition: all 0.3s ease;
  font-size: 0.95rem;
  font-weight: 500;
  height: 36px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.header-btn:hover {
  background: rgba(255, 255, 255, 0.3);
  transform: translateY(-2px);
}

.btn-icon {
  font-size: 1rem;
}

/* Bouton thème */
.theme-toggle {
  background: rgba(255, 255, 255, 0.2);
  border: none;
  color: white;
  padding: 8px 12px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 1.1rem;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 36px;
  min-width: 40px;
}

.theme-toggle:hover {
  background: rgba(255, 255, 255, 0.3);
  transform: translateY(-2px);
}

/* Bouton astuce */
.tip-btn {
  background: rgba(255, 255, 255, 0.2);
  border: none;
  color: white;
  padding: 8px 12px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 1.1rem;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 36px;
  min-width: 40px;
}

.tip-btn:hover {
  background: rgba(255, 255, 255, 0.3);
  transform: translateY(-2px);
}

/* Bouton profil avec photo */
/* ====================================
   BOUTON PROFIL AVEC PHOTO - RECTANGULAIRE
   ==================================== */
.profile-menu-container {
  position: relative;
  display: inline-block;
  order: 999; /* Place le bouton à droite */
}

.profile-btn {
  background: rgba(255, 255, 255, 0.2);
  border: none;
  color: white;
  padding: 6px 12px;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 36px;
  min-width: 100px;
  font-size: 0.95rem;
  font-weight: 500;
}

.profile-btn:hover {
  background: rgba(255, 255, 255, 0.3);
  transform: translateY(-2px);
}

.profile-btn-photo {
  width: 24px;
  height: 24px;
  border-radius: 4px;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.profile-btn img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 4px;
}

.profile-btn .profile-icon {
  font-size: 1rem;
}

.profile-btn-text {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 120px;
}

/* Menu déroulant */
.profile-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  background: var(--bg-secondary);
  border: 2px solid var(--border-color);
  border-radius: 8px;
  box-shadow: 0 4px 12px var(--shadow-hover);
  min-width: 180px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all 0.3s ease;
  z-index: 1000;
  overflow: hidden;
}

.profile-menu-container:hover .profile-dropdown,
.profile-dropdown:hover {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.profile-dropdown-header {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-color);
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  color: white;
}

.profile-dropdown-username {
  font-weight: 600;
  font-size: 0.95rem;
}

.profile-dropdown-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  color: var(--text-primary);
  text-decoration: none;
  transition: all 0.2s ease;
  cursor: pointer;
  border: none;
  background: none;
  width: 100%;
  text-align: left;
  font-size: 0.9rem;
}

.profile-dropdown-link:hover {
  background: rgba(30, 136, 229, 0.1);
  color: var(--color-primary);
}

.profile-dropdown-link.logout {
  color: var(--color-error);
  border-top: 1px solid var(--border-color);
}

.profile-dropdown-link.logout:hover {
  background: rgba(229, 57, 53, 0.1);
}

/* Popup astuce zoom */
.zoom-tip-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.7);
  z-index: 9999;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
}

.zoom-tip-overlay.show {
  opacity: 1;
  visibility: visible;
}

.zoom-tip-popup {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0);
  background: var(--bg-secondary);
  padding: 30px;
  border-radius: 16px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
  z-index: 10000;
  text-align: center;
  max-width: 400px;
  opacity: 0;
  transition: all 0.3s ease;
}

.zoom-tip-popup.show {
  transform: translate(-50%, -50%) scale(1);
  opacity: 1;
}

.zoom-tip-popup-icon {
  font-size: 3rem;
  margin-bottom: 15px;
}

.zoom-tip-popup h3 {
  color: var(--color-primary);
  margin: 0 0 15px 0;
  font-size: 1.5rem;
}

.zoom-tip-popup p {
  color: var(--text-primary);
  margin: 0 0 10px 0;
  line-height: 1.6;
  font-size: 1rem;
}

.zoom-shortcuts {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin: 20px 0;
  text-align: left;
}

.shortcut-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 15px;
  background: var(--bg-card);
  border-radius: 8px;
  border: 1px solid var(--border-color);
}

.shortcut-keys {
  display: flex;
  gap: 5px;
  flex: 1;
}

.shortcut-key {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  color: white;
  padding: 5px 10px;
  border-radius: 5px;
  font-weight: 600;
  font-size: 0.85rem;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.shortcut-description {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.zoom-tip-close {
  padding: 12px 28px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  color: white;
  border: none;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: 0.3s;
  margin-top: 10px;
}

.zoom-tip-close:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(30, 136, 229, 0.4);
}

/* ====================================
   HOME PAGE STYLES
   ==================================== */
.home-main {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px 20px;
}

.hero-section {
  max-width: 700px;
  background: var(--bg-secondary);
  padding: 50px 40px;
  border-radius: 16px;
  box-shadow: 0 8px 24px var(--shadow);
  text-align: center;
}

.hero-content h2 {
  color: var(--color-primary);
  font-size: 2rem;
  margin: 0 0 12px 0;
  font-weight: 700;
}

.subtitle {
  color: var(--text-secondary);
  font-size: 1.1rem;
  margin: 0 0 20px 0;
  font-weight: 500;
}

.description {
  color: var(--text-tertiary);
  font-size: 1.05rem;
  line-height: 1.6;
  margin: 0 0 35px 0;
}

.cta-buttons {
  margin-bottom: 25px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: 10px;
  text-decoration: none;
  font-weight: 600;
  font-size: 1.05rem;
  transition: all 0.3s ease;
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  color: white;
  box-shadow: 0 4px 12px rgba(30, 136, 229, 0.3);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 20px rgba(30, 136, 229, 0.4);
}

.btn-large {
  padding: 16px 36px;
  font-size: 1.15rem;
}

.btn-secondary {
  background: var(--bg-secondary);
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
  padding: 12px 24px;
}

.btn-secondary:hover {
  background: var(--color-primary);
  color: white;
  transform: translateY(-2px);
}

.or-divider {
  margin: 25px 0;
  position: relative;
  text-align: center;
}

.or-divider::before,
.or-divider::after {
  content: "";
  position: absolute;
  top: 50%;
  width: 40%;
  height: 1px;
  background: var(--border-color);
}

.or-divider::before {
  left: 0;
}

.or-divider::after {
  right: 0;
}

.or-divider span {
  background: var(--bg-secondary);
  padding: 0 15px;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.auth-buttons {
  display: flex;
  gap: 15px;
  justify-content: center;
  margin-bottom: 35px;
}

.features {
  display: flex;
  justify-content: center;
  gap: 30px;
  margin: 35px 0 25px 0;
  flex-wrap: wrap;
}

.feature-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--text-tertiary);
  font-size: 0.95rem;
}

.feature-icon {
  font-size: 2rem;
}

.info-text {
  background: rgba(30, 136, 229, 0.1);
  border-left: 4px solid var(--color-primary);
  padding: 15px 20px;
  border-radius: 8px;
  color: var(--text-tertiary);
  font-size: 0.95rem;
  text-align: left;
  margin-top: 30px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  margin-bottom: 8px;
  color: var(--text-primary);
  font-weight: 600;
  font-size: 0.95rem;
}

.form-group input {
  width: 100%;
  padding: 12px 15px;
  border: 2px solid var(--border-color);
  border-radius: 8px;
  font-size: 1rem;
  transition: 0.3s;
  font-family: "Poppins", sans-serif;
  background: var(--bg-secondary);
  color: var(--text-primary);
}

.form-group input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 8px rgba(30, 136, 229, 0.2);
}

/* ====================================
   PROFILE PAGE
   ==================================== */
.profile-photo-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 15px;
  margin-bottom: 20px;
}

.profile-photo {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  overflow: hidden;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  color: white;
  box-shadow: 0 4px 12px var(--shadow);
  position: relative;
  flex-shrink: 0;
}

.profile-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  max-width: 120px;
  max-height: 120px;
}

#profile-photo-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
}

.profile-photo-upload-btn {
  padding: 10px 20px;
  background: var(--color-primary);
  color: white;
  border-radius: 8px;
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 600;
  transition: 0.3s;
  border: none;
}

.profile-photo-upload-btn:hover {
  background: var(--color-primary-dark);
  transform: translateY(-2px);
}

.profile-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 30px;
  margin-bottom: 30px;
}

.stat-card {
  background: var(--bg-card);
  padding: 25px;
  border-radius: 12px;
  text-align: center;
  border: 2px solid rgba(30, 136, 229, 0.2);
  transition: 0.3s;
}

.stat-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 6px 20px rgba(30, 136, 229, 0.2);
}

.stat-icon {
  font-size: 2.5rem;
  margin-bottom: 10px;
}

.stat-value {
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 5px;
}

.stat-label {
  font-size: 0.9rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.scores-history {
  margin-top: 20px;
  max-height: 400px;
  overflow-y: auto;
}

.score-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px 20px;
  background: var(--bg-card);
  border-radius: 8px;
  margin-bottom: 10px;
  transition: 0.3s;
}

.score-item:hover {
  background: rgba(30, 136, 229, 0.1);
  transform: translateX(5px);
}

.score-date {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.score-result {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--color-primary);
}

/* ====================================
   SCROLLBAR STYLING
   ==================================== */
.feedback-zone::-webkit-scrollbar,
.question-text::-webkit-scrollbar {
  width: 10px;
}

.feedback-zone::-webkit-scrollbar-track,
.question-text::-webkit-scrollbar-track {
  background: var(--bg-secondary);
  border-radius: 5px;
}

.feedback-zone::-webkit-scrollbar-thumb,
.question-text::-webkit-scrollbar-thumb {
  background: var(--color-primary);
  border-radius: 5px;
}

.feedback-zone::-webkit-scrollbar-thumb:hover,
.question-text::-webkit-scrollbar-thumb:hover {
  background: var(--color-primary-dark);
}

/* Pour Firefox */
.feedback-zone,
.question-text {
  scrollbar-width: thin;
  scrollbar-color: var(--color-primary) var(--bg-secondary);
}

/* Scrollbar plus visible pour les corrections */
.feedback-zone.correct::-webkit-scrollbar-thumb {
  background: var(--color-success);
}

.feedback-zone.correct::-webkit-scrollbar-thumb:hover {
  background: #388e3c;
}

.feedback-zone.incorrect::-webkit-scrollbar-thumb {
  background: var(--color-error);
}

.feedback-zone.incorrect::-webkit-scrollbar-thumb:hover {
  background: #c62828;
}

/* ====================================
   QUIZ COMMUN (tous écrans)
   ==================================== */
.quiz-progress-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--color-primary), var(--color-primary-light));
  width: 0%;
  transition: width 0.5s ease;
  position: relative;
  border-radius: 3px;
}

.quiz-progress-bar::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  right: 0;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
  animation: shimmer 2s infinite;
}

@keyframes shimmer {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  10%, 30%, 50%, 70%, 90% { transform: translateX(-10px); }
  20%, 40%, 60%, 80% { transform: translateX(10px); }
}

.shake {
  animation: shake 0.5s;
}

.answer-zone input {
  padding: 12px;
  font-size: 1.1rem;
  width: 220px;
  border: 2px solid var(--color-primary);
  border-radius: 8px;
  text-align: center;
  transition: 0.3s;
  background: var(--bg-secondary);
  color: var(--text-primary);
}

.answer-zone input:focus {
  outline: none;
  border-color: var(--color-primary-dark);
  box-shadow: 0 0 8px rgba(30, 136, 229, 0.3);
}

.answer-zone button {
  background-color: var(--color-primary);
  color: white;
  border: none;
  padding: 12px 24px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 1rem;
  font-weight: 600;
  transition: 0.3s;
}

.answer-zone button:hover {
  background-color: var(--color-primary-dark);
  transform: translateY(-2px);
}

.answer-zone button:disabled {
  background-color: #ccc;
  cursor: not-allowed;
  transform: none;
}

.math-key {
  padding: 8px 12px;
  background: var(--bg-card);
  border: 2px solid var(--color-primary);
  border-radius: 6px;
  font-size: 1.1rem;
  cursor: pointer;
  transition: 0.2s;
  min-width: 40px;
  font-weight: 600;
  color: var(--color-primary);
}

.math-key:hover {
  background: var(--color-primary);
  color: white;
  transform: translateY(-2px);
}

.feedback-zone.correct {
  border-left: 6px solid var(--color-success);
  color: #2e7d32;
  background: rgba(76, 175, 80, 0.1);
}

.feedback-zone.incorrect {
  border-left: 6px solid var(--color-error);
  color: #c62828;
  background: rgba(229, 57, 53, 0.1);
}

.result {
  text-align: center;
  margin-top: 20px;
}

.result h2 {
  color: var(--color-primary);
  font-size: 2rem;
  margin-bottom: 20px;
}

.result button {
  margin: 10px 8px;
  padding: 14px 28px;
  background: var(--color-primary);
  color: white;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  font-size: 1.05rem;
  font-weight: 600;
  transition: 0.3s;
}

.result button:hover {
  background: var(--color-primary-dark);
  transform: translateY(-2px);
}

#save-score-btn {
  background: var(--color-success);
}

#save-score-btn:hover {
  background: #388e3c;
}

#confetti-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 9999;
}

/* STREAK CARD */
.streak-card {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  padding: 20px;
  border-radius: 12px;
  box-shadow: 0 4px 12px rgba(30, 136, 229, 0.3);
  color: white;
  animation: streakGlow 2s ease-in-out infinite;
}

@keyframes streakGlow {
  0%, 100% { box-shadow: 0 4px 12px rgba(30, 136, 229, 0.3); }
  50% { box-shadow: 0 6px 20px rgba(30, 136, 229, 0.5); }
}

.streak-header {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-bottom: 15px;
}

.streak-icon {
  font-size: 2rem;
  animation: flameFlicker 1.5s ease-in-out infinite;
}

@keyframes flameFlicker {
  0%, 100% { transform: scale(1) rotate(-5deg); }
  50% { transform: scale(1.1) rotate(5deg); }
}

.streak-header h3 {
  margin: 0;
  font-size: 1.3rem;
  color: white;
  font-weight: 700;
}

.streak-stats {
  display: flex;
  justify-content: space-around;
  align-items: center;
  gap: 15px;
  margin-bottom: 15px;
}

.streak-item {
  flex: 1;
  text-align: center;
}

.streak-number {
  font-size: 2.5rem;
  font-weight: 700;
  color: white;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
  transition: transform 0.3s ease;
}

.streak-number.pulse {
  animation: streakPulse 0.5s ease;
}

@keyframes streakPulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.3); }
}

.streak-label {
  font-size: 0.75rem;
  color: rgba(255, 255, 255, 0.9);
  margin-top: 5px;
  font-weight: 500;
}

.streak-divider {
  width: 2px;
  height: 50px;
  background: rgba(255, 255, 255, 0.3);
}

.streak-best {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 10px;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 8px;
  font-size: 0.85rem;
}

.streak-record-line {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 5px;
}

.streak-record-line strong {
  font-size: 1.1rem;
  font-weight: 700;
}

/* LEADERBOARD */
.leaderboard-card h3, .badges-card h3 {
  margin: 0 0 15px 0;
  color: var(--color-primary);
  font-size: 1.2rem;
  text-align: center;
}

.leaderboard-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.leaderboard-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px;
  background: var(--bg-card);
  border-radius: 8px;
  transition: 0.3s;
}

.leaderboard-item:hover {
  background: rgba(30, 136, 229, 0.1);
  transform: translateX(5px);
}

.leaderboard-rank {
  font-size: 1.2rem;
  font-weight: 700;
  min-width: 30px;
  text-align: center;
}

.leaderboard-rank.gold { color: #FFD700; }
.leaderboard-rank.silver { color: #C0C0C0; }
.leaderboard-rank.bronze { color: #CD7F32; }

.leaderboard-info {
  flex: 1;
}

.leaderboard-name {
  font-weight: 600;
  color: var(--text-primary);
  font-size: 0.9rem;
}

.leaderboard-score {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.leaderboard-time {
  font-size: 0.75rem;
  color: var(--text-secondary);
  margin-top: 2px;
}

/* BADGES */
.badges-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-top: 10px;
}

.badge-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 10px;
  background: var(--bg-card);
  border-radius: 10px;
  transition: all 0.3s ease;
  cursor: pointer;
  position: relative;
}

.badge-item:hover {
  transform: translateY(-3px);
  box-shadow: 0 4px 15px var(--shadow-hover);
}

.badge-icon {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  transition: all 0.3s ease;
  position: relative;
}

.badge-item.locked .badge-icon {
  background: var(--badge-locked);
  filter: grayscale(100%);
  opacity: 0.5;
}

.badge-item.unlocked .badge-icon {
  animation: badgeUnlock 0.5s ease;
}

@keyframes badgeUnlock {
  0% { transform: scale(0) rotate(0deg); }
  50% { transform: scale(1.2) rotate(180deg); }
  100% { transform: scale(1) rotate(360deg); }
}

.badge-lock-overlay {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 1.5rem;
  color: white;
}

.badge-name {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-primary);
  text-align: center;
}

.badge-description {
  font-size: 0.7rem;
  color: var(--text-secondary);
  text-align: center;
  line-height: 1.2;
}

/* BADGE POPUP */
.badge-popup-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.7);
  z-index: 9999;
  animation: fadeIn 0.3s ease;
}

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

.badge-popup {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0);
  background: var(--bg-secondary);
  padding: 40px;
  border-radius: 16px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
  z-index: 10000;
  text-align: center;
  animation: popupShow 0.5s ease forwards;
}

@keyframes popupShow {
  0% { transform: translate(-50%, -50%) scale(0) rotate(-180deg); opacity: 0; }
  100% { transform: translate(-50%, -50%) scale(1) rotate(0deg); opacity: 1; }
}

.badge-popup-icon {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  margin: 0 auto 20px auto;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 4rem;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  animation: badgePulse 1s ease infinite;
}

@keyframes badgePulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.1); }
}

.badge-popup h2 {
  color: var(--color-primary);
  margin: 0 0 10px 0;
  font-size: 1.8rem;
}

.badge-popup p {
  color: var(--text-secondary);
  margin: 0 0 20px 0;
  font-size: 1.1rem;
}

.badge-popup-close {
  padding: 12px 28px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  color: white;
  border: none;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: 0.3s;
}

.badge-popup-close:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(30, 136, 229, 0.4);
}

footer {
  margin-top: 20px;
  padding: 20px;
  text-align: center;
  color: var(--text-secondary);
  background: var(--bg-card);
  font-size: 0.9rem;
}

#result {
  flex: 1;
  padding: 20px;
}

/* ====================================
   DESKTOP - VERSION RESPONSIVE OPTIMISÉE
   ==================================== */
@media (min-width: 1025px) {
  /* Body sans scroll vertical */
  body {
    height: 100vh;
    overflow: hidden;
  }

  /* QUIZ LAYOUT - Hauteur flexible basée sur vh */
  .quiz-layout {
    display: flex;
    align-items: stretch;
    gap: 15px;
    max-width: 100%;
    height: calc(100vh - 70px); /* 70px = hauteur du header */
    min-height: 600px; /* Hauteur minimale pour éviter l'écrasement */
    padding: 10px 15px;
    overflow: hidden;
  }

  .quiz-main {
    flex: 1;
    background: var(--bg-secondary);
    padding: 15px;
    border-radius: 12px;
    box-shadow: 0 4px 12px var(--shadow);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    height: 100%;
    min-height: 0; /* Important pour le flex */
  }

  /* SIDEBAR - Largeur fixe, hauteur flexible */
  .sidebar {
    width: 280px;
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    gap: 15px;
    overflow-y: auto;
    height: 100%;
    max-height: 100%;
  }

  .streak-card {
    flex-shrink: 0;
    min-height: fit-content;
  }

  .leaderboard-card {
    background: var(--bg-secondary);
    padding: 15px;
    border-radius: 12px;
    box-shadow: 0 4px 12px var(--shadow);
    flex: 0 0 auto;
    max-height: 30vh; /* 30% de la hauteur viewport */
    min-height: 150px;
    overflow-y: auto;
  }

  .badges-card {
    background: var(--bg-secondary);
    padding: 15px;
    border-radius: 12px;
    box-shadow: 0 4px 12px var(--shadow);
    flex: 1;
    min-height: 200px;
    max-height: 50vh; /* 50% de la hauteur viewport */
    overflow-y: auto;
  }

  /* QUIZ CONTAINER - Flex vertical */
  .quiz-container {
    display: flex;
    flex-direction: column;
    height: 100%;
    overflow: hidden;
    min-height: 0;
  }

  /* QUESTION ZONE - Hauteur flexible principale */
  .question-zone {
    display: flex;
    align-items: flex-start;
    gap: 15px;
    flex: 1; /* Prend tout l'espace disponible */
    min-height: 200px; /* Minimum pour lisibilité */
    max-height: 60%; /* Maximum 60% pour ne pas écraser le feedback */
    overflow: hidden;
    margin-bottom: 15px;
  }

  .question-text {
    flex: 1;
    min-width: 0;
    font-size: 1rem;
    line-height: 1.6;
    text-align: left;
    padding: 15px;
    background: var(--bg-card);
    border-radius: 10px;
    display: flex;
    align-items: flex-start;
    overflow-y: auto;
    overflow-x: hidden;
    position: relative;
    z-index: 1;
    color: var(--text-primary);
    height: 100%; /* Prend toute la hauteur du parent */
    max-height: 100%;
    word-wrap: break-word;
    overflow-wrap: break-word;
    white-space: normal;
    margin: 0; /* Remove fixed margins */
  }

  /* IMAGE - Dimensions responsives */
  .question-image {
    width: auto;
    height: 100%;
    max-width: 300px; /* Largeur maximale augmentée */
    max-height: 100%;
    object-fit: contain;
    border-radius: 10px;
    box-shadow: 0 2px 8px var(--shadow-hover);
    background: var(--bg-secondary);
    flex-shrink: 0;
    padding: 10px;
  }

  /* ANSWER ZONE - Hauteur fixe acceptable */
  .answer-zone {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 12px;
    margin: 15px 0 10px 0;
    flex-shrink: 0;
    min-height: 50px;
  }

  /* MATH KEYBOARD - Hauteur fixe acceptable */
  .math-keyboard {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 6px;
    margin: 10px auto;
    max-width: 500px;
    flex-shrink: 0;
    min-height: fit-content;
  }

  /* FEEDBACK ZONE - Hauteur flexible avec limites */
  .feedback-zone {
    text-align: left;
    font-size: 0.9rem;
    padding: 15px;
    border-radius: 10px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    line-height: 1.6;
    color: var(--text-primary);
    min-height: 100px; /* Minimum pour lisibilité */
    max-height: 200px; /* Maximum pour ne pas prendre trop de place */
    height: auto; /* Hauteur flexible */
    overflow-y: auto;
    flex-shrink: 0;
    flex-grow: 0;
  }

  /* PROGRESS BAR - Hauteur fixe */
  .quiz-progress-container {
    width: 100%;
    height: 5px;
    background: var(--bg-card);
    border-radius: 3px;
    margin: 10px 0 5px 0;
    overflow: hidden;
    flex-shrink: 0;
  }

  /* PROGRESS TEXT - Hauteur fixe */
  .progress {
    text-align: center;
    padding: 10px 0 5px 0;
    border-top: 2px solid var(--border-color);
    font-size: 0.95rem;
    color: var(--text-secondary);
    font-weight: 600;
    background: var(--bg-secondary);
    flex-shrink: 0;
  }

  /* NEXT BUTTON - Hauteur fixe */
  .next-question-btn {
    display: block;
    margin: 10px auto;
    padding: 12px 28px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    color: white;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    transition: all 0.3s ease;
    flex-shrink: 0;
    min-height: 44px;
  }
  
  .next-question-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(30, 136, 229, 0.4);
  }

  .next-question-btn:disabled {
    background: #ccc;
    cursor: not-allowed;
    transform: none;
  }
}

/* ====================================
   BREAKPOINTS ADDITIONNELS POUR DESKTOP
   ==================================== */

/* Petits écrans desktop (1024px - 1366px) */
@media (min-width: 1025px) and (max-width: 1366px) {
  .sidebar {
    width: 260px; /* Sidebar légèrement plus étroite */
  }

  .question-image {
    max-width: 250px; /* Image légèrement plus petite */
  }

  .quiz-layout {
    gap: 12px;
    padding: 8px 12px;
  }

  header h1 {
    font-size: 1.4rem;
  }
}

/* Très grands écrans (1920px+) */
@media (min-width: 1920px) {
  .quiz-layout {
    max-width: 1800px;
    margin: 0 auto;
  }

  .sidebar {
    width: 320px; /* Sidebar plus large */
  }

  .question-image {
    max-width: 350px; /* Image plus grande */
  }

  .question-text {
    font-size: 1.1rem; /* Texte légèrement plus grand */
  }

  .feedback-zone {
    font-size: 1rem;
  }
}

/* Écrans ultra-larges (2560px+) */
@media (min-width: 2560px) {
  .quiz-layout {
    max-width: 2200px;
  }

  .sidebar {
    width: 360px;
  }

  .question-image {
    max-width: 400px;
  }

  header h1 {
    font-size: 1.8rem;
  }
}

/* ====================================
   TABLETTE ET MOBILE
   ==================================== */
@media (max-width: 1024px) {
    
    .quiz-container.hidden {
    display: none !important;
  }
    
  .header-content {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
    width: 100%;
  }

  header h1 {
    font-size: 1.5rem;
    margin: 0;
    text-align: left;
  }

  /* Afficher le bouton burger */
  .burger-btn {
    display: flex;
    order: 2;
  }

  /* Cacher les boutons du header sauf burger */
  .header-right .header-btn:not(.burger-btn),
  .header-buttons .header-btn:not(.burger-btn) {
    display: none;
  }

  /* Cacher le bouton profil du header */
  .profile-menu-container {
    display: none;
  }

  /* Cacher le bouton thème et astuce du header sur mobile */
  .theme-toggle,
  .tip-btn {
    display: none !important;
  }

  /* S'assurer que header-right et header-buttons ne prennent pas toute la largeur */
  .header-right,
  .header-buttons {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
  }

/*
  .header-content {
    flex-direction: column;
    gap: 10px;
  }
*/

  .profile-btn-text {
    display: none;
  }
  
  .profile-btn {
    min-width: 40px;
    padding: 8px;
  }
  
  .profile-dropdown {
    right: 0;
    left: auto;
    transform: translateY(-10px);
    min-width: 160px;
  }
  
  .profile-menu-container:hover .profile-dropdown,
  .profile-dropdown:hover {
    transform: translateY(0);
  }

  /* HOME PAGE */
  .hero-section {
    padding: 35px 25px;
  }

  .hero-content h2 {
    font-size: 1.6rem;
  }

  .subtitle {
    font-size: 1rem;
  }

  .auth-buttons {
    flex-direction: column;
    gap: 12px;
  }

  .btn {
    width: 100%;
  }

  .features {
    gap: 20px;
  }

  /* PROFILE */
  .profile-stats {
    grid-template-columns: 1fr;
    gap: 15px;
  }

  /* QUIZ LAYOUT */
  .quiz-layout {
    display: flex;
    flex-direction: column;
    gap: 20px;
    padding: 20px;
  }

  .quiz-main {
    width: 100%;
    background: var(--bg-secondary);
    padding: 20px;
    border-radius: 12px;
    box-shadow: 0 4px 12px var(--shadow);
  }

  .sidebar {
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 20px;
  }

  .leaderboard-card, .badges-card {
    background: var(--bg-secondary);
    padding: 20px;
    border-radius: 12px;
    box-shadow: 0 4px 12px var(--shadow);
  }

  .streak-card {
    padding: 15px;
  }

  .streak-number {
    font-size: 2rem;
  }

  .streak-icon {
    font-size: 1.5rem;
  }

  /* QUIZ CONTAINER */
  .quiz-container {
    display: flex;
    flex-direction: column;
  }

  .question-zone {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
  }

  .question-text {
    flex:1;
    min-width:0;  
    font-size: 1rem;
    line-height: 1.6;
    text-align: left;
    padding: 15px;
    background: var(--bg-card);
    border-radius: 10px;
    min-height: 150px;
    color: var(--text-primary);
    /*width: 100%;*/
    word-wrap: break-word;
    overflow-wrap: break-word;
    white-space: normal;
    /*align-items: flex-start;*/
    overflow-y: auto;
    overflow-x: hidden;
  }

  .question-image {
    width: 100%;
    max-width: 280px;
    height: auto;
    max-height: 280px;
    object-fit: contain;
    border-radius: 10px;
    box-shadow: 0 2px 8px var(--shadow-hover);
    background: var(--bg-secondary);
    padding: 10px;
  }

  .answer-zone {
    display: flex;
    flex-direction: column;
    width: 100%;
    gap: 12px;
    margin: 20px 0px 0 0px;
    align-items: center;
  }

  .answer-zone input {
    width: 100%;
    max-width: 100%;
  }

  .answer-zone button {
    width: 100%;
    max-width: 100%;
  }

  .math-keyboard {
    gap: 8px;
    width: 100%;
    display: flex;
    justify-content: center;
    margin-top:8px;
  }

  .math-key {
    padding: 10px 15px;
    font-size: 1.2rem;
  }

  .feedback-zone {
    text-align: left;
    font-size: 0.95rem;
    margin: 20px 0;
    padding: 15px;
    border-radius: 10px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    line-height: 1.6;
    color: var(--text-primary);
    width: 100%;
    word-wrap: break-word;
    overflow-wrap: break-word;
  }

  .quiz-progress-container {
    width: 100%;
    height: 6px;
    background: var(--bg-card);
    border-radius: 3px;
    margin: 15px 0 10px 0;
    overflow: hidden;
  }

  .progress {
    text-align: center;
    padding: 12px 0 8px 0;
    border-top: 2px solid var(--border-color);
    font-size: 1rem;
    color: var(--text-secondary);
    font-weight: 600;
    background: var(--bg-secondary);
  }

  .next-question-btn {
    display: block;
    margin: 15px auto 30px auto;
    padding: 14px 32px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    color: white;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    transition: all 0.3s ease;
    width: 100%;
    max-width: 100%;
  }

  .next-question-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(30, 136, 229, 0.4);
  }

  .next-question-btn:disabled {
    background: #ccc;
    cursor: not-allowed;
    transform: none;
  }

  .badges-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }

  /* POPUP ZOOM */
  .zoom-tip-popup {
    max-width: 90%;
    padding: 25px 20px;
  }
  
  .zoom-shortcuts {
    gap: 8px;
  }
  
  .shortcut-item {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
}


/* ====================================
   MOBILE (≤768px)
   ==================================== */
@media (max-width: 768px) {
    
    .quiz-container.hidden {
    display: none !important;
  }

  .header-content {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
    width: 100%;
  }

  header h1 {
    font-size: 1.5rem;
    margin: 0;
    text-align: left;
  }

  /* Afficher le bouton burger */
  .burger-btn {
    display: flex;
    order: 2;
  }

  /* Cacher les boutons du header sauf burger */
  .header-right .header-btn:not(.burger-btn),
  .header-buttons .header-btn:not(.burger-btn) {
    display: none;
  }

  /* Cacher le bouton profil du header */
  .profile-menu-container {
    display: none;
  }

  /* Cacher le bouton thème et astuce du header sur mobile */
  .theme-toggle,
  .tip-btn {
    display: none !important;
  }

  /* S'assurer que header-right et header-buttons ne prennent pas toute la largeur */
  .header-right,
  .header-buttons {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
  }

/*
  .header-content {
    flex-direction: column;
    gap: 10px;
  }
*/

  .profile-btn-text {
    display: none;
  }
  
  .profile-btn {
    min-width: 40px;
    padding: 8px;
  }
  
  .profile-dropdown {
    right: 0;
    left: auto;
    transform: translateY(-10px);
    min-width: 160px;
  }
  
  .profile-menu-container:hover .profile-dropdown,
  .profile-dropdown:hover {
    transform: translateY(0);
  }

  /* HOME PAGE */
  .hero-section {
    padding: 35px 25px;
  }

  .hero-content h2 {
    font-size: 1.6rem;
  }

  .subtitle {
    font-size: 1rem;
  }

  .auth-buttons {
    flex-direction: column;
    gap: 12px;
  }

  .btn {
    width: 100%;
  }

  .features {
    gap: 20px;
  }

  /* PROFILE */
  .profile-stats {
    grid-template-columns: 1fr;
    gap: 15px;
  }

  /* QUIZ LAYOUT */
  .quiz-layout {
    display: flex;
    flex-direction: column;
    gap: 20px;
    padding: 20px;
  }

  .quiz-main {
    width: 100%;
    background: var(--bg-secondary);
    padding: 20px;
    border-radius: 12px;
    box-shadow: 0 4px 12px var(--shadow);
  }

  .sidebar {
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 20px;
  }

  .leaderboard-card, .badges-card {
    background: var(--bg-secondary);
    padding: 20px;
    border-radius: 12px;
    box-shadow: 0 4px 12px var(--shadow);
  }

  .streak-card {
    padding: 15px;
  }

  .streak-number {
    font-size: 2rem;
  }

  .streak-icon {
    font-size: 1.5rem;
  }

  /* QUIZ CONTAINER */
  .quiz-container {
    display: flex;
    flex-direction: column;
  }

  .question-zone {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
  }

  .question-text {
    flex:1;
    min-width:0;  
    font-size: 1rem;
    line-height: 1.6;
    text-align: left;
    padding: 15px;
    background: var(--bg-card);
    border-radius: 10px;
    min-height: 150px;
    color: var(--text-primary);
    /*width: 100%;*/
    word-wrap: break-word;
    overflow-wrap: break-word;
    white-space: normal;
    /*align-items: flex-start;*/
    overflow-y: auto;
    overflow-x: hidden;
  }

  .question-image {
    width: 100%;
    max-width: 280px;
    height: auto;
    max-height: 280px;
    object-fit: contain;
    border-radius: 10px;
    box-shadow: 0 2px 8px var(--shadow-hover);
    background: var(--bg-secondary);
    padding: 10px;
  }

  .answer-zone {
    display: flex;
    flex-direction: column;
    width: 100%;
    gap: 12px;
    margin: 20px 0px 0 0px;
    align-items: center;
  }

  .answer-zone input {
    width: 100%;
    max-width: 100%;
  }

  .answer-zone button {
    width: 100%;
    max-width: 100%;
  }

  .math-keyboard {
    gap: 8px;
    width: 100%;
    display: flex;
    justify-content: center;
    margin-top:8px;
  }

  .math-key {
    padding: 10px 15px;
    font-size: 1.2rem;
  }

  .feedback-zone {
    text-align: left;
    font-size: 0.95rem;
    margin: 20px 0;
    padding: 15px;
    border-radius: 10px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    line-height: 1.6;
    color: var(--text-primary);
    width: 100%;
    word-wrap: break-word;
    overflow-wrap: break-word;
  }

  .quiz-progress-container {
    width: 100%;
    height: 6px;
    background: var(--bg-card);
    border-radius: 3px;
    margin: 15px 0 10px 0;
    overflow: hidden;
  }

  .progress {
    text-align: center;
    padding: 12px 0 8px 0;
    border-top: 2px solid var(--border-color);
    font-size: 1rem;
    color: var(--text-secondary);
    font-weight: 600;
    background: var(--bg-secondary);
  }

  .next-question-btn {
    display: block;
    margin: 15px auto 30px auto;
    padding: 14px 32px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    color: white;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    transition: all 0.3s ease;
    width: 100%;
    max-width: 100%;
  }

  .next-question-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(30, 136, 229, 0.4);
  }

  .next-question-btn:disabled {
    background: #ccc;
    cursor: not-allowed;
    transform: none;
  }

  .badges-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }

  /* POPUP ZOOM */
  .zoom-tip-popup {
    max-width: 90%;
    padding: 25px 20px;
  }
  
  .zoom-shortcuts {
    gap: 8px;
  }
  
  .shortcut-item {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
}

/* ====================================
   PETIT MOBILE (≤480px)
   ==================================== */
@media (max-width: 480px) {
  header h1 {
    font-size: 1.1rem;
  }

  .hero-content h2 {
    font-size: 1.4rem;
  }

  .question-image {
    width: 220px;
    height: 220px;
  }

  .question-text {
    font-size: 1rem;
    min-height: 180px;
  }
}

/* ====================================
   MENU BURGER MOBILE
   ==================================== */

/* Bouton burger (visible uniquement sur mobile) */
.burger-btn {
  display: none;
  background: rgba(255, 255, 255, 0.2);
  border: none;
  color: white;
  padding: 8px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 1.3rem;
  transition: all 0.3s ease;
  height: 36px;
  width: 36px;
  align-items: center;
  justify-content: center;
}

.burger-btn:hover {
  background: rgba(255, 255, 255, 0.3);
}

/* Menu mobile overlay */
.mobile-menu-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.7);
  z-index: 9998;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.mobile-menu-overlay.active {
  display: block;
  opacity: 1;
}

/* Menu mobile */
.mobile-menu {
  display: none;
  position: fixed;
  top: 0;
  right: -280px;
  width: 280px;
  height: 100%;
  background: var(--bg-secondary);
  box-shadow: -4px 0 12px var(--shadow-hover);
  z-index: 9999;
  transition: right 0.3s ease;
  overflow-y: auto;
}

.mobile-menu.active {
  display: block;
  right: 0;
}

.mobile-menu-header {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  color: white;
  padding: 20px;
  display: flex;
  justify-content: space-between;
  align-items: header-right;
 /* align-items: center; */
}

.mobile-menu-title {
  font-size: 1.2rem;
  font-weight: 700;
  margin: 0;
}

.mobile-menu-close {
  background: rgba(255, 255, 255, 0.2);
  border: none;
  color: white;
  width: 32px;
  height: 32px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 1.2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: 0.3s;
}

.mobile-menu-close:hover {
  background: rgba(255, 255, 255, 0.3);
}

.mobile-menu-content {
  padding: 20px;
}

.mobile-menu-section {
  margin-bottom: 25px;
}

.mobile-menu-section-title {
  color: var(--text-secondary);
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 10px;
}

.mobile-menu-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 15px;
  color: var(--text-primary);
  text-decoration: none;
  border-radius: 8px;
  margin-bottom: 8px;
  transition: all 0.2s ease;
  font-size: 0.95rem;
}

.mobile-menu-link:hover,
.mobile-menu-link:active {
  background: rgba(30, 136, 229, 0.1);
  color: var(--color-primary);
}

.mobile-menu-link .btn-icon {
  font-size: 1.2rem;
}

.mobile-menu-divider {
  height: 1px;
  background: var(--border-color);
  margin: 20px 0;
}

.mobile-menu-user {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 15px;
  background: var(--bg-card);
  border-radius: 8px;
  margin-bottom: 20px;
}

.mobile-menu-user-photo {
  width: 40px;
  height: 40px;
  border-radius: 8px;
  overflow: hidden;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: white;
  flex-shrink: 0;
}

.mobile-menu-user-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.mobile-menu-user-info {
  flex: 1;
}

.mobile-menu-username {
  font-weight: 600;
  color: var(--text-primary);
  font-size: 0.95rem;
  margin-bottom: 2px;
}

.mobile-menu-user-status {
  font-size: 0.75rem;
  color: var(--text-secondary);
}

/* Afficher le burger uniquement sur mobile */
@media (max-width: 1024px) {
  .burger-btn {
    display: flex;
  }

  /* Cacher les boutons du header sauf burger, theme et tip */
  .header-right .header-btn:not(.burger-btn),
  .header-buttons .header-btn:not(.burger-btn) {
    display: none;
  }

  /* Cacher le bouton profil du header (il sera dans le burger) */
  .profile-menu-container {
    display: none;
  }
}

/* Sur très petit mobile, menu en pleine largeur */
@media (max-width: 480px) {
  .mobile-menu {
    width: 100%;
    right: -100%;
  }
}

#mobile-theme-toggle {
  background: transparent;   /* rend le fond transparent */
  border: none;              /* supprime la bordure */
  box-shadow: none;          /* au cas où une ombre existe */
}