:root {
  /* Polices */
  --font-family-sans: -apple-system, BlinkMacSystemFont, "Inter", "Segoe UI", "Roboto", "Oxygen", "Ubuntu", "Cantarell", "Fira Sans", "Droid Sans", "Helvetica Neue", sans-serif;

  /* Couleurs (Mode Clair par défaut) */
  --color-primary: #007AFF; /* Bleu vif (style Apple) */
  --color-primary-light: #e6f2ff;
  --color-secondary: #7A5CFF; /* Violet doux */
  --color-success: #34C759;
  --color-warning: #FF9500;
  --color-danger: #FF3B30;

  --color-bg-app: #f4f7fa; /* Fond général de l'application */
  --color-bg-card: #ffffff; /* Fond des cartes et éléments */
  --color-border: #e2e8f0;

  --text-primary: #1a202c;
  --text-secondary: #5A657D;
  --text-on-primary: #ffffff;

  /* Tailles & Ombres */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 12px 0 rgba(26, 32, 44, 0.06);
  --transition: all 0.2s ease-in-out;
}

/* ---------------------------------- */
/* 2. Réinitialisation & Styles de Base
/* ---------------------------------- */

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

body {
  font-family: var(--font-family-sans);
  background-color: var(--color-bg-app);
  color: var(--text-primary);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ---------------------------------- */
/* 3. Structure Principale
/* ---------------------------------- */

.container {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* --- En-tête (Header) --- */
.header {
  background: var(--color-bg-card);
  color: var(--text-primary);
  padding: 16px 30px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--color-border);
}

.logo {
  font-size: 1.6em;
  font-weight: 700;
  color: var(--color-primary);
}

.user-info {
  display: flex;
  align-items: center;
  gap: 15px;
  font-weight: 500;
  color: var(--text-secondary);
}
.user-info i {
  color: var(--color-primary);
}

/* --- Navigation Principale (PC) --- */
.nav {
  background: var(--color-bg-card);
  border-bottom: 1px solid var(--color-border);
}

.nav-list {
  display: flex;
  list-style: none;
}

.nav-item {
  flex: 1;
}

.nav-link {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 16px 20px;
  text-decoration: none;
  color: var(--text-secondary);
  text-align: center;
  font-weight: 600;
  font-size: 0.95em;
  transition: var(--transition);
  border-bottom: 3px solid transparent;
}

.nav-link:hover {
  color: var(--color-primary);
}

.nav-link.active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

/* --- Contenu Principal --- */
.main-content {
  flex: 1;
  padding: 30px;
}

.page {
  display: none;
}

.page.active {
  display: block;
}

/* ---------------------------------- */
/* 4. Cartes (Cards) & Grilles
/* ---------------------------------- */

.card {
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin-bottom: 24px;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--color-border);
}

.card-header {
  display: flex;
  align-items: center;
  margin-bottom: 20px;
  gap: 12px;
}

.card-icon {
  font-size: 1.2em;
  color: var(--color-primary);
  background-color: var(--color-primary-light);
  border-radius: var(--radius-md);
  padding: 10px;
  line-height: 1;
}

.card-title {
  font-size: 1.4em;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0;
}

/* --- Grille de Statistiques (Dashboard) --- */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
  margin-bottom: 30px;
}

.stat-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  color: var(--text-primary);
  padding: 20px;
  border-radius: var(--radius-lg);
  text-align: left;
  transition: var(--transition);
}

.stat-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.stat-number {
  font-size: 2.2em;
  font-weight: 700;
  margin-bottom: 4px;
  line-height: 1.2;
}

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

/* Cartes spéciales de crédit (elles gardent leurs couleurs) */
.stat-card.stat-card-credit {
  background: linear-gradient(135deg, #007AFF, #0056B3);
  color: white;
  border: none;
}
.stat-card.stat-card-days {
  background: linear-gradient(135deg, #667eea, #764ba2);
  color: white;
  border: none;
  transition: background 0.5s ease;
}
.stat-card.stat-card-credit .stat-label,
.stat-card.stat-card-days .stat-label {
  color: rgba(255, 255, 255, 0.85);
}


/* ---------------------------------- */
/* 5. Éléments de Formulaire
/* ---------------------------------- */

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 30px;
  margin-bottom: 24px; /* Ajout d'un margin-bottom pour espacer la nouvelle carte */
}

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

.form-group label {
  display: block;
  margin-bottom: 8px;
  font-weight: 600;
  font-size: 0.9em;
  color: var(--text-secondary);
}

.form-group input, .form-group select {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--color-border);
  background-color: var(--color-bg-app);
  border-radius: var(--radius-md);
  font-size: 16px; /* Empêche le zoom iOS */
  font-family: var(--font-family-sans);
  color: var(--text-primary);
  transition: var(--transition);
}

.form-group input:focus, .form-group select:focus {
  outline: none;
  border-color: var(--color-primary);
  background-color: var(--color-bg-card);
  box-shadow: 0 0 0 3px var(--color-primary-light);
}

.form-group small {
  font-size: 0.85em;
  color: var(--text-secondary);
  margin-top: 6px;
  display: block;
}

/* --- Boutons --- */
.btn {
  background: var(--color-primary);
  color: var(--text-on-primary);
  padding: 12px 24px;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  font-size: 16px;
  font-weight: 600;
  transition: var(--transition);
  display: inline-block;
  text-decoration: none;
  text-align: center;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 12px rgba(0, 122, 255, 0.2);
}

.btn.btn-large {
  padding: 16px 30px;
  font-size: 17px;
  width: 100%;
  margin-bottom: 15px;
}

/* ---------------------------------- */
/* 6. Tableaux de Données
/* ---------------------------------- */

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

.data-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 20px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden; /* Pour les coins arrondis */
}

.data-table th,
.data-table td {
  padding: 14px 16px;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
}

.data-table th {
  background: var(--color-bg-app);
  font-weight: 600;
  font-size: 0.85em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

.data-table td {
  color: var(--text-primary);
  font-weight: 500;
}

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

.data-table tr:hover {
  background: var(--color-bg-app);
}

/* Bouton supprimer dans le tableau */
.data-table .btn-danger {
  background-color: var(--color-danger);
  padding: 6px 12px;
  font-size: 14px;
  box-shadow: none;
}
.data-table .btn-danger:hover {
  background-color: #d90429;
  transform: none;
  box-shadow: none;
}


/* ---------------------------------- */
/* 7. Composants & Aides
/* ---------------------------------- */

/* --- Chart --- */
.chart-container {
  position: relative;
  height: 300px;
  padding: 10px;
  background-color: var(--color-bg-app);
  border-radius: var(--radius-md);
}

/* --- Alertes --- */
.alert {
  padding: 16px;
  border-radius: var(--radius-md);
  margin-bottom: 20px;
  border: 1px solid transparent;
  font-weight: 500;
}
.alert-info {
  background: rgba(0, 122, 255, 0.1);
  border-color: rgba(0, 122, 255, 0.2);
  color: #0056B3;
}
.alert-warning {
  background: rgba(255, 149, 0, 0.1);
  border-color: rgba(255, 149, 0, 0.2);
  color: #c27200;
}
.alert-success {
  background: rgba(52, 199, 89, 0.1);
  border-color: rgba(52, 199, 89, 0.2);
  color: #1e7b3a;
}
.alert-error {
  background: rgba(255, 59, 48, 0.1);
  border-color: rgba(255, 59, 48, 0.2);
  color: #c70f0f;
}

/* Couleurs d'alertes en mode sombre */
@media (prefers-color-scheme: dark) {
  .alert-info { color: #50a5ff; }
  .alert-warning { color: #ffca69; }
  .alert-success { color: #6ff79a; }
  .alert-error { color: #ff8f8a; }
}


/* --- Textes d'aide & Étapes --- */
.help-text, .example-box {
  padding: 16px;
  border-radius: var(--radius-md);
  margin: 15px 0;
  font-size: 0.95em;
  line-height: 1.5;
}
.help-text {
  background-color: var(--color-bg-app);
  border: 1px dashed var(--color-border);
  color: var(--text-secondary);
}
.example-box {
  background-color: var(--color-primary-light);
  border: 1px solid var(--color-primary-light);
  color: var(--text-primary);
}
.steps-list {
  padding-left: 20px;
  margin: 15px 0;
  color: var(--text-secondary);
}
.steps-list li {
  margin-bottom: 10px;
}

/* --- Actions Rapides (Dashboard & Paramètres) --- */
.quick-actions {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
  margin-top: 30px;
}

.quick-action {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  text-align: center;
  text-decoration: none;
  color: var(--text-primary);
  font-weight: 600;
  transition: var(--transition);
}

.quick-action:hover {
  border-color: var(--color-primary);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  color: var(--color-primary);
}

.quick-action-icon {
  font-size: 2.2em;
  margin-bottom: 12px;
  color: var(--color-primary);
}
.quick-action:hover .quick-action-icon {
  transform: scale(1.1);
}

/* --- Codes de Référence --- */
.code-reference {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 15px;
  margin-top: 20px;
}
.code-item {
  background: var(--color-bg-app);
  padding: 15px;
  border-radius: var(--radius-md);
}
.code-number {
  font-weight: 700;
  font-size: 1.3em;
  color: var(--color-primary);
  margin-bottom: 5px;
}
.code-description {
  color: var(--text-secondary);
  font-size: 0.9em;
}

/* --- Niveaux d'Alerte Compteur --- */
.alert-levels {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 20px;
}
.alert-level {
  padding: 14px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  gap: 15px;
  border: 2px solid transparent;
}
.alert-level .indicator {
  font-weight: 700;
  min-width: 120px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.alert-level.green {
  background-color: rgba(52, 199, 89, 0.1);
  border-color: var(--color-success);
  color: var(--color-success);
}
.alert-level.orange {
  background-color: rgba(255, 149, 0, 0.1);
  border-color: var(--color-warning);
  color: var(--color-warning);
}
.alert-level.red {
  background-color: rgba(255, 59, 48, 0.1);
  border-color: var(--color-danger);
  color: var(--color-danger);
}
.alert-level.emergency {
  background-color: rgba(255, 59, 48, 0.2);
  border-color: var(--color-danger);
  color: var(--color-danger);
  font-weight: 700;
}


/* =================================================================
   8. RESPONSIVE DESIGN (Mobile-First)
   ================================================================= */

/* --- Tablette (Points de rupture larges) --- */
@media (max-width: 992px) {
  .main-content {
    padding: 20px;
  }
  .form-grid {
    grid-template-columns: 1fr;
  }
  .stats-grid {
    /* 2 colonnes sur tablette */
    grid-template-columns: 1fr 1fr;
  }
}

/* --- Mobile (Points de rupture petits) --- */
@media (max-width: 768px) {

  /* Ajoute un padding en bas pour la nouvelle nav-bar */
  body {
    padding-bottom: 80px;
  }

  .container {
    width: 100%;
    min-width: 320px;
  }

  .main-content {
    padding: 16px;
  }

  .card {
    padding: 16px;
  }
  .card-title {
    font-size: 1.25em;
  }

  /* --- En-tête (Header) Mobile --- */
  .header {
    flex-direction: column;
    padding: 16px;
    gap: 8px;
  }
  .user-info {
    font-size: 0.9em;
  }

  /* --- NOUVELLE Barre de Navigation Mobile (en bas) --- */
  .nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    border-top: 1px solid var(--color-border);
    border-bottom: none;
    z-index: 1000;
  }
  .nav-list {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
  }
  .nav-link {
    flex-direction: column;
    padding: 10px 5px;
    font-size: 0.75em; /* Texte plus petit */
    font-weight: 500;
    gap: 4px;
    border-bottom: none; /* On enlève la bordure du bas */
    border-radius: var(--radius-md);
  }
  .nav-link i {
    font-size: 1.4em;
    line-height: 1;
  }
  .nav-link.active {
    /* Style "Pill" (pilule) pour l'onglet actif */
    background: var(--color-primary-light);
    color: var(--color-primary);
  }
  .nav-link:hover {
    background: var(--color-bg-app);
  }
  /* --- Fin de la nouvelle nav --- */


  /* --- Grilles en 1 colonne --- */
  .stats-grid,
  .form-grid,
  .quick-actions {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .stat-number {
    font-size: 2em;
  }

  /* Grille de sauvegarde en 2x2 (comme demandé) */
  .data-actions-grid {
    grid-template-columns: 1fr 1fr;
    gap: 12px;
  }
  .data-actions-grid .quick-action {
    padding: 16px 10px;
    font-size: 0.85em;
  }
  .data-actions-grid .quick-action-icon {
    font-size: 1.8em;
  }

  /* Alertes Niveaux */
  .alert-levels {
    flex-direction: column;
  }
  .alert-level {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  /* --- Tableau Responsive (Style "data-label") --- */
  .data-table {
    border: none;
    border-radius: 0;
    box-shadow: none;
  }
  .data-table thead {
    display: none; /* Cache les en-têtes */
  }
  .data-table tr {
    display: block;
    margin-bottom: 16px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    overflow: hidden; /* Pour les coins */
  }
  .data-table td {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 16px;
    text-align: right;
    font-weight: 600;
  }
  .data-table td:last-child {
    border-bottom: none;
  }

  /* Création des "labels" avant le contenu */
  .data-table td::before {
    content: attr(data-label);
    font-weight: 500;
    margin-right: 15px;
    text-align: left;
    color: var(--text-secondary);
  }

  /* Ajustement pour le bouton "Actions" */
  .data-table td[data-label="Actions"] {
    background-color: var(--color-bg-app);
  }
  .data-table td[data-label="Actions"]::before {
    display: none; /* Pas besoin de label pour le bouton */
  }

}


/* =================================================================
   9. STYLES POUR LE SÉLECTEUR DE THÈME (Ajout)
   ================================================================= */

/* --- Conteneur des boutons --- */
.theme-switcher {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  background-color: var(--color-bg-app);
  padding: 8px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
}

.theme-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 16px 10px;
  border: none;
  border-radius: var(--radius-sm);
  background-color: transparent;
  color: var(--text-secondary);
  font-family: var(--font-family-sans);
  font-size: 0.9em;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}

.theme-btn i {
  font-size: 1.6em;
}

.theme-btn:hover {
  background-color: var(--color-bg-card);
  color: var(--text-primary);
}

.theme-btn.active {
  background-color: var(--color-bg-card);
  color: var(--color-primary);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
}

/* --- Classes pour Forcer le Thème --- */

/* 1. Forcer le Thème CLAIR */
html.theme-light {
  /* Variables du mode clair (copiées de :root) */
  --color-primary: #007AFF;
  --color-primary-light: #e6f2ff;
  --color-secondary: #7A5CFF;
  --color-success: #34C759;
  --color-warning: #FF9500;
  --color-danger: #FF3B30;
  --color-bg-app: #f4f7fa;
  --color-bg-card: #ffffff;
  --color-border: #e2e8f0;
  --text-primary: #1a202c;
  --text-secondary: #5A657D;
  --text-on-primary: #ffffff;
}

/* 2. Forcer le Thème SOMBRE */
html.theme-dark {
  /* Variables du mode sombre (copiées de @media) */
  --color-primary: #0A84FF;
  --color-primary-light: rgba(10, 132, 255, 0.2);
  --color-secondary: #8E78FF;
  --color-success: #30D158;
  --color-warning: #FF9F0A;
  --color-danger: #FF453A;
  --color-bg-app: #000000;
  --color-bg-card: #1c1c1e;
  --color-border: #38383a;
  --text-primary: #f2f2f7;
  --text-secondary: #8e8e93;
  --text-on-primary: #ffffff;
}

/* 3. Ajuster la règle @media pour respecter le choix manuel */
@media (prefers-color-scheme: dark) {
  /* NE s'applique PAS si theme-light est forcé */
  :root:not(.theme-light) {
    --color-primary: #0A84FF;
    --color-primary-light: rgba(10, 132, 255, 0.2);
    --color-secondary: #8E78FF;
    --color-success: #30D158;
    --color-warning: #FF9F0A;
    --color-danger: #FF453A;
    --color-bg-app: #000000;
    --color-bg-card: #1c1c1e;
    --color-border: #38383a;
    --text-primary: #f2f2f7;
    --text-secondary: #8e8e93;
    --text-on-primary: #ffffff;
  }
}

/* =================================================================
   10. STYLES POUR L'OBJECTIF MENSUEL (Ajout)
   ================================================================= */

.goal-tracker {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.goal-info {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  font-weight: 600;
}

#goalProgressText {
  font-size: 1.1em;
  color: var(--text-primary);
}

#goalPercentage {
  font-size: 1em;
  color: var(--color-primary);
  background-color: var(--color-primary-light);
  padding: 4px 8px;
  border-radius: var(--radius-sm);
}

.progress-bar-container {
  width: 100%;
  height: 12px;
  background-color: var(--color-bg-app);
  border-radius: 6px;
  overflow: hidden;
  border: 1px solid var(--color-border);
}

.progress-bar {
  height: 100%;
  background-color: var(--color-success); /* Couleur par défaut */
  border-radius: 6px;
  transition: width 0.5s ease-out, background-color 0.5s ease; /* Animation fluide */
}

.goal-status {
  text-align: center;
  font-size: 0.9em;
  font-weight: 500;
  color: var(--text-secondary);
  margin-top: 4px;
}

/* =================================================================
   11. STYLES POUR SUIVI TRANCHE & PRÉVISION (Ajout)
   ================================================================= */

/* Style pour la carte Prévision Recharge */
.card-prediction {
  background: var(--color-secondary); /* Utilise la couleur secondaire */
  color: var(--text-on-primary);
  border: none;
}

.card-prediction .card-header .card-icon {
  background-color: rgba(255, 255, 255, 0.2);
  color: white;
}

.card-prediction .card-header .card-title {
  color: white;
}

.prediction-content {
  text-align: center;
  padding: 10px 0;
}

.prediction-icon {
    font-size: 2.5em;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 15px;
}

.prediction-content p {
  font-size: 1em;
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: 5px;
}

#rechargePredictionDate {
  font-size: 1.4em;
  font-weight: 700;
  color: white;
}

/* Ajustement pour le % de la tranche */
#tierPercentage {
   background-color: rgba(52, 199, 89, 0.1); /* Vert par défaut */
   color: var(--color-success);
   transition: background-color 0.5s ease, color 0.5s ease;
}

/* Ajustement pour mobile si nécessaire */
@media (max-width: 768px) {
    #rechargePredictionDate {
        font-size: 1.2em;
    }
}

/* =================================================================
   12. STYLES POUR LE TESTEUR DE PUISSANCE (Ajout)
   ================================================================= */

#powerResult h4 {
  margin-top: 0;
  margin-bottom: 15px;
  font-weight: 700;
  color: inherit; /* Garde la couleur de l'alerte (succès) */
}

#powerResult p {
  margin-bottom: 8px;
  line-height: 1.5;
}

#powerResult p:last-child {
  margin-bottom: 0;
}