/* ==========================================
   COMPOSANTS UI STANDARDISÉS
   Basé sur Practical UI Design System
   ========================================== */

/* ==========================================
   SYSTÈME DE BOUTONS
   ========================================== */

.btn {
  /* Base commune */
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-family: var(--font-family-primary);
  font-weight: var(--font-weight-medium);
  text-decoration: none;
  border: none;
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--transition-fast);
  position: relative;
  overflow: hidden;
  user-select: none;
  white-space: nowrap;
}

/* Tailles des boutons */
.btn--sm {
  height: 2rem; /* 32px */
  padding: 0 var(--space-3);
  font-size: var(--font-size-sm);
}

.btn--md {
  height: 2.5rem; /* 40px */
  padding: 0 var(--space-4);
  font-size: var(--font-size-base);
}

.btn--lg {
  height: 3rem; /* 48px */
  padding: 0 var(--space-6);
  font-size: var(--font-size-lg);
}

.btn--xl {
  height: 3.5rem; /* 56px */
  padding: 0 var(--space-8);
  font-size: var(--font-size-xl);
}

/* Variants de couleur */
.btn--primary {
  background-color: var(--color-primary-600);
  color: var(--color-text-inverse);
  box-shadow: var(--shadow-sm);
}

.btn--primary:hover {
  background-color: var(--color-primary-700);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.btn--secondary {
  background-color: var(--color-bg-secondary);
  color: var(--color-text-primary);
  border: 1px solid var(--color-border-primary);
}

.btn--secondary:hover {
  background-color: var(--color-bg-tertiary);
  border-color: var(--color-border-secondary);
}

.btn--accent {
  background-color: var(--color-accent-500);
  color: var(--color-text-inverse);
  box-shadow: var(--shadow-sm);
}

.btn--accent:hover {
  background-color: var(--color-accent-600);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.btn--gold {
  background-color: var(--color-gold-500);
  color: var(--color-neutral-900);
  box-shadow: var(--shadow-sm);
}

.btn--gold:hover {
  background-color: var(--color-gold-600);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.btn--ghost {
  background-color: transparent;
  color: var(--color-text-primary);
}

.btn--ghost:hover {
  background-color: var(--color-bg-secondary);
}

/* États des boutons */
.btn:focus {
  outline: none;
  box-shadow: 0 0 0 3px rgba(30, 57, 133, 0.12);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none !important;
}

.btn--loading {
  color: transparent;
  pointer-events: none;
}

.btn--loading::after {
  content: '';
  position: absolute;
  width: 1rem;
  height: 1rem;
  border: 2px solid transparent;
  border-top: 2px solid currentColor;
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ==========================================
   SYSTÈME DE CARTES
   ========================================== */

.card {
  background-color: var(--color-bg-elevated);
  border: 1px solid var(--color-border-primary);
  border-radius: var(--radius-xl);
  transition: all var(--transition-base);
  overflow: hidden;
}

/* Élévations de cartes */
.card--flat {
  box-shadow: none;
}

.card--raised {
  box-shadow: var(--shadow-sm);
}

.card--elevated {
  box-shadow: var(--shadow-md);
}

.card--floating {
  box-shadow: var(--shadow-lg);
}

/* États interactifs des cartes */
.card--interactive {
  cursor: pointer;
}

.card--interactive:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
  border-color: var(--color-border-secondary);
}

/* Parties de la carte */
.card__header {
  padding: var(--space-6);
  border-bottom: 1px solid var(--color-border-primary);
}

.card__body {
  padding: var(--space-6);
}

.card__footer {
  padding: var(--space-6);
  border-top: 1px solid var(--color-border-primary);
  background-color: var(--color-bg-secondary);
}

/* Mode sombre pour cartes */
[data-theme="dark"] .card,
body.m-dark .card {
  background-color: var(--elevation-1);
  border-color: var(--color-border-primary);
}

[data-theme="dark"] .card--raised,
body.m-dark .card--raised {
  background-color: var(--elevation-2);
}

[data-theme="dark"] .card--elevated,
body.m-dark .card--elevated {
  background-color: var(--elevation-3);
}

[data-theme="dark"] .card--floating,
body.m-dark .card--floating {
  background-color: var(--elevation-4);
}

/* ==========================================
   SYSTÈME DE FORMULAIRES
   ========================================== */

.form-group {
  margin-bottom: var(--space-4);
}

.form-label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-primary);
  margin-bottom: var(--space-2);
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: var(--space-3);
  font-size: var(--font-size-base);
  font-family: var(--font-family-primary);
  color: var(--color-text-primary);
  background-color: var(--color-bg-primary);
  border: 1px solid var(--color-border-primary);
  border-radius: var(--radius-lg);
  transition: all var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  outline: none;
  border-color: var(--color-border-focus);
  box-shadow: 0 0 0 3px rgba(30, 57, 133, 0.12);
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--color-text-tertiary);
}

/* Tailles des inputs */
.form-input--sm {
  padding: var(--space-2);
  font-size: var(--font-size-sm);
}

.form-input--lg {
  padding: var(--space-4);
  font-size: var(--font-size-lg);
}

/* États d'erreur */
.form-input--error,
.form-textarea--error,
.form-select--error {
  border-color: var(--color-error);
}

.form-input--error:focus,
.form-textarea--error:focus,
.form-select--error:focus {
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.12);
}

.form-error {
  margin-top: var(--space-1);
  font-size: var(--font-size-sm);
  color: var(--color-error);
}

.form-help {
  margin-top: var(--space-1);
  font-size: var(--font-size-sm);
  color: var(--color-text-tertiary);
}

/* ==========================================
   SYSTÈME DE TAGS ET BADGES
   ========================================== */

.tag {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-2);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  border-radius: var(--radius-base);
  text-decoration: none;
  transition: all var(--transition-fast);
}

/* Variants de tags */
.tag--primary {
  background-color: var(--color-primary-100);
  color: var(--color-primary-800);
}

.tag--primary:hover {
  background-color: var(--color-primary-200);
}

.tag--accent {
  background-color: var(--color-accent-100);
  color: var(--color-accent-800);
}

.tag--accent:hover {
  background-color: var(--color-accent-200);
}

.tag--neutral {
  background-color: var(--color-neutral-100);
  color: var(--color-neutral-700);
}

.tag--neutral:hover {
  background-color: var(--color-neutral-200);
}

/* Tailles de tags */
.tag--sm {
  padding: var(--space-0_5) var(--space-1_5);
  font-size: var(--font-size-xs);
}

.tag--md {
  padding: var(--space-1) var(--space-2);
  font-size: var(--font-size-sm);
}

.tag--lg {
  padding: var(--space-1_5) var(--space-3);
  font-size: var(--font-size-base);
}

/* Mode sombre pour tags */
[data-theme="dark"] .tag--primary,
body.m-dark .tag--primary {
  background-color: rgba(78, 169, 159, 0.15);
  color: var(--color-accent-400);
}

[data-theme="dark"] .tag--neutral,
body.m-dark .tag--neutral {
  background-color: var(--color-neutral-800);
  color: var(--color-neutral-300);
}

/* ==========================================
   SYSTÈME D'AVATARS
   ========================================== */

.avatar {
  display: inline-block;
  border-radius: var(--radius-full);
  overflow: hidden;
  background-color: var(--color-neutral-100);
  border: 2px solid var(--color-bg-primary);
}

.avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* Tailles d'avatars */
.avatar--xs { width: 1.5rem; height: 1.5rem; } /* 24px */
.avatar--sm { width: 2rem; height: 2rem; }     /* 32px */
.avatar--md { width: 2.5rem; height: 2.5rem; } /* 40px */
.avatar--lg { width: 3rem; height: 3rem; }     /* 48px */
.avatar--xl { width: 4rem; height: 4rem; }     /* 64px */
.avatar--2xl { width: 5rem; height: 5rem; }    /* 80px */

/* Avatar avec initiales */
.avatar--initials {
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: var(--font-weight-medium);
  color: var(--color-text-inverse);
  background-color: var(--color-primary-600);
}

/* ==========================================
   SYSTÈME DE NAVIGATION
   ========================================== */

.nav {
  display: flex;
  gap: var(--space-1);
}

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

.nav--horizontal {
  flex-direction: row;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  color: var(--color-text-secondary);
  text-decoration: none;
  border-radius: var(--radius-lg);
  transition: all var(--transition-fast);
  font-weight: var(--font-weight-medium);
}

.nav-item:hover {
  background-color: var(--color-bg-secondary);
  color: var(--color-text-primary);
}

.nav-item--active {
  background-color: var(--color-primary-600);
  color: var(--color-text-inverse);
}

.nav-item--active:hover {
  background-color: var(--color-primary-700);
}

/* ==========================================
   ÉTATS D'INTERACTION UNIFORMES
   ========================================== */

.interactive {
  position: relative;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.interactive::before {
  content: '';
  position: absolute;
  inset: 0;
  background-color: transparent;
  transition: background-color var(--transition-fast);
  pointer-events: none;
  border-radius: inherit;
}

.interactive:hover::before {
  background-color: rgba(0, 0, 0, 0.04);
}

.interactive:active::before {
  background-color: rgba(0, 0, 0, 0.08);
}

/* Mode sombre pour états interactifs */
[data-theme="dark"] .interactive:hover::before,
body.m-dark .interactive:hover::before {
  background-color: rgba(255, 255, 255, 0.05);
}

[data-theme="dark"] .interactive:active::before,
body.m-dark .interactive:active::before {
  background-color: rgba(255, 255, 255, 0.1);
}

/* ==========================================
   GRILLE ET LAYOUT
   ========================================== */

.container {
  width: 100%;
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-4);
  padding-right: var(--space-4);
}

@media (min-width: 640px) {
  .container {
    max-width: 640px;
    padding-left: var(--space-6);
    padding-right: var(--space-6);
  }
}

@media (min-width: 768px) {
  .container {
    max-width: 768px;
  }
}

@media (min-width: 1024px) {
  .container {
    max-width: 1024px;
  }
}

@media (min-width: 1280px) {
  .container {
    max-width: 1280px;
  }
}

@media (min-width: 1536px) {
  .container {
    max-width: 1536px;
  }
}

/* Grille flexible */
.grid {
  display: grid;
  gap: var(--space-4);
}

.grid--cols-1 { grid-template-columns: 1fr; }
.grid--cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid--cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid--cols-4 { grid-template-columns: repeat(4, 1fr); }

.grid--auto-fill-sm {
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
}

.grid--auto-fill-md {
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
}

.grid--auto-fill-lg {
  grid-template-columns: repeat(auto-fill, minmax(400px, 1fr));
}

/* Flexbox utilitaires */
.flex {
  display: flex;
}

.flex-col {
  flex-direction: column;
}

.items-center {
  align-items: center;
}

.items-start {
  align-items: flex-start;
}

.items-end {
  align-items: flex-end;
}

.justify-center {
  justify-content: center;
}

.justify-between {
  justify-content: space-between;
}

.justify-start {
  justify-content: flex-start;
}

.justify-end {
  justify-content: flex-end;
}

/* ==========================================
   TABLE DES MATIÈRES FLOTTANTE
   ========================================== */

.toc-sidebar {
  position: fixed;
  top: 50%;
  right: var(--space-6);
  transform: translateY(-50%);
  width: 280px;
  max-height: 70vh;
  background-color: var(--color-bg-elevated);
  border: 1px solid var(--color-border-primary);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  z-index: var(--z-sticky);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
  overflow: hidden;
  backdrop-filter: blur(10px);
}

.toc-sidebar.visible {
  opacity: 1;
  visibility: visible;
}

.toc-sidebar.collapsed {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

.toc-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4);
  border-bottom: 1px solid var(--color-border-primary);
  background-color: var(--color-bg-secondary);
}

.toc-title {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
  margin: 0;
}

.toc-toggle {
  background: none;
  border: none;
  padding: var(--space-1);
  border-radius: var(--radius-base);
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
}

.toc-toggle:hover {
  background-color: var(--color-bg-tertiary);
  color: var(--color-text-primary);
}

.toc-toggle svg {
  transition: transform var(--transition-fast);
}

.toc-content {
  max-height: calc(70vh - 60px);
  overflow-y: auto;
  padding: var(--space-2) 0;
}

.toc-sidebar.collapsed .toc-header {
  display: none;
}

.toc-sidebar.collapsed .toc-content {
  display: none;
}

.toc-sidebar.collapsed .toc-toggle {
  padding: var(--space-3);
}

.toc-sidebar.collapsed .toc-toggle svg {
  transform: rotate(180deg);
}

.toc-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.toc-item {
  position: relative;
}

.toc-link {
  display: block;
  padding: var(--space-2) var(--space-4);
  color: var(--color-text-secondary);
  text-decoration: none;
  font-size: var(--font-size-sm);
  line-height: var(--line-height-snug);
  transition: all var(--transition-fast);
  border-right: 3px solid transparent;
  position: relative;
}

.toc-link:hover {
  color: var(--color-text-primary);
  background-color: var(--color-bg-secondary);
}

.toc-link.active {
  color: var(--color-primary-600);
  background-color: rgba(30, 57, 133, 0.08);
  border-right-color: var(--color-primary-600);
  font-weight: var(--font-weight-medium);
}

/* Indentation pour les niveaux de titres */
.toc-link[data-level="1"] { padding-right: var(--space-4); }
.toc-link[data-level="2"] { padding-right: var(--space-6); }
.toc-link[data-level="3"] { padding-right: var(--space-8); }
.toc-link[data-level="4"] { padding-right: var(--space-10); }
.toc-link[data-level="5"] { padding-right: var(--space-12); }
.toc-link[data-level="6"] { padding-right: var(--space-14); }

/* Indicateurs visuels pour les niveaux */
.toc-link[data-level="2"]::before,
.toc-link[data-level="3"]::before,
.toc-link[data-level="4"]::before,
.toc-link[data-level="5"]::before,
.toc-link[data-level="6"]::before {
  content: '';
  position: absolute;
  right: var(--space-5);
  top: 50%;
  transform: translateY(-50%);
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background-color: var(--color-text-tertiary);
  opacity: 0.5;
}

.toc-link[data-level="3"]::before { width: 3px; height: 3px; }
.toc-link[data-level="4"]::before { width: 2px; height: 2px; }
.toc-link[data-level="5"]::before { width: 2px; height: 2px; opacity: 0.3; }
.toc-link[data-level="6"]::before { width: 1px; height: 1px; opacity: 0.3; }

/* Progress bar */
.toc-progress {
  position: absolute;
  top: 0;
  right: 0;
  width: 2px;
  height: 0%;
  background: linear-gradient(to bottom, var(--color-primary-600), var(--color-accent-500));
  transition: height var(--transition-fast);
}

/* Mode sombre */
[data-theme="dark"] .toc-sidebar,
body.m-dark .toc-sidebar {
  background-color: var(--elevation-2);
  border-color: var(--color-border-primary);
  backdrop-filter: blur(10px);
}

[data-theme="dark"] .toc-header,
body.m-dark .toc-header {
  background-color: var(--elevation-1);
  border-color: var(--color-border-primary);
}

[data-theme="dark"] .toc-link.active,
body.m-dark .toc-link.active {
  color: var(--color-accent-500);
  background-color: rgba(78, 169, 159, 0.15);
  border-right-color: var(--color-accent-500);
}

[data-theme="dark"] .toc-link:hover,
body.m-dark .toc-link:hover {
  background-color: var(--elevation-3);
}

/* Masquer sur mobile et tablette */
@media (max-width: 1200px) {
  .toc-sidebar {
    display: none !important;
  }
}

/* Scrollbar personnalisée pour la TOC */
.toc-content::-webkit-scrollbar {
  width: 4px;
}

.toc-content::-webkit-scrollbar-track {
  background: var(--color-bg-secondary);
}

.toc-content::-webkit-scrollbar-thumb {
  background: var(--color-border-secondary);
  border-radius: 2px;
}

.toc-content::-webkit-scrollbar-thumb:hover {
  background: var(--color-text-tertiary);
}