/**
 * USINE - Layout
 * Structure globale de l'application : header, contenu, navigation, mini-player.
 * Utilise une approche mobile-first avec flexbox.
 */

/* === Structure globale === */
body {
  display: flex;
  flex-direction: column;
  min-height: 100dvh;
}

/* === Lien d'accessibilite (skip-link) === */
.skip-link {
  position: absolute;
  top: -100%;
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-primary);
  color: var(--color-text-inverse);
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-md);
  z-index: 9999;
  font-weight: var(--font-weight-semibold);
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: var(--space-sm);
}

/* === Bandeau hors-ligne === */
.offline-banner {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-xs) var(--space-md);
  padding-top: calc(var(--space-xs) + var(--safe-area-top));
  background: var(--color-warning);
  color: var(--color-primary-dark);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  z-index: var(--z-offline-banner);
  text-align: center;
}

.offline-banner[hidden] {
  display: none;
}

/* === En-tete === */
.app-header {
  position: sticky;
  top: 0;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  height: var(--header-height);
  padding: 0 var(--space-md);
  padding-top: var(--safe-area-top);
  background: var(--color-primary);
  color: var(--color-text-inverse);
  z-index: var(--z-header);
  box-shadow: var(--shadow-sm);
}

.app-header__btn {
  display: flex;
  align-items: center;
  justify-content: center;
  /* WCAG 2.5.5 : touch target minimum 44x44px (iOS HIG) */
  width: 44px;
  height: 44px;
  color: var(--color-text-inverse);
  border-radius: var(--radius-full);
  transition: background var(--transition-fast);
}

.app-header__btn:hover {
  background: rgba(255, 255, 255, 0.1);
}

.app-header__btn:focus-visible {
  outline: 2px solid var(--color-secondary);
  outline-offset: 2px;
}

.app-header__btn[hidden] {
  display: none;
}

.app-header__title {
  flex: 1;
  font-size: var(--font-size-md);
  font-weight: var(--font-weight-semibold);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  color: var(--color-text-inverse);
  text-decoration: none;
  -webkit-tap-highlight-color: transparent;
}

.app-header__title:hover {
  opacity: 0.85;
}

.app-header__title:focus-visible {
  outline: 2px solid var(--color-secondary);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

.app-header__btn--lang {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-bold);
  width: auto;
  padding: 0 var(--space-sm);
  border: 1px solid rgba(255, 255, 255, 0.3);
}

/* Logo CMN + nom monument dans le header */
.app-header__title {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.app-header__cmn-logo {
  flex-shrink: 0;
  opacity: 0.9;
}

.app-header__title-text {
  display: flex;
  flex-direction: column;
  min-width: 0;
  line-height: 1.15;
}

.app-header__cmn-name {
  font-size: 10px;
  font-weight: var(--font-weight-semibold);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  /* WCAG 1.4.3 : blanc plein pour garantir contraste 5.7:1 sur fond primaire */
  opacity: 1;
  color: var(--color-text-inverse);
  white-space: nowrap;
}

.app-header__monument-name {
  font-size: var(--font-size-md);
  font-weight: var(--font-weight-bold);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* === Drawer (menu burger) === */
.drawer-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.45);
  z-index: calc(var(--z-header) + 1);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-normal);
}

.drawer-overlay.is-open {
  opacity: 1;
  pointer-events: auto;
}

.app-drawer {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  width: min(280px, 80vw);
  background: var(--color-bg-card);
  z-index: calc(var(--z-header) + 2);
  display: flex;
  flex-direction: column;
  transform: translateX(100%);
  transition: transform var(--transition-normal);
  box-shadow: var(--shadow-lg);
}

.app-drawer.is-open {
  transform: translateX(0);
}

.app-drawer__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-md);
  height: var(--header-height);
  background: var(--color-primary);
  color: var(--color-text-inverse);
  flex-shrink: 0;
}

.app-drawer__title {
  font-size: var(--font-size-md);
  font-weight: var(--font-weight-bold);
}

.app-drawer__list {
  list-style: none;
  padding: var(--space-sm) 0;
  margin: 0;
  flex: 1;
  overflow-y: auto;
}

.app-drawer__item {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md) var(--space-lg);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text);
  text-decoration: none;
  transition: background var(--transition-fast);
}

.app-drawer__item:hover {
  background: var(--color-surface-hover);
}

.app-drawer__item:focus-visible {
  outline: 2px solid var(--color-secondary);
  outline-offset: -2px;
}

.app-drawer__item svg {
  flex-shrink: 0;
  color: var(--color-primary);
  opacity: 0.8;
}

/* === Zone de contenu principal === */
.app-content {
  flex: 1;
  width: 100%;
  max-width: var(--content-max-width);
  margin: 0 auto;
  /* Padding bottom pour laisser de la place a la nav + mini-player */
  padding-bottom: calc(var(--nav-height) + var(--safe-area-bottom));
  outline: none;
}

/* Quand le mini-player est visible, ajouter son espace */
body.has-mini-player .app-content {
  padding-bottom: calc(var(--nav-height) + var(--mini-player-height) + var(--safe-area-bottom));
}

.app-content__loader {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 60vh;
}

/* === Spinner de chargement === */
.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--color-bg);
  border-top-color: var(--color-secondary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

/* === Mini-player audio === */
.mini-player {
  position: fixed;
  bottom: calc(var(--nav-height) + var(--safe-area-bottom));
  left: 0;
  right: 0;
  display: flex;
  align-items: center;
  height: var(--mini-player-height);
  padding: 0 var(--space-md);
  background: var(--color-primary);
  color: var(--color-text-inverse);
  z-index: var(--z-mini-player);
  box-shadow: var(--shadow-md);
}

.mini-player[hidden] {
  display: none;
}

.mini-player__info {
  flex: 1;
  min-width: 0;
}

.mini-player__title {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.mini-player__progress {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: rgba(255, 255, 255, 0.25);
  overflow: hidden;
}

.mini-player__progress-bar {
  height: 100%;
  background: var(--color-secondary);
  width: 0%;
  transition: width 0.3s linear;
}

.mini-player__controls {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  margin-left: var(--space-md);
}

.mini-player__btn {
  display: flex;
  align-items: center;
  justify-content: center;
  /* WCAG 2.5.5 : touch target minimum 44x44px (iOS HIG) */
  width: 44px;
  height: 44px;
  color: var(--color-text-inverse);
  border-radius: var(--radius-full);
  transition: background var(--transition-fast);
}

.mini-player__btn:focus-visible {
  outline: 2px solid var(--color-secondary);
  outline-offset: 2px;
}

.mini-player__btn:hover {
  background: rgba(255, 255, 255, 0.1);
}

.mini-player__btn--close {
  opacity: 0.6;
}

/* === Navigation basse === */
.app-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  display: flex;
  align-items: stretch;
  height: calc(var(--nav-height) + var(--safe-area-bottom));
  padding-bottom: var(--safe-area-bottom);
  background: var(--color-bg-card);
  border-top: 1px solid var(--color-border);
  z-index: var(--z-nav);
}

.app-nav__item {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  font-size: var(--font-size-xs);
  color: var(--color-text-light);
  transition: none;
  -webkit-user-select: none;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}

.app-nav__item:hover {
  color: var(--color-primary);
}

.app-nav__item[aria-current="page"],
.app-nav__item.active {
  /* WCAG 1.4.3 : texte en couleur primaire (contraste 5.7:1 sur blanc) */
  color: var(--color-primary);
  font-weight: var(--font-weight-semibold);
}

/* Icone en or pour l'etat actif (indicateur visuel sans contrainte de contraste sur fond) */
.app-nav__item[aria-current="page"] svg,
.app-nav__item.active svg {
  color: var(--color-secondary);
}

.app-nav__item:focus-visible {
  outline: 2px solid var(--color-secondary);
  outline-offset: -2px;
}

.app-nav__item svg {
  width: 24px;
  height: 24px;
}

/* === Bulle chatbot (flottante) === */
.chatbot-bubble {
  position: fixed;
  bottom: calc(var(--nav-height) + var(--safe-area-bottom) + var(--space-md));
  right: var(--space-md);
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-secondary);
  color: var(--color-primary-dark);
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-lg);
  z-index: var(--z-chatbot-bubble);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.chatbot-bubble:hover {
  transform: scale(1.05);
  box-shadow: var(--shadow-xl);
}

.chatbot-bubble:active {
  transform: scale(0.95);
}

.chatbot-bubble:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 3px;
}

/* Decaler la bulle quand le mini-player est visible */
body.has-mini-player .chatbot-bubble {
  bottom: calc(var(--nav-height) + var(--mini-player-height) + var(--safe-area-bottom) + var(--space-md));
}

/* === Titres de section === */
.section__title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-text);
  margin: 0 0 var(--space-xs);
}

.section__subtitle {
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
  margin: 0 0 var(--space-lg);
  line-height: var(--line-height-relaxed);
}

/* === Utilitaires de layout === */
.container {
  width: 100%;
  max-width: var(--content-max-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.section {
  padding: var(--space-lg) 0;
}

.section--padded {
  padding: var(--space-lg) var(--space-md);
}

.flex-center {
  display: flex;
  align-items: center;
  justify-content: center;
}

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