/* ==========================================================================
   FULL BODY 17 — DESIGN SYSTEM & STYLES GLOBAUX
   Style Premium Fitness / Wellness • Mobile-First • Dark & Light Mode
   ========================================================================== */

:root {
  /* Palette Mode Sombre (Par défaut) */
  --bg-app: #090d16;
  --bg-surface: #111827;
  --bg-surface-elevated: #1e293b;
  --bg-card: #141f32;
  --bg-card-hover: #1e2b45;
  --bg-card-active: #243452;

  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-inverse: #090d16;

  /* Accents d'action & dynamisme */
  --accent-work: #10b981;        /* Vert Émeraude — Effort */
  --accent-work-glow: rgba(16, 185, 129, 0.35);
  --accent-work-bg: rgba(16, 185, 129, 0.12);

  --accent-rest: #06b6d4;        /* Bleu Cyan — Récupération */
  --accent-rest-glow: rgba(6, 182, 212, 0.35);
  --accent-rest-bg: rgba(6, 182, 212, 0.12);

  --accent-prep: #f59e0b;        /* Orange Ambre — Préparation */
  --accent-prep-glow: rgba(245, 158, 11, 0.35);
  --accent-prep-bg: rgba(245, 158, 11, 0.12);

  --accent-gold: #fbbf24;        /* Or Trophée / Badges */
  --accent-danger: #ef4444;      /* Rouge Alerte / Quitter */

  /* Bordures et ombres */
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-medium: rgba(255, 255, 255, 0.14);
  --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 10px 25px -5px rgba(0, 0, 0, 0.45);
  --shadow-lg: 0 20px 35px -8px rgba(0, 0, 0, 0.6);
  --shadow-glow: 0 0 30px var(--accent-work-glow);

  /* Rayons de courbure */
  --radius-xs: 8px;
  --radius-sm: 14px;
  --radius-md: 20px;
  --radius-lg: 28px;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 0.18s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-spring: 0.45s cubic-bezier(0.175, 0.885, 0.32, 1.275);

  /* Tailles et Espacements */
  --safe-bottom: env(safe-area-inset-bottom, 16px);
  --safe-top: env(safe-area-inset-top, 16px);

  /* Z-index scale */
  --z-header: 40;
  --z-nav: 50;
  --z-overlay: 100;
  --z-modal: 150;
  --z-celebration: 200;

  color-scheme: dark;
}

/* Mode Clair */
[data-theme="light"] {
  --bg-app: #f4f6fb;
  --bg-surface: #ffffff;
  --bg-surface-elevated: #f1f5f9;
  --bg-card: #ffffff;
  --bg-card-hover: #f8fafc;
  --bg-card-active: #e2e8f0;

  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --text-inverse: #ffffff;

  --border-subtle: rgba(0, 0, 0, 0.07);
  --border-medium: rgba(0, 0, 0, 0.12);
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 8px 20px -3px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 16px 30px -5px rgba(0, 0, 0, 0.12);
  color-scheme: light;
}

/* ==========================================================================
   RESET & BASE
   ========================================================================== */

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

button, .nav-item, .ctrl-btn, .switch, .icon-btn {
  user-select: none;
}

html {
  width: 100%;
  min-height: 100%;
  overflow-x: hidden;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  touch-action: pan-y;
}

body {
  width: 100%;
  min-height: 100vh;
  min-height: 100dvh;
  background-color: var(--bg-app);
  color: var(--text-primary);
  font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  line-height: 1.5;
  overflow-x: hidden;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  touch-action: pan-y;
  display: flex;
  justify-content: center;
  align-items: stretch;
}

/* Conteneur principal de l'application (Contraint en desktop / pleine largeur mobile) */
.app-container {
  width: 100%;
  max-width: 480px;
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  position: relative;
  background-color: var(--bg-app);
  box-shadow: 0 0 50px rgba(0, 0, 0, 0.4);
}

@media (min-width: 768px) {
  .app-container {
    max-width: 520px;
    margin: 20px auto;
    min-height: calc(100dvh - 40px);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-subtle);
    overflow: hidden;
  }
}

/* ==========================================================================
   HEADER PRINCIPAL
   ========================================================================== */

.app-header {
  padding: calc(var(--safe-top) + 12px) 20px 12px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--bg-app);
  position: sticky;
  top: 0;
  z-index: 40;
  border-bottom: 1px solid var(--border-subtle);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.brand-badge {
  display: flex;
  align-items: center;
  gap: 10px;
}

.brand-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--accent-work), #059669);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 900;
  font-size: 1.1rem;
  box-shadow: 0 4px 10px var(--accent-work-glow);
}

.brand-info {
  display: flex;
  flex-direction: column;
}

.brand-title {
  font-size: 1.1rem;
  font-weight: 800;
  letter-spacing: 0.5px;
  line-height: 1.2;
}

.brand-subtitle {
  font-size: 0.75rem;
  color: var(--accent-work);
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
}

.header-actions {
  display: flex;
  gap: 8px;
  align-items: center;
}

.icon-btn {
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition-fast);
}

@media (hover: hover) and (pointer: fine) {
  .icon-btn:hover {
    background: var(--bg-card-hover);
    transform: translateY(-1px);
  }
}

.icon-btn:active {
  transform: scale(0.95);
}

/* ==========================================================================
   NAVIGATION INFÉRIEURE (BOTTOM BAR)
   ========================================================================== */

.bottom-nav {
  position: fixed;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  max-width: 480px;
  background: rgba(17, 24, 39, 0.88);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-top: 1px solid var(--border-subtle);
  display: flex;
  justify-content: space-around;
  padding: 8px 12px calc(var(--safe-bottom) + 6px) 12px;
  z-index: 50;
}

[data-theme="light"] .bottom-nav {
  background: rgba(255, 255, 255, 0.9);
}

@media (min-width: 768px) {
  .bottom-nav {
    max-width: 520px;
    border-bottom-left-radius: var(--radius-lg);
    border-bottom-right-radius: var(--radius-lg);
  }
}

.nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 0.72rem;
  font-weight: 600;
  cursor: pointer;
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  transition: var(--transition-fast);
  flex: 1;
}

.nav-item svg {
  width: 22px;
  height: 22px;
  transition: transform var(--transition-fast);
}

.nav-item.active {
  color: var(--accent-work);
}

.nav-item.active svg {
  transform: scale(1.1);
  stroke: var(--accent-work);
}

/* ==========================================================================
   CONTENU DES VUES (VIEW ROUTER)
   ========================================================================== */

.view-container {
  flex: 1 0 auto;
  width: 100%;
  padding: 16px 18px 110px 18px;
  touch-action: pan-y;
}

.view {
  display: none;
  animation: fadeIn 0.25s ease forwards;
}

.view.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ==========================================================================
   TYPOGRAPHIE & TITRES DE SECTION
   ========================================================================== */

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 14px;
}

.section-title {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -0.3px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.section-subtitle {
  font-size: 0.8rem;
  color: var(--text-secondary);
  font-weight: 500;
}

/* ==========================================================================
   ACCESSIBILITÉ
   ========================================================================== */

:focus-visible {
  outline: 2px solid var(--accent-work);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}