/* =========================================================================
   Trans'Pro Experience — Design System
   Inspiré de : Apple, Stripe, Linear, Airbnb
   ========================================================================= */

/* --- Variables & Tokens -------------------------------------------------- */
:root {
  /* Couleurs */
  --color-bg:           #FAFAFA;
  --color-surface:      #FFFFFF;
  --color-surface-2:    #F4F4F5;
  --color-border:       #E4E4E7;
  --color-border-focus: #FF6B00;
  --color-text-primary: #09090B;
  --color-text-secondary: #71717A;
  --color-text-muted:   #A1A1AA;
  --color-accent:       #FF6B00;
  --color-accent-light: #FFF4ED;
  --color-accent-dark:  #E05500;
  --color-success:      #16A34A;
  --color-success-light:#F0FDF4;
  --color-warning:      #D97706;
  --color-error:        #DC2626;

  /* Typographie */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-size-xs:   0.75rem;   /* 12px */
  --font-size-sm:   0.875rem;  /* 14px */
  --font-size-base: 1rem;      /* 16px */
  --font-size-lg:   1.125rem;  /* 18px */
  --font-size-xl:   1.25rem;   /* 20px */
  --font-size-2xl:  1.5rem;    /* 24px */
  --font-size-3xl:  1.875rem;  /* 30px */
  --font-size-4xl:  2.25rem;   /* 36px */
  --font-size-5xl:  3rem;      /* 48px */
  --font-size-6xl:  3.75rem;   /* 60px */

  /* Espacement */
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;

  /* Rayons */
  --radius-sm:  6px;
  --radius-md:  12px;
  --radius-lg:  16px;
  --radius-xl:  24px;
  --radius-2xl: 32px;
  --radius-full: 9999px;

  /* Ombres */
  --shadow-sm:  0 1px 2px rgba(0,0,0,0.05);
  --shadow-md:  0 4px 12px rgba(0,0,0,0.08);
  --shadow-lg:  0 8px 32px rgba(0,0,0,0.10);
  --shadow-xl:  0 16px 48px rgba(0,0,0,0.12);
  --shadow-accent: 0 8px 24px rgba(255,107,0,0.25);

  /* Transitions */
  --transition-fast:   150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base:   250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-spring: 400ms cubic-bezier(0.34, 1.56, 0.64, 1);
  --transition-smooth: 350ms cubic-bezier(0.16, 1, 0.3, 1);
}

/* --- Reset & Base --------------------------------------------------------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  font-family: var(--font-sans);
  font-size: var(--font-size-base);
  color: var(--color-text-primary);
  background: var(--color-bg);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}

/* --- Typographie ---------------------------------------------------------- */
.text-xs    { font-size: var(--font-size-xs); }
.text-sm    { font-size: var(--font-size-sm); }
.text-base  { font-size: var(--font-size-base); }
.text-lg    { font-size: var(--font-size-lg); }
.text-xl    { font-size: var(--font-size-xl); }
.text-2xl   { font-size: var(--font-size-2xl); }
.text-3xl   { font-size: var(--font-size-3xl); }
.text-4xl   { font-size: var(--font-size-4xl); }
.text-5xl   { font-size: var(--font-size-5xl); }
.text-muted { color: var(--color-text-secondary); }
.text-accent { color: var(--color-accent); }
.font-medium { font-weight: 500; }
.font-semibold { font-weight: 600; }
.font-bold   { font-weight: 700; }

/* --- Layout principal ----------------------------------------------------- */
.app-container {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--color-bg);
}

.app-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: 60px;
  background: rgba(250,250,250,0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-6);
}

.app-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-weight: 700;
  font-size: var(--font-size-lg);
  color: var(--color-text-primary);
  text-decoration: none;
}

.app-logo-icon {
  width: 32px;
  height: 32px;
  background: var(--color-accent);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 16px;
}

/* --- Barre de progression ------------------------------------------------- */
.progress-bar-container {
  position: fixed;
  top: 60px;
  left: 0;
  right: 0;
  z-index: 99;
  height: 3px;
  background: var(--color-border);
}

.progress-bar-fill {
  height: 100%;
  background: var(--color-accent);
  transition: width var(--transition-smooth);
  border-radius: 0 var(--radius-full) var(--radius-full) 0;
}

/* --- Écran principal ------------------------------------------------------ */
.screen {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  padding: 100px var(--space-6) var(--space-20);
  min-height: 100vh;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity var(--transition-smooth), transform var(--transition-smooth);
}

.screen.active {
  opacity: 1;
  transform: translateY(0);
}

.screen.exit-left {
  display: flex;
  opacity: 0;
  transform: translateX(-40px);
}

.screen.exit-right {
  display: flex;
  opacity: 0;
  transform: translateX(40px);
}

.screen.enter-right {
  display: flex;
  opacity: 0;
  transform: translateX(40px);
}

.screen.enter-left {
  display: flex;
  opacity: 0;
  transform: translateX(-40px);
}

.screen-content {
  width: 100%;
  max-width: 600px;
}

/* --- Titres d'écran ------------------------------------------------------- */
.screen-eyebrow {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--space-3);
}

.screen-title {
  font-size: var(--font-size-4xl);
  font-weight: 700;
  line-height: 1.15;
  color: var(--color-text-primary);
  margin-bottom: var(--space-3);
  letter-spacing: -0.02em;
}

.screen-subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  line-height: 1.6;
  margin-bottom: var(--space-8);
}

@media (max-width: 640px) {
  .screen-title { font-size: var(--font-size-3xl); }
  .screen-subtitle { font-size: var(--font-size-base); }
}

/* --- Boutons -------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-4) var(--space-8);
  border-radius: var(--radius-full);
  font-size: var(--font-size-base);
  font-weight: 600;
  font-family: var(--font-sans);
  cursor: pointer;
  border: none;
  transition: all var(--transition-base);
  text-decoration: none;
  white-space: nowrap;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}

.btn:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
}

.btn-primary {
  background: var(--color-accent);
  color: white;
  box-shadow: var(--shadow-accent);
}

.btn-primary:hover {
  background: var(--color-accent-dark);
  transform: translateY(-1px);
  box-shadow: 0 12px 32px rgba(255,107,0,0.35);
}

.btn-primary:active {
  transform: translateY(0) scale(0.98);
  box-shadow: var(--shadow-accent);
}

.btn-primary:disabled {
  background: var(--color-text-muted);
  box-shadow: none;
  cursor: not-allowed;
  transform: none;
}

.btn-secondary {
  background: var(--color-surface);
  color: var(--color-text-primary);
  border: 1.5px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
  background: var(--color-surface-2);
  border-color: var(--color-text-muted);
}

.btn-ghost {
  background: transparent;
  color: var(--color-text-secondary);
  padding: var(--space-3) var(--space-4);
}

.btn-ghost:hover {
  color: var(--color-text-primary);
  background: var(--color-surface-2);
}

.btn-lg {
  padding: var(--space-5) var(--space-10);
  font-size: var(--font-size-lg);
  border-radius: var(--radius-full);
}

.btn-full {
  width: 100%;
}

/* Icône dans le bouton */
.btn-icon {
  width: 20px;
  height: 20px;
  transition: transform var(--transition-spring);
}

.btn:hover .btn-icon-arrow {
  transform: translateX(4px);
}

/* --- Inputs --------------------------------------------------------------- */
.input-group {
  position: relative;
  margin-bottom: var(--space-4);
}

.input-label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-2);
}

.input-field {
  width: 100%;
  padding: var(--space-4) var(--space-5);
  font-size: var(--font-size-lg);
  font-family: var(--font-sans);
  color: var(--color-text-primary);
  background: var(--color-surface);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
  outline: none;
  -webkit-appearance: none;
}

.input-field::placeholder {
  color: var(--color-text-muted);
}

.input-field:hover {
  border-color: var(--color-text-muted);
}

.input-field:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(255,107,0,0.12);
}

.input-field.input-xl {
  font-size: var(--font-size-2xl);
  font-weight: 600;
  padding: var(--space-5) var(--space-6);
  border-radius: var(--radius-xl);
}

/* --- Tuiles de sélection -------------------------------------------------- */
.tile-grid {
  display: grid;
  gap: var(--space-4);
}

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

@media (max-width: 480px) {
  .tile-grid-3 { grid-template-columns: repeat(2, 1fr); }
  .tile-grid-4 { grid-template-columns: repeat(2, 1fr); }
}

.tile {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  padding: var(--space-6) var(--space-4);
  background: var(--color-surface);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-xl);
  cursor: pointer;
  transition: all var(--transition-spring);
  text-align: center;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
  position: relative;
  overflow: hidden;
}

.tile::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--color-accent-light);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.tile:hover {
  border-color: var(--color-accent);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.tile:hover::before { opacity: 0.5; }

.tile:active {
  transform: scale(0.97);
}

.tile.selected {
  border-color: var(--color-accent);
  background: var(--color-accent-light);
  box-shadow: 0 0 0 3px rgba(255,107,0,0.15);
}

.tile.selected::before { opacity: 1; }

.tile-emoji {
  font-size: 2rem;
  line-height: 1;
  position: relative;
  z-index: 1;
}

.tile-label {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-text-primary);
  position: relative;
  z-index: 1;
}

.tile-sublabel {
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
  position: relative;
  z-index: 1;
}

/* Tuile grande (service principal) */
.tile-lg {
  padding: var(--space-8) var(--space-6);
  border-radius: var(--radius-2xl);
}

.tile-lg .tile-emoji { font-size: 2.5rem; }
.tile-lg .tile-label { font-size: var(--font-size-base); }

/* --- Checkmark de sélection ----------------------------------------------- */
.tile-check {
  position: absolute;
  top: var(--space-3);
  right: var(--space-3);
  width: 20px;
  height: 20px;
  background: var(--color-accent);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transform: scale(0.5);
  transition: all var(--transition-spring);
  z-index: 2;
}

.tile.selected .tile-check {
  opacity: 1;
  transform: scale(1);
}

.tile-check svg {
  width: 12px;
  height: 12px;
  stroke: white;
  stroke-width: 2.5;
  fill: none;
}

/* --- Cartes objet (inventaire) -------------------------------------------- */
.item-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-5);
  background: var(--color-surface);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
}

.item-card:hover {
  border-color: var(--color-border-focus);
  box-shadow: var(--shadow-sm);
}

.item-card.has-quantity {
  border-color: var(--color-accent);
  background: var(--color-accent-light);
}

.item-card-info {
  flex: 1;
  min-width: 0;
}

.item-card-name {
  font-weight: 600;
  font-size: var(--font-size-base);
  color: var(--color-text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.item-card-volume {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  margin-top: 2px;
}

.item-card-counter {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-shrink: 0;
}

.counter-btn {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  border: 1.5px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text-primary);
  font-size: var(--font-size-lg);
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-spring);
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}

.counter-btn:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  transform: scale(1.1);
}

.counter-btn:active {
  transform: scale(0.92);
}

.counter-btn.btn-add {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: white;
  box-shadow: 0 2px 8px rgba(255,107,0,0.3);
}

.counter-btn.btn-add:hover {
  background: var(--color-accent-dark);
  transform: scale(1.12);
}

.counter-value {
  font-size: var(--font-size-lg);
  font-weight: 700;
  min-width: 24px;
  text-align: center;
  color: var(--color-text-primary);
  transition: transform var(--transition-spring);
}

.counter-value.bump {
  animation: counterBump 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes counterBump {
  0%   { transform: scale(1); }
  50%  { transform: scale(1.4); }
  100% { transform: scale(1); }
}

/* --- Onglets de pièces ---------------------------------------------------- */
.room-tabs {
  display: flex;
  gap: var(--space-2);
  overflow-x: auto;
  padding-bottom: var(--space-1);
  scrollbar-width: none;
  -ms-overflow-style: none;
  margin-bottom: var(--space-5);
}

.room-tabs::-webkit-scrollbar { display: none; }

.room-tab {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  font-weight: 500;
  cursor: pointer;
  white-space: nowrap;
  border: 1.5px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text-secondary);
  transition: all var(--transition-base);
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}

.room-tab:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.room-tab.active {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: white;
  box-shadow: 0 2px 8px rgba(255,107,0,0.3);
}

.room-tab-count {
  background: rgba(255,255,255,0.3);
  border-radius: var(--radius-full);
  padding: 1px 6px;
  font-size: var(--font-size-xs);
  font-weight: 700;
}

.room-tab:not(.active) .room-tab-count {
  background: var(--color-accent-light);
  color: var(--color-accent);
}

/* --- Indicateur de volume flottant --------------------------------------- */
.volume-indicator {
  position: sticky;
  bottom: var(--space-4);
  z-index: 50;
  margin-top: var(--space-6);
}

.volume-pill {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--color-text-primary);
  color: white;
  border-radius: var(--radius-full);
  padding: var(--space-3) var(--space-4) var(--space-3) var(--space-5);
  box-shadow: var(--shadow-xl);
  gap: var(--space-4);
}

.volume-pill-info {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.volume-pill-number {
  font-size: var(--font-size-2xl);
  font-weight: 800;
  color: var(--color-accent);
  transition: all var(--transition-spring);
}

.volume-pill-number.bump {
  animation: volumeBump 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes volumeBump {
  0%   { transform: scale(1); }
  40%  { transform: scale(1.25); }
  100% { transform: scale(1); }
}

.volume-pill-label {
  font-size: var(--font-size-xs);
  color: rgba(255,255,255,0.6);
  line-height: 1.3;
}

.volume-pill-label strong {
  display: block;
  color: white;
  font-size: var(--font-size-sm);
}

/* --- Écran de résultat ---------------------------------------------------- */
.result-hero {
  text-align: center;
  padding: var(--space-8) 0;
}

.result-volume-display {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  background: var(--color-accent-light);
  border: 2px solid var(--color-accent);
  border-radius: var(--radius-2xl);
  padding: var(--space-8) var(--space-12);
  margin-bottom: var(--space-6);
}

.result-volume-number {
  font-size: var(--font-size-6xl);
  font-weight: 800;
  color: var(--color-accent);
  line-height: 1;
  letter-spacing: -0.04em;
}

.result-volume-unit {
  font-size: var(--font-size-xl);
  color: var(--color-text-secondary);
  font-weight: 500;
  margin-top: var(--space-1);
}

.result-details-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-4);
  margin-bottom: var(--space-8);
}

.result-detail-card {
  background: var(--color-surface);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  text-align: center;
}

.result-detail-icon {
  font-size: 1.5rem;
  margin-bottom: var(--space-2);
}

.result-detail-value {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--color-text-primary);
}

.result-detail-label {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  margin-top: 2px;
}

/* --- Preuve sociale ------------------------------------------------------- */
.social-proof {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  background: var(--color-success-light);
  border: 1px solid #BBF7D0;
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-6);
}

.social-proof-stars {
  color: #F59E0B;
  font-size: var(--font-size-sm);
  letter-spacing: 1px;
}

.social-proof-text {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

.social-proof-text strong {
  color: var(--color-text-primary);
}

/* --- Formulaire de contact ------------------------------------------------ */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.input-row {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-4);
}

@media (max-width: 480px) {
  .input-row { grid-template-columns: 1fr; }
}

/* --- Confirmation --------------------------------------------------------- */
.confirmation-hero {
  text-align: center;
  padding: var(--space-8) 0;
}

.confirmation-check {
  width: 80px;
  height: 80px;
  background: var(--color-success-light);
  border: 2px solid var(--color-success);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-6);
  font-size: 2rem;
  animation: checkBounce var(--transition-spring) forwards;
}

@keyframes checkBounce {
  0%   { transform: scale(0); opacity: 0; }
  60%  { transform: scale(1.15); opacity: 1; }
  100% { transform: scale(1); opacity: 1; }
}

.next-steps {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin: var(--space-8) 0;
}

.next-step-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
  padding: var(--space-4) var(--space-5);
  background: var(--color-surface);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.next-step-number {
  width: 28px;
  height: 28px;
  background: var(--color-accent);
  color: white;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-sm);
  font-weight: 700;
  flex-shrink: 0;
}

.next-step-text {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: 1.5;
}

.next-step-text strong {
  display: block;
  color: var(--color-text-primary);
  font-weight: 600;
  margin-bottom: 2px;
}

/* --- Navigation bas d'écran (sticky) -------------------------------------- */
.screen-nav {
  position: sticky;
  bottom: 0;
  background: rgba(250,250,250,0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-top: 1px solid var(--color-border);
  padding: var(--space-4) var(--space-6);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  z-index: 80;
}

.screen-nav-back {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  cursor: pointer;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
  border: none;
  background: none;
  font-family: var(--font-sans);
}

.screen-nav-back:hover {
  color: var(--color-text-primary);
  background: var(--color-surface-2);
}

/* --- Animations globales -------------------------------------------------- */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}

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

@keyframes scaleIn {
  from { opacity: 0; transform: scale(0.92); }
  to   { opacity: 1; transform: scale(1); }
}

.animate-fade-in-up {
  animation: fadeInUp 0.5s var(--transition-smooth) both;
}

.animate-stagger > * {
  opacity: 0;
  animation: fadeInUp 0.4s var(--transition-smooth) both;
}

.animate-stagger > *:nth-child(1) { animation-delay: 0ms; }
.animate-stagger > *:nth-child(2) { animation-delay: 60ms; }
.animate-stagger > *:nth-child(3) { animation-delay: 120ms; }
.animate-stagger > *:nth-child(4) { animation-delay: 180ms; }
.animate-stagger > *:nth-child(5) { animation-delay: 240ms; }
.animate-stagger > *:nth-child(6) { animation-delay: 300ms; }
.animate-stagger > *:nth-child(7) { animation-delay: 360ms; }
.animate-stagger > *:nth-child(8) { animation-delay: 420ms; }

/* --- Autocomplete --------------------------------------------------------- */
.autocomplete-dropdown {
  position: absolute;
  top: calc(100% + 4px);
  left: 0;
  right: 0;
  background: var(--color-surface);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  z-index: 200;
  overflow: hidden;
  animation: scaleIn 0.15s var(--transition-smooth) both;
}

.autocomplete-item {
  padding: var(--space-3) var(--space-5);
  cursor: pointer;
  font-size: var(--font-size-base);
  transition: background var(--transition-fast);
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.autocomplete-item:hover,
.autocomplete-item.highlighted {
  background: var(--color-accent-light);
  color: var(--color-accent);
}

/* --- Loader / Spinner ----------------------------------------------------- */
.spinner {
  width: 20px;
  height: 20px;
  border: 2px solid rgba(255,255,255,0.3);
  border-top-color: white;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

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

/* --- Responsive mobile ---------------------------------------------------- */
@media (max-width: 640px) {
  .app-header { padding: 0 var(--space-4); }
  .screen { padding: 90px var(--space-4) 120px; }
  .screen-nav { padding: var(--space-3) var(--space-4); }
  .result-details-grid { grid-template-columns: repeat(2, 1fr); }
  .result-volume-number { font-size: var(--font-size-5xl); }
}

/* --- Utilitaires ---------------------------------------------------------- */
.hidden { display: none !important; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
.text-center { text-align: center; }
.mt-2 { margin-top: var(--space-2); }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.mb-8 { margin-bottom: var(--space-8); }
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: var(--space-2); }
.gap-4 { gap: var(--space-4); }
.w-full { width: 100%; }

/* =========================================================================
   Trans'Pro v3 — Composants supplémentaires pour les étapes enrichies
   ========================================================================= */

/* --- Chips (sélection multiple) ------------------------------------------ */
.chips-group {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-3);
}
.chip {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  border: 1.5px solid var(--color-border);
  background: var(--color-surface);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
  user-select: none;
  white-space: nowrap;
}
.chip:hover { border-color: var(--color-accent); color: var(--color-accent); background: var(--color-accent-light); }
.chip.selected { border-color: var(--color-accent); background: var(--color-accent); color: #fff; }

/* --- Floor Stepper ------------------------------------------------------- */
.floor-stepper {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  background: var(--color-surface-2);
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-5);
  border: 1.5px solid var(--color-border);
  width: fit-content;
}
.floor-stepper-btn {
  width: 36px; height: 36px;
  border-radius: 50%;
  border: 1.5px solid var(--color-border);
  background: var(--color-surface);
  font-size: 1.25rem; font-weight: 600;
  color: var(--color-text-primary);
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: all var(--transition-fast);
  line-height: 1;
}
.floor-stepper-btn:hover:not(:disabled) { border-color: var(--color-accent); color: var(--color-accent); background: var(--color-accent-light); }
.floor-stepper-btn:disabled { opacity: 0.3; cursor: not-allowed; }
.floor-stepper-value { font-size: var(--font-size-xl); font-weight: 700; color: var(--color-text-primary); min-width: 2ch; text-align: center; }
.floor-stepper-hint { font-size: var(--font-size-sm); color: var(--color-text-secondary); margin-top: var(--space-2); }

/* --- Section de qualification -------------------------------------------- */
.qual-section {
  background: var(--color-surface);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  margin-bottom: var(--space-4);
}
.qual-section-title {
  font-size: var(--font-size-xs);
  font-weight: 700;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--space-3);
}
.qual-section-label {
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: var(--space-3);
}

/* --- Options de service (étape 6) ---------------------------------------- */
.service-options-grid { display: grid; grid-template-columns: 1fr; gap: var(--space-3); }
.service-option {
  display: flex; align-items: flex-start; gap: var(--space-4);
  padding: var(--space-4) var(--space-5);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  cursor: pointer;
  transition: all var(--transition-fast);
  position: relative;
}
.service-option:hover { border-color: var(--color-accent); background: var(--color-accent-light); }
.service-option.selected { border-color: var(--color-accent); background: var(--color-accent-light); }
.service-option.selected::after {
  content: '✓';
  position: absolute; top: 12px; right: 14px;
  width: 22px; height: 22px;
  background: var(--color-accent); color: #fff;
  border-radius: 50%; font-size: 0.75rem; font-weight: 700;
  display: flex; align-items: center; justify-content: center;
}
.service-option-emoji { font-size: 1.5rem; flex-shrink: 0; margin-top: 2px; }
.service-option-title { font-weight: 600; font-size: var(--font-size-base); color: var(--color-text-primary); margin-bottom: 2px; }
.service-option-desc { font-size: var(--font-size-sm); color: var(--color-text-secondary); }

/* --- Dossier récapitulatif (étape 7) ------------------------------------- */
.dossier-summary { background: var(--color-surface); border: 1.5px solid var(--color-border); border-radius: var(--radius-xl); overflow: hidden; }
.dossier-summary-title { background: var(--color-surface-2); padding: var(--space-4) var(--space-5); font-size: var(--font-size-xs); font-weight: 700; color: var(--color-text-secondary); text-transform: uppercase; letter-spacing: 0.06em; border-bottom: 1px solid var(--color-border); }
.dossier-row { display: flex; align-items: flex-start; justify-content: space-between; gap: var(--space-4); padding: var(--space-3) var(--space-5); border-bottom: 1px solid var(--color-border); font-size: var(--font-size-sm); }
.dossier-row:last-child { border-bottom: none; }
.dossier-row-label { color: var(--color-text-secondary); font-weight: 500; white-space: nowrap; min-width: 120px; }
.dossier-row-value { color: var(--color-text-primary); font-weight: 500; text-align: right; }
.dossier-row-value.highlight { color: var(--color-accent); font-weight: 700; font-size: var(--font-size-base); }
.vehicle-category { display: inline-flex; align-items: center; gap: var(--space-2); background: var(--color-surface-2); border: 1px solid var(--color-border); border-radius: var(--radius-full); padding: 2px var(--space-3); font-size: var(--font-size-sm); font-weight: 600; }

/* --- Textarea contraintes ------------------------------------------------ */
.textarea-field { width: 100%; min-height: 100px; padding: var(--space-4); border: 1.5px solid var(--color-border); border-radius: var(--radius-md); font-family: var(--font-sans); font-size: var(--font-size-base); color: var(--color-text-primary); background: var(--color-surface); resize: vertical; transition: border-color var(--transition-fast); line-height: 1.5; }
.textarea-field:focus { outline: none; border-color: var(--color-accent); box-shadow: 0 0 0 3px rgba(255,107,0,0.1); }
.textarea-hint { font-size: var(--font-size-xs); color: var(--color-text-muted); text-align: right; margin-top: var(--space-1); }

/* --- Bannière de section -------------------------------------------------- */
.section-banner { display: flex; align-items: center; gap: var(--space-3); background: linear-gradient(135deg, var(--color-accent-light) 0%, #FFF 100%); border: 1px solid rgba(255,107,0,0.2); border-radius: var(--radius-md); padding: var(--space-3) var(--space-4); margin-bottom: var(--space-5); font-size: var(--font-size-sm); color: var(--color-text-secondary); }
.section-banner-icon { font-size: 1.25rem; flex-shrink: 0; }

/* --- Responsive v3 ------------------------------------------------------- */
@media (max-width: 640px) {
  .floor-stepper { padding: var(--space-3) var(--space-4); }
  .service-option { padding: var(--space-3) var(--space-4); }
  .dossier-row { flex-direction: column; gap: var(--space-1); }
  .dossier-row-value { text-align: left; }
  .dossier-row-label { min-width: unset; }
}