/* Emailr — landing "La Feuille de route"
   Monde : carte routière pliée / feuille de route d'étape.
   Sol papier #F2ECE0, encre offset, rouge de route, bleu d'écusson, graphite.

   Palette, polices et textures de marque : static/css/tokens.css (partagé avec
   la console /app). Ne pas redupliquer ces valeurs ici. */

@import url('/static/css/tokens.css');

:root {
  --mesure: 56ch;
  --gouttiere: clamp(1.25rem, 3vw, 2.5rem);
  --ecusson-taille: 2.15rem;
  --ecusson-centre: calc(var(--ecusson-taille) / 2);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--papier);
  color: var(--graphite);
  font-family: var(--body);
  font-size: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  line-height: 1.6;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

::selection {
  background: var(--rouge);
  color: var(--papier);
}

/* Les surfaces du navigateur qu'on n'a pas dessinées portent le design. */
html {
  scrollbar-color: var(--graphite-3) var(--papier-sombre);
  scrollbar-width: thin;
}

::-webkit-scrollbar {
  width: 11px;
  height: 11px;
}
::-webkit-scrollbar-track {
  background: var(--papier-sombre);
}
::-webkit-scrollbar-thumb {
  background: var(--graphite-3);
  border: 3px solid var(--papier-sombre);
  border-radius: 999px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--graphite-2);
}

:focus-visible {
  outline: 2px solid var(--rouge);
  outline-offset: 3px;
}

/* ------------------------------------------------------------------ *
 * Le papier plié : plis visibles + graticule de carte
 * ------------------------------------------------------------------ */
.feuille {
  position: relative;
  overflow-x: clip;
}

.feuille::before {
  content: '';
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background:
    repeating-linear-gradient(90deg,
      transparent 0 calc(25% - 1px),
      var(--pli) calc(25% - 1px) calc(25% + 1px),
      transparent calc(25% + 1px) 100%),
    repeating-linear-gradient(0deg,
      transparent 0 calc(20% - 1px),
      var(--graticule) calc(20% - 1px) calc(20% + 1px),
      transparent calc(20% + 1px) 100%),
    repeating-linear-gradient(90deg,
      transparent 0 47px,
      var(--graticule) 47px 48px,
      transparent 48px 100%),
    repeating-linear-gradient(0deg,
      transparent 0 47px,
      var(--graticule) 47px 48px,
      transparent 48px 100%);
  background-blend-mode: multiply;
  opacity: 0.9;
}

.feuille > * {
  position: relative;
  z-index: 1;
}

/* Grain du papier : évite que le fond se lise comme un aplat crème générique.
   Posé sur la couche de fond, sous les blocs — le papier est texturé, les
   cartes qui reposent dessus restent nettes. */
.feuille::after {
  content: '';
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: 0.38;
  mix-blend-mode: multiply;
  background-size: 180px 180px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='g'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.82' numOctaves='3' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='180' height='180' filter='url(%23g)' opacity='0.42'/%3E%3C/svg%3E");
}

/* ------------------------------------------------------------------ *
 * Typographie
 * ------------------------------------------------------------------ */
h1, h2, h3, h4 {
  font-family: var(--display);
  font-weight: 700;
  line-height: 0.95;
  letter-spacing: -0.015em;
  margin: 0;
  text-wrap: balance;
}

h1 {
  font-size: clamp(2.75rem, 1.6rem + 5.2vw, 6rem);
}
h2 {
  font-size: clamp(2rem, 1.3rem + 2.8vw, 3.5rem);
}
h3 {
  font-size: clamp(1.5rem, 1.1rem + 1.4vw, 2.25rem);
}

p {
  margin: 0;
  max-width: var(--mesure);
}

a {
  color: var(--bleu);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

/* Titre de structure réservé aux lecteurs d'écran — évite un saut h1 → h3
   dans la route, sans ajouter de bruit visuel. */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

/* ------------------------------------------------------------------ *
 * Cartouche & écusson — la signalétique du monde
 * ------------------------------------------------------------------ */
.cartouche {
  font-family: var(--display);
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--rouge);
  margin: 0;
}

.ecusson {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--display);
  font-weight: 700;
  font-size: 1rem;
  line-height: 1;
  color: var(--papier);
  background: var(--bleu);
  border-radius: 999px;
  width: var(--ecusson-taille, 2.15rem);
  height: var(--ecusson-taille, 2.15rem);
  flex: 0 0 auto;
  font-variant-numeric: tabular-nums;
}

.ecusson--depart {
  background: var(--rouge);
}
.ecusson--arrivee {
  background: var(--rouge);
  border-radius: 0.25rem;
  width: 2.4rem;
  height: 2.4rem;
}

.crayon {
  font-family: var(--crayon);
  font-size: clamp(1.15rem, 1rem + 0.6vw, 1.5rem);
  line-height: 1.2;
  color: var(--bleu-fonce);
  font-weight: 500;
}

/* ------------------------------------------------------------------ *
 * Boutons — plaques de signalisation
 * ------------------------------------------------------------------ */
.bouton {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--display);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  text-decoration: none;
  border: 0;
  cursor: pointer;
  padding: 0.85rem 1.6rem;
  background: var(--rouge);
  color: var(--papier);
  border-radius: 0.2rem;
  transition: background 120ms ease, transform 120ms ease;
}
.bouton:hover {
  background: var(--rouge-fonce);
  transform: translateY(-1px);
}
.bouton:active {
  transform: translateY(0);
}
.bouton[disabled] {
  opacity: 0.55;
  cursor: progress;
  transform: none;
}

.bouton--trait {
  background: transparent;
  color: var(--graphite);
  box-shadow: inset 0 0 0 2px var(--graphite);
}
.bouton--trait:hover {
  background: var(--graphite);
  color: var(--papier);
}

/* ------------------------------------------------------------------ *
 * Structure de page
 * ------------------------------------------------------------------ */
.enveloppe {
  width: min(1180px, 100% - 2 * var(--gouttiere));
  margin-inline: auto;
}

section {
  padding-block: clamp(3.5rem, 7vw, 6.5rem);
}

.entete-section {
  display: grid;
  gap: 1rem;
  max-width: 70ch;
  margin-bottom: clamp(2rem, 4vw, 3.25rem);
}

/* ------------------------------------------------------------------ *
 * HÉRO — le départ de l'itinéraire
 * ------------------------------------------------------------------ */
.heros {
  padding-top: clamp(2.5rem, 5vw, 4rem);
  padding-bottom: clamp(2rem, 4vw, 3rem);
}

.heros__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: clamp(2rem, 5vw, 4.5rem);
  align-items: start;
}

.heros__titre {
  margin-bottom: 1.25rem;
}

.heros__intro {
  font-size: clamp(1.1rem, 1rem + 0.5vw, 1.35rem);
  color: var(--graphite-2);
  line-height: 1.5;
  max-width: 42ch;
}

.heros__note {
  margin-top: 1.5rem;
  transform: rotate(-1.4deg);
  display: inline-block;
}

/* Le piquet de départ : le formulaire réel */
.depart {
  margin-top: clamp(2rem, 4vw, 3rem);
  padding: clamp(1.25rem, 2.5vw, 1.75rem);
  background: var(--papier-clair);
  box-shadow: inset 0 0 0 2px var(--graphite);
  position: relative;
  max-width: 30rem;
}

.depart::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 6px;
  background: var(--rouge);
}

.depart__legende {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 1rem;
}

.depart__legende span {
  font-family: var(--display);
  font-weight: 600;
  font-size: 0.9rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.champ {
  display: grid;
  gap: 0.35rem;
  margin-bottom: 0.9rem;
}

.champ label {
  font-family: var(--display);
  font-weight: 600;
  font-size: 0.85rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--graphite-2);
}

.champ input,
.champ textarea {
  font-family: var(--body);
  font-size: 1rem;
  color: var(--graphite);
  background: var(--papier);
  border: 0;
  box-shadow: inset 0 0 0 1.5px var(--graphite-3);
  padding: 0.65rem 0.75rem;
  border-radius: 0;
  width: 100%;
}
.champ textarea {
  resize: vertical;
  min-height: 4.5rem;
}
.champ input:focus,
.champ textarea:focus {
  outline: 2px solid var(--rouge);
  outline-offset: 0;
  box-shadow: inset 0 0 0 1.5px var(--graphite);
}
.champ input::placeholder,
.champ textarea::placeholder {
  color: var(--graphite-3);
  opacity: 1;
}

.retour {
  font-family: var(--display);
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-top: 0.85rem;
  min-height: 1.4em;
}
.retour[data-etat='ok'] {
  color: var(--bleu-fonce);
}
.retour[data-etat='erreur'] {
  color: var(--rouge);
}

.heros__legal {
  margin-top: 1.25rem;
  font-size: 0.9rem;
  color: var(--graphite-2);
  max-width: 40ch;
}

/* ------------------------------------------------------------------ *
 * La route (le cœur du monde)
 * ------------------------------------------------------------------ */
.route {
  position: relative;
  padding-top: 1rem;
}

/* La piste ne contient que les étapes : le rail et la flèche s'y accrochent et
   s'alignent sur le centre des écussons, sans dépendre du bloc des écartés. */
.route__piste {
  position: relative;
}

.route__rail {
  position: absolute;
  left: 0;
  right: 0;
  top: calc(var(--ecusson-centre) - 1.5px);
  height: 3px;
  background: var(--rouge);
  transform-origin: left center;
}

/* La flèche d'arrivée est hors du rail animé pour ne pas se déformer. */
.route__fleche {
  position: absolute;
  right: -2px;
  top: calc(var(--ecusson-centre) - 8px);
  width: 0;
  height: 0;
  border-top: 8px solid transparent;
  border-bottom: 8px solid transparent;
  border-left: 11px solid var(--rouge);
}

.route__etapes {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 0.5rem;
  position: relative;
}

.route__etape {
  display: grid;
  gap: 0.55rem;
  justify-items: start;
}

.route__etape h3 {
  font-size: 1.15rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  line-height: 1.05;
}

.route__etape p {
  font-size: 0.95rem;
  color: var(--graphite-2);
  line-height: 1.45;
  max-width: 22ch;
}

.route__kilo {
  font-family: var(--display);
  font-weight: 600;
  font-size: 0.8rem;
  letter-spacing: 0.16em;
  color: var(--graphite-3);
  text-transform: uppercase;
  font-variant-numeric: tabular-nums;
  transition: color 120ms ease;
}

.route__etape .ecusson {
  transition: background 140ms ease, transform 140ms ease;
}

.route__etape:hover .ecusson {
  background: var(--bleu-fonce);
  transform: translateY(-2px);
}

.route__etape:hover .route__kilo {
  color: var(--rouge);
}

/* Les profils écartés, restés au bord de la route */
.ecartes {
  margin-top: 2rem;
  display: grid;
  gap: 0.5rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--pli);
}

.ecartes__liste {
  display: grid;
  gap: 0.5rem;
}

.ecartes__legende {
  font-family: var(--display);
  font-weight: 600;
  font-size: 0.85rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--graphite-3);
}

.ecarte {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: baseline;
  gap: 0.75rem;
  font-size: 0.95rem;
  color: var(--graphite-2);
}

/* La rature est tracée par un pseudo-élément : seule la mention est barrée,
   le pourquoi et le kilométrage restent lisibles. */
.ecarte__nom {
  position: relative;
  display: inline-block;
}

.ecarte__nom::after {
  content: '';
  position: absolute;
  left: -3px;
  right: -3px;
  top: 0.58em;
  height: 2px;
  background: var(--rouge);
  transform-origin: left center;
}

.ecarte__pourquoi {
  font-family: var(--crayon);
  font-size: 1.15rem;
  color: var(--bleu-fonce);
  text-decoration: none;
  line-height: 1;
}

.ecarte__kilo {
  font-family: var(--display);
  font-weight: 600;
  font-size: 0.8rem;
  letter-spacing: 0.14em;
  color: var(--graphite-3);
  text-decoration: none;
}

/* ------------------------------------------------------------------ *
 * Étapes détaillées (section mécanique)
 * ------------------------------------------------------------------ */
.etapes {
  display: grid;
  gap: 0;
  border-top: 2px solid var(--graphite);
}

.etape {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) minmax(0, 1fr);
  gap: clamp(1rem, 3vw, 2.5rem);
  padding-block: clamp(1.5rem, 3vw, 2.25rem);
  border-bottom: 1px solid var(--pli);
  align-items: start;
}

.etape__num {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
}

.etape__num strong {
  font-family: var(--display);
  font-weight: 700;
  font-size: 2.75rem;
  line-height: 1;
  color: var(--rouge);
  font-variant-numeric: tabular-nums;
}

.etape__num span {
  font-family: var(--display);
  font-weight: 600;
  font-size: 0.8rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--graphite-3);
}

.etape h3 {
  font-size: clamp(1.4rem, 1.1rem + 1vw, 1.9rem);
  margin-bottom: 0.5rem;
}

.etape p {
  color: var(--graphite-2);
  font-size: 1rem;
}

.etape__sortie {
  border-left: 3px solid var(--bleu);
  padding-left: 1rem;
  font-size: 0.98rem;
  color: var(--graphite-2);
}

.etape__sortie strong {
  display: block;
  font-family: var(--display);
  font-weight: 600;
  font-size: 0.82rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--bleu-fonce);
  margin-bottom: 0.25rem;
}

/* ------------------------------------------------------------------ *
 * La preuve : le triage (démo synthétique)
 * ------------------------------------------------------------------ */
.preuve {
  background: var(--papier-sombre);
}

.preuve__grille {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: clamp(2rem, 5vw, 4rem);
  align-items: start;
}

.carnet {
  background: var(--papier-clair);
  box-shadow: inset 0 0 0 2px var(--graphite);
  padding: clamp(1.25rem, 2.5vw, 1.75rem);
}

.carnet__titre {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--pli);
}

.carnet__titre span {
  font-family: var(--display);
  font-weight: 600;
  font-size: 0.8rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--graphite-3);
}

.carnet__lignes {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.6rem;
}

.carnet__ligne {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.98rem;
}

.carnet__ligne[data-etat='ecarte'] {
  color: var(--graphite-2);
}
.carnet__ligne[data-etat='ecarte'] .carnet__nom {
  text-decoration: line-through;
  text-decoration-color: var(--rouge);
  text-decoration-thickness: 2px;
}
.carnet__ligne[data-etat='retenu'] .carnet__nom {
  font-weight: 600;
  color: var(--graphite);
}

.carnet__nom {
  line-height: 1.3;
}

.carnet__poste {
  display: block;
  font-size: 0.88rem;
  color: var(--graphite-3);
}

.carnet__sortie {
  font-family: var(--display);
  font-weight: 600;
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  white-space: nowrap;
}

.carnet__ligne[data-etat='ecarte'] .carnet__sortie {
  color: var(--rouge);
}
.carnet__ligne[data-etat='retenu'] .carnet__sortie {
  color: var(--bleu-fonce);
}

.carnet__pied {
  margin-top: 1.1rem;
  padding-top: 0.9rem;
  border-top: 1px solid var(--pli);
  font-size: 0.92rem;
  color: var(--graphite-2);
}

/* ------------------------------------------------------------------ *
 * Pourquoi ça tient
 * ------------------------------------------------------------------ */
.marque {
  font-family: var(--display);
  font-weight: 700;
  font-size: 1.1rem;
  line-height: 1;
  color: var(--bleu-fonce);
}
.marque--refus {
  color: var(--rouge);
}

/* ------------------------------------------------------------------ *
 * Tarifs
 * ------------------------------------------------------------------ */
.tarifs__grille {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(1rem, 2.5vw, 1.75rem);
  align-items: stretch;
}

.tarif {
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
  background: var(--papier-clair);
  box-shadow: inset 0 0 0 2px var(--graphite);
  padding: clamp(1.25rem, 2.5vw, 1.75rem);
}
.tarif--phare {
  box-shadow: inset 0 0 0 3px var(--rouge);
}
.tarif h3 {
  font-size: 1.6rem;
}
.tarif__etiquette {
  margin: 0;
  font-family: var(--display);
  font-weight: 600;
  font-size: 0.8rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--rouge);
}
.tarif__prix {
  margin: 0;
  color: var(--graphite-2);
}
.tarif__prix strong {
  font-family: var(--display);
  font-weight: 700;
  font-size: 2.6rem;
  line-height: 1;
  color: var(--graphite);
}
.tarif__pour {
  margin: 0;
  color: var(--graphite-2);
}
.tarif ul {
  list-style: none;
  margin: 0 0 0.5rem;
  padding: 0;
  display: grid;
  gap: 0.6rem;
  flex: 1;
}
.tarif li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.75rem;
  align-items: baseline;
  padding-bottom: 0.6rem;
  border-bottom: 1px solid var(--pli);
  color: var(--graphite-2);
}
.tarif .bouton {
  justify-content: center;
}
.tarifs__pied {
  margin-top: 1.5rem;
  max-width: 70ch;
  font-size: 0.92rem;
  color: var(--graphite-2);
}

/* ------------------------------------------------------------------ *
 * Clôture
 * ------------------------------------------------------------------ */
.cloture {
  background: var(--graphite);
  color: var(--papier);
  position: relative;
  overflow: hidden;
}

.cloture::before {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 3px;
  background: var(--rouge);
}

.cloture h2 {
  color: var(--papier);
  max-width: 20ch;
}

.cloture p {
  color: rgba(242, 236, 224, 0.82);
  margin-top: 1rem;
}

.cloture__grille {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: clamp(2rem, 5vw, 4rem);
  align-items: end;
}

.cloture .bouton {
  background: var(--rouge);
  color: var(--papier);
}
.cloture .bouton:hover {
  background: var(--rouge-fonce);
}

.cloture__signe {
  margin-top: 2.5rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--display);
  font-weight: 600;
  font-size: 0.85rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: rgba(242, 236, 224, 0.6);
}

.cloture__signe img {
  height: 22px;
  width: auto;
  filter: brightness(0) invert(1);
  opacity: 0.85;
}

.pied {
  padding-block: 2rem;
  font-size: 0.9rem;
  color: var(--graphite-2);
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: space-between;
  align-items: center;
}

.pied img {
  height: 26px;
  width: auto;
}

/* ------------------------------------------------------------------ *
 * Responsive
 * ------------------------------------------------------------------ */
@media (max-width: 900px) {
  .heros__grid,
  .preuve__grille,
  .tarifs__grille,
  .cloture__grille {
    grid-template-columns: minmax(0, 1fr);
  }

  /* La route devient un itinéraire vertical : le rail horizontal n'a plus de
     sens, mais la route continue — tracée par un segment entre chaque écusson. */
  .route__rail,
  .route__fleche {
    display: none;
  }

  .route__etapes {
    grid-template-columns: minmax(0, 1fr);
    gap: var(--route-gap, 2.5rem);
  }

  .route__etape {
    position: relative;
    grid-template-columns: auto minmax(0, 1fr);
    align-items: start;
    column-gap: 0.9rem;
  }

  .route__etape .ecusson {
    grid-column: 1;
    grid-row: 1 / -1;
    align-self: start;
  }

  .route__etape h3,
  .route__etape p,
  .route__etape .route__kilo {
    grid-column: 2;
  }

  /* Segment vers l'écusson suivant : il part du centre de l'écusson courant et
     se termine au centre du suivant (gap 2.5rem), quelle que soit la hauteur
     de la ligne. */
  .route__etape::before {
    content: '';
    position: absolute;
    left: calc(var(--ecusson-centre) - 1.5px);
    top: var(--ecusson-centre);
    bottom: calc(-1 * (var(--ecusson-centre) + var(--route-gap, 2.5rem)));
    width: 3px;
    background: var(--rouge);
  }

  .route__etape:last-child::before {
    display: none;
  }

  .etape {
    grid-template-columns: auto minmax(0, 1fr);
  }
  .etape__sortie {
    grid-column: 2;
  }
}

@media (max-width: 520px) {
  .route__etapes {
    --route-gap: 2rem;
  }
  .ecarte {
    grid-template-columns: 1fr auto;
  }
  .ecarte__pourquoi {
    grid-column: 1 / -1;
    grid-row: 2;
  }
}

/* ------------------------------------------------------------------ *
 * Le moment motion — UN seul.
 * La route se trace : le rail se dessine de gauche à droite, les
 * écussesons tombent en place au passage, puis les profils écartés
 * se font raturer à leur kilométrage.
 * Tout part d'un état déjà visible (ajout de .route--trace par JS en
 * rAF) : sans JS ou en mouvement réduit, la page reste complète.
 * ------------------------------------------------------------------ */
@media (prefers-reduced-motion: no-preference) {
  .route--trace .route__rail {
    animation: tracer-rail 1200ms cubic-bezier(0.16, 1, 0.3, 1) both;
  }

  .route--trace .route__fleche {
    animation: fleche 380ms cubic-bezier(0.16, 1, 0.3, 1) 1040ms both;
  }

  .route--trace .route__etape .ecusson {
    animation: tomber 640ms cubic-bezier(0.16, 1, 0.3, 1) both;
  }
  .route--trace .route__etape:nth-child(1) .ecusson { animation-delay: 60ms; }
  .route--trace .route__etape:nth-child(2) .ecusson { animation-delay: 270ms; }
  .route--trace .route__etape:nth-child(3) .ecusson { animation-delay: 520ms; }
  .route--trace .route__etape:nth-child(4) .ecusson { animation-delay: 800ms; }
  .route--trace .route__etape:nth-child(5) .ecusson { animation-delay: 1040ms; }

  .route--trace .route__etape h3,
  .route--trace .route__etape p,
  .route--trace .route__etape .route__kilo {
    animation: encre 620ms cubic-bezier(0.16, 1, 0.3, 1) both;
  }
  .route--trace .route__etape:nth-child(1) :is(h3, p, .route__kilo) { animation-delay: 140ms; }
  .route--trace .route__etape:nth-child(2) :is(h3, p, .route__kilo) { animation-delay: 350ms; }
  .route--trace .route__etape:nth-child(3) :is(h3, p, .route__kilo) { animation-delay: 600ms; }
  .route--trace .route__etape:nth-child(4) :is(h3, p, .route__kilo) { animation-delay: 880ms; }
  .route--trace .route__etape:nth-child(5) :is(h3, p, .route__kilo) { animation-delay: 1120ms; }

  .route--trace .ecarte__nom::after {
    animation: raturer 300ms cubic-bezier(0.16, 1, 0.3, 1) both;
  }
  .route--trace .ecartes__liste > .ecarte:nth-child(1) .ecarte__nom::after { animation-delay: 1240ms; }
  .route--trace .ecartes__liste > .ecarte:nth-child(2) .ecarte__nom::after { animation-delay: 1400ms; }
  .route--trace .ecartes__liste > .ecarte:nth-child(3) .ecarte__nom::after { animation-delay: 1560ms; }

  .route--trace .ecarte {
    animation: encre 520ms cubic-bezier(0.16, 1, 0.3, 1) both;
  }
  .route--trace .ecartes__liste > .ecarte:nth-child(1) { animation-delay: 1200ms; }
  .route--trace .ecartes__liste > .ecarte:nth-child(2) { animation-delay: 1360ms; }
  .route--trace .ecartes__liste > .ecarte:nth-child(3) { animation-delay: 1520ms; }

  .route--trace .ecartes__legende {
    animation: encre 520ms cubic-bezier(0.16, 1, 0.3, 1) 1160ms both;
  }
}

@keyframes tracer-rail {
  from { clip-path: inset(0 100% 0 0); }
  to   { clip-path: inset(0 0 0 0); }
}

@keyframes fleche {
  from { opacity: 0; transform: translateX(-10px); }
  to   { opacity: 1; transform: none; }
}

@keyframes tomber {
  from { opacity: 0; transform: scale(0.6) translateY(-7px); filter: blur(4px); }
  to   { opacity: 1; transform: none; filter: blur(0); }
}

@keyframes encre {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: none; }
}

@keyframes raturer {
  from { transform: scaleX(0); }
  to   { transform: scaleX(1); }
}

/* Version verticale du tracé : sur mobile la route descend, les segments
   reliant les écussons se dessinent à leur tour, décalés entre eux. */
@keyframes tracer-segment {
  from { clip-path: inset(0 0 100% 0); }
  to   { clip-path: inset(0 0 0 0); }
}

@media (prefers-reduced-motion: no-preference) and (max-width: 900px) {
  .route--trace .route__etape::before {
    animation: tracer-segment 240ms cubic-bezier(0.16, 1, 0.3, 1) both;
  }
  .route--trace .route__etape:nth-child(1)::before { animation-delay: 180ms; }
  .route--trace .route__etape:nth-child(2)::before { animation-delay: 420ms; }
  .route--trace .route__etape:nth-child(3)::before { animation-delay: 680ms; }
  .route--trace .route__etape:nth-child(4)::before { animation-delay: 940ms; }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  * {
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
  }
}

/* ------------------------------------------------------------------ *
 * En-tête de navigation sticky & Menu mobile hamburger
 * ------------------------------------------------------------------ */
.en-tete {
  position: sticky;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(242, 236, 224, 0.94);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--pli);
  transition: background-color 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.en-tete.est-scrolle {
  background: rgba(242, 236, 224, 0.98);
  box-shadow: 0 4px 20px rgba(46, 44, 40, 0.08);
  border-bottom-color: rgba(46, 44, 40, 0.15);
}

.en-tete__barre {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  gap: 1.5rem;
}

.en-tete__marque {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  text-decoration: none;
  color: var(--graphite);
  flex-shrink: 0;
}

.en-tete__marque img {
  width: 32px;
  height: 32px;
  display: block;
}

.en-tete__nom {
  font-family: var(--display);
  font-weight: 700;
  font-size: 1.35rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--graphite);
}

.en-tete__nav {
  display: flex;
  align-items: center;
}

.en-tete__liens {
  display: flex;
  align-items: center;
  gap: 1.75rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.en-tete__lien {
  font-family: var(--body);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--graphite-2);
  text-decoration: none;
  position: relative;
  transition: color 0.15s ease;
  padding: 0.25rem 0;
}

.en-tete__lien::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--rouge);
  transition: width 0.2s ease;
}

.en-tete__lien:hover {
  color: var(--rouge);
}

.en-tete__lien:hover::after {
  width: 100%;
}

.en-tete__actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.en-tete__connexion {
  font-family: var(--body);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--graphite-2);
  text-decoration: none;
  padding: 0.4rem 0.6rem;
  transition: color 0.15s ease;
}

.en-tete__connexion:hover {
  color: var(--rouge);
}

.bouton--compact {
  padding: 0.55rem 1.15rem;
  font-size: 0.9rem;
  letter-spacing: 0.08em;
}

/* Bouton hamburger mobile */
.en-tete__burger {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 42px;
  height: 42px;
  padding: 0;
  background: var(--papier-clair);
  border: 1px solid var(--pli);
  border-radius: 4px;
  cursor: pointer;
  z-index: 1002;
  transition: background-color 0.15s ease, border-color 0.15s ease;
}

.en-tete__burger:hover {
  background: var(--papier-sombre);
}

.burger-barre {
  display: block;
  width: 20px;
  height: 2px;
  background-color: var(--graphite);
  border-radius: 1px;
  transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.2s ease;
  transform-origin: center;
}

.en-tete__burger.est-actif .burger-barre:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.en-tete__burger.est-actif .burger-barre:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.en-tete__burger.est-actif .burger-barre:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Tiroir mobile */
.en-tete__tiroir {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--papier);
  border-bottom: 3px solid var(--rouge);
  box-shadow: 0 16px 36px rgba(46, 44, 40, 0.15);
  padding: 1.5rem 0;
  max-height: calc(100vh - 64px);
  overflow-y: auto;
  opacity: 0;
  transform: translateY(-8px);
  pointer-events: none;
  transition: opacity 0.2s ease, transform 0.2s ease;
}

.en-tete__tiroir.est-ouvert {
  display: block;
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.en-tete__tiroir-contenu {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.tiroir__liens {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.tiroir__lien {
  display: block;
  padding: 0.6rem 0.5rem;
  font-family: var(--display);
  font-size: 1.35rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--graphite);
  text-decoration: none;
  border-bottom: 1px solid var(--pli);
  transition: color 0.15s ease, padding-left 0.15s ease;
}

.tiroir__lien:hover,
.tiroir__lien:focus {
  color: var(--rouge);
  padding-left: 0.85rem;
}

.tiroir__separateur {
  height: 1px;
  background: var(--pli);
  margin: 0.25rem 0;
}

.tiroir__legales {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.tiroir__legales-titre {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--graphite-3);
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.tiroir__legales-liens {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem 1rem;
}

.tiroir__legales-liens a {
  font-size: 0.875rem;
  color: var(--graphite-2);
  text-decoration: none;
  transition: color 0.15s ease;
}

.tiroir__legales-liens a:hover {
  color: var(--bleu);
  text-decoration: underline;
}

.tiroir__actions {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-top: 0.5rem;
}

.tiroir__cta {
  width: 100%;
  justify-content: center;
  text-align: center;
}

.tiroir__connexion {
  width: 100%;
  justify-content: center;
  text-align: center;
}

/* Responsiveness pour l'en-tête */
@media (max-width: 900px) {
  .en-tete__nav,
  .en-tete__actions {
    display: none;
  }
  .en-tete__burger {
    display: flex;
  }
  .en-tete__tiroir {
    display: block;
    display: none;
  }
  .en-tete__tiroir.est-ouvert {
    display: block;
  }
}

/* Décalage pour le scroll sticky */
section[id],
form[id] {
  scroll-margin-top: 80px;
}