:root {
  --nuit: #08100c;
  --nuit-2: #0c1712;
  --carte: #12201a;
  --carte-2: #172a21;
  --bord: rgba(233, 245, 236, .1);
  --bord-fort: rgba(233, 245, 236, .22);
  --texte: #e8f0ea;
  --texte-2: #a6b4aa;
  --vert: #36b073;
  --vert-fonce: #1f7a4d;
  --menthe: #e9f5ec;
  --braise: #ff8a3d;
  --braise-clair: #ffb27a;
  --rayon: 14px;
  --largeur: 1160px;
  color-scheme: dark;
}

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

html { scroll-behavior: smooth; scroll-padding-top: 72px; }

body {
  margin: 0;
  background: var(--nuit);
  color: var(--texte);
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, "Helvetica Neue", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

img, video { display: block; max-width: 100%; height: auto; }

a { color: inherit; }

h1, h2, h3 { margin: 0; line-height: 1.08; letter-spacing: -.025em; }
h2 { font-size: clamp(1.9rem, 4.2vw, 3rem); font-weight: 700; margin-bottom: .6em; }
h3 { font-size: 1.15rem; font-weight: 650; letter-spacing: -.01em; }
p { margin: 0; }

.conteneur { width: min(var(--largeur), 100% - 32px); margin-inline: auto; }
.conteneur.etroit { width: min(760px, 100% - 32px); }

.saut {
  position: absolute;
  left: 16px;
  top: -60px;
  background: var(--braise);
  color: #1a0d03;
  padding: 8px 14px;
  border-radius: 8px;
  z-index: 100;
}
.saut:focus { top: 12px; }


/* ---- Logo, boutons ---------------------------------------------------------------------- */

.logo {
  font-size: 1.3rem;
  font-weight: 750;
  letter-spacing: -.02em;
  text-decoration: none;
  white-space: nowrap;
}
.logo .leger { font-weight: 400; }

.bouton {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 48px;
  padding: 0 22px;
  border-radius: 999px;
  border: 1px solid var(--braise);
  background: var(--braise);
  color: #1d0e03;
  font: inherit;
  font-weight: 650;
  text-decoration: none;
  cursor: pointer;
  transition: transform .15s ease, background .15s ease, border-color .15s ease;
}
.bouton:hover { background: var(--braise-clair); border-color: var(--braise-clair); }
.bouton:active { transform: scale(.98); }
.bouton.secondaire { background: transparent; color: var(--texte); border-color: var(--bord-fort); }
.bouton.secondaire:hover { border-color: var(--texte); background: rgba(233, 245, 236, .06); }
.bouton.petit { min-height: 40px; padding: 0 16px; font-size: .92rem; }

:focus-visible { outline: 2px solid var(--braise); outline-offset: 3px; border-radius: 6px; }

/* ---- En-tête ----------------------------------------------------------------------------- */

.entete {
  position: fixed;
  inset: 0 0 auto;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  height: 64px;
  padding: 0 max(16px, (100% - var(--largeur)) / 2);
  transition: background .25s ease, border-color .25s ease;
  border-bottom: 1px solid transparent;
}
.entete.defile {
  background: rgba(8, 16, 12, .82);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom-color: var(--bord);
}

.menu { display: flex; align-items: center; gap: 4px; }
.menu a:not(.bouton) {
  padding: 8px 12px;
  border-radius: 999px;
  text-decoration: none;
  color: var(--texte-2);
  font-size: .95rem;
}
.menu a:not(.bouton):hover { color: var(--texte); background: rgba(233, 245, 236, .06); }
.menu .langue { border: 1px solid var(--bord); margin: 0 6px; }
.menu-bouton { display: none; }

@media (max-width: 900px) {
  .menu-bouton {
    display: inline-flex;
    font: inherit;
    font-weight: 600;
    color: var(--texte);
    background: rgba(8, 16, 12, .6);
    border: 1px solid var(--bord-fort);
    border-radius: 999px;
    padding: 8px 16px;
    cursor: pointer;
  }
  .menu {
    position: fixed;
    inset: 64px 0 auto;
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    padding: 12px 16px 20px;
    background: rgba(8, 16, 12, .97);
    border-bottom: 1px solid var(--bord);
    transform: translateY(-8px);
    opacity: 0;
    visibility: hidden;
    transition: opacity .2s ease, transform .2s ease, visibility .2s;
  }
  .menu.ouvert { opacity: 1; transform: none; visibility: visible; }
  .entete:has(.menu.ouvert) { background: rgba(8, 16, 12, .97); border-bottom-color: var(--bord); }
  .menu a:not(.bouton) { padding: 12px; font-size: 1.05rem; }
  .menu .langue { margin: 6px 0; text-align: center; }
  .menu .bouton { margin-top: 6px; }
}

/* ---- Hero -------------------------------------------------------------------------------- */

.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: flex-end;
  padding: 120px 0 56px;
  overflow: hidden;
}
.hero-image {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 72% 45%;
}
.hero-voile {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(8, 16, 12, .92) 0%, rgba(8, 16, 12, .7) 38%, rgba(8, 16, 12, .1) 70%),
    linear-gradient(0deg, var(--nuit) 0%, rgba(8, 16, 12, 0) 35%);
}
.hero-contenu { position: relative; }
.surtitre {
  color: var(--braise);
  font-weight: 650;
  font-size: .9rem;
  letter-spacing: .08em;
  text-transform: uppercase;
  margin-bottom: 18px;
}
.hero h1 {
  font-size: clamp(2.6rem, 6.6vw, 5.2rem);
  font-weight: 750;
  letter-spacing: -.035em;
  max-width: 13ch;
}
.hero-texte {
  margin-top: 22px;
  max-width: 34rem;
  font-size: clamp(1.05rem, 1.6vw, 1.22rem);
  color: #cfdbd2;
}
.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 32px; }

.chiffres {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
  margin: 56px 0 0;
  padding-top: 24px;
  border-top: 1px solid var(--bord-fort);
  max-width: 880px;
}
.chiffres dt { font-size: clamp(1.6rem, 3vw, 2.3rem); font-weight: 750; letter-spacing: -.03em; color: var(--menthe); }
.chiffres dd { margin: 4px 0 0; color: var(--texte-2); font-size: .92rem; line-height: 1.45; }

@media (min-width: 701px) and (max-width: 1100px) {
  /* Écran moyen : on décale le cadrage et on resserre le texte pour qu'il ne passe pas sur le capteur. */
  .hero-image { object-position: 64% 45%; }
  .hero h1 { font-size: clamp(2.6rem, 5.6vw, 5.2rem); }
  .hero-texte { max-width: 27rem; }
}

@media (max-width: 700px), (orientation: portrait) and (max-width: 1100px) {
  /* Téléphone et tablette en portrait : l'image devient un bandeau en haut et le texte passe
     en dessous, pour que le capteur reste entier. La hauteur suit la largeur (même cadrage sur
     tous les téléphones) mais reste plafonnée pour que le titre soit visible sur tablette. */
  .hero { --bandeau: min(120vw, 62svh); min-height: auto; padding-top: 96px; }
  .hero-image, .hero-voile { inset: 0 0 auto; height: var(--bandeau); }
  .hero-image { object-position: 88% 50%; }
  .hero-voile {
    background:
      linear-gradient(0deg, var(--nuit) 0%, rgba(8, 16, 12, 0) 32%),
      linear-gradient(180deg, rgba(8, 16, 12, .6) 0%, rgba(8, 16, 12, 0) 24%);
  }
  .hero-contenu { padding-top: calc(var(--bandeau) * .92 - 96px); }
}

@media (max-width: 700px) {
  .chiffres { grid-template-columns: 1fr; gap: 14px; margin-top: 40px; }
  .chiffres div { display: flex; align-items: baseline; gap: 14px; }
  .chiffres dt { min-width: 5.5ch; }
}

/* ---- Sections ---------------------------------------------------------------------------- */

.section { padding: clamp(4.5rem, 10vw, 8rem) 0; }
.section.sombre { background: var(--nuit-2); border-block: 1px solid var(--bord); }
.chapo { font-size: clamp(1.05rem, 1.5vw, 1.2rem); color: var(--texte-2); max-width: 46rem; }

.grille-3 { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; margin-top: 48px; }
.carte {
  background: var(--carte);
  border: 1px solid var(--bord);
  border-radius: var(--rayon);
  padding: 26px;
}
.carte h3 { margin-bottom: 10px; }
.carte p { color: var(--texte-2); }

.etapes { list-style: none; margin: 40px 0 0; padding: 0; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.etapes li {
  position: relative;
  background: var(--carte);
  border: 1px solid var(--bord);
  border-radius: var(--rayon);
  padding: 28px;
}
.etapes .icone { width: 44px; height: 44px; color: var(--braise); margin-bottom: 22px; }
.etapes .numero { position: absolute; top: 26px; right: 28px; color: var(--texte-2); font-variant-numeric: tabular-nums; font-size: .9rem; }
.etapes h3 { font-size: 1.4rem; margin-bottom: 10px; }
.etapes p { color: var(--texte-2); }

@media (max-width: 860px) {
  .grille-3, .etapes { grid-template-columns: 1fr; }
}

/* ---- Démo -------------------------------------------------------------------------------- */

.demo { margin: 40px 0 0; }
.demo canvas {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  border-radius: var(--rayon) var(--rayon) 0 0;
  border: 1px solid var(--bord);
  border-bottom: 0;
  background: #0f1d15;
  cursor: crosshair;
  touch-action: manipulation;
}
.demo-barre {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  padding: 14px 16px;
  background: var(--carte);
  border: 1px solid var(--bord);
  border-radius: 0 0 var(--rayon) var(--rayon);
}
.demo-etat { font-weight: 600; min-height: 1.6em; }
.demo-etat.alerte { color: var(--braise); }
.demo-boutons { display: flex; gap: 8px; }
.demo figcaption, .video figcaption, .graphique figcaption, .galerie figcaption {
  margin-top: 12px;
  color: var(--texte-2);
  font-size: .9rem;
}

@media (max-width: 700px) {
  .demo canvas { aspect-ratio: 4 / 5; }
}

/* ---- Capteur ----------------------------------------------------------------------------- */

.capteur-grille { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr); gap: 48px; align-items: start; }
.specs { margin: 32px 0 0; border-top: 1px solid var(--bord); }
.specs div { display: grid; grid-template-columns: 11rem minmax(0, 1fr); gap: 16px; padding: 14px 0; border-bottom: 1px solid var(--bord); }
.specs dt { color: var(--texte-2); font-size: .95rem; }
.specs dd { margin: 0; }
.video { margin: 0; }
.video video { width: 100%; border-radius: var(--rayon); border: 1px solid var(--bord); background: #9c9e9f; aspect-ratio: 16 / 9; object-fit: cover; }

.vue3d {
  display: grid;
  grid-template-columns: minmax(0, .8fr) minmax(0, 1.6fr);
  gap: 32px;
  align-items: center;
  margin-top: 72px;
  padding: 28px;
  background: var(--carte);
  border: 1px solid var(--bord);
  border-radius: calc(var(--rayon) + 6px);
}
.vue3d h3 { font-size: 1.6rem; margin-bottom: 10px; }
.vue3d p { color: var(--texte-2); margin-bottom: 22px; }
model-viewer {
  width: 100%;
  height: 480px;
  border-radius: var(--rayon);
  background: radial-gradient(circle at 50% 45%, #f4f7f3, #cfd8d1);
  --poster-color: transparent;
}

.galerie { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 16px; margin-top: 48px; }
.galerie figure { margin: 0; }
.galerie img { width: 100%; aspect-ratio: 3 / 2; object-fit: cover; border-radius: var(--rayon); border: 1px solid var(--bord); }

@media (max-width: 900px) {
  .capteur-grille, .vue3d { grid-template-columns: 1fr; }
  .specs div { grid-template-columns: 1fr; gap: 2px; }
  model-viewer { height: 380px; }
  .vue3d { padding: 18px; }
}

/* ---- Résultats --------------------------------------------------------------------------- */

.resultats-grille { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 24px; margin-top: 40px; align-items: start; }
.graphique { margin: 0; background: var(--carte); border: 1px solid var(--bord); border-radius: var(--rayon); padding: 26px; }
.graphique h3 { margin-bottom: 24px; }
.barres { display: grid; gap: 14px; }
.barre { display: grid; grid-template-columns: 4rem minmax(0, 1fr) 4.5rem; align-items: center; gap: 12px; }
.barre-etiquette { color: var(--texte-2); font-variant-numeric: tabular-nums; }
.barre-piste { height: 14px; background: rgba(233, 245, 236, .07); border-radius: 999px; overflow: hidden; }
.barre-valeur {
  display: block;
  height: 100%;
  width: calc(var(--part) * 100%);
  background: var(--braise);
  border-radius: 999px;
  transform-origin: left;
  transition: transform 1s cubic-bezier(.2, .7, .2, 1);
}
.barre-nombre { text-align: right; font-weight: 650; font-variant-numeric: tabular-nums; }
.cartes-chiffres { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.cartes-chiffres strong { display: block; font-size: 2rem; letter-spacing: -.03em; color: var(--menthe); margin-bottom: 6px; }

@media (max-width: 900px) {
  .resultats-grille { grid-template-columns: 1fr; }
}
@media (max-width: 520px) {
  .cartes-chiffres { grid-template-columns: 1fr; }
}

/* ---- Feuille de route -------------------------------------------------------------------- */

.frise { list-style: none; margin: 40px 0 0; padding: 0; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.frise li { background: var(--carte); border: 1px solid var(--bord); border-radius: var(--rayon); padding: 22px 24px; }
.frise h3 { margin: 12px 0 6px; }
.frise p { color: var(--texte-2); font-size: .95rem; }
.statut {
  display: inline-block;
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: .06em;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: 999px;
  border: 1px solid currentColor;
}
.frise .done .statut { color: var(--vert); }
.frise .next .statut { color: var(--braise); }
.frise .planned .statut { color: var(--texte-2); }
.frise .next { border-color: rgba(255, 138, 61, .45); }

@media (max-width: 900px) { .frise { grid-template-columns: 1fr; } }

/* ---- Pied de page ------------------------------------------------------------------------ */

.pied { padding: 40px 0; }
.pied-grille { display: flex; justify-content: space-between; align-items: flex-end; gap: 16px; flex-wrap: wrap; }
.pied p { color: var(--texte-2); font-size: .92rem; margin-top: 6px; }

.introuvable { min-height: 80vh; display: flex; align-items: center; padding-top: 120px; }
.introuvable h1 { font-size: clamp(2.4rem, 6vw, 4rem); margin-bottom: 16px; }

/* ---- Apparitions au défilement ----------------------------------------------------------- */

.js .apparait { opacity: 0; transform: translateY(18px); transition: opacity .7s ease, transform .7s cubic-bezier(.2, .7, .2, 1); }
.js .apparait.visible { opacity: 1; transform: none; }
.js .graphique:not(.visible) .barre-valeur { transform: scaleX(0); }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .js .apparait { opacity: 1; transform: none; transition: none; }
  .barre-valeur { transition: none; }
}