@font-face {
  font-family: "IBM Plex Sans";
  src: url("fonts/ibm-plex-sans-var.woff2") format("woff2");
  font-weight: 100 700;
  font-style: normal;
  font-display: swap;
}

:root {
  --fond: #f4f5f4;
  --surface: #ffffff;
  --bordure: #e1e4e2;
  --texte: #1c2224;
  --secondaire: #5d6669;
  --accent: #3e6b73;
  --accent-fonce: #2c5258;
  --nuit: #16181b;
  --nuit-texte: #e4e2dd;
  --nuit-secondaire: #a9aeb0;
  --nuit-accent: #8cc0c8;
  --nuit-bordure: #30343a;
  --largeur: 1120px;
  --marge: clamp(20px, 5vw, 48px);
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; scroll-padding-top: 88px; }

@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}

body {
  margin: 0;
  background: var(--fond);
  color: var(--texte);
  font-family: "IBM Plex Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
  font-size: 1.125rem;
  line-height: 1.6;
  font-feature-settings: "tnum";
  -webkit-font-smoothing: antialiased;
  overflow-wrap: break-word;
}

h1, h2, h3, p, ol, ul { margin: 0; }
ol, ul { padding: 0; list-style: none; }
img, svg { display: block; max-width: 100%; }

a { color: var(--accent-fonce); text-underline-offset: 3px; }
a:hover { color: var(--texte); }

:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

.nuit :focus-visible { outline-color: var(--nuit-accent); }

.evitement {
  position: absolute;
  left: 12px;
  top: -80px;
  z-index: 20;
  padding: 12px 16px;
  background: var(--surface);
  border-radius: 8px;
}
.evitement:focus { top: 12px; }

.cadre {
  width: 100%;
  max-width: var(--largeur);
  margin-inline: auto;
  padding-inline: var(--marge);
}

/* Boutons */
.bouton {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  padding: 12px 26px;
  border: 0;
  border-radius: 8px;
  background: var(--accent);
  color: #fff;
  font: inherit;
  font-weight: 600;
  line-height: 1.2;
  text-decoration: none;
  cursor: pointer;
  transition: background-color .15s ease;
}
.bouton:hover { background: var(--accent-fonce); color: #fff; }
.bouton:disabled { background: var(--secondaire); cursor: default; }
.bouton--petit { min-height: 44px; padding: 8px 16px; font-size: 1rem; }

/* En-tête */
.entete {
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--fond);
  border-bottom: 1px solid var(--bordure);
}
.entete .cadre {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 68px;
  gap: 16px;
}
.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  color: var(--texte);
  font-size: 1.3rem;
  font-weight: 600;
  letter-spacing: -.01em;
  text-decoration: none;
}
.logo svg { width: 36px; height: 36px; }

/* Hero */
.hero { padding-block: clamp(56px, 10vw, 120px) clamp(56px, 8vw, 104px); }
.hero .cadre {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 40px;
  align-items: center;
}
.hero__marque { display: none; color: var(--texte); }
h1 {
  max-width: 17ch;
  font-size: clamp(2.5rem, 7vw, 4.5rem);
  font-weight: 600;
  line-height: 1.06;
  letter-spacing: -.025em;
}
.hero__texte {
  max-width: 34em;
  margin-top: 24px;
  color: var(--secondaire);
  font-size: clamp(1.15rem, 2vw, 1.375rem);
  line-height: 1.5;
}
.hero .bouton { margin-top: 32px; }
.hero__preuve { max-width: 34em; margin-top: 24px; font-size: 1rem; line-height: 1.5; color: var(--secondaire); }

/* Sections */
.section { padding-block: clamp(64px, 9vw, 112px); }
h2 {
  max-width: 22ch;
  font-size: clamp(1.875rem, 4.4vw, 3rem);
  font-weight: 600;
  line-height: 1.12;
  letter-spacing: -.02em;
}
.source {
  margin-top: 20px;
  color: var(--secondaire);
  font-size: .875rem;
  line-height: 1.5;
}
.source a { display: inline-block; padding-block: 2px; }
.hero__preuve a, .preuve__texte a, .avis a, .legal a { padding-block: 4px; }

/* La course */
.nuit { background: var(--nuit); color: var(--nuit-texte); }
.nuit a { color: var(--nuit-accent); }
.nuit a:hover { color: var(--nuit-texte); }
.nuit .source { color: var(--nuit-secondaire); }
.course__grille { display: grid; gap: 32px; }
.course__recit { display: grid; gap: 20px; margin-top: 28px; font-size: clamp(1.15rem, 2vw, 1.3rem); }
.course__chute { color: #fff; font-weight: 500; }
.chiffres { display: grid; gap: 28px; align-content: start; }
.chiffre { padding-top: 20px; border-top: 1px solid var(--nuit-bordure); }
.chiffre b {
  display: block;
  color: #fff;
  font-size: clamp(3rem, 7vw, 4.25rem);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -.02em;
}
.chiffre p { margin-top: 12px; }
.a-temps {
  margin-top: 40px;
  color: #fff;
  font-size: clamp(1.625rem, 3.4vw, 2.25rem);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -.015em;
}

/* Processus */
.intro { max-width: 36em; margin-top: 20px; font-size: clamp(1.15rem, 2vw, 1.3rem); }
.cartes {
  display: grid;
  gap: 12px;
  margin-top: 36px;
}
.carte {
  padding: 16px 20px;
  background: var(--surface);
  border: 1px solid var(--bordure);
  border-radius: 10px;
}
.carte h3 { font-size: 1.125rem; font-weight: 600; line-height: 1.3; }
.carte p { margin-top: 6px; color: var(--secondaire); font-size: 1.0625rem; line-height: 1.45; }
.liste-titre { margin-top: 36px; font-weight: 600; }
.liste-titre + .cartes { margin-top: 14px; }

/* Preuve */
.preuve { background: var(--surface); border-block: 1px solid var(--bordure); }
.preuve__texte { max-width: 36em; margin-top: 24px; }
.preuve__texte + .preuve__texte { margin-top: 12px; }
.flux {
  display: grid;
  gap: 8px;
  margin-top: 36px;
  counter-reset: flux;
}
.flux li {
  position: relative;
  padding: 20px 22px;
  background: var(--fond);
  border-radius: 10px;
  font-weight: 500;
  line-height: 1.35;
}
.preuve__pont { max-width: 36em; margin-top: 28px; }

/* Bio */
.bio { display: grid; gap: 28px; align-items: start; }
.bio__photo { width: 148px; height: 148px; object-fit: cover; border-radius: 10px; background: var(--bordure); }
.bio__nom { margin-top: 24px; font-weight: 600; }
.bio__texte { max-width: 36em; margin-top: 6px; }

/* Étapes */
.demarrage { padding-block: 0; }
.etapes { display: grid; gap: 28px; margin-top: 36px; counter-reset: etape; }
.etapes li {
  position: relative;
  padding-left: 52px;
  counter-increment: etape;
}
.etapes li::before {
  content: counter(etape);
  position: absolute;
  left: 0;
  top: 0;
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border: 1.5px solid var(--accent);
  border-radius: 50%;
  color: var(--accent-fonce);
  font-size: 1rem;
  font-weight: 600;
}

/* Formulaire */
.demande { padding-block: clamp(48px, 7vw, 72px) clamp(64px, 9vw, 112px); }
.formulaire {
  padding: clamp(24px, 5vw, 44px);
  background: var(--surface);
  border: 1px solid var(--bordure);
  border-radius: 14px;
}
.formulaire h2 { font-size: clamp(1.625rem, 3.4vw, 2.25rem); max-width: 24ch; }
.formulaire__aide { margin-top: 14px; color: var(--secondaire); line-height: 1.5; }
.champ [aria-invalid="true"] { border: 2px solid #8a2f22; }
.champs { display: grid; gap: 20px; margin-top: 28px; }
.champ label { display: block; margin-bottom: 6px; font-weight: 500; line-height: 1.35; }
.champ input, .champ textarea {
  display: block;
  width: 100%;
  min-height: 52px;
  padding: 12px 14px;
  background: var(--surface);
  border: 1px solid #848c8f;
  border-radius: 8px;
  color: var(--texte);
  font: inherit;
}
.champ textarea { min-height: 128px; resize: vertical; }
.formulaire .bouton { width: 100%; margin-top: 24px; }
.avis { margin-top: 16px; color: var(--secondaire); font-size: .875rem; line-height: 1.5; }
.confirmation {
  margin-top: 24px;
  padding: 18px 20px;
  background: #e2eeef;
  border-radius: 8px;
  color: var(--accent-fonce);
  font-weight: 500;
}
.piegeage { position: absolute; left: -9999px; }

/* Pied */
.pied { padding-block: 32px; border-top: 1px solid var(--bordure); color: var(--secondaire); font-size: 1rem; }
.pied .cadre { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 8px 24px; }
.pied a { display: inline-flex; align-items: center; min-height: 44px; color: var(--secondaire); }
.pied a:hover { color: var(--texte); }

/* Page légale */
.legal { padding-block: clamp(48px, 7vw, 80px); }
.legal h1 { font-size: clamp(2rem, 5vw, 3rem); max-width: 22ch; }
.legal h2 { margin-top: 40px; font-size: 1.375rem; max-width: none; letter-spacing: -.01em; }
.legal p, .legal ul { max-width: 40em; margin-top: 12px; }
.legal ul { padding-left: 1.2em; list-style: disc; }

@media (min-width: 720px) {
  .carte { padding: 22px 24px; }
  .cartes { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .flux { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 32px; }
  .flux li:not(:last-child)::after {
    content: "→";
    position: absolute;
    right: -24px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--secondaire);
    line-height: 1;
  }
  .bio { grid-template-columns: 200px minmax(0, 1fr); gap: 48px; }
  .bio__photo { width: 200px; height: 200px; }
  .bio__nom { margin-top: 12px; }
  .etapes { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 32px; }
}

@media (min-width: 1000px) {
  .hero .cadre { grid-template-columns: minmax(0, 1fr) 280px; }
  .hero__marque { display: block; width: 280px; height: 280px; }
  .course__grille { grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr); gap: 72px; }
  .cartes { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .formulaire { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.3fr); gap: 56px; }
  .champs { margin-top: 0; }
}