/* VigieChiro Companion - page d'accueil (echonuit.fr)
   Sobre, lisible en clair comme en sombre, sans dépendance externe. */

:root {
  --fond: #ffffff;
  --fond-doux: #f5f7f6;
  --texte: #1c2321;
  --texte-doux: #4a5754;
  --accent: #1e8449;          /* vert de la doc produit */
  --accent-fonce: #166437;
  --bordure: #dfe5e3;
  --ombre: 0 1px 3px rgba(0,0,0,.08), 0 8px 24px rgba(0,0,0,.06);
}

@media (prefers-color-scheme: dark) {
  :root {
    --fond: #14181a;
    --fond-doux: #1b2124;
    --texte: #e8eceb;
    --texte-doux: #a9b5b1;
    --accent: #3fbf75;
    --accent-fonce: #2fa662;
    --bordure: #2b3336;
    --ombre: 0 1px 3px rgba(0,0,0,.4), 0 8px 24px rgba(0,0,0,.3);
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--fond);
  color: var(--texte);
  font: 400 17px/1.65 system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; }
a { color: var(--accent); }

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

.hero {
  position: relative;
  isolation: isolate;
  min-height: 30rem;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 4rem 1.25rem 3.5rem;
  overflow: hidden;
}

.hero__fond {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: -2;
}

/* Voile sombre : le bandeau est une scène nocturne, le texte doit rester lisible
   quel que soit le thème du visiteur. */
.hero__voile {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(6,12,16,.55) 0%, rgba(6,12,16,.78) 100%);
  z-index: -1;
}

.hero__contenu { max-width: 46rem; color: #f4f8f7; }

.hero__icone {
  border-radius: 18px;
  box-shadow: 0 6px 24px rgba(0,0,0,.45);
  margin-bottom: 1.25rem;
}

.hero h1 {
  margin: 0 0 .6rem;
  font-size: clamp(2.1rem, 6vw, 3.2rem);
  line-height: 1.1;
  letter-spacing: -.02em;
}

.hero__accroche {
  margin: 0 auto 2rem;
  max-width: 34rem;
  font-size: clamp(1.05rem, 2.4vw, 1.3rem);
  color: #dfe9e6;
}

.hero__accroche strong { color: #fff; }

/* ---------- Téléchargement ---------- */

.telechargement { display: flex; flex-direction: column; align-items: center; gap: .9rem; }

.bouton {
  display: inline-block;
  padding: .95rem 2rem;
  border-radius: 10px;
  font-size: 1.08rem;
  font-weight: 600;
  text-decoration: none;
  transition: background-color .15s ease, transform .15s ease;
}

.bouton--primaire { background: var(--accent); color: #fff; box-shadow: var(--ombre); }
.bouton--primaire:hover { background: var(--accent-fonce); transform: translateY(-1px); }
.bouton:focus-visible { outline: 3px solid #fff; outline-offset: 3px; }

.telechargement__note {
  margin: 0;
  font-size: .92rem;
  color: #cfdcd8;
  display: flex;
  flex-wrap: wrap;
  gap: .5rem 1rem;
  justify-content: center;
}

.telechargement__note a { color: #bfe8d0; }

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

.section {
  max-width: 52rem;
  margin: 0 auto;
  padding: 3.5rem 1.25rem;
}

.section h2 {
  font-size: clamp(1.5rem, 3.4vw, 1.9rem);
  line-height: 1.25;
  margin: 0 0 1rem;
  letter-spacing: -.01em;
}

.section p { color: var(--texte-doux); margin: 0 0 1rem; }
.section--probleme { border-bottom: 1px solid var(--bordure); }

.parcours { margin: 2rem 0 0; text-align: center; }
.parcours img { width: 100%; max-width: 40rem; }

.capture { margin: 0; }

.capture img {
  width: 100%;
  border: 1px solid var(--bordure);
  border-radius: 8px;
  box-shadow: var(--ombre);
  display: block;
}

.capture figcaption {
  margin-top: .7rem;
  font-size: .9rem;
  color: var(--texte-doux);
  text-align: center;
}

/* ---------- Cartes ---------- */

.cartes {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
  gap: 1rem;
}

.carte {
  display: block;
  padding: 1.2rem 1.3rem;
  background: var(--fond-doux);
  border: 1px solid var(--bordure);
  border-radius: 10px;
  text-decoration: none;
  color: inherit;
  transition: border-color .15s ease, transform .15s ease;
}

.carte:hover { border-color: var(--accent); transform: translateY(-2px); }
.carte:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }
.carte h3 { margin: 0 0 .35rem; font-size: 1.05rem; color: var(--accent); }
.carte p { margin: 0; font-size: .93rem; color: var(--texte-doux); }

/* ---------- Pied ---------- */

.pied {
  border-top: 1px solid var(--bordure);
  padding: 2.5rem 1.25rem 3rem;
  text-align: center;
  color: var(--texte-doux);
  font-size: .92rem;
}

.pied p { max-width: 46rem; margin: 0 auto .6rem; }
.pied__mentions { font-size: .86rem; opacity: .85; }

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
}