/* =========================================================
   clim-reversible-prix.fr — feuille de style
   Mobile-first. Pas de framework. Pas de webfont externe
   (police système = chargement instantané, cohérence OS).
   ========================================================= */

:root {
  --froid: #0b6e99;
  --froid-clair: #e6f3f8;
  --chaud: #d9631e;
  --chaud-clair: #fdf0e6;
  --encre: #1c2530;
  --encre-doux: #4a5568;
  --fond: #ffffff;
  --fond-alt: #f6f8f9;
  --bordure: #e2e8ec;
  --succes: #1e7d4f;
  --rayon: 10px;
  --rayon-petit: 6px;
  --ombre: 0 2px 10px rgba(28, 37, 48, 0.08);
  --ombre-forte: 0 8px 28px rgba(28, 37, 48, 0.14);
  --marge-page: clamp(1.25rem, 5vw, 2rem);
  --largeur-max: 1120px;
  font-size: 17px;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--encre);
  background: var(--fond);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  accent-color: var(--froid);
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--froid); text-decoration-thickness: 1px; }
a:hover { color: var(--chaud); }

h1, h2, h3, h4 { line-height: 1.25; font-weight: 700; color: var(--encre); }
h1 { font-size: 1.75rem; margin: 0 0 .6rem; }
h2 { font-size: 1.4rem; margin: 2rem 0 .8rem; }
h3 { font-size: 1.15rem; margin: 1.4rem 0 .5rem; }
p { margin: 0 0 1rem; }
ul, ol { padding-left: 1.3rem; margin: 0 0 1rem; }
li { margin-bottom: .35rem; }

.container {
  max-width: var(--largeur-max);
  margin: 0 auto;
  padding: 0 var(--marge-page);
}

/* ---------- Bandeau d'alerte / fraicheur contenu ---------- */
.maj-badge {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  font-size: .8rem;
  color: var(--encre-doux);
  background: var(--fond-alt);
  border: 1px solid var(--bordure);
  border-radius: 999px;
  padding: .25rem .7rem;
  margin-bottom: 1rem;
}
.maj-badge strong { color: var(--encre); }

/* ---------- En-tête / navigation ---------- */
.site-header {
  border-bottom: 1px solid var(--bordure);
  position: sticky;
  top: 0;
  background: rgba(255,255,255,.96);
  backdrop-filter: saturate(180%) blur(6px);
  z-index: 50;
}
.header-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: .75rem;
  padding: .75rem var(--marge-page);
  max-width: var(--largeur-max);
  margin: 0 auto;
}
.logo {
  font-weight: 800;
  font-size: 1.02rem;
  color: var(--encre);
  text-decoration: none;
  white-space: nowrap;
  letter-spacing: -.01em;
}
.logo span.froid { color: var(--froid); }
.logo span.chaud { color: var(--chaud); }

.nav-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border: 1px solid var(--bordure);
  border-radius: var(--rayon-petit);
  background: var(--fond);
  cursor: pointer;
}
.nav-toggle svg { width: 22px; height: 22px; }

.main-nav {
  display: none;
  border-top: 1px solid var(--bordure);
  background: var(--fond);
}
.main-nav.ouvert { display: block; }
.main-nav ul {
  list-style: none;
  margin: 0;
  padding: .5rem var(--marge-page) 1rem;
  display: flex;
  flex-direction: column;
}
.main-nav a {
  display: block;
  padding: .6rem .2rem;
  color: var(--encre);
  text-decoration: none;
  border-bottom: 1px solid var(--fond-alt);
  font-size: .95rem;
}
.header-cta {
  display: none;
}

@media (min-width: 880px) {
  .nav-toggle { display: none; }
  .main-nav { display: block !important; border-top: none; }
  .main-nav ul { flex-direction: row; padding: 0; gap: 1.4rem; align-items: center; }
  .main-nav a { border-bottom: none; padding: .3rem 0; }
  .header-bar { padding: .9rem var(--marge-page); }
  .header-cta {
    display: inline-block;
    background: var(--chaud);
    color: #fff;
    padding: .6rem 1.1rem;
    border-radius: var(--rayon-petit);
    text-decoration: none;
    font-weight: 600;
    font-size: .9rem;
    white-space: nowrap;
  }
  .header-cta:hover { background: #b8501a; color: #fff; }
}

/* ---------- Fil d'ariane ---------- */
.fil-ariane {
  font-size: .82rem;
  color: var(--encre-doux);
  margin: .9rem 0 0;
}
.fil-ariane a { color: var(--encre-doux); text-decoration: none; }
.fil-ariane a:hover { color: var(--froid); }

/* ---------- Héros de page ---------- */
.hero {
  padding: 1.2rem 0 1.6rem;
}
.hero .chapo {
  font-size: 1.05rem;
  color: var(--encre-doux);
  max-width: 62ch;
}

/* ---------- Contenu article ---------- */
.article {
  padding: .5rem 0 2.5rem;
}
.article-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}
@media (min-width: 960px) {
  .article-grid { grid-template-columns: minmax(0,1fr) 300px; }
}

.corps p, .corps li { color: var(--encre); }
.corps table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0 1.5rem;
  font-size: .92rem;
}
.corps caption {
  text-align: left;
  font-size: .8rem;
  color: var(--encre-doux);
  margin-bottom: .4rem;
}
.corps th, .corps td {
  border: 1px solid var(--bordure);
  padding: .55rem .6rem;
  text-align: left;
}
.corps th { background: var(--fond-alt); font-weight: 700; }
.corps tbody tr:nth-child(even) { background: #fbfcfd; }

.encadre {
  background: var(--froid-clair);
  border-left: 4px solid var(--froid);
  border-radius: var(--rayon-petit);
  padding: 1rem 1.1rem;
  margin: 1.3rem 0;
  font-size: .95rem;
}
.encadre.avertissement {
  background: var(--chaud-clair);
  border-left-color: var(--chaud);
}
.encadre h4 { margin-top: 0; }

/* ---------- Bloc auteur / E-E-A-T ---------- */
.bloc-auteur {
  display: flex;
  gap: .8rem;
  align-items: flex-start;
  background: var(--fond-alt);
  border: 1px solid var(--bordure);
  border-radius: var(--rayon);
  padding: .9rem 1rem;
  margin: 1.5rem 0;
  font-size: .88rem;
}
.bloc-auteur .avatar {
  width: 44px; height: 44px; border-radius: 50%;
  background: var(--froid);
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: .95rem;
  flex-shrink: 0;
}
.bloc-auteur strong { display: block; color: var(--encre); }

/* ---------- CTA devis ---------- */
.cta-devis {
  background: linear-gradient(135deg, var(--froid) 0%, #084a67 100%);
  color: #fff;
  border-radius: var(--rayon);
  padding: 1.3rem 1.2rem;
  margin: 1.8rem 0;
  box-shadow: var(--ombre);
}
.cta-devis h3 { color: #fff; margin-top: 0; }
.cta-devis p { color: #e7f1f6; font-size: .93rem; }
.bouton {
  display: inline-block;
  background: var(--chaud);
  color: #fff;
  font-weight: 700;
  text-decoration: none;
  padding: .75rem 1.3rem;
  border-radius: var(--rayon-petit);
  font-size: .95rem;
  border: none;
  cursor: pointer;
}
.bouton:hover { background: #b8501a; color: #fff; }
.bouton.secondaire {
  background: transparent;
  color: #fff;
  border: 1.5px solid rgba(255,255,255,.6);
}
.bouton.secondaire:hover { background: rgba(255,255,255,.12); color: #fff; }

/* ---------- Cartes marques / grille ---------- */
.grille-cartes {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  margin: 1.5rem 0;
}
@media (min-width: 640px) { .grille-cartes { grid-template-columns: 1fr 1fr; } }
@media (min-width: 960px) { .grille-cartes { grid-template-columns: repeat(3, 1fr); } }

.carte {
  border: 1px solid var(--bordure);
  border-radius: var(--rayon);
  padding: 1.1rem;
  text-decoration: none;
  color: var(--encre);
  background: var(--fond);
  transition: box-shadow .15s ease, transform .15s ease;
}
.carte:hover { box-shadow: var(--ombre-forte); transform: translateY(-2px); color: var(--encre); }
.carte .prix-tag {
  display: inline-block;
  font-size: .78rem;
  font-weight: 700;
  color: var(--froid);
  background: var(--froid-clair);
  padding: .2rem .55rem;
  border-radius: 999px;
  margin-bottom: .5rem;
}
.carte h3 { margin: .2rem 0 .4rem; font-size: 1rem; }
.carte p { font-size: .85rem; color: var(--encre-doux); margin-bottom: 0; }

/* ---------- FAQ ---------- */
.faq-item {
  border-bottom: 1px solid var(--bordure);
  padding: .9rem 0;
}
.faq-item summary {
  cursor: pointer;
  font-weight: 700;
  font-size: .98rem;
  list-style: none;
  display: flex;
  justify-content: space-between;
  gap: .6rem;
  align-items: center;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+";
  font-size: 1.3rem;
  color: var(--froid);
  flex-shrink: 0;
}
.faq-item[open] summary::after { content: "\2212"; }
.faq-item .reponse { margin-top: .6rem; color: var(--encre-doux); font-size: .93rem; }

/* ---------- Outils interactifs (simulateurs) ---------- */
.outil {
  background: var(--fond-alt);
  border: 1px solid var(--bordure);
  border-radius: var(--rayon);
  padding: 1.2rem;
  margin: 1.5rem 0 2rem;
}
.outil h3 { margin-top: 0; }
.champ { margin-bottom: 1rem; }
.champ label { display: block; font-weight: 600; font-size: .88rem; margin-bottom: .35rem; }
.champ select, .champ input {
  width: 100%;
  padding: .6rem .7rem;
  border: 1px solid var(--bordure);
  border-radius: var(--rayon-petit);
  font-size: .95rem;
  background: #fff;
  color: var(--encre);
}
.champ .plage { display: flex; align-items: center; gap: .9rem; }
.champ .plage output { font-weight: 700; color: var(--froid); min-width: 4.2em; text-align: right; }
input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 6px;
  border-radius: 999px;
  background: var(--bordure);
  outline: none;
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--froid);
  border: 3px solid #fff;
  box-shadow: 0 1px 4px rgba(28,37,48,.3);
  cursor: pointer;
}
input[type="range"]::-moz-range-thumb {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--froid);
  border: 3px solid #fff;
  box-shadow: 0 1px 4px rgba(28,37,48,.3);
  cursor: pointer;
}
.resultat-outil {
  margin-top: 1.1rem;
  background: #fff;
  border: 1.5px solid var(--froid);
  border-radius: var(--rayon-petit);
  padding: 1rem;
}
.resultat-outil .fourchette {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--froid);
}
.resultat-outil .detail { font-size: .82rem; color: var(--encre-doux); }
.outil .note-legale { font-size: .75rem; color: var(--encre-doux); margin-top: .8rem; }

/* ---------- Formulaire devis ---------- */
.form-devis {
  background: var(--fond-alt);
  border: 1px solid var(--bordure);
  border-radius: var(--rayon);
  padding: 1.3rem;
  margin: 1.5rem 0;
}
.form-devis .ligne { margin-bottom: 1rem; }
.form-devis label { display: block; font-weight: 600; font-size: .88rem; margin-bottom: .35rem; }
.form-devis input, .form-devis select, .form-devis textarea {
  width: 100%;
  padding: .65rem .75rem;
  border: 1px solid var(--bordure);
  border-radius: var(--rayon-petit);
  font-size: .95rem;
  font-family: inherit;
}
.champ-piege { position: absolute; left: -9999px; top: -9999px; }
.form-devis .rgpd { font-size: .78rem; color: var(--encre-doux); }
.msg-etat { margin-top: 1rem; padding: .8rem; border-radius: var(--rayon-petit); font-size: .9rem; display: none; }
.msg-etat.visible { display: block; }
.msg-etat.succes { background: #e7f6ee; color: var(--succes); border: 1px solid #bfe4cd; }
.msg-etat.erreur { background: #fdecec; color: #a3271e; border: 1px solid #f3c6c2; }

/* ---------- Sommaire latéral ---------- */
.sommaire {
  border: 1px solid var(--bordure);
  border-radius: var(--rayon);
  padding: 1rem 1.1rem;
  font-size: .87rem;
  align-self: start;
  position: sticky;
  top: 5rem;
}
.sommaire h2 { font-size: .8rem; text-transform: uppercase; letter-spacing: .04em; margin: 0 0 .6rem; color: var(--encre-doux); }
.sommaire ol { padding-left: 1.1rem; margin: 0; }
.sommaire a { text-decoration: none; color: var(--encre); }
.sommaire a:hover { color: var(--froid); }

/* ---------- Pied de page ---------- */
.site-footer {
  background: var(--encre);
  color: #c8d1da;
  margin-top: 3rem;
  padding: 2.2rem 0 1.4rem;
  font-size: .88rem;
}
.site-footer a { color: #dbe4ea; }
.footer-grille {
  display: grid;
  gap: 1.6rem;
  grid-template-columns: 1fr;
  margin-bottom: 1.6rem;
}
@media (min-width: 720px) { .footer-grille { grid-template-columns: repeat(4, 1fr); } }
.footer-grille h4 { color: #fff; font-size: .82rem; text-transform: uppercase; letter-spacing: .04em; margin: 0 0 .7rem; }
.footer-grille ul { list-style: none; padding: 0; margin: 0; }
.footer-grille li { margin-bottom: .45rem; }
.footer-bas {
  border-top: 1px solid rgba(255,255,255,.12);
  padding-top: 1rem;
  font-size: .78rem;
  color: #8f9dab;
  display: flex;
  flex-wrap: wrap;
  gap: .6rem 1.2rem;
  justify-content: space-between;
}

/* ---------- Sections liste "articles liés" ---------- */
.articles-lies { margin: 2rem 0; }
.articles-lies ul { list-style: none; padding: 0; }
.articles-lies li { border-top: 1px solid var(--bordure); padding: .7rem 0; }
.articles-lies a { text-decoration: none; font-weight: 600; }

/* ---------- Accessibilité focus ---------- */
a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible, summary:focus-visible {
  outline: 3px solid var(--chaud);
  outline-offset: 2px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--froid);
  color: #fff;
  padding: .6rem 1rem;
  z-index: 100;
}
.skip-link:focus { left: .5rem; top: .5rem; }