/* ============================================================
   Le Carnet du Chauffagiste — habillage par-dessus Bootstrap 5
   Palette : fonte, acier, eau, cuivre, laiton
   ============================================================ */

:root {
  --fonte:  #16232b;
  --acier:  #2a4a59;
  --eau:    #2e7f94;
  --cuivre: #a8582c;
  --laiton: #c9a227;
  --papier: #f1f3f2;
  --trait:  #d7dedd;
  --gris:   #5f7078;

  --police-titre: "Barlow Condensed", "Arial Narrow", sans-serif;
  --police-texte: "Source Sans 3", system-ui, -apple-system, sans-serif;
}

body {
  font-family: var(--police-texte);
  color: var(--fonte);
  background: var(--papier);
  font-size: 1.02rem;
  line-height: 1.65;
}

h1, h2, h3, h4, .marque-titre, .btn, .nav-link, .eyebrow {
  font-family: var(--police-titre);
  letter-spacing: .01em;
}
h1 { font-weight: 700; font-size: clamp(2rem, 4.5vw, 3.2rem); line-height: 1.05; }
h2 { font-weight: 600; font-size: clamp(1.5rem, 3vw, 2.1rem); }

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

.skip {
  position: absolute; top: .5rem; left: .5rem; z-index: 2000;
  background: var(--fonte); color: #fff; padding: .5rem .9rem; border-radius: 3px;
}

/* ---------- En-tête ---------- */
.bandeau-service {
  background: var(--fonte); color: #cfd9dd;
  font-size: .82rem; padding: .38rem 0; letter-spacing: .02em;
}
.bandeau-service i { color: var(--laiton); }

.nav-blog { background: #fff; border-bottom: 1px solid var(--trait); padding: .65rem 0; }
.navbar-brand { line-height: 1.05; }
.marque-titre {
  display: block; font-size: 1.5rem; font-weight: 700;
  text-transform: uppercase; color: var(--fonte);
}
.marque-sous {
  display: block; font-family: var(--police-texte);
  font-size: .7rem; letter-spacing: .18em; text-transform: uppercase; color: var(--gris);
}
.nav-blog .nav-link {
  text-transform: uppercase; font-size: .98rem; font-weight: 600;
  color: var(--acier); letter-spacing: .04em;
}
.nav-blog .nav-link:hover, .nav-blog .nav-link:focus { color: var(--cuivre); }
.badge-alerte {
  background: var(--cuivre); font-size: .62rem; position: absolute; top: 2px; right: -6px;
}

/* ---------- Boutons ---------- */
.btn { text-transform: uppercase; font-weight: 600; letter-spacing: .05em; border-radius: 3px; }
.btn-cuivre { background: var(--cuivre); border-color: var(--cuivre); color: #fff; }
.btn-cuivre:hover, .btn-cuivre:focus { background: #8f4823; border-color: #8f4823; color: #fff; }
.btn-acier { background: var(--acier); border-color: var(--acier); color: #fff; }
.btn-acier:hover { background: var(--fonte); border-color: var(--fonte); color: #fff; }
.btn-contour { border: 1px solid var(--acier); color: var(--acier); background: transparent; }
.btn-contour:hover { background: var(--acier); color: #fff; }

/* ---------- Signature : le raccord ---------- */
/* Petit carré laiton + filet, comme une bague de serrage sur un tuyau */
.raccord {
  display: flex; align-items: center; gap: .75rem; margin: 0 0 1.6rem;
}
.raccord::before {
  content: ""; width: 10px; height: 10px; flex: 0 0 10px;
  background: var(--laiton); transform: rotate(45deg);
}
.raccord::after {
  content: ""; height: 1px; flex: 1 1 auto; background: var(--trait);
}
.eyebrow {
  text-transform: uppercase; letter-spacing: .16em; font-size: .78rem;
  font-weight: 600; color: var(--cuivre);
}

/* ---------- Une (hero) ---------- */
.une {
  background: linear-gradient(180deg, #1b2f3a 0%, var(--fonte) 100%);
  color: #eef2f3; padding: clamp(3rem, 8vw, 5.5rem) 0;
}
.une h1 { color: #fff; }
.une .eyebrow { color: var(--laiton); }
.une p { color: #bcc9cf; max-width: 46ch; }

/* ---------- Cartes d'articles ---------- */
.carte-article {
  background: #fff; border: 1px solid var(--trait); border-left: 3px solid transparent;
  border-radius: 3px; height: 100%; overflow: hidden;
  transition: border-left-color .18s ease, transform .18s ease;
}
.carte-article:hover { border-left-color: var(--cuivre); transform: translateY(-2px); }
.carte-article img { width: 100%; aspect-ratio: 16 / 9; object-fit: cover; }
.carte-article .card-body { padding: 1.15rem 1.25rem 1.4rem; }
.carte-article h3 { font-size: 1.32rem; margin: .3rem 0 .5rem; }
.carte-article h3 a { color: var(--fonte); text-decoration: none; }
.carte-article h3 a:hover { color: var(--cuivre); }
.meta { font-size: .8rem; color: var(--gris); letter-spacing: .02em; }

.puce-categorie {
  display: inline-block; font-family: var(--police-titre); text-transform: uppercase;
  font-size: .74rem; letter-spacing: .12em; color: var(--eau);
  border: 1px solid currentColor; padding: .1rem .5rem; border-radius: 2px;
  text-decoration: none;
}
.puce-categorie:hover { background: var(--eau); color: #fff; }

/* ---------- Article ---------- */
.article-corps { font-size: 1.09rem; max-width: 68ch; }
.article-corps p { margin-bottom: 1.15rem; }
.article-corps a { color: var(--eau); }
.article-image { width: 100%; max-height: 460px; object-fit: cover; border-radius: 3px; }

/* ---------- Blocs et formulaires ---------- */
.bloc {
  background: #fff; border: 1px solid var(--trait); border-radius: 3px; padding: 1.6rem;
}
.form-label { font-weight: 600; font-size: .93rem; }
.form-control, .form-select {
  border-radius: 3px; border-color: var(--trait); padding: .6rem .8rem;
}
.form-control:focus, .form-select:focus {
  border-color: var(--eau); box-shadow: 0 0 0 .18rem rgba(46,127,148,.18);
}
.pot-de-miel { position: absolute; left: -9999px; opacity: 0; }

/* Jauge de robustesse du mot de passe */
.jauge { height: 5px; background: var(--trait); border-radius: 3px; overflow: hidden; }
.jauge span { display: block; height: 100%; width: 0; transition: width .25s ease, background .25s ease; }

/* ---------- Commentaires ---------- */
.commentaire { border-left: 2px solid var(--trait); padding: .1rem 0 .1rem 1rem; margin-bottom: 1.4rem; }
.commentaire .auteur { font-weight: 600; }
.commentaire.reponse { margin-left: 2rem; border-left-color: var(--eau); }

/* ---------- Messagerie ---------- */
.bulle { border-radius: 4px; padding: .8rem 1rem; margin-bottom: .8rem; max-width: 80%; }
.bulle-moi { background: var(--acier); color: #fff; margin-left: auto; }
.bulle-eux { background: #fff; border: 1px solid var(--trait); }
.bulle .horodatage { font-size: .74rem; opacity: .75; display: block; margin-top: .35rem; }

/* ---------- Pied ---------- */
.pied { background: var(--fonte); color: #b8c5cb; padding: 3rem 0 1.4rem; margin-top: 4rem; }
.pied-marque { font-family: var(--police-titre); font-size: 1.35rem; text-transform: uppercase; color: #fff; }
.pied-titre { font-family: var(--police-titre); text-transform: uppercase; letter-spacing: .1em;
              font-size: .88rem; color: var(--laiton); }
.pied-liens { list-style: none; padding: 0; margin: 0; }
.pied-liens a { color: #b8c5cb; text-decoration: none; font-size: .94rem; line-height: 2; }
.pied-liens a:hover { color: #fff; }
.pied-bas {
  border-top: 1px solid #2c3d47; margin-top: 2.2rem; padding-top: 1rem;
  display: flex; flex-wrap: wrap; justify-content: space-between; gap: .5rem; font-size: .84rem;
}
.pied-bas a { color: #b8c5cb; }

/* ---------- Accessibilité ---------- */
:focus-visible { outline: 3px solid var(--laiton); outline-offset: 2px; }
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
}