/* ==========================================================================
   Design system — Site Builder "Trust & Craft"
   Palette chauffagiste : orange chaleur / cuivre
   ========================================================================== */

:root {
  /* Couleurs */
  --color-ink: #1c1410;          /* titres, texte fort (brun chaud foncé) */
  --color-text: #3f342c;         /* texte courant */
  --color-muted: #7a6a5c;        /* texte secondaire */
  --color-bg: #ffffff;
  --color-bg-alt: #fdf6f1;       /* sections alternées, ton chaud clair */
  --color-border: #ecdfd4;

  --color-accent: #ea580c;       /* orange chauffage */
  --color-accent-dark: #c2410c;
  --color-accent-light: #ffedd5;

  --color-copper: #b45309;       /* accent secondaire cuivre */

  /* Ombres */
  --shadow-sm: 0 1px 2px rgba(28, 20, 16, 0.07);
  --shadow-md: 0 4px 16px rgba(28, 20, 16, 0.10);
  --shadow-lg: 0 20px 40px -12px rgba(28, 20, 16, 0.22);

  /* Rayons */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-pill: 999px;

  /* Rythme */
  --space-section: 5rem;
  --space-section-mobile: 3rem;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  padding-bottom: 0;
}

.container {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

h1, h2, h3 {
  color: var(--color-ink);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin: 0 0 1rem;
}

h1 { font-size: clamp(2.1rem, 4.2vw, 2.9rem); }
h2 { font-size: clamp(1.55rem, 3vw, 2.1rem); margin-top: 0; }
h3 { font-size: 1.25rem; }

p { margin: 0 0 1rem; }

a {
  color: var(--color-accent);
  text-decoration: none;
}
a:hover { color: var(--color-accent-dark); }

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding: 1rem 1.5rem;
  flex-wrap: wrap;
}
.brand {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}
.brand-mark {
  font-weight: 800;
  font-size: 1.15rem;
  color: var(--color-ink);
}
.brand-trade {
  font-size: 0.78rem;
  color: var(--color-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.main-nav {
  display: flex;
  gap: 1.5rem;
}
.main-nav a {
  color: var(--color-ink);
  font-weight: 500;
  font-size: 0.95rem;
}
.main-nav a:hover { color: var(--color-accent); }

.header-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}
.header-tel {
  font-weight: 700;
  color: var(--color-ink);
  font-size: 0.95rem;
  white-space: nowrap;
}
.header-tel:hover { color: var(--color-accent); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.65rem 1.25rem;
  border-radius: var(--radius-pill);
  font-weight: 600;
  font-size: 0.95rem;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
  border: none;
  cursor: pointer;
}
.btn-primary {
  background: var(--color-accent);
  color: #fff;
  box-shadow: var(--shadow-sm);
}
.btn-primary:hover {
  background: var(--color-accent-dark);
  color: #fff;
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}
.btn-light {
  background: #fff;
  color: var(--color-ink);
}
.btn-light:hover { background: var(--color-bg-alt); color: var(--color-ink); }
.btn-lg { padding: 0.9rem 1.75rem; font-size: 1.05rem; }
.btn-call { white-space: nowrap; }

/* ---------- Hero (asymétrique) ---------- */
.hero {
  padding: var(--space-section) 0 3rem;
  background: linear-gradient(180deg, var(--color-bg-alt) 0%, var(--color-bg) 100%);
}
.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(280px, 0.85fr);
  gap: 3rem;
  align-items: start;
}
.hero-eyebrow {
  display: inline-block;
  background: var(--color-accent-light);
  color: var(--color-accent-dark);
  font-weight: 600;
  font-size: 0.82rem;
  padding: 0.35rem 0.9rem;
  border-radius: var(--radius-pill);
  margin-bottom: 1rem;
}
.hero-lede {
  font-size: 1.15rem;
  color: var(--color-muted);
  max-width: 640px;
}
.hero-actions {
  display: flex;
  gap: 0.9rem;
  flex-wrap: wrap;
  margin-top: 1.5rem;
}
.hero-note {
  margin-top: 1rem;
  font-size: 0.88rem;
  color: var(--color-muted);
}

.trust-panel {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  box-shadow: var(--shadow-md);
}
.trust-panel h3 { font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--color-muted); margin-bottom: 1rem; font-weight: 700; }
.trust-item { display: flex; align-items: flex-start; gap: 0.85rem; padding: 0.85rem 0; border-top: 1px solid var(--color-border); }
.trust-item:first-of-type { border-top: none; padding-top: 0; }
.trust-item strong { display: block; color: var(--color-ink); font-size: 0.95rem; }
.trust-item span { color: var(--color-muted); font-size: 0.87rem; }
.trust-icon { flex-shrink: 0; width: 22px; height: 22px; color: var(--color-accent); margin-top: 0.1rem; }

@media (max-width: 860px) { .hero-inner { grid-template-columns: 1fr; } }

/* ---------- Barre de confiance ---------- */
.trust-bar {
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  background: #fff;
  padding: 1.5rem 0;
}
.trust-bar-inner {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1rem;
  text-align: center;
}
.trust-bar-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.4rem;
  font-weight: 600;
  color: var(--color-ink);
  font-size: 0.92rem;
}
.trust-bar-item .icon { width: 26px; height: 26px; color: var(--color-accent); }

/* ---------- Séparateur signature (onde de chaleur) ---------- */
.heat-divider {
  display: block;
  width: 100%;
  height: 28px;
  margin: 0 auto;
  color: var(--color-accent-light);
}

/* ---------- Content sections ---------- */
.content {
  padding: 1rem 1.5rem 2rem;
}
section.block { padding: var(--space-section) 0; }
section.block.alt { background: var(--color-bg-alt); }
.section-head { max-width: 680px; margin: 0 auto 2.5rem; text-align: center; }
.section-head .hero-eyebrow { margin-bottom: 0.75rem; }
.section-head p { color: var(--color-muted); }

.service-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.25rem;
  margin: 2rem 0;
}
.service-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.15s ease, transform 0.15s ease;
}
.service-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}
.service-card h3 { margin-bottom: 0.5rem; }
.service-card p { color: var(--color-muted); margin-bottom: 0.5rem; }
.service-card .service-benefit { font-size: 0.87rem; font-weight: 600; color: var(--color-accent-dark); }

.service-card.is-primary {
  border-color: var(--color-accent);
  background: linear-gradient(180deg, var(--color-accent-light) 0%, #fff 42%);
  box-shadow: var(--shadow-md);
}
.service-card.is-primary .icon-badge { background: var(--color-accent); color: #fff; }
.service-card .icon-badge {
  width: 46px; height: 46px;
  border-radius: 10px;
  background: var(--color-accent-light);
  color: var(--color-accent-dark);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 1rem;
}
.service-card .icon-badge svg { width: 24px; height: 24px; }
.badge-tag {
  display: inline-block;
  background: var(--color-accent);
  color: #fff;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-pill);
  margin-bottom: 0.6rem;
}

/* ---------- Réalisations ---------- */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.25rem;
  margin: 2rem 0;
}
.gallery-item {
  margin: 0;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--color-border);
  background: var(--color-bg-alt);
  box-shadow: var(--shadow-sm);
}
.gallery-visual {
  height: 180px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--color-accent-light) 0%, #fff 100%);
  color: var(--color-accent-dark);
}
.gallery-visual svg { width: 48px; height: 48px; }
.gallery-item figcaption {
  padding: 0.9rem 1.1rem;
  font-size: 0.9rem;
  color: var(--color-muted);
}
.gallery-item figcaption strong { display: block; color: var(--color-ink); margin-bottom: 0.2rem; }

/* ---------- Processus ---------- */
.process-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.5rem;
  margin: 2rem 0;
  counter-reset: step;
}
.process-step {
  position: relative;
  padding: 1.75rem 1.5rem 1.5rem;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}
.process-step .step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 50%;
  background: var(--color-accent);
  color: #fff;
  font-weight: 800;
  margin-bottom: 1rem;
}

/* ---------- Avis ---------- */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.25rem;
  margin: 2rem 0;
}
.review-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
}
.review-card p.quote { font-style: italic; color: var(--color-text); }
.review-card .review-author { font-weight: 700; color: var(--color-ink); font-size: 0.9rem; }
.review-note {
  text-align: center;
  color: var(--color-muted);
  font-size: 0.92rem;
  margin-top: 1.5rem;
}

/* ---------- FAQ ---------- */
.faq-list { max-width: 760px; margin: 2rem auto 0; }
.faq-item {
  border-bottom: 1px solid var(--color-border);
  padding: 1.25rem 0;
}
.faq-item h3 { font-size: 1.05rem; margin-bottom: 0.5rem; color: var(--color-ink); }
.faq-item p { color: var(--color-muted); margin-bottom: 0; }

/* ---------- Formulaire de devis ---------- */
.quote-form-wrap {
  background: var(--color-ink);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  color: #fff;
  max-width: 640px;
  margin: 2rem auto 0;
}
.quote-form-wrap h2 { color: #fff; }
.quote-form-wrap p.form-lede { color: #d8c9bd; }
.quote-form { display: grid; gap: 1rem; margin-top: 1.5rem; }
.quote-form label { display: block; font-size: 0.85rem; font-weight: 600; margin-bottom: 0.4rem; color: #f1e6dc; }
.quote-form input, .quote-form textarea {
  width: 100%;
  padding: 0.75rem 0.9rem;
  border-radius: var(--radius-sm);
  border: 1px solid #4a3a2f;
  background: #241c17;
  color: #fff;
  font-family: inherit;
  font-size: 0.95rem;
}
.quote-form input::placeholder, .quote-form textarea::placeholder { color: #8c7c6e; }
.quote-form .form-row-check { display: flex; align-items: flex-start; gap: 0.6rem; font-size: 0.85rem; color: #d8c9bd; }
.quote-form .form-row-check input { width: auto; margin-top: 0.2rem; }
.quote-form button {
  justify-self: start;
  margin-top: 0.5rem;
}

/* ---------- CTA band ---------- */
.cta-band {
  background: var(--color-ink);
  color: #fff;
  padding: 3rem 0;
  margin-top: var(--space-section);
}
.cta-band-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  flex-wrap: wrap;
}
.cta-eyebrow {
  color: #fdba74;
  font-weight: 600;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.35rem;
}
.cta-title {
  color: #fff;
  margin: 0;
  font-size: 1.5rem;
}

/* ---------- Footer ---------- */
.site-footer {
  background: var(--color-bg-alt);
  border-top: 1px solid var(--color-border);
  padding: 2.5rem 0 1rem;
  margin-top: 0;
}
.footer-inner {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.5rem;
}
.footer-col p { margin: 0 0 0.4rem; color: var(--color-muted); }
.footer-brand { color: var(--color-ink); font-weight: 700; font-size: 1.05rem; }
.footer-trade { text-transform: uppercase; font-size: 0.78rem; letter-spacing: 0.04em; }
.footer-heading { font-weight: 700; color: var(--color-ink); font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.04em; margin-bottom: 0.6rem; }
.footer-links { display: flex; flex-direction: column; gap: 0.35rem; margin-top: 0.5rem; }
.footer-bottom {
  border-top: 1px solid var(--color-border);
  margin-top: 2rem;
  padding-top: 1rem;
  font-size: 0.82rem;
  color: var(--color-muted);
}
.footer-legal { font-size: 0.78rem; }

/* ---------- Mobile action bar ---------- */
.mobile-action-bar {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 60;
  background: #fff;
  border-top: 1px solid var(--color-border);
  box-shadow: 0 -4px 16px rgba(28,20,16,0.12);
}
.mobile-action {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.9rem 0.5rem;
  font-weight: 700;
  font-size: 0.92rem;
}
.mobile-action-call { color: var(--color-ink); background: #fff; }
.mobile-action-quote { color: #fff; background: var(--color-accent); }

/* ---------- Responsive ---------- */
@media (max-width: 640px) {
  :root {
    --space-section: var(--space-section-mobile);
  }
  .header-inner { flex-direction: column; align-items: stretch; text-align: center; }
  .main-nav { justify-content: center; flex-wrap: wrap; }
  .header-actions { justify-content: center; }
  .btn-call { justify-content: center; }
  .cta-band-inner { flex-direction: column; text-align: center; }
  .mobile-action-bar { display: flex; }
  body { padding-bottom: 3.75rem; }
  .quote-form-wrap { padding: 1.75rem 1.25rem; }
}