/* ===========================================================
   Eco Reno BCG — Feuille de style
   Style : pro / corporate, accent éco
   =========================================================== */

:root {
  --bleu: #0f3d5c;
  --bleu-clair: #1d6e9c;
  --vert: #4caf78;
  --vert-fonce: #3a8c5f;
  --gris-fonce: #2b3440;
  --gris: #5a6573;
  --gris-clair: #f4f6f8;
  --blanc: #ffffff;
  --ombre: 0 8px 30px rgba(15, 61, 92, 0.10);
  --ombre-douce: 0 4px 16px rgba(15, 61, 92, 0.06);
  --radius: 12px;
  --max: 1180px;
  --transition: 0.25s ease;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: "Segoe UI", system-ui, -apple-system, Roboto, Helvetica, Arial, sans-serif;
  color: var(--gris-fonce);
  line-height: 1.65;
  background: var(--blanc);
}

h1, h2, h3, h4 { color: var(--bleu); line-height: 1.25; font-weight: 700; }
a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }

.container { width: 92%; max-width: var(--max); margin: 0 auto; }

/* ---------- Boutons ---------- */
.btn {
  display: inline-block;
  padding: 0.85rem 1.8rem;
  border-radius: 50px;
  font-weight: 600;
  font-size: 0.98rem;
  cursor: pointer;
  transition: var(--transition);
  border: 2px solid transparent;
}
.btn-primaire { background: var(--vert); color: #fff; }
.btn-primaire:hover { background: var(--vert-fonce); transform: translateY(-2px); }
.btn-secondaire { background: transparent; color: #fff; border-color: rgba(255,255,255,0.7); }
.btn-secondaire:hover { background: rgba(255,255,255,0.15); }
.btn-bleu { background: var(--bleu); color: #fff; }
.btn-bleu:hover { background: var(--bleu-clair); transform: translateY(-2px); }

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,0.96);
  backdrop-filter: blur(8px);
  box-shadow: var(--ombre-douce);
}
.nav {
  display: flex; align-items: center; justify-content: space-between;
  padding: 1rem 0;
}
.logo { display: flex; align-items: center; gap: 0.6rem; font-weight: 800; font-size: 1.25rem; color: var(--bleu); }
.logo .leaf {
  width: 40px; height: 40px; border-radius: 10px;
  background: linear-gradient(135deg, var(--vert), var(--bleu-clair));
  display: grid; place-items: center; color: #fff;
}
.logo .leaf svg { width: 24px; height: 24px; }
.logo span.eco { color: var(--vert); }
.nav-links { display: flex; align-items: center; gap: 1.8rem; list-style: none; }
.nav-links a { font-weight: 500; color: var(--gris-fonce); transition: var(--transition); }
.nav-links a:hover, .nav-links a.actif { color: var(--vert); }
.nav-links .btn { padding: 0.6rem 1.3rem; }
.menu-toggle { display: none; background: none; border: 0; font-size: 1.6rem; color: var(--bleu); cursor: pointer; }

/* ---------- Hero ---------- */
.hero {
  background:
    linear-gradient(135deg, rgba(15,61,92,0.92), rgba(29,110,156,0.85)),
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='1200' height='600'%3E%3Crect fill='%23123a55' width='1200' height='600'/%3E%3C/svg%3E") center/cover;
  color: #fff;
  padding: 5.5rem 0 6rem;
}
.hero-inner { max-width: 720px; }
.hero .tag {
  display: inline-block; background: rgba(76,175,120,0.25);
  border: 1px solid rgba(76,175,120,0.6);
  color: #d8f3e3; padding: 0.4rem 1rem; border-radius: 50px;
  font-size: 0.85rem; font-weight: 600; margin-bottom: 1.4rem;
}
.hero h1 { color: #fff; font-size: clamp(2rem, 5vw, 3.2rem); margin-bottom: 1.2rem; }
.hero p { font-size: 1.15rem; color: #e4edf3; margin-bottom: 2rem; }
.hero-actions { display: flex; gap: 1rem; flex-wrap: wrap; }

/* ---------- Sections ---------- */
section { padding: 4.5rem 0; }
.section-titre { text-align: center; max-width: 680px; margin: 0 auto 3rem; }
.section-titre .sur-titre { color: var(--vert); font-weight: 700; letter-spacing: 1px; text-transform: uppercase; font-size: 0.85rem; }
.section-titre h2 { font-size: clamp(1.7rem, 3.5vw, 2.4rem); margin: 0.5rem 0 0.8rem; }
.section-titre p { color: var(--gris); }

.bg-clair { background: var(--gris-clair); }

/* ---------- Cartes services ---------- */
.grille { display: grid; gap: 1.8rem; }
.grille-3 { grid-template-columns: repeat(3, 1fr); }
.grille-2 { grid-template-columns: repeat(2, 1fr); }

.carte {
  background: #fff; border-radius: var(--radius); padding: 2rem;
  box-shadow: var(--ombre-douce); transition: var(--transition);
  border: 1px solid #eef1f4;
}
.carte:hover { transform: translateY(-6px); box-shadow: var(--ombre); }
.carte .ico {
  width: 58px; height: 58px; border-radius: 14px;
  background: linear-gradient(135deg, var(--vert), var(--vert-fonce));
  display: grid; place-items: center; color: #fff; margin-bottom: 1.2rem;
}
.carte .ico svg { width: 30px; height: 30px; }
.carte h3 { font-size: 1.25rem; margin-bottom: 0.6rem; }
.carte p { color: var(--gris); font-size: 0.98rem; }

/* ---------- Points forts ---------- */
.atouts { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.5rem; text-align: center; }
.atout .num { font-size: 2.4rem; font-weight: 800; color: var(--vert); line-height: 1; }
.atout .num svg { width: 44px; height: 44px; vertical-align: middle; }
.atout p { color: var(--gris); font-size: 0.95rem; margin-top: 0.3rem; }

/* ---------- Bande CTA ---------- */
.cta-bande {
  background: linear-gradient(135deg, var(--vert-fonce), var(--bleu));
  color: #fff; text-align: center; border-radius: 18px; padding: 3rem 2rem;
}
.cta-bande h2 { color: #fff; font-size: 1.9rem; margin-bottom: 0.8rem; }
.cta-bande p { color: #e6f3ec; margin-bottom: 1.8rem; }

/* ---------- Liste prestations (page services) ---------- */
.presta {
  display: grid; grid-template-columns: 1fr 1fr; gap: 2.5rem; align-items: center;
  margin-bottom: 3.5rem;
}
.presta:nth-child(even) .presta-media { order: 2; }
.presta-media {
  border-radius: var(--radius); min-height: 320px;
  background: linear-gradient(135deg, var(--bleu-clair), var(--bleu));
  display: grid; place-items: center; color: #fff;
  box-shadow: var(--ombre); overflow: hidden; position: relative;
}
.presta-media svg { width: 62%; max-width: 220px; height: auto; opacity: 0.96; }
.presta-media.vert { background: linear-gradient(135deg, var(--vert), var(--vert-fonce)); }
.presta-texte h3 { font-size: 1.6rem; margin-bottom: 1rem; }
.presta-texte ul { list-style: none; margin-top: 1rem; }
.presta-texte li { padding: 0.45rem 0 0.45rem 1.8rem; position: relative; color: var(--gris-fonce); }
.presta-texte li::before {
  content: "✓"; position: absolute; left: 0; color: var(--vert); font-weight: 800;
}

/* ---------- Étapes / processus ---------- */
.etapes { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.5rem; }
.etape { text-align: center; }
.etape .cercle {
  width: 60px; height: 60px; margin: 0 auto 1rem; border-radius: 50%;
  background: var(--bleu); color: #fff; display: grid; place-items: center;
  font-size: 1.4rem; font-weight: 800;
}
.etape h4 { margin-bottom: 0.4rem; }
.etape p { color: var(--gris); font-size: 0.92rem; }

/* ---------- Footer ---------- */
.site-footer { background: var(--gris-fonce); color: #c9d2dc; padding: 3.5rem 0 1.5rem; }
.footer-grille { display: grid; grid-template-columns: 1.6fr 1fr 1fr; gap: 2.5rem; }
.site-footer h4 { color: #fff; margin-bottom: 1rem; font-size: 1.05rem; }
.site-footer a { color: #c9d2dc; transition: var(--transition); }
.site-footer a:hover { color: var(--vert); }
.site-footer ul { list-style: none; }
.site-footer ul li { margin-bottom: 0.5rem; }
.footer-logo { color: #fff; font-weight: 800; font-size: 1.3rem; margin-bottom: 0.8rem; }
.footer-logo span { color: var(--vert); }
.footer-bas {
  border-top: 1px solid rgba(255,255,255,0.12); margin-top: 2.5rem; padding-top: 1.5rem;
  text-align: center; font-size: 0.88rem; color: #8b97a4;
}

/* ---------- Bandeau cookies ---------- */
.cookie-banner {
  position: fixed; bottom: 0; left: 0; right: 0; z-index: 1000;
  background: var(--gris-fonce); color: #e6ebf0;
  padding: 1.1rem 1.5rem;
  display: flex; align-items: center; justify-content: center;
  gap: 1.5rem; flex-wrap: wrap;
  box-shadow: 0 -4px 20px rgba(0,0,0,0.25);
}
.cookie-banner p { font-size: 0.92rem; max-width: 760px; margin: 0; }
.cookie-banner a { color: var(--vert); text-decoration: underline; }
.cookie-actions { display: flex; gap: 0.8rem; flex-shrink: 0; }
.cookie-actions .btn { padding: 0.6rem 1.4rem; font-size: 0.92rem; }

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .grille-3 { grid-template-columns: repeat(2, 1fr); }
  .atouts { grid-template-columns: repeat(2, 1fr); }
  .etapes { grid-template-columns: repeat(2, 1fr); }
  .footer-grille { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 680px) {
  .nav-links {
    position: absolute; top: 100%; left: 0; right: 0;
    background: #fff; flex-direction: column; align-items: flex-start;
    gap: 0; padding: 1rem 6%; box-shadow: var(--ombre);
    display: none;
  }
  .nav-links.ouvert { display: flex; }
  .nav-links li { width: 100%; padding: 0.6rem 0; }
  .menu-toggle { display: block; }
  .grille-3, .grille-2, .atouts, .etapes { grid-template-columns: 1fr; }
  .presta { grid-template-columns: 1fr; }
  .presta:nth-child(even) .presta-media { order: 0; }
  .presta-media { min-height: 200px; }
}