/* =====================================================================
   SITE VITRINE ONE-PAGE — [NOM_ACTIVITÉ]
   Landing de prospection, orientée conversion. Responsive.
   Même système de marque que la brochure : pétrole + ocre,
   titres sans-serif / corps serif / libellés monospace.
   ===================================================================== */

/* ----------------------------- TOKENS -------------------------------- */
:root {
  --encre:        #1A2A33;
  --petrol:       #0E3A47;
  --petrol-clair: #134E5E;
  --petrol-tint:  #EDF2F3;
  --ocre:         #B7841F;
  --ocre-fonce:   #8F6612;
  --papier:       #FBFAF8;
  --carte:        #FFFFFF;
  --bord:         #E2E0D9;
  --muet:         #5C6B72;

  --sans: "Helvetica Neue", Arial, "Segoe UI", sans-serif;
  --serif: Georgia, "Times New Roman", serif;
  --mono: ui-monospace, "SF Mono", "Consolas", "Liberation Mono", monospace;

  --max: 1080px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--serif);
  color: var(--encre);
  background: var(--papier);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; }

/* --------------------------- TYPOGRAPHIE --------------------------- */
h1, h2, h3 {
  font-family: var(--sans);
  color: var(--petrol);
  font-weight: 800;
  letter-spacing: -0.025em;
  line-height: 1.1;
  margin: 0 0 .4em;
}
h1 { font-size: clamp(2rem, 5vw, 3.3rem); }
h2 { font-size: clamp(1.6rem, 3.5vw, 2.4rem); }
h3 { font-size: 1.15rem; letter-spacing: -0.01em; }
p  { margin: 0 0 1em; }
a  { color: var(--ocre-fonce); }

.eyebrow {
  font-family: var(--mono);
  font-size: .72rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--ocre-fonce);
  display: inline-flex; align-items: center; gap: .6em;
  margin: 0 0 1.1em;
}
.eyebrow::before { content:""; width: 26px; height: 1px; background: var(--ocre); }

.lead { font-size: 1.2rem; color: var(--encre); }
.muted { color: var(--muet); }

/* ----------------------------- LAYOUT ------------------------------ */
.wrap { max-width: var(--max); margin: 0 auto; padding: 0 24px; }
section { padding: 88px 0; }
section + section { border-top: 1px solid var(--bord); }

/* connecteur signature */
.connector { display:inline-flex; align-items:center; height:8px; }
.connector i { width:7px; height:7px; border-radius:50%; background:var(--ocre); }
.connector span { width:26px; height:1.5px; background:var(--petrol); }

/* ------------------------------ NAV -------------------------------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(251,250,248,.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--bord);
}
.nav .wrap { display: flex; align-items: center; justify-content: space-between; padding-top: 16px; padding-bottom: 16px; }
.nav .brand { font-family: var(--sans); font-weight: 800; color: var(--petrol); letter-spacing: -.01em; display:flex; align-items:center; gap:9px; font-size:1.1rem; }
.nav .brand .dot { width: 9px; height: 9px; border-radius: 50%; background: var(--ocre); }
.nav .links { display: flex; gap: 26px; align-items: center; }
.nav .links a { font-family: var(--sans); font-size: .92rem; color: var(--encre); text-decoration: none; font-weight: 600; }
.nav .links a:hover { color: var(--ocre-fonce); }
.nav .links a.btn { color: #fff; }

/* ----------------------------- BOUTONS ----------------------------- */
.btn {
  display: inline-block;
  font-family: var(--sans); font-weight: 700; font-size: .95rem;
  background: var(--ocre); color: #fff;
  padding: 13px 24px; border-radius: 6px; text-decoration: none;
  border: 1px solid var(--ocre); transition: background .15s, transform .05s;
}
.btn:hover { background: var(--ocre-fonce); color:#fff; }
.btn:active { transform: translateY(1px); }
.btn-ghost {
  background: transparent; color: var(--petrol); border: 1px solid var(--bord);
}
.btn-ghost:hover { background: var(--petrol-tint); color: var(--petrol); }
.btn-light { background:#fff; color: var(--petrol); border-color:#fff; }
.btn-light:hover { background:#EAF1F2; color: var(--petrol); }

/* ------------------------------ HERO ------------------------------- */
.hero {
  background: var(--petrol);
  color: #EAF1F2;
  padding: 110px 0 96px;
  border: 0;
}
.hero h1 { color: #fff; max-width: 17ch; }
.hero .sub { font-size: 1.22rem; color: #B9D0D4; max-width: 56ch; margin: 18px 0 30px; }
.hero .cta-row { display: flex; gap: 14px; flex-wrap: wrap; align-items: center; }
.hero .reassure { font-family: var(--mono); font-size: .8rem; color: #8FB0B6; margin-top: 22px; letter-spacing: .03em; }
.hero .reassure span { white-space: nowrap; margin-right: 18px; }
.hero .reassure span::before { content:"✓ "; color: var(--ocre); }

/* ---------------------------- PROBLÈMES ---------------------------- */
.problems-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 18px; margin-top: 36px; }
.problem {
  background: var(--carte); border: 1px solid var(--bord); border-top: 3px solid var(--ocre);
  border-radius: 8px; padding: 22px;
}
.problem h3 { font-size: 1.02rem; }
.problem p { color: var(--muet); font-size: .95rem; margin: 0; }

/* ---------------------------- SERVICES ----------------------------- */
.bg-tint { background: var(--petrol-tint); }
.services-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 18px; margin-top: 36px; }
.service {
  background: var(--carte); border: 1px solid var(--bord); border-radius: 8px; padding: 26px;
  display: flex; flex-direction: column;
}
.service.is-feature { border: 1.5px solid var(--petrol); position: relative; }
.service .tag {
  font-family: var(--mono); font-size: .68rem; letter-spacing: .1em; text-transform: uppercase;
  color: var(--ocre-fonce); background: #F6EFDD; border-radius: 4px; padding: 3px 8px;
  align-self: flex-start; margin-bottom: 14px;
}
.service .price { font-family: var(--sans); font-weight: 800; color: var(--petrol); font-size: 1.5rem; margin: 6px 0 2px; }
.service .price small { font-family: var(--serif); font-weight: normal; font-size: .85rem; color: var(--muet); }
.service ul { padding-left: 1.1em; margin: 14px 0 0; color: var(--muet); font-size: .93rem; }
.service li { margin-bottom: 5px; }
.service .dur { font-family: var(--mono); font-size: .78rem; color: var(--muet); margin-top: 16px; }

/* --------------------------- CAS D'USAGE --------------------------- */
.uc-list { margin-top: 30px; }
.uc {
  display: grid; grid-template-columns: 1fr auto; gap: 8px 24px; align-items: baseline;
  padding: 20px 0; border-bottom: 1px solid var(--bord);
}
.uc:first-child { border-top: 1px solid var(--bord); }
.uc h3 { margin: 0 0 4px; font-size: 1.05rem; }
.uc p { margin: 0; color: var(--muet); font-size: .95rem; }
.uc .gain { font-family: var(--mono); font-size: .78rem; color: var(--ocre-fonce); text-align: right; white-space: nowrap; }

/* ----------------------------- MÉTHODE ----------------------------- */
.steps { display: grid; grid-template-columns: repeat(4,1fr); gap: 18px; margin-top: 36px; }
.step { }
.step .n { font-family: var(--mono); color: var(--ocre-fonce); font-size: .85rem; letter-spacing:.1em; }
.step h3 { margin: 8px 0 4px; }
.step p { color: var(--muet); font-size: .93rem; margin: 0; }

/* --------------------------- POURQUOI NOUS ------------------------- */
.why-grid { display: grid; grid-template-columns: repeat(2,1fr); gap: 18px; margin-top: 36px; }
.why { display: flex; gap: 14px; }
.why .mark { flex: 0 0 auto; margin-top: 6px; }
.why h3 { font-size: 1.05rem; margin-bottom: 2px; }
.why p { color: var(--muet); font-size: .95rem; margin: 0; }

/* ------------------------------- FAQ ------------------------------- */
.faq { margin-top: 30px; }
details.faq-item {
  border-bottom: 1px solid var(--bord); padding: 6px 0;
}
details.faq-item summary {
  font-family: var(--sans); font-weight: 700; color: var(--petrol); font-size: 1.05rem;
  cursor: pointer; list-style: none; padding: 16px 0; display: flex; justify-content: space-between; gap: 16px;
}
details.faq-item summary::-webkit-details-marker { display: none; }
details.faq-item summary::after { content: "+"; font-family: var(--mono); color: var(--ocre); font-size: 1.3rem; line-height: 1; }
details.faq-item[open] summary::after { content: "–"; }
details.faq-item p { color: var(--muet); font-size: .97rem; margin: 0 0 16px; max-width: 70ch; }

/* ------------------------------ CTA -------------------------------- */
.final {
  background: var(--petrol); color: #EAF1F2; border: 0; text-align: center;
}
.final h2 { color: #fff; }
.final p { color: #B9D0D4; max-width: 54ch; margin: 0 auto 26px; font-size: 1.12rem; }
.final .contact {
  font-family: var(--mono); font-size: .9rem; color: #fff; margin-top: 26px;
  display: flex; gap: 8px 28px; justify-content: center; flex-wrap: wrap;
}
.final .contact span::before { content: "→ "; color: var(--ocre); }

/* ----------------------------- FOOTER ------------------------------ */
.foot { padding: 30px 0; border-top: 1px solid var(--bord); }
.foot .wrap { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px; }
.foot, .foot a { font-family: var(--mono); font-size: .78rem; color: var(--muet); text-decoration: none; }

/* ---------------------------- RESPONSIVE --------------------------- */
@media (max-width: 860px) {
  section { padding: 64px 0; }
  .nav .links a:not(.btn) { display: none; }
  .problems-grid, .services-grid, .steps, .why-grid { grid-template-columns: 1fr; }
  .uc { grid-template-columns: 1fr; }
  .uc .gain { text-align: left; }
  .hero { padding: 80px 0 70px; }
}
@media (max-width: 520px) {
  body { font-size: 16px; }
  .hero .reassure span { display: block; margin: 4px 0; }
}

/* respect des préférences de mouvement réduit */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; }
}