:root {
  --ink: #0e3b3a;        /* vert pétrole */
  --ink-2: #155250;
  --copper: #c66a2e;     /* cuivre (tuyauterie) */
  --copper-dark: #a5531f;
  --sand: #f3ece0;
  --sand-2: #e9dfcd;
  --paper: #fbf8f2;
  --text: #1f2a2a;
  --muted: #5e6b69;
  --line: #ddd3c2;
  --radius: 4px;
  --max: 1180px;
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, "Book Antiqua", Georgia, serif;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-family: var(--sans);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--paper); color: var(--text); line-height: 1.65; font-size: 16px; }
img, svg { max-width: 100%; }
a { color: var(--ink-2); }
h1, h2, h3 { font-family: var(--serif); font-weight: 600; line-height: 1.12; color: var(--ink); margin: 0 0 .5em; letter-spacing: -.01em; }
h1 { font-size: clamp(2.3rem, 5.4vw, 4rem); }
h2 { font-size: clamp(1.8rem, 3.6vw, 2.7rem); }
h3 { font-size: 1.3rem; }
p { margin: 0 0 1em; }
em.c { font-style: italic; color: var(--copper); }

.container { max-width: var(--max); margin: 0 auto; padding: 0 24px; }
section { padding: 96px 0; scroll-margin-top: 72px; }
.kicker { display: inline-flex; align-items: center; gap: 10px; font-size: .78rem; font-weight: 700; letter-spacing: .14em; text-transform: uppercase; color: var(--copper-dark); margin-bottom: 18px; }
.kicker::before { content: ""; width: 28px; height: 2px; background: currentColor; }
.lead { font-size: 1.12rem; color: var(--muted); max-width: 640px; }
.sec-head { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: end; margin-bottom: 56px; }
.sec-head .lead { margin: 0; }

/* Topbar + header */
.topbar { background: var(--ink); color: rgba(243,236,224,.8); font-size: .82rem; }
.topbar .container { display: flex; justify-content: space-between; gap: 16px; padding-top: 8px; padding-bottom: 8px; }
.topbar a { color: inherit; text-decoration: none; }
.header { position: sticky; top: 0; z-index: 50; background: rgba(251,248,242,.95); backdrop-filter: blur(8px); border-bottom: 1px solid var(--line); }
.header .container { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; color: var(--ink); }
.brand img { width: 38px; height: 38px; }
.brand b { font-family: var(--serif); font-size: 1.3rem; font-weight: 600; letter-spacing: -.01em; }
.brand small { display: block; font-size: .68rem; letter-spacing: .14em; text-transform: uppercase; color: var(--muted); font-weight: 600; margin-top: -2px; }
.nav { display: flex; gap: 30px; align-items: center; }
.nav a { text-decoration: none; color: var(--text); font-weight: 500; font-size: .95rem; }
.nav a:not(.btn):hover { color: var(--copper-dark); }
.nav-toggle { display: none; background: none; border: 1px solid var(--line); border-radius: var(--radius); width: 42px; height: 42px; font-size: 1.3rem; cursor: pointer; color: var(--ink); }

/* Buttons */
.btn { display: inline-flex; align-items: center; gap: 10px; background: var(--copper); color: #fff !important; padding: 14px 24px; border-radius: var(--radius); text-decoration: none; font-weight: 600; border: 0; cursor: pointer; font-size: 1rem; font-family: var(--sans); transition: background .15s, transform .15s; }
.btn:hover { background: var(--copper-dark); }
.btn .arr { transition: transform .15s; }
.btn:hover .arr { transform: translateX(3px); }
.btn-line { background: transparent; color: var(--ink) !important; border: 1.5px solid var(--ink); }
.btn-line:hover { background: var(--ink); color: var(--sand) !important; }
.btn-small { padding: 9px 16px; font-size: .9rem; }

/* Hero */
.hero { padding: 72px 0 0; position: relative; overflow: hidden; }
.hero-grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: 56px; align-items: center; }
.hero h1 { margin-bottom: .4em; }
.hero p.lead { font-size: 1.2rem; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 30px; }

.plan { position: relative; background: var(--ink); color: var(--sand); padding: 30px; border-radius: var(--radius);
  background-image: linear-gradient(rgba(243,236,224,.06) 1px, transparent 1px), linear-gradient(90deg, rgba(243,236,224,.06) 1px, transparent 1px);
  background-size: 22px 22px; box-shadow: 14px 14px 0 var(--copper); }
.plan-head { display: flex; justify-content: space-between; font-size: .72rem; letter-spacing: .14em; text-transform: uppercase; color: rgba(243,236,224,.6); border-bottom: 1px dashed rgba(243,236,224,.25); padding-bottom: 12px; margin-bottom: 8px; }
.plan ol { list-style: none; margin: 0; padding: 0; counter-reset: p; }
.plan li { counter-increment: p; display: flex; align-items: baseline; gap: 14px; padding: 11px 0; border-bottom: 1px solid rgba(243,236,224,.1); font-size: 1rem; }
.plan li:last-child { border-bottom: 0; }
.plan li::before { content: counter(p, decimal-leading-zero); font-family: var(--serif); color: var(--copper); font-size: .95rem; min-width: 22px; }
.plan li span { margin-left: auto; font-size: .72rem; color: rgba(243,236,224,.5); letter-spacing: .06em; }
.plan-foot { margin-top: 14px; font-size: .8rem; color: rgba(243,236,224,.6); }

.strip { margin-top: 88px; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); background: var(--sand); }
.strip .container { display: grid; grid-template-columns: repeat(4, 1fr); }
.strip .container > div { padding: 22px 20px; border-left: 1px solid var(--line); font-size: .92rem; color: var(--muted); }
.strip .container > div:first-child { border-left: 0; padding-left: 0; }
.strip strong { display: block; font-family: var(--serif); color: var(--ink); font-size: 1.1rem; font-weight: 600; }

/* Métiers */
.trades { border-top: 1px solid var(--ink); }
.trade { display: grid; grid-template-columns: 90px 1.1fr 1.4fr; gap: 32px; padding: 34px 0; border-bottom: 1px solid var(--line); transition: background .2s; }
.trade:hover { background: linear-gradient(90deg, transparent, var(--sand) 30%, transparent); }
.trade .num { font-family: var(--serif); font-size: 2.4rem; line-height: 1; color: var(--copper); }
.trade h3 { margin-bottom: .3em; }
.trade .tag { display: inline-block; font-size: .7rem; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; background: var(--ink); color: var(--sand); padding: 3px 8px; border-radius: 2px; margin-bottom: 10px; }
.trade p { color: var(--muted); margin: 0; }
.trade ul { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 8px; align-content: flex-start; }
.trade li { border: 1px solid var(--line); background: #fff; padding: 6px 12px; border-radius: 40px; font-size: .88rem; }

/* Dark section: approche */
.dark { background: var(--ink); color: rgba(243,236,224,.85); }
.dark h2, .dark h3 { color: var(--sand); }
.dark .lead { color: rgba(243,236,224,.7); }
.dark .kicker { color: var(--copper); }
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; counter-reset: s; }
.step { padding: 28px 26px 8px; border-left: 1px solid rgba(243,236,224,.15); counter-increment: s; }
.step::before { content: "Étape " counter(s); display: block; font-size: .72rem; letter-spacing: .14em; text-transform: uppercase; color: var(--copper); margin-bottom: 18px; }
.step h3 { font-size: 1.2rem; }
.step p { font-size: .95rem; margin: 0; }

.why { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 72px; }
.why div { background: rgba(243,236,224,.05); border: 1px solid rgba(243,236,224,.12); padding: 26px; border-radius: var(--radius); }
.why strong { display: block; color: var(--sand); font-family: var(--serif); font-size: 1.15rem; font-weight: 600; margin-bottom: 6px; }
.why span { font-size: .95rem; }

/* Zone */
.zone-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; }
.towns { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 26px; }
.towns span { padding: 8px 14px; border: 1px solid var(--ink); border-radius: 40px; font-size: .9rem; }
.towns span.home { background: var(--ink); color: var(--sand); }
.radar { width: 100%; aspect-ratio: 1; max-width: 440px; margin-left: auto; position: relative; }
.radar svg { width: 100%; height: 100%; }

/* FAQ */
.faq { background: var(--sand); }
.faq-list { max-width: 860px; }
.faq details { border-bottom: 1px solid var(--line); }
.faq details:first-child { border-top: 1px solid var(--ink); }
.faq summary { cursor: pointer; list-style: none; padding: 22px 40px 22px 0; font-family: var(--serif); font-size: 1.2rem; color: var(--ink); position: relative; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; position: absolute; right: 4px; top: 18px; font-size: 1.6rem; color: var(--copper); font-family: var(--sans); transition: transform .2s; }
.faq details[open] summary::after { transform: rotate(45deg); }
.faq details p { color: var(--muted); padding-bottom: 20px; margin: 0; max-width: 720px; }

/* Contact */
.contact-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: 64px; align-items: start; }
.info { list-style: none; padding: 0; margin: 30px 0; }
.info li { display: grid; grid-template-columns: 120px 1fr; gap: 12px; padding: 14px 0; border-bottom: 1px solid var(--line); }
.info small { font-size: .75rem; letter-spacing: .12em; text-transform: uppercase; color: var(--muted); font-weight: 600; padding-top: 3px; }
.map { border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; height: 240px; background: var(--sand); display: grid; place-items: center; text-align: center; padding: 20px; }
.map iframe { width: 100%; height: 100%; border: 0; }
.map p { color: var(--muted); font-size: .9rem; }

.form-card { background: #fff; border: 1px solid var(--line); border-top: 4px solid var(--copper); padding: 36px; border-radius: var(--radius); }
.form-card h3 { margin-bottom: 4px; }
.form-card > p { color: var(--muted); font-size: .95rem; }
fieldset { border: 0; padding: 0; margin: 0 0 20px; }
legend, form label.l { display: block; font-weight: 600; font-size: .88rem; margin-bottom: 8px; color: var(--ink); padding: 0; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chips label { cursor: pointer; }
.chips input { position: absolute; opacity: 0; pointer-events: none; }
.chips span { display: inline-block; padding: 8px 14px; border: 1px solid var(--line); border-radius: 40px; font-size: .88rem; background: var(--paper); transition: all .15s; }
.chips input:checked + span { background: var(--ink); border-color: var(--ink); color: var(--sand); }
.chips input:focus-visible + span { outline: 2px solid var(--copper); outline-offset: 2px; }
form .row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
form .field { margin-bottom: 18px; }
form input:not([type=checkbox]):not([type=radio]), form select, form textarea { width: 100%; padding: 12px 14px; border: 1px solid var(--line); border-radius: var(--radius); font: inherit; background: var(--paper); color: var(--text); }
form input:focus, form select:focus, form textarea:focus { outline: 2px solid rgba(198,106,46,.35); border-color: var(--copper); }
form textarea { min-height: 120px; resize: vertical; }
.check { display: flex; gap: 10px; align-items: flex-start; font-size: .86rem; color: var(--muted); margin-bottom: 20px; }
.check input { margin-top: 4px; }
.hp { position: absolute; left: -9999px; }
.form-status { margin-top: 14px; font-weight: 600; }
.form-status.ok { color: #1e7a3c; }
.form-status.err { color: #b3261e; }

/* Footer */
.footer { background: #0a2b2a; color: rgba(243,236,224,.7); padding: 72px 0 28px; font-size: .92rem; }
.footer-cta { display: flex; justify-content: space-between; align-items: center; gap: 24px; flex-wrap: wrap; padding-bottom: 48px; margin-bottom: 48px; border-bottom: 1px solid rgba(243,236,224,.12); }
.footer-cta h2 { color: var(--sand); margin: 0; font-size: clamp(1.6rem, 3vw, 2.3rem); }
.footer h4 { color: var(--sand); margin: 0 0 14px; font-size: .78rem; letter-spacing: .14em; text-transform: uppercase; }
.footer a { color: rgba(243,236,224,.7); text-decoration: none; }
.footer a:hover { color: var(--copper); }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 32px; }
.footer ul { list-style: none; padding: 0; margin: 0; }
.footer li { margin-bottom: 8px; }
.footer .brand { color: var(--sand); margin-bottom: 14px; }
.footer .brand small { color: rgba(243,236,224,.5); }
.footer-legal { border-top: 1px solid rgba(243,236,224,.12); margin-top: 44px; padding-top: 22px; font-size: .8rem; color: rgba(243,236,224,.5); display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.linklike { background: none; border: 0; padding: 0; color: rgba(243,236,224,.7); cursor: pointer; font: inherit; }
.linklike:hover { color: var(--copper); }

/* Legal pages */
.legal { padding: 64px 0 96px; }
.legal .container { max-width: 820px; }
.legal h2 { font-size: 1.5rem; margin-top: 1.8em; }
.legal table { width: 100%; border-collapse: collapse; margin: 1em 0; font-size: .95rem; background: #fff; }
.legal td, .legal th { border: 1px solid var(--line); padding: 10px 12px; text-align: left; vertical-align: top; }
.legal td { overflow-wrap: anywhere; }
.legal th { background: var(--sand); width: 38%; font-weight: 600; }
.legal .updated { color: var(--muted); font-size: .9rem; }

/* Cookie banner */
.cookie { position: fixed; left: 16px; bottom: 16px; max-width: 420px; background: var(--ink); color: rgba(243,236,224,.85); border-radius: var(--radius); padding: 22px; z-index: 100; display: none; font-size: .88rem; box-shadow: 0 16px 40px rgba(0,0,0,.25); }
.cookie.show { display: block; }
.cookie a { color: var(--copper); }
.cookie p { margin-bottom: 14px; }
.cookie .actions { display: flex; gap: 10px; flex-wrap: wrap; }
.cookie .btn-ghost { background: transparent; border: 1px solid rgba(243,236,224,.35); }
.cookie .btn-ghost:hover { background: rgba(243,236,224,.1); }

/* Reveal */
.js .reveal { opacity: 0; transform: translateY(18px); transition: opacity .6s ease, transform .6s ease; }
.js .reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { .js .reveal { opacity: 1; transform: none; transition: none; } html { scroll-behavior: auto; } }

/* Responsive */
@media (max-width: 960px) {
  .hero-grid, .zone-grid, .contact-grid, .sec-head { grid-template-columns: 1fr; gap: 40px; }
  .plan { margin-right: 14px; }
  .radar { margin: 0 auto; max-width: 360px; }
  .steps { grid-template-columns: 1fr 1fr; row-gap: 24px; }
  .why { grid-template-columns: 1fr; }
  .trade { grid-template-columns: 60px 1fr; }
  .trade ul { grid-column: 2; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .strip .container { grid-template-columns: 1fr 1fr; }
  .strip .container > div:nth-child(3) { border-left: 0; padding-left: 0; }
}
@media (max-width: 720px) {
  section { padding: 68px 0; }
  .container { padding: 0 16px; }
  .topbar .hide-sm { display: none; }
  .nav-toggle { display: block; }
  .nav { display: none; position: absolute; top: 72px; left: 0; right: 0; background: var(--paper); flex-direction: column; padding: 20px 16px; gap: 18px; border-bottom: 1px solid var(--line); align-items: flex-start; }
  .nav.open { display: flex; }
  .steps, form .row, .footer-grid, .strip .container { grid-template-columns: 1fr; }
  .strip .container > div { border-left: 0; padding-left: 0; border-top: 1px solid var(--line); }
  .strip .container > div:first-child { border-top: 0; }
  .trade { grid-template-columns: 1fr; gap: 12px; }
  .trade ul { grid-column: auto; }
  .info li { grid-template-columns: 1fr; gap: 2px; }
  .form-card { padding: 24px; }
  .cookie { right: 16px; max-width: none; }
}