:root {
  --petrol: #103f46;
  --petrol-deep: #082b31;
  --sage: #7f9e98;
  --gold: #c79a58;
  --sand: #eee9df;
  --ivory: #fbf9f4;
  --ink: #182e32;
  --muted: #66777a;
  --line: #d9d5ca;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--ivory); color: var(--ink); font-family: Arial, Helvetica, sans-serif; }
a { color: inherit; text-decoration: none; }
button, input, textarea { font: inherit; }
section { scroll-margin-top: 92px; }

/* Barre de navigation éditoriale */
.site-header {
  height: 92px; padding: 0 5vw; display: grid;
  grid-template-columns: 1fr auto 1fr; align-items: center; gap: 28px;
  position: sticky; top: 0; z-index: 50;
  background: rgba(251,249,244,.96); border-bottom: 1px solid var(--line);
  backdrop-filter: blur(14px);
}
.brand { display: flex; align-items: center; gap: 14px; }
.brand-mark { width: 48px; height: 48px; border-radius: 50%; display: grid; place-items: center; color: var(--ivory); background: var(--petrol); font-family: Georgia, serif; font-size: 13px; letter-spacing: .1em; }
.brand-mark b { font-weight: 400; }
.brand-copy { display: flex; flex-direction: column; gap: 3px; }
.brand-copy strong { font-family: Georgia, serif; font-size: 17px; font-weight: 400; }
.brand-copy small { color: var(--muted); font-size: 8px; text-transform: uppercase; letter-spacing: .15em; }
nav { display: flex; align-items: center; gap: clamp(16px, 2.3vw, 36px); }
nav a { position: relative; padding: 36px 0 32px; color: #52686b; font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: .08em; }
nav a::after { content: ""; position: absolute; left: 50%; right: 50%; bottom: 0; height: 3px; background: var(--gold); transition: .25s; }
nav a:hover::after { left: 0; right: 0; }
.header-cta { justify-self: end; padding: 14px 18px; color: var(--petrol); border: 1px solid var(--petrol); font-size: 10px; font-weight: 700; text-transform: uppercase; letter-spacing: .08em; }
.header-cta:hover { color: white; background: var(--petrol); }
.menu-toggle { display: none; }

/* Hero façon couverture de revue institutionnelle */
.hero {
  min-height: calc(100vh - 92px); position: relative; overflow: hidden;
  padding: clamp(80px, 9vw, 140px) 7vw 65px;
  display: grid; grid-template-columns: 1fr .42fr; grid-template-rows: 1fr auto;
  column-gap: 8vw; align-items: center; color: white; background: var(--petrol-deep);
}
.hero::before {
  content: ""; position: absolute; inset: 0 0 0 56%;
  background: linear-gradient(135deg, rgba(199,154,88,.22), transparent 45%), repeating-linear-gradient(112deg, transparent 0 34px, rgba(255,255,255,.035) 35px 36px);
  border-left: 1px solid rgba(255,255,255,.15); transform: skewX(-8deg); transform-origin: bottom;
}
.hero::after { content: "EXPERTISE"; position: absolute; right: -24px; top: 49%; transform: rotate(90deg); color: rgba(255,255,255,.06); font-family: Georgia, serif; font-size: 54px; letter-spacing: .18em; }
.hero-grid-lines { position: absolute; width: min(50vw, 720px); height: min(50vw, 720px); right: -12vw; bottom: -24vw; border: 1px solid rgba(199,154,88,.32); border-radius: 50%; box-shadow: 0 0 0 65px rgba(255,255,255,.018), 0 0 0 130px rgba(255,255,255,.012); }
.hero-content { position: relative; z-index: 2; }
.eyebrow { margin: 0 0 28px; color: var(--gold); font-size: 10px; font-weight: 700; text-transform: uppercase; letter-spacing: .23em; }
.eyebrow.light { color: #dbb57a; }
h1, h2 { margin: 0; font-family: Georgia, "Times New Roman", serif; font-weight: 400; letter-spacing: -.035em; }
h1 { max-width: 980px; font-size: clamp(52px, 7.5vw, 112px); line-height: .93; }
h1 em { display: inline-block; margin-top: 12px; color: #d7b478; font-weight: 400; }
.hero-lead { max-width: 660px; margin: 36px 0; color: #b9ced0; font-size: clamp(13px, 1.05vw, 16px); line-height: 1.65; }
.hero-actions { display: flex; align-items: center; gap: 32px; margin-top: 36px; }
.button { padding: 16px 21px; display: inline-flex; align-items: center; justify-content: space-between; gap: 30px; border: 0; cursor: pointer; font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: .08em; }
.button.primary { color: var(--petrol-deep); background: #d9b77e; }
.button.primary:hover { background: white; }
.text-link { padding-bottom: 8px; color: #d7e1e2; border-bottom: 1px solid #728f92; font-size: 11px; }
.hero-credentials { position: relative; z-index: 2; display: flex; flex-direction: column; }
.hero-credentials div { min-height: 122px; padding: 24px 0; display: grid; grid-template-columns: 40px 1fr; align-items: center; border-top: 1px solid rgba(255,255,255,.22); }
.hero-credentials div:last-child { border-bottom: 1px solid rgba(255,255,255,.22); }
.hero-credentials span { color: var(--gold); font-size: 10px; }
.hero-credentials strong { font-family: Georgia, serif; font-size: 17px; line-height: 1.35; font-weight: 400; }
.draft-mark { position: relative; z-index: 2; grid-column: 1 / -1; display: flex; align-items: center; gap: 14px; color: #809b9e; font-size: 9px; letter-spacing: .16em; }
.draft-mark i { height: 1px; flex: 1; background: linear-gradient(to right, #809b9e, transparent); }

.trust-strip { min-height: 72px; padding: 20px 5vw; display: flex; justify-content: center; align-items: center; gap: 3vw; color: var(--petrol); background: var(--sand); font-size: 9px; font-weight: 700; text-transform: uppercase; letter-spacing: .16em; }
.trust-strip span:nth-child(even) { color: var(--gold); }
.section { padding: clamp(85px, 10vw, 155px) 8vw; }
.section-heading h2, .contact h2 { font-size: clamp(43px, 5.3vw, 78px); line-height: 1.04; }

/* Profil très aéré */
.profile { display: grid; grid-template-columns: .7fr 1.3fr; gap: 10vw; background: var(--ivory); }
.profile .section-heading::after { content: ""; display: block; width: 90px; height: 1px; margin-top: 35px; background: var(--gold); }
.profile-copy { max-width: 860px; }
.large-copy { margin: 0 0 50px; color: var(--petrol); font-family: Georgia, serif; font-size: clamp(26px, 2.6vw, 40px); line-height: 1.42; }
.two-columns { display: grid; grid-template-columns: 1fr 1fr; gap: 45px; color: var(--muted); font-size: 14px; line-height: 1.85; }
blockquote { margin: 55px 0 0; padding: 30px 0 30px 36px; color: var(--petrol); border-left: 1px solid var(--gold); font-family: Georgia, serif; font-size: 21px; font-style: italic; }

/* Expertises en bandes horizontales */
.services { color: white; background: var(--petrol); }
.services .eyebrow { color: #dab679; }
.services .section-heading h2 { color: white; }
.section-heading.wide { display: flex; justify-content: space-between; align-items: flex-end; gap: 8vw; margin-bottom: 72px; }
.section-heading.wide > p { max-width: 430px; margin: 0; color: #a9c0c1; font-size: 14px; line-height: 1.75; }
.service-grid { border-top: 1px solid rgba(255,255,255,.22); }
.service-card { min-height: 170px; display: grid; grid-template-columns: 60px 90px .55fr 1fr; align-items: center; gap: 30px; border-bottom: 1px solid rgba(255,255,255,.22); transition: .25s; }
.service-card:hover { padding: 0 24px; color: var(--petrol-deep); background: var(--sand); }
.service-number { color: #d7b478; font-size: 10px; }
.service-symbol { color: #a7c4c4; font-family: Georgia, serif; font-size: 48px; text-align: center; }
.service-card h3 { margin: 0; font-family: Georgia, serif; font-size: clamp(20px, 2vw, 28px); font-weight: 400; }
.service-card p { margin: 0; color: #aac0c2; font-size: 13px; line-height: 1.75; }
.service-card:hover p { color: #607477; }

/* Agrément en composition centrale */
.standards { padding: clamp(95px, 11vw, 165px) 10vw; display: grid; grid-template-columns: .6fr 1.4fr; align-items: center; gap: 9vw; color: var(--ink); background: var(--sand); }
.uar-seal { width: 250px; height: 250px; display: flex; flex-direction: column; justify-content: center; align-items: center; border: 1px solid var(--gold); border-radius: 50%; outline: 1px solid rgba(199,154,88,.4); outline-offset: 12px; }
.uar-seal span { color: var(--petrol); font-family: Georgia, serif; font-size: 58px; letter-spacing: .1em; }
.uar-seal small { color: var(--muted); text-align: center; font-size: 8px; line-height: 1.6; text-transform: uppercase; letter-spacing: .16em; }
.standards h2 { color: var(--petrol); font-size: clamp(40px, 4.5vw, 68px); line-height: 1.08; }
.standards h2 em { color: #9b7138; font-weight: 400; }
.standards-copy > p:not(.eyebrow) { max-width: 760px; color: var(--muted); font-size: 14px; line-height: 1.85; }
.standards-list { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 30px; }
.standards-list span { padding: 11px 18px; color: var(--petrol); border: 1px solid #bdb5a6; font-size: 9px; font-weight: 700; text-transform: uppercase; letter-spacing: .14em; }

/* Méthode en cheminement */
.method { background: var(--ivory); }
.method .section-heading.wide > p { color: var(--muted); }
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; }
.steps article { min-height: 280px; padding: 32px 30px; border-top: 1px solid var(--gold); border-bottom: 1px solid var(--line); position: relative; }
.steps article::after { content: ""; position: absolute; right: -5px; top: -5px; width: 9px; height: 9px; border-radius: 50%; background: var(--gold); }
.steps article:last-child::after { right: 0; }
.step-top { color: #a87d43; font-size: 10px; }
.step-top i { display: none; }
.steps h3 { margin: 72px 0 15px; color: var(--petrol); font-family: Georgia, serif; font-size: 27px; font-weight: 400; }
.steps p { max-width: 220px; margin: 0; color: var(--muted); font-size: 13px; line-height: 1.65; }

/* Contact avec panneau sombre */
.contact { padding: clamp(85px, 10vw, 150px) 8vw; display: grid; grid-template-columns: 1fr .82fr; gap: 9vw; color: white; background: var(--petrol-deep); }
.contact h2 { color: white; }
.contact-intro > p:not(.eyebrow) { max-width: 550px; color: #a8bfc1; line-height: 1.75; }
.coverage { margin-top: 46px; padding-top: 25px; display: flex; flex-direction: column; gap: 9px; border-top: 1px solid #4b696c; }
.coverage span, .coverage small { color: #829da0; font-size: 9px; text-transform: uppercase; letter-spacing: .15em; }
.coverage strong { max-width: 570px; color: #e8dfd0; font-family: Georgia, serif; font-size: 17px; line-height: 1.55; font-weight: 400; }
.contact-form { padding: clamp(30px, 4vw, 52px); color: var(--ink); background: var(--ivory); }
.field { display: flex; flex-direction: column; gap: 9px; margin-bottom: 27px; }
.field label { color: var(--petrol); font-size: 9px; font-weight: 700; text-transform: uppercase; letter-spacing: .15em; }
.field input, .field textarea { width: 100%; padding: 12px 0; border: 0; border-bottom: 1px solid #b9b6ad; outline: 0; background: transparent; border-radius: 0; }
.field input:focus, .field textarea:focus { border-bottom-color: var(--gold); }
.field textarea { resize: vertical; }
.button.full { width: 100%; }
.form-note { color: var(--muted); font-size: 10px; line-height: 1.5; }

footer { padding: 45px 5vw; display: grid; grid-template-columns: 1fr 1fr; align-items: center; gap: 28px; color: #8ca3a5; background: #061f24; border-top: 1px solid #27464a; }
.footer-brand { display: flex; align-items: center; gap: 17px; color: white; }
.footer-brand > div { display: flex; flex-direction: column; gap: 4px; }
.footer-brand strong { font-family: Georgia, serif; font-size: 17px; font-weight: 400; }
.footer-brand small { color: #718d90; font-size: 8px; text-transform: uppercase; letter-spacing: .14em; }
.footer-links { display: flex; justify-content: flex-end; gap: 24px; font-size: 11px; }
footer > p { grid-column: 1 / -1; margin: 5px 0 0; padding-top: 24px; border-top: 1px solid #27464a; font-size: 9px; }
.mobile-actions { display: none; }

@media (max-width: 1050px) {
  .site-header { grid-template-columns: 1fr auto auto; }
  nav { position: fixed; inset: 92px 0 auto; padding: 28px 5vw; flex-direction: column; align-items: flex-start; gap: 0; background: var(--ivory); border-bottom: 1px solid var(--line); transform: translateY(-130%); transition: .25s; z-index: -1; }
  nav.is-open { transform: translateY(0); }
  nav a { width: 100%; padding: 11px 0; }
  .menu-toggle { display: flex; width: 40px; height: 40px; padding: 10px; border: 0; background: transparent; flex-direction: column; justify-content: center; gap: 7px; }
  .menu-toggle span { display: block; width: 100%; height: 1px; background: var(--petrol); transition: .2s; }
  .menu-toggle.is-open span:first-child { transform: translateY(4px) rotate(45deg); }
  .menu-toggle.is-open span:last-child { transform: translateY(-4px) rotate(-45deg); }
}

@media (max-width: 700px) {
  body { padding-bottom: 56px; }
  .site-header { height: 70px; padding: 0 18px; grid-template-columns: 1fr auto; }
  section { scroll-margin-top: 70px; }
  .brand-copy small, .header-cta { display: none; }
  .brand-mark { width: 42px; height: 42px; }
  nav { inset: 70px 0 auto; }
  .hero { min-height: auto; padding: 80px 24px 55px; grid-template-columns: 1fr; grid-template-rows: auto auto auto; row-gap: 48px; }
  .hero::before { inset: 55% -20% 0 20%; }
  h1 { font-size: clamp(45px, 14vw, 66px); }
  .hero-actions { flex-direction: column; align-items: flex-start; }
  .hero-credentials div { min-height: 90px; }
  .trust-strip { justify-content: flex-start; overflow: hidden; white-space: nowrap; padding-left: 24px; }
  .section { padding: 80px 24px; }
  .profile, .standards, .contact { grid-template-columns: 1fr; }
  .profile { gap: 55px; }
  .two-columns { grid-template-columns: 1fr; gap: 12px; }
  .section-heading.wide { flex-direction: column; align-items: flex-start; gap: 30px; }
  .service-card { min-height: 300px; padding: 30px 0; grid-template-columns: 35px 55px 1fr; grid-template-rows: auto auto; gap: 20px; }
  .service-card h3 { grid-column: 3; }
  .service-card p { grid-column: 2 / -1; }
  .standards { padding: 90px 24px; }
  .uar-seal { width: 185px; height: 185px; }
  .steps { grid-template-columns: 1fr; }
  .steps article { min-height: 190px; }
  .steps h3 { margin-top: 35px; }
  .contact { padding: 80px 24px; gap: 55px; }
  .contact-form { padding: 30px 23px; }
  footer { grid-template-columns: 1fr; padding: 40px 24px; }
  .footer-links { flex-direction: column; justify-content: flex-start; gap: 10px; }
  .mobile-actions { position: fixed; z-index: 60; left: 0; right: 0; bottom: 0; height: 56px; display: grid; grid-template-columns: repeat(3, 1fr); color: var(--petrol-deep); background: #d8b678; }
  .mobile-actions a { display: grid; place-items: center; border-right: 1px solid rgba(8,43,49,.22); font-size: 10px; font-weight: 700; text-transform: uppercase; letter-spacing: .08em; }
}

@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } * { transition: none !important; } }