/* ==========================================================================
   OMEGART — feuille de style du site public
   Palette et typographies dérivées du logo : bleu profond, bleu clair,
   blanc cassé ; Instrument Serif (titres), DM Sans (lecture), Space Mono (repères).
   ========================================================================== */

:root {
  --bleu-profond: #0A1628;
  --bleu-profond-2: #10203A;
  --bleu: #2563EB;
  --bleu-fonce: #1D4ED8;
  --bleu-clair: #7DD3FC;
  --blanc: #FAFAF9;
  --off: #F1F0EC;
  --noir: #111110;
  --gris: #55554F;
  --gris-clair: #8A8A84;
  --ligne: #E3E1DB;
  --ligne-dark: rgba(250, 250, 249, 0.16);
  --txt-dark-muted: rgba(250, 250, 249, 0.74);

  --serif: 'Instrument Serif', Georgia, 'Times New Roman', serif;
  --sans: 'DM Sans', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --mono: 'Space Mono', ui-monospace, 'SF Mono', Menlo, monospace;

  --r-sm: 10px;
  --r-md: 18px;
  --r-lg: 26px;
  --r-full: 999px;

  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --dur: 0.35s;

  --wrap: 1280px;
  --gutter: clamp(20px, 5vw, 64px);
  --sec: clamp(64px, 9vw, 128px);

  color-scheme: light;
}

/* --------------------------------------------------------------------------
   Base
   -------------------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.65;
  color: var(--noir);
  background: var(--blanc);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img, svg { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration-thickness: 1px; text-underline-offset: 3px; }
p { margin: 0 0 1em; }
ul, ol { margin: 0; padding: 0; }
h1, h2, h3, h4 { margin: 0; font-weight: 400; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
:focus-visible { outline: 2px solid var(--bleu); outline-offset: 3px; border-radius: 4px; }
.sec-dark :focus-visible, .site-footer :focus-visible, .site-header .nav-open :focus-visible { outline-color: var(--bleu-clair); }
::selection { background: var(--bleu-clair); color: var(--bleu-profond); }

.wrap { width: 100%; max-width: var(--wrap); margin: 0 auto; padding: 0 var(--gutter); }
.wrap-wide { width: 100%; max-width: 1440px; margin: 0 auto; padding: 0 var(--gutter); }
.skip { position: absolute; left: 16px; top: -60px; z-index: 100; padding: 10px 16px; background: var(--bleu-profond); color: var(--blanc); border-radius: var(--r-full); transition: top .2s; }
.skip:focus { top: 16px; }
.mono { font-family: var(--mono); font-size: 12px; letter-spacing: .12em; text-transform: uppercase; }
.muted { color: var(--gris); }
.sec-dark .muted { color: var(--txt-dark-muted); }
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.ic { width: 1.1em; height: 1.1em; display: inline-block; vertical-align: -0.18em; flex: none; }

/* --------------------------------------------------------------------------
   Typographie
   -------------------------------------------------------------------------- */
.h1 { font-family: var(--serif); font-size: clamp(42px, 6.6vw, 92px); line-height: 1.02; letter-spacing: -0.015em; margin-bottom: .25em; text-wrap: balance; }
.h1 em { font-style: italic; color: var(--bleu); }
.h1-serif { font-size: clamp(34px, 4.6vw, 64px); line-height: 1.1; max-width: 18ch; }
.h2 { font-family: var(--serif); font-size: clamp(32px, 4.2vw, 58px); line-height: 1.06; letter-spacing: -0.01em; text-wrap: balance; }
.h2-xl { font-size: clamp(38px, 5.4vw, 76px); }
.sur { color: var(--bleu); margin: 0 0 14px; }
.sec-dark .sur { color: var(--bleu-clair); }
.lead { font-size: clamp(18px, 1.5vw, 21px); line-height: 1.55; color: var(--gris); max-width: 60ch; }
.lead-light { color: var(--txt-dark-muted); }
.txt p, .bloc-txt p { max-width: 64ch; }
.lead-txt p { font-size: clamp(18px, 1.5vw, 21px); line-height: 1.6; }

/* --------------------------------------------------------------------------
   Boutons et liens
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 14px 24px; border-radius: var(--r-full);
  font-weight: 500; font-size: 15px; line-height: 1; text-decoration: none;
  border: 1px solid transparent; transition: background var(--dur) var(--ease), color var(--dur) var(--ease), border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.btn .ic { transition: transform var(--dur) var(--ease); }
.btn:hover .ic, .link-arrow:hover .ic, .pcard-link:hover .pcard-more .ic, .xcard:hover .ic, .client-link:hover .ic { transform: translateX(4px); }
.btn-dark { background: var(--noir); color: var(--blanc); }
.btn-dark:hover { background: var(--bleu); }
.btn-ghost { border-color: var(--noir); color: var(--noir); }
.btn-ghost:hover { border-color: var(--bleu); color: var(--bleu); }
.btn-light { background: var(--blanc); color: var(--bleu-profond); }
.btn-light:hover { background: var(--bleu-clair); }
.btn-ghost-light { border-color: rgba(250,250,249,.45); color: var(--blanc); }
.btn-ghost-light:hover { border-color: var(--bleu-clair); color: var(--bleu-clair); }
.acts { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.link-arrow { display: inline-flex; align-items: center; gap: 8px; font-weight: 500; text-decoration: none; color: var(--bleu); }
.link-arrow:hover { text-decoration: underline; }
.sec-dark .link-arrow { color: var(--bleu-clair); }
.link-back { display: inline-flex; align-items: center; gap: 8px; font-size: 14px; font-weight: 500; color: var(--gris); text-decoration: none; margin-bottom: 28px; }
.link-back:hover { color: var(--bleu); }

/* --------------------------------------------------------------------------
   En-tête
   -------------------------------------------------------------------------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(250, 250, 249, 0.86);
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--ligne);
}
.header-in { display: flex; align-items: center; justify-content: space-between; gap: 24px; height: 72px; }
.brand { display: inline-flex; align-items: center; gap: 12px; text-decoration: none; color: var(--noir); }
.brand-logo { width: 34px; height: 34px; color: var(--bleu-profond); }
.brand-name { font-family: var(--sans); font-weight: 600; letter-spacing: .14em; font-size: 15px; }
.brand:hover .logo-cercle { transform: rotate(18deg); }
.nav { display: flex; align-items: center; gap: 28px; }
.nav-list { display: flex; align-items: center; gap: 26px; list-style: none; }
.nav-link { font-size: 15px; font-weight: 500; text-decoration: none; color: var(--noir); padding: 6px 0; position: relative; }
.nav-link::after { content: ''; position: absolute; left: 0; right: 0; bottom: 0; height: 2px; background: var(--bleu); transform: scaleX(0); transform-origin: left; transition: transform var(--dur) var(--ease); }
.nav-link:hover::after, .nav-link[aria-current="page"]::after { transform: scaleX(1); }
.nav-cta { background: var(--noir); color: var(--blanc); padding: 10px 18px; border-radius: var(--r-full); }
.nav-cta::after { display: none; }
.nav-cta:hover, .nav-cta[aria-current="page"] { background: var(--bleu); }
.lang-switch { font-family: var(--mono); font-size: 12px; letter-spacing: .1em; text-decoration: none; border: 1px solid var(--ligne); border-radius: var(--r-full); padding: 7px 12px; color: var(--gris); }
.lang-switch:hover { border-color: var(--bleu); color: var(--bleu); }
.burger { display: none; align-items: center; gap: 10px; font-size: 14px; font-weight: 500; padding: 8px 0; }
.burger-ic { width: 22px; height: 14px; position: relative; }
.burger-ic i { position: absolute; left: 0; right: 0; height: 2px; background: currentColor; border-radius: 2px; transition: transform var(--dur) var(--ease), top var(--dur) var(--ease); }
.burger-ic i:first-child { top: 0; } .burger-ic i:last-child { top: 12px; }
.burger[aria-expanded="true"] .burger-ic i:first-child { top: 6px; transform: rotate(45deg); }
.burger[aria-expanded="true"] .burger-ic i:last-child { top: 6px; transform: rotate(-45deg); }

@media (max-width: 899px) {
  /* Pas de flou sur mobile : backdrop-filter créerait un bloc conteneur pour le menu fixe */
  .site-header { backdrop-filter: none; -webkit-backdrop-filter: none; background: var(--blanc); }
  .burger { display: inline-flex; }
  .nav {
    position: fixed; inset: 72px 0 0 0; z-index: 40;
    flex-direction: column; align-items: flex-start; justify-content: space-between;
    padding: 32px var(--gutter) 40px; background: var(--bleu-profond); color: var(--blanc);
    transform: translateY(-8px); opacity: 0; visibility: hidden; pointer-events: none;
    transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease), visibility 0s linear var(--dur);
  }
  .nav-open .nav { opacity: 1; visibility: visible; pointer-events: auto; transform: none; transition-delay: 0s; }
  .nav-list { flex-direction: column; align-items: flex-start; gap: 6px; width: 100%; }
  .nav-link { font-family: var(--serif); font-size: clamp(34px, 9vw, 52px); color: var(--blanc); padding: 6px 0; }
  .nav-link::after { height: 3px; background: var(--bleu-clair); }
  .nav-cta { background: transparent; color: var(--bleu-clair); padding: 6px 0; border-radius: 0; }
  .nav-cta:hover, .nav-cta[aria-current="page"] { background: transparent; }
  .lang-switch { color: var(--blanc); border-color: var(--ligne-dark); font-size: 14px; padding: 12px 20px; }
  .nav-open { overflow: hidden; }
}

/* --------------------------------------------------------------------------
   Logo animé
   -------------------------------------------------------------------------- */
.logo-svg { overflow: visible; }
.logo-cercle { transform-origin: 50% 50%; transition: transform .6s var(--ease); }
@media (prefers-reduced-motion: no-preference) {
  .logo-anime .logo-cercle { animation: logo-tourne 40s linear infinite; }
  .logo-anime .logo-vague { animation: logo-respire 6s ease-in-out infinite; transform-origin: 50% 50%; }
  .brand:hover .logo-cercle { animation-play-state: paused; }
}
@keyframes logo-tourne { to { transform: rotate(360deg); } }
@keyframes logo-respire { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-2px); } }

/* --------------------------------------------------------------------------
   Sections
   -------------------------------------------------------------------------- */
.sec { padding: var(--sec) 0; }
.sec-tight { padding-top: clamp(24px, 4vw, 48px); }
.sec-dark { background: var(--bleu-profond); color: var(--blanc); }
.sec-dark .h2 { color: var(--blanc); }
.sec-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 32px; margin-bottom: clamp(32px, 5vw, 64px); }
.sec-head .h2 { max-width: 20ch; }
.page-head { padding: clamp(40px, 7vw, 96px) 0 clamp(24px, 4vw, 48px); }
.page-lead { margin-top: 16px; }
.page-404 .btn { margin-top: 16px; }

/* Vague (motif du logo) */
.vague { color: var(--bleu-profond); height: 60px; margin-bottom: -1px; }
.vague svg { width: 100%; height: 100%; }

/* --------------------------------------------------------------------------
   Accueil — premier écran
   -------------------------------------------------------------------------- */
.hero { position: relative; overflow: hidden; background: var(--blanc); padding: clamp(56px, 9vw, 128px) 0 0; }
.hero-grid { display: grid; grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); align-items: center; gap: 48px; min-height: min(70vh, 720px); padding-bottom: clamp(48px, 8vw, 112px); }
.hero-sur { margin-bottom: 24px; }
.hero-lead { margin-top: 20px; }
.hero-visual { position: relative; height: 100%; min-height: 320px; }
.hero-logo { position: absolute; right: -18%; top: 50%; width: clamp(360px, 42vw, 640px); height: auto; transform: translateY(-50%); color: var(--bleu-clair); }
.hero-logo .logo-vague { color: var(--bleu); }
@media (max-width: 899px) {
  .hero-grid { grid-template-columns: 1fr; min-height: 0; }
  .hero-visual { min-height: 200px; order: -1; height: 220px; }
  .hero-logo { right: -30%; width: 300px; }
}

/* --------------------------------------------------------------------------
   Cartes projets
   -------------------------------------------------------------------------- */
.pgrid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: clamp(20px, 3vw, 36px); }
.pcard-large { grid-column: span 2; }
.pcard-link { display: block; text-decoration: none; color: inherit; height: 100%; }
.pcard-media { aspect-ratio: 4 / 3; border-radius: var(--r-md); overflow: hidden; background: var(--off); }
.pcard-large .pcard-media { aspect-ratio: 16 / 10; }
.pcard-img { width: 100%; height: 100%; object-fit: cover; transition: transform .8s var(--ease); }
.pcard-link:hover .pcard-img { transform: scale(1.025); }
.pcard-body { padding: 18px 4px 0; }
.pcard-meta { display: flex; justify-content: space-between; gap: 12px; color: var(--gris); margin: 0 0 10px; }
.pcard-title { font-family: var(--serif); font-size: clamp(26px, 2.6vw, 36px); line-height: 1.1; }
.pcard-large .pcard-title { font-size: clamp(30px, 3.4vw, 48px); }
.pcard-sub { color: var(--gris); margin: 6px 0 12px; max-width: 46ch; }
.pcard-more { display: inline-flex; align-items: center; gap: 8px; font-weight: 500; font-size: 15px; color: var(--bleu); }
.pgrid-n3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
@media (max-width: 899px) { .pgrid { grid-template-columns: repeat(2, minmax(0, 1fr)); } .pcard-large { grid-column: span 2; } }
@media (max-width: 599px) { .pgrid { grid-template-columns: 1fr; } .pcard-large { grid-column: auto; } .pcard-large .pcard-media { aspect-ratio: 4 / 3; } }

/* Cadrage (cercle ouvert du logo → coins de sélection) */
.frame { position: relative; }
.frame-c { position: absolute; width: 22px; height: 22px; border: 2px solid var(--bleu-clair); pointer-events: none; opacity: 0; transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease); }
.frame-tl { top: 12px; left: 12px; border-right: 0; border-bottom: 0; border-radius: 6px 0 0 0; transform: translate(6px, 6px); }
.frame-br { bottom: 12px; right: 12px; border-left: 0; border-top: 0; border-radius: 0 0 6px 0; transform: translate(-6px, -6px); }
.pcard-link:hover .frame-c, .pcard-link:focus-visible .frame-c { opacity: 1; transform: none; }
.frame-static .frame-c { opacity: .9; transform: none; }

/* --------------------------------------------------------------------------
   Expertises (accueil)
   -------------------------------------------------------------------------- */
.xgrid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; }
.xcard {
  display: flex; flex-direction: column; gap: 14px; min-height: 300px;
  padding: 32px 28px; border: 1px solid var(--ligne-dark); border-radius: var(--r-lg);
  text-decoration: none; color: var(--blanc);
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.xcard:hover { background: rgba(125, 211, 252, 0.08); border-color: var(--bleu-clair); transform: translateY(-3px); }
.xcard-num { color: var(--bleu-clair); }
.xcard-title { font-family: var(--serif); font-size: clamp(26px, 2.4vw, 34px); line-height: 1.1; }
.xcard-accroche { color: var(--txt-dark-muted); flex: 1; }
.xcard-more { display: inline-flex; align-items: center; gap: 8px; font-weight: 500; font-size: 15px; color: var(--bleu-clair); }
@media (max-width: 899px) { .xgrid { grid-template-columns: 1fr; } .xcard { min-height: 0; } }

/* --------------------------------------------------------------------------
   Méthode
   -------------------------------------------------------------------------- */
.steps { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 32px; list-style: none; counter-reset: none; }
.step { border-top: 1px solid var(--ligne); padding-top: 22px; }
.steps-dark .step { border-top-color: var(--ligne-dark); }
.step-num { display: block; color: var(--bleu); margin-bottom: 14px; }
.steps-dark .step-num { color: var(--bleu-clair); }
.step-title { font-family: var(--serif); font-size: 30px; line-height: 1.1; margin-bottom: 10px; }
.step-txt { color: var(--gris); font-size: 16px; margin: 0; }
.steps-dark .step-txt { color: var(--txt-dark-muted); }
@media (max-width: 899px) { .steps { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 599px) { .steps { grid-template-columns: 1fr; gap: 24px; } }

/* --------------------------------------------------------------------------
   À propos
   -------------------------------------------------------------------------- */
.sec-apropos { background: var(--off); }
.about-grid { display: grid; grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); gap: clamp(32px, 6vw, 96px); align-items: start; }
.about-grid-page { grid-template-columns: minmax(0, 7fr) minmax(0, 4fr); }
.about-portrait { border-radius: var(--r-md); overflow: hidden; margin-bottom: 24px; }
.about-portrait img { width: 100%; object-fit: cover; }
.about-symbol { width: min(100%, 320px); color: var(--bleu-profond); margin: 0 0 32px; }
.about-symbol .logo-vague { color: var(--bleu); }
.reperes { list-style: none; border-top: 1px solid var(--ligne); }
.reperes li { padding: 14px 0; border-bottom: 1px solid var(--ligne); display: flex; gap: 14px; }
.reperes li::before { content: ''; width: 10px; height: 10px; margin-top: 8px; border-radius: 50%; border: 2px solid var(--bleu); flex: none; }
@media (max-width: 899px) { .about-grid, .about-grid-page { grid-template-columns: 1fr; } }

/* --------------------------------------------------------------------------
   Confiance (clients)
   -------------------------------------------------------------------------- */
.clients { list-style: none; border-top: 1px solid var(--ligne); }
.client { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 2fr) auto; gap: 24px; align-items: center; padding: 22px 0; border-bottom: 1px solid var(--ligne); }
.client-nom { font-family: var(--serif); font-size: clamp(24px, 2.4vw, 32px); line-height: 1.1; }
.client-detail { color: var(--gris); }
.client-link { display: inline-flex; align-items: center; gap: 8px; font-weight: 500; font-size: 15px; color: var(--bleu); text-decoration: none; white-space: nowrap; }
.client-link:hover { text-decoration: underline; }
@media (max-width: 699px) { .client { grid-template-columns: 1fr; gap: 6px; } }

/* --------------------------------------------------------------------------
   Appel au contact
   -------------------------------------------------------------------------- */
.sec-cta { position: relative; overflow: hidden; }
.cta-grid { display: grid; grid-template-columns: minmax(0, 8fr) minmax(0, 4fr); gap: 32px; align-items: center; }
.cta-logo { position: relative; height: 100%; min-height: 200px; }
.cta-logo-svg { position: absolute; right: -25%; top: 50%; transform: translateY(-50%); width: clamp(260px, 30vw, 460px); color: rgba(125, 211, 252, 0.35); }
.cta-logo-svg .logo-vague { color: var(--bleu-clair); }
@media (max-width: 899px) { .cta-grid { grid-template-columns: 1fr; } .cta-logo { display: none; } }

/* --------------------------------------------------------------------------
   Étude de cas
   -------------------------------------------------------------------------- */
.bandeau { background: var(--bleu-clair); color: var(--bleu-profond); text-align: center; padding: 10px var(--gutter); }
.etude-head { padding: clamp(40px, 6vw, 80px) 0 clamp(28px, 4vw, 48px); }
.etude-cats { color: var(--gris); }
.etude-cats .sep { color: var(--ligne); margin: 0 4px; }
.etude-titre { margin-bottom: .15em; }
.etude-transfo { font-family: var(--serif); font-style: italic; font-size: clamp(24px, 3vw, 40px); line-height: 1.15; color: var(--bleu); max-width: 26ch; margin: 0; }
.etude-cover .frame { border-radius: var(--r-lg); overflow: hidden; background: var(--off); }
.etude-cover-img { width: 100%; max-height: 78vh; object-fit: cover; }
.etude-grid { display: grid; grid-template-columns: 260px minmax(0, 1fr); gap: clamp(32px, 6vw, 96px); padding-top: clamp(40px, 6vw, 80px); padding-bottom: clamp(40px, 6vw, 80px); }
.etude-side { position: sticky; top: 96px; align-self: start; }
.meta { margin: 0; border-top: 1px solid var(--ligne); }
.meta-row { padding: 14px 0; border-bottom: 1px solid var(--ligne); }
.meta-row dt { color: var(--gris); margin-bottom: 4px; }
.meta-row dd { margin: 0; font-size: 15px; }
.meta-row dd ul { list-style: none; } .meta-row dd li { padding: 3px 0; }
.etude-main { max-width: 800px; }
.bloc { margin-bottom: clamp(40px, 6vw, 72px); }
.bloc-h { display: flex; align-items: center; gap: 14px; color: var(--bleu); margin: 0 0 18px; }
.bloc-h::after { content: ''; flex: 1; height: 1px; background: var(--ligne); max-width: 120px; }
.sec-dark .bloc-h, .bloc-dark .bloc-h { color: var(--bleu-clair); }
.bloc-dark .bloc-h::after { background: var(--ligne-dark); }
.quote { margin: 0; font-family: var(--serif); font-size: clamp(26px, 3.2vw, 40px); line-height: 1.18; text-wrap: balance; }
.demarche { list-style: none; border-top: 1px solid var(--ligne); }
.demarche li { display: grid; grid-template-columns: 44px 1fr; gap: 12px; padding: 14px 0; border-bottom: 1px solid var(--ligne); }
.demarche-n { color: var(--bleu); padding-top: 5px; }
.bloc-dark { background: var(--bleu-profond); color: var(--blanc); padding: clamp(28px, 4vw, 44px); border-radius: var(--r-lg); }
.decisions { list-style: none; display: grid; gap: 14px; }
.decisions li { position: relative; padding-left: 28px; font-size: clamp(17px, 1.4vw, 20px); line-height: 1.5; }
.decisions li::before { content: ''; position: absolute; left: 0; top: .55em; width: 12px; height: 12px; border-radius: 50%; border: 2px solid var(--bleu-clair); border-right-color: transparent; transform: rotate(-40deg); }
.livrables { list-style: none; display: grid; gap: 10px; }
.livrables li { padding: 12px 16px; background: var(--off); border-radius: var(--r-sm); }
.demontre { font-family: var(--serif); font-size: clamp(24px, 2.8vw, 36px); line-height: 1.2; color: var(--bleu-profond); }
.fig { margin: 0 0 clamp(32px, 5vw, 56px); }
.fig .frame { border-radius: var(--r-md); overflow: hidden; background: var(--off); }
.fig img { width: 100%; }
.fig figcaption { font-size: 14px; color: var(--gris); padding: 12px 4px 0; max-width: 60ch; }
.galerie { display: grid; grid-template-columns: 1fr; gap: 0; }
.notice { padding: 16px 20px; border-radius: var(--r-md); background: var(--off); border-left: 4px solid var(--bleu); margin: 28px 0 0; }
.notice-ok { border-left-color: #15803d; }
.notice-err { border-left-color: #b91c1c; }
.notice ul { margin: 8px 0 0 18px; }
.suivant { padding-bottom: clamp(48px, 7vw, 96px); }
.suivant-link {
  display: grid; grid-template-columns: minmax(0, 1fr) 200px; gap: 24px; align-items: center;
  padding: 28px 32px; border: 1px solid var(--ligne); border-radius: var(--r-lg); text-decoration: none; color: inherit;
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}
.suivant-link:hover { border-color: var(--bleu); background: var(--off); }
.suivant-link .sur { grid-column: 1; margin-bottom: 8px; }
.suivant-titre { grid-column: 1; font-family: var(--serif); font-size: clamp(28px, 3.4vw, 44px); line-height: 1.05; display: inline-flex; align-items: center; gap: 12px; }
.suivant-sub { grid-column: 1; color: var(--gris); }
.suivant-img { grid-column: 2; grid-row: 1 / span 3; border-radius: var(--r-sm); overflow: hidden; aspect-ratio: 4/3; background: var(--off); }
.suivant-img img { width: 100%; height: 100%; object-fit: cover; }
@media (max-width: 899px) {
  .etude-grid { grid-template-columns: 1fr; }
  .etude-side { position: static; }
  .meta { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 0 24px; }
  .suivant-link { grid-template-columns: 1fr; }
  .suivant-img { grid-column: 1; grid-row: auto; max-width: 240px; }
}

/* --------------------------------------------------------------------------
   Expertises (page)
   -------------------------------------------------------------------------- */
.expertise { scroll-margin-top: 80px; border-top: 1px solid var(--ligne); }
.expertise-alt { background: var(--off); }
.expertise-grid { display: grid; grid-template-columns: minmax(0, 6fr) minmax(0, 5fr); gap: clamp(32px, 6vw, 96px); align-items: start; }
.expertise-alt .expertise-grid { direction: rtl; } .expertise-alt .expertise-grid > * { direction: ltr; }
.expertise-txt .bloc-h { margin-top: 32px; }
.expertise-txt .btn { margin-top: 32px; }
.points { list-style: none; display: grid; gap: 8px; }
.points li { display: flex; gap: 12px; }
.points li::before { content: ''; flex: none; width: 10px; height: 10px; margin-top: 9px; border-radius: 50%; border: 2px solid var(--bleu); border-right-color: transparent; transform: rotate(-40deg); }
.liens-projets { list-style: none; display: grid; gap: 8px; }
.expertise-media { position: sticky; top: 96px; }
.expertise-media .frame { border-radius: var(--r-lg); overflow: hidden; background: var(--off); }
@media (max-width: 899px) { .expertise-grid { grid-template-columns: 1fr; } .expertise-media { position: static; order: -1; } }

/* --------------------------------------------------------------------------
   Contact
   -------------------------------------------------------------------------- */
.contact-grid { display: grid; grid-template-columns: minmax(0, 7fr) minmax(0, 4fr); gap: clamp(32px, 6vw, 96px); align-items: start; }
.form { display: grid; gap: 20px; }
.form-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.field { display: grid; gap: 8px; }
.field label { font-weight: 500; font-size: 15px; }
.field input, .field select, .field textarea {
  font: inherit; width: 100%; padding: 14px 16px; border: 1px solid var(--ligne); border-radius: var(--r-sm);
  background: #fff; color: var(--noir); transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.field textarea { resize: vertical; min-height: 160px; }
.field input:focus, .field select:focus, .field textarea:focus { outline: 0; border-color: var(--bleu); box-shadow: 0 0 0 3px rgba(37, 99, 235, .18); }
.form-consent { font-size: 14px; color: var(--gris); margin: 0; }
.contact-side { border-left: 1px solid var(--ligne); padding-left: clamp(24px, 3vw, 48px); }
.contact-list { list-style: none; margin: 0 0 24px; display: grid; gap: 10px; }
.big-link { font-family: var(--serif); font-size: clamp(22px, 2.2vw, 30px); line-height: 1.2; text-decoration: none; overflow-wrap: anywhere; }
.big-link:hover { color: var(--bleu); }
@media (max-width: 899px) { .contact-grid { grid-template-columns: 1fr; } .contact-side { border-left: 0; padding-left: 0; border-top: 1px solid var(--ligne); padding-top: 32px; } }
@media (max-width: 599px) { .form-2 { grid-template-columns: 1fr; } }

/* --------------------------------------------------------------------------
   Pages légales
   -------------------------------------------------------------------------- */
.legal { max-width: 760px; }
.legal-h { font-family: var(--serif); font-size: 30px; margin: 40px 0 12px; }
.legal p { font-size: 16px; }
.legal-maj { margin-top: 48px; }

/* --------------------------------------------------------------------------
   Pied de page
   -------------------------------------------------------------------------- */
.site-footer { background: var(--bleu-profond); color: var(--blanc); padding: clamp(56px, 7vw, 96px) 0 32px; }
.footer-grid { display: grid; grid-template-columns: minmax(0, 1.6fr) repeat(3, minmax(0, 1fr)); gap: 40px; padding-bottom: 48px; border-bottom: 1px solid var(--ligne-dark); }
.footer-logo { width: 44px; color: var(--bleu-clair); margin-bottom: 20px; }
.footer-sign { font-size: 15px; color: var(--txt-dark-muted); }
.footer-sign strong { color: var(--blanc); letter-spacing: .14em; font-weight: 600; }
.footer-promise { font-family: var(--serif); font-size: 24px; line-height: 1.2; margin: 0; }
.footer-h { font-family: var(--mono); font-size: 12px; letter-spacing: .12em; text-transform: uppercase; color: var(--bleu-clair); margin-bottom: 16px; }
.footer-list { list-style: none; display: grid; gap: 8px; font-size: 15px; }
.footer-list a { text-decoration: none; color: var(--blanc); }
.footer-list a:hover { color: var(--bleu-clair); text-decoration: underline; }
.footer-muted { color: var(--txt-dark-muted); }
.footer-bottom { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px; padding-top: 24px; font-size: 14px; color: var(--txt-dark-muted); }
.footer-bottom p { margin: 0; }
@media (max-width: 899px) { .footer-grid { grid-template-columns: 1fr 1fr; } .footer-brand { grid-column: span 2; } }
@media (max-width: 599px) { .footer-grid { grid-template-columns: 1fr; } .footer-brand { grid-column: auto; } }

/* --------------------------------------------------------------------------
   Animations d'apparition et transitions entre pages
   -------------------------------------------------------------------------- */
@media (prefers-reduced-motion: no-preference) {
  .js .reveal { opacity: 0; transform: translateY(14px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
  .js .reveal.in { opacity: 1; transform: none; }
  .pgrid .pcard:nth-child(2).reveal { transition-delay: .08s; }
  .pgrid .pcard:nth-child(3).reveal { transition-delay: .16s; }
  .xgrid .xcard:nth-child(2) { transition-delay: .08s; }
  .xgrid .xcard:nth-child(3) { transition-delay: .16s; }
  .steps .step:nth-child(2) { transition-delay: .08s; }
  .steps .step:nth-child(3) { transition-delay: .16s; }
  .steps .step:nth-child(4) { transition-delay: .24s; }
  .hero-txt > * { animation: hero-in .8s var(--ease) both; }
  .hero-txt > :nth-child(2) { animation-delay: .08s; }
  .hero-txt > :nth-child(3) { animation-delay: .16s; }
  .hero-txt > :nth-child(4) { animation-delay: .24s; }
  .hero-logo { animation: hero-in 1.2s var(--ease) both; }
  @view-transition { navigation: auto; }
  ::view-transition-old(root) { animation: .25s ease-in both vt-out; }
  ::view-transition-new(root) { animation: .35s var(--ease) both vt-in; }
}
@keyframes hero-in { from { opacity: 0; transform: translateY(16px); } to { opacity: 1; transform: none; } }
@keyframes vt-out { to { opacity: 0; } }
@keyframes vt-in { from { opacity: 0; transform: translateY(8px); } }
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition-duration: .01ms !important; }
  html { scroll-behavior: auto; }
}

/* Impression */
@media print {
  .site-header, .site-footer, .sec-cta, .suivant, .burger { display: none; }
  body { color: #000; background: #fff; }
}