/* ================================================================
   KIEFFER & LANSER — « Minéral institutionnel »
   Calcaire clair · chapitres vert-encre · filets laiton
   Motif signature : la ligne de cote d'architecte
   Design system partagé — toutes les pages du site
   ================================================================ */
:root{
  /* Couleurs */
  --color-bg:#F2EFE9;
  --color-surface:#EAE5DA;
  --color-card:#FAF8F3;
  --color-ink:#1C2620;
  --color-fg-muted:#59615A;
  --color-dark:#1B2420;
  --color-dark-2:#242F28;
  --color-fg-on-dark:#EDE9DF;
  --color-muted-on-dark:#A9B2A6;
  --color-accent:#A0713C;
  --color-accent-deep:#7E5627;
  --color-accent-hover:#B8854B;

  /* Filets & trames */
  --line:rgba(28,38,32,.14);
  --line-strong:rgba(28,38,32,.32);
  --line-faint:rgba(28,38,32,.055);
  --line-on-dark:rgba(237,233,223,.16);
  --line-faint-on-dark:rgba(237,233,223,.05);
  --nav-bg:rgba(242,239,233,.86);
  --shadow-plaque:0 24px 60px -18px rgba(28,38,32,.35);
  --shadow-card:0 18px 44px -20px rgba(28,38,32,.22);

  /* Typographie */
  --font-display:"Fraunces",Georgia,serif;
  --font-body:"Hanken Grotesk",Verdana,sans-serif;
  --font-mono:"Spline Sans Mono",monospace;

  --fs-hero:clamp(2.55rem,6.4vw,4.9rem);
  --fs-page-hero:clamp(2.3rem,5.4vw,4.1rem);
  --fs-h2:clamp(1.9rem,4.4vw,3.15rem);
  --fs-h3:clamp(1.25rem,2.2vw,1.6rem);
  --fs-body:clamp(1rem,1.15vw,1.075rem);
  --fs-small:.875rem;
  --fs-label:.72rem;

  /* Espace */
  --space:.5rem;
  --section-pad:clamp(4.5rem,10vw,8.75rem);
  --section-pad-sm:clamp(3rem,6vw,5.25rem);
  --gutter:clamp(1.25rem,4vw,3rem);
  --container-max:78rem;

  /* Mouvement — retenue raffinée */
  --ease:cubic-bezier(.16,1,.3,1);
  --ease-back:cubic-bezier(.34,1.4,.44,1);
  --dur:.45s;
  --dur-slow:.9s;
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;scroll-padding-top:6rem}
body{
  font-family:var(--font-body);
  font-size:var(--fs-body);
  line-height:1.65;
  color:var(--color-ink);
  background:var(--color-bg);
  -webkit-font-smoothing:antialiased;
  overflow-x:clip;
}
::selection{background:var(--color-accent);color:var(--color-bg)}
img{display:block;max-width:100%}
a{color:inherit}
button{font:inherit;cursor:pointer}
:focus-visible{outline:2px solid var(--color-accent);outline-offset:3px;border-radius:1px}

/* Grain d'ensemble */
body::after{
  content:"";position:fixed;inset:0;z-index:2000;pointer-events:none;opacity:.05;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='2'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)' opacity='.55'/%3E%3C/svg%3E");
}

.container{width:min(100% - 2*var(--gutter),var(--container-max));margin-inline:auto}
.container-narrow{width:min(100% - 2*var(--gutter),52rem);margin-inline:auto}
.hero-grid>*,.cabinet-grid>*,.apports-grid>*,.contact-grid>*,.methode-bloc>*,.projets-grid>*,.page-hero-grid>*{min-width:0}

.skip-link{
  position:fixed;top:-4rem;left:1rem;z-index:3000;padding:.7rem 1.2rem;
  background:var(--color-ink);color:var(--color-bg);font-size:var(--fs-small);
  text-decoration:none;transition:top var(--dur) var(--ease);
}
.skip-link:focus{top:1rem}

/* ================= Motif signature : ligne de cote ================= */
.cote{display:flex;align-items:center;gap:1.1rem;color:var(--color-fg-muted)}
.cote-line{position:relative;flex:1;height:1px;background:var(--line-strong)}
.cote-line::before,.cote-line::after{
  content:"";position:absolute;top:-4px;width:1px;height:9px;background:var(--line-strong);
}
.cote-line::before{left:0}
.cote-line::after{right:0}
.cote-txt{
  font-family:var(--font-mono);font-size:clamp(.6rem,1.9vw,.72rem);letter-spacing:.12em;
  text-transform:uppercase;white-space:nowrap;
}
.cote--brass .cote-line,.cote--brass .cote-line::before,.cote--brass .cote-line::after{background:var(--color-accent)}
.cote--brass{color:var(--color-accent-deep)}
.on-dark .cote{color:var(--color-muted-on-dark)}
.on-dark .cote-line,.on-dark .cote-line::before,.on-dark .cote-line::after{background:var(--line-on-dark)}

/* Fil d'ariane (réutilise la cote) */
.breadcrumb{margin-bottom:1.7rem}
.breadcrumb a{color:inherit;text-decoration:none;border-bottom:1px solid transparent;padding-bottom:1px;transition:border-color var(--dur) var(--ease)}
.breadcrumb a:hover{border-color:var(--color-fg-muted)}

/* Labels éditoriaux de section */
.label{
  display:inline-flex;align-items:center;gap:.9rem;
  font-family:var(--font-mono);font-size:var(--fs-label);font-weight:500;
  letter-spacing:.18em;text-transform:uppercase;color:var(--color-accent-deep);
}
.label::before{
  content:"";width:2.6rem;height:1px;background:var(--color-accent);
  box-shadow:0 -4px 0 0 transparent;position:relative;
}
.on-dark .label{color:var(--color-accent-hover)}

/* Cadre à équerres (repères de plan) */
.frame{position:relative}
.frame::before,.frame::after{
  content:"";position:absolute;width:1.7rem;height:1.7rem;z-index:2;
  border-color:var(--color-accent);border-style:solid;
}
.frame::before{top:-.55rem;left:-.55rem;border-width:1px 0 0 1px}
.frame::after{bottom:-.55rem;right:-.55rem;border-width:0 1px 1px 0}

/* Révélations au défilement */
.rv{opacity:0;transform:translateY(30px);transition:opacity var(--dur-slow) var(--ease),transform var(--dur-slow) var(--ease)}
.rv.in{opacity:1;transform:none}
.rv-d1{transition-delay:.1s}
.rv-d2{transition-delay:.22s}
.rv-d3{transition-delay:.34s}

/* ================= Navigation ================= */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:1000;
  transition:background var(--dur) var(--ease),border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
  border-bottom:1px solid transparent;
}
.nav.scrolled{background:var(--nav-bg);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-bottom-color:var(--line)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:1.5rem;padding:1.05rem 0}
.brand{display:flex;flex-direction:column;text-decoration:none;line-height:1.15}
.brand-name{font-family:var(--font-display);font-weight:560;font-size:1.22rem;letter-spacing:.01em}
.brand-sub{font-family:var(--font-mono);font-size:.6rem;letter-spacing:.26em;text-transform:uppercase;color:var(--color-fg-muted);margin-top:.2rem;white-space:nowrap}
.nav-links{display:none;align-items:center;gap:1.9rem;list-style:none}
.nav-links a{
  position:relative;text-decoration:none;font-size:.94rem;font-weight:500;padding:.35rem 0;
}
.nav-links a::after{
  content:"";position:absolute;left:0;bottom:0;height:1px;width:0;
  background:var(--color-accent);transition:width var(--dur) var(--ease);
}
.nav-links a:hover::after{width:100%}
.nav-links a[aria-current="page"]{color:var(--color-accent-deep)}
.nav-links a[aria-current="page"]::after{width:100%}
a.nav-cta{display:none}
.burger{
  display:flex;flex-direction:column;justify-content:center;gap:6px;
  width:48px;height:48px;padding:12px;background:none;border:1px solid var(--line-strong);border-radius:2px;
}
.burger span{display:block;height:1.5px;background:var(--color-ink);transition:transform var(--dur) var(--ease),opacity var(--dur) var(--ease)}
.burger[aria-expanded="true"] span:first-child{transform:translateY(3.75px) rotate(45deg)}
.burger[aria-expanded="true"] span:last-child{transform:translateY(-3.75px) rotate(-45deg)}
.burger[aria-expanded="true"] span{background:var(--color-fg-on-dark)}
.burger[aria-expanded="true"]{border-color:var(--line-on-dark);position:relative;z-index:1200}

/* Menu mobile plein écran */
.mobile-menu{
  position:fixed;inset:0;z-index:1100;background:var(--color-dark);color:var(--color-fg-on-dark);
  display:flex;flex-direction:column;justify-content:center;padding:6rem var(--gutter) 2rem;
  opacity:0;visibility:hidden;transition:opacity var(--dur) var(--ease),visibility 0s linear var(--dur);
  overflow-y:auto;
}
.mobile-menu.open{opacity:1;visibility:visible;transition-delay:0s}
.mobile-menu nav ul{list-style:none;display:flex;flex-direction:column;gap:.3rem}
.mobile-menu nav a{
  display:flex;align-items:baseline;gap:1rem;text-decoration:none;padding:.5rem 0;
  font-family:var(--font-display);font-weight:480;font-size:clamp(1.7rem,7vw,2.6rem);
  opacity:0;transform:translateY(18px);
  transition:opacity .6s var(--ease),transform .6s var(--ease),color var(--dur) var(--ease);
}
.mobile-menu.open nav a{opacity:1;transform:none}
.mobile-menu.open nav li:nth-child(1) a{transition-delay:.06s}
.mobile-menu.open nav li:nth-child(2) a{transition-delay:.12s}
.mobile-menu.open nav li:nth-child(3) a{transition-delay:.18s}
.mobile-menu.open nav li:nth-child(4) a{transition-delay:.24s}
.mobile-menu.open nav li:nth-child(5) a{transition-delay:.3s}
.mobile-menu nav a:hover{color:var(--color-accent-hover)}
.mobile-menu nav a[aria-current="page"]{color:var(--color-accent-hover)}
.mobile-menu nav a .idx{font-family:var(--font-mono);font-size:.7rem;color:var(--color-accent-hover);letter-spacing:.1em}
.mobile-menu-foot{
  margin-top:2.5rem;padding-top:1.5rem;border-top:1px solid var(--line-on-dark);
  font-family:var(--font-mono);font-size:.78rem;letter-spacing:.06em;color:var(--color-muted-on-dark);
  display:flex;flex-direction:column;gap:.4rem;
}
.mobile-menu-foot a{color:inherit;text-decoration:none}
.mobile-menu-foot a:hover{color:var(--color-accent-hover)}

/* ================= Boutons ================= */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.7rem;
  min-height:48px;padding:.85rem 1.8rem;border:1px solid var(--color-ink);border-radius:2px;
  background:var(--color-ink);color:var(--color-bg);text-decoration:none;
  font-weight:600;font-size:.95rem;letter-spacing:.01em;
  transition:background var(--dur) var(--ease),border-color var(--dur) var(--ease),transform var(--dur) var(--ease);
}
.btn:hover{background:var(--color-accent);border-color:var(--color-accent);transform:translateY(-2px)}
.btn-ghost{
  display:inline-flex;align-items:center;gap:.6rem;min-height:48px;padding:.85rem .2rem;
  background:none;border:none;color:var(--color-ink);text-decoration:none;font-weight:600;font-size:.95rem;
  position:relative;
}
.btn-ghost::after{
  content:"";position:absolute;left:0;bottom:.55rem;height:1px;width:100%;
  background:var(--line-strong);transition:background var(--dur) var(--ease);
}
.btn-ghost .arr{transition:transform var(--dur) var(--ease);color:var(--color-accent-deep)}
.btn-ghost:hover .arr{transform:translateX(6px)}
.btn-ghost:hover::after{background:var(--color-accent)}
.on-dark .btn{background:var(--color-fg-on-dark);border-color:var(--color-fg-on-dark);color:var(--color-dark)}
.on-dark .btn:hover{background:var(--color-accent-hover);border-color:var(--color-accent-hover);color:var(--color-dark)}
.on-dark .btn-ghost{color:var(--color-fg-on-dark)}
.on-dark .btn-ghost::after{background:var(--line-on-dark)}

/* ================= Hero (accueil) ================= */
.hero{
  position:relative;padding-top:clamp(7.5rem,16vh,10.5rem);padding-bottom:var(--section-pad);
  overflow:clip;
}
.hero::before,.page-hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    linear-gradient(var(--line-faint) 1px,transparent 1px),
    linear-gradient(90deg,var(--line-faint) 1px,transparent 1px);
  background-size:76px 76px;
  mask-image:linear-gradient(to bottom,black 0%,black 55%,transparent 95%);
  -webkit-mask-image:linear-gradient(to bottom,black 0%,black 55%,transparent 95%);
}
.hero-grid{position:relative;display:grid;gap:3rem}
.hero-copy{max-width:38rem}
.hero h1{
  font-family:var(--font-display);font-weight:480;font-size:var(--fs-hero);
  line-height:1.06;letter-spacing:-.015em;margin:1.6rem 0 1.5rem;
  text-wrap:balance;
}
.hero h1 em,.page-hero h1 em{font-style:italic;font-weight:420;color:var(--color-accent-deep)}
.hero-sub{color:var(--color-fg-muted);max-width:33rem;margin-bottom:2.2rem}
.hero-ctas{display:flex;flex-wrap:wrap;gap:1.4rem;align-items:center;margin-bottom:3rem}
.hero .cote{max-width:30rem}

.hero-visual{position:relative}
.hero-img{position:relative;overflow:hidden;border-radius:2px;box-shadow:var(--shadow-card)}
.hero-img img{width:100%;height:clamp(20rem,52vw,34rem);object-fit:cover}
.hero-img--sm img{height:clamp(15rem,36vw,23rem)}
.plaque{
  position:absolute;left:calc(-1 * clamp(.75rem,3vw,2.6rem));bottom:clamp(1.2rem,4vw,2.4rem);z-index:3;
  background:var(--color-dark);color:var(--color-fg-on-dark);
  padding:1.15rem 1.45rem 1.05rem;border-radius:2px;box-shadow:var(--shadow-plaque);
  max-width:15.5rem;
}
.plaque-ref{font-family:var(--font-mono);font-size:.62rem;letter-spacing:.2em;text-transform:uppercase;color:var(--color-muted-on-dark);margin-bottom:.55rem}
.plaque-val{font-family:var(--font-display);font-size:2.7rem;font-weight:480;line-height:1;display:flex;align-items:baseline;gap:.5rem}
.plaque-val small{font-family:var(--font-mono);font-size:.7rem;letter-spacing:.08em;color:var(--color-accent-hover)}
.plaque-cap{font-size:.8rem;color:var(--color-muted-on-dark);margin-top:.5rem;line-height:1.45}

/* Barre de preuve (stats) */
.hero-stats{
  margin-top:clamp(3rem,7vw,4.5rem);border-top:1px solid var(--line);
  display:grid;grid-template-columns:1fr;gap:0;
}
.hero-stats--tight{margin-top:clamp(2rem,4vw,2.75rem)}
.stat{padding:1.5rem 0;border-bottom:1px solid var(--line);display:flex;flex-direction:column;gap:.15rem}
.stat-num{
  font-family:var(--font-display);font-weight:480;font-size:clamp(2.1rem,4.6vw,3rem);line-height:1;
  font-variant-numeric:tabular-nums;
}
.stat-num sup{font-size:.45em;color:var(--color-accent-deep);font-family:var(--font-mono)}
.stat-lbl{font-family:var(--font-mono);font-size:var(--fs-label);letter-spacing:.14em;text-transform:uppercase;color:var(--color-fg-muted)}

/* ================= Page-hero (pages intérieures) ================= */
.page-hero{position:relative;padding-top:clamp(7.5rem,16vh,10.25rem);padding-bottom:clamp(3rem,6vw,5rem);overflow:clip}
.page-hero-inner{position:relative;max-width:44rem}
.page-hero h1{
  font-family:var(--font-display);font-weight:480;font-size:var(--fs-page-hero);
  line-height:1.08;letter-spacing:-.012em;margin:1.3rem 0 1.2rem;text-wrap:balance;
}
.page-hero-lede{color:var(--color-fg-muted);max-width:37rem}
.page-hero--split .page-hero-grid{position:relative;display:grid;gap:2.5rem;align-items:start}
.page-hero-media{position:relative}
.page-hero-media img{width:100%;height:clamp(15rem,38vw,23rem);object-fit:cover;border-radius:2px}
@media (min-width:1024px){
  .page-hero--split .page-hero-grid{grid-template-columns:6fr 6fr;gap:clamp(2.5rem,5vw,4.25rem);align-items:center}
}

/* ================= Sections génériques ================= */
.section{padding-block:var(--section-pad)}
.section-sm{padding-block:var(--section-pad-sm)}
.section-head{margin-bottom:clamp(2.5rem,6vw,4.5rem)}
h2{
  font-family:var(--font-display);font-weight:480;font-size:var(--fs-h2);
  line-height:1.12;letter-spacing:-.01em;margin-top:1.3rem;text-wrap:balance;
}
h2 em{font-style:italic;font-weight:420;color:var(--color-accent-deep)}
.on-dark h2 em{color:var(--color-accent-hover)}
.lede{color:var(--color-fg-muted);max-width:36rem;margin-top:1.2rem}

/* ================= Le cabinet (bloc watermark) ================= */
.cabinet{position:relative;background:var(--color-surface);border-block:1px solid var(--line);overflow:clip}
.watermark{
  position:absolute;right:-2rem;top:-1.5rem;z-index:0;pointer-events:none;user-select:none;
  font-family:var(--font-display);font-weight:560;font-size:clamp(9rem,24vw,20rem);
  line-height:1;color:var(--color-ink);opacity:.035;
}
.cabinet-grid{position:relative;display:grid;gap:2.5rem;z-index:1}
.cabinet-grid--center{align-items:center}
.cabinet-copy p{color:var(--color-fg-muted);margin-bottom:1.2rem;max-width:36rem}
.cabinet-copy p strong{color:var(--color-ink);font-weight:600}
.cabinet-figure{position:relative;margin-top:clamp(2.5rem,6vw,4rem)}
.cabinet-figure img{width:100%;height:clamp(15rem,42vw,29rem);object-fit:cover;border-radius:2px}
.cabinet-figure figcaption{
  display:flex;align-items:center;gap:1rem;margin-top:1rem;
  font-family:var(--font-mono);font-size:var(--fs-label);letter-spacing:.12em;text-transform:uppercase;color:var(--color-fg-muted);
}
.cabinet-figure figcaption::after{content:"";flex:1;height:1px;background:var(--line)}

/* ================= Apports / listes numérotées (sidebar sticky) ================= */
.apports-grid{display:grid;gap:3rem}
.apports-side{align-self:start}
.apports-side p{color:var(--color-fg-muted);margin:1.2rem 0 2rem;max-width:26rem}
.apport{
  position:relative;border-top:1px solid var(--line);padding:1.9rem 0 2.1rem;
  display:grid;gap:.7rem;transition:padding-left var(--dur) var(--ease);
}
.apport:last-child{border-bottom:1px solid var(--line)}
.apport::before{
  content:"";position:absolute;left:0;top:-1px;height:1px;width:0;
  background:var(--color-accent);transition:width .7s var(--ease);
}
.apport:hover::before{width:100%}
.apport:hover{padding-left:.9rem}
.apport-num{font-family:var(--font-mono);font-size:.75rem;letter-spacing:.18em;color:var(--color-accent-deep)}
.apport h3{font-family:var(--font-display);font-weight:520;font-size:var(--fs-h3);line-height:1.2}
.apport p{color:var(--color-fg-muted);max-width:34rem}

/* ================= Réalisations (grille asymétrique, motif répétable) ================= */
.projets-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:1.5rem}
.projets-note{font-family:var(--font-mono);font-size:var(--fs-label);letter-spacing:.12em;text-transform:uppercase;color:var(--color-fg-muted);max-width:16rem;line-height:1.8}
.projets-grid{display:grid;gap:clamp(2.5rem,5vw,3.5rem);margin-top:clamp(2.5rem,6vw,4rem)}
.projet{display:block;text-decoration:none}
.projet-media{position:relative;overflow:hidden;border-radius:2px}
.projet-media img{
  width:100%;object-fit:cover;filter:saturate(.82);
  transition:transform 1.1s var(--ease),filter 1.1s var(--ease);
}
.projet-media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(to top,rgba(27,36,32,.55),transparent 55%);
  opacity:0;transition:opacity var(--dur-slow) var(--ease);
}
.projet:hover .projet-media img{transform:scale(1.04);filter:saturate(1)}
.projet:hover .projet-media::after{opacity:1}
.projet-tag{
  position:absolute;top:1rem;left:1rem;z-index:2;
  font-family:var(--font-mono);font-size:.62rem;letter-spacing:.18em;text-transform:uppercase;
  background:var(--color-card);color:var(--color-ink);padding:.4rem .7rem;border-radius:2px;
}
.projet-body{padding-top:1.3rem}
.projet-titlerow{display:flex;align-items:baseline;justify-content:space-between;gap:1rem}
.projet h3{font-family:var(--font-display);font-weight:520;font-size:var(--fs-h3)}
.projet-lieu{font-family:var(--font-mono);font-size:var(--fs-label);letter-spacing:.12em;text-transform:uppercase;color:var(--color-fg-muted);white-space:nowrap}
.projet .cote{margin-top:1.1rem}
.projet:hover .cote-txt{color:var(--color-accent-deep)}
.projet-tall img{height:clamp(18rem,60vw,33rem)}
.projet-wide img{height:clamp(15rem,48vw,26rem)}
/* Rythme asymétrique répétable par blocs de 4 (desktop uniquement — cf. media query 768px) */

/* Grille d'articles (cartes égales, réutilise .projet) */
.articles-grid{display:grid;gap:clamp(2rem,4vw,2.75rem);margin-top:clamp(2.5rem,6vw,4rem)}
@media (min-width:768px){.articles-grid{grid-template-columns:repeat(3,1fr)}}
.articles-grid .projet-media img{height:clamp(12rem,26vw,16rem)}

/* ================= Méthode / étapes (réutilisable clair + sombre) ================= */
.methode{position:relative;overflow:clip}
.methode.on-dark{background:var(--color-dark);color:var(--color-fg-on-dark)}
.methode::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    linear-gradient(var(--line-faint) 1px,transparent 1px),
    linear-gradient(90deg,var(--line-faint) 1px,transparent 1px);
  background-size:76px 76px;
}
.methode.on-dark::before{
  background-image:
    linear-gradient(var(--line-faint-on-dark) 1px,transparent 1px),
    linear-gradient(90deg,var(--line-faint-on-dark) 1px,transparent 1px);
}
.methode .lede{color:var(--color-fg-muted)}
.methode.on-dark .lede{color:var(--color-muted-on-dark)}
.methode-blocs{display:grid;gap:clamp(3.5rem,8vw,5.5rem);position:relative}
.methode-bloc{display:grid;gap:2.2rem;align-items:center}
.methode-fig{position:relative}
.methode-fig img{width:100%;height:clamp(14rem,44vw,24rem);object-fit:cover;border-radius:2px;filter:saturate(.85)}

.etape{border-top:1px solid var(--line);padding-top:1.4rem;margin-bottom:2rem}
.etape:last-child{margin-bottom:0}
.etape-head{display:flex;align-items:baseline;gap:1.1rem;margin-bottom:.6rem}
.etape-num{font-family:var(--font-mono);font-size:.8rem;letter-spacing:.14em;color:var(--color-accent-deep)}
.etape h3{font-family:var(--font-display);font-weight:520;font-size:var(--fs-h3)}
.etape p{color:var(--color-fg-muted);max-width:30rem}
.etape ul{margin:.9rem 0 0 1.2rem;max-width:30rem}
.etape li{color:var(--color-fg-muted);margin-bottom:.4rem}
.on-dark .etape li{color:var(--color-muted-on-dark)}
.etape-tags{display:flex;flex-wrap:wrap;gap:.5rem;margin-top:1rem}
.etape-tags span{
  font-family:var(--font-mono);font-size:.6rem;letter-spacing:.16em;text-transform:uppercase;
  border:1px solid var(--line);padding:.35rem .6rem;border-radius:2px;color:var(--color-fg-muted);
  transition:border-color var(--dur) var(--ease),color var(--dur) var(--ease);
}
.etape:hover .etape-tags span{border-color:var(--color-accent);color:var(--color-ink)}
.on-dark .etape{border-color:var(--line-on-dark)}
.on-dark .etape-num{color:var(--color-accent-hover)}
.on-dark .etape p{color:var(--color-muted-on-dark)}
.on-dark .etape-tags span{border-color:var(--line-on-dark);color:var(--color-muted-on-dark)}
.on-dark .etape:hover .etape-tags span{border-color:var(--color-accent);color:var(--color-fg-on-dark)}

/* Tags génériques (hors étapes) */
.tags{display:flex;flex-wrap:wrap;gap:.5rem}
.tags span{
  font-family:var(--font-mono);font-size:.6rem;letter-spacing:.16em;text-transform:uppercase;
  border:1px solid var(--line);padding:.35rem .6rem;border-radius:2px;color:var(--color-fg-muted);
}
.on-dark .tags span{border-color:var(--line-on-dark);color:var(--color-muted-on-dark)}

/* ================= Témoignages ================= */
.temoin-grid{display:grid;gap:2.2rem;margin-top:clamp(2.5rem,6vw,4rem)}
.temoin-grid--single{grid-template-columns:1fr}
.temoin--wide{max-width:44rem}
.temoin{
  position:relative;background:var(--color-card);border:1px solid var(--line);border-radius:2px;
  padding:clamp(1.8rem,4vw,2.8rem);padding-top:clamp(3rem,6vw,4rem);
  box-shadow:var(--shadow-card);
}
.temoin::before{
  content:"«";position:absolute;top:.4rem;left:1.4rem;
  font-family:var(--font-display);font-size:5.5rem;line-height:1;color:var(--color-accent);opacity:.3;
}
.temoin blockquote{
  font-family:var(--font-display);font-weight:440;font-size:clamp(1.15rem,2vw,1.4rem);
  line-height:1.45;letter-spacing:-.005em;
}
.temoin figcaption{
  margin-top:1.6rem;padding-top:1.1rem;border-top:1px solid var(--line);
  display:flex;flex-direction:column;gap:.1rem;
}
.temoin-nom{font-weight:600;font-size:.95rem}
.temoin-role{font-family:var(--font-mono);font-size:var(--fs-label);letter-spacing:.1em;text-transform:uppercase;color:var(--color-fg-muted)}

/* ================= Callout (renvoi inter-pages) ================= */
.callout{
  position:relative;border:1px solid var(--color-accent);background:var(--color-surface);
  padding:clamp(1.6rem,4vw,2.4rem);border-radius:2px;display:grid;gap:1rem;overflow:hidden;
}
.callout::before{content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--color-accent)}
.callout h3{font-family:var(--font-display);font-weight:520;font-size:1.25rem}
.callout p{color:var(--color-fg-muted);max-width:34rem}
.on-dark .callout{background:var(--color-dark-2);border-color:var(--color-accent-hover)}
.on-dark .callout p{color:var(--color-muted-on-dark)}

/* ================= Blocs de contenu légal ================= */
.legal-block{border-top:1px solid var(--line);padding:2rem 0}
.legal-block:last-child{padding-bottom:0}

/* ================= Prose (texte long : articles, fiches, légal) ================= */
.prose{max-width:42rem}
.prose p{color:var(--color-fg-muted);margin-bottom:1.3rem}
.prose p:last-child{margin-bottom:0}
.prose h2{font-size:var(--fs-h3);margin-top:2.6rem;margin-bottom:.9rem}
.prose h3{font-family:var(--font-display);font-weight:520;font-size:1.15rem;margin-top:2rem;margin-bottom:.6rem;color:var(--color-ink)}
.prose strong{color:var(--color-ink);font-weight:600}
.prose ul,.prose ol{margin:0 0 1.3rem 1.3rem;color:var(--color-fg-muted)}
.prose li{margin-bottom:.5rem}
.prose blockquote{
  border-left:2px solid var(--color-accent);padding-left:1.3rem;
  font-family:var(--font-display);font-style:italic;font-size:1.15rem;color:var(--color-ink);margin:2rem 0;
}
.prose a{color:var(--color-accent-deep);text-decoration-color:var(--line-strong);text-underline-offset:3px}
.prose a:hover{text-decoration-color:var(--color-accent)}

/* ================= Fiche technique / coordonnées (k / v) ================= */
.coord{list-style:none;margin-top:2.2rem;display:grid;gap:0}
.coord li{
  display:flex;flex-wrap:wrap;gap:.35rem 1.2rem;justify-content:space-between;align-items:baseline;
  border-top:1px solid var(--line);padding:1rem 0;
}
.coord li:last-child{border-bottom:1px solid var(--line)}
.coord .k{font-family:var(--font-mono);font-size:var(--fs-label);letter-spacing:.14em;text-transform:uppercase;color:var(--color-fg-muted)}
.coord .v{font-weight:500;text-align:right}
.coord a{text-decoration:none;position:relative}
.coord a::after{content:"";position:absolute;left:0;bottom:-2px;height:1px;width:0;background:var(--color-accent);transition:width var(--dur) var(--ease)}
.coord a:hover::after{width:100%}

/* ================= Galerie (pages projet) ================= */
.gallery{display:grid;gap:1.5rem;margin-top:clamp(2rem,5vw,3rem)}
.gallery img{width:100%;height:clamp(14rem,32vw,22rem);object-fit:cover;border-radius:2px}
.gallery figcaption{
  margin-top:.8rem;font-family:var(--font-mono);font-size:var(--fs-label);letter-spacing:.1em;
  text-transform:uppercase;color:var(--color-fg-muted);
}
@media (min-width:768px){.gallery{grid-template-columns:1fr 1fr}}

/* ================= Navigation projet précédent / suivant ================= */
.proj-nav{display:grid;gap:1px;background:var(--line);border:1px solid var(--line);margin-top:var(--section-pad)}
.proj-nav a{
  display:flex;flex-direction:column;gap:.5rem;padding:2rem clamp(1.25rem,4vw,2.5rem);
  background:var(--color-bg);text-decoration:none;transition:background var(--dur) var(--ease);
}
.proj-nav a:hover{background:var(--color-surface)}
.proj-nav .dir{font-family:var(--font-mono);font-size:var(--fs-label);letter-spacing:.14em;text-transform:uppercase;color:var(--color-fg-muted)}
.proj-nav .ttl{font-family:var(--font-display);font-size:1.35rem}
.proj-nav .next{text-align:right;align-items:flex-end}
@media (min-width:768px){.proj-nav{grid-template-columns:1fr 1fr}}

/* ================= Échelle énergétique (urbanisme durable) ================= */
.scale{display:grid;gap:0;margin-top:2.2rem}
.scale-row{display:grid;grid-template-columns:3.4rem 1fr auto;align-items:center;gap:1.2rem;padding:.85rem 0;border-top:1px solid var(--line)}
.scale-row:last-child{border-bottom:1px solid var(--line)}
.scale-class{font-family:var(--font-display);font-weight:560;font-size:1.15rem}
.scale-class.is-target{color:var(--color-accent-deep)}
.scale-bar{height:6px;background:var(--line);position:relative;border-radius:2px;overflow:hidden}
.scale-bar span{position:absolute;inset:0 auto 0 0;width:var(--w,100%);background:var(--color-accent);border-radius:2px}
.scale-val{font-family:var(--font-mono);font-size:var(--fs-small);color:var(--color-fg-muted);white-space:nowrap}

/* ================= Repère de localisation (contact) ================= */
.locator{
  position:relative;aspect-ratio:16/10;border:1px solid var(--line);border-radius:2px;overflow:hidden;margin-top:1.6rem;
  background:
    linear-gradient(var(--line-faint) 1px,transparent 1px) 0 0/40px 40px,
    linear-gradient(90deg,var(--line-faint) 1px,transparent 1px) 0 0/40px 40px,
    var(--color-card);
}
.locator-pin{
  position:absolute;top:44%;left:52%;width:16px;height:16px;
  border:2px solid var(--color-accent);border-radius:50% 50% 50% 0;transform:rotate(-45deg) translate(-50%,-50%);
}
.locator-pin::after{content:"";position:absolute;inset:3px;background:var(--color-accent);border-radius:50%}
.locator-label{
  position:absolute;left:1.1rem;bottom:1.1rem;font-family:var(--font-mono);font-size:var(--fs-label);
  letter-spacing:.1em;text-transform:uppercase;color:var(--color-fg-muted);background:var(--color-card);
  padding:.4rem .7rem;border:1px solid var(--line);
}
.locator-axis{position:absolute;font-family:var(--font-mono);font-size:.62rem;letter-spacing:.12em;text-transform:uppercase;color:var(--color-fg-muted)}
.locator-axis--n{top:.9rem;left:50%;transform:translateX(-50%)}
.locator-axis--e{right:.9rem;top:50%;transform:translateY(-50%) rotate(90deg)}

/* ================= Bandeau de clôture (CTA de fin de page) ================= */
.cta-band{background:var(--color-surface);border-block:1px solid var(--line)}
.cta-band-grid{display:grid;gap:2rem;align-items:center}
.cta-band-actions{display:flex;align-items:center;gap:1.4rem;flex-wrap:wrap}
@media (min-width:768px){.cta-band-grid{grid-template-columns:1fr auto}}

/* ================= 404 ================= */
.error-num{
  font-family:var(--font-display);font-weight:480;font-size:clamp(6rem,20vw,12.5rem);
  line-height:.85;letter-spacing:-.02em;color:var(--color-ink);
}
.error-num em{font-style:italic;color:var(--color-accent-deep)}
.error-links{display:flex;flex-wrap:wrap;gap:.9rem 1.6rem;margin-top:2.4rem}

/* ================= Bandeau défilant (accueil) ================= */
.marquee{
  background:var(--color-dark);color:var(--color-muted-on-dark);
  border-block:1px solid var(--line-on-dark);
  overflow:hidden;padding:.95rem 0;
}
.marquee-track{display:flex;gap:0;width:max-content;animation:marquee 38s linear infinite}
.marquee-seq{display:flex;align-items:center;white-space:nowrap}
.marquee-seq span{
  font-family:var(--font-mono);font-size:.76rem;letter-spacing:.22em;text-transform:uppercase;
  padding:0 1.6rem;position:relative;
}
.marquee-seq span::after{
  content:"";position:absolute;right:-1px;top:50%;transform:translateY(-50%);
  width:5px;height:5px;border:1px solid var(--color-accent);rotate:45deg;
}
@keyframes marquee{to{transform:translateX(-50%)}}

/* ================= Carte d'appel à l'action (renvoi /contact) ================= */
.cta-card{
  background:var(--color-card);border:1px solid var(--line);border-radius:2px;
  padding:clamp(1.8rem,4vw,2.8rem);box-shadow:var(--shadow-card);
  display:flex;flex-direction:column;justify-content:center;gap:1.3rem;
}
.cta-card h3{font-family:var(--font-display);font-weight:520;font-size:1.5rem;line-height:1.28}
.cta-card p{color:var(--color-fg-muted)}
.cta-card .btn{align-self:flex-start}
.methode-cta{margin-top:clamp(2.5rem,5vw,4rem);display:flex;justify-content:center}

/* ================= Contact ================= */
.contact{background:var(--color-surface);border-top:1px solid var(--line)}
.contact-grid{display:grid;gap:3.5rem}
.contact-info p{color:var(--color-fg-muted);max-width:26rem;margin-top:1.2rem}
.contact-note{
  margin-top:1.8rem;display:flex;gap:.8rem;align-items:baseline;
  font-size:var(--fs-small);color:var(--color-fg-muted);
}
.contact-note::before{content:"◆";color:var(--color-accent);font-size:.55rem;transform:translateY(-2px)}

.form{background:var(--color-card);border:1px solid var(--line);border-radius:2px;padding:clamp(1.6rem,4vw,2.6rem);box-shadow:var(--shadow-card)}
.form-row{display:grid;gap:1.4rem;margin-bottom:1.4rem}
.field{display:flex;flex-direction:column;gap:.45rem}
.field label{
  font-family:var(--font-mono);font-size:var(--fs-label);letter-spacing:.14em;text-transform:uppercase;color:var(--color-fg-muted);
}
.field label b{color:var(--color-accent-deep);font-weight:500}
.field input,.field textarea,.field select{
  font:inherit;color:var(--color-ink);background:transparent;
  border:none;border-bottom:1px solid var(--line-strong);border-radius:0;
  padding:.6rem .1rem;min-height:44px;transition:border-color var(--dur) var(--ease);
  appearance:none;-webkit-appearance:none;
}
.field textarea{resize:vertical;min-height:7rem;line-height:1.55}
.field input:focus,.field textarea:focus,.field select:focus{outline:none;border-bottom-color:var(--color-accent)}
.field-select{position:relative}
.field-select::after{
  content:"";position:absolute;right:.4rem;bottom:1.25rem;width:.55rem;height:.55rem;
  border-right:1.5px solid var(--color-accent-deep);border-bottom:1.5px solid var(--color-accent-deep);
  transform:rotate(45deg);pointer-events:none;
}
.form-actions{display:flex;flex-wrap:wrap;align-items:center;gap:1.4rem;margin-top:2rem}
.form-hint{font-size:var(--fs-small);color:var(--color-fg-muted)}
.form-success{
  display:none;border:1px solid var(--color-accent);background:var(--color-bg);
  padding:1.1rem 1.3rem;border-radius:2px;margin-top:1.4rem;font-size:.95rem;
}
.form-success.show{display:block}

/* ================= Footer ================= */
.footer{background:var(--color-dark);color:var(--color-muted-on-dark);padding-top:var(--section-pad)}
.footer .cote{margin-bottom:clamp(2.5rem,6vw,4rem)}
.footer-grid{display:grid;gap:2.5rem;padding-bottom:clamp(2.5rem,6vw,4rem)}
.footer-brand .brand-name{color:var(--color-fg-on-dark)}
.footer-brand p{font-size:var(--fs-small);max-width:19rem;margin-top:1rem;line-height:1.7}
.footer h4{
  font-family:var(--font-mono);font-size:var(--fs-label);font-weight:500;letter-spacing:.18em;
  text-transform:uppercase;color:var(--color-fg-on-dark);margin-bottom:1.2rem;
}
.footer ul{list-style:none;display:grid;gap:.55rem;font-size:.92rem}
.footer a{color:inherit;text-decoration:none;transition:color var(--dur) var(--ease)}
.footer a:hover{color:var(--color-accent-hover)}
.footer-bottom{
  border-top:1px solid var(--line-on-dark);padding:1.4rem 0 1.6rem;
  display:flex;flex-wrap:wrap;gap:.8rem 2rem;align-items:center;justify-content:space-between;
  font-family:var(--font-mono);font-size:.68rem;letter-spacing:.1em;text-transform:uppercase;
}
.footer-bottom nav{display:flex;gap:1.6rem;flex-wrap:wrap}

/* ================= Breakpoints ================= */
@media (min-width:768px){
  .hero-stats{grid-template-columns:repeat(3,1fr)}
  .stat{border-bottom:none;border-right:1px solid var(--line);padding:1.7rem 1.8rem}
  .stat:first-child{padding-left:0}
  .stat:last-child{border-right:none}
  .form-row.cols-2{grid-template-columns:1fr 1fr}
  .temoin-grid{grid-template-columns:1fr 1fr}
  .temoin:nth-child(2){margin-top:3.2rem}
  .projets-grid{grid-template-columns:repeat(12,1fr)}
  .projets-grid>*:nth-child(4n+1){grid-column:1/8}
  .projets-grid>*:nth-child(4n+2){grid-column:8/13;margin-top:4.5rem}
  .projets-grid>*:nth-child(4n+3){grid-column:1/6;margin-top:-3rem}
  .projets-grid>*:nth-child(4n+4){grid-column:6/13}
  .methode-bloc{grid-template-columns:1fr 1fr;gap:clamp(2.5rem,5vw,4.5rem)}
  .methode-bloc.flip .methode-fig{order:2}
  .cabinet-grid{grid-template-columns:5fr 7fr;gap:clamp(2.5rem,5vw,4.5rem)}
}
@media (min-width:1024px){
  .nav-links{display:flex}
  a.nav-cta{display:inline-flex;min-height:42px;padding:.6rem 1.3rem;font-size:.88rem}
  .burger{display:none}
  .hero-grid{grid-template-columns:7fr 5fr;gap:clamp(3rem,5vw,5rem);align-items:start}
  .hero-visual{margin-top:2.2rem}
  .hero-img{margin-right:calc(-1 * clamp(0rem,4vw,3rem))}
  .apports-grid{grid-template-columns:5fr 7fr;gap:clamp(3rem,6vw,5.5rem)}
  .apports-side{position:sticky;top:7.5rem}
  .contact-grid{grid-template-columns:5fr 7fr;gap:clamp(3rem,6vw,5.5rem)}
  .footer-grid{grid-template-columns:2fr 1fr 1fr 1fr;gap:3rem}
}

/* ================= Mouvement réduit ================= */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation:none!important;transition:none!important}
  .rv{opacity:1;transform:none}
  .mobile-menu nav a{opacity:1;transform:none}
}