/* ============================================================
   Agence Virginie Berthet (AVB) — D.A.3 « Bureaux & Volumes »
   Contemporain · graphique · B2B / tertiaire.
   Feuille de style partagée du site multi-pages premium.
   Maquette d'étude — ASALIS Consulting Group.
   ============================================================ */
:root{
  --gris:#EDEDED; --gris-2:#E1E1E1; --gris-3:#D4D4D4;
  --orange:#B85C38; --orange-clair:#D07A56; --orange-fonce:#9C4A2B;
  --noir:#1A1A1A; --noir-2:#2A2A2A; --encre:#1A1A1A;
  --texte:#3A3A3A; --texte-clair:#6A6A6A;
  --blanc:#FFFFFF;
  --trait:rgba(26,26,26,.14); --trait-fort:rgba(26,26,26,.28);
  --trait-clair:rgba(237,237,237,.16);
  --s2:16px; --s3:28px; --s4:56px; --s5:132px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
/* Transitions inter-pages (progressive enhancement — Chrome/Edge récents) */
@view-transition{navigation:auto}
@media (prefers-reduced-motion:no-preference){
  ::view-transition-old(root){animation:vt-out .32s ease both}
  ::view-transition-new(root){animation:vt-in .42s ease both}
}
@keyframes vt-out{to{opacity:0}}
@keyframes vt-in{from{opacity:0}}
body{font-family:'IBM Plex Sans',sans-serif;font-size:16.5px;line-height:1.7;color:var(--texte);background:var(--gris);-webkit-font-smoothing:antialiased}
h1,h2,h3,.grotesk{font-family:'Space Grotesk',sans-serif;font-weight:500}
h1,h2,h3{line-height:1.02;letter-spacing:-.02em;color:var(--noir)}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%}
.wrap{width:min(1200px,90%);margin:0 auto}
.eyebrow{font-family:'Space Grotesk',sans-serif;font-size:11.5px;letter-spacing:.34em;text-transform:uppercase;font-weight:600;color:var(--orange)}

/* Header / nav multi-pages */
header{position:sticky;top:0;z-index:50;background:transparent;border-bottom:1px solid transparent;transition:background .45s ease,border-color .45s ease}
header::before{content:"";position:absolute;left:0;right:0;top:0;height:130px;background:linear-gradient(180deg,rgba(20,20,20,.55),rgba(20,20,20,0));z-index:-1;transition:opacity .45s;pointer-events:none}
header.solid{background:rgba(237,237,237,.94);backdrop-filter:blur(10px);border-bottom-color:var(--trait)}
header.solid::before{opacity:0}
.nav{display:flex;align-items:center;justify-content:space-between;padding:20px 0;gap:16px}
.logo{font-family:'Space Grotesk',sans-serif;font-weight:600;font-size:21px;letter-spacing:.02em;color:#fff;white-space:nowrap;transition:color .45s ease;display:flex;align-items:center;gap:11px}
.logo .mono{display:inline-flex;align-items:center;justify-content:center;width:34px;height:34px;background:var(--orange);color:#fff;font-size:13px;font-weight:700;letter-spacing:.02em;border-radius:2px;transition:background .45s ease,color .45s ease}
.logo em{font-style:normal;font-weight:400;color:rgba(255,255,255,.82);transition:color .45s ease}
.nav ul{display:none;list-style:none;gap:var(--s3);font-size:13px;font-weight:500;letter-spacing:.02em}
.nav ul a{color:rgba(255,255,255,.82);transition:color .3s;padding-bottom:4px;border-bottom:2px solid transparent}
.nav ul a:hover{color:#fff}
.nav ul a[aria-current="page"]{color:#fff;border-bottom-color:var(--orange-clair)}
.btn{display:inline-block;font-family:'Space Grotesk',sans-serif;font-weight:600;font-size:13px;letter-spacing:.03em;background:var(--orange);color:#fff;padding:13px 26px;border-radius:2px;transition:background .3s ease-out,color .3s,border-color .3s;cursor:pointer;border:none}
.btn:hover{background:var(--orange-fonce)}
.btn.ghost{background:transparent;border:1px solid var(--noir);color:var(--noir)}
.btn.ghost:hover{border-color:var(--orange);color:var(--orange)}
/* Nav : bouton clair sur le héro, plein une fois "solid" */
header .btn{background:rgba(255,255,255,.14);color:#fff;border:1px solid rgba(255,255,255,.5)}
header .btn:hover{background:rgba(255,255,255,.26)}
header.solid .logo{color:var(--noir)}
header.solid .logo em{color:var(--texte-clair)}
header.solid .nav ul a{color:var(--texte-clair)}
header.solid .nav ul a:hover{color:var(--noir)}
header.solid .nav ul a[aria-current="page"]{color:var(--noir);border-bottom-color:var(--orange)}
header.solid .btn{background:var(--orange);color:#fff;border:1px solid var(--orange)}
header.solid .btn:hover{background:var(--orange-fonce)}

/* Image frame (cadre graphique, décalé orange) */
.frame-dbl{position:relative;border:1px solid var(--trait-fort)}
.frame-dbl::before{content:"";position:absolute;inset:auto -12px -12px auto;width:64%;height:64%;background:var(--orange);z-index:-1}
.frame-dbl figure{background:var(--gris-2);overflow:hidden;margin:0}
.frame-dbl img{width:100%;height:100%;object-fit:cover;display:block}

/* Page hero (secondaire, pour pages internes) */
.page-hero{padding:var(--s5) 0 var(--s4);border-bottom:1px solid var(--trait)}
.page-hero h1{font-size:clamp(38px,5.6vw,72px);margin:14px 0 var(--s3)}
.page-hero h1 em{font-style:normal;color:var(--orange)}
.page-hero .lead{font-size:18.5px;color:var(--texte);max-width:40em}

/* Hero cinématographique — fond photo plein écran + Ken Burns + overlay */
.hero-cine{position:relative;min-height:90vh;display:flex;align-items:flex-end;overflow:hidden;background:var(--noir)}
.hero-cine .bg{position:absolute;inset:0;z-index:0}
.hero-cine .bg img{width:100%;height:100%;object-fit:cover;transform-origin:center;animation:kenburns 20s ease-out both}
@keyframes kenburns{from{transform:scale(1.12)}to{transform:scale(1)}}
.hero-cine::after{content:"";position:absolute;inset:0;z-index:1;background:linear-gradient(180deg,rgba(20,20,20,.16) 0%,rgba(20,20,20,.4) 45%,rgba(20,20,20,.9) 100%)}
.hero-cine .wrap{position:relative;z-index:2;padding:var(--s5) 0 var(--s5);width:min(1200px,90%)}
.hero-cine .eyebrow{color:var(--orange-clair)}
.hero-cine h1{color:#fff;font-size:clamp(44px,7.6vw,100px);font-weight:500;max-width:15em;margin-top:16px}
.hero-cine h1 em{font-style:normal;color:var(--orange-clair)}
.hero-cine .stand{font-size:19px;color:#e4e4e4;max-width:36em;margin:var(--s3) 0}
.hero-cine .cta-row{display:flex;flex-wrap:wrap;gap:14px}
.hero-cine .btn.ghost{border-color:rgba(255,255,255,.65);color:#fff}
.hero-cine .btn.ghost:hover{border-color:var(--orange-clair);color:var(--orange-clair)}
.hero-cine .meta{display:flex;flex-wrap:wrap;gap:14px 32px;margin-top:var(--s4);padding-top:var(--s3);border-top:1px solid rgba(255,255,255,.22);font-size:12.5px;font-weight:500;letter-spacing:.02em;color:#cfcfcf}
.hero-cine .meta b{color:#fff;font-family:'Space Grotesk',sans-serif;font-weight:600}
.hero-cine .scroll-hint{position:absolute;left:50%;bottom:22px;z-index:2;transform:translateX(-50%);color:rgba(255,255,255,.7);font-size:11px;letter-spacing:.26em;text-transform:uppercase;animation:bob 2.4s ease-in-out infinite}
@keyframes bob{0%,100%{transform:translate(-50%,0)}50%{transform:translate(-50%,7px)}}
/* Entrée à l'ouverture (au-dessus de la ligne de flottaison) */
.hero-cine .up{opacity:0;transform:translateY(24px);animation:heroUp .9s cubic-bezier(.22,.61,.36,1) forwards}
.hero-cine .up.d1{animation-delay:.15s}.hero-cine .up.d2{animation-delay:.30s}.hero-cine .up.d3{animation-delay:.45s}.hero-cine .up.d4{animation-delay:.60s}
@keyframes heroUp{to{opacity:1;transform:none}}
@media (prefers-reduced-motion:reduce){
  .hero-cine .bg img{animation:none}
  .hero-cine .up{opacity:1;transform:none;animation:none}
  .hero-cine .scroll-hint{animation:none}
}

/* Variante compacte pour les pages internes */
.hero-cine.compact{min-height:58vh}
.hero-cine.compact .wrap{padding:var(--s5) 0 var(--s4)}
.hero-cine.compact h1{font-size:clamp(38px,5.6vw,74px);max-width:16em}
.hero-cine.compact .scroll-hint{display:none}

/* Bande signature — clients / références tertiaires */
.signature{border-top:1px solid var(--trait);border-bottom:1px solid var(--trait);padding:22px 0;background:var(--noir)}
.signature .wrap{display:flex;flex-wrap:wrap;gap:14px 44px;justify-content:center;align-items:center;font-family:'Space Grotesk',sans-serif;font-size:12px;letter-spacing:.18em;text-transform:uppercase;font-weight:600;color:#e4e4e4}
.signature .wrap span{position:relative;padding-left:22px}
.signature .wrap span::before{content:"";position:absolute;left:0;top:50%;width:9px;height:9px;background:var(--orange);transform:translateY(-50%)}

/* Book / projets (liste alternée) */
.book{padding:var(--s5) 0}
.book .head{display:flex;flex-wrap:wrap;align-items:baseline;justify-content:space-between;gap:12px;margin-bottom:var(--s4)}
.book h2{font-size:clamp(32px,5vw,58px)}
.book .head p{font-size:15px;color:var(--texte-clair);max-width:26em}
.book .head a{color:var(--orange);border-bottom:1px solid var(--orange)}
.proj{display:grid;gap:var(--s4);align-items:center;padding:var(--s4) 0;border-top:1px solid var(--trait)}
.proj:nth-child(even) .frame-dbl{order:-1}
.proj .projimg{aspect-ratio:64/46}
.proj .num{font-family:'Space Grotesk',sans-serif;font-weight:600;font-size:13px;letter-spacing:.14em;text-transform:uppercase;color:var(--orange)}
.proj h3{font-size:clamp(26px,3.4vw,40px);margin:12px 0 16px;font-weight:500}
.proj p{font-size:16px;color:var(--texte);max-width:34em}
.proj .facts{display:flex;flex-wrap:wrap;gap:10px;margin-top:var(--s3)}
.proj .facts span{font-size:12px;font-weight:500;color:var(--noir);border:1px solid var(--trait-fort);padding:7px 16px;border-radius:2px}

/* Galerie grille (aperçus) */
.grid-proj{display:grid;grid-template-columns:1fr;gap:var(--s3);padding:var(--s4) 0}
.card{position:relative;overflow:hidden;background:var(--blanc);border:1px solid var(--trait)}
.card figure{margin:0;overflow:hidden;aspect-ratio:4/3;background:var(--gris-2)}
.card img{width:100%;height:100%;object-fit:cover;transition:transform .9s cubic-bezier(.22,.61,.36,1)}
.card:hover img{transform:scale(1.05)}
.card .cap{padding:20px 22px}
.card .cap .num{font-family:'Space Grotesk',sans-serif;font-weight:600;font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:var(--orange)}
.card .cap h3{font-size:22px;margin-top:5px;font-weight:500}
.card .cap p{font-size:13.5px;color:var(--texte-clair);margin-top:6px}

/* Bloc éditorial / texte long (bio) */
.prose{padding:var(--s4) 0 var(--s5)}
.prose .col{max-width:62ch}
.prose p{margin-bottom:var(--s3);font-size:17px;color:var(--texte)}
.prose p .lead-in{font-family:'Space Grotesk',sans-serif;font-weight:500;font-size:1.05em;color:var(--noir)}
.timeline{display:grid;gap:2px;margin-top:var(--s4)}
.tcell{background:var(--blanc);padding:26px 26px;border-left:3px solid var(--orange)}
.tcell b{display:block;font-family:'Space Grotesk',sans-serif;font-size:19px;color:var(--noir);margin-bottom:6px;font-weight:600}
.tcell p{font-size:14.5px;color:var(--texte-clair);margin:0}

/* Références majeures (grands projets tertiaires) */
.refs{padding:var(--s4) 0}
.refs-grid{display:grid;grid-template-columns:1fr;gap:2px}
.refcell{background:var(--blanc);padding:30px 28px;border-top:3px solid var(--orange);display:flex;flex-direction:column;gap:6px;min-height:150px;justify-content:center}
.refcell .r-name{font-family:'Space Grotesk',sans-serif;font-size:22px;color:var(--noir);font-weight:600}
.refcell .r-det{font-size:13.5px;color:var(--texte-clair)}
.refcell .r-flag{font-size:11px;letter-spacing:.16em;text-transform:uppercase;font-weight:600;color:var(--orange)}

/* Process / méthode (fond noir) */
.parcours{background:var(--noir);color:#e4e4e4;padding:var(--s5) 0}
.parcours .eyebrow{color:var(--orange-clair)}
.parcours h2{color:#fff;font-size:clamp(28px,4.4vw,50px);margin:12px 0 var(--s4);max-width:16em;font-weight:500}
.parcours .grid2{display:grid;gap:2px}
.pcell{background:rgba(255,255,255,.05);padding:32px 28px;border-top:3px solid var(--orange);position:relative}
.pcell .step{font-family:'Space Grotesk',sans-serif;font-size:12px;letter-spacing:.16em;color:var(--orange-clair);font-weight:600;margin-bottom:10px}
.pcell b{display:block;font-family:'Space Grotesk',sans-serif;font-size:20px;color:#fff;margin-bottom:8px;font-weight:600}
.pcell p{font-size:14.5px;color:#c9c9c9}
.parcours .quote{margin-top:var(--s4);border-top:1px solid var(--trait-clair);padding-top:var(--s4)}
.parcours blockquote{font-family:'Space Grotesk',sans-serif;font-size:clamp(22px,3vw,32px);color:#fff;max-width:24em;line-height:1.24;font-weight:400}
.parcours cite{display:block;margin-top:14px;font-family:'IBM Plex Sans',sans-serif;font-style:normal;font-size:12.5px;font-weight:600;letter-spacing:.1em;color:var(--orange-clair)}
.parcours .quote a{color:var(--orange-clair);border-bottom:1px solid var(--orange-clair)}

/* Bloc chiffres / positionnement */
.stats{padding:var(--s5) 0;border-top:1px solid var(--trait)}
.stats .grid3{display:grid;grid-template-columns:1fr;gap:2px;margin-top:var(--s4)}
.stat{background:var(--blanc);padding:34px 28px;border-top:3px solid var(--orange)}
.stat .big{font-family:'Space Grotesk',sans-serif;font-size:clamp(38px,5vw,54px);font-weight:600;color:var(--noir);line-height:1;letter-spacing:-.02em}
.stat .lbl{font-size:14px;color:var(--texte-clair);margin-top:12px}

/* Contact */
.contact-grid{display:grid;gap:var(--s4);padding:var(--s4) 0 var(--s5)}
.cinfo b{display:block;font-family:'Space Grotesk',sans-serif;font-size:20px;color:var(--noir);margin-bottom:6px;font-weight:600}
.cinfo p{font-size:16px;color:var(--texte);margin-bottom:var(--s3)}
.cinfo a{color:var(--noir);border-bottom:1px solid var(--orange)}
.serv{display:flex;flex-wrap:wrap;gap:9px;margin-top:8px}
.serv span{font-size:12.5px;color:var(--noir);border:1px solid var(--trait-fort);padding:7px 15px;border-radius:2px}
form label{display:block;font-family:'Space Grotesk',sans-serif;font-size:12px;font-weight:600;letter-spacing:.08em;color:var(--noir);margin:16px 0 6px;text-transform:uppercase}
form input,form textarea{width:100%;font-family:inherit;font-size:15px;color:var(--encre);background:var(--blanc);border:1px solid var(--trait-fort);padding:13px 15px;border-radius:2px}
form input:focus,form textarea:focus{outline:none;border-color:var(--orange)}
form .btn{margin-top:22px}

/* Footer */
footer{background:var(--noir);color:#bdbdbd;padding:var(--s5) 0 var(--s4);font-size:15px}
.foot{display:grid;gap:var(--s3)}
.foot b{display:block;color:#fff;font-family:'Space Grotesk',sans-serif;font-size:18px;margin-bottom:8px;font-weight:600}
.foot a:hover{color:var(--orange-clair)}
.foot ul{list-style:none;display:grid;gap:6px;font-size:14px}
.legal{border-top:1px solid rgba(255,255,255,.12);margin-top:var(--s4);padding-top:var(--s3);font-size:12px;color:#8a8a8a;display:flex;flex-wrap:wrap;gap:14px;justify-content:space-between}

/* Badge maquette */
.badge-asalis{position:fixed;left:14px;bottom:14px;z-index:60;font-family:'Space Grotesk',sans-serif;font-size:11px;font-weight:500;background:rgba(26,26,26,.92);color:#ededed;padding:7px 14px;border-radius:2px;border:1px solid var(--orange)}

/* Lightbox galerie */
.lightbox{position:fixed;inset:0;z-index:100;background:rgba(15,15,15,.95);display:flex;align-items:center;justify-content:center;padding:6vh 5vw;cursor:zoom-out;opacity:0;visibility:hidden;transition:opacity .3s ease}
.lightbox.open{opacity:1;visibility:visible}
.lightbox img{max-width:100%;max-height:88vh;object-fit:contain;box-shadow:0 24px 70px rgba(0,0,0,.6);transform:scale(.97);transition:transform .3s ease}
.lightbox.open img{transform:scale(1)}
.lightbox .lb-cap{position:absolute;bottom:26px;left:0;right:0;text-align:center;color:#ededed;font-size:13px;letter-spacing:.04em;padding:0 20px}
.lightbox .lb-close{position:absolute;top:20px;right:28px;color:#ededed;font-size:34px;line-height:1;cursor:pointer;opacity:.8}
.lightbox .lb-close:hover{opacity:1;color:var(--orange-clair)}
.card img{cursor:zoom-in}

/* Reveal */
.js .rv{opacity:0;transform:translateY(26px);transition:opacity .8s ease,transform .8s cubic-bezier(.22,.61,.36,1)}
.js .rv.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){.js .rv{opacity:1;transform:none;transition:none}}

@media (min-width:760px){
  .grid-proj{grid-template-columns:repeat(2,1fr);gap:var(--s3)}
}
@media (min-width:860px){
  .nav ul{display:flex}
  .proj{grid-template-columns:1fr 1fr;gap:var(--s5)}
  .parcours .grid2{grid-template-columns:repeat(3,1fr)}
  .refs-grid{grid-template-columns:repeat(3,1fr)}
  .timeline{grid-template-columns:repeat(2,1fr)}
  .stats .grid3{grid-template-columns:repeat(3,1fr)}
  .contact-grid{grid-template-columns:1fr 1fr;gap:var(--s5)}
  .foot{grid-template-columns:1.4fr 1fr 1fr 1fr}
}