/* ===========================================================
   TRANSVERSE DÉVELOPPEMENT
   École : style typographique international (suisse) — grille, filets
   =========================================================== */
:root{
  --black:#111111;
  --red:#E2231A;
  --grey:#6b6b6b;
  --line:#111111;
  --line-soft:#dcdcdc;
  --bg:#ffffff;
  --bg-2:#f3f3f3;
  --maxw:1240px;
  --sans:"Inter",Helvetica,Arial,sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--sans);background:var(--bg);color:var(--black);line-height:1.5;font-size:16px;-webkit-font-smoothing:antialiased;letter-spacing:-.01em}
img{max-width:100%;display:block}a{color:inherit;text-decoration:none}
h1,h2,h3,h4{font-weight:700;line-height:1.02;letter-spacing:-.035em}
h1{font-size:clamp(2.6rem,7vw,6rem);text-transform:lowercase}
h2{font-size:clamp(1.8rem,3.6vw,2.9rem);text-transform:lowercase}
h3{font-size:1.15rem;letter-spacing:-.02em}
p{margin-bottom:1rem}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 32px}
.muted{color:var(--grey)}
.red{color:var(--red)}
section{padding:0}
.rule{border:0;border-top:1px solid var(--line)}
.lead{font-size:1.3rem;line-height:1.35;letter-spacing:-.02em}

/* index labels */
.lbl{font-size:.72rem;text-transform:uppercase;letter-spacing:.14em;font-weight:600;color:var(--grey)}
.num{font-size:.78rem;font-weight:700;color:var(--red);letter-spacing:.04em}

.btn{display:inline-flex;align-items:center;gap:10px;font-weight:600;font-size:.9rem;padding:13px 22px;border:1px solid var(--black);background:var(--black);color:#fff;cursor:pointer;transition:.15s;letter-spacing:.01em}
.btn:hover{background:var(--red);border-color:var(--red)}
.btn-out{background:transparent;color:var(--black)}.btn-out:hover{background:var(--black);color:#fff}
.btn .ar{transition:.15s}.btn:hover .ar{transform:translateX(3px)}

/* header */
.hdr{position:sticky;top:0;z-index:50;background:var(--bg);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:70px}
.brand{display:flex;align-items:center;gap:12px;font-weight:700;font-size:1.05rem;letter-spacing:-.03em}
.brand img{width:30px;height:30px}
.brand b{font-weight:700}.brand span{color:var(--grey);font-weight:400}
.nav-links{display:flex;gap:0;list-style:none;align-items:stretch}
.nav-links a{display:flex;align-items:center;padding:0 16px;font-size:.86rem;font-weight:500;border-left:1px solid var(--line-soft)}
.nav-links a:hover,.nav-links a.active{color:var(--red)}
.nav-links a.cta{background:var(--black);color:#fff;font-weight:600}.nav-links a.cta:hover{background:var(--red)}
.burger{display:none;width:42px;height:38px;border:1px solid var(--line);background:transparent;cursor:pointer}
.burger span{display:block;width:18px;height:1.5px;background:var(--black);margin:4px auto}

/* HERO — grid */
.hero{border-bottom:1px solid var(--line);padding:60px 0 50px}
.hero .grid{display:grid;grid-template-columns:repeat(12,1fr);gap:24px;align-items:end}
.hero .h-main{grid-column:1/9}
.hero .h-meta{grid-column:9/13;border-left:1px solid var(--line);padding-left:24px;align-self:stretch;display:flex;flex-direction:column;justify-content:flex-end}
.hero h1{margin:18px 0}
.hero .h-meta p{font-size:.92rem}
.hero .h-meta .lbl{margin-bottom:10px}
.hero-cta{display:flex;gap:12px;flex-wrap:wrap;margin-top:14px}
.hero .strip{display:grid;grid-template-columns:repeat(12,1fr);gap:24px;margin-top:40px;padding-top:18px;border-top:1px solid var(--line)}
.hero .strip .c{grid-column:span 3}
.hero .strip .c .lbl{margin-bottom:6px}
.hero .strip .c p{font-size:.95rem;margin:0}

/* numbered section rows */
.row-sec{display:grid;grid-template-columns:repeat(12,1fr);gap:24px;padding:60px 0;border-bottom:1px solid var(--line)}
.row-sec .head{grid-column:1/4}
.row-sec .head .num{display:block;margin-bottom:10px}
.row-sec .body{grid-column:5/13}
.row-sec .body.narrow{grid-column:5/11}
.row-sec h2{margin-bottom:18px}

/* stat row */
.statrow{display:grid;grid-template-columns:repeat(4,1fr);gap:0;border-bottom:1px solid var(--line)}
.statrow .s{padding:44px 24px;border-right:1px solid var(--line-soft)}
.statrow .s:last-child{border-right:0}
.statrow .n{font-size:3.4rem;font-weight:700;letter-spacing:-.04em;line-height:1}
.statrow .n .red{color:var(--red)}
.statrow .l{font-size:.86rem;color:var(--grey);margin-top:8px;text-transform:lowercase}

/* services list */
.svc-list{border-top:1px solid var(--line)}
.svc-list .it{display:grid;grid-template-columns:60px 1fr 1fr;gap:24px;padding:26px 0;border-bottom:1px solid var(--line-soft);align-items:start}
.svc-list .it:hover{background:var(--bg-2)}
.svc-list .it .num{font-size:1rem}
.svc-list .it h3{font-size:1.5rem;letter-spacing:-.03em;text-transform:lowercase}
.svc-list .it p{margin:0;color:var(--grey);font-size:.96rem}

/* media grid */
.mgrid{display:grid;grid-template-columns:repeat(12,1fr);gap:24px}
.mgrid figure{overflow:hidden;border:1px solid var(--line)}
.mgrid img{width:100%;height:100%;object-fit:cover;filter:grayscale(1) contrast(1.05);transition:.4s}
.mgrid figure:hover img{filter:grayscale(0)}
.mgrid .big{grid-column:1/8}.mgrid .big img{min-height:340px}
.mgrid .sm{grid-column:8/13;display:grid;gap:24px}
.mgrid .sm img{min-height:158px}
.mgrid figcaption{font-size:.74rem;color:var(--grey);padding:7px 10px;border-top:1px solid var(--line);text-transform:uppercase;letter-spacing:.08em}
.mgrid figcaption b{color:var(--red)}

/* principles */
.princ{display:grid;grid-template-columns:repeat(3,1fr);gap:0;border:1px solid var(--line)}
.princ .p{padding:30px 26px;border-right:1px solid var(--line-soft)}
.princ .p:last-child{border-right:0}
.princ .num{display:block;margin-bottom:14px}
.princ h3{margin-bottom:8px;text-transform:lowercase}
.princ p{margin:0;color:var(--grey);font-size:.95rem}

/* quote */
.quote{padding:70px 0;border-bottom:1px solid var(--line)}
.quote blockquote{font-size:clamp(1.6rem,3.6vw,2.8rem);font-weight:700;letter-spacing:-.035em;line-height:1.1;max-width:20ch}
.quote .src{margin-top:20px;font-size:.86rem;color:var(--grey);text-transform:uppercase;letter-spacing:.1em}

/* cta */
.cta{padding:80px 0;background:var(--black);color:#fff}
.cta h2{color:#fff;text-transform:lowercase}
.cta .grid{display:grid;grid-template-columns:repeat(12,1fr);gap:24px;align-items:end}
.cta .l{grid-column:1/8}.cta .r{grid-column:9/13;text-align:right}
.cta .btn{background:#fff;color:var(--black);border-color:#fff}.cta .btn:hover{background:var(--red);color:#fff;border-color:var(--red)}

/* page hero */
.page-hero{padding:54px 0 40px;border-bottom:1px solid var(--line)}
.page-hero .grid{display:grid;grid-template-columns:repeat(12,1fr);gap:24px;align-items:end}
.page-hero .t{grid-column:1/9}
.page-hero .m{grid-column:9/13;border-left:1px solid var(--line);padding-left:24px}
.page-hero h1{margin-top:14px}

/* prose */
.prose{max-width:680px}
.prose h2{margin:26px 0 10px;font-size:1.6rem}
.prose p,.prose li{color:#333}
.prose ul{padding-left:18px;margin:8px 0;display:grid;gap:6px}

/* contact / legal */
.contact-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:24px;padding:60px 0}
.contact-grid .info{grid-column:1/5}
.contact-grid .form{grid-column:6/13}
.kv{border-top:1px solid var(--line)}
.kv .r{display:flex;justify-content:space-between;gap:14px;padding:11px 0;border-bottom:1px solid var(--line-soft);font-size:.9rem}
.kv .r span:first-child{color:var(--grey);text-transform:uppercase;letter-spacing:.08em;font-size:.74rem}
.kv .r span:last-child{font-weight:600}
.field{margin-bottom:16px}.field label{display:block;font-size:.74rem;text-transform:uppercase;letter-spacing:.1em;font-weight:600;margin-bottom:6px}
.field input,.field textarea,.field select{width:100%;padding:12px 14px;border:1px solid var(--black);background:#fff;font:inherit;border-radius:0}
.field input:focus,.field textarea:focus,.field select:focus{outline:2px solid var(--red);outline-offset:-2px}
.field textarea{min-height:130px;resize:vertical}
.consent{display:flex;gap:9px;font-size:.82rem;color:var(--grey)}.consent input{width:auto;margin-top:4px}
.map{border:1px solid var(--black);width:100%;height:280px;margin-top:16px;filter:grayscale(1)}

/* footer */
.ftr{padding:54px 0 26px}
.ftr .grid{display:grid;grid-template-columns:repeat(12,1fr);gap:24px}
.ftr .b{grid-column:1/5}.ftr .c1{grid-column:6/8}.ftr .c2{grid-column:8/10}.ftr .c3{grid-column:10/13}
.ftr .brand{margin-bottom:12px}
.ftr h4{font-size:.72rem;text-transform:uppercase;letter-spacing:.12em;color:var(--grey);margin-bottom:12px}
.ftr ul{list-style:none;display:grid;gap:7px}.ftr a,.ftr li{font-size:.88rem;color:#333}.ftr a:hover{color:var(--red)}
.ftr-bottom{display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px;margin-top:40px;padding-top:16px;border-top:1px solid var(--line);font-size:.8rem;color:var(--grey)}

.reveal{opacity:0;transform:translateY(14px);transition:.5s}.reveal.in{opacity:1;transform:none}

@media(max-width:900px){
  .hero .h-main,.hero .h-meta,.cta .l,.cta .r,.page-hero .t,.page-hero .m{grid-column:1/13}
  .hero .h-meta,.page-hero .m{border-left:0;padding-left:0;border-top:1px solid var(--line);padding-top:18px;margin-top:8px}
  .cta .r{text-align:left}
  .hero .strip .c{grid-column:span 6}
  .row-sec .head,.row-sec .body,.row-sec .body.narrow{grid-column:1/13}
  .statrow{grid-template-columns:1fr 1fr}.statrow .s:nth-child(2){border-right:0}
  .mgrid .big,.mgrid .sm{grid-column:1/13}
  .princ{grid-template-columns:1fr}.princ .p{border-right:0;border-bottom:1px solid var(--line-soft)}
  .svc-list .it{grid-template-columns:40px 1fr}.svc-list .it p{grid-column:2}
  .contact-grid .info,.contact-grid .form{grid-column:1/13}
  .ftr .b,.ftr .c1,.ftr .c2,.ftr .c3{grid-column:span 6}
}
@media(max-width:600px){
  .nav-links{position:fixed;inset:70px 0 auto 0;background:var(--bg);flex-direction:column;align-items:stretch;border-bottom:1px solid var(--line);transform:translateY(-130%);transition:.3s}
  .nav-links.open{transform:none}.nav-links a{border-left:0;border-top:1px solid var(--line-soft);padding:14px 32px}
  .burger{display:block}
  .statrow{grid-template-columns:1fr}.statrow .s{border-right:0}
  h1{font-size:2.6rem}
}
@media(prefers-reduced-motion:reduce){*{transition:none!important}.reveal{opacity:1;transform:none}}