:root{
  --noir:#0C0A0A;--noir-chaud:#110E0E;--noir-section:#0F0C0C;
  --rouge:#C8102E;
  --blanc:#F3EEE6;--gris:#8B7F7C;--gris-c:#B8ADA8;--gris-sourd:#5A504E;
  --font:'Space Grotesk',sans-serif;--accent:'Playfair Display',serif;
  --bord:clamp(24px,5vw,72px);--mesure:1100px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{background:var(--noir);color:var(--blanc);font-family:var(--font);overflow-x:hidden;-webkit-font-smoothing:antialiased;line-height:1.55}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
::selection{background:rgba(200,16,46,.3);color:var(--blanc)}

/* NAV */
header{position:fixed;top:0;left:0;right:0;z-index:50;display:flex;align-items:center;justify-content:space-between;padding:14px var(--bord);background:rgba(12,10,10,.96);backdrop-filter:blur(14px);border-bottom:1px solid rgba(200,16,46,.06)}
header.scrolled{padding:10px var(--bord);border-bottom-color:rgba(200,16,46,.12)}
.logo{height:32px;opacity:.92;transition:opacity .3s}.logo:hover{opacity:1}
nav{display:flex;gap:22px;align-items:center}
nav a{font-size:.68rem;font-weight:600;letter-spacing:.14em;text-transform:uppercase;color:var(--gris);transition:color .3s}
nav a:hover{color:var(--blanc)}
nav .nav-cta{color:var(--blanc);border:1px solid rgba(200,16,46,.35);padding:7px 14px;border-radius:2px;transition:background .3s,border-color .3s}
nav .nav-cta:hover{background:rgba(200,16,46,.1);border-color:var(--rouge)}
.burger{display:none;background:none;border:0;color:var(--blanc);cursor:pointer;font-size:1.3rem}

/* SPLIT */
.split{display:grid;grid-template-columns:42fr 58fr;min-height:500px;align-items:stretch;position:relative}
.split::before{content:"";position:absolute;inset:0;pointer-events:none;background:radial-gradient(ellipse 70% 55% at 0% 100%,rgba(200,16,46,.04),transparent 50%)}
.split.reverse{grid-template-columns:58fr 42fr;direction:rtl}
.split.reverse > *{direction:ltr}
.split.reverse::before{background:radial-gradient(ellipse 70% 55% at 100% 100%,rgba(200,16,46,.04),transparent 50%)}
.split-img{position:relative;overflow:hidden}
.split-img img{width:100%;height:100%;object-fit:cover;position:absolute;inset:0}
.split-text{display:flex;flex-direction:column;justify-content:center;padding:clamp(40px,6vw,80px) clamp(28px,4.5vw,56px);position:relative;z-index:2}
.split-text::before{content:"";position:absolute;inset:0;pointer-events:none;z-index:-1;background:var(--noir-chaud);background-image:radial-gradient(ellipse 70% 50% at 10% 90%,rgba(200,16,46,.05),transparent 60%)}
.split.reverse .split-text::before{background-image:radial-gradient(ellipse 70% 50% at 90% 90%,rgba(200,16,46,.05),transparent 60%)}

.eyebrow{font-size:.66rem;font-weight:600;letter-spacing:.26em;text-transform:uppercase;color:var(--rouge);margin-bottom:14px}
.split-title{font-weight:700;font-size:clamp(1.5rem,3.2vw,2.4rem);line-height:1.08;margin-bottom:14px}
.split-sub{font-size:clamp(.94rem,1.4vw,1.06rem);color:var(--gris-c);line-height:1.65;max-width:36ch}

.hero-split .split-text{padding-top:clamp(90px,13vh,150px);padding-bottom:clamp(50px,9vh,110px)}
.hero-split .split-title{font-size:clamp(2rem,4.5vw,3.6rem);line-height:1.02}
.hero-split .hero-phrase{font-family:var(--accent);font-style:italic;font-weight:400;font-size:clamp(.94rem,1.5vw,1.14rem);color:var(--gris-c);margin-top:16px;max-width:30ch;line-height:1.55}
.badge{display:inline-flex;align-items:center;gap:7px;margin-top:20px;font-size:.64rem;font-weight:500;letter-spacing:.2em;text-transform:uppercase;color:var(--gris)}
.badge::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--rouge);box-shadow:0 0 8px 2px rgba(200,16,46,.6)}

.sep{height:1px;background:linear-gradient(90deg,transparent 5%,rgba(200,16,46,.1) 30%,rgba(200,16,46,.1) 70%,transparent 95%)}

/* TRIPTYQUE */
.triptyque{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:rgba(200,16,46,.04)}
.tuile{position:relative;aspect-ratio:3/4;overflow:hidden}
.tuile img{width:100%;height:100%;object-fit:cover;transition:transform 5s ease}
.tuile:hover img{transform:scale(1.03)}
.tuile::after{content:"";position:absolute;inset:0;background:linear-gradient(0deg,rgba(12,10,10,.8) 0%,rgba(12,10,10,.15) 40%,transparent 100%)}
.tuile-label{position:absolute;bottom:0;left:0;right:0;z-index:2;padding:20px 22px;font-weight:600;font-size:.88rem;letter-spacing:.03em}
.tuile-s{display:block;font-weight:400;font-size:.76rem;color:var(--gris-c);margin-top:4px}

/* SECTION BLOC */
.section{position:relative;background:var(--noir-section)}
.section::before{content:"";position:absolute;inset:0;pointer-events:none;background:radial-gradient(ellipse 50% 40% at 50% 100%,rgba(200,16,46,.03),transparent 55%)}
.bloc{max-width:var(--mesure);margin:0 auto;padding:clamp(64px,9vw,130px) var(--bord);position:relative;z-index:2}
.section-eyebrow{font-size:.66rem;font-weight:600;letter-spacing:.24em;text-transform:uppercase;color:var(--rouge);margin-bottom:12px}
.section-title{font-weight:700;font-size:clamp(1.4rem,3vw,2.1rem);margin-bottom:36px}

/* REFS */
.refs-cat{font-size:.68rem;font-weight:600;letter-spacing:.18em;text-transform:uppercase;color:var(--gris);margin-top:26px;margin-bottom:10px}
.refs-cat:first-of-type{margin-top:0}
.mur{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:rgba(200,16,46,.04);border:1px solid rgba(200,16,46,.05)}
.mur-c{background:var(--noir-section);min-height:88px;display:flex;align-items:center;justify-content:center;font-weight:500;font-size:.8rem;letter-spacing:.1em;text-transform:uppercase;color:var(--gris-sourd);text-align:center;padding:12px 6px;transition:color .4s,background .4s}
.mur-c:hover{color:var(--blanc);background:rgba(200,16,46,.04)}
.refs-note{margin-top:20px;font-size:.76rem;color:var(--gris-sourd)}

/* TECH */
.tech{position:relative;background:var(--noir-chaud)}
.tech::before{content:"";position:absolute;inset:0;pointer-events:none;background:radial-gradient(ellipse 40% 50% at 0% 50%,rgba(200,16,46,.03),transparent 50%)}
.tech .bloc{padding:clamp(44px,6vw,80px) var(--bord)}
.tech-head{display:flex;align-items:baseline;gap:14px;flex-wrap:wrap;cursor:pointer;user-select:none}
.tech-head h2{font-weight:700;font-size:clamp(1.2rem,2.6vw,1.7rem);margin:0}
.tech-head .sub{font-size:.74rem;color:var(--gris);letter-spacing:.04em}
.tech-head .ch{margin-left:auto;color:var(--rouge);transition:transform .4s;font-size:1rem}
.tech-head.open .ch{transform:rotate(180deg)}
.tech-body{max-height:0;overflow:hidden;transition:max-height .55s,opacity .45s;opacity:0}
.tech-body.open{max-height:440px;opacity:1}
.tech-grid{display:grid;grid-template-columns:1fr 1fr;gap:1px 28px;margin-top:22px;font-size:.94rem;color:var(--gris-c)}
.tech-grid div{padding:10px 0;border-bottom:1px solid rgba(200,16,46,.05)}
.tech-grid .k{color:var(--gris);font-size:.66rem;letter-spacing:.15em;text-transform:uppercase;display:block;margin-bottom:2px}

/* VENIR */
.venir{position:relative;overflow:hidden;background:var(--noir-section)}
.venir::before{content:"";position:absolute;inset:0;pointer-events:none;background:radial-gradient(ellipse 40% 45% at 50% 110%,rgba(200,16,46,.07),transparent 55%)}
.venir .bloc{text-align:center;display:flex;flex-direction:column;align-items:center}
.venir-title{font-weight:700;font-size:clamp(1.6rem,3.8vw,2.6rem);margin-bottom:14px}
.venir-addr{font-size:.98rem;color:var(--gris-c);line-height:1.8;max-width:28ch}
.venir-addr strong{color:var(--blanc);font-weight:600}
.cta{display:inline-flex;align-items:center;gap:10px;margin-top:18px;font-size:.72rem;font-weight:600;letter-spacing:.15em;text-transform:uppercase;color:var(--blanc);border:1px solid var(--rouge);padding:12px 20px;border-radius:2px;background:rgba(200,16,46,.05);transition:background .4s,box-shadow .4s}
.cta:hover{background:rgba(200,16,46,.14);box-shadow:0 0 24px -6px rgba(200,16,46,.5)}
.cta .arr{transition:transform .4s}.cta:hover .arr{transform:translateX(4px)}
.venir-bloc{margin-bottom:32px}
.venir-rdv{font-size:.84rem;color:var(--gris);margin-top:5px;margin-bottom:16px}
.metro{display:inline-flex;align-items:center;justify-content:center;width:19px;height:19px;border-radius:50%;font-size:.64rem;font-weight:700;color:#fff;vertical-align:middle;margin:0 1px}
.m4{background:#BE418D}.m6{background:#76C882}.m12{background:#007852}.m13{background:#88CDE7;color:#1a3a4a}
.venir-sep{border-top:1px solid rgba(200,16,46,.07);padding-top:24px;margin-bottom:32px}
.venir-st{font-weight:700;font-size:1rem;letter-spacing:.03em;margin-bottom:5px}
.venir-desc{font-size:.9rem;color:var(--gris-c);max-width:32ch;margin:0 auto 14px;line-height:1.6}
.cta-sec{border-color:rgba(255,255,255,.1);background:transparent}
.cta-sec:hover{border-color:rgba(255,255,255,.22);background:rgba(255,255,255,.03);box-shadow:none}

/* FOOTER */
footer{background:var(--noir);padding:clamp(36px,5vw,52px) var(--bord) 24px;border-top:1px solid rgba(200,16,46,.05)}
.foot{max-width:var(--mesure);margin:0 auto;display:flex;justify-content:space-between;align-items:flex-end;gap:20px;flex-wrap:wrap}
.foot-logo{height:24px;opacity:.55}
.foot-i{font-size:.7rem;color:var(--gris-sourd);line-height:1.9;text-align:right}
.foot-i a:hover{color:var(--gris)}

/* REVEAL */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .8s,transform .8s}
.reveal.vu{opacity:1;transform:none}

/* GRID CARDS (portfolio, realisations) */
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:28px}
.card{background:var(--noir-chaud);border:1px solid rgba(200,16,46,.06);border-radius:4px;padding:28px 24px;position:relative}
.card::before{content:"";position:absolute;inset:0;border-radius:4px;pointer-events:none;background:radial-gradient(ellipse 70% 50% at 50% 100%,rgba(200,16,46,.03),transparent 55%)}
.card h3{font-weight:700;font-size:1rem;margin-bottom:10px;position:relative;z-index:1}
.card h3::after{content:"";display:block;width:28px;height:2px;background:var(--rouge);margin-top:8px}
.card p{font-size:.9rem;color:var(--gris-c);line-height:1.6;position:relative;z-index:1;margin-bottom:14px}
.video-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px;position:relative;z-index:1}
.video-thumb{position:relative;display:block;border-radius:3px;overflow:hidden;aspect-ratio:16/9}
.video-thumb img{width:100%;height:100%;object-fit:cover}
.video-thumb::after{content:"";position:absolute;inset:0;background:rgba(0,0,0,.25);transition:background .3s}
.video-thumb:hover::after{background:rgba(0,0,0,.1)}
.play{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:36px;height:36px;border-radius:50%;background:rgba(200,16,46,.85);display:flex;align-items:center;justify-content:center;z-index:2}
.play::after{content:"";border-left:10px solid #fff;border-top:6px solid transparent;border-bottom:6px solid transparent;margin-left:2px}

/* FORMAT GRID (portfolio) */
.format-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:20px}
.format-card{position:relative;border-radius:4px;overflow:hidden;aspect-ratio:16/10}
.format-card img{width:100%;height:100%;object-fit:cover;transition:transform 4s ease}
.format-card:hover img{transform:scale(1.03)}
.format-card::after{content:"";position:absolute;inset:0;background:linear-gradient(0deg,rgba(12,10,10,.75) 0%,rgba(12,10,10,.1) 45%,transparent 100%)}
.format-label{position:absolute;bottom:0;left:0;right:0;z-index:2;padding:16px 18px}
.format-label h4{font-weight:600;font-size:.88rem;margin-bottom:3px}
.format-label p{font-size:.76rem;color:var(--gris-c);line-height:1.4}

/* Q&A */
.qa-item{border-bottom:1px solid rgba(200,16,46,.06);padding:20px 0}
.qa-q{font-weight:600;font-size:1rem;cursor:pointer;display:flex;justify-content:space-between;align-items:center;gap:16px;user-select:none}
.qa-q .ch{color:var(--rouge);transition:transform .3s;font-size:.9rem;flex-shrink:0}
.qa-q.open .ch{transform:rotate(180deg)}
.qa-a{max-height:0;overflow:hidden;transition:max-height .5s,opacity .4s;opacity:0;font-size:.94rem;color:var(--gris-c);line-height:1.65}
.qa-a.open{max-height:300px;opacity:1;padding-top:12px}
.qa-a a{color:var(--rouge);text-decoration:underline;text-underline-offset:3px}

/* PAGE HEADER */
.page-header{padding:clamp(100px,14vh,150px) var(--bord) clamp(40px,5vw,60px);max-width:var(--mesure);margin:0 auto}
.page-header h1{font-weight:700;font-size:clamp(1.8rem,4vw,3rem);margin-bottom:10px}
.page-header .lead{font-size:clamp(.96rem,1.5vw,1.1rem);color:var(--gris-c);max-width:44ch;line-height:1.6}

/* RESPONSIVE */
@media(max-width:860px){
  nav{display:none}.burger{display:block}
  .split,.split.reverse{grid-template-columns:1fr;min-height:auto;direction:ltr}
  .split-text{order:-1}
  .split-img{min-height:50vw}
  .triptyque{grid-template-columns:1fr;gap:0}.tuile{aspect-ratio:16/10}
  .mur{grid-template-columns:repeat(2,1fr)}
  .tech-grid{grid-template-columns:1fr}
  .grid-2{grid-template-columns:1fr}
  .format-grid{grid-template-columns:1fr}
}
@media(max-width:480px){
  .hero-split .split-title{font-size:1.8rem}
  .mur-c{min-height:68px;font-size:.7rem}
}
@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}.reveal{opacity:1;transform:none}}