/* =============================================
   VOLT — Design tokens
   ============================================= */
:root{
  --black: #0a0a0a;
  --true-black: #000000;
  --white: #ffffff;
  --off-white: #f4f4f2;
  --green: #98ff00;
  --green-dim: #7ccf02;
  --gray: #8a8a8a;
  --gray-light: #d8d8d5;
  --gray-border: #2a2a2a;

  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'Inter', sans-serif;

  --container: 1240px;
  --section-pad: clamp(72px, 10vw, 140px);
}

*{ margin:0; padding:0; box-sizing:border-box; }

html{ scroll-behavior:smooth; }

body{
  font-family: var(--font-body);
  background:var(--off-white);
  color: var(--black);
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}

img{ max-width:100%; display:block; }
a{ color:inherit; text-decoration:none; }
ul{ list-style:none; }
button{ font-family:inherit; border:none; background:none; cursor:pointer; }

@media (prefers-reduced-motion: reduce){
  *{ animation-duration:0.001ms !important; transition-duration:0.001ms !important; }
  html{ scroll-behavior:auto; }
}

h1,h2,h3,h4{ font-family:var(--font-display); font-weight:700; line-height:1.05; letter-spacing:-0.01em; }

.text-green{ color:var(--green); }

.noise-overlay{
  position:fixed; inset:0; pointer-events:none; z-index:9999;
  opacity:0.025;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  mix-blend-mode:overlay;
}

/* =============================================
   NAV
   ============================================= */
.site-nav{
  position:fixed; top:0; left:0; right:0; z-index:1000;
  padding:22px 0;
  transition:background .35s ease, padding .35s ease, box-shadow .35s ease;
}
.site-nav.scrolled{
  background:rgba(10,10,10,0.85);
  backdrop-filter:blur(10px);
  padding:14px 0;
  box-shadow:0 1px 0 rgba(255,255,255,0.06);
}
.nav-inner{
  max-width:var(--container); margin:0 auto; padding:0 28px;
  display:flex; align-items:center; justify-content:space-between;
}
.nav-logo img{ height:38px; width:auto; filter:brightness(0) invert(1); }
.site-nav.scrolled .nav-logo img{ filter:none; height:32px; }
.nav-links{ display:flex; align-items:center; gap:34px; }
.nav-links a{
  font-size:14px; font-weight:500; color:var(--white);
  opacity:0.85; transition:opacity .2s ease;
  white-space:nowrap;
}
.nav-links a:hover{ opacity:1; }
.nav-cta{
  padding:9px 20px; border:1px solid var(--green);
  border-radius:999px; color:var(--green) !important; opacity:1 !important;
}
.nav-cta:hover{ background:var(--green); color:var(--true-black) !important; }
.nav-burger{ display:none; flex-direction:column; gap:5px; width:28px; }
.nav-burger span{ height:2px; width:100%; background:var(--white); border-radius:2px; }

/* =============================================
   HERO
   ============================================= */
.hero{
  position:relative; min-height:100vh; display:flex; align-items:flex-end;
  overflow:hidden; background:var(--true-black);
}
.hero-bg{
  position:absolute; inset:0; background-size:cover; background-position:50% 30%;
  filter:grayscale(100%) contrast(1.05);
  animation:heroZoom 18s ease-out forwards;
}
@keyframes heroZoom{ from{ transform:scale(1.08);} to{ transform:scale(1);} }
.hero-scrim{
  position:absolute; inset:0;
  background:linear-gradient(180deg, rgba(0,0,0,0.55) 0%, rgba(0,0,0,0.35) 40%, rgba(0,0,0,0.92) 100%);
}
.hero-triangle{
  position:absolute; top:-6%; right:8%; width:32vw; max-width:440px;
  mix-blend-mode:screen; opacity:0.7;
  animation:floatV 9s ease-in-out infinite;
}
@keyframes floatV{ 0%,100%{ transform:translateY(0);} 50%{ transform:translateY(18px);} }
.hero-content{
  position:relative; z-index:2; max-width:var(--container); margin:0 auto;
  padding:0 28px 100px; width:100%;
}
.eyebrow{
  color:var(--green); font-size:13px; font-weight:600; letter-spacing:0.12em;
  text-transform:uppercase; margin-bottom:22px;
}
.hero h1{
  color:var(--white); font-size:clamp(40px, 7vw, 88px); margin-bottom:26px;
}
.hero-sub{
  color:var(--gray-light); font-size:clamp(16px,1.6vw,19px); max-width:520px;
  margin-bottom:38px; line-height:1.55;
}
.hero-actions{ display:flex; gap:16px; flex-wrap:wrap; }

.btn{
  display:inline-flex; align-items:center; justify-content:center;
  padding:15px 30px; border-radius:999px; font-weight:600; font-size:15px;
  transition:all .25s ease; border:1px solid transparent;
}
.btn-primary{ background:var(--green); color:var(--true-black); }
.btn-primary:hover{ background:var(--white); transform:translateY(-2px); }
.btn-ghost{ border-color:rgba(255,255,255,0.35); color:var(--white); }
.btn-ghost:hover{ border-color:var(--white); background:rgba(255,255,255,0.08); }

.scroll-cue{
  position:absolute; bottom:36px; left:50%; transform:translateX(-50%); z-index:2;
  width:26px; height:42px; border:2px solid rgba(255,255,255,0.5); border-radius:16px;
}
.scroll-cue span{
  position:absolute; top:8px; left:50%; transform:translateX(-50%);
  width:4px; height:8px; background:var(--green); border-radius:2px;
  animation:scrollDot 1.8s ease infinite;
}
@keyframes scrollDot{ 0%{ opacity:1; top:8px;} 70%{ opacity:0; top:22px;} 100%{ opacity:0; top:8px;} }

/* =============================================
   SECTION shared
   ============================================= */
.section{
  padding:var(--section-pad) 28px;
  max-width:var(--container); margin:0 auto;
}
.section-tag{
  font-size:13px; font-weight:600; letter-spacing:0.1em; text-transform:uppercase;
  color:var(--green-dim); margin-bottom:16px;
}
.section-tag-light{ color:var(--green); }
.section h2{ font-size:clamp(30px, 4vw, 50px); max-width:760px; margin-bottom:8px; }
.section-heading-light{ color:var(--white); font-size:clamp(30px,4vw,50px); max-width:760px; }
.lead{ font-size:19px; line-height:1.6; margin-bottom:20px; }
.section p{ color:#4a4a4a; line-height:1.7; font-size:16px; max-width:640px; }

.reveal{ opacity:0; transform:translateY(28px); transition:opacity .7s ease, transform .7s ease; }
.reveal.in-view{ opacity:1; transform:translateY(0); }

/* =============================================
   QUI SOMMES NOUS — split
   ============================================= */
.split-section{
  display:grid; grid-template-columns:0.9fr 1.1fr; gap:70px; align-items:center;
  padding-top:var(--section-pad); padding-bottom:var(--section-pad);
}
.split-text p{ max-width:none; }
.split-image{ position:relative; }
.split-image img{ width:100%; border-radius:2px; filter:grayscale(35%); aspect-ratio:4/3.2; object-fit:cover; }
.v-mark{
  position:absolute; width:40%; top:18%; left:10%;
  mix-blend-mode:multiply; opacity:0.9;
}

/* =============================================
   ATOUTS — dark
   ============================================= */
.dark-section{
  max-width:none; background:var(--true-black); padding:var(--section-pad) 28px;
}
.dark-section > .section-tag, .dark-section > h2{
  max-width:var(--container); margin-left:auto; margin-right:auto;
}
.atouts-grid{
  max-width:var(--container); margin:56px auto 0;
  display:grid; grid-template-columns:repeat(3, 1fr); gap:1px;
  background:var(--gray-border);
  border:1px solid var(--gray-border);
}
.atout-card{
  background:var(--true-black); padding:44px 36px;
}
.atout-icon{
  width:54px; height:54px; color:var(--green); margin-bottom:26px;
}
.atout-icon svg{ width:100%; height:100%; }
.atout-card h3{ color:var(--white); font-size:21px; margin-bottom:14px; }
.atout-card p{ color:var(--gray-light); font-size:15px; line-height:1.65; max-width:none; }

/* =============================================
   EXPERTISES — tabs
   ============================================= */
.expertise-tabs{ margin-top:56px; }
.tabs-nav{
  display:flex; gap:6px; border-bottom:1px solid #ddd; margin-bottom:48px;
  overflow-x:auto; scrollbar-width:none;
}
.tabs-nav::-webkit-scrollbar{ display:none; }
.tab-btn{
  padding:16px 22px; font-family:var(--font-display); font-weight:600; font-size:16px;
  color:var(--gray); white-space:nowrap; position:relative; transition:color .2s ease;
}
.tab-btn::after{
  content:''; position:absolute; bottom:-1px; left:0; right:0; height:2px;
  background:var(--green); transform:scaleX(0); transition:transform .25s ease;
}
.tab-btn.active{ color:var(--black); }
.tab-btn.active::after{ transform:scaleX(1); }
.tab-btn:hover{ color:var(--black); }

.tab-pane{ display:none; }
.tab-pane.active{ display:block; animation:fadeIn .4s ease; }
@keyframes fadeIn{ from{ opacity:0; transform:translateY(8px);} to{ opacity:1; transform:translateY(0);} }

.pane-grid{ display:grid; grid-template-columns:0.8fr 1.2fr; gap:60px; }
.pane-text h3{ font-size:32px; margin-bottom:18px; }
.pane-intro{ font-size:17px; line-height:1.65; color:#3a3a3a; }
.pane-list{
  display:grid; grid-template-columns:1fr 1fr; gap:14px 28px;
  align-content:start;
}
.pane-list li{
  font-size:15.5px; padding-left:22px; position:relative; line-height:1.5; color:#2a2a2a;
}
.pane-list li::before{
  content:''; position:absolute; left:0; top:8px; width:9px; height:9px;
  background:var(--green); clip-path:polygon(0 0, 100% 0, 50% 100%);
}

/* =============================================
   CTA banners
   ============================================= */
.cta-banner, .closing-cta{
  position:relative; background-size:cover; background-position:center;
  display:flex; align-items:center; justify-content:center; text-align:center;
  padding:140px 28px; overflow:hidden;
}
.cta-scrim{ position:absolute; inset:0; background:rgba(0,0,0,0.6); }
.cta-banner-content, .closing-cta-content{ position:relative; z-index:2; max-width:800px; }
.cta-banner h2{ color:var(--white); font-size:clamp(28px,4.2vw,46px); }
.closing-logo{ height:34px; width:auto; margin:0 auto 26px; }
.closing-cta h2{ color:var(--white); font-size:clamp(28px,4.5vw,50px); }
.closing-cta{ padding:160px 28px; }

/* =============================================
   PORTFOLIO
   ============================================= */
.portfolio-grid{
  margin-top:56px;
  display:grid; grid-template-columns:repeat(3, 1fr); gap:26px;
}
.portfolio-card{
  position:relative; overflow:hidden; border-radius:3px; background:var(--true-black);
  aspect-ratio:4/3.3;
}
.portfolio-card-large{ grid-column:span 2; grid-row:span 2; aspect-ratio:auto; }
.portfolio-card img{
  position:absolute; inset:0; width:100%; height:100%; object-fit:cover;
  transition:transform .5s ease, filter .5s ease; filter:grayscale(60%);
}
.portfolio-card:hover img{ transform:scale(1.06); filter:grayscale(0%); }
.portfolio-info{
  position:absolute; left:0; right:0; bottom:0; padding:28px;
  background:linear-gradient(0deg, rgba(0,0,0,0.92) 0%, rgba(0,0,0,0.55) 55%, rgba(0,0,0,0) 100%);
}
.portfolio-tag{
  display:inline-block; font-size:11.5px; font-weight:600; letter-spacing:0.08em;
  text-transform:uppercase; color:var(--green); margin-bottom:10px;
}
.portfolio-info h3{ color:var(--white); font-size:19px; margin-bottom:8px; max-width:420px; }
.portfolio-info p{
  color:var(--gray-light); font-size:14px; line-height:1.5; max-width:420px;
  opacity:0; max-height:0; overflow:hidden; transition:opacity .3s ease, max-height .3s ease, margin-top .3s ease;
  display:-webkit-box; -webkit-box-orient:vertical; -webkit-line-clamp:3;
}
.portfolio-card:hover .portfolio-info p{ opacity:1; max-height:120px; margin-top:2px; }
.portfolio-card-large .portfolio-info p{ opacity:1; max-height:120px; -webkit-line-clamp:4; }

.portfolio-card-wide{ display:none; } /* legacy, unused */

.portfolio-link{
  display:inline-block; margin-top:8px; color:var(--green); font-weight:600; font-size:13px;
}
.portfolio-card-link{ cursor:pointer; }
.portfolio-card-video{ cursor:pointer; }
.play-badge{
  position:absolute; top:50%; left:50%; transform:translate(-50%,-50%);
  width:58px; height:58px; border-radius:50%; background:rgba(0,0,0,0.55);
  border:1.5px solid rgba(255,255,255,0.7);
  display:flex; align-items:center; justify-content:center; color:var(--white);
  transition:transform .25s ease, background .25s ease; z-index:2;
}
.play-badge svg{ width:22px; height:22px; margin-left:3px; }
.portfolio-card-video:hover .play-badge{ transform:translate(-50%,-50%) scale(1.12); background:var(--green); color:var(--true-black); border-color:var(--green); }

/* =============================================
   LIGHTBOX
   ============================================= */
.lightbox{
  position:fixed; inset:0; z-index:2000; display:none; align-items:center; justify-content:center;
  padding:24px;
}
.lightbox.open{ display:flex; }
.lightbox-backdrop{ position:absolute; inset:0; background:rgba(0,0,0,0.88); }
.lightbox-panel{
  position:relative; z-index:2; background:var(--true-black); border:1px solid var(--gray-border);
  border-radius:6px; max-width:820px; width:100%; max-height:92vh; overflow-y:auto; padding:20px;
}
.lightbox-close{
  position:absolute; top:10px; right:14px; font-size:30px; color:var(--white); line-height:1;
  z-index:3; opacity:0.7; transition:opacity .2s ease;
}
.lightbox-close:hover{ opacity:1; }
.lightbox-video-wrap{ background:#000; border-radius:4px; overflow:hidden; }
.lightbox-video-wrap video{ width:100%; max-height:60vh; display:block; margin:0 auto; }
.lightbox-tabs{ display:flex; flex-wrap:wrap; gap:8px; margin-top:16px; }
.lightbox-tab{
  padding:9px 16px; font-size:13px; border:1px solid var(--gray-border); border-radius:999px;
  color:var(--gray-light); transition:all .2s ease;
}
.lightbox-tab.active, .lightbox-tab:hover{ border-color:var(--green); color:var(--green); }
.lightbox-gallery{
  display:grid; grid-template-columns:repeat(3, 1fr); gap:10px; margin-top:18px;
}
.lightbox-gallery img{ border-radius:4px; aspect-ratio:3/4; object-fit:cover; }

@media (max-width: 600px){
  .lightbox-gallery{ grid-template-columns:repeat(3, 1fr); }
  .lightbox-panel{ padding:14px; }
}

/* =============================================
   FOOTER
   ============================================= */
.site-footer{ background:var(--true-black); padding-top:var(--section-pad); }
.footer-inner{ max-width:var(--container); margin:0 auto; padding:0 28px; }
.footer-main{ padding-bottom:70px; border-bottom:1px solid var(--gray-border); }
.footer-main .btn{ margin-top:28px; }
.footer-meta{
  display:grid; grid-template-columns:1.4fr 1fr 1fr; gap:40px;
  padding:56px 0; border-bottom:1px solid var(--gray-border);
}
.footer-col h4{
  color:var(--white); font-size:14px; letter-spacing:0.06em; text-transform:uppercase;
  margin-bottom:18px; font-weight:600;
}
.footer-col p{ color:var(--gray); font-size:14.5px; line-height:1.6; max-width:none; }
.footer-col a{
  display:block; color:var(--gray); font-size:14.5px; margin-bottom:10px;
  transition:color .2s ease;
}
.footer-col a:hover{ color:var(--green); }
.footer-bottom{
  display:flex; justify-content:space-between; padding:26px 0; flex-wrap:wrap; gap:10px;
  color:var(--gray); font-size:13px;
}

/* =============================================
   RESPONSIVE
   ============================================= */
@media (max-width: 980px){
  .split-section{ grid-template-columns:1fr; gap:44px; }
  .split-image{ order:-1; }
  .atouts-grid{ grid-template-columns:1fr; }
  .pane-grid{ grid-template-columns:1fr; gap:28px; }
  .pane-list{ grid-template-columns:1fr; }
  .portfolio-grid{ grid-template-columns:repeat(2, 1fr); }
  .portfolio-card-large{ grid-column:span 2; }
  .footer-meta{ grid-template-columns:1fr 1fr; }
}

@media (max-width: 720px){
  .nav-links{
    position:fixed; top:0; right:-100%; width:78%; max-width:320px; height:100vh;
    background:var(--true-black); flex-direction:column; align-items:flex-start;
    justify-content:center; gap:26px; padding:40px; transition:right .35s ease;
  }
  .nav-links.open{ right:0; box-shadow:-10px 0 30px rgba(0,0,0,0.4); }
  .nav-links a{ font-size:18px; }
  .nav-burger{ display:flex; z-index:1001; }
  .hero h1{ font-size:12vw; }
  .portfolio-grid{ grid-template-columns:1fr; }
  .portfolio-card-large{ grid-column:span 1; aspect-ratio:4/3.3; }
  .footer-meta{ grid-template-columns:1fr; }
  .footer-bottom{ flex-direction:column; }
  .tabs-nav{ gap:0; }
  .tab-btn{ padding:14px 16px; font-size:14px; }
}