/* =========================================================
   DESIGN SYSTEM · minimal typographique
   ========================================================= */

:root{
  --bg:#ffffff;
  --bg-soft:#f6f5f3;
  --bg-dark:#0d0d0d;
  --ink:#0e0e0e;
  --muted:#6b6b6b;
  --faint:#9a9a9a;
  --line:#e7e5e1;
  --line-dark:rgba(255,255,255,.16);
  --paper:#f5f2ec;
  --sans:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
  --ease:cubic-bezier(0.16,1,0.3,1);
  --maxw:1320px;
  --pad:48px;
}

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

html{
  scroll-behavior:smooth;
  -webkit-text-size-adjust:100%;
}

body{
  font-family:var(--sans);
  background:var(--bg);
  color:var(--ink);
  line-height:1.6;
  font-weight:400;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

img{
  display:block;
  max-width:100%;
}

a{
  color:inherit;
  text-decoration:none;
}

::selection{
  background:var(--ink);
  color:var(--bg);
}

/* =========================================================
   HELPERS
   ========================================================= */

.shell{
  width:100%;
  max-width:var(--maxw);
  margin-inline:auto;
  padding-inline:var(--pad);
}

.eyebrow{
  font-size:11px;
  font-weight:500;
  text-transform:uppercase;
  letter-spacing:.24em;
  color:var(--muted);
}

.display{
  font-weight:600;
  letter-spacing:-.035em;
  line-height:.98;
}

/* =========================================================
   REVEAL (expressif, composité)
   ========================================================= */

[data-reveal]{
  opacity:0;
  transform:translateY(42px);
  transition:
    opacity 1s var(--ease),
    transform 1.1s var(--ease);
  will-change:opacity,transform;
}

[data-reveal].in{
  opacity:1;
  transform:none;
  will-change:auto;
}

@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  [data-reveal]{opacity:1 !important;transform:none !important;transition:none !important;}
  [data-parallax]{transform:none !important;}
}

/* =========================================================
   HEADER
   ========================================================= */

.site-header{
  position:fixed;
  inset:0 0 auto 0;
  z-index:100;
  display:flex;
  align-items:center;
  justify-content:space-between;
  height:76px;
  padding-inline:var(--pad);
  color:var(--ink);
  transition:background .4s var(--ease),border-color .4s var(--ease),color .3s var(--ease);
  border-bottom:1px solid transparent;
}

.site-header.scrolled{
  background:rgba(255,255,255,.82);
  -webkit-backdrop-filter:saturate(180%) blur(14px);
  backdrop-filter:saturate(180%) blur(14px);
  border-bottom-color:var(--line);
}

.site-header.on-dark{
  color:var(--paper);
}

.site-header.on-dark.scrolled{
  background:rgba(13,13,13,.6);
  border-bottom-color:var(--line-dark);
}

.wordmark{
  font-size:15px;
  font-weight:600;
  letter-spacing:.02em;
}

.wordmark span{
  color:var(--muted);
  font-weight:400;
}

.site-header.on-dark .wordmark span{
  color:var(--faint);
}

.nav{
  display:flex;
  gap:34px;
}

.nav a{
  font-size:12px;
  font-weight:500;
  letter-spacing:.04em;
  color:inherit;
  opacity:.6;
  transition:opacity .25s var(--ease);
}

.nav a:hover,
.nav a.active{
  opacity:1;
}

/* burger */

.burger{
  display:none;
  width:30px;
  height:30px;
  border:0;
  background:transparent;
  cursor:pointer;
  position:relative;
  z-index:120;
}

.burger span{
  position:absolute;
  left:4px;
  right:4px;
  height:1.5px;
  background:currentColor;
  transition:transform .35s var(--ease),opacity .25s var(--ease);
}

.burger span:nth-child(1){top:11px;}
.burger span:nth-child(2){bottom:11px;}

.burger.open span{color:var(--paper);}
.burger.open span:nth-child(1){transform:translateY(3px) rotate(45deg);}
.burger.open span:nth-child(2){transform:translateY(-3px) rotate(-45deg);}

/* mobile overlay */

.nav-overlay{
  position:fixed;
  inset:0;
  z-index:110;
  background:var(--bg-dark);
  color:var(--paper);
  display:flex;
  align-items:center;
  justify-content:center;
  opacity:0;
  pointer-events:none;
  transition:opacity .4s var(--ease);
}

.nav-overlay.active{
  opacity:1;
  pointer-events:auto;
}

.nav-overlay nav{
  display:flex;
  flex-direction:column;
  gap:28px;
  text-align:center;
}

.nav-overlay a{
  font-size:clamp(30px,9vw,52px);
  font-weight:500;
  letter-spacing:-.02em;
  opacity:0;
  transform:translateY(14px);
  transition:opacity .5s var(--ease),transform .5s var(--ease);
}

.nav-overlay.active a{opacity:1;transform:none;}
.nav-overlay.active a:nth-child(1){transition-delay:.06s;}
.nav-overlay.active a:nth-child(2){transition-delay:.12s;}
.nav-overlay.active a:nth-child(3){transition-delay:.18s;}
.nav-overlay.active a:nth-child(4){transition-delay:.24s;}
.nav-overlay.active a:nth-child(5){transition-delay:.30s;}

@media(max-width:860px){
  .nav{display:none;}
  .burger{display:block;}
}

/* =========================================================
   SECTION SCAFFOLD
   ========================================================= */

.section{
  padding-block:clamp(90px,12vw,170px);
}

.section-head{
  display:flex;
  align-items:baseline;
  justify-content:space-between;
  gap:24px;
  padding-bottom:36px;
  margin-bottom:56px;
  border-bottom:1px solid var(--line);
}

.section-head h2{
  font-size:clamp(28px,4vw,46px);
  font-weight:600;
  letter-spacing:-.03em;
  line-height:1;
}

.section-head .count{
  font-size:12px;
  letter-spacing:.04em;
  color:var(--muted);
  white-space:nowrap;
}

/* =========================================================
   HERO (accueil + immobilier)
   ========================================================= */

.hero{
  padding-top:140px;
  padding-bottom:40px;
}

.hero-eyebrow{
  margin-bottom:34px;
}

.hero-title{
  font-size:clamp(46px,8.5vw,128px);
  font-weight:600;
  letter-spacing:-.045em;
  line-height:.94;
}

.hero-row{
  display:flex;
  justify-content:space-between;
  align-items:flex-end;
  gap:30px;
  margin-top:48px;
  padding-top:26px;
  border-top:1px solid var(--line);
}

.hero-row p{
  max-width:34ch;
  font-size:15px;
  line-height:1.7;
  color:var(--muted);
}

.hero-row .scroll{
  font-size:12px;
  letter-spacing:.04em;
  color:var(--ink);
  white-space:nowrap;
  opacity:.7;
  transition:opacity .25s var(--ease);
}

.hero-row .scroll:hover{opacity:1;}

.hero-feature{
  margin-top:64px;
  width:100%;
  aspect-ratio:16/9;
  overflow:hidden;
  background:var(--bg-soft);
}

.hero-feature img{
  width:100%;
  height:108%;
  object-fit:cover;
  filter:saturate(.92);
}

@media(max-width:760px){
  .hero{padding-top:104px;}
  .hero-row{flex-direction:column;align-items:flex-start;gap:18px;margin-top:30px;}
  .hero-feature{aspect-ratio:16/9;margin-top:40px;}
}

/* =========================================================
   WORK GRID (index)
   ========================================================= */

.work{
  display:flex;
  gap:28px;
  align-items:flex-start;
}

.work-col{
  flex:1;
  min-width:0;
  display:flex;
  flex-direction:column;
  gap:28px;
}

.work figure{
  margin:0;
  position:relative;
  overflow:hidden;
  cursor:pointer;
  background:var(--bg-soft);
}

.work figure[data-ratio="3-4"]{aspect-ratio:3/4;}
.work figure[data-ratio="16-9"]{aspect-ratio:16/9;}

.work img{
  width:100%;
  height:100%;
  object-fit:cover;
  filter:saturate(.9);
  transition:transform .7s var(--ease),filter .5s var(--ease);
}

.work figure:hover img{
  transform:scale(1.03);
  filter:saturate(1);
}

@media(max-width:760px){
  .work{flex-direction:column;gap:14px;}
  .work-col{gap:14px;}
}

/* =========================================================
   STATEMENT / APPROACH
   ========================================================= */

.statement{
  display:grid;
  grid-template-columns:minmax(0,200px) minmax(0,1fr);
  gap:clamp(32px,6vw,90px);
  align-items:start;
}

.statement .label{
  font-size:11px;
  text-transform:uppercase;
  letter-spacing:.24em;
  color:var(--muted);
  padding-top:10px;
}

.statement p{
  font-size:clamp(22px,3vw,34px);
  line-height:1.4;
  font-weight:400;
  letter-spacing:-.015em;
}

.statement p strong{
  font-weight:600;
}

@media(max-width:760px){
  .statement{grid-template-columns:1fr;gap:20px;}
}

/* =========================================================
   STUDIO / ABOUT
   ========================================================= */

.studio{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:clamp(32px,6vw,90px);
  align-items:center;
}

.studio-media{
  aspect-ratio:4/5;
  overflow:hidden;
  background:var(--bg-soft);
}

.studio-media img{
  width:100%;
  height:100%;
  object-fit:cover;
  object-position:center 25%;
  filter:grayscale(100%);
  transition:filter .6s var(--ease),transform .9s var(--ease);
}

.studio-media:hover img{
  filter:grayscale(0);
}

.studio h2{
  font-size:clamp(30px,4.5vw,56px);
  font-weight:600;
  letter-spacing:-.03em;
  line-height:1.02;
  margin-bottom:28px;
}

.studio p{
  font-size:16px;
  line-height:1.8;
  color:var(--muted);
  max-width:46ch;
}

@media(max-width:760px){
  .studio{grid-template-columns:1fr;gap:32px;}
  .studio-media{aspect-ratio:3/4;}
}

/* =========================================================
   CONTACT (dark)
   ========================================================= */

.contact{
  background:var(--bg-dark);
  color:var(--paper);
  text-align:center;
  padding-block:clamp(110px,16vw,210px);
}

.contact h2{
  font-size:clamp(44px,9vw,128px);
  font-weight:600;
  letter-spacing:-.04em;
  line-height:.95;
}

.contact .lines{
  margin-top:40px;
  display:flex;
  gap:14px;
  justify-content:center;
  align-items:center;
  flex-wrap:wrap;
  font-size:14px;
  letter-spacing:.02em;
  color:var(--faint);
}

.contact .lines a{
  color:var(--paper);
  border-bottom:1px solid rgba(245,242,236,.35);
  padding-bottom:2px;
  transition:border-color .3s var(--ease);
}

.contact .lines a:hover{border-color:var(--paper);}

.contact .cta{
  display:inline-block;
  margin-top:54px;
  padding:18px 42px;
  border:1px solid rgba(245,242,236,.4);
  border-radius:100px;
  font-size:12px;
  text-transform:uppercase;
  letter-spacing:.18em;
  transition:background .3s var(--ease),color .3s var(--ease),border-color .3s var(--ease);
}

.contact .cta:hover{
  background:var(--paper);
  color:var(--ink);
  border-color:var(--paper);
}

/* =========================================================
   FOOTER
   ========================================================= */

.site-footer{
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:16px;
  padding:42px var(--pad);
  border-top:1px solid var(--line);
  font-size:11px;
  text-transform:uppercase;
  letter-spacing:.16em;
  color:var(--muted);
}

.site-footer a{
  color:var(--ink);
  border-bottom:1px solid var(--ink);
  padding-bottom:1px;
}

@media(max-width:600px){
  .site-footer{flex-direction:column;gap:14px;text-align:center;}
}

/* =========================================================
   LIGHTBOX
   ========================================================= */

.lightbox{
  position:fixed;
  inset:0;
  background:rgba(8,8,8,.97);
  z-index:1000;
  display:none;
  align-items:center;
  justify-content:center;
}

.lightbox.active{display:flex;}

.lb-image{
  max-width:92vw;
  max-height:88vh;
  object-fit:contain;
}

.lb-close,
.lb-prev,
.lb-next{
  position:absolute;
  background:transparent;
  border:0;
  color:var(--paper);
  cursor:pointer;
  font-weight:300;
  line-height:1;
  opacity:.7;
  transition:opacity .25s var(--ease);
}

.lb-close:hover,
.lb-prev:hover,
.lb-next:hover{opacity:1;}

.lb-close{top:22px;right:26px;font-size:34px;}
.lb-prev,
.lb-next{top:50%;transform:translateY(-50%);font-size:46px;padding:12px;}
.lb-prev{left:18px;}
.lb-next{right:18px;}

.lb-counter{
  position:absolute;
  bottom:26px;
  left:50%;
  transform:translateX(-50%);
  font-size:11px;
  letter-spacing:.28em;
  color:var(--faint);
}

@media(max-width:600px){
  .lb-prev,.lb-next{font-size:32px;}
}

/* =========================================================
   GLOBAL RESPONSIVE PADDING
   ========================================================= */

@media(max-width:760px){
  :root{--pad:20px;}
  .site-header{height:64px;}
}