/* GDR Agency — charte noir & blanc */
:root{
  --ink:#0A0A0A;
  --paper:#F5F5F5;
  --steel:#9A9A9A;
  --surface:#141414;
  --line:rgba(255,255,255,.1);
  --line-strong:rgba(255,255,255,.22);
  --sans:"Helvetica Neue",Helvetica,"Segoe UI",Arial,"Noto Sans","Noto Sans Arabic","Noto Sans SC",sans-serif;
  --mono:ui-monospace,"SF Mono",Menlo,Consolas,monospace;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.01ms!important;transition-duration:.01ms!important}
}
body{
  background:var(--ink);color:var(--paper);
  font-family:var(--sans);font-size:16px;line-height:1.65;
  -webkit-font-smoothing:antialiased;overflow-x:hidden;
}
::selection{background:var(--paper);color:var(--ink)}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
:focus-visible{outline:2px solid var(--paper);outline-offset:3px}
.wrap{max-width:1200px;margin-inline:auto;padding-inline:clamp(20px,5vw,48px)}
.mono{font-family:var(--mono);font-size:.7rem;letter-spacing:.16em;text-transform:uppercase;color:var(--steel)}
[dir="rtl"] .mono{letter-spacing:.04em}

/* ===== header ===== */
header{
  position:fixed;inset-inline:0;top:0;z-index:200;
  background:rgba(10,10,10,.85);
  -webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);
  border-bottom:1px solid var(--line);
}
.nav{display:flex;align-items:center;justify-content:space-between;gap:16px;height:66px}
.brand{font-weight:800;font-size:1.5rem;letter-spacing:-.05em;line-height:1;flex:none}
.nav-links{display:flex;gap:clamp(14px,2.2vw,30px)}
.nav-links a{font-size:.84rem;color:var(--steel);transition:color .25s;white-space:nowrap}
.nav-links a:hover{color:var(--paper)}
.nav-links a[aria-current="page"]{color:var(--paper)}
.nav-right{display:flex;align-items:center;gap:12px}
.nav-cta{
  display:inline-flex;align-items:center;
  border:1px solid var(--paper);padding:9px 16px;
  font-size:.72rem;font-weight:600;letter-spacing:.1em;text-transform:uppercase;white-space:nowrap;
  transition:background .25s,color .25s;
}
.nav-cta:hover{background:var(--paper);color:var(--ink)}
[dir="rtl"] .nav-cta{letter-spacing:.02em}
@media(max-width:1080px){.nav-cta{display:none}}

/* language dropdown */
.langsel{position:relative}
.langsel-btn{
  display:flex;align-items:center;gap:8px;
  border:1px solid var(--line-strong);
  padding:9px 12px;font-size:.78rem;color:var(--paper);
  transition:border-color .25s;
}
.langsel-btn:hover{border-color:var(--paper)}
.langsel-btn svg{width:15px;height:15px;stroke:var(--steel);fill:none}
.langsel-btn .chev{width:11px;height:11px;stroke:var(--steel);transition:transform .25s}
.langsel.open .langsel-btn .chev{transform:rotate(180deg)}
.langsel-menu{
  position:absolute;top:calc(100% + 8px);inset-inline-end:0;min-width:190px;
  background:var(--surface);border:1px solid var(--line-strong);
  padding:6px;list-style:none;
  box-shadow:0 18px 50px rgba(0,0,0,.6);
  opacity:0;transform:translateY(-6px);pointer-events:none;
  transition:opacity .2s,transform .2s;
}
.langsel.open .langsel-menu{opacity:1;transform:none;pointer-events:auto}
.langsel-menu button{
  display:flex;justify-content:space-between;align-items:center;gap:14px;
  width:100%;padding:10px 12px;font-size:.86rem;
  color:var(--steel);text-align:start;transition:background .2s,color .2s;
}
.langsel-menu button:hover{background:rgba(255,255,255,.06);color:var(--paper)}
.langsel-menu button[aria-current="true"]{color:var(--paper);font-weight:600}
.langsel-menu button .code{font-family:var(--mono);font-size:.62rem;letter-spacing:.1em;color:var(--steel)}

/* burger */
.burger{display:none;flex-direction:column;gap:5px;padding:10px 6px}
.burger span{display:block;width:22px;height:1.5px;background:var(--paper);transition:transform .3s,opacity .3s}
.menu-open .burger span:nth-child(1){transform:translateY(6.5px) rotate(45deg)}
.menu-open .burger span:nth-child(2){opacity:0}
.menu-open .burger span:nth-child(3){transform:translateY(-6.5px) rotate(-45deg)}
.mobile-nav{
  display:none;flex-direction:column;
  border-top:1px solid var(--line);background:rgba(10,10,10,.97);
  padding:10px clamp(20px,5vw,48px) 22px;
  max-height:calc(100vh - 66px);overflow-y:auto;
}
.mobile-nav a{padding:14px 0;font-size:1.02rem;border-bottom:1px solid var(--line);color:var(--paper)}
.mobile-nav a[aria-current="page"]{color:var(--steel)}
.mobile-nav a:last-child{border-bottom:0}
.menu-open .mobile-nav{display:flex}
@media(max-width:900px){
  .nav-links{display:none}
  .burger{display:flex}
}

/* ===== boutons ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:12px;
  padding:17px 32px;border:1px solid var(--paper);
  font-size:.78rem;font-weight:600;letter-spacing:.14em;text-transform:uppercase;
  white-space:nowrap;
  transition:background .25s,color .25s;
}
[dir="rtl"] .btn{letter-spacing:.02em}
.btn .arr{display:inline-block;transition:transform .25s;font-family:var(--sans)}
.btn:hover .arr{transform:translateX(5px)}
[dir="rtl"] .btn .arr{transform:scaleX(-1)}
[dir="rtl"] .btn:hover .arr{transform:scaleX(-1) translateX(5px)}
.btn-solid{background:var(--paper);color:var(--ink)}
.btn-solid:hover{background:transparent;color:var(--paper)}
.btn-ghost:hover{background:var(--paper);color:var(--ink)}
@media(max-width:640px){
  .hero-cta{flex-direction:column;align-items:stretch}
  .hero-cta .btn{width:100%}
}

/* ===== hero (accueil) ===== */
.hero{
  position:relative;min-height:100svh;
  display:flex;flex-direction:column;justify-content:center;
  padding-top:66px;
}
.hero-bg{
  position:absolute;inset:0;z-index:-1;
  background:url('/IMAGES/optimized/hero-bw.webp') center/cover no-repeat;
  opacity:.5;
}
.hero-bg::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(10,10,10,.55) 0%,rgba(10,10,10,.25) 45%,var(--ink) 100%);
}
.hero-inner{padding-block:clamp(60px,9vh,110px)}
.kicker{margin-bottom:22px}
.hero .kicker{opacity:0;animation:rise .8s cubic-bezier(.2,.7,.2,1) .1s forwards}
h1{
  font-size:clamp(2.2rem,6vw,4.6rem);
  font-weight:800;letter-spacing:-.035em;line-height:1.05;
  max-width:17ch;text-wrap:balance;
}
.hero h1{opacity:0;animation:rise .9s cubic-bezier(.2,.7,.2,1) .22s forwards}
[dir="rtl"] h1{letter-spacing:0;line-height:1.25}
html[lang="zh"] h1{letter-spacing:0;line-height:1.18}
.hero-sub{
  margin-top:22px;max-width:52ch;color:#C9C9C9;
  font-size:clamp(1rem,1.4vw,1.15rem);
  opacity:0;animation:rise .9s cubic-bezier(.2,.7,.2,1) .38s forwards;
}
.hero-cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:36px;opacity:0;animation:rise .9s cubic-bezier(.2,.7,.2,1) .52s forwards}
@keyframes rise{from{opacity:0;transform:translateY(24px)}to{opacity:1;transform:none}}
.hero-stats{
  display:grid;grid-template-columns:repeat(4,auto);justify-content:start;
  gap:clamp(24px,6vw,80px);
  border-top:1px solid var(--line);
  padding-block:26px;
  opacity:0;animation:rise .9s cubic-bezier(.2,.7,.2,1) .68s forwards;
}
.hero-stats b{display:block;font-size:clamp(1.5rem,2.6vw,2.2rem);font-weight:800;letter-spacing:-.02em;font-variant-numeric:tabular-nums}
.hero-stats span{font-size:.78rem;color:var(--steel)}
@media(max-width:640px){
  .hero-stats{grid-template-columns:1fr 1fr;gap:20px 24px}
}

/* ===== hero (pages internes) ===== */
.page-hero{padding-top:calc(66px + clamp(56px,9vh,110px));padding-bottom:clamp(40px,6vh,70px)}
.page-hero .lead{margin-top:20px;max-width:56ch;color:var(--steel);font-size:clamp(1rem,1.3vw,1.12rem)}

/* ===== sections ===== */
section{padding-block:clamp(64px,10vh,120px)}
.sec-head{margin-bottom:clamp(34px,5vh,58px);max-width:680px}
h2{font-size:clamp(1.7rem,3.4vw,2.7rem);font-weight:800;letter-spacing:-.03em;line-height:1.1;text-wrap:balance;margin-top:14px}
[dir="rtl"] h2,html[lang="zh"] h2{letter-spacing:0;line-height:1.3}
.sec-intro{color:var(--steel);margin-top:12px;font-size:1rem;max-width:54ch}

/* services (accueil) */
.svc-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(255px,1fr));gap:1px;background:var(--line);border:1px solid var(--line)}
.svc{
  display:flex;flex-direction:column;
  background:var(--ink);padding:clamp(24px,3vw,34px);
  transition:background .3s;
}
.svc:hover{background:var(--surface)}
.svc svg{width:26px;height:26px;stroke:var(--paper);stroke-width:1.4;fill:none;stroke-linecap:round;stroke-linejoin:round}
.svc h3{font-size:1.05rem;font-weight:700;margin-top:18px;letter-spacing:-.01em}
.svc p{font-size:.87rem;color:var(--steel);margin-top:8px;flex:1}
.svc .more{
  display:inline-flex;align-items:center;gap:7px;margin-top:18px;
  font-family:var(--mono);font-size:.64rem;letter-spacing:.12em;text-transform:uppercase;color:var(--steel);
  transition:color .25s;
}
[dir="rtl"] .svc .more{letter-spacing:.03em}
.svc:hover .more{color:var(--paper)}
.svc .more .arr{transition:transform .25s}
.svc:hover .more .arr{transform:translateX(4px)}
[dir="rtl"] .svc .more .arr{transform:scaleX(-1)}
[dir="rtl"] .svc:hover .more .arr{transform:scaleX(-1) translateX(4px)}

/* détail (pages internes) */
.detail-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(290px,1fr));gap:clamp(28px,4vw,48px) clamp(28px,4vw,56px)}
.detail{border-top:1px solid var(--line-strong);padding-top:18px}
.detail h3{font-size:1.08rem;font-weight:700;letter-spacing:-.01em}
.detail p{font-size:.9rem;color:var(--steel);margin-top:8px}

/* piliers (approche) */
.pillars{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:clamp(24px,3.5vw,44px)}
.pillar{border-top:1px solid var(--line-strong);padding-top:18px}
.pillar h3{font-size:1.1rem;font-weight:700}
.pillar p{font-size:.9rem;color:var(--steel);margin-top:8px}

/* réalisations */
.work{background:var(--surface);border-block:1px solid var(--line)}
.work-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:clamp(16px,2.4vw,28px)}
.proj{display:block;border:1px solid var(--line);overflow:hidden;background:var(--ink);transition:border-color .3s,transform .3s}
.proj:hover{border-color:var(--line-strong);transform:translateY(-4px)}
.proj figure{aspect-ratio:16/10;overflow:hidden}
.proj img{
  width:100%;height:100%;object-fit:cover;object-position:top;
  filter:grayscale(1) contrast(1.05);
  transition:filter .45s,transform .45s;
}
.proj:hover img{filter:grayscale(0);transform:scale(1.03)}
@media(hover:none){.proj img{filter:grayscale(0)}}
.proj-meta{display:flex;justify-content:space-between;align-items:center;gap:10px;padding:16px 18px;border-top:1px solid var(--line)}
.proj-meta b{font-size:.95rem;font-weight:700}
.proj-meta span{font-family:var(--mono);font-size:.62rem;letter-spacing:.12em;text-transform:uppercase;color:var(--steel)}
[dir="rtl"] .proj-meta span{letter-spacing:.04em}

/* bases */
.bases{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:1px;background:var(--line);border:1px solid var(--line)}
.base{background:var(--ink);padding:clamp(24px,3vw,36px);transition:background .3s}
.base:hover{background:var(--surface)}
.base b{display:block;font-size:clamp(1.5rem,2.4vw,2rem);font-weight:800;letter-spacing:-.02em;line-height:1.2}
.base small{display:block;font-size:.8rem;color:var(--steel);margin-top:6px}
.base .tm{font-family:var(--mono);font-size:.78rem;color:var(--steel);margin-top:16px;font-variant-numeric:tabular-nums}
.zones{margin-top:20px;font-family:var(--mono);font-size:.68rem;letter-spacing:.14em;text-transform:uppercase;color:var(--steel)}
[dir="rtl"] .zones{letter-spacing:.04em}

/* bande CTA */
.cta-band{border-top:1px solid var(--line)}
.cta-band .inner{
  display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap;
  padding-block:clamp(50px,8vh,90px);
}
.cta-band h2{margin-top:0}
@media(max-width:640px){
  .cta-band .inner{flex-direction:column;align-items:stretch}
  .cta-band .btn{width:100%}
}

/* contact */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:clamp(32px,5vw,72px);align-items:start}
@media(max-width:860px){.contact-grid{grid-template-columns:1fr}}
.c-info{display:flex;flex-direction:column;gap:18px;margin-top:34px}
.c-info > div{border-top:1px solid var(--line);padding-top:13px}
.c-info .mono{display:block;margin-bottom:4px}
.c-info a{border-bottom:1px solid var(--line-strong)}
.c-info a:hover{border-color:var(--paper)}
.c-form{display:flex;flex-direction:column;gap:18px;border:1px solid var(--line);padding:clamp(22px,3vw,34px);background:var(--surface)}
.c-form label{display:flex;flex-direction:column;gap:7px}
.c-form input,.c-form select,.c-form textarea{
  background:transparent;border:0;border-bottom:1px solid var(--line-strong);
  color:var(--paper);font:inherit;font-size:.95rem;padding:9px 2px;border-radius:0;
  transition:border-color .25s;width:100%;
}
.c-form textarea{resize:vertical;min-height:100px}
.c-form option{background:var(--ink);color:var(--paper)}
.c-form input:focus,.c-form select:focus,.c-form textarea:focus{outline:none;border-bottom-color:var(--paper)}
.c-form .hp{position:absolute;left:-9999px;width:1px;height:1px;opacity:0}
.g-recaptcha{transform-origin:0 0}
[dir="rtl"] .g-recaptcha{transform-origin:100% 0}
@media(max-width:380px){.g-recaptcha{transform:scale(.85)}}
.c-form .btn{align-self:flex-start}
@media(max-width:640px){.c-form .btn{align-self:stretch;width:100%}}
#formStatus{min-height:1.4em;text-transform:none;letter-spacing:.02em}

/* footer */
footer{border-top:1px solid var(--line);padding-block:clamp(36px,6vh,60px) 30px}
.foot{display:flex;justify-content:space-between;align-items:flex-start;gap:28px;flex-wrap:wrap}
.foot-brand{font-weight:800;font-size:1.6rem;letter-spacing:-.05em}
.foot-tag{color:var(--steel);font-size:.85rem;margin-top:8px;max-width:38ch}
.foot-links{display:flex;gap:clamp(16px,2.6vw,32px);flex-wrap:wrap}
.foot-links a{font-size:.85rem;color:var(--steel)}
.foot-links a:hover{color:var(--paper)}
.foot-base{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-top:clamp(28px,4vh,44px);padding-top:20px;border-top:1px solid var(--line)}
.foot-base span{font-family:var(--mono);font-size:.62rem;letter-spacing:.1em;color:var(--steel)}

/* globe */
.globe-wrap{display:flex;justify-content:center}
.globe-box{width:min(92vw,580px)}
#globe{display:block;width:100%;touch-action:pan-y;cursor:grab}
.globe-hint{text-align:center;margin-top:14px}

/* articles villes */
.city-art{
  display:grid;grid-template-columns:1fr 1fr;
  gap:clamp(24px,4vw,60px);align-items:center;
  padding-block:clamp(40px,7vh,72px);
  border-top:1px solid var(--line);
  scroll-margin-top:90px;
}
.city-art.flip figure{order:2}
@media(max-width:820px){
  .city-art{grid-template-columns:1fr}
  .city-art.flip figure{order:0}
}
.city-art figure{border:1px solid var(--line);overflow:hidden;margin:0}
.city-art img{
  width:100%;aspect-ratio:3/2;object-fit:cover;
  filter:grayscale(1) contrast(1.04);
  transition:filter .5s,transform .5s;
}
.city-art:hover img{filter:grayscale(0);transform:scale(1.02)}
@media(hover:none){.city-art img{filter:grayscale(0)}}
.city-art figcaption{
  padding:8px 12px;border-top:1px solid var(--line);
  font-size:.56rem;letter-spacing:.06em;color:rgba(154,154,154,.7);
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}
.city-art h2{margin-top:10px}
.city-role{font-size:1rem;color:var(--paper);margin-top:8px;font-weight:600}
.city-p{font-size:.92rem;color:var(--steel);margin-top:12px;max-width:52ch}
.credits{padding-bottom:40px;font-size:.58rem;color:rgba(154,154,154,.55)}

/* reveal */
.rv{opacity:0;transform:translateY(26px);transition:opacity .7s cubic-bezier(.2,.7,.2,1),transform .7s cubic-bezier(.2,.7,.2,1)}
.rv.in{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){.rv{opacity:1;transform:none}}