:root{
  --ink:#0b1c29;
  --ink2:#173246;
  --sea:#197a98;
  --sea2:#50a6ba;
  --foam:#eef5f4;
  --sand:#e6dfcf;
  --paper:#f8f7f3;
  --white:#ffffff;
  --muted:#67757d;
  --line:#cfdbdc;
  --radius:18px;
  --shadow:0 18px 60px rgba(12,32,44,.10);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--paper);color:var(--ink);
  font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  line-height:1.55;
}
a{color:inherit;text-decoration:none}
.container{width:min(1180px,calc(100% - 44px));margin:auto}
header{
  position:sticky;top:0;z-index:20;
  background:rgba(248,247,243,.88);backdrop-filter:blur(14px);
  border-bottom:1px solid rgba(11,28,41,.08)
}
.nav{height:78px;display:flex;align-items:center;justify-content:space-between;gap:30px}
.brand{display:flex;align-items:center;gap:13px;font-weight:800;letter-spacing:.18em;font-size:18px}
.mark{width:38px;height:38px;border:1.5px solid var(--ink);display:grid;place-items:center;position:relative}
.mark:before,.mark:after{content:"";position:absolute;width:23px;height:8px;border-top:2px solid var(--sea);border-radius:50%;transform:rotate(-10deg)}
.mark:after{transform:rotate(10deg);margin-top:8px}
.navlinks{display:flex;align-items:center;gap:28px;font-size:14px}
.navlinks a{opacity:.8}.navlinks a:hover{opacity:1}
.menu{display:none}
.hero{padding:88px 0 70px}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:64px;align-items:center}
.eyebrow{font-size:12px;font-weight:800;letter-spacing:.18em;text-transform:uppercase;color:var(--sea)}
h1{font-size:clamp(48px,6.5vw,88px);line-height:.94;letter-spacing:-.055em;margin:18px 0 28px;max-width:860px}
.hero p{font-size:20px;line-height:1.6;color:var(--ink2);max-width:720px}
.actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:34px}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  padding:13px 18px;border-radius:999px;font-weight:700;font-size:14px;border:1px solid var(--ink)
}
.btn.primary{background:var(--ink);color:white}
.btn.ghost{background:transparent}
.hero-meta{display:flex;gap:30px;flex-wrap:wrap;margin-top:42px;padding-top:22px;border-top:1px solid var(--line)}
.hero-meta div{font-size:13px;color:var(--muted)}
.hero-meta strong{display:block;color:var(--ink);font-size:15px;margin-bottom:2px}
.diagram{
  min-height:560px;border-radius:28px;background:linear-gradient(145deg,#0d2738,#17465a 54%,#216f84);
  box-shadow:var(--shadow);position:relative;overflow:hidden;padding:22px
}
.diagram .label{position:absolute;left:28px;top:26px;color:#d9edf1;font-size:11px;letter-spacing:.16em;text-transform:uppercase;z-index:2}
.diagram .caption{position:absolute;left:28px;bottom:24px;color:white;z-index:2;max-width:300px}
.diagram .caption b{display:block;font-size:19px;margin-bottom:3px}
.diagram .caption span{font-size:12px;opacity:.7}
svg{display:block;width:100%;height:100%}
.cred{border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:#f2f5f2}
.cred-grid{display:grid;grid-template-columns:repeat(4,1fr)}
.cred .item{padding:25px 22px;border-right:1px solid var(--line)}
.cred .item:last-child{border-right:0}
.cred .big{font-size:25px;font-weight:800;letter-spacing:-.03em}
.cred .small{font-size:12px;color:var(--muted);margin-top:3px}
section{padding:102px 0}
.section-head{display:grid;grid-template-columns:.7fr 1.3fr;gap:55px;margin-bottom:54px}
.section-head h2{font-size:clamp(34px,4vw,54px);line-height:1;letter-spacing:-.045em;margin:0}
.section-head p{font-size:18px;color:var(--ink2);margin:2px 0 0;max-width:720px}
.kicker{font-size:12px;font-weight:800;letter-spacing:.16em;text-transform:uppercase;color:var(--sea);margin-bottom:13px}
.expertise{background:white}
.cards{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.card{border:1px solid var(--line);border-radius:var(--radius);padding:30px;background:white;min-height:260px;position:relative;overflow:hidden}
.card .num{font-size:12px;color:var(--sea);font-weight:800;letter-spacing:.12em}
.card h3{font-size:26px;letter-spacing:-.03em;margin:46px 0 14px}
.card p{color:var(--muted);max-width:540px;margin:0}
.card:after{content:"";position:absolute;width:180px;height:180px;border:1px solid #dbe7e7;border-radius:50%;right:-90px;top:-90px}
.projects{background:var(--paper)}
.filters{display:flex;gap:9px;flex-wrap:wrap;margin-bottom:28px}
.filter{border:1px solid var(--line);background:transparent;padding:8px 13px;border-radius:999px;font-size:12px;font-weight:700;cursor:pointer}
.filter.active{background:var(--ink);color:white;border-color:var(--ink)}
.project-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.project{background:white;border:1px solid var(--line);border-radius:16px;padding:24px;min-height:220px;display:flex;flex-direction:column;justify-content:space-between}
.project .tag{font-size:11px;color:var(--sea);font-weight:800;text-transform:uppercase;letter-spacing:.12em}
.project h3{font-size:22px;letter-spacing:-.025em;line-height:1.13;margin:18px 0 12px}
.project .meta{font-size:12px;color:var(--muted);display:flex;justify-content:space-between;gap:15px;border-top:1px solid var(--line);padding-top:13px}
.project.hide{display:none}
.fullwidth{
  margin-top:18px;background:var(--ink);color:white;border-radius:18px;padding:38px 40px;
  display:grid;grid-template-columns:1fr auto;gap:30px;align-items:center
}
.fullwidth h3{font-size:30px;margin:0 0 7px;letter-spacing:-.03em}
.fullwidth p{margin:0;opacity:.68;max-width:740px}
.fullwidth .btn{border-color:white}
.approach{background:#eef3f2}
.process{display:grid;grid-template-columns:repeat(4,1fr);gap:0;border-top:1px solid #b9cbcc;border-bottom:1px solid #b9cbcc}
.step{padding:30px 26px;border-right:1px solid #b9cbcc}
.step:last-child{border-right:0}
.step .n{font-size:12px;font-weight:800;color:var(--sea)}
.step h3{font-size:22px;margin:45px 0 10px}
.step p{font-size:14px;color:var(--muted)}
.about-grid{display:grid;grid-template-columns:1.12fr .88fr;gap:66px;align-items:start}
.about h2{font-size:clamp(38px,5vw,66px);letter-spacing:-.05em;line-height:.98;margin:0 0 28px}
.about .lead{font-size:20px;color:var(--ink2)}
.quote{margin-top:34px;padding:24px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);font-size:15px;color:var(--muted)}
.factbox{background:var(--ink);color:white;border-radius:22px;padding:32px}
.factbox h3{font-size:14px;text-transform:uppercase;letter-spacing:.13em;color:#79b8c7;margin:0 0 26px}
.fact{padding:18px 0;border-top:1px solid rgba(255,255,255,.12)}
.fact:first-of-type{border-top:0}
.fact b{display:block;font-size:20px;margin-bottom:4px}
.fact span{font-size:13px;opacity:.65}
.contact{padding:90px 0;background:var(--ink);color:white}
.contact-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:60px}
.contact h2{font-size:clamp(42px,5vw,66px);line-height:.98;letter-spacing:-.045em;margin:0 0 22px}
.contact p{opacity:.7;max-width:650px;font-size:17px}
.contact .btn{border-color:white;margin-top:14px}
.details{display:grid;gap:24px;align-content:start}
.detail{border-top:1px solid rgba(255,255,255,.14);padding-top:14px}
.detail span{font-size:11px;letter-spacing:.14em;text-transform:uppercase;opacity:.55}
.detail b{display:block;font-size:16px;margin-top:4px;font-weight:600}
footer{background:#07141d;color:#a9b7bd;padding:24px 0;font-size:12px}
.footer-flex{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap}
.note{font-size:11px;opacity:.65}
[data-tr],[data-fr],[data-de]{display:none}
body.lang-tr [data-en],body.lang-fr [data-en],body.lang-de [data-en]{display:none}
body.lang-tr [data-tr],body.lang-fr [data-fr],body.lang-de [data-de]{display:inline}
.lang-switch{
  display:flex;align-items:center;gap:2px;padding:3px;
  border:1px solid rgba(11,28,41,.18);border-radius:999px;background:rgba(255,255,255,.35)
}
.lang-opt{
  border:0;background:transparent;color:var(--ink);cursor:pointer;
  padding:6px 8px;border-radius:999px;font-size:11px;font-weight:800;letter-spacing:.06em
}
.lang-opt.active{background:var(--ink);color:white}
@media(max-width:900px){
  .navlinks a:not(.langwrap){display:none}
  .hero-grid,.section-head,.about-grid,.contact-grid{grid-template-columns:1fr}
  .diagram{min-height:430px}
  .cred-grid{grid-template-columns:repeat(2,1fr)}
  .cred .item:nth-child(2){border-right:0}
  .cards{grid-template-columns:1fr}
  .project-grid{grid-template-columns:repeat(2,1fr)}
  .process{grid-template-columns:repeat(2,1fr)}
  .step:nth-child(2){border-right:0}
  .step:nth-child(-n+2){border-bottom:1px solid #b9cbcc}
  .fullwidth{grid-template-columns:1fr}
}
@media(max-width:600px){
  .container{width:min(100% - 28px,1180px)}
  .hero{padding-top:58px}
  h1{font-size:52px}
  .hero p{font-size:17px}
  .project-grid,.cred-grid,.process{grid-template-columns:1fr}
  .cred .item,.step{border-right:0;border-bottom:1px solid var(--line)}
  .step:nth-child(-n+2){border-bottom:1px solid #b9cbcc}
  .diagram{min-height:350px}
  .navlinks{gap:10px}
}