:root{
    --paper:#F5F8FC; --card:#FFFFFF; --ink:#16202B; --muted:#5B6472;
    --petrol:#0D53B1; --petrol-2:#0B4694; --petrol-soft:#E5EEFA;
    --amber:#FE4B91; --line:#E2E7EE; --line-2:#CCD5E1;
    --disp:'Archivo',system-ui,sans-serif;
    --body:'Inter',system-ui,-apple-system,sans-serif;
    --mono:'Space Mono','SFMono-Regular',monospace;
    --maxw:1080px;
  }
  *{box-sizing:border-box}
  html{scroll-behavior:smooth}
  body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--body);font-size:16px;line-height:1.55;-webkit-font-smoothing:antialiased}
  a{color:inherit}
  .wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}

  /* ---------- nav ---------- */
  header{position:sticky;top:0;z-index:50;background:color-mix(in srgb,var(--paper) 88%,transparent);backdrop-filter:saturate(140%) blur(10px);border-bottom:1px solid var(--line)}
  .nav{display:flex;align-items:center;justify-content:space-between;height:104px}
  .brand{display:flex;align-items:center;gap:10px;text-decoration:none;font-family:var(--disp);font-weight:800;letter-spacing:.02em;font-size:18px}
  .brand .mark{width:26px;height:auto;flex:0 0 auto;display:block}
  .brand .logo{height:80px;width:auto;display:block}
  .brand .logo-foot{height:42px;opacity:.95}
  .brand span.sub{font-family:var(--mono);font-weight:400;font-size:11px;color:var(--muted);letter-spacing:.06em;align-self:center}
  .navlinks{display:flex;align-items:center;gap:28px}
  .navlinks a{text-decoration:none;font-size:14px;font-weight:500;color:var(--muted);transition:color .15s}
  .navlinks a:hover{color:var(--ink)}
  .navlinks a.navcta{font-family:var(--body);font-weight:600;font-size:14px;color:#fff;background:var(--petrol);border:0;border-radius:9px;padding:9px 16px;text-decoration:none;transition:background .15s}
  .navlinks a.navcta:hover{color:#fff;background:var(--petrol-2)}
  .burger{display:none;border:1px solid var(--line-2);background:var(--card);border-radius:9px;width:40px;height:38px;cursor:pointer;align-items:center;justify-content:center}
  .burger svg{display:block}

  /* ---------- hero ---------- */
  .hero{padding:64px 0 64px;border-bottom:1px solid var(--line)}
  .hero-grid{display:grid;grid-template-columns:1.35fr .65fr;gap:48px;align-items:center}
  .eyebrow{font-family:var(--mono);font-size:12.5px;letter-spacing:.14em;color:var(--petrol);text-transform:uppercase;margin:0 0 20px;display:flex;gap:10px;flex-wrap:wrap}
  .eyebrow span{position:relative;padding-left:14px}
  .eyebrow span::before{content:'';position:absolute;left:0;top:50%;width:6px;height:6px;transform:translateY(-50%) rotate(45deg);background:var(--amber)}
  h1{font-family:var(--disp);font-weight:800;font-size:clamp(34px,5.2vw,56px);line-height:1.04;letter-spacing:-.02em;margin:0 0 20px}
  h1 em{font-style:normal;color:var(--petrol)}
  .lead{font-size:18px;color:var(--muted);max-width:30em;margin:0 0 30px}
  .cta-row{display:flex;gap:12px;flex-wrap:wrap}
  .btn{font-family:var(--body);font-weight:600;font-size:15px;text-decoration:none;border-radius:10px;padding:13px 22px;display:inline-flex;align-items:center;gap:8px;transition:background .15s,border-color .15s,transform .12s;cursor:pointer;border:1px solid transparent}
  .btn.primary{background:var(--petrol);color:#fff}
  .btn.primary:hover{background:var(--petrol-2);transform:translateY(-1px)}
  .btn.ghost{background:transparent;color:var(--ink);border-color:var(--line-2)}
  .btn.ghost:hover{border-color:var(--ink)}

  /* hero dossier index — the signature element */
  .dossier{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:6px;box-shadow:0 1px 0 rgba(0,0,0,.02),0 14px 30px -26px rgba(13,83,177,.18)}
  .dossier-head{display:flex;align-items:center;justify-content:space-between;padding:14px 14px 12px;border-bottom:1px solid var(--line)}
  .dossier-head .t{font-family:var(--mono);font-size:11.5px;letter-spacing:.08em;color:var(--muted);text-transform:uppercase}
  .dossier-head .d{width:14px;height:14px;transform:rotate(45deg);border:2px solid var(--amber);border-radius:2px}
  .drow{display:flex;align-items:center;gap:10px;padding:12px 13px;border-bottom:1px solid var(--line)}
  .drow:last-child{border-bottom:0}
  .drow .code{font-family:var(--mono);font-size:11px;font-weight:700;color:var(--petrol);background:var(--petrol-soft);border-radius:6px;padding:5px 8px;white-space:nowrap;flex:0 0 auto}
  .drow .lbl{font-size:13px;font-weight:600;flex:1}
  .drow .stat{font-family:var(--mono);font-size:11px;color:var(--muted);white-space:nowrap}
  .drow .stat b{color:#1D8A5E;font-weight:700}

  /* ---------- section frame ---------- */
  section{padding:72px 0}
  .sec-head{margin-bottom:38px;max-width:44em}
  .sec-tag{font-family:var(--mono);font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:var(--amber);margin:0 0 12px}
  h2{font-family:var(--disp);font-weight:700;font-size:clamp(26px,3.4vw,36px);letter-spacing:-.015em;line-height:1.1;margin:0 0 12px}
  .sec-head p{font-size:17px;color:var(--muted);margin:0}

  /* services */
  #hizmetler{background:var(--card);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
  .svc{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
  .svc-card{border:1px solid var(--line);border-radius:14px;padding:24px;background:var(--paper);transition:border-color .15s,transform .15s}
  .svc-card:hover{border-color:var(--petrol);transform:translateY(-3px)}
  .svc-card .ref{font-family:var(--mono);font-size:11px;font-weight:700;letter-spacing:.06em;color:var(--petrol);margin-bottom:18px;display:flex;align-items:center;gap:8px}
  .svc-card .ref::before{content:'';width:9px;height:9px;transform:rotate(45deg);background:var(--amber);flex:0 0 auto}
  .svc-card h3{font-family:var(--disp);font-weight:700;font-size:21px;margin:0 0 10px}
  .svc-card p{font-size:14.5px;color:var(--muted);margin:0}

  /* about + why */
  .about-grid{display:grid;grid-template-columns:1fr 1fr;gap:54px;align-items:start}
  .about-grid p{font-size:17px;color:var(--ink);margin:0 0 16px}
  .why{list-style:none;margin:0;padding:0;display:grid;gap:2px}
  .why li{display:flex;gap:14px;align-items:flex-start;padding:16px 0;border-top:1px solid var(--line)}
  .why li:first-child{border-top:0;padding-top:0}
  .why .n{font-family:var(--mono);font-size:12px;font-weight:700;color:var(--petrol);flex:0 0 auto;width:26px}
  .why .txt{font-size:15.5px;font-weight:500}
  .why .txt small{display:block;font-weight:400;color:var(--muted);font-size:13.5px;margin-top:2px}

  /* references */
  #referanslar{background:var(--petrol);color:#fff}
  #referanslar .sec-tag{color:#9FC2F0}
  #referanslar h2{color:#fff}
  #referanslar .sec-head p{color:#C7DBF4}
  .clients{display:flex;flex-wrap:wrap;gap:12px}
  .client{font-family:var(--disp);font-weight:600;font-size:16px;letter-spacing:.01em;color:#fff;border:1px solid rgba(255,255,255,.22);border-radius:10px;padding:14px 20px;background:rgba(255,255,255,.04)}


  /* references logo wall */
  .logo-wall{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
  .logo-slot{display:flex;align-items:center;justify-content:center;min-height:74px;border:1px dashed rgba(255,255,255,.30);border-radius:12px;background:rgba(255,255,255,.05);padding:14px;transition:background .15s,border-color .15s}
  .logo-slot:hover{background:rgba(255,255,255,.08);border-color:rgba(255,255,255,.5)}
  .logo-slot img{max-height:42px;max-width:78%;width:auto;object-fit:contain;filter:brightness(0) invert(1);opacity:.92}
  /* Kurumsal "negatif" (koyu zemin) logo dosyaları: monokrom filtresi uygulanmaz, marka rengi korunur. */
  .logo-slot img.brand-raw{filter:none;opacity:1}
  .logo-slot .ph{font-family:var(--disp);font-weight:600;font-size:15px;color:rgba(255,255,255,.72);text-align:center;line-height:1.1;letter-spacing:.01em}
  .logo-slot .ph small{display:block;font-family:var(--mono);font-weight:400;font-size:9.5px;letter-spacing:.16em;text-transform:uppercase;color:rgba(255,255,255,.4);margin-top:5px}
  .platforms{margin-top:30px;padding-top:26px;border-top:1px solid rgba(255,255,255,.16)}
  .plat-label{font-family:var(--mono);font-size:11.5px;letter-spacing:.1em;text-transform:uppercase;color:#9FC2F0;margin:0 0 14px}
  .plat-wall .logo-slot{min-height:60px}
  .plat-wall .logo-slot img{max-height:32px}
  .plat-wall .logo-slot .ph{font-size:14px}
  @media(max-width:860px){.logo-wall{grid-template-columns:repeat(2,1fr)}}

  /* contact */
  .contact-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:54px;align-items:center}
  .contact-card{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:8px}
  .crow{display:flex;gap:14px;padding:18px;border-bottom:1px solid var(--line);align-items:flex-start}
  .crow:last-child{border-bottom:0}
  .crow .k{font-family:var(--mono);font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);width:84px;flex:0 0 auto;padding-top:2px}
  .crow .v{font-size:15.5px;font-weight:500}
  .crow .v a{color:var(--petrol);text-decoration:none;font-weight:600}
  .crow .v a:hover{text-decoration:underline}
  .crow .v small{display:block;color:var(--muted);font-weight:400;font-size:13.5px}


  /* blog */
  .blog-top{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;flex-wrap:wrap;margin-bottom:32px}
  .blog-top .sec-head{margin-bottom:0}
  .blog-note{font-family:var(--mono);font-size:11.5px;color:var(--muted);background:var(--card);border:1px dashed var(--line-2);border-radius:8px;padding:8px 12px;white-space:nowrap}
  .posts{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
  .post{display:flex;flex-direction:column;background:var(--card);border:1px solid var(--line);border-radius:14px;padding:22px;text-decoration:none;color:inherit;transition:border-color .15s,transform .15s}
  .post:hover{border-color:var(--petrol);transform:translateY(-3px)}
  .post .cat{font-family:var(--mono);font-size:10.5px;font-weight:700;letter-spacing:.08em;color:var(--petrol);background:var(--petrol-soft);border-radius:6px;padding:4px 8px;align-self:flex-start;margin-bottom:16px}
  .post h3{font-family:var(--disp);font-weight:700;font-size:18px;line-height:1.22;margin:0 0 10px}
  .post p{font-size:13.5px;color:var(--muted);margin:0 0 18px;flex:1}
  .post .meta{font-family:var(--mono);font-size:11px;color:var(--muted);display:flex;gap:10px;align-items:center;border-top:1px solid var(--line);padding-top:14px}
  .post .meta .dot{width:4px;height:4px;border-radius:50%;background:var(--line-2)}
  @media(max-width:860px){.posts{grid-template-columns:1fr}}

  /* footer */
  footer{border-top:1px solid var(--line);padding:34px 0;color:var(--muted);font-size:13.5px}
  .foot{display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap}
  .foot .brand{font-size:15px}
  .foot a{color:var(--muted);text-decoration:none}
  .foot a:hover{color:var(--ink)}

  /* mobile */
  @media(max-width:860px){
    .hero-grid,.about-grid,.contact-grid{grid-template-columns:1fr;gap:36px}
    .svc{grid-template-columns:1fr}
    .navlinks{display:none}
    .navlinks.open{display:flex;position:absolute;top:104px;left:0;right:0;flex-direction:column;align-items:stretch;gap:0;background:var(--card);border-bottom:1px solid var(--line);padding:8px 24px 16px}
    .navlinks.open a{padding:12px 0;border-bottom:1px solid var(--line)}
    .navlinks.open .navcta{margin-top:12px;text-align:center}
    .burger{display:flex}
    .hero{padding:52px 0 48px}
    section{padding:56px 0}
  }
  @media(prefers-reduced-motion:reduce){
    html{scroll-behavior:auto}
    *{transition:none!important;animation:none!important}
  }
  /* focus */
  a:focus-visible,button:focus-visible{outline:2px solid var(--amber);outline-offset:2px;border-radius:6px}

  /* load reveal */
  .reveal{opacity:0;transform:translateY(10px);animation:rise .55s cubic-bezier(.2,.7,.3,1) forwards}
  .reveal.d1{animation-delay:.06s}.reveal.d2{animation-delay:.12s}.reveal.d3{animation-delay:.18s}.reveal.d4{animation-delay:.24s}
  @keyframes rise{to{opacity:1;transform:none}}