/* ===== Fiber Aydınlatma — birebir (Dorsa + Oswald, siyah) ===== */
@import url('https://fonts.googleapis.com/css2?family=Dorsa&family=Oswald:wght@200;300;400;500;600&display=swap');

:root{ --bg:#000; --ink:#fff; --muted:#b9b9bd; --line:rgba(255,255,255,.16); --wrap:1280px; }
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--ink);font-family:"Oswald",sans-serif;font-weight:300;
  line-height:1.7;-webkit-font-smoothing:antialiased;overflow-x:hidden}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
h1,h2,h3{font-family:"Dorsa",serif;font-weight:400;text-transform:none;line-height:.95;letter-spacing:.02em}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 clamp(20px,5vw,60px)}

/* header */
header{position:fixed;top:0;left:0;right:0;z-index:50;transition:.4s;padding:20px 0}
header.katfixed{background:rgba(0,0,0,.9);backdrop-filter:blur(10px);padding:12px 0;border-bottom:1px solid var(--line)}
.hbar{position:relative;display:flex;align-items:center;justify-content:space-between;gap:24px;padding-bottom:18px}
.logo{font-family:"Dorsa",serif;font-size:30px;letter-spacing:.06em;line-height:.9}
.logo small{display:block;font-family:"Oswald";font-size:9px;letter-spacing:.35em;opacity:.6;margin-top:3px}
nav{display:flex;gap:clamp(12px, 2vw, 28px);flex-wrap:nowrap;white-space:nowrap}
nav a{font-family:"Oswald";font-weight:400;font-size:14px;letter-spacing:.12em;text-transform:uppercase;
  color:rgba(255,255,255,.82);padding-bottom:4px;transition:.2s}
nav a:hover,nav a.aktif{color:#fff;border-bottom:1px solid #fff}
.diller{position:absolute;bottom:0;right:0;display:flex;gap:2px}
.diller a{font-family:"Oswald";font-size:12px;letter-spacing:.08em;color:rgba(255,255,255,.6);padding:4px 7px}
.diller a.aktif{color:#fff;border:1px solid var(--line);border-radius:3px}
.mnav-btn{display:none;background:none;border:0;color:#fff;font-size:26px;cursor:pointer}

/* buton */
.btn{display:inline-block;padding:16px 40px;border:1px solid rgba(255,255,255,.4);
  font-family:"Oswald";font-weight:400;font-size:13px;letter-spacing:.18em;text-transform:uppercase;transition:.3s}
.btn:hover{background:#fff;color:#000}

/* ANASAYFA — vitrin (split showcase) */
.vitrin{display:grid;grid-template-columns:1fr 1fr;min-height:92vh}
.vitrin:nth-child(even) .v-img{order:2}
.v-img{background-size:cover;background-position:center;min-height:340px}
.v-txt{display:flex;flex-direction:column;justify-content:center;padding:clamp(34px,6vw,110px);background:#000}
.v-txt h2{font-size:clamp(54px,8vw,128px);margin-bottom:8px}
.v-txt p{color:var(--muted);font-weight:300;max-width:46ch;margin:18px 0 36px;font-size:17px}

/* İÇ SAYFA — üst başlık */
.sayfa-ust{padding:clamp(150px,20vh,240px) 0 clamp(30px,5vw,70px)}
.sayfa-ust h1{font-size:clamp(64px,11vw,150px)}
.sayfa-ust p{color:var(--muted);max-width:60ch;margin-top:14px;font-size:17px}

/* proje blokları */
.blok{display:grid;grid-template-columns:1fr 1fr;gap:clamp(28px,4vw,70px);align-items:center;
  margin-bottom:clamp(50px,7vw,110px)}
.blok:nth-child(even) .b-gorsel{order:2}
.b-gorsel{aspect-ratio:4/3;overflow:hidden;background:#0c0c0c}
.b-gorsel img{width:100%;height:100%;object-fit:cover}
.b-gorsel.bos{display:flex;align-items:center;justify-content:center;border:1px solid var(--line)}
.b-gorsel.bos span{font-family:"Dorsa";font-size:40px;color:rgba(255,255,255,.25)}
.b-yazi h2{font-size:clamp(40px,5vw,72px);margin-bottom:18px}
.b-yazi p{color:var(--muted);font-weight:300;font-size:16.5px}

/* referanslar */
.ref{border-top:1px solid var(--line);padding:clamp(60px,8vw,110px) 0}
.ref h2{font-size:clamp(40px,6vw,90px);margin-bottom:30px}
.ref-liste{display:flex;flex-wrap:wrap;gap:12px 34px}
.ref-liste span{font-family:"Oswald";font-weight:300;font-size:clamp(16px,2vw,21px);color:var(--muted)}
.ref-liste span::before{content:"—";margin-right:12px;opacity:.5}

/* hakkımızda / iletişim */
.metin{max-width:70ch}
.metin p{color:var(--muted);font-weight:300;margin-bottom:20px;font-size:17px}
.iletisim-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:50px}
.ibox{border:1px solid var(--line);padding:30px}
.ibox .et{font-family:"Oswald";font-size:12px;letter-spacing:.2em;text-transform:uppercase;color:#fff;opacity:.6;margin-bottom:12px}
.ibox a,.ibox p{color:#fff;font-weight:300;font-size:15px}

/* footer */
footer{border-top:1px solid var(--line);padding:64px 0 36px}
.foot{display:flex;justify-content:space-between;gap:30px;flex-wrap:wrap}
.foot .logo{font-size:26px}
.foot .muted{color:var(--muted);font-weight:300;font-size:14px;max-width:34ch;margin-top:14px}
.foot h4{font-family:"Oswald";font-weight:500;letter-spacing:.14em;text-transform:uppercase;margin-bottom:14px;font-size:13px}
.foot a{color:var(--muted);font-weight:300;font-size:14px;display:block;margin-bottom:8px}
.foot a:hover{color:#fff}
.telif{margin-top:44px;padding-top:22px;border-top:1px solid var(--line);color:var(--muted);font-size:12.5px}

/* reveal */
.reveal{opacity:0;transform:translateY(24px);transition:.8s cubic-bezier(.2,.7,.2,1)}
.reveal.gor{opacity:1;transform:none}

/* RTL */
body[dir="rtl"] .blok:nth-child(even) .b-gorsel{order:0}
body[dir="rtl"] .vitrin:nth-child(even) .v-img{order:0}

/* MOBİL — her şey alt alta, tek kaynak */
@media(max-width:900px){
  .hbar{padding-bottom:0}
  nav,.diller{display:none}
  nav.acik{display:flex;position:fixed;inset:60px 0 auto 0;flex-direction:column;gap:0;
    background:rgba(0,0,0,.97);padding:8px 0;border-bottom:1px solid var(--line)}
  nav.acik a{padding:16px 30px;border-bottom:1px solid var(--line)}
  .diller.acik{display:flex;position:fixed;top:400px;left:30px}
  .mnav-btn{display:block}
  .vitrin{grid-template-columns:1fr}
  .vitrin:nth-child(even) .v-img{order:0}
  .v-img{min-height:56vw}
  .blok{grid-template-columns:1fr;gap:20px}
  .blok:nth-child(even) .b-gorsel{order:0}
  .iletisim-grid{grid-template-columns:1fr}
}

.ssmode .vitrin{min-height:520px}

/* ===== v3: video hero, karosel, iletişim, sosyal, logo ===== */
.logo-img{height:46px;width:auto;display:block}

/* HERO video */
.hero-video{position:relative;height:100vh;min-height:560px;overflow:hidden;background:#000}
.hero-video video{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.hero-fallback{position:absolute;inset:0;background:
  radial-gradient(1px 1px at 20% 30%,#fff,transparent),radial-gradient(1.5px 1.5px at 65% 20%,#cfe8ff,transparent),
  radial-gradient(1px 1px at 80% 55%,#fff,transparent),radial-gradient(1px 1px at 40% 75%,#bcdcff,transparent),
  radial-gradient(circle at 50% 40%,#0c1524 0%,#05060a 75%)}
.hero-kaplama{position:absolute;inset:0;background:linear-gradient(180deg,rgba(0,0,0,.45),rgba(0,0,0,.25) 45%,rgba(0,0,0,.8))}
.hero-ic{position:relative;z-index:2;height:100%;display:flex;flex-direction:column;justify-content:center}
.hero-ic h1{font-size:clamp(46px,9vw,120px)}
.hero-alt{color:#e6e6e6;font-weight:300;font-size:clamp(15px,2vw,20px);margin-top:18px;max-width:70ch}
.scroll-ipucu{position:absolute;bottom:26px;left:50%;transform:translateX(-50%);z-index:2;color:#fff;font-size:22px;opacity:.8;animation:zipla 1.7s infinite}
@keyframes zipla{0%,100%{transform:translate(-50%,0)}50%{transform:translate(-50%,10px)}}

/* Referans karoseli */
.karosel{overflow:hidden;padding:6px 0;-webkit-mask-image:linear-gradient(90deg,transparent,#000 8%,#000 92%,transparent)}
.karosel-sira{display:flex;gap:34px;width:max-content;animation:kaydir 34s linear infinite}
.karosel:hover .karosel-sira{animation-play-state:paused}
.karosel-oge{background:#fff;border-radius:10px;min-width:190px;height:118px;display:flex;align-items:center;justify-content:center;padding:18px 26px}
.karosel-oge img{max-height:78px;max-width:150px;width:auto;object-fit:contain}
@keyframes kaydir{from{transform:translateX(0)}to{transform:translateX(-50%)}}

/* İletişim + Teklif */
.iletisim-blok{padding:clamp(70px,9vw,130px) 0;border-top:1px solid var(--line)}
.iletisim-blok h2{font-size:clamp(44px,7vw,96px)}
.il-ust{display:flex;justify-content:space-between;gap:30px;flex-wrap:wrap;margin:28px 0 40px;align-items:flex-start}
.il-bilgi p{color:var(--muted);margin-bottom:6px}
.il-bilgi a{color:#fff}
.il-bilgi .tel{font-family:"Dorsa";font-size:clamp(30px,5vw,60px);color:#fff;margin-top:12px}
.harita iframe{width:100%;height:380px;border:0;border-radius:12px;filter:grayscale(.25) contrast(1.05)}
.teklif-form{display:grid;gap:14px;max-width:640px;margin-top:26px}
.teklif-form input,.teklif-form textarea{background:transparent;border:1px solid var(--line);color:#fff;padding:16px;font-family:"Oswald";font-size:15px;border-radius:8px}
.teklif-form input::placeholder,.teklif-form textarea::placeholder{color:#8a8a90}
.teklif-form button{justify-self:start;padding:15px 44px;background:#fff;color:#000;border:0;border-radius:8px;font-family:"Oswald";font-weight:500;letter-spacing:.15em;cursor:pointer;transition:.25s}
.teklif-form button:hover{opacity:.85}
.basari{color:#78e39b;margin-top:14px}

/* Yüzen sosyal */
.sosyal{position:fixed;right:16px;bottom:20px;z-index:60;display:flex;flex-direction:column;gap:10px}
.sosyal a{width:44px;height:44px;border-radius:50%;background:#fff;color:#000;display:flex;align-items:center;justify-content:center;font-family:"Oswald";font-weight:600;font-size:12px;box-shadow:0 4px 14px rgba(0,0,0,.45);transition:.2s}
.sosyal a:hover{transform:translateY(-3px)}

@media(max-width:900px){
  .il-ust{flex-direction:column}
  .harita iframe{height:280px}
  .sosyal a{width:38px;height:38px;font-size:11px}
}

.sosyal a svg{width:20px;height:20px;display:block}