/* ============================================================
   BİL-GÜL İNŞAAT — Kurumsal Web Sitesi
   Tasarım dili: lacivert / altın kimlik + teknik çizim (blueprint)
   ============================================================ */

:root{
  --ink:#0A1730;
  --navy:#10254A;
  --navy-2:#16305C;
  --gold:#C89A3C;
  --gold-soft:#E0BE72;
  --paper:#F4F2F0;
  --paper-2:#EBE8E4;
  --line:#D9D4CD;
  --line-dark:rgba(200,154,60,.28);
  --slate:#5E6879;
  --white:#fff;

  --f-display:"Archivo","Helvetica Neue",Arial,sans-serif;
  --f-body:"Inter","Helvetica Neue",Arial,sans-serif;
  --f-mono:"IBM Plex Mono",ui-monospace,monospace;

  --wrap:1240px;
  --pad:clamp(20px,5vw,64px);
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--paper);color:var(--ink);
  font-family:var(--f-body);font-size:16.5px;line-height:1.7;
  -webkit-font-smoothing:antialiased;overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}

h1,h2,h3,h4{font-family:var(--f-display);font-weight:800;letter-spacing:-.02em;line-height:1.04;margin:0}
p{margin:0 0 1em}

.wrap{max-width:var(--wrap);margin:0 auto;padding-inline:var(--pad)}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}

/* ---------- Teknik etiket (eyebrow) ---------- */
.eyebrow{
  font-family:var(--f-mono);font-size:11.5px;letter-spacing:.24em;
  text-transform:uppercase;color:var(--gold);margin:0 0 18px;
  display:flex;align-items:center;gap:12px;
}
.eyebrow::before{content:"";width:26px;height:1px;background:var(--gold);flex:none}
.on-dark .eyebrow{color:var(--gold-soft)}

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;background:rgba(244,242,240,.92);
  backdrop-filter:blur(10px);border-bottom:1px solid var(--line);
  transition:box-shadow .3s ease;
}
.site-header.scrolled{box-shadow:0 1px 24px rgba(10,23,48,.08)}
.header-in{display:flex;align-items:center;justify-content:space-between;gap:24px;
  padding-block:14px;max-width:var(--wrap);margin:0 auto;padding-inline:var(--pad)}
.logo img{height:44px;width:auto;mix-blend-mode:multiply}

.nav{display:flex;align-items:center;gap:6px}
.nav a{
  font-family:var(--f-mono);font-size:12px;letter-spacing:.14em;text-transform:uppercase;
  padding:10px 14px;color:var(--ink);position:relative;transition:color .2s;
}
.nav a::after{content:"";position:absolute;left:14px;right:14px;bottom:4px;height:1px;
  background:var(--gold);transform:scaleX(0);transform-origin:left;transition:transform .28s ease}
.nav a:hover::after,.nav a[aria-current="page"]::after{transform:scaleX(1)}
.nav a[aria-current="page"]{color:var(--gold)}

.nav-cta{
  background:var(--navy);color:#fff !important;padding:12px 20px;margin-left:10px;
}
.nav-cta::after{display:none}
.nav-cta:hover{background:var(--gold)}

.burger{display:none;background:none;border:1px solid var(--line);padding:10px;cursor:pointer}
.burger span{display:block;width:20px;height:1.5px;background:var(--ink);margin:4px 0;transition:.3s}
.burger[aria-expanded="true"] span:nth-child(1){transform:translateY(5.5px) rotate(45deg)}
.burger[aria-expanded="true"] span:nth-child(2){opacity:0}
.burger[aria-expanded="true"] span:nth-child(3){transform:translateY(-5.5px) rotate(-45deg)}

@media(max-width:960px){
  .burger{display:block}
  .nav{
    position:fixed;inset:69px 0 auto;background:var(--paper);flex-direction:column;
    align-items:stretch;gap:0;padding:12px var(--pad) 28px;border-bottom:1px solid var(--line);
    transform:translateY(-120%);transition:transform .35s cubic-bezier(.4,0,.2,1);
  }
  .nav.open{transform:translateY(0)}
  .nav a{padding:16px 0;border-bottom:1px solid var(--line);font-size:13px}
  .nav a::after{display:none}
  .nav-cta{margin:16px 0 0;text-align:center;border:none}
}

/* ---------- Butonlar ---------- */
.btn{
  display:inline-flex;align-items:center;gap:12px;font-family:var(--f-mono);
  font-size:12px;letter-spacing:.16em;text-transform:uppercase;
  padding:16px 26px;border:1px solid var(--ink);transition:.25s ease;
}
.btn .arw{transition:transform .25s ease}
.btn:hover .arw{transform:translateX(5px)}
.btn-gold{background:var(--gold);border-color:var(--gold);color:#fff}
.btn-gold:hover{background:var(--ink);border-color:var(--ink)}
.btn-ghost{border-color:rgba(255,255,255,.35);color:#fff}
.btn-ghost:hover{border-color:var(--gold);background:var(--gold)}
.btn-dark{background:var(--navy);border-color:var(--navy);color:#fff}
.btn-dark:hover{background:var(--gold);border-color:var(--gold)}

/* ---------- Blueprint zemin ---------- */
.on-dark{background:var(--ink);color:#DCE1EA;position:relative;overflow:hidden}
.on-dark h1,.on-dark h2,.on-dark h3{color:#fff}
.grid-bg::before{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.5;
  background-image:linear-gradient(rgba(200,154,60,.07) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(200,154,60,.07) 1px,transparent 1px);
  background-size:64px 64px;
  mask-image:radial-gradient(ellipse 80% 70% at 50% 40%,#000 30%,transparent 100%);
}

/* ---------- Hero ---------- */
.hero{position:relative;min-height:min(92vh,820px);display:flex;flex-direction:column;
  justify-content:flex-end;background:var(--ink);overflow:hidden}
.hero-img{position:absolute;inset:0}
.hero-img img{width:100%;height:100%;object-fit:cover;object-position:center 40%;
  filter:saturate(.85) contrast(1.02)}
.hero-img::after{content:"";position:absolute;inset:0;
  background:linear-gradient(105deg,rgba(10,23,48,.94) 0%,rgba(10,23,48,.84) 42%,rgba(10,23,48,.32) 100%)}
.hero-in{position:relative;z-index:2;width:100%;padding-block:clamp(48px,10vh,110px)}
.hero h1{
  font-size:clamp(2.6rem,6.6vw,5.4rem);color:#fff;max-width:16ch;letter-spacing:-.035em;
}
.hero h1 em{font-style:normal;color:var(--gold-soft)}
.hero-sub{color:#B9C2D0;max-width:52ch;margin-top:26px;font-size:1.05rem}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:38px}

.hero-meta{
  position:relative;z-index:2;border-top:1px solid rgba(255,255,255,.14);
  display:grid;grid-template-columns:repeat(4,1fr);
}
.hero-meta div{padding:24px 0;border-right:1px solid rgba(255,255,255,.14)}
.hero-meta div:last-child{border-right:none}
.hero-meta b{display:block;font-family:var(--f-display);font-size:clamp(1.5rem,2.6vw,2.2rem);
  color:#fff;font-weight:800;letter-spacing:-.02em}
.hero-meta span{font-family:var(--f-mono);font-size:10.5px;letter-spacing:.18em;
  text-transform:uppercase;color:#8B97A9}
@media(max-width:760px){
  .hero-meta{grid-template-columns:1fr 1fr}
  .hero-meta div{padding:18px 0}
  .hero-meta div:nth-child(2){border-right:none}
  .hero-meta div:nth-child(-n+2){border-bottom:1px solid rgba(255,255,255,.14)}
}

/* ---------- Bölüm ---------- */
.section{padding-block:clamp(64px,9vw,124px)}
.section-head{max-width:70ch;margin-bottom:clamp(36px,5vw,64px)}
.section-head h2{font-size:clamp(1.9rem,4vw,3.1rem)}
.section-head p{margin-top:20px;color:var(--slate);font-size:1.04rem;max-width:60ch}
.on-dark .section-head p{color:#96A2B4}

.lead{font-size:1.15rem;line-height:1.66}

/* ---------- Sayfa başlığı ---------- */
.page-hero{background:var(--ink);color:#fff;position:relative;overflow:hidden;
  padding-block:clamp(72px,11vw,140px) clamp(48px,7vw,86px)}
.page-hero h1{font-size:clamp(2.2rem,5.4vw,4.2rem);max-width:18ch}
.page-hero p{color:#9AA6B8;max-width:58ch;margin-top:22px}
.crumb{font-family:var(--f-mono);font-size:11px;letter-spacing:.2em;text-transform:uppercase;
  color:#6C7A90;margin-bottom:26px}
.crumb a:hover{color:var(--gold-soft)}

/* ---------- Sütunlar ---------- */
.cols{display:grid;gap:clamp(32px,4vw,72px)}
.cols-2{grid-template-columns:1fr 1fr}
.cols-3{grid-template-columns:repeat(3,1fr)}
@media(max-width:900px){.cols-2,.cols-3{grid-template-columns:1fr}}

/* ---------- Hizmet kartları ---------- */
.svc{border-top:1px solid var(--line);padding-top:26px;position:relative}
.svc .no{font-family:var(--f-mono);font-size:11px;letter-spacing:.18em;color:var(--gold)}
.svc h3{font-size:1.32rem;margin:14px 0 12px;letter-spacing:-.01em;line-height:1.22}
.svc p{color:var(--slate);font-size:.96rem;margin:0}
.svc::after{content:"";position:absolute;top:-1px;left:0;width:0;height:2px;background:var(--gold);
  transition:width .4s cubic-bezier(.4,0,.2,1)}
.svc:hover::after{width:100%}

/* ---------- Yetenek şeridi ---------- */
.caps{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);
  border:1px solid var(--line)}
.caps>div{background:var(--paper);padding:34px}
.caps h4{font-size:1.05rem;margin-bottom:10px}
.caps p{color:var(--slate);font-size:.93rem;margin:0}
@media(max-width:900px){.caps{grid-template-columns:1fr}}

/* ---------- Proje ızgarası ---------- */
.projects{display:grid;grid-template-columns:repeat(12,1fr);gap:clamp(16px,2vw,28px)}
.pcard{position:relative;overflow:hidden;background:var(--ink);display:block}
.pcard.w6{grid-column:span 6}
.pcard.w4{grid-column:span 4}
.pcard.w8{grid-column:span 8}
.pcard.w12{grid-column:span 12}
@media(max-width:900px){.pcard{grid-column:span 12 !important}}

.pcard .ph{aspect-ratio:16/10;overflow:hidden}
.pcard.tall .ph{aspect-ratio:4/5}
.pcard img{width:100%;height:100%;object-fit:cover;transition:transform .8s cubic-bezier(.2,.7,.2,1)}
.pcard:hover img{transform:scale(1.05)}
.pcard .veil{position:absolute;inset:0;
  background:linear-gradient(to top,rgba(10,23,48,.93) 0%,rgba(10,23,48,.55) 34%,rgba(10,23,48,0) 68%)}
.pcard .body{position:absolute;left:0;right:0;bottom:0;padding:clamp(20px,2.4vw,32px);color:#fff}
.pcard .code{font-family:var(--f-mono);font-size:10.5px;letter-spacing:.2em;color:var(--gold-soft)}
.pcard h3{font-size:clamp(1.15rem,1.7vw,1.6rem);margin:10px 0 8px;line-height:1.16}
.pcard .loc{font-family:var(--f-mono);font-size:11px;letter-spacing:.1em;color:#A9B4C4}
.pcard .val{margin-top:14px;padding-top:14px;border-top:1px solid rgba(255,255,255,.18);
  display:flex;justify-content:space-between;align-items:baseline;gap:12px;
  font-family:var(--f-mono);font-size:11.5px;letter-spacing:.08em;color:#C6CEDA}
.pcard .val b{font-family:var(--f-display);font-size:1.1rem;color:var(--gold-soft);letter-spacing:0}

/* ---------- Proje detay bloğu ---------- */
.pdetail{border-top:1px solid var(--line);padding-block:clamp(48px,6vw,84px)}
.pdetail:first-of-type{border-top:none}
.pdetail-grid{display:grid;grid-template-columns:1fr 1.25fr;gap:clamp(28px,4vw,64px);align-items:start}
@media(max-width:900px){.pdetail-grid{grid-template-columns:1fr}}
.pdetail h2{font-size:clamp(1.7rem,3.2vw,2.6rem);margin-bottom:16px}
.pdetail .loc{font-family:var(--f-mono);font-size:11.5px;letter-spacing:.16em;
  text-transform:uppercase;color:var(--gold);margin-bottom:20px}
.pdetail p{color:var(--slate)}
.specs{list-style:none;margin:26px 0 0;padding:0;border-top:1px solid var(--line)}
.specs li{display:flex;justify-content:space-between;gap:20px;padding:13px 0;
  border-bottom:1px solid var(--line);font-size:.93rem}
.specs dt,.specs .k{font-family:var(--f-mono);font-size:11px;letter-spacing:.14em;
  text-transform:uppercase;color:var(--slate)}
.specs .v{text-align:right;font-weight:600}
.shots{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.shots .big{grid-column:span 2}
.shots img{width:100%;height:100%;object-fit:cover;aspect-ratio:16/10}
.shots .big img{aspect-ratio:16/9}

/* ---------- İstatistik ---------- */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:rgba(255,255,255,.12);
  border:1px solid rgba(255,255,255,.12)}
.stats>div{background:var(--ink);padding:34px 28px}
.stats b{display:block;font-family:var(--f-display);font-weight:800;
  font-size:clamp(2rem,3.6vw,3rem);color:var(--gold-soft);letter-spacing:-.03em}
.stats span{font-family:var(--f-mono);font-size:10.5px;letter-spacing:.18em;
  text-transform:uppercase;color:#8B97A9;display:block;margin-top:10px}
@media(max-width:820px){.stats{grid-template-columns:1fr 1fr}}

/* ---------- Zaman çizelgesi ---------- */
.timeline{list-style:none;margin:0;padding:0;position:relative}
.timeline::before{content:"";position:absolute;left:0;top:6px;bottom:6px;width:1px;background:var(--line)}
.timeline li{position:relative;padding:0 0 40px 34px}
.timeline li:last-child{padding-bottom:0}
.timeline li::before{content:"";position:absolute;left:-4px;top:8px;width:9px;height:9px;
  background:var(--gold);border-radius:50%}
.timeline .yr{font-family:var(--f-display);font-weight:800;font-size:1.5rem;letter-spacing:-.02em}
.timeline p{margin:8px 0 0;color:var(--slate);font-size:.96rem;max-width:52ch}

/* ---------- QHSE ---------- */
.qhse{display:grid;grid-template-columns:repeat(3,1fr);gap:clamp(24px,3vw,48px)}
@media(max-width:900px){.qhse{grid-template-columns:1fr}}
.qhse article{border-left:2px solid var(--gold);padding-left:24px}
.qhse h3{font-size:1.2rem;margin-bottom:12px}
.qhse ul{margin:14px 0 0;padding-left:0;list-style:none}
.qhse li{font-size:.92rem;color:#96A2B4;padding:7px 0 7px 20px;position:relative}
.qhse li::before{content:"";position:absolute;left:0;top:16px;width:8px;height:1px;background:var(--gold)}

/* ---------- CTA şeridi ---------- */
.cta-band{background:var(--navy);color:#fff;position:relative;overflow:hidden}
.cta-band .wrap{padding-block:clamp(56px,7vw,92px);display:flex;flex-wrap:wrap;gap:32px;
  align-items:center;justify-content:space-between;position:relative;z-index:2}
.cta-band h2{font-size:clamp(1.6rem,3.2vw,2.6rem);max-width:20ch}
.cta-band p{color:#A9B6C8;margin:14px 0 0;max-width:44ch}

/* ---------- İletişim ---------- */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:clamp(32px,4vw,72px)}
@media(max-width:900px){.contact-grid{grid-template-columns:1fr}}
.field{margin-bottom:20px}
.field label{display:block;font-family:var(--f-mono);font-size:11px;letter-spacing:.16em;
  text-transform:uppercase;color:var(--slate);margin-bottom:8px}
.field input,.field textarea,.field select{
  width:100%;padding:14px 16px;border:1px solid var(--line);background:#fff;
  font-family:var(--f-body);font-size:.98rem;color:var(--ink);border-radius:0}
.field input:focus,.field textarea:focus,.field select:focus{outline:2px solid var(--gold);outline-offset:-2px;border-color:var(--gold)}
.field textarea{min-height:140px;resize:vertical}
.info-list{list-style:none;margin:0;padding:0}
.info-list li{border-top:1px solid var(--line);padding:20px 0}
.info-list .k{font-family:var(--f-mono);font-size:11px;letter-spacing:.16em;
  text-transform:uppercase;color:var(--gold);display:block;margin-bottom:6px}
.info-list .v{font-size:1.08rem;font-weight:600}
.form-note{font-size:.86rem;color:var(--slate);margin-top:14px}

/* ---------- Footer ---------- */
.site-footer{background:var(--ink);color:#93A0B2;padding-block:clamp(56px,7vw,88px) 0}
.footer-top{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px}
@media(max-width:900px){.footer-top{grid-template-columns:1fr 1fr}}
@media(max-width:560px){.footer-top{grid-template-columns:1fr}}
.footer-top img{height:88px;width:auto;margin-bottom:20px}
.site-footer h4{font-family:var(--f-mono);font-size:11px;letter-spacing:.2em;text-transform:uppercase;
  color:var(--gold);font-weight:400;margin-bottom:18px}
.site-footer ul{list-style:none;margin:0;padding:0}
.site-footer li{padding:6px 0;font-size:.94rem}
.site-footer a:hover{color:var(--gold-soft)}
.footer-tag{font-family:var(--f-display);font-weight:800;color:#fff;font-size:1.05rem;
  letter-spacing:-.01em;line-height:1.3}
.footer-bottom{margin-top:56px;border-top:1px solid rgba(255,255,255,.12);padding-block:26px;
  display:flex;flex-wrap:wrap;gap:14px;justify-content:space-between;
  font-family:var(--f-mono);font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:#65728A}

/* ---------- Görünürlük animasyonu ---------- */
.rv{opacity:0;transform:translateY(22px)}
.rv.in{opacity:1;transform:none;transition:opacity .7s ease,transform .7s cubic-bezier(.2,.7,.2,1)}
@media(prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important}
  html{scroll-behavior:auto}
  .rv{opacity:1;transform:none}
}
:focus-visible{outline:2px solid var(--gold);outline-offset:3px}