/* =====================================================================
   DEDEOĞLU MÜHENDİSLİK — Ana Stil Dosyası
   Modern, aydınlık, kurumsal mühendislik kimliği.
   ===================================================================== */

:root{
  --c-bg:        #FFFFFF;   /* sayfa arka planı */
  --c-surface:   #F6F8FA;   /* alternatif (açık gri) bölüm arka planı */
  --c-surface-2: #E4E8ED;   /* kenarlıklar / ayraçlar */
  --c-ink:       #101828;   /* başlıklar, güçlü metin (lacivert-siyah) */
  --c-text:      #3C4656;   /* gövde metni */
  --c-silver:    #6B7686;   /* ikincil / soluk metin */
  --c-gold:      #B8860B;   /* ana vurgu (metin/ikon için kontrast güvenli amber) */
  --c-gold-2:    #F5B800;   /* parlak altın - gradyanlar */
  --c-gold-3:    #FFC928;   /* en parlak altın - gradyan vurgusu */
  --c-navy:      #0B1220;   /* derin lacivert (footer/kontrast bölgeleri) */
  --c-white:     #FFFFFF;

  --shadow-sm: 0 1px 2px rgba(16,24,40,.06), 0 1px 3px rgba(16,24,40,.04);
  --shadow-md: 0 8px 20px rgba(16,24,40,.08);
  --shadow-lg: 0 24px 48px rgba(16,24,40,.12);

  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;

  --container: 1240px;
  --header-h: 84px;

  --ease: cubic-bezier(.4,0,.2,1);
  --font: 'Inter', 'Segoe UI', Arial, sans-serif;
}

/* ---------- Reset ---------- */
*,*::before,*::after{ box-sizing:border-box; }
html{ scroll-behavior:smooth; }
body{
  margin:0;
  background:var(--c-bg);
  color:var(--c-text);
  font-family:var(--font);
  font-size:16px;
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{ max-width:100%; display:block; }
a{ color:inherit; text-decoration:none; }
ul{ margin:0; padding:0; list-style:none; }
h1,h2,h3,h4,p{ margin:0; }
button{ font-family:inherit; }

@media (prefers-reduced-motion: reduce){
  *, *::before, *::after{ animation-duration:.01ms !important; animation-iteration-count:1 !important; transition-duration:.01ms !important; scroll-behavior:auto !important; }
}

.container{ max-width:var(--container); margin:0 auto; padding:0 24px; }
.section{ padding:90px 0; position:relative; }
.section-sm{ padding:60px 0; }

.eyebrow{
  display:inline-flex; align-items:center; gap:8px;
  color:var(--c-gold); font-size:13px; font-weight:700;
  letter-spacing:2px; text-transform:uppercase; margin-bottom:14px;
}
.eyebrow::before{ content:""; width:22px; height:2px; background:var(--c-gold); }

.section-title{
  font-size:clamp(26px,3.2vw,40px);
  font-weight:800; color:var(--c-ink);
  letter-spacing:.2px; margin-bottom:16px;
}
.section-desc{ color:var(--c-silver); max-width:640px; font-size:15.5px; }
.section-head{ margin-bottom:46px; }
.section-head.center{ text-align:center; margin-left:auto; margin-right:auto; }
.section-head.center .section-desc{ margin-left:auto; margin-right:auto; }

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:10px;
  padding:14px 28px; border-radius:var(--radius-sm); font-weight:700; font-size:14.5px;
  letter-spacing:.3px; border:1px solid transparent; cursor:pointer;
  transition:transform .2s var(--ease), box-shadow .2s var(--ease), background .2s var(--ease), border-color .2s var(--ease), color .2s var(--ease);
  white-space:nowrap;
}
.btn-primary{ background:linear-gradient(135deg,var(--c-gold-2),var(--c-gold-3)); color:#1A1300; box-shadow:var(--shadow-sm); }
.btn-primary:hover{ transform:translateY(-2px); box-shadow:0 14px 28px rgba(184,134,11,.28); }
.btn-outline{ background:var(--c-white); color:var(--c-ink); border-color:var(--c-surface-2); box-shadow:var(--shadow-sm); }
.btn-outline:hover{ border-color:var(--c-gold); color:var(--c-gold); }
.btn-block{ width:100%; }
.btn-sm{ padding:10px 18px; font-size:13px; }

/* ---------- Header ---------- */
.site-header{
  position:fixed; top:0; left:0; right:0; z-index:1000;
  height:var(--header-h); display:flex; align-items:center;
  background:rgba(255,255,255,.75); backdrop-filter:blur(10px);
  border-bottom:1px solid transparent;
  transition:background .3s var(--ease), border-color .3s var(--ease), box-shadow .3s var(--ease);
}
.site-header.is-scrolled{ background:rgba(255,255,255,.96); border-color:var(--c-surface-2); box-shadow:var(--shadow-sm); }
.site-header .container{ display:flex; align-items:center; justify-content:space-between; gap:24px; }
.brand{ display:flex; align-items:center; gap:12px; }
.brand img{ height:42px; width:auto; }

.main-nav{ display:flex; align-items:center; gap:34px; }
.main-nav a{
  font-size:14px; font-weight:600; color:var(--c-text); position:relative; padding:6px 0;
  transition:color .2s var(--ease);
}
.main-nav a::after{
  content:""; position:absolute; left:0; bottom:0; width:0; height:2px; background:var(--c-gold-2);
  transition:width .25s var(--ease);
}
.main-nav a:hover{ color:var(--c-ink); }
.main-nav a:hover::after, .main-nav a.active::after{ width:100%; }
.main-nav a.active{ color:var(--c-gold); }

.header-actions{ display:flex; align-items:center; gap:16px; }
.phone-chip{ display:flex; align-items:center; gap:8px; font-size:14px; font-weight:700; color:var(--c-ink); }
.phone-chip svg{ color:var(--c-gold); }

.nav-toggle{
  display:none; width:42px; height:42px; border-radius:var(--radius-sm); border:1px solid var(--c-surface-2);
  background:var(--c-white); color:var(--c-ink); align-items:center; justify-content:center; cursor:pointer;
}

.mobile-nav{
  position:fixed; inset:var(--header-h) 0 0 0; background:var(--c-white); z-index:999;
  transform:translateX(100%); transition:transform .3s var(--ease); overflow-y:auto;
  padding:30px 24px; box-shadow:var(--shadow-lg);
}
.mobile-nav.open{ transform:translateX(0); }
.mobile-nav a{ display:block; padding:16px 0; font-size:18px; font-weight:700; color:var(--c-ink); border-bottom:1px solid var(--c-surface-2); }
.mobile-nav .phone-chip{ margin-top:24px; font-size:17px; }

/* ---------- Hero ---------- */
.hero{
  position:relative; min-height:92vh; display:flex; align-items:center;
  padding-top:var(--header-h);
  background:
    radial-gradient(ellipse 900px 600px at 82% 18%, rgba(245,184,0,.10), transparent 60%),
    radial-gradient(ellipse 700px 500px at 10% 90%, rgba(184,134,11,.06), transparent 55%),
    linear-gradient(180deg, #FFFFFF 0%, #F8F9FB 100%);
  overflow:hidden;
}
.hero::before{
  content:""; position:absolute; inset:0; opacity:.6; pointer-events:none;
  background-image:
    linear-gradient(rgba(16,24,40,.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(16,24,40,.045) 1px, transparent 1px);
  background-size:42px 42px;
  mask-image: radial-gradient(ellipse at 65% 35%, black 0%, transparent 70%);
}
.hero-bolt{
  position:absolute; right:6%; top:14%; width:240px; pointer-events:none;
}
.hero-content{ position:relative; z-index:2; max-width:720px; }
.hero-title{
  font-size:clamp(40px,6vw,72px); font-weight:800; color:var(--c-ink);
  line-height:1.07; letter-spacing:.2px; margin-bottom:22px;
}
.hero-title span{ color:var(--c-gold); display:block; }
.hero-sub{ font-size:18px; color:var(--c-silver); max-width:560px; margin-bottom:38px; }
.hero-actions{ display:flex; gap:16px; flex-wrap:wrap; }
.hero-scroll{
  position:absolute; bottom:34px; left:50%; transform:translateX(-50%);
  color:var(--c-silver); font-size:12px; letter-spacing:2px; text-transform:uppercase;
  display:flex; flex-direction:column; align-items:center; gap:10px;
}
.hero-scroll .line{ width:1px; height:36px; background:linear-gradient(var(--c-gold-2), transparent); animation:scrollPulse 2s infinite; }
@keyframes scrollPulse{ 0%,100%{opacity:.25;} 50%{opacity:1;} }

/* ---------- Stats ---------- */
.stats-bar{
  background:linear-gradient(135deg,#FFFBF0,#FDF3D9);
  border-top:1px solid var(--c-surface-2); border-bottom:1px solid var(--c-surface-2);
  padding:50px 0;
}
.stats-grid{ display:grid; grid-template-columns:repeat(4,1fr); gap:30px; text-align:center; }
.stat-num{ font-size:clamp(30px,4vw,46px); font-weight:800; color:var(--c-ink); }
.stat-num span{ color:var(--c-gold); }
.stat-label{ margin-top:8px; color:var(--c-silver); font-size:13.5px; text-transform:uppercase; letter-spacing:1px; }

/* ---------- Services ---------- */
.services-grid{ display:grid; grid-template-columns:repeat(4,1fr); gap:24px; }
.service-card{
  background:var(--c-white); border:1px solid var(--c-surface-2); border-radius:var(--radius-md);
  padding:32px 26px; box-shadow:var(--shadow-sm);
  transition:border-color .25s var(--ease), transform .25s var(--ease), box-shadow .25s var(--ease);
}
.service-card:hover{ border-color:rgba(184,134,11,.35); transform:translateY(-4px); box-shadow:var(--shadow-md); }
.service-icon{
  width:52px; height:52px; border-radius:var(--radius-sm); background:linear-gradient(135deg,#FFF6DF,#FDECC0);
  display:flex; align-items:center; justify-content:center; color:var(--c-gold); margin-bottom:20px; font-size:22px;
}
.service-card h3{ font-size:17px; color:var(--c-ink); font-weight:700; margin-bottom:10px; }
.service-card p{ color:var(--c-silver); font-size:14px; }
.service-link{ display:inline-flex; gap:6px; margin-top:16px; font-size:13px; font-weight:700; color:var(--c-gold); align-items:center; }

/* ---------- About ---------- */
.about-grid{ display:grid; grid-template-columns:1fr 1fr; gap:64px; align-items:center; }
.about-media{ position:relative; border-radius:var(--radius-lg); overflow:hidden; aspect-ratio:4/5; background:var(--c-surface); box-shadow:var(--shadow-md); }
.about-media img{ width:100%; height:100%; object-fit:cover; }
.about-media::after{ content:""; position:absolute; inset:0; border:1px solid rgba(184,134,11,.2); border-radius:var(--radius-lg); pointer-events:none; }
.about-list{ margin-top:26px; display:grid; gap:14px; }
.about-list li{ display:flex; gap:12px; align-items:flex-start; color:var(--c-text); font-size:14.5px; }
.about-list li svg{ color:var(--c-gold); flex-shrink:0; margin-top:3px; }

/* ---------- Why us / process ---------- */
.why-grid{ display:grid; grid-template-columns:repeat(4,1fr); gap:24px; }
.why-card{ text-align:center; padding:10px; }
.why-num{ font-size:40px; font-weight:800; -webkit-text-stroke:1.5px var(--c-gold-2); color:transparent; margin-bottom:14px; }
.why-card h3{ color:var(--c-ink); font-size:16px; margin-bottom:8px; }
.why-card p{ color:var(--c-silver); font-size:13.5px; }

.process-grid{ display:grid; grid-template-columns:repeat(4,1fr); gap:0; position:relative; }
.process-step{ position:relative; padding:0 20px; text-align:center; }
.process-step .num{
  width:54px; height:54px; border-radius:50%; margin:0 auto 18px; display:flex; align-items:center; justify-content:center;
  background:var(--c-white); border:1px solid var(--c-gold-2); color:var(--c-gold); font-weight:800; box-shadow:var(--shadow-sm);
}
.process-step h4{ color:var(--c-ink); font-size:15px; margin-bottom:8px; }
.process-step p{ color:var(--c-silver); font-size:13.5px; }
.process-step:not(:last-child)::after{
  content:""; position:absolute; top:27px; left:100%; width:100%; height:1px;
  background:repeating-linear-gradient(90deg, var(--c-surface-2) 0 6px, transparent 6px 12px);
}

/* ---------- Project / Blog / Gallery cards ---------- */
.tabs{ display:flex; gap:10px; margin-bottom:34px; flex-wrap:wrap; }
.tab-link{
  padding:10px 20px; border-radius:30px; border:1px solid var(--c-surface-2); color:var(--c-silver); background:var(--c-white);
  font-size:13.5px; font-weight:600; transition:all .2s var(--ease);
}
.tab-link:hover{ border-color:var(--c-gold-2); color:var(--c-ink); }
.tab-link.active{ background:var(--c-gold-2); color:#1A1300; border-color:var(--c-gold-2); }

.card-grid{ display:grid; grid-template-columns:repeat(3,1fr); gap:28px; }
.project-card, .blog-card{
  background:var(--c-white); border:1px solid var(--c-surface-2); border-radius:var(--radius-md); overflow:hidden;
  box-shadow:var(--shadow-sm);
  transition:transform .25s var(--ease), border-color .25s var(--ease), box-shadow .25s var(--ease);
}
.project-card:hover, .blog-card:hover{ transform:translateY(-5px); border-color:rgba(184,134,11,.3); box-shadow:var(--shadow-md); }
.card-media{ position:relative; aspect-ratio:4/3; overflow:hidden; background:var(--c-surface); }
.card-media img{ width:100%; height:100%; object-fit:cover; transition:transform .5s var(--ease); }
.project-card:hover .card-media img, .blog-card:hover .card-media img{ transform:scale(1.06); }
.badge{
  position:absolute; top:14px; left:14px; padding:6px 12px; border-radius:30px; font-size:11px; font-weight:700;
  text-transform:uppercase; letter-spacing:.5px;
}
.badge-ongoing{ background:#FFF6DF; color:#8A6400; border:1px solid #F0D385; }
.badge-completed{ background:#E7F8EE; color:#1E8A4C; border:1px solid #AEE4C3; }
.card-body{ padding:22px; }
.card-body .meta{ font-size:12px; color:var(--c-gold); text-transform:uppercase; letter-spacing:1px; margin-bottom:8px; }
.card-body h3{ font-size:17px; color:var(--c-ink); font-weight:700; margin-bottom:10px; line-height:1.4; }
.card-body p{ color:var(--c-silver); font-size:14px; }
.card-foot{ display:flex; justify-content:space-between; align-items:center; margin-top:16px; padding-top:16px; border-top:1px solid var(--c-surface-2); font-size:12.5px; color:var(--c-silver); }

/* ---------- Gallery ---------- */
.gallery-filters{ display:flex; gap:10px; margin-bottom:30px; flex-wrap:wrap; }
.masonry{ column-count:3; column-gap:18px; }
.masonry-item{ margin-bottom:18px; border-radius:var(--radius-md); overflow:hidden; break-inside:avoid; position:relative; cursor:pointer; background:var(--c-surface); box-shadow:var(--shadow-sm); }
.masonry-item img{ width:100%; display:block; transition:transform .4s var(--ease); }
.masonry-item:hover img{ transform:scale(1.05); }
.masonry-item .cap{ position:absolute; left:0; right:0; bottom:0; padding:14px; background:linear-gradient(0deg, rgba(0,0,0,.72), transparent); font-size:13px; font-weight:600; color:var(--c-white); opacity:0; transition:opacity .25s var(--ease); }
.masonry-item:hover .cap{ opacity:1; }

.lightbox{ position:fixed; inset:0; background:rgba(10,12,16,.92); z-index:2000; display:none; align-items:center; justify-content:center; padding:30px; }
.lightbox.open{ display:flex; }
.lightbox img{ max-width:92vw; max-height:86vh; border-radius:var(--radius-sm); box-shadow:var(--shadow-lg); }
.lightbox-close, .lightbox-nav{ position:absolute; background:rgba(255,255,255,.12); border:1px solid rgba(255,255,255,.25); color:#fff; width:46px; height:46px; border-radius:50%; display:flex; align-items:center; justify-content:center; cursor:pointer; }
.lightbox-close{ top:24px; right:24px; }
.lightbox-prev{ left:24px; top:50%; transform:translateY(-50%); }
.lightbox-next{ right:24px; top:50%; transform:translateY(-50%); }

/* ---------- Contact ---------- */
.contact-grid{ display:grid; grid-template-columns:1.1fr 1fr; gap:50px; align-items:start; }
.contact-info-card{ background:var(--c-white); border:1px solid var(--c-surface-2); border-radius:var(--radius-md); padding:30px; box-shadow:var(--shadow-sm); }
.contact-info-card + .contact-info-card{ margin-top:18px; }
.info-row{ display:flex; gap:14px; align-items:flex-start; margin-bottom:18px; }
.info-row:last-child{ margin-bottom:0; }
.info-row .ic{ width:40px; height:40px; border-radius:var(--radius-sm); background:linear-gradient(135deg,#FFF6DF,#FDECC0); display:flex; align-items:center; justify-content:center; color:var(--c-gold); flex-shrink:0; }
.info-row h4{ font-size:14px; color:var(--c-ink); margin-bottom:4px; }
.info-row p, .info-row a{ font-size:13.5px; color:var(--c-silver); }

.form-card{ background:var(--c-white); border:1px solid var(--c-surface-2); border-radius:var(--radius-md); padding:36px; box-shadow:var(--shadow-sm); }
.form-group{ margin-bottom:18px; }
.form-group label{ display:block; font-size:13px; color:var(--c-silver); margin-bottom:7px; font-weight:600; }
.form-control{
  width:100%; padding:13px 15px; background:var(--c-white); border:1px solid var(--c-surface-2); border-radius:var(--radius-sm);
  color:var(--c-ink); font-size:14px; font-family:inherit; outline:none; transition:border-color .2s var(--ease), box-shadow .2s var(--ease);
}
.form-control:focus{ border-color:var(--c-gold-2); box-shadow:0 0 0 3px rgba(245,184,0,.15); }
textarea.form-control{ min-height:130px; resize:vertical; }
.form-row{ display:grid; grid-template-columns:1fr 1fr; gap:16px; }
.hp-field{ position:absolute; left:-9999px; top:-9999px; opacity:0; }
.alert-box{ padding:14px 18px; border-radius:var(--radius-sm); font-size:14px; margin-bottom:20px; }
.alert-success{ background:#E7F8EE; border:1px solid #AEE4C3; color:#1E8A4C; }
.alert-error{ background:#FDECEC; border:1px solid #F3B4B4; color:#C23030; }

/* ---------- Floating WhatsApp / CTA ---------- */
.float-actions{ position:fixed; bottom:24px; right:24px; z-index:900; display:flex; flex-direction:column; gap:12px; align-items:flex-end; }
.float-btn{
  display:flex; align-items:center; gap:10px; background:#25D366; color:#fff; padding:14px 20px; border-radius:50px;
  font-weight:700; font-size:13.5px; box-shadow:var(--shadow-md); transition:transform .2s var(--ease);
}
.float-btn:hover{ transform:translateY(-3px); }
.float-btn.quote{ background:linear-gradient(135deg,var(--c-gold-2),var(--c-gold-3)); color:#1A1300; }

/* ---------- Footer ---------- */
.site-footer{ background:var(--c-surface); border-top:1px solid var(--c-surface-2); padding:70px 0 0; }
.footer-grid{ display:grid; grid-template-columns:2fr 1fr 1fr 1.3fr; gap:40px; padding-bottom:50px; }
.footer-brand img{ height:40px; margin-bottom:18px; }
.footer-brand p{ color:var(--c-silver); font-size:13.5px; max-width:300px; }
.footer-col h4{ color:var(--c-ink); font-size:14px; margin-bottom:18px; text-transform:uppercase; letter-spacing:1px; }
.footer-col ul li{ margin-bottom:11px; }
.footer-col a{ color:var(--c-silver); font-size:13.5px; transition:color .2s var(--ease); }
.footer-col a:hover{ color:var(--c-gold); }
.social-row{ display:flex; gap:10px; margin-top:18px; }
.social-row a{ width:36px; height:36px; border-radius:50%; border:1px solid var(--c-surface-2); background:var(--c-white); display:flex; align-items:center; justify-content:center; color:var(--c-silver); }
.social-row a:hover{ border-color:var(--c-gold-2); color:var(--c-gold); }
.footer-bottom{ border-top:1px solid var(--c-surface-2); padding:22px 0; display:flex; justify-content:space-between; font-size:12.5px; color:var(--c-silver); flex-wrap:wrap; gap:10px; }
.footer-bottom .credit-link{ color:var(--c-silver); font-weight:700; transition:color .2s var(--ease); }
.footer-bottom .credit-link:hover{ color:var(--c-gold); }

/* ---------- Reveal animation ---------- */
.reveal{ opacity:0; transform:translateY(24px); transition:opacity .7s var(--ease), transform .7s var(--ease); }
.reveal.in{ opacity:1; transform:none; }

/* ---------- 404/500 ---------- */
.state-page{ min-height:100vh; display:flex; align-items:center; justify-content:center; text-align:center; padding:40px 24px; background:var(--c-surface); }
.state-code{ font-size:clamp(80px,14vw,160px); font-weight:800; -webkit-text-stroke:2px var(--c-gold-2); color:transparent; line-height:1; }
.state-page h1{ color:var(--c-ink); font-size:26px; margin:20px 0 12px; }
.state-page p{ color:var(--c-silver); margin-bottom:28px; }
.state-actions{ display:flex; gap:14px; justify-content:center; flex-wrap:wrap; }

/* =====================================================================
   Responsive
   ===================================================================== */
@media (max-width:1024px){
  .about-grid{ grid-template-columns:1fr; }
  .services-grid, .why-grid, .process-grid{ grid-template-columns:repeat(2,1fr); gap:30px 24px; }
  .process-step::after{ display:none; }
  .card-grid{ grid-template-columns:repeat(2,1fr); }
  .footer-grid{ grid-template-columns:1fr 1fr; }
  .masonry{ column-count:2; }
}
@media (max-width:860px){
  .main-nav, .header-actions .phone-chip{ display:none; }
  .nav-toggle{ display:flex; }
  .contact-grid{ grid-template-columns:1fr; }
  .form-row{ grid-template-columns:1fr; }
}
@media (max-width:640px){
  .stats-grid{ grid-template-columns:repeat(2,1fr); gap:28px; }
  .services-grid, .why-grid, .process-grid, .card-grid{ grid-template-columns:1fr; }
  .section{ padding:64px 0; }
  .masonry{ column-count:1; }
  .footer-grid{ grid-template-columns:1fr; gap:34px; }
  .hero-title{ font-size:clamp(34px,10vw,48px); }
  .float-actions{ right:16px; bottom:16px; }
  .float-btn{ padding:12px 16px; font-size:12.5px; }
}