/* Gölköy Doğrama — site.css
   Orijinal tek-sayfalık sitenin renk/marka kimliği korunarak çoklu sayfa +
   mobil menü + yeni bölümler (Malzemeler, Hakkımızda, detay sayfaları) için
   genişletildi. */

:root{
  --navy:#063b60; --blue:#087fb4; --turq:#19b8d0; --ice:#eefbfc;
  --text:#123451; --muted:#4d6779; --line:#d8edf2;
  --header-h:76px;
}
@media (max-width:560px){
  :root{ --header-h:64px }
}

*{box-sizing:border-box}
html{scroll-behavior:smooth; scroll-padding-top:calc(var(--header-h) + 12px)}
@media (prefers-reduced-motion:reduce){ html{scroll-behavior:auto} }
body{margin:0;font-family:Arial,Helvetica,sans-serif;color:var(--text);background:#fff}
a{text-decoration:none;color:inherit}
img{max-width:100%;display:block}
.container{width:min(1180px,92%);margin:auto}

:focus-visible{outline:3px solid var(--turq);outline-offset:2px}

/* ---------------------------------------------------------------- header */
header{position:sticky;top:0;z-index:30;background:rgba(255,255,255,.96);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.nav{height:var(--header-h);display:flex;align-items:center;justify-content:space-between;gap:16px}
.brand{display:flex;align-items:center;gap:12px;font-weight:900;letter-spacing:1.5px;color:var(--navy)}
.brand .mark{width:43px;height:43px;border-radius:12px;background:linear-gradient(135deg,var(--turq),var(--blue));display:grid;place-items:center;color:#fff;flex-shrink:0}
.brand .mark svg{width:24px;height:24px}
.brand small{display:block;font-size:10px;letter-spacing:3px;color:var(--blue);margin-top:2px}

.navlinks{display:flex;gap:25px;font-size:14px;font-weight:700}
.navlinks a{padding:6px 2px;border-bottom:2px solid transparent}
.navlinks a:hover,.navlinks a[aria-current="page"]{color:var(--turq);border-bottom-color:var(--turq)}

.social-icons{display:flex;gap:10px;align-items:center}
.social-icons a{width:34px;height:34px;border-radius:50%;display:grid;place-items:center;background:var(--ice);color:var(--navy)}
.social-icons a:hover{background:var(--turq);color:#fff}
.social-icons svg{width:16px;height:16px}

.actions{display:flex;gap:8px;align-items:center}
.cta,.outline{display:inline-flex;align-items:center;gap:8px;padding:12px 17px;border-radius:30px;font-weight:800;min-height:44px}
.cta{background:linear-gradient(135deg,var(--turq),var(--blue));color:#fff;box-shadow:0 8px 24px #087fb42b;border:1px solid transparent}
.outline{border:1px solid var(--turq);color:var(--navy)}

.navtoggle{display:none;width:44px;height:44px;border-radius:10px;border:1px solid var(--line);background:#fff;align-items:center;justify-content:center;flex-direction:column;gap:5px;flex-shrink:0}
.navtoggle span{display:block;width:20px;height:2px;background:var(--navy);transition:transform .18s ease,opacity .18s ease}
.navtoggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.navtoggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.navtoggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

.mobilnav{position:fixed;top:var(--header-h);left:0;right:0;background:#fff;border-bottom:1px solid var(--line);
  box-shadow:0 18px 40px #0b6b8522;max-height:calc(100dvh - var(--header-h));overflow-y:auto;
  -webkit-overflow-scrolling:touch;transform:translateY(-8px);opacity:0;pointer-events:none;
  transition:transform .18s ease,opacity .18s ease;z-index:25}
.mobilnav.is-open{transform:none;opacity:1;pointer-events:auto}
@media (prefers-reduced-motion:reduce){ .mobilnav{transition:none} }
.mobilnav a{display:block;padding:16px 24px;font-size:16px;font-weight:700;border-bottom:1px solid var(--line);min-height:44px}
.mobilnav .mobilnav-section-title{padding:14px 24px 4px;font-size:11px;letter-spacing:2px;color:var(--muted);font-weight:900}
.mobilnav .mobilnav-phones a{font-weight:600;font-size:15px}
.mobilnav .mobilnav-social{display:flex;gap:10px;padding:14px 24px 22px}
body.nav-open{overflow:hidden}

/* -------------------------------------------------------------- page hero */
.hero{min-height:650px;display:grid;grid-template-columns:42% 58%;background:linear-gradient(135deg,#eafaff,#fff)}
.hero-copy{padding:85px 35px 70px 0;display:flex;justify-content:center;flex-direction:column}
.eyebrow{color:var(--blue);font-weight:900;letter-spacing:3px;font-size:12px}
.hero h1{font-size:clamp(42px,5.2vw,70px);line-height:1.02;margin:15px 0;color:var(--navy)}
.hero p{font-size:18px;line-height:1.7;color:var(--muted);max-width:530px}
.buttons{display:flex;gap:12px;flex-wrap:wrap;margin-top:15px}
.btn2{padding:14px 20px;border-radius:30px;border:1px solid var(--turq);font-weight:800;min-height:44px;display:inline-flex;align-items:center}
.btn2.primary{background:var(--turq);color:#fff}
.hero-img{min-height:650px;background-size:cover;background-position:center;position:relative}
.hero-img .caption{position:absolute;right:25px;bottom:25px;color:#fff;font-size:24px;font-style:italic;text-shadow:0 2px 10px #0008}

.page-hero{padding:70px 0 40px;background:linear-gradient(135deg,#eafaff,#fff)}
.page-hero h1{font-size:clamp(34px,4.5vw,52px);margin:10px 0;color:var(--navy)}
.page-hero p{color:var(--muted);line-height:1.7;max-width:720px;font-size:17px}
.breadcrumb{font-size:13px;color:var(--muted);margin-bottom:6px}
.breadcrumb a:hover{color:var(--turq)}

/* ------------------------------------------------------------- trust bar */
.trust{border-bottom:1px solid var(--line);display:grid;grid-template-columns:repeat(auto-fit,minmax(190px,1fr));gap:16px;padding:24px 0}
.trust div{display:flex;gap:10px;align-items:flex-start;font-size:14px}
.trust b{display:block;color:var(--navy)}
.trust small{color:var(--muted);font-weight:400}
.trust .ticon{width:34px;height:34px;border-radius:50%;background:var(--ice);color:var(--blue);display:grid;place-items:center;flex-shrink:0}
.trust .ticon svg{width:18px;height:18px}

/* --------------------------------------------------------------- generic */
section{padding:80px 0}
.section-head{margin-bottom:30px}
.kicker{color:var(--turq);font-weight:900;letter-spacing:3px;font-size:12px}
.section-head h2{font-size:40px;margin:8px 0;color:var(--navy)}
.section-head p{color:var(--muted);line-height:1.7;max-width:720px}

.services{background:#f6fcfd}
.service-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.card{background:#fff;border:1px solid var(--line);border-radius:18px;overflow:hidden;box-shadow:0 10px 28px #0b6b8510;transition:.25s}
.card:hover{transform:translateY(-5px);box-shadow:0 16px 35px #0b6b8520}
.card img{width:100%;aspect-ratio:4/3;object-fit:cover}
.card-body{padding:16px}
.card h3{margin:0 0 7px;font-size:17px}
.card p{margin:0;color:var(--muted);font-size:13px;line-height:1.5}
.badge{display:inline-block;margin-top:10px;padding:5px 9px;border-radius:12px;background:#e7f9fb;color:#066587;font-size:11px;font-weight:900}
.card-link{display:inline-block;margin-top:10px;font-size:13px;font-weight:800;color:var(--blue);min-height:44px;line-height:44px}

.focus{display:grid;grid-template-columns:1fr 2.2fr;gap:35px;align-items:center}
.focus-copy h2{font-size:42px;margin:8px 0;color:var(--navy)}
.focus-copy p{color:var(--muted);line-height:1.7}
.focus-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:15px}
.focus-card img{aspect-ratio:4/3}
.focus-card .card-body{padding:14px}

/* ------------------------------------------------------------- materials */
.materials{background:#fff}
.materials-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px;margin-bottom:24px}
.material-card{background:#fff;border:1px solid var(--line);border-radius:18px;overflow:hidden;box-shadow:0 10px 28px #0b6b8510}
.material-card img{aspect-ratio:4/3;object-fit:cover}
.material-card .card-body{padding:18px}
.material-card h3{margin:0;font-size:19px;color:var(--navy)}
.material-card .subtitle{font-size:12px;color:var(--blue);font-weight:800;letter-spacing:1px;text-transform:uppercase}
.sustain-panel{border-radius:20px;background:linear-gradient(135deg,var(--navy),var(--blue));color:#fff;padding:32px;display:flex;gap:16px;align-items:flex-start}
.sustain-panel .sicon{width:44px;height:44px;border-radius:50%;background:#ffffff22;display:grid;place-items:center;flex-shrink:0}
.sustain-panel h3{margin:0 0 10px;font-size:22px}
.sustain-panel p{margin:0;color:#d7f4f7;line-height:1.7}

/* --------------------------------------------------------------- projects */
.projects{background:#f6fcfd}
.project-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:14px}
.project img{aspect-ratio:4/3}
.project .card-body{padding:12px}
.project h3{font-size:14px;margin:0 0 4px}
.project p{font-size:12px}
.filter-bar{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:24px}
.filter-bar a{padding:8px 14px;border-radius:20px;border:1px solid var(--line);font-size:13px;font-weight:700;color:var(--navy);min-height:44px;display:inline-flex;align-items:center}
.filter-bar a[aria-current="page"],.filter-bar a:hover{background:var(--turq);border-color:var(--turq);color:#fff}

/* ---------------------------------------------------------------- detail */
.detail-hero{padding:60px 0 20px}
.detail-hero img{width:100%;aspect-ratio:16/7;object-fit:cover;border-radius:18px;margin:20px 0}
.detail-body{max-width:760px;line-height:1.8;color:var(--text)}
.detail-body p{margin:0 0 16px}
.detail-meta{display:flex;gap:16px;flex-wrap:wrap;color:var(--muted);font-size:14px;margin-bottom:8px}

/* ---------------------------------------------------------------- about */
.about-values{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px;margin-top:30px}
.about-values div{background:var(--ice);border-radius:16px;padding:20px}
.about-values h3{margin:0 0 6px;font-size:16px;color:var(--navy)}
.about-values p{margin:0;color:var(--muted);font-size:14px;line-height:1.6}

/* --------------------------------------------------------------- contact */
.contact{padding:0 0 80px}
.contact-box{border-radius:28px;overflow:hidden;background:linear-gradient(110deg,var(--navy),var(--blue));color:#fff;display:grid;grid-template-columns:1.5fr 1fr;align-items:center}
.contact-copy{padding:50px}
.contact-copy h2{font-size:38px;margin:0 0 12px}
.contact-copy p{color:#d7f4f7;line-height:1.7}
.contact-actions{display:flex;gap:10px;flex-wrap:wrap}
.contact-numbers{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin:22px 0}
.contact-number{background:#ffffff12;border:1px solid #ffffff22;border-radius:14px;padding:13px}
.contact-number strong{display:block;color:#fff;font-size:16px}
.contact-number span{display:block;color:#bfeaf0;font-size:12px;margin-top:4px}
.contact-number a{display:inline-flex;margin-top:8px;padding:8px 11px;border-radius:18px;background:var(--turq);color:#fff;font-size:12px;font-weight:800;min-height:36px;align-items:center}
.address-box{margin-top:18px;padding:15px 16px;border-radius:14px;background:#ffffff10;border:1px solid #ffffff20;color:#d7f4f7;line-height:1.6;font-size:14px}
.contact-actions a{background:#fff;color:var(--navy);padding:14px 18px;border-radius:30px;font-weight:900;min-height:44px;display:inline-flex;align-items:center}
.contact-actions a.whatsapp{background:var(--turq);color:#fff}
.contact-img{height:100%;min-height:300px;background-size:cover;background-position:center}
.map-embed{border-radius:18px;overflow:hidden;border:1px solid var(--line);margin-top:20px}
.map-embed iframe{width:100%;height:320px;border:0;display:block}

/* ----------------------------------------------------------------- footer */
footer{background:#052d49;color:#cfeaf1;padding:50px 0 110px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:30px}
.footer h3{color:#fff;margin-top:0;font-size:16px}
.footer p,.footer a{font-size:14px;line-height:1.9;color:#b9d8e0}
.footer a:hover{color:#fff}
.footer-map{margin-top:10px;border-radius:12px;overflow:hidden;display:block;border:1px solid #ffffff22}
.footer-map img{width:100%;aspect-ratio:16/9;object-fit:cover}
.footer-social{display:flex;gap:10px;margin-top:10px}
.footer-social a{width:34px;height:34px;border-radius:50%;background:#ffffff14;display:grid;place-items:center}
.footer-social a:hover{background:var(--turq)}
.bottom{border-top:1px solid #ffffff1a;margin-top:35px;padding-top:18px;font-size:12px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px}
.bottom a{color:#b9d8e0}
.bottom a:hover{color:#fff}

/* ------------------------------------------------------------ whatsapp fab */
.wa-float{position:fixed;right:16px;bottom:max(16px,env(safe-area-inset-bottom));width:56px;height:56px;
  border-radius:50%;background:#25D366;display:grid;place-items:center;z-index:35;box-shadow:0 10px 26px #0b6b8540}
.wa-float svg{width:28px;height:28px;fill:#fff}
.wa-float:hover{filter:brightness(1.05)}

/* ------------------------------------------------------------------- 404 */
.error-page{padding:120px 0;text-align:center}
.error-page h1{font-size:clamp(60px,10vw,120px);color:var(--navy);margin:0}
.error-page p{color:var(--muted);font-size:18px;margin:10px 0 30px}

/* -------------------------------------------------------------- utility */
.flash{background:#e7f9fb;border:1px solid var(--turq);color:var(--navy);padding:14px 18px;border-radius:12px;margin-bottom:20px;font-weight:700}

/* ----------------------------------------------------------- breakpoints */
@media(min-width:1100px){
  .navtoggle{display:none !important}
  .mobilnav{display:none !important}
}
@media(max-width:1099px){
  .navlinks{display:none}
  .navtoggle{display:flex}
  .social-icons{display:none}
}
@media(max-width:900px){
  .hero{grid-template-columns:1fr}
  .hero-copy{padding:60px 0;order:1}
  .hero-img{min-height:340px;order:2}
  .service-grid{grid-template-columns:repeat(2,1fr)}
  .focus{grid-template-columns:1fr}
  .contact-box{grid-template-columns:1fr}
  .contact-numbers{grid-template-columns:1fr 1fr}
  .footer-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:560px){
  .nav{height:var(--header-h)}
  .brand{font-size:14px}
  .actions .outline{display:none}
  .cta{padding:10px 13px;font-size:12px}
  .hero h1{font-size:38px}
  .service-grid,.focus-grid,.project-grid,.materials-grid{grid-template-columns:1fr 1fr}
  .contact-numbers{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .bottom{flex-direction:column;gap:8px}
  footer{padding-bottom:110px}
}