:root{
  --graphite:#12171C;
  --graphite-2:#1B2229;
  --steel:#5A6874;
  --line:#DCE1E6;
  --paper:#F4F6F8;
  --white:#FFFFFF;
  --accent:#0B5FA5;      /* SDY mavisi */
  --accent-dark:#08477C;
  --zinc:#B9C2CA;
  --maxw:1220px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--white);color:var(--graphite);
  font-family:"IBM Plex Sans",system-ui,sans-serif;font-size:16px;line-height:1.65;
}
h1,h2,h3,h4{font-family:"Archivo",system-ui,sans-serif;line-height:1.15;margin:0 0 .6em;letter-spacing:-.015em}
h1{font-size:clamp(2rem,4.4vw,3.35rem);font-weight:700}
h2{font-size:clamp(1.5rem,2.6vw,2.15rem);font-weight:700}
h3{font-size:1.12rem;font-weight:600}
p{margin:0 0 1rem;max-width:70ch}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 22px}
.sec{padding:76px 0}
.sec--paper{background:var(--paper)}
.sec-head{max-width:62ch;margin-bottom:34px}
.sec-head p{color:var(--steel)}
:focus-visible{outline:3px solid var(--accent);outline-offset:3px}

/* --- üst bar --- */
.topbar{background:var(--graphite);color:var(--zinc);font-size:.86rem}
.topbar .wrap{display:flex;gap:22px;align-items:center;min-height:42px;flex-wrap:wrap}
.topbar a:hover{color:#fff}
.topbar .sep{margin-left:auto;display:flex;gap:10px}
.lang{border:1px solid #33404C;padding:2px 9px;border-radius:2px}
.lang.on{background:var(--accent);border-color:var(--accent);color:#fff}

/* --- header --- */
header{position:sticky;top:0;z-index:60;background:#fff;border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;gap:26px;min-height:82px}
.logo img{height:44px;width:auto}
.menu{display:flex;gap:26px;margin-left:auto;align-items:center}
.menu>li{list-style:none;position:relative}
.menu>li>a{font-weight:600;font-size:.95rem;padding:12px 0;display:inline-block;border-bottom:2px solid transparent}
.menu>li>a:hover,.menu>li>a[aria-expanded="true"]{border-color:var(--accent);color:var(--accent)}
.menu ul{position:absolute;top:100%;left:-14px;background:#fff;border:1px solid var(--line);
  min-width:250px;padding:8px 0;margin:0;display:none;box-shadow:0 14px 34px rgba(18,23,28,.12)}
.menu li:hover>ul,.menu li:focus-within>ul{display:block}
.menu ul li{list-style:none}
.menu ul a{display:block;padding:9px 18px;font-size:.92rem;color:var(--graphite-2)}
.menu ul a:hover{background:var(--paper);color:var(--accent)}
.btn{display:inline-block;padding:13px 24px;font-weight:600;font-size:.94rem;border:1px solid transparent;border-radius:2px}
.btn--fill{background:var(--accent);color:#fff}
.btn--fill:hover{background:var(--accent-dark)}
.btn--line{border-color:currentColor}
.btn--line:hover{background:rgba(255,255,255,.1)}
.btn--dark{border-color:var(--graphite);color:var(--graphite)}
.btn--dark:hover{background:var(--graphite);color:#fff}
.burger{display:none;margin-left:auto;background:none;border:1px solid var(--line);padding:9px 12px;cursor:pointer}

/* --- hero --- */
.hero{position:relative;background:var(--graphite);color:#fff;overflow:hidden}
.slide{display:none;min-height:560px;align-items:center;position:relative}
.slide.on{display:flex}
.slide .wrap{position:relative;z-index:2;padding-top:60px;padding-bottom:60px}
.slide-bg{position:absolute;inset:0;z-index:1;opacity:.5}
.slide-bg img{width:100%;height:100%;object-fit:cover;filter:brightness(.62) saturate(.9)}
.slide::after{content:"";position:absolute;inset:0;z-index:1;
  background:linear-gradient(96deg,rgba(8,12,16,.95) 24%,rgba(8,12,16,.82) 52%,rgba(8,12,16,.55) 100%)}
.slide .wrap{max-width:var(--maxw)}
.kicker{display:inline-block;font-weight:600;font-size:.85rem;color:var(--zinc);
  border-left:3px solid var(--accent);padding-left:12px;margin-bottom:18px}
.hero p{color:#D5DCE2;font-size:1.06rem;max-width:56ch}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap;margin-top:26px}
.dots{position:absolute;bottom:26px;left:0;right:0;z-index:3}
.dots .wrap{display:flex;gap:9px}
.dot{width:34px;height:4px;background:rgba(255,255,255,.3);border:0;padding:0;cursor:pointer}
.dot.on{background:var(--accent)}

/* --- özellik şeridi --- */
.feats{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);
  border:1px solid var(--line);margin-top:-1px}
.feat{background:#fff;padding:34px 28px}
.feat svg{width:38px;height:38px;color:var(--accent);margin-bottom:16px}
.feat p{font-size:.94rem;color:var(--steel);margin:0}

/* --- ürün kartları --- */
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.card{border:1px solid var(--line);background:#fff;display:flex;flex-direction:column}
.card .thumb{background:var(--paper);aspect-ratio:4/3;display:flex;align-items:center;justify-content:center}
.card .thumb svg{width:72%;height:72%;color:var(--graphite-2)}
.card .thumb img.ph{width:100%;height:100%;object-fit:cover}
.card .body{padding:20px 22px 24px;display:flex;flex-direction:column;gap:8px;flex:1}
.card .body span{font-size:.88rem;color:var(--steel)}
.card .more{margin-top:auto;font-weight:600;font-size:.9rem;color:var(--accent)}
.card:hover{border-color:var(--accent)}

/* --- kurumsal --- */
.split{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.stats{display:grid;grid-template-columns:repeat(2,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}
.stat{background:#fff;padding:28px}
.stat b{font-family:"Archivo";font-size:2.3rem;font-weight:700;display:block;color:var(--accent);line-height:1}
.stat span{font-size:.9rem;color:var(--steel)}
.list{margin:0;padding:0}
.list li{list-style:none;padding:12px 0 12px 30px;border-bottom:1px solid var(--line);position:relative}
.list li::before{content:"";position:absolute;left:0;top:20px;width:14px;height:2px;background:var(--accent)}

/* --- sektörler --- */
.sectors{display:grid;grid-template-columns:repeat(5,1fr);gap:1px;background:rgba(255,255,255,.14);
  border:1px solid rgba(255,255,255,.14)}
.sector{background:var(--graphite);padding:30px 22px;color:#fff}
.sector b{display:block;font-family:"Archivo";font-size:1.02rem;margin-bottom:6px}
.sector span{font-size:.87rem;color:var(--zinc)}

/* --- cta --- */
.cta{background:var(--accent);color:#fff}
.cta .wrap{display:flex;align-items:center;gap:30px;padding-top:44px;padding-bottom:44px;flex-wrap:wrap}
.cta h2{margin:0}
.cta p{margin:6px 0 0;color:#DCEAF7}
.cta .btn{margin-left:auto;background:#fff;color:var(--accent)}

/* --- referanslar --- */
.refs{display:grid;grid-template-columns:repeat(6,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}
.refs div{background:#fff;height:112px;display:flex;align-items:center;justify-content:center;padding:18px}
.refs img{max-height:52px;width:auto;object-fit:contain;filter:grayscale(1);opacity:.62}
.refs div:hover img{filter:none;opacity:1}

/* --- blog --- */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.post{border:1px solid var(--line)}
.post .thumb{background:var(--paper);aspect-ratio:16/9;display:flex;align-items:center;justify-content:center;color:var(--zinc);font-size:.85rem}
.post .body{padding:22px}
.post .body p{font-size:.93rem;color:var(--steel);margin:0}

/* --- iletişim / footer --- */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:44px}
.field{display:block;margin-bottom:14px}
.field span{display:block;font-size:.88rem;font-weight:600;margin-bottom:6px}
.field input,.field textarea{width:100%;padding:12px 14px;border:1px solid var(--line);
  font:inherit;font-size:.95rem;border-radius:2px;background:#fff}
.field textarea{min-height:130px;resize:vertical}
footer{background:var(--graphite);color:var(--zinc);padding:62px 0 0;font-size:.93rem}
.fgrid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.1fr;gap:38px}
footer h4{color:#fff;font-size:1rem;margin-bottom:16px}
footer ul{margin:0;padding:0}
footer li{list-style:none;padding:5px 0}
footer a:hover{color:#fff}
footer .logo img{height:46px;margin-bottom:16px}
.fbot{border-top:1px solid #262F38;margin-top:44px;padding:20px 0;font-size:.87rem;
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap}
.wa{position:fixed;right:20px;bottom:20px;z-index:80;background:#25D366;color:#fff;
  width:56px;height:56px;border-radius:50%;display:flex;align-items:center;justify-content:center;
  box-shadow:0 8px 22px rgba(0,0,0,.22)}
.wa svg{width:28px;height:28px}

@media(max-width:1000px){
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .feats{grid-template-columns:repeat(2,1fr)}
  .sectors{grid-template-columns:repeat(2,1fr)}
  .refs{grid-template-columns:repeat(3,1fr)}
  .split,.contact-grid{grid-template-columns:1fr;gap:34px}
  .grid-3{grid-template-columns:1fr}
  .fgrid{grid-template-columns:1fr 1fr}
  .burger{display:block}
  .menu{display:none;position:absolute;top:100%;left:0;right:0;background:#fff;
    border-bottom:1px solid var(--line);flex-direction:column;align-items:stretch;gap:0;padding:8px 22px 18px}
  .menu.open{display:flex}
  .menu ul{position:static;display:block;border:0;box-shadow:none;padding:0 0 0 14px}
  header .nav{position:relative;flex-wrap:wrap}
}
@media(max-width:560px){
  .grid-4,.stats,.refs{grid-template-columns:repeat(2,1fr)}
  .fgrid{grid-template-columns:1fr}
  .slide{min-height:480px}
}
@media(prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}

/* ===== ÜRÜN DETAY SAYFASI ===== */
.crumb{background:var(--paper);border-bottom:1px solid var(--line);font-size:.88rem;color:var(--steel)}
.crumb .wrap{padding-top:16px;padding-bottom:16px}
.crumb a:hover{color:var(--accent)}
.pd{display:grid;grid-template-columns:1fr 1fr;gap:52px;align-items:start;padding:56px 0}
.gal .main{border:1px solid var(--line);background:var(--paper);aspect-ratio:4/3;
  display:flex;align-items:center;justify-content:center;overflow:hidden}
.gal .main img{width:100%;height:100%;object-fit:cover}
.gal .main svg{width:70%;height:70%;color:var(--graphite-2)}
.gal .thumbs{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin-top:10px}
.gal .thumbs div{border:1px solid var(--line);background:var(--paper);aspect-ratio:1;
  display:flex;align-items:center;justify-content:center;font-size:.72rem;color:var(--steel);text-align:center;padding:6px}
.pd h1{font-size:clamp(1.6rem,3vw,2.3rem)}
.specs{width:100%;border-collapse:collapse;margin:20px 0 26px}
.specs th,.specs td{border:1px solid var(--line);padding:10px 14px;text-align:left;font-size:.94rem}
.specs th{background:var(--paper);font-weight:600;width:42%}
.pd .acts{display:flex;gap:12px;flex-wrap:wrap}
.tabs{display:flex;gap:0;border-bottom:1px solid var(--line);flex-wrap:wrap}
.tabs button{background:none;border:0;border-bottom:3px solid transparent;padding:14px 20px;
  font:inherit;font-weight:600;font-size:.95rem;cursor:pointer;color:var(--steel)}
.tabs button[aria-selected="true"]{color:var(--accent);border-color:var(--accent)}
.panel{display:none;padding-top:30px}
.panel.on{display:block}
.dwg{border:1px solid var(--line);background:#fff;padding:18px}
.dwg svg{width:100%;height:auto;color:var(--graphite)}
.tblwrap{overflow-x:auto;margin-top:22px;border:1px solid var(--line)}
.dim{border-collapse:collapse;width:100%;min-width:900px;font-size:.87rem;font-variant-numeric:tabular-nums}
.dim th,.dim td{border:1px solid var(--line);padding:7px 10px;text-align:center;white-space:nowrap}
.dim thead th{background:var(--accent);color:#fff;font-weight:600;border-color:var(--accent-dark)}
.dim tbody tr:nth-child(even){background:var(--paper)}
.dim td:first-child,.dim th:first-child{text-align:left;font-weight:600}
.dim .note td{background:#EAF2F9;color:var(--graphite-2);font-style:italic}
.tbl-cap{display:flex;justify-content:space-between;align-items:baseline;gap:14px;flex-wrap:wrap;margin-top:26px}
.tbl-cap span{font-size:.85rem;color:var(--steel)}
@media(max-width:1000px){.pd{grid-template-columns:1fr;gap:34px;padding:36px 0}}
.gal .thumbs div img{width:100%;height:100%;object-fit:cover}


/* ===== DÜZELTMELER VE SON RÖTUŞ ===== */
section[id],div[id]{scroll-margin-top:96px}
.logo img{height:46px}

/* referans karoları (logo dosyası gelene kadar isimle) */
.refs div span{font-family:"Archivo",sans-serif;font-weight:600;font-size:.97rem;
  color:#79828A;text-align:center;line-height:1.3}
.refs div:hover span{color:var(--accent)}

/* hero zemini: teknik ızgara deseni */
.slide-bg{background-color:#0F1418;
  background-image:
    linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px),
    radial-gradient(circle at 78% 42%,rgba(11,95,165,.55),transparent 62%);
  background-size:46px 46px,46px 46px,100% 100%;opacity:1}

/* form */
.field input:focus,.field textarea:focus{border-color:var(--accent);outline:none;
  box-shadow:0 0 0 3px rgba(11,95,165,.15)}
button{cursor:pointer}
.form-msg{margin-top:12px;font-size:.92rem;color:var(--accent);display:none}
.form-msg.on{display:block}

/* uzun tablo başlığı sabit kalsın */
.tblwrap{max-height:none}
.dim thead th{position:sticky;top:0;z-index:1}

/* baskı */
@media print{
  header,.topbar,.wa,.cta,.tabs{display:none}
  .panel{display:block!important}
  body{font-size:12px}
}

/* ===== ÜRÜN KATEGORİ / LİSTE SAYFALARI ===== */
.page-head{background:var(--graphite);color:#fff;padding:52px 0 46px}
.page-head h1{margin:0 0 10px}
.page-head .bc{font-size:.9rem;color:var(--zinc)}
.page-head .bc a:hover{color:#fff}
.prod{display:grid;grid-template-columns:290px 1fr;gap:46px;align-items:start;padding:54px 0}
.side{border:1px solid var(--line);position:sticky;top:100px}
.side h4{margin:0;padding:16px 20px;background:var(--paper);border-bottom:1px solid var(--line);font-size:.95rem}
.side ul{margin:0;padding:0;max-height:70vh;overflow:auto}
.side li{list-style:none}
.side a{display:block;padding:11px 20px;font-size:.9rem;border-bottom:1px solid var(--line);color:var(--graphite-2)}
.side a:hover{background:var(--paper);color:var(--accent)}
.side a.on{background:var(--accent);color:#fff;font-weight:600}
.prod-gal{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-bottom:30px}
.prod-gal div{border:1px solid var(--line);background:var(--paper);aspect-ratio:4/3;overflow:hidden;
  display:flex;align-items:center;justify-content:center;color:var(--steel);font-size:.8rem}
.prod-gal img{width:100%;height:100%;object-fit:cover}
.spec-block{margin-bottom:26px}
.spec-block h3{margin-bottom:8px;padding-bottom:8px;border-bottom:2px solid var(--accent);display:inline-block}
.spec-block ul{margin:8px 0 0;padding:0}
.spec-block li{list-style:none;padding:7px 0 7px 26px;position:relative;border-bottom:1px solid var(--line);font-size:.95rem}
.spec-block li::before{content:"";position:absolute;left:0;top:16px;width:13px;height:2px;background:var(--accent)}
.spec-block li b{font-weight:600}
.prod-cta{border:1px solid var(--line);background:var(--paper);padding:22px 24px;margin-top:30px;
  display:flex;align-items:center;gap:18px;flex-wrap:wrap}
.prod-cta p{margin:0;font-size:.95rem;color:var(--steel)}
.prod-cta .btn{margin-left:auto}
.cat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
@media(max-width:1000px){
  .prod{grid-template-columns:1fr;gap:28px;padding:32px 0}
  .side{position:static}
  .side ul{max-height:none}
  .cat-grid{grid-template-columns:repeat(2,1fr)}
  .prod-gal{grid-template-columns:repeat(2,1fr)}
}

/* ===== FLANŞ KÜTÜPHANESİ ===== */
.chips{display:flex;flex-wrap:wrap;gap:8px;margin:26px 0 14px}
.chip{background:#fff;border:1px solid var(--line);padding:9px 16px;font:inherit;font-size:.9rem;
  font-weight:600;color:var(--steel);border-radius:2px}
.chip:hover{border-color:var(--accent);color:var(--accent)}
.chip.on{background:var(--accent);border-color:var(--accent);color:#fff}
.fcount{margin:0 0 20px}
.card .tag{font-size:.76rem;font-weight:600;letter-spacing:.04em;color:var(--accent);text-transform:uppercase}
.fcard .thumb{background:var(--paper)}
.fcard h3{font-size:1rem;margin:2px 0 4px}

/* ===== MENÜ (tıklanabilir alt menü) ===== */
.menu li.has-sub{position:relative;display:flex;align-items:center;gap:4px}
.sub-toggle{background:none;border:0;font-size:.8rem;line-height:1;padding:6px;color:var(--steel)}
.sub-toggle:hover{color:var(--accent)}
.menu li.has-sub.open>ul{display:block}
.menu li.has-sub.open>.sub-toggle{color:var(--accent);transform:rotate(180deg)}
@media(max-width:1000px){
  .menu li.has-sub{flex-wrap:wrap}
  .menu li.has-sub>a{flex:1}
  .menu li:hover>ul{display:none}
  .menu li.has-sub.open>ul{display:block;padding-left:14px}
  .sub-toggle{font-size:1rem;padding:10px 14px}
}
.legend{font-size:.85rem;color:var(--steel);margin-top:10px;line-height:1.6}
.refs img + span{display:none}
.post .thumb img{width:100%;height:100%;object-fit:cover}

/* ===== TEKNİK DOKÜMAN ===== */
.pdfpage{border:1px solid var(--line);background:#fff;margin-top:12px;padding:10px}
.pdfpage img{width:100%;height:auto;display:block}
.pdfdl{margin:12px 0 0}
.dwg img{width:100%;height:auto;display:block}
.urunkod{font-size:.85rem;font-weight:600;letter-spacing:.04em;color:var(--accent);text-transform:uppercase;margin-bottom:8px}
.tabwrap{background:#fff;border:1px solid var(--line)}
.tabwrap .tabs{border-bottom:1px solid var(--line);background:var(--paper)}
.tabwrap .panel{padding:26px}

/* ===== LOGO (orijinal sdymetal.com kurumsal logosu) ===== */
.logo img{height:46px;width:auto;display:block}
footer .logo{display:inline-block;background:#fff;padding:10px 14px;border-radius:6px;margin-bottom:16px}
footer .logo img{height:42px;margin-bottom:0}
@media(max-width:640px){.logo img{height:38px}}