/* =========================================================
   NIVO ÇELİK KONSTRÜKSİYON — Ana stil dosyası
   Konsept: çelik kirişin üç hali — astar boyası (kırmızı oksit),
   galvaniz kaplama ve kaynak kıvılcımı. Teknik çizim ızgarası üzerinde
   geniş, sağlam blok tipografi.
   ========================================================= */

:root {
  /* Renk paleti */
  --grafit: #16191D;      /* ana koyu — çelik profil gölgesi */
  --grafit-2: #1F2429;    /* koyu yüzey */
  --celik: #3A424B;       /* orta ton — işlenmiş çelik */
  --galvaniz: #C9D0D6;    /* açık gri — galvaniz kaplama */
  --kirec: #F2F1EC;       /* zemin — sıcak kırık beyaz */
  --astar: #B5432A;       /* marka rengi — kırmızı oksit astar */
  --astar-koyu: #8E3220;
  --kivilcim: #FF9A3C;    /* vurgu — kaynak kıvılcımı (az kullanılır) */

  --fg: var(--grafit);
  --fg-soft: #4E5760;
  --bg: var(--kirec);
  --line: rgba(22,25,29,.12);

  /* Tipografi */
  --f-display: "Big Shoulders Display", "Arial Narrow", Impact, sans-serif;
  --f-body: "IBM Plex Sans", "Segoe UI", Roboto, Arial, sans-serif;
  --f-mono: "IBM Plex Mono", ui-monospace, Consolas, monospace;

  --wrap: 1240px;
  --gutter: clamp(16px, 4vw, 40px);
  --ease: cubic-bezier(.2,.7,.1,1);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--f-body);
  font-size: 17px;
  line-height: 1.65;
  color: var(--fg);
  background: var(--bg);
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: inherit; }
h1, h2, h3, h4 { font-family: var(--f-display); line-height: .95; margin: 0; text-wrap: balance; font-weight: 800; letter-spacing: .01em; text-transform: uppercase; }
p { margin: 0; }
::selection { background: var(--astar); color: var(--kirec); }
:focus-visible { outline: 2px solid var(--kivilcim); outline-offset: 3px; }

.wrap { width: 100%; max-width: var(--wrap); margin-inline: auto; padding-inline: var(--gutter); }
.mono { font-family: var(--f-mono); font-size: 12.5px; letter-spacing: .14em; text-transform: uppercase; }
.eyebrow { display: inline-flex; align-items: center; gap: 12px; font-family: var(--f-mono); font-size: 12.5px; letter-spacing: .18em; text-transform: uppercase; color: var(--astar); font-weight: 500; }
.eyebrow::before { content: ""; width: 28px; height: 2px; background: currentColor; }
.dark .eyebrow { color: var(--kivilcim); }

/* ---------- Önyükleyici: nivo kabarcığı ortalanır ---------- */
.preloader { position: fixed; inset: 0; z-index: 200; background: var(--grafit); display: grid; place-items: center; transition: opacity .6s var(--ease), visibility .6s; }
.preloader.done { opacity: 0; visibility: hidden; }
.level { width: 180px; height: 22px; border-radius: 11px; border: 2px solid var(--galvaniz); position: relative; overflow: hidden; }
.level::before, .level::after { content: ""; position: absolute; top: 3px; bottom: 3px; width: 2px; background: var(--galvaniz); opacity: .5; }
.level::before { left: calc(50% - 20px); } .level::after { left: calc(50% + 18px); }
.level span { position: absolute; top: 3px; left: 8px; width: 30px; height: 12px; border-radius: 6px; background: var(--kivilcim); box-shadow: 0 0 18px var(--kivilcim); animation: bubble 1.2s var(--ease) forwards; }
@keyframes bubble { 0% { left: 8px } 55% { left: calc(50% - 3px) } 75% { left: calc(50% - 22px) } 100% { left: calc(50% - 15px) } }
.preloader p { margin-top: 18px; color: var(--galvaniz); text-align: center; }

/* ---------- Üst şerit + menü ---------- */
.topbar { background: var(--grafit); color: var(--galvaniz); font-family: var(--f-mono); font-size: 12px; letter-spacing: .08em; }
.topbar .wrap { display: flex; justify-content: space-between; gap: 16px; padding-block: 9px; flex-wrap: wrap; }
.topbar a { text-decoration: none; }
.topbar a:hover { color: var(--kivilcim); }
.topbar .tb-right { display: flex; gap: 22px; flex-wrap: wrap; }

.header { position: sticky; top: 0; z-index: 50; background: rgba(242,241,236,.9); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); border-bottom: 1px solid var(--line); transition: box-shadow .3s; }
.header.scrolled { box-shadow: 0 8px 30px rgba(22,25,29,.08); }
.header .wrap { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding-block: 14px; }
.logo img { height: 46px; width: auto; }
.nav { display: flex; align-items: center; gap: 6px; }
.nav a { position: relative; text-decoration: none; font-weight: 500; font-size: 15px; padding: 10px 14px; }
.nav a::after { content: ""; position: absolute; left: 14px; right: 14px; bottom: 4px; height: 2px; background: var(--astar); transform: scaleX(0); transform-origin: left; transition: transform .35s var(--ease); }
.nav a:hover::after, .nav a.active::after { transform: scaleX(1); }
.nav .btn { margin-left: 10px; }
.menu-btn { display: none; width: 46px; height: 46px; border: 1px solid var(--line); background: transparent; border-radius: 4px; cursor: pointer; position: relative; }
.menu-btn span { position: absolute; left: 12px; right: 12px; height: 2px; background: var(--grafit); transition: transform .3s var(--ease), opacity .2s; }
.menu-btn span:nth-child(1) { top: 16px } .menu-btn span:nth-child(2) { top: 22px } .menu-btn span:nth-child(3) { top: 28px }
.menu-open .menu-btn span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.menu-open .menu-btn span:nth-child(2) { opacity: 0; }
.menu-open .menu-btn span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* ---------- Butonlar ---------- */
.btn { display: inline-flex; align-items: center; gap: 12px; padding: 15px 26px; font-family: var(--f-mono); font-size: 13px; letter-spacing: .12em; text-transform: uppercase; font-weight: 600; text-decoration: none; border: 2px solid var(--astar); background: var(--astar); color: var(--kirec); cursor: pointer; position: relative; overflow: hidden; isolation: isolate; transition: color .35s var(--ease), border-color .35s; }
.btn::before { content: ""; position: absolute; inset: 0; background: var(--grafit); transform: translateX(-101%); transition: transform .45s var(--ease); z-index: -1; }
.btn:hover::before { transform: translateX(0); }
.btn:hover { border-color: var(--grafit); }
.btn svg { width: 18px; height: 18px; transition: transform .35s var(--ease); }
.btn:hover svg { transform: translateX(4px); }
.btn.ghost { background: transparent; color: var(--kirec); border-color: rgba(242,241,236,.4); }
.btn.ghost::before { background: var(--kirec); }
.btn.ghost:hover { color: var(--grafit); border-color: var(--kirec); }
.btn.sm { padding: 11px 18px; font-size: 12px; }

/* ---------- HERO ---------- */
.hero { position: relative; background: var(--grafit); color: var(--kirec); overflow: hidden; isolation: isolate; }
.hero-media { position: absolute; inset: 0; z-index: -2; }
.hero-media img { width: 100%; height: 100%; object-fit: cover; transform: scale(1.12); filter: grayscale(.35) contrast(1.05); animation: heroZoom 9s var(--ease) forwards; }
@keyframes heroZoom { to { transform: scale(1); } }
.hero::before { content: ""; position: absolute; inset: 0; z-index: -1; background:
  linear-gradient(90deg, rgba(22,25,29,.96) 0%, rgba(22,25,29,.82) 45%, rgba(22,25,29,.35) 100%),
  linear-gradient(0deg, rgba(22,25,29,.9) 0%, transparent 40%); }
.blueprint { position: absolute; inset: 0; z-index: -1; pointer-events: none; opacity: .18;
  background-image: linear-gradient(rgba(201,208,214,.5) 1px, transparent 1px), linear-gradient(90deg, rgba(201,208,214,.5) 1px, transparent 1px);
  background-size: 64px 64px; mask-image: linear-gradient(90deg, #000 0%, transparent 70%); -webkit-mask-image: linear-gradient(90deg, #000 0%, transparent 70%); }
.hero .wrap { position: relative; padding-block: clamp(90px, 14vw, 170px) clamp(70px, 9vw, 120px); display: grid; grid-template-columns: minmax(0, 1.3fr) minmax(0, .9fr); gap: 40px; align-items: end; }
.hero h1 { font-size: clamp(46px, 8.2vw, 118px); overflow-wrap: anywhere; line-height: .86; margin: 22px 0 28px; }
.hero h1 .line { display: block; overflow: hidden; }
.hero h1 .line > span { display: inline-block; transform: translateY(105%); animation: rise 1s var(--ease) forwards; }
.hero h1 .line:nth-child(2) > span { animation-delay: .12s; }
.hero h1 .line:nth-child(3) > span { animation-delay: .24s; }
.hero h1 em { font-style: normal; color: var(--astar); -webkit-text-stroke: 0; }
.hero h1 .outline { color: transparent; -webkit-text-stroke: 2px var(--galvaniz); }
@keyframes rise { to { transform: translateY(0); } }
.hero-lead { max-width: 52ch; font-size: clamp(16px, 1.6vw, 19px); color: #C4CAD0; opacity: 0; animation: fadeUp .9s .5s var(--ease) forwards; }
.hero-cta { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 36px; opacity: 0; animation: fadeUp .9s .65s var(--ease) forwards; }
@keyframes fadeUp { from { opacity: 0; transform: translateY(24px); } to { opacity: 1; transform: none; } }

/* Hero sağ: çizilen kafes kiriş */
.truss-card { border: 1px solid rgba(201,208,214,.22); background: rgba(22,25,29,.55); backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px); padding: 22px; opacity: 0; animation: fadeUp 1s .8s var(--ease) forwards; }
.truss-card svg { width: 100%; height: auto; }
.truss-card .draw { stroke-dasharray: 1400; stroke-dashoffset: 1400; animation: draw 2.6s 1s var(--ease) forwards; }
@keyframes draw { to { stroke-dashoffset: 0; } }
.truss-meta { display: flex; justify-content: space-between; gap: 10px; flex-wrap: wrap; margin-top: 14px; color: var(--galvaniz); }
.truss-meta b { color: var(--kivilcim); font-weight: 500; }

.scroll-hint { position: absolute; left: var(--gutter); bottom: 26px; display: flex; align-items: center; gap: 12px; color: var(--galvaniz); }
.scroll-hint i { width: 1px; height: 38px; background: rgba(201,208,214,.3); position: relative; overflow: hidden; }
.scroll-hint i::after { content: ""; position: absolute; left: 0; top: -40%; width: 1px; height: 40%; background: var(--kivilcim); animation: drip 1.8s infinite; }
@keyframes drip { to { top: 100%; } }

/* ---------- Kayan şerit ---------- */
.marquee { background: var(--astar); color: var(--kirec); overflow: hidden; border-block: 1px solid var(--astar-koyu); }
.marquee-track { display: flex; width: max-content; animation: marquee 32s linear infinite; }
.marquee-track span { font-family: var(--f-display); font-weight: 800; font-size: clamp(22px, 3vw, 34px); text-transform: uppercase; padding: 16px 28px; white-space: nowrap; display: flex; align-items: center; gap: 56px; }
.marquee-track span::after { content: ""; width: 14px; height: 14px; background: var(--grafit); transform: rotate(45deg); }
@keyframes marquee { to { transform: translateX(-50%); } }

/* ---------- Bölümler ---------- */
.section { padding-block: clamp(72px, 10vw, 130px); position: relative; }
.section.dark { background: var(--grafit); color: var(--kirec); }
.section.steel { background: #E4E7E9; }
.sec-head { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 32px 60px; align-items: end; margin-bottom: clamp(40px, 6vw, 70px); }
.sec-head h2 { font-size: clamp(40px, 6vw, 82px); margin-top: 16px; }
.sec-head p { color: var(--fg-soft); max-width: 52ch; }
.dark .sec-head p { color: #AEB6BD; }

/* Hakkımızda özet */
.about-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: clamp(32px, 6vw, 90px); align-items: center; }
.about-media { position: relative; }
.about-media .main { aspect-ratio: 4/5; width: 100%; object-fit: cover; }
.about-media .inset { position: absolute; right: -24px; bottom: -32px; width: 48%; aspect-ratio: 1; object-fit: cover; border: 8px solid var(--bg); }
.about-media .badge { position: absolute; left: -18px; top: 28px; background: var(--astar); color: var(--kirec); padding: 18px 22px; }
.about-media .badge strong { display: block; font-family: var(--f-display); font-size: 56px; line-height: .9; }
.about-text h2 { font-size: clamp(38px, 5vw, 68px); margin: 16px 0 24px; }
.about-text p + p { margin-top: 16px; }
.about-text p { color: var(--fg-soft); }
.checks { list-style: none; padding: 0; margin: 28px 0 34px; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px 24px; }
.checks li { display: flex; gap: 12px; align-items: flex-start; font-weight: 500; }
.checks li::before { content: ""; flex: none; width: 18px; height: 18px; margin-top: 4px; background: var(--astar); clip-path: polygon(0 0, 100% 0, 100% 20%, 60% 20%, 60% 80%, 100% 80%, 100% 100%, 0 100%, 0 80%, 40% 80%, 40% 20%, 0 20%); }

/* Hizmet kartları */
.services { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 2px; background: rgba(201,208,214,.14); border: 2px solid rgba(201,208,214,.14); }
.svc { position: relative; background: var(--grafit); padding: 38px 32px 34px; min-height: 360px; display: flex; flex-direction: column; overflow: hidden; isolation: isolate; text-decoration: none; }
.svc-bg { position: absolute; inset: 0; z-index: -1; opacity: 0; transition: opacity .6s var(--ease); }
.svc-bg img { width: 100%; height: 100%; object-fit: cover; transform: scale(1.1); transition: transform 1.2s var(--ease); filter: grayscale(.4); }
.svc-bg::after { content: ""; position: absolute; inset: 0; background: linear-gradient(0deg, rgba(22,25,29,.95) 20%, rgba(22,25,29,.55)); }
.svc:hover .svc-bg { opacity: 1; }
.svc:hover .svc-bg img { transform: scale(1); }
.svc .code { color: var(--kivilcim); }
.svc svg.ico { width: 52px; height: 52px; margin: 26px 0 auto; stroke: var(--galvaniz); transition: stroke .4s, transform .5s var(--ease); }
.svc:hover svg.ico { stroke: var(--kivilcim); transform: translateY(-4px); }
.svc h3 { font-size: 34px; margin: 30px 0 12px; }
.svc p { color: #AEB6BD; font-size: 15.5px; }
.svc .more { margin-top: 20px; display: inline-flex; align-items: center; gap: 10px; color: var(--kirec); }
.svc .more::after { content: "→"; transition: transform .35s var(--ease); }
.svc:hover .more::after { transform: translateX(6px); }

/* Sayaçlar */
.stats { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); border-top: 2px solid var(--grafit); }
.stat { padding: 30px 24px 10px 0; border-right: 1px solid var(--line); }
.stat:last-child { border-right: 0; }
.stat + .stat { padding-left: 24px; }
.stat strong { display: block; font-family: var(--f-display); font-weight: 800; font-size: clamp(54px, 7vw, 96px); line-height: .9; font-variant-numeric: tabular-nums; }
.stat strong sup { font-size: .4em; color: var(--astar); vertical-align: top; margin-left: 4px; }
.stat span { display: block; margin-top: 10px; color: var(--fg-soft); }

/* Süreç (gerçek bir sıra — numaralar anlamlı) */
.process { display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); gap: 0; counter-reset: step; position: relative; }
.process::before { content: ""; position: absolute; left: 0; right: 0; top: 27px; height: 2px; background: repeating-linear-gradient(90deg, var(--celik) 0 10px, transparent 10px 18px); }
.step { position: relative; padding-right: 20px; }
.step .dot { width: 56px; height: 56px; display: grid; place-items: center; background: var(--bg); border: 2px solid var(--grafit); font-family: var(--f-display); font-weight: 800; font-size: 24px; position: relative; transition: background .35s, color .35s; }
.step:hover .dot { background: var(--astar); color: var(--kirec); border-color: var(--astar); }
.step h4 { font-size: 24px; margin: 22px 0 8px; }
.step p { font-size: 15px; color: var(--fg-soft); }

/* Projeler */
.projects { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); gap: 18px; }
.proj { position: relative; overflow: hidden; background: var(--celik); text-decoration: none; color: var(--kirec); display: block; isolation: isolate; min-height: 320px; }
.proj img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; transition: transform 1.1s var(--ease), filter .6s; filter: grayscale(.25); z-index: -2; }
.proj::after { content: ""; position: absolute; inset: 0; z-index: -1; background: linear-gradient(0deg, rgba(22,25,29,.9) 0%, rgba(22,25,29,0) 60%); transition: background .5s; }
.proj:hover img { transform: scale(1.07); filter: grayscale(0); }
.proj:hover::after { background: linear-gradient(0deg, rgba(181,67,42,.92) 0%, rgba(22,25,29,.1) 75%); }
.proj .info { position: absolute; left: 0; right: 0; bottom: 0; padding: 24px 26px; }
.proj .tag { color: var(--kivilcim); transition: color .4s; }
.proj:hover .tag { color: var(--kirec); }
.proj h3 { font-size: clamp(26px, 2.6vw, 36px); margin-top: 8px; }
.proj .spec { display: flex; gap: 18px; flex-wrap: wrap; margin-top: 10px; color: var(--galvaniz); max-height: 0; overflow: hidden; opacity: 0; transition: max-height .5s var(--ease), opacity .4s; }
.proj:hover .spec, .proj:focus-visible .spec { max-height: 60px; opacity: 1; }
.p-a { grid-column: span 7; min-height: 480px; }
.p-b { grid-column: span 5; }
.p-c { grid-column: span 4; }
.p-d { grid-column: span 4; }
.p-e { grid-column: span 4; }
.p-f { grid-column: span 5; }
.p-g { grid-column: span 7; }

/* Filtre */
.filters { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 30px; }
.filters button { font-family: var(--f-mono); font-size: 12.5px; letter-spacing: .12em; text-transform: uppercase; padding: 10px 16px; border: 1px solid var(--line); background: transparent; cursor: pointer; color: var(--fg); transition: background .3s, color .3s, border-color .3s; }
.filters button.on, .filters button:hover { background: var(--grafit); color: var(--kirec); border-color: var(--grafit); }
.proj.hide { display: none; }

/* Neden biz */
.why { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 18px; }
.why-item { border-top: 2px solid var(--astar); padding-top: 22px; }
.why-item .mono { color: var(--kivilcim); }
.why-item h4 { font-size: 26px; margin: 10px 0 10px; }
.why-item p { color: #AEB6BD; font-size: 15.5px; }

/* Referans şeridi / yorum */
.quote { display: grid; grid-template-columns: minmax(0, .8fr) minmax(0, 1.2fr); gap: clamp(30px, 6vw, 80px); align-items: center; }
.quote img { aspect-ratio: 1; object-fit: cover; width: 100%; }
.quote blockquote { margin: 0; font-family: var(--f-display); font-weight: 700; font-size: clamp(30px, 3.6vw, 50px); line-height: 1.02; text-transform: uppercase; }
.quote blockquote::before { content: "“"; display: block; font-size: 1.8em; line-height: .6; color: var(--astar); }
.quote cite { display: block; margin-top: 24px; font-style: normal; }

/* CTA bandı */
.cta-band { position: relative; overflow: hidden; background: var(--astar); color: var(--kirec); isolation: isolate; }
.cta-band img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; z-index: -2; mix-blend-mode: multiply; opacity: .45; filter: grayscale(1); }
.cta-band .wrap { padding-block: clamp(70px, 9vw, 110px); display: flex; align-items: center; justify-content: space-between; gap: 30px; flex-wrap: wrap; }
.cta-band h2 { font-size: clamp(40px, 6vw, 86px); max-width: 14ch; }
.cta-band .btn { background: var(--grafit); border-color: var(--grafit); }
.cta-band .btn::before { background: var(--kirec); }
.cta-band .btn:hover { color: var(--grafit); border-color: var(--kirec); }
.sparks { position: absolute; inset: 0; z-index: -1; pointer-events: none; }

/* Sayfa başlığı (alt sayfalar) */
.page-hero { position: relative; background: var(--grafit); color: var(--kirec); overflow: hidden; isolation: isolate; }
.page-hero img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; z-index: -2; filter: grayscale(.4); opacity: .55; transform: scale(1.08); animation: heroZoom 8s var(--ease) forwards; }
.page-hero::before { content: ""; position: absolute; inset: 0; z-index: -1; background: linear-gradient(90deg, rgba(22,25,29,.95), rgba(22,25,29,.55)); }
.page-hero .wrap { padding-block: clamp(80px, 11vw, 140px) clamp(50px, 6vw, 80px); }
.page-hero h1 { font-size: clamp(56px, 10vw, 140px); line-height: .86; margin-top: 18px; }
.page-hero h1 span { display: inline-block; transform: translateY(40px); opacity: 0; animation: fadeUp .9s .1s var(--ease) forwards; }
.crumbs { margin-top: 26px; color: var(--galvaniz); display: flex; gap: 10px; flex-wrap: wrap; }
.crumbs a { text-decoration: none; } .crumbs a:hover { color: var(--kivilcim); }

/* Hizmet detay satırları */
.svc-row { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: clamp(30px, 6vw, 80px); align-items: center; padding-block: clamp(50px, 6vw, 80px); border-bottom: 1px solid var(--line); }
.svc-row:nth-child(even) .svc-row-media { order: 2; }
.svc-row-media { position: relative; overflow: hidden; }
.svc-row-media img { width: 100%; aspect-ratio: 3/2; object-fit: cover; transition: transform 1.2s var(--ease); }
.svc-row:hover .svc-row-media img { transform: scale(1.04); }
.svc-row-media .code { position: absolute; left: 0; top: 0; background: var(--grafit); color: var(--kivilcim); padding: 10px 14px; }
.svc-row h2 { font-size: clamp(38px, 4.6vw, 62px); margin: 14px 0 18px; }
.svc-row p { color: var(--fg-soft); }
.spec-table { margin-top: 24px; border-top: 1px solid var(--line); }
.spec-table div { display: flex; justify-content: space-between; gap: 20px; padding: 12px 0; border-bottom: 1px solid var(--line); font-size: 15px; }
.spec-table dt, .spec-table span:first-child { color: var(--fg-soft); }
.spec-table span:last-child { font-family: var(--f-mono); font-size: 13.5px; text-align: right; }

/* Değerler / ekip */
.values { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.value { background: #fff; padding: 34px 30px; border: 1px solid var(--line); transition: transform .45s var(--ease), box-shadow .45s; }
.value:hover { transform: translateY(-6px); box-shadow: 0 24px 50px rgba(22,25,29,.1); }
.value h3 { font-size: 30px; margin: 18px 0 10px; }
.value p { color: var(--fg-soft); font-size: 15.5px; }
.value svg { width: 44px; height: 44px; stroke: var(--astar); }

.timeline { position: relative; border-left: 2px solid var(--grafit); margin-left: 8px; }
.tl { position: relative; padding: 0 0 38px 34px; }
.tl::before { content: ""; position: absolute; left: -9px; top: 6px; width: 16px; height: 16px; background: var(--astar); transform: rotate(45deg); }
.tl .mono { color: var(--astar); }
.tl h4 { font-size: 28px; margin: 6px 0 6px; }
.tl p { color: var(--fg-soft); max-width: 60ch; }

.certs { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 26px; }
.certs span { border: 1px solid var(--line); padding: 10px 16px; font-family: var(--f-mono); font-size: 12.5px; letter-spacing: .08em; }

/* İletişim */
.contact-grid { display: grid; grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr); gap: clamp(30px, 6vw, 80px); }
.c-card { display: flex; gap: 18px; padding: 24px 0; border-bottom: 1px solid var(--line); }
.c-card svg { flex: none; width: 28px; height: 28px; stroke: var(--astar); margin-top: 4px; }
.c-card .mono { color: var(--fg-soft); }
.c-card a, .c-card p { font-size: 20px; font-weight: 600; text-decoration: none; margin-top: 4px; display: block; }
.c-card a:hover { color: var(--astar); }
.form { background: var(--grafit); color: var(--kirec); padding: clamp(28px, 4vw, 48px); }
.form h3 { font-size: 40px; margin-bottom: 8px; }
.form > p { color: #AEB6BD; margin-bottom: 26px; }
.fgrid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.field { display: flex; flex-direction: column; gap: 8px; }
.field.full { grid-column: 1 / -1; }
.field label { font-family: var(--f-mono); font-size: 11.5px; letter-spacing: .14em; text-transform: uppercase; color: var(--galvaniz); }
.field input, .field select, .field textarea { font: inherit; font-size: 16px; color: var(--kirec); background: var(--grafit-2); border: 1px solid rgba(201,208,214,.2); padding: 14px 16px; border-radius: 0; transition: border-color .3s; width: 100%; }
.field select option { color: var(--grafit); }
.field textarea { min-height: 140px; resize: vertical; }
.field input:focus, .field select:focus, .field textarea:focus { outline: none; border-color: var(--kivilcim); }
.form .btn { margin-top: 22px; }
.form-note { margin-top: 16px; font-size: 14px; color: var(--galvaniz); min-height: 1.4em; }
.map { margin-top: clamp(50px, 7vw, 90px); aspect-ratio: 21/8; background: #D6DBDF; border: 1px solid var(--line); overflow: hidden; }
.map iframe { width: 100%; height: 100%; border: 0; filter: grayscale(1) contrast(1.05); }

/* SSS */
.faq details { border-bottom: 1px solid var(--line); }
.faq summary { list-style: none; cursor: pointer; display: flex; justify-content: space-between; gap: 20px; padding: 22px 0; font-family: var(--f-display); font-weight: 700; font-size: 26px; text-transform: uppercase; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; color: var(--astar); transition: transform .35s var(--ease); }
.faq details[open] summary::after { transform: rotate(45deg); }
.faq details p { padding-bottom: 22px; color: var(--fg-soft); max-width: 70ch; }

/* ---------- Footer ---------- */
.footer { background: #0F1114; color: #AEB6BD; }
.footer .wrap { padding-block: clamp(60px, 8vw, 90px) 28px; }
.f-top { display: grid; grid-template-columns: minmax(0, 1.4fr) repeat(3, minmax(0, 1fr)); gap: 40px; }
.f-logo { height: 50px; width: auto; filter: brightness(0) invert(1) opacity(.92); }
.footer h5 { font-family: var(--f-mono); font-size: 12px; letter-spacing: .16em; text-transform: uppercase; color: var(--kirec); margin: 0 0 18px; font-weight: 500; }
.footer ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 10px; }
.footer a { text-decoration: none; transition: color .25s; }
.footer a:hover { color: var(--kivilcim); }
.f-about { margin-top: 20px; max-width: 38ch; font-size: 15px; }
.f-big { font-family: var(--f-display); font-weight: 800; font-size: clamp(64px, 16vw, 230px); line-height: .8; text-transform: uppercase; color: transparent; -webkit-text-stroke: 1px rgba(201,208,214,.18); margin: 60px 0 30px; white-space: nowrap; overflow: hidden; }
.f-bottom { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; border-top: 1px solid rgba(201,208,214,.12); padding-top: 24px; font-size: 13.5px; }

/* WhatsApp butonu */
.wa { position: fixed; right: 20px; bottom: calc(20px + env(safe-area-inset-bottom, 0px)); z-index: 60; width: 58px; height: 58px; border-radius: 50%; background: #25D366; display: grid; place-items: center; box-shadow: 0 10px 30px rgba(0,0,0,.25); transition: transform .3s var(--ease); }
.wa:hover { transform: scale(1.08); }
.wa svg { width: 30px; height: 30px; fill: #fff; }
.wa::before { content: ""; position: absolute; inset: 0; border-radius: 50%; background: #25D366; animation: ping 2.4s infinite; z-index: -1; }
@keyframes ping { 0% { transform: scale(1); opacity: .6 } 100% { transform: scale(1.7); opacity: 0 } }

/* Kaydırma animasyonları — JS yoksa içerik görünür kalır */
.js .reveal { opacity: 0; transform: translateY(40px); transition: opacity .9s var(--ease), transform .9s var(--ease); }
.js .reveal.in { opacity: 1; transform: none; }
.js .reveal.d1 { transition-delay: .1s } .js .reveal.d2 { transition-delay: .2s } .js .reveal.d3 { transition-delay: .3s }
.js .clip { clip-path: inset(0 100% 0 0); transition: clip-path 1.2s var(--ease); }
.js .clip.in { clip-path: inset(0 0 0 0); }

/* ---------- Responsive ---------- */
@media (max-width: 1080px) {
  .services { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .process { grid-template-columns: repeat(3, minmax(0, 1fr)); row-gap: 40px; }
  .process::before { display: none; }
  .why { grid-template-columns: repeat(2, minmax(0, 1fr)); row-gap: 34px; }
  .f-top { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .hero .wrap { grid-template-columns: 1fr; }
  .truss-card { max-width: 520px; }
}
@media (max-width: 900px) {
  .nav { position: fixed; top: 0; left: 0; width: 100vw; height: 100vh; height: 100dvh; background: var(--grafit); flex-direction: column; justify-content: center; gap: 4px; transform: translateY(-100%); visibility: hidden; transition: transform .6s var(--ease), visibility 0s .6s; z-index: -1; }
  .menu-open .nav { transform: none; visibility: visible; transition: transform .6s var(--ease), visibility 0s; }
  .nav a { color: var(--kirec); font-family: var(--f-display); font-size: 44px; font-weight: 800; text-transform: uppercase; }
  .nav .btn { margin: 20px 0 0; font-family: var(--f-mono); font-size: 13px; }
  .menu-btn { display: block; z-index: 2; }
  .menu-open .menu-btn span { background: var(--kirec); }
  .menu-open .header { background: var(--grafit); }
  .sec-head, .about-grid, .quote, .contact-grid, .svc-row { grid-template-columns: 1fr; }
  .svc-row:nth-child(even) .svc-row-media { order: 0; }
  .stats { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .stat:nth-child(2) { border-right: 0; }
  .stat:nth-child(3) { padding-left: 0; }
  .values { grid-template-columns: 1fr; }
  .projects { grid-template-columns: 1fr 1fr; }
  .projects .proj { grid-column: span 1; min-height: 300px; }
  .projects .p-a, .projects .p-g { grid-column: span 2; }
  .about-media .inset { right: -8px; }
  .about-media .badge { left: -8px; }
  .topbar .tb-left { display: none; }
}
@media (max-width: 600px) {
  body { font-size: 16px; }
  .services, .process, .why, .f-top, .fgrid, .checks { grid-template-columns: 1fr; }
  .projects { grid-template-columns: 1fr; }
  .projects .proj, .projects .p-a, .projects .p-g { grid-column: span 1; min-height: 280px; }
  .proj .spec { max-height: 60px; opacity: 1; }
  .svc { min-height: 0; }
  .stats { grid-template-columns: 1fr 1fr; }
  .stat { padding-right: 12px; } .stat + .stat { padding-left: 12px; }
  .logo img { height: 38px; }
  .scroll-hint { display: none; }
  .hero h1 .outline { -webkit-text-stroke-width: 1.5px; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; scroll-behavior: auto !important; }
  .js .reveal, .js .clip { opacity: 1; transform: none; clip-path: none; }
}