/* ==========================================================================
   KAYATAŞ İNŞAAT — Premium Kurumsal Tasarım Sistemi
   Bölümler:
   1.  Tasarım Değişkenleri (Design Tokens)
   2.  Reset & Temel Elementler
   3.  Tipografi & Yardımcı Sınıflar
   4.  Butonlar
   5.  Header / Navigasyon
   6.  Hero
   7.  İstatistik / Güven Göstergeleri
   8.  Bölüm Başlıkları
   9.  Öne Çıkan Hizmet (Epoksi Vitrini)
   10. Hizmet Kartları
   11. Referans Projeler
   12. AI Danışman Chatbot
   13. Neden Biz?
   14. SEO Şehirler
   15. Blog / Rehber
   16. SSS (Accordion)
   17. İletişim & Form
   18. Footer
   19. Mobil Hızlı Aksiyon Barı
   20. Hizmet Detay Sayfası Bileşenleri
   21. Animasyonlar (Reveal)
   22. Responsive
   ========================================================================== */

/* ---------- 1. Tasarım Değişkenleri ---------- */
:root {
  /* Renk paleti — Antrasit / Beton Gri / Beyaz / Altın */
  --c-ink:        #0e1013;   /* en koyu antrasit */
  --c-anthracite: #16191e;
  --c-graphite:   #1e232b;
  --c-steel:      #2a303a;
  --c-concrete:   #6b7280;   /* beton gri */
  --c-mist:       #9aa1ab;
  --c-cloud:      #e6e8ec;
  --c-paper:      #f5f6f8;
  --c-white:      #ffffff;

  --c-gold:       #2569d6;   /* mavi vurgu (değişken adı korundu) */
  --c-gold-soft:  #5b95ea;
  --c-gold-deep:  #1a54b0;

  /* Fonksiyonel */
  --c-bg:         var(--c-white);
  --c-bg-dark:    var(--c-anthracite);
  --c-text:       #1b1f26;
  --c-text-soft:  #59606b;
  --c-line:       #e4e7eb;
  --c-line-dark:  rgba(255,255,255,.08);

  /* Tipografi */
  --font-display: 'Sora', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-body:    'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;

  /* Yerleşim */
  --container: 1240px;
  --radius-sm: 8px;
  --radius:    16px;
  --radius-lg: 24px;

  /* Gölgeler */
  --shadow-sm: 0 2px 8px rgba(14,16,19,.06);
  --shadow:    0 12px 40px rgba(14,16,19,.10);
  --shadow-lg: 0 30px 70px rgba(14,16,19,.18);
  --shadow-gold: 0 14px 40px rgba(37,105,214,.28);

  /* Geçişler */
  --ease: cubic-bezier(.22,.61,.36,1);
  --t: .4s var(--ease);
}

/* ---------- 2. Reset & Temel ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--font-body);
  color: var(--c-text);
  background: var(--c-bg);
  line-height: 1.65;
  font-size: 16px;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
input, select, textarea { font-family: inherit; font-size: 1rem; }
::selection { background: var(--c-gold); color: var(--c-white); }

/* ---------- 3. Tipografi & Yardımcılar ---------- */
.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 24px; }

h1, h2, h3, h4 { font-family: var(--font-display); font-weight: 700; line-height: 1.12; letter-spacing: -.02em; color: var(--c-ink); }

.section { padding: 110px 0; position: relative; }
.section--tight { padding: 80px 0; }
.section--dark { background: var(--c-paper); color: var(--c-text); }
.section--dark h1, .section--dark h2, .section--dark h3, .section--dark h4 { color: var(--c-ink); }
.section--paper { background: var(--c-paper); }

.eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--font-body);
  font-size: .82rem; font-weight: 700; letter-spacing: .16em; text-transform: uppercase;
  color: var(--c-gold-deep);
}
.eyebrow::before { content: ""; width: 30px; height: 2px; background: var(--c-gold); display: inline-block; }
.section--dark .eyebrow { color: var(--c-gold-deep); }

.lead { font-size: 1.15rem; color: var(--c-text-soft); max-width: 62ch; }
.section--dark .lead { color: var(--c-text-soft); }

.text-gold { color: var(--c-gold-deep); }
.section--dark .text-gold { color: var(--c-gold-deep); }

/* ---------- 4. Butonlar ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  padding: 15px 30px; border-radius: 999px;
  font-family: var(--font-display); font-weight: 600; font-size: .98rem;
  letter-spacing: .01em; white-space: nowrap;
  transition: transform var(--t), box-shadow var(--t), background var(--t), color var(--t);
  will-change: transform;
}
.btn i { font-size: .95em; }
.btn:hover { transform: translateY(-3px); }

.btn--gold { background: var(--c-gold); color: var(--c-white); box-shadow: var(--shadow-gold); }
.btn--gold:hover { background: var(--c-gold-soft); }

.btn--dark { background: var(--c-ink); color: var(--c-white); }
.btn--dark:hover { background: var(--c-steel); }

.btn--ghost { background: transparent; color: var(--c-ink); border: 1.5px solid var(--c-line); }
.btn--ghost:hover { border-color: var(--c-ink); background: var(--c-ink); color: var(--c-white); }

.btn--outline-light { background: rgba(255,255,255,.06); color: var(--c-white); border: 1.5px solid rgba(255,255,255,.28); backdrop-filter: blur(6px); }
.btn--outline-light:hover { background: var(--c-white); color: var(--c-ink); }

.btn--lg { padding: 18px 38px; font-size: 1.05rem; }
.btn--block { width: 100%; }

.link-arrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-display); font-weight: 600; color: var(--c-gold-deep);
  transition: gap var(--t), color var(--t);
}
.link-arrow i { transition: transform var(--t); }
.link-arrow:hover { gap: 12px; color: var(--c-ink); }
.link-arrow:hover i { transform: translateX(3px); }

/* ---------- 5. Header / Navigasyon ---------- */
.header {
  position: fixed; inset: 0 0 auto 0; z-index: 1000;
  transition: background var(--t), box-shadow var(--t), padding var(--t);
  padding: 18px 0;
}
.header--scrolled {
  background: rgba(255,255,255,.85);
  backdrop-filter: blur(16px) saturate(1.4);
  box-shadow: 0 1px 0 var(--c-line), 0 12px 34px rgba(14,16,19,.07);
  padding: 12px 0;
}
.nav { display: flex; align-items: center; justify-content: space-between; gap: 12px; }

.brand { display: flex; align-items: center; gap: 12px; }
.brand__mark {
  width: 46px; height: 46px; border-radius: 12px; display: grid; place-items: center;
  background: linear-gradient(135deg, var(--c-gold), var(--c-gold-deep));
  color: var(--c-white); font-family: var(--font-display); font-weight: 800; font-size: 1.35rem;
  box-shadow: var(--shadow-gold);
}
.brand__text { display: flex; flex-direction: column; line-height: 1.05; }
.brand__name { font-family: var(--font-display); font-weight: 800; font-size: 1.28rem; color: var(--c-ink); letter-spacing: -.01em; }
.brand__tag { font-size: .68rem; letter-spacing: .22em; text-transform: uppercase; color: var(--c-gold-deep); font-weight: 600; }

/* Menü — cam pill konteyner + altın alt-çizgi göstergesi */
.nav__menu {
  display: flex; align-items: center; gap: 1px;
  padding: 4px; border-radius: 999px;
  background: rgba(14,16,19,.035);
  border: 1px solid rgba(14,16,19,.07);
  backdrop-filter: blur(12px);
}
.nav__link {
  position: relative; padding: 8px 12px; border-radius: 999px; white-space: nowrap;
  font-weight: 500; font-size: .86rem; letter-spacing: -.015em;
  color: var(--c-text-soft);
  transition: color .3s var(--ease), background .3s var(--ease);
}
.nav__link::after {
  content: ""; position: absolute; left: 12px; right: 12px; bottom: 5px; height: 2px;
  background: linear-gradient(90deg, var(--c-gold), var(--c-gold-soft));
  border-radius: 2px; transform: scaleX(0); transform-origin: center;
  transition: transform .32s var(--ease);
}
.nav__link:hover { color: var(--c-ink); }
.nav__link:hover::after { transform: scaleX(1); }
.nav__link.is-active { color: var(--c-ink); background: rgba(14,16,19,.05); }
.nav__link.is-active::after { transform: scaleX(1); }
.nav__link--featured { color: var(--c-gold-deep); font-weight: 700; }
.nav__link--featured::before { content: "\f005"; font-family: "Font Awesome 6 Free"; font-weight: 900; font-size: .62em; margin-right: 6px; vertical-align: middle; opacity: .95; }
.nav__link--featured:hover { color: var(--c-gold-deep); }

.nav__actions { display: flex; align-items: center; gap: 12px; }
.nav__phone { display: flex; align-items: center; gap: 9px; color: var(--c-ink); font-weight: 600; font-size: .92rem; white-space: nowrap; }
.nav__phone i { color: var(--c-gold-deep); }

.nav__toggle { display: none; width: 46px; height: 46px; border-radius: 12px; background: rgba(14,16,19,.05); color: var(--c-ink); font-size: 1.3rem; align-items: center; justify-content: center; }

/* Mobil off-canvas menü */
.nav__mobile {
  position: fixed; inset: 0; z-index: 1100; background: var(--c-white);
  display: flex; flex-direction: column; padding: 90px 28px 40px;
  transform: translateX(100%); transition: transform .45s var(--ease); visibility: hidden;
}
.nav__mobile.is-open { transform: translateX(0); visibility: visible; }
.nav__mobile a { padding: 16px 6px; font-family: var(--font-display); font-size: 1.35rem; font-weight: 600; color: var(--c-ink); border-bottom: 1px solid var(--c-line); }
.nav__mobile a.featured { color: var(--c-gold-deep); }
.nav__close { position: absolute; top: 26px; right: 24px; width: 46px; height: 46px; border-radius: 12px; background: rgba(14,16,19,.05); color: var(--c-ink); font-size: 1.4rem; }
.nav__mobile-cta { margin-top: auto; display: grid; gap: 12px; }

/* ---------- 6. Hero ---------- */
.hero { position: relative; min-height: 100vh; display: flex; align-items: center; padding: 140px 0 90px; overflow: hidden; background: linear-gradient(120deg, #f7f8fa, #eceef2); }
.hero__bg { position: absolute; inset: 0; z-index: 0; background-size: cover; background-position: right center; }
.hero__bg::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(105deg, #f7f8fa 0%, #f7f8fa 36%, rgba(247,248,250,.55) 60%, rgba(247,248,250,.12) 100%);
}
.hero__glow { position: absolute; top: -20%; right: -10%; width: 60vw; height: 60vw; background: radial-gradient(circle, rgba(37,105,214,.18), transparent 60%); z-index: 1; pointer-events: none; }
.hero .container { position: relative; z-index: 2; }
.hero__grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: 60px; align-items: center; }

.hero__badge {
  display: inline-flex; align-items: center; gap: 10px; padding: 8px 18px; border-radius: 999px;
  background: rgba(14,16,19,.04); border: 1px solid var(--c-line);
  color: var(--c-text-soft); font-size: .82rem; font-weight: 500; margin-bottom: 26px;
}
.hero__badge b { color: var(--c-gold-deep); font-weight: 700; }
.hero h1 { color: var(--c-ink); font-size: clamp(2.3rem, 5.2vw, 4rem); margin-bottom: 24px; }
.hero h1 span { color: var(--c-gold-deep); }
.hero__sub { color: var(--c-text-soft); font-size: 1.18rem; max-width: 56ch; margin-bottom: 36px; }
.hero__cta { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 40px; }
.hero__mini { display: flex; flex-wrap: wrap; gap: 26px; }
.hero__mini-item { display: flex; align-items: center; gap: 12px; color: var(--c-text); }
.hero__mini-item i { color: var(--c-gold-deep); font-size: 1.4rem; }
.hero__mini-item b { display: block; font-family: var(--font-display); font-size: 1.15rem; color: var(--c-ink); }
.hero__mini-item small { color: var(--c-concrete); font-size: .82rem; }

/* Hero görsel kartı */
.hero__visual { position: relative; }
.hero__card {
  border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-lg);
  aspect-ratio: 4/5; background-size: cover; background-position: center; position: relative;
  border: 1px solid rgba(255,255,255,.08);
}
.hero__card::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, transparent 55%, rgba(10,12,15,.75)); }
.hero__card-tag {
  position: absolute; left: 22px; bottom: 22px; z-index: 2; color: var(--c-white);
}
.hero__card-tag b { font-family: var(--font-display); font-size: 1.1rem; display: block; }
.hero__card-tag small { color: var(--c-gold-soft); letter-spacing: .1em; text-transform: uppercase; font-size: .72rem; }
.hero__float {
  position: absolute; left: -28px; bottom: 40px; z-index: 3;
  background: var(--c-white); border-radius: var(--radius); padding: 18px 22px; box-shadow: var(--shadow-lg);
  display: flex; align-items: center; gap: 14px; max-width: 250px;
}
.hero__float .ic { width: 44px; height: 44px; border-radius: 12px; background: rgba(37,105,214,.14); color: var(--c-gold-deep); display: grid; place-items: center; font-size: 1.2rem; flex-shrink: 0; }
.hero__float b { font-family: var(--font-display); display: block; color: var(--c-ink); font-size: 1rem; }
.hero__float small { color: var(--c-text-soft); font-size: .8rem; }

.hero__scroll { position: absolute; left: 50%; bottom: 26px; transform: translateX(-50%); z-index: 2; color: var(--c-concrete); font-size: .78rem; letter-spacing: .2em; text-transform: uppercase; display: flex; flex-direction: column; align-items: center; gap: 10px; }
.hero__scroll span { width: 1px; height: 40px; background: linear-gradient(var(--c-gold-deep), transparent); animation: scrollLine 2s infinite; }
@keyframes scrollLine { 0%{opacity:.2;transform:scaleY(.4)} 50%{opacity:1;transform:scaleY(1)} 100%{opacity:.2;transform:scaleY(.4)} }

/* ---------- 7. İstatistik / Güven ---------- */
.stats { background: var(--c-paper); border-top: 1px solid var(--c-line); border-bottom: 1px solid var(--c-line); }
.stats__grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 20px; }
.stat { text-align: center; padding: 20px 12px; position: relative; }
.stat:not(:last-child)::after { content: ""; position: absolute; right: 0; top: 20%; height: 60%; width: 1px; background: var(--c-line); }
.stat__num { font-family: var(--font-display); font-weight: 800; font-size: clamp(2rem, 3.4vw, 2.9rem); color: var(--c-ink); line-height: 1; }
.stat__num .suffix { color: var(--c-gold-deep); }
.stat__label { color: var(--c-text-soft); font-size: .92rem; margin-top: 8px; }

/* ---------- 8. Bölüm Başlıkları ---------- */
.sec-head { max-width: 720px; margin-bottom: 56px; }
.sec-head--center { margin-left: auto; margin-right: auto; text-align: center; }
.sec-head h2 { font-size: clamp(1.9rem, 3.8vw, 2.9rem); margin: 18px 0 18px; }
.sec-head.is-split { max-width: none; display: flex; align-items: flex-end; justify-content: space-between; gap: 40px; }
.sec-head.is-split .sec-head__text { max-width: 640px; }

/* ---------- 9. Öne Çıkan Hizmet — Epoksi Vitrini ---------- */
.epoxy { background: var(--c-paper); color: var(--c-text); overflow: hidden; position: relative; }
.epoxy__glow { position: absolute; top: 10%; left: -10%; width: 40vw; height: 40vw; background: radial-gradient(circle, rgba(37,105,214,.10), transparent 65%); pointer-events: none; }
.epoxy__top { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; margin-bottom: 60px; position: relative; z-index: 1; }
.epoxy h2 { color: var(--c-ink); font-size: clamp(2.1rem, 4.4vw, 3.4rem); }
.epoxy h2 span { color: var(--c-gold-deep); }
.epoxy__usage { display: flex; flex-wrap: wrap; gap: 10px; margin: 26px 0; }
.chip {
  padding: 9px 16px; border-radius: 999px; background: var(--c-white);
  border: 1px solid var(--c-line); font-size: .88rem; color: var(--c-text);
  display: inline-flex; align-items: center; gap: 8px; transition: border-color var(--t), background var(--t), box-shadow var(--t);
}
.chip i { color: var(--c-gold-deep); font-size: .85em; }
.chip:hover { border-color: var(--c-gold); box-shadow: var(--shadow-sm); }

.epoxy__showcase { position: relative; }
.epoxy__showcase-img { border-radius: var(--radius-lg); overflow: hidden; aspect-ratio: 5/4; background-size: cover; background-position: center; box-shadow: var(--shadow-lg); border: 1px solid rgba(255,255,255,.08); }
.epoxy__stat-pill { position: absolute; right: -18px; top: -18px; background: var(--c-gold); color: var(--c-white); border-radius: var(--radius); padding: 16px 22px; box-shadow: var(--shadow-gold); text-align: center; }
.epoxy__stat-pill b { font-family: var(--font-display); font-size: 1.8rem; display: block; line-height: 1; }
.epoxy__stat-pill small { font-size: .78rem; font-weight: 600; }

/* Epoksi sistem kartları */
.epoxy__systems { display: grid; grid-template-columns: repeat(5, 1fr); gap: 18px; position: relative; z-index: 1; }
.sys-card {
  border-radius: var(--radius); overflow: hidden; position: relative; min-height: 320px;
  display: flex; flex-direction: column; justify-content: flex-end; padding: 22px;
  background-size: cover; background-position: center; color: var(--c-white);
  transition: transform var(--t), box-shadow var(--t);
}
.sys-card::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, rgba(10,12,15,.15) 0%, rgba(10,12,15,.55) 45%, rgba(10,12,15,.92) 100%); z-index: 0; }
.sys-card > * { position: relative; z-index: 1; }
.sys-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-lg); }
.sys-card .ic { width: 44px; height: 44px; border-radius: 12px; background: rgba(37,105,214,.95); color: var(--c-white); display: grid; place-items: center; font-size: 1.2rem; margin-bottom: 14px; }
.sys-card h3 { color: var(--c-white); font-size: 1.15rem; margin-bottom: 6px; }
.sys-card p { color: var(--c-mist); font-size: .86rem; line-height: 1.5; }
.epoxy__cta { text-align: center; margin-top: 50px; position: relative; z-index: 1; }

/* ---------- 10. Hizmet Kartları ---------- */
.services__grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 26px; }
.svc-card {
  background: var(--c-white); border: 1px solid var(--c-line); border-radius: var(--radius-lg);
  overflow: hidden; display: flex; flex-direction: column;
  transition: transform var(--t), box-shadow var(--t), border-color var(--t);
}
.svc-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); border-color: transparent; }
.svc-card--feature { grid-column: span 2; flex-direction: row; }
.svc-card__media { position: relative; overflow: hidden; background-size: cover; background-position: center; min-height: 240px; }
.svc-card--feature .svc-card__media { flex: 0 0 46%; min-height: 340px; }
.svc-card__media::after { content: ""; position: absolute; inset: 0; background: linear-gradient(120deg, rgba(14,16,19,.35), transparent 60%); }
.svc-card__num { position: absolute; top: 18px; left: 18px; z-index: 2; font-family: var(--font-display); font-weight: 800; font-size: 1.1rem; color: var(--c-white); background: rgba(14,16,19,.55); backdrop-filter: blur(6px); width: 42px; height: 42px; border-radius: 12px; display: grid; place-items: center; }
.svc-card__flag { position: absolute; top: 18px; right: 18px; z-index: 2; background: var(--c-gold); color: var(--c-white); font-size: .72rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; padding: 6px 12px; border-radius: 999px; }
.svc-card__body { padding: 30px; display: flex; flex-direction: column; flex: 1; }
.svc-card--feature .svc-card__body { justify-content: center; padding: 44px; }
.svc-card__ic { width: 52px; height: 52px; border-radius: 14px; background: rgba(37,105,214,.12); color: var(--c-gold-deep); display: grid; place-items: center; font-size: 1.35rem; margin-bottom: 18px; }
.svc-card h3 { font-size: 1.4rem; margin-bottom: 10px; }
.svc-card--feature h3 { font-size: 1.9rem; }
.svc-card p { color: var(--c-text-soft); margin-bottom: 20px; flex: 1; }
.svc-card__meta { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 22px; }
.svc-card__meta span { font-size: .82rem; color: var(--c-concrete); background: var(--c-paper); padding: 5px 12px; border-radius: 999px; }
.svc-card__foot { display: flex; align-items: center; justify-content: space-between; margin-top: auto; }

/* ---------- 11. Referans Projeler ---------- */
.projects__grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.proj-card {
  border-radius: var(--radius-lg); overflow: hidden; position: relative; min-height: 420px;
  display: flex; flex-direction: column; justify-content: flex-end; padding: 28px;
  background-size: cover; background-position: center; color: var(--c-white);
  transition: transform var(--t);
}
.proj-card::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, rgba(10,12,15,.1) 0%, rgba(10,12,15,.55) 50%, rgba(10,12,15,.95) 100%); z-index: 0; }
.proj-card > * { position: relative; z-index: 1; }
.proj-card:hover { transform: translateY(-6px); }
.proj-card__badge { position: absolute; top: 22px; left: 22px; background: rgba(37,105,214,.95); color: var(--c-white); font-size: .74rem; font-weight: 700; padding: 6px 13px; border-radius: 999px; text-transform: uppercase; letter-spacing: .05em; }
.proj-card__badge.is-other { background: rgba(255,255,255,.14); color: var(--c-white); border: 1px solid rgba(255,255,255,.2); backdrop-filter: blur(6px); }
.proj-card__city { display: flex; align-items: center; gap: 7px; color: var(--c-gold-soft); font-size: .84rem; font-weight: 600; margin-bottom: 8px; }
.proj-card h3 { color: var(--c-white); font-size: 1.4rem; margin-bottom: 10px; }
.proj-card p { color: var(--c-cloud); font-size: .9rem; margin-bottom: 16px; }
.proj-card__meta { display: flex; gap: 20px; border-top: 1px solid rgba(255,255,255,.15); padding-top: 16px; }
.proj-card__meta div small { display: block; color: var(--c-mist); font-size: .72rem; text-transform: uppercase; letter-spacing: .08em; }
.proj-card__meta div b { font-family: var(--font-display); color: var(--c-white); font-size: 1rem; }

/* ---------- 12. AI Danışman ---------- */
.ai { background: var(--c-white); color: var(--c-text); position: relative; overflow: hidden; }
.ai__glow { position: absolute; bottom: -20%; right: -5%; width: 45vw; height: 45vw; background: radial-gradient(circle, rgba(37,105,214,.10), transparent 65%); pointer-events: none; }
.ai__grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: 56px; align-items: center; position: relative; z-index: 1; }
.ai h2 { color: var(--c-ink); font-size: clamp(2rem, 4vw, 3rem); }
.ai__feat { display: grid; gap: 16px; margin: 30px 0; }
.ai__feat-item { display: flex; gap: 14px; align-items: flex-start; }
.ai__feat-item .ic { width: 42px; height: 42px; flex-shrink: 0; border-radius: 12px; background: rgba(37,105,214,.12); color: var(--c-gold-deep); display: grid; place-items: center; font-size: 1.05rem; }
.ai__feat-item b { color: var(--c-ink); font-family: var(--font-display); display: block; }
.ai__feat-item span { color: var(--c-text-soft); font-size: .92rem; }

/* Chat penceresi */
.chat {
  background: linear-gradient(160deg, #1b1f26, #14171c); border: 1px solid rgba(255,255,255,.1);
  border-radius: var(--radius-lg); box-shadow: var(--shadow-lg); overflow: hidden;
  display: flex; flex-direction: column; max-height: 560px;
}
.chat__head { display: flex; align-items: center; gap: 14px; padding: 18px 22px; background: rgba(255,255,255,.03); border-bottom: 1px solid rgba(255,255,255,.08); }
.chat__avatar { width: 46px; height: 46px; border-radius: 50%; background: linear-gradient(135deg, var(--c-gold), var(--c-gold-deep)); display: grid; place-items: center; color: var(--c-white); font-size: 1.3rem; position: relative; }
.chat__avatar::after { content: ""; position: absolute; right: 1px; bottom: 1px; width: 12px; height: 12px; border-radius: 50%; background: #34d399; border: 2px solid #191d23; }
.chat__title b { color: var(--c-white); font-family: var(--font-display); display: block; font-size: 1.05rem; }
.chat__title small { color: #34d399; font-size: .8rem; display: flex; align-items: center; gap: 6px; }
.chat__body { padding: 22px; display: flex; flex-direction: column; gap: 14px; overflow-y: auto; flex: 1; min-height: 280px; }
.msg { max-width: 82%; padding: 13px 17px; border-radius: 16px; font-size: .92rem; line-height: 1.55; animation: msgIn .4s var(--ease); }
@keyframes msgIn { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }
.msg--bot { align-self: flex-start; background: rgba(255,255,255,.07); color: var(--c-cloud); border-bottom-left-radius: 5px; }
.msg--user { align-self: flex-end; background: var(--c-gold); color: var(--c-white); border-bottom-right-radius: 5px; font-weight: 500; }
.msg--bot b { color: var(--c-gold-soft); }
.chat__typing { align-self: flex-start; display: flex; gap: 5px; padding: 14px 18px; background: rgba(255,255,255,.07); border-radius: 16px; }
.chat__typing span { width: 8px; height: 8px; border-radius: 50%; background: var(--c-mist); animation: blink 1.2s infinite; }
.chat__typing span:nth-child(2){animation-delay:.2s} .chat__typing span:nth-child(3){animation-delay:.4s}
@keyframes blink { 0%,60%,100%{opacity:.3;transform:translateY(0)} 30%{opacity:1;transform:translateY(-4px)} }
.chat__suggest { display: flex; flex-wrap: wrap; gap: 8px; padding: 0 22px 14px; }
.chat__suggest button { font-size: .82rem; padding: 8px 14px; border-radius: 999px; background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255,.14); color: var(--c-cloud); transition: border-color var(--t), background var(--t); }
.chat__suggest button:hover { border-color: var(--c-gold); background: rgba(37,105,214,.1); }
.chat__input { display: flex; gap: 10px; padding: 16px 22px; border-top: 1px solid rgba(255,255,255,.08); background: rgba(0,0,0,.2); }
.chat__input input { flex: 1; background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255,.12); border-radius: 999px; padding: 13px 20px; color: var(--c-white); outline: none; }
.chat__input input::placeholder { color: var(--c-mist); }
.chat__input input:focus { border-color: var(--c-gold); }
.chat__send { width: 48px; height: 48px; border-radius: 50%; background: var(--c-gold); color: var(--c-white); display: grid; place-items: center; font-size: 1.1rem; flex-shrink: 0; transition: transform var(--t); }
.chat__send:hover { transform: scale(1.06); }

/* ---------- 13. Neden Biz? ---------- */
.why__grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.why-card { padding: 32px 26px; border-radius: var(--radius); background: var(--c-white); border: 1px solid var(--c-line); transition: transform var(--t), box-shadow var(--t), border-color var(--t); }
.why-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); border-color: transparent; }
.why-card .ic { width: 56px; height: 56px; border-radius: 16px; background: linear-gradient(135deg, rgba(37,105,214,.16), rgba(37,105,214,.06)); color: var(--c-gold-deep); display: grid; place-items: center; font-size: 1.5rem; margin-bottom: 20px; }
.why-card h3 { font-size: 1.18rem; margin-bottom: 10px; }
.why-card p { color: var(--c-text-soft); font-size: .92rem; }

/* ---------- 14. SEO Şehirler ---------- */
.cities { position: relative; }
.cities__grid { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 40px; }
.city-link {
  display: inline-flex; align-items: center; gap: 9px; padding: 12px 20px; border-radius: 12px;
  background: var(--c-white); border: 1px solid var(--c-line); font-weight: 500;
  transition: transform var(--t), border-color var(--t), color var(--t), box-shadow var(--t);
}
.city-link i { color: var(--c-gold-deep); }
.city-link:hover { transform: translateY(-3px); border-color: var(--c-gold); box-shadow: var(--shadow-sm); color: var(--c-gold-deep); }
.cities__note { margin-top: 30px; color: var(--c-text-soft); font-size: .95rem; }

/* ---------- 15. Blog / Rehber ---------- */
.blog__grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.blog-card { background: var(--c-white); border: 1px solid var(--c-line); border-radius: var(--radius-lg); overflow: hidden; display: flex; flex-direction: column; transition: transform var(--t), box-shadow var(--t); }
.blog-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); }
.blog-card__media { aspect-ratio: 16/10; background-size: cover; background-position: center; position: relative; }
.blog-card__cat { position: absolute; top: 16px; left: 16px; background: rgba(14,16,19,.7); backdrop-filter: blur(6px); color: var(--c-white); font-size: .72rem; font-weight: 600; padding: 6px 12px; border-radius: 999px; text-transform: uppercase; letter-spacing: .06em; }
.blog-card__body { padding: 26px; display: flex; flex-direction: column; flex: 1; }
.blog-card__date { color: var(--c-concrete); font-size: .82rem; margin-bottom: 10px; }
.blog-card h3 { font-size: 1.22rem; margin-bottom: 12px; line-height: 1.3; }
.blog-card p { color: var(--c-text-soft); font-size: .9rem; margin-bottom: 18px; flex: 1; }

/* ---------- 16. SSS ---------- */
.faq__wrap { max-width: 860px; margin: 0 auto; display: grid; gap: 14px; }
.faq-item { border: 1px solid var(--c-line); border-radius: var(--radius); overflow: hidden; background: var(--c-white); transition: border-color var(--t), box-shadow var(--t); }
.faq-item.is-open { border-color: var(--c-gold); box-shadow: var(--shadow-sm); }
.faq-item__q { width: 100%; display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 24px 26px; text-align: left; font-family: var(--font-display); font-weight: 600; font-size: 1.08rem; color: var(--c-ink); }
.faq-item__q i { color: var(--c-gold-deep); transition: transform var(--t); flex-shrink: 0; }
.faq-item.is-open .faq-item__q i { transform: rotate(45deg); }
.faq-item__a { max-height: 0; overflow: hidden; transition: max-height .45s var(--ease); }
.faq-item__a p { padding: 0 26px 26px; color: var(--c-text-soft); }

/* ---------- 17. İletişim & Form ---------- */
.contact { background: var(--c-paper); color: var(--c-text); position: relative; overflow: hidden; }
.contact__glow { position: absolute; top: -10%; left: 30%; width: 40vw; height: 40vw; background: radial-gradient(circle, rgba(37,105,214,.08), transparent 65%); pointer-events: none; }
.contact__grid { display: grid; grid-template-columns: .95fr 1.05fr; gap: 60px; align-items: start; position: relative; z-index: 1; }
.contact h2 { color: var(--c-ink); font-size: clamp(2rem, 4vw, 3rem); }
.contact__list { display: grid; gap: 20px; margin: 34px 0; }
.contact__item { display: flex; gap: 16px; align-items: center; }
.contact__item .ic { width: 52px; height: 52px; border-radius: 14px; background: rgba(37,105,214,.12); color: var(--c-gold-deep); display: grid; place-items: center; font-size: 1.25rem; flex-shrink: 0; }
.contact__item small { color: var(--c-text-soft); display: block; font-size: .82rem; }
.contact__item b { color: var(--c-ink); font-family: var(--font-display); font-size: 1.1rem; }
.contact__quick { display: flex; flex-wrap: wrap; gap: 12px; }

.form { background: var(--c-white); border-radius: var(--radius-lg); padding: 40px; box-shadow: var(--shadow-lg); }
.form h3 { color: var(--c-ink); font-size: 1.5rem; margin-bottom: 6px; }
.form__note { color: var(--c-text-soft); font-size: .92rem; margin-bottom: 26px; }
.form__grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.field { display: flex; flex-direction: column; gap: 8px; }
.field--full { grid-column: span 2; }
.field label { font-size: .86rem; font-weight: 600; color: var(--c-ink); }
.field label .req { color: var(--c-gold-deep); }
.field input, .field select, .field textarea {
  padding: 14px 16px; border: 1.5px solid var(--c-line); border-radius: 12px; background: var(--c-paper);
  color: var(--c-text); outline: none; transition: border-color var(--t), background var(--t);
}
.field input:focus, .field select:focus, .field textarea:focus { border-color: var(--c-gold); background: var(--c-white); }
.field textarea { resize: vertical; min-height: 110px; }
.form__submit { margin-top: 24px; }
.form__ok { display: none; margin-top: 18px; padding: 16px; border-radius: 12px; background: rgba(52,211,153,.12); border: 1px solid rgba(52,211,153,.4); color: #0f9d6b; font-weight: 500; align-items: center; gap: 10px; }
.form__ok.is-visible { display: flex; }

/* ---------- 18. Footer ---------- */
.footer { background: var(--c-white); color: var(--c-text-soft); padding: 80px 0 0; border-top: 1px solid var(--c-line); }
.footer__grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: 40px; padding-bottom: 56px; }
.footer__about p { margin: 20px 0; max-width: 34ch; font-size: .92rem; }
.footer__social { display: flex; gap: 12px; }
.footer__social a { width: 42px; height: 42px; border-radius: 12px; background: rgba(14,16,19,.045); color: var(--c-ink); display: grid; place-items: center; transition: background var(--t), color var(--t), transform var(--t); }
.footer__social a:hover { background: var(--c-gold); color: var(--c-white); transform: translateY(-3px); }
.footer h4 { color: var(--c-ink); font-size: 1.05rem; margin-bottom: 20px; }
.footer__links { display: grid; gap: 12px; }
.footer__links a { font-size: .92rem; transition: color var(--t), padding var(--t); }
.footer__links a:hover { color: var(--c-gold-deep); padding-left: 5px; }
.footer__bottom { border-top: 1px solid var(--c-line); padding: 26px 0; display: flex; align-items: center; justify-content: space-between; gap: 20px; flex-wrap: wrap; font-size: .85rem; }
.footer__bottom a:hover { color: var(--c-gold-deep); }

/* ---------- 19. Mobil Hızlı Aksiyon Barı ---------- */
.mobile-bar { display: none; position: fixed; bottom: 0; left: 0; right: 0; z-index: 900; background: rgba(255,255,255,.96); backdrop-filter: blur(14px); border-top: 1px solid var(--c-line); box-shadow: 0 -8px 30px rgba(14,16,19,.08); padding: 8px; grid-template-columns: repeat(4,1fr); gap: 6px; }
.mobile-bar a { display: flex; flex-direction: column; align-items: center; gap: 4px; padding: 8px 4px; border-radius: 12px; color: var(--c-ink); font-size: .68rem; font-weight: 600; transition: background var(--t); }
.mobile-bar a i { font-size: 1.15rem; }
.mobile-bar a.is-wa i { color: #1da851; }
.mobile-bar a.is-call i { color: #0e8ecb; }
.mobile-bar a.is-quote { background: var(--c-gold); color: var(--c-white); }
.mobile-bar a.is-ai i { color: var(--c-gold-deep); }

/* ---------- 20. Hizmet Detay Sayfası ---------- */
.page-hero { position: relative; padding: 180px 0 90px; background: linear-gradient(120deg, #f7f8fa, #eceef2); overflow: hidden; color: var(--c-text); }
.page-hero__bg { position: absolute; inset: 0; background-size: cover; background-position: right center; z-index: 0; }
.page-hero__bg::after { content: ""; position: absolute; inset: 0; background: linear-gradient(100deg, #f7f8fa 0%, #f7f8fa 40%, rgba(247,248,250,.6) 66%, rgba(247,248,250,.15) 100%); }
.page-hero .container { position: relative; z-index: 1; }
.crumbs { display: flex; align-items: center; gap: 10px; color: var(--c-concrete); font-size: .88rem; margin-bottom: 24px; }
.crumbs a:hover { color: var(--c-gold-deep); }
.crumbs i { font-size: .6rem; }
.page-hero h1 { color: var(--c-ink); font-size: clamp(2.2rem, 5vw, 3.6rem); max-width: 20ch; margin-bottom: 20px; }
.page-hero h1 span { color: var(--c-gold-deep); }
.page-hero p { color: var(--c-text-soft); font-size: 1.15rem; max-width: 60ch; margin-bottom: 30px; }
.page-hero__cta { display: flex; flex-wrap: wrap; gap: 14px; }

.prose { max-width: 760px; }
.prose h2 { font-size: clamp(1.7rem, 3.4vw, 2.4rem); margin: 0 0 18px; }
.prose h3 { font-size: 1.4rem; margin: 30px 0 12px; }
.prose p { color: var(--c-text-soft); margin-bottom: 18px; font-size: 1.05rem; }

.split { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.split__media { border-radius: var(--radius-lg); overflow: hidden; aspect-ratio: 4/3; background-size: cover; background-position: center; box-shadow: var(--shadow); }

.feature-list { display: grid; gap: 14px; margin-top: 10px; }
.feature-list li { display: flex; gap: 14px; align-items: flex-start; color: var(--c-text-soft); }
.feature-list li i { color: var(--c-gold-deep); margin-top: 4px; flex-shrink: 0; }
.feature-list li b { color: var(--c-ink); font-family: var(--font-display); }
.section--dark .feature-list li { color: var(--c-text-soft); }
.section--dark .feature-list li b { color: var(--c-ink); }
.section--dark .feature-list li i { color: var(--c-gold-deep); }

/* Uygulama aşamaları — timeline */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; counter-reset: step; }
.step { position: relative; padding-top: 20px; }
.step__num { font-family: var(--font-display); font-weight: 800; font-size: 2.4rem; color: var(--c-gold); line-height: 1; margin-bottom: 14px; }
.step h3 { font-size: 1.15rem; margin-bottom: 8px; }
.step p { color: var(--c-text-soft); font-size: .92rem; }
.section--dark .step p { color: var(--c-mist); }
.step::before { content: ""; position: absolute; top: 0; left: 0; width: 46px; height: 3px; background: var(--c-gold-deep); border-radius: 3px; }

/* Sektörel çözüm kartları */
.sectors { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.sector-card { padding: 30px; border-radius: var(--radius); border: 1px solid var(--c-line); background: var(--c-white); transition: transform var(--t), box-shadow var(--t); }
.sector-card:hover { transform: translateY(-5px); box-shadow: var(--shadow); }
.sector-card .ic { font-size: 1.6rem; color: var(--c-gold-deep); margin-bottom: 16px; }
.sector-card h3 { font-size: 1.2rem; margin-bottom: 8px; }
.sector-card p { color: var(--c-text-soft); font-size: .92rem; }

/* Galeri */
.gallery { display: grid; grid-template-columns: repeat(4, 1fr); grid-auto-rows: 200px; gap: 16px; }
.gallery__item { border-radius: var(--radius); overflow: hidden; background-size: cover; background-position: center; position: relative; cursor: pointer; transition: transform var(--t); }
.gallery__item::after { content: "\f00e"; font-family: "Font Awesome 6 Free"; font-weight: 900; position: absolute; inset: 0; display: grid; place-items: center; color: var(--c-white); background: rgba(14,16,19,.4); opacity: 0; transition: opacity var(--t); font-size: 1.4rem; }
.gallery__item:hover::after { opacity: 1; }
.gallery__item:hover { transform: scale(.98); }
.gallery__item--wide { grid-column: span 2; }
.gallery__item--tall { grid-row: span 2; }

/* CTA bandı */
.cta-band { background: linear-gradient(120deg, var(--c-gold-deep), var(--c-gold)); color: var(--c-white); border-radius: var(--radius-lg); padding: 56px; display: flex; align-items: center; justify-content: space-between; gap: 40px; flex-wrap: wrap; }
.cta-band h2 { color: var(--c-white); font-size: clamp(1.7rem, 3.4vw, 2.4rem); max-width: 22ch; }
.cta-band p { color: rgba(255,255,255,.85); margin-top: 10px; }

/* Referans filtre butonları */
.filters { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; margin-bottom: 44px; }
.filter-btn {
  padding: 11px 22px; border-radius: 999px; font-family: var(--font-display); font-weight: 600; font-size: .92rem;
  background: var(--c-white); border: 1.5px solid var(--c-line); color: var(--c-text-soft);
  transition: color var(--t), border-color var(--t), background var(--t), box-shadow var(--t);
}
.filter-btn:hover { border-color: var(--c-gold); color: var(--c-gold-deep); }
.filter-btn.is-active { background: var(--c-gold); border-color: var(--c-gold); color: var(--c-white); box-shadow: var(--shadow-gold); }
.proj-card.is-hidden { display: none; }

/* Harita */
.map-wrap { border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow); border: 1px solid var(--c-line); line-height: 0; }
.map-wrap iframe { width: 100%; height: 440px; border: 0; display: block; filter: grayscale(.2) contrast(1.05); }

/* ---------- 21. Animasyonlar ---------- */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
.reveal.is-in { opacity: 1; transform: translateY(0); }
.reveal[data-delay="1"] { transition-delay: .08s; }
.reveal[data-delay="2"] { transition-delay: .16s; }
.reveal[data-delay="3"] { transition-delay: .24s; }
.reveal[data-delay="4"] { transition-delay: .32s; }
@media (prefers-reduced-motion: reduce) { .reveal { opacity: 1; transform: none; } * { animation: none !important; } }

/* ---------- 22. Responsive ---------- */
@media (max-width: 1320px) {
  .nav__phone { display: none; }
}
@media (max-width: 1100px) {
  .epoxy__systems { grid-template-columns: repeat(3, 1fr); }
  .stats__grid { grid-template-columns: repeat(3, 1fr); gap: 30px 12px; }
  .stat:nth-child(3)::after { display: none; }
  .why__grid { grid-template-columns: repeat(2, 1fr); }
  .gallery { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 980px) {
  .nav__menu, .nav__phone { display: none; }
  .nav__toggle { display: flex; }
  .hero__grid, .epoxy__top, .ai__grid, .contact__grid, .split { grid-template-columns: 1fr; }
  .hero__visual { display: none; }
  .projects__grid, .blog__grid, .sectors { grid-template-columns: repeat(2, 1fr); }
  .sec-head.is-split { flex-direction: column; align-items: flex-start; }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .footer__grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 720px) {
  .section { padding: 72px 0; }
  .services__grid, .projects__grid, .blog__grid, .sectors { grid-template-columns: 1fr; }
  .svc-card--feature { grid-column: span 1; flex-direction: column; }
  .svc-card--feature .svc-card__media { min-height: 220px; }
  .epoxy__systems { grid-template-columns: 1fr 1fr; }
  .epoxy__top, .contact__grid { gap: 36px; }
  .form { padding: 28px; }
  .form__grid { grid-template-columns: 1fr; }
  .field--full { grid-column: span 1; }
  .why__grid { grid-template-columns: 1fr; }
  .footer__grid { grid-template-columns: 1fr; }
  .cta-band { padding: 36px 28px; }
  .mobile-bar { display: grid; }
  body { padding-bottom: 76px; }
  .hero { min-height: auto; padding: 130px 0 70px; }
  .gallery { grid-template-columns: 1fr 1fr; grid-auto-rows: 150px; }
  .gallery__item--wide { grid-column: span 2; }
  .stats__grid { grid-template-columns: 1fr 1fr; }
  .stat:nth-child(3)::after { display: block; }
  .stat:nth-child(2)::after, .stat:nth-child(4)::after { display: none; }
}
@media (max-width: 420px) {
  .epoxy__systems { grid-template-columns: 1fr; }
  .hero__mini { gap: 16px; }
}