/* ==========================================================================
   Sanayi Isıtma / Nemark — style.css
   Font: Google Open Sans
   ========================================================================== */

:root{
  --renk-ana: #0b3d62;
  --renk-vurgu: #f4831f;
  --renk-vurgu-koyu: #d96c0f;
  --renk-yazi: #23303c;
  --renk-gri: #6b7684;
  --renk-acik-zemin: #f5f7fa;
  --renk-beyaz: #ffffff;
  --radius: 10px;
  --golge: 0 4px 18px rgba(11,61,98,0.10);
  --gecis: all .25s ease;
}

*{ box-sizing:border-box; }
html{ scroll-behavior:smooth; }
body{
  margin:0;
  font-family:'Open Sans', Arial, sans-serif;
  color:var(--renk-yazi);
  background:var(--renk-beyaz);
  line-height:1.65;
  font-size:16px;
}
img{ max-width:100%; height:auto; display:block; }
a{ color:var(--renk-ana); text-decoration:none; transition:var(--gecis); }
a:hover{ color:var(--renk-vurgu); }
ul{ margin:0; padding:0; list-style:none; }
h1,h2,h3,h4{ color:var(--renk-ana); line-height:1.3; margin:0 0 14px; }
h1{ font-size:2.1rem; font-weight:800; }
h2{ font-size:1.6rem; font-weight:700; }
h3{ font-size:1.25rem; font-weight:700; }
p{ margin:0 0 16px; color:var(--renk-yazi); }
.container{ max-width:1180px; margin:0 auto; padding:0 20px; }

/* ---------- Header ---------- */
.header-top{ background:var(--renk-ana); color:#fff; font-size:.85rem; }
.header-top-inner{ display:flex; justify-content:flex-end; gap:20px; padding:6px 20px; }
.header-top a{ color:#fff; }
.header-top a:hover{ color:var(--renk-vurgu); }

.site-header{ box-shadow:var(--golge); position:sticky; top:0; background:#fff; z-index:100; }
.header-main{ display:flex; align-items:center; justify-content:space-between; padding:14px 20px; }
.logo{ display:flex; align-items:center; gap:10px; }
.logo img{ height:40px; width:auto; }
.site-adi{ font-weight:800; color:var(--renk-ana); font-size:1.1rem; }

.ana-menu > ul{ display:flex; align-items:center; gap:28px; }
.ana-menu > ul > li > a{ font-weight:600; color:var(--renk-ana); padding:8px 0; display:block; }
.ana-menu .dropdown{ position:relative; }
.dropdown-toggle .ok{ display:inline-block; transition:transform .2s ease; font-size:.75em; }
.dropdown.acik .dropdown-toggle .ok{ transform:rotate(180deg); }
.dropdown-menu{
  display:none; position:absolute; top:100%; left:0; background:#fff;
  min-width:260px; box-shadow:var(--golge); border-radius:var(--radius);
  padding:10px 0; max-height:420px; overflow-y:auto; border:1px solid #eef1f4;
}
.dropdown.acik .dropdown-menu{ display:block; }
.dropdown-menu li a{ display:block; padding:8px 18px; color:var(--renk-yazi); font-weight:500; }
.dropdown-menu li a:hover{ background:var(--renk-acik-zemin); color:var(--renk-vurgu); }
.dropdown-menu-tumu{ border-bottom:1px solid #eef1f4; margin-bottom:6px; }
.dropdown-menu-tumu a{ color:var(--renk-vurgu-koyu) !important; }

.mobil-menu-btn{ display:none; flex-direction:column; gap:5px; background:none; border:none; cursor:pointer; padding:6px; position:relative; z-index:200; }
.mobil-menu-btn span{ width:26px; height:3px; background:var(--renk-ana); border-radius:2px; transition:var(--gecis); }

/* ---------- Banner / Slider ---------- */
.banner-slider{ position:relative; overflow:hidden; height:520px; background:var(--renk-ana); }
.banner-slide{
  position:absolute; inset:0; display:flex; align-items:center; justify-content:center;
  opacity:0; transition:opacity .8s ease; background-size:cover; background-position:center;
  padding:40px 0;
}
.banner-slide.aktif{ opacity:1; z-index:2; }
.banner-slide::before{ content:''; position:absolute; inset:0; background:linear-gradient(180deg, rgba(6,30,49,.75) 0%, rgba(11,61,98,.72) 55%, rgba(11,61,98,.85) 100%); }
.banner-icerik{ position:relative; z-index:2; text-align:center; color:#fff; max-width:820px; padding:20px 20px; }
.banner-icerik .eyebrow{ display:inline-block; text-transform:uppercase; letter-spacing:2px; font-size:.85rem; font-weight:800; color:#ffd8ac; background:rgba(255,255,255,.12); border:1px solid rgba(255,216,172,.4); padding:7px 18px; border-radius:24px; margin-bottom:18px; }
.banner-icerik h1{ color:#fff; font-size:2.9rem; font-weight:800; line-height:1.15; margin-bottom:16px; }
.banner-icerik p{ color:#e8f0f7; font-size:1.1rem; }
.banner-dots{ position:absolute; bottom:18px; left:0; right:0; display:flex; justify-content:center; gap:8px; z-index:3; }
.banner-dots button{ width:11px; height:11px; border-radius:50%; border:2px solid #fff; background:transparent; cursor:pointer; }
.banner-dots button.aktif{ background:#fff; }

/* ---------- Butonlar ---------- */
.btn{ display:inline-block; padding:13px 26px; border-radius:var(--radius); font-weight:700; transition:var(--gecis); }
.btn-vurgu{ background:var(--renk-vurgu); color:#fff; }
.btn-vurgu:hover{ background:var(--renk-vurgu-koyu); color:#fff; }
.btn-outline{ border:2px solid #fff; color:#fff; }
.btn-outline:hover{ background:#fff; color:var(--renk-ana); }
.cta-grup{ display:flex; gap:14px; justify-content:center; margin-top:22px; flex-wrap:wrap; }

/* ---------- Bölümler ---------- */
section{ padding:56px 0; }
.section-baslik{ text-align:center; max-width:720px; margin:0 auto 40px; }
.section-baslik .eyebrow{ display:inline-block; text-transform:uppercase; letter-spacing:1.5px; font-size:.8rem; font-weight:800; color:var(--renk-vurgu); background:rgba(244,131,31,.1); padding:6px 16px; border-radius:20px; margin-bottom:14px; }
.section-baslik h2{ font-size:2rem; }
.bg-acik{ background:var(--renk-acik-zemin); }

/* İstatistik / Sayaç bölümü */
.istatistik-bolumu{ background:var(--renk-ana); color:#fff; }
.istatistik-grid{ display:grid; grid-template-columns:repeat(auto-fit,minmax(160px,1fr)); gap:24px; text-align:center; }
.istatistik-item .sayi{ font-size:2.6rem; font-weight:800; color:var(--renk-vurgu); line-height:1; margin-bottom:8px; }
.istatistik-item .etiket{ color:#c3d4e0; font-weight:600; font-size:.95rem; }

/* Kartlar */
.kart-grid{ display:grid; grid-template-columns:repeat(auto-fit,minmax(250px,1fr)); gap:22px; }
.kart{ background:#fff; border-radius:var(--radius); box-shadow:var(--golge); padding:26px; transition:var(--gecis); border-top:3px solid transparent; }
.kart:hover{ transform:translateY(-6px); border-top-color:var(--renk-vurgu); box-shadow:0 14px 30px rgba(11,61,98,.16); }
.kart h3{ margin-bottom:8px; }
.kart h3 a{ color:var(--renk-ana); }
.kart:hover h3 a{ color:var(--renk-vurgu-koyu); }

/* Ürün görselleri */
.urun-grid{ display:grid; grid-template-columns:repeat(auto-fit,minmax(200px,1fr)); gap:20px; }
.urun-kart{ background:#fff; border:1px solid #e7ecf1; border-radius:var(--radius); overflow:hidden; text-align:center; transition:var(--gecis); }
.urun-kart:hover{ box-shadow:var(--golge); transform:translateY(-3px); }
.urun-kart img{ padding:16px; width:100%; height:auto; object-fit:contain; aspect-ratio:1/1; }
.urun-kart .urun-ad{ padding:10px 12px 18px; font-weight:700; color:var(--renk-ana); }
.urun-kart h2, .urun-kart h3{ margin:0 12px 6px; font-size:1.02rem; color:var(--renk-ana); }
.urun-kart .urun-guc{ display:inline-block; margin-bottom:10px; padding:3px 12px; border-radius:20px; background:var(--renk-acik-zemin); font-size:.85rem; font-weight:700; color:var(--renk-vurgu-koyu); }
.urun-kart p{ padding:0 16px; font-size:.92rem; color:#57626b; }
.urun-kart .cta-grup{ padding:16px; margin-top:4px; }
.urun-kart a{ text-decoration:none; display:block; }
.urun-grid-buyuk{ grid-template-columns:repeat(auto-fit,minmax(260px,1fr)); }
.urun-grid-buyuk .urun-kart{ text-align:center; }
.btn-kucuk{ padding:9px 16px; font-size:.85rem; }
.urun-bolumu{ background:#fff; }
.urun-bolumu .btn-outline{ border-color:var(--renk-ana); color:var(--renk-ana); }
.urun-bolumu .btn-outline:hover{ background:var(--renk-ana); color:#fff; }

/* Breadcrumb */
.breadcrumb{ background:var(--renk-acik-zemin); padding:12px 0; }
.breadcrumb ol{ list-style:none; display:flex; flex-wrap:wrap; gap:6px; max-width:1180px; margin:0 auto; padding:0 20px; font-size:.9rem; color:var(--renk-gri); }
.breadcrumb li{ list-style:none; }
.breadcrumb li a{ color:var(--renk-gri); }
.breadcrumb li a:hover{ color:var(--renk-vurgu); }
.breadcrumb li[aria-current="page"]{ color:var(--renk-ana); font-weight:600; }
.breadcrumb li:not(:last-child)::after{ content:'›'; margin-left:6px; color:var(--renk-gri); }

/* FAQ Accordion */
.faq-list{ max-width:820px; margin:0 auto; }
.faq-item{ border-bottom:1px solid #e7ecf1; }
.faq-soru{ width:100%; text-align:left; background:none; border:none; padding:18px 6px; font-weight:700; font-size:1.02rem; color:var(--renk-ana); cursor:pointer; display:flex; justify-content:space-between; align-items:center; }
.faq-soru::after{ content:'+'; font-size:1.4rem; color:var(--renk-vurgu); }
.faq-item.acik .faq-soru::after{ content:'–'; }
.faq-cevap{ display:none; padding:0 6px 18px; color:var(--renk-gri); }
.faq-item.acik .faq-cevap{ display:block; }

/* Proje süreci */
.surec-grid{ display:grid; grid-template-columns:repeat(auto-fit,minmax(220px,1fr)); gap:24px; counter-reset:surec; }
.surec-adim{ text-align:center; position:relative; padding-top:16px; }
.surec-adim::before{ counter-increment:surec; content:counter(surec); display:inline-flex; align-items:center; justify-content:center; width:44px; height:44px; border-radius:50%; background:var(--renk-vurgu); color:#fff; font-weight:800; margin-bottom:14px; }

/* İç linkleme blokları */
.il-grid, .ilce-grid{ display:grid; grid-template-columns:repeat(auto-fill,minmax(150px,1fr)); gap:8px; margin-top:16px; }
.il-grid a, .ilce-grid a{ background:var(--renk-acik-zemin); padding:9px 12px; border-radius:6px; font-size:.9rem; font-weight:600; }
.il-grid a.aktif, .ilce-grid a.aktif{ background:var(--renk-ana); color:#fff; }
.tum-iller, .ilce-linkleri{ margin-top:48px; padding-top:36px; border-top:1px solid #e7ecf1; }
.ilgili-hizmetler ul{ display:flex; flex-wrap:wrap; gap:10px; margin-top:14px; }
.ilgili-hizmetler li a{ background:#fff; border:1px solid #e7ecf1; padding:8px 14px; border-radius:20px; font-size:.88rem; font-weight:600; }

/* Makale */
.makale{ max-width:820px; margin:0 auto; }
.makale h2{ margin-top:38px; }

/* İletişim formu / bilgiler */
.iletisim-grid{ display:grid; grid-template-columns:1fr 1fr; gap:36px; }
.iletisim-kart{ background:var(--renk-acik-zemin); border-radius:var(--radius); padding:24px; }

/* WhatsApp float */
/* ============================================================
   STICKY İLETİŞİM ÇUBUĞU — Premium Mobil Tasarım
   ============================================================ */
.sticky-contact {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    display: none; /* Masaüstünde gizli, sadece mobilde görünür */
    z-index: 9999;
    padding: 10px 12px calc(10px + env(safe-area-inset-bottom));
    background: linear-gradient(180deg, rgba(255,255,255,0) 0%, rgba(255,255,255,.96) 22%);
}

.sticky-contact-inner {
    display: flex;
    align-items: stretch;
    max-width: 520px;
    margin: 0 auto;
    background: rgba(23, 35, 60, 0.92);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-radius: 18px;
    overflow: hidden;
    box-shadow: 0 10px 34px rgba(15, 22, 40, 0.35), 0 2px 8px rgba(0,0,0,.15);
    border: 1px solid rgba(255,255,255,0.08);
    animation: sticky-rise 0.5s cubic-bezier(.2,.8,.2,1) both;
}

@keyframes sticky-rise {
    from { transform: translateY(24px); opacity: 0; }
    to   { transform: translateY(0);    opacity: 1; }
}

.contact-btn {
    position: relative;
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 9px;
    padding: 15px 12px;
    font-family: 'Open Sans', sans-serif;
    font-size: 15px;
    font-weight: 700;
    letter-spacing: 0.3px;
    text-decoration: none;
    color: #fff;
    border: none;
    cursor: pointer;
    transition: background .25s ease, transform .15s ease;
    -webkit-tap-highlight-color: transparent;
}

.contact-btn:active { transform: scale(0.97); }

/* Ortadaki ince ayraç çizgisi */
.contact-btn.btn-call::after {
    content: '';
    position: absolute;
    right: 0; top: 20%; bottom: 20%;
    width: 1px;
    background: rgba(255,255,255,0.14);
}

.btn-call {
    background: transparent;
}
.btn-call:hover { background: rgba(255,255,255,0.06); }

.btn-whatsapp {
    background: linear-gradient(135deg, #22c55e, #16a34a);
}
.btn-whatsapp:hover { background: linear-gradient(135deg, #16a34a, #128a3e); }

.btn-icon-wrap {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    background: rgba(255,255,255,0.14);
    flex-shrink: 0;
}
.btn-whatsapp .btn-icon-wrap { background: rgba(255,255,255,0.22); }

.btn-icon {
    width: 16px;
    height: 16px;
    fill: currentColor;
}

/* Telefon ikonuna nazik dikkat-çekici nabız (agresif değil) */
.btn-call .btn-icon-wrap {
    animation: icon-pulse 2.6s ease-in-out infinite;
}
@keyframes icon-pulse {
    0%, 100% { box-shadow: 0 0 0 0 rgba(217, 73, 31, 0.55); }
    50%      { box-shadow: 0 0 0 7px rgba(217, 73, 31, 0); }
}

.contact-btn .btn-label { line-height: 1; }
.contact-btn .btn-sub {
    display: block;
    font-size: 10.5px;
    font-weight: 500;
    opacity: .75;
    letter-spacing: 0.4px;
    margin-top: 1px;
}

/* Sadece mobilde göster */
@media (max-width: 768px) {
    .sticky-contact { display: block; }
    body { padding-bottom: 78px; } /* içerik çubuğun altında kalmasın */
}

@media (max-width: 380px) {
    .contact-btn { font-size: 13.5px; padding: 13px 8px; gap: 7px; }
    .btn-icon-wrap { width: 26px; height: 26px; }
    .btn-icon { width: 14px; height: 14px; }
    .contact-btn .btn-sub { display: none; }
}

/* Footer */
.site-footer{ background:var(--renk-ana); color:#dbe6ee; margin-top:60px; }
.footer-grid{ display:grid; grid-template-columns:1.3fr 1fr 1.2fr; gap:30px; padding:50px 20px 30px; }
.footer-col h4{ color:#fff; margin-bottom:14px; }
.footer-col ul li{ margin-bottom:8px; }
.footer-col a{ color:#c3d4e0; }
.footer-col a:hover{ color:#fff; }
.footer-alt{ border-top:1px solid rgba(255,255,255,.15); padding:16px 0; text-align:center; font-size:.85rem; color:#9fb4c4; }

/* Genel yardımcı */
.text-center{ text-align:center; }
.mt-0{ margin-top:0; }