/* =========================================================
   COS KİMYA — Endüstriyel Kimya Sitesi
   TEMA: Dark Gümüş
   Koyu çelik zemin + gümüş aksanlar + kimya ikonları
   ========================================================= */

:root {
  /* Dark Gümüş Konsepti */
  --silver: #C0C7D1;
  --silver-light: #E8ECF2;
  --silver-dark: #8B93A0;
  --silver-pale: #D5DBE3;

  --bg-0: #0A0C10;                /* En koyu - body */
  --bg-1: #0F1218;                /* Bölüm arka planı */
  --bg-2: #151A22;                /* Kart arka planı */
  --bg-3: #1C222C;                /* Hover kart */

  --text-main: #E8EBF0;           /* Ana metin - buz beyazı */
  --text-muted: #9AA3B0;          /* İkincil metin */
  --text-soft: #667085;           /* Üçüncül metin */

  --border-dark: #232B36;
  --border-silver: rgba(192, 199, 209, 0.35);

  --shadow: 0 8px 30px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.65);
  --glow-silver: 0 6px 24px rgba(192, 199, 209, 0.18);

  --radius: 12px;
  --radius-sm: 8px;

  --font-head: 'Montserrat', sans-serif;
  --font-body: 'Inter', sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background: var(--bg-0);
  color: var(--text-main);
  line-height: 1.6;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
button { font-family: inherit; cursor: pointer; }
svg { display: inline-block; vertical-align: middle; }

.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ================= KİMYA İKONLARI ================= */
.ci {
  width: 34px;
  height: 34px;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.6;
  stroke-linecap: round;
  stroke-linejoin: round;
  color: var(--silver);
}

.ci-sm { width: 22px; height: 22px; }
.ci-lg { width: 44px; height: 44px; }
.ci-xl { width: 56px; height: 56px; }

.icon-chip {
  width: 64px;
  height: 64px;
  border: 1px solid var(--border-silver);
  background: var(--bg-2);
  border-radius: 14px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--silver);
  margin-bottom: 14px;
  transition: background .25s, border-color .25s;
}

.icon-chip .ci { width: 34px; height: 34px; }

.card:hover .icon-chip {
  background: var(--bg-3);
  border-color: var(--silver);
}

/* ================= ÜST ŞERİT ================= */
.topbar {
  background: var(--bg-0);
  border-bottom: 1px solid var(--border-dark);
  color: var(--text-muted);
  font-size: 13px;
  padding: 10px 0;
  position: relative;
  z-index: 105;
}

.topbar::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--silver-dark), transparent);
}

.topbar-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.topbar-left { display: flex; gap: 28px; align-items: center; flex-wrap: wrap; }

.topbar-left a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: color .2s;
}

.topbar-left a:hover { color: var(--silver-light); }
.topbar-icon { display: flex; color: var(--silver); }

.topbar-right { display: flex; align-items: center; gap: 16px; }

.topbar-badge {
  border: 1px solid var(--border-silver);
  color: var(--silver-light);
  padding: 3px 14px;
  border-radius: 20px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .8px;
  text-transform: uppercase;
}

.topbar-social {
  width: 26px;
  height: 26px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border-dark);
  border-radius: 6px;
  font-size: 11px;
  font-weight: 700;
  color: var(--text-muted);
  transition: all .2s;
}

.topbar-social:hover {
  border-color: var(--silver);
  color: var(--silver);
  box-shadow: var(--glow-silver);
}

/* ================= HEADER ================= */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 12, 16, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-dark);
  transition: box-shadow .3s;
}

.site-header.scrolled {
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.6);
}

.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 24px;
  gap: 24px;
}

.brand-logo { height: 56px; width: auto; transition: transform .25s; }
.brand-logo:hover { transform: scale(1.04); }

/* Menü ortada */
.main-nav {
  display: flex;
  align-items: center;
  gap: 2px;
  flex: 1;
  justify-content: center;
}

.nav-link {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-muted);
  padding: 10px 16px;
  border-radius: var(--radius-sm);
  position: relative;
  letter-spacing: .3px;
  transition: color .2s, background .2s;
  white-space: nowrap;
}

.nav-link:hover { color: var(--silver-light); background: rgba(192, 199, 209, .07); }

.nav-link.active { color: var(--silver); font-weight: 600; }

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: 4px;
  left: 16px;
  right: 16px;
  height: 2px;
  border-radius: 2px;
  background: var(--silver);
  box-shadow: 0 0 8px rgba(192, 199, 209, .5);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* Dil değiştirici */
.lang-switch {
  display: flex;
  align-items: center;
  border: 1px solid var(--border-dark);
  border-radius: 6px;
  overflow: hidden;
  background: var(--bg-2);
}

.lang-switch button {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 13px;
  font-weight: 700;
  padding: 8px 12px;
  transition: all .2s;
  font-family: var(--font-body);
}

.lang-switch button + button { border-left: 1px solid var(--border-dark); }

.lang-switch button:hover { color: var(--silver-light); }

.lang-switch button.active {
  background: linear-gradient(135deg, var(--silver-dark), var(--silver));
  color: #0B0E14;
}

.header-phone {
  display: none;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-main);
}

.header-phone .ci { color: var(--silver); }
.header-phone a { color: var(--silver-light); }

.btn-quote {
  background: linear-gradient(135deg, var(--silver-dark), var(--silver) 60%, var(--silver-light));
  color: #0B0E14;
  font-weight: 700;
  font-size: 14px;
  padding: 11px 24px;
  border-radius: var(--radius-sm);
  border: none;
  letter-spacing: .4px;
  transition: transform .2s, box-shadow .2s;
  box-shadow: var(--glow-silver);
  white-space: nowrap;
}

.btn-quote:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(192, 199, 209, .35);
}

.btn-quote.active {
  box-shadow: 0 0 0 2px #0B0E14 inset, 0 8px 28px rgba(192, 199, 209, .4);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  padding: 8px;
}

.nav-toggle span {
  width: 26px;
  height: 2px;
  background: var(--silver);
  border-radius: 2px;
  transition: transform .3s, opacity .3s;
}

.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ================= HERO SLIDER ================= */
.hero {
  position: relative;
  min-height: 92vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: var(--bg-0);
}

.hero-video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 20% 80%, rgba(192, 199, 209, .08) 0%, transparent 55%),
    linear-gradient(90deg, rgba(10, 12, 16, .94) 0%, rgba(10, 12, 16, .72) 40%, rgba(10, 12, 16, .35) 100%);
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  color: var(--text-main);
  max-width: 760px;
  padding: 120px 24px;
  animation: heroIn .9s ease-out both;
}

@keyframes heroIn {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

.hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--silver-light);
  font-weight: 600;
  font-size: 12px;
  letter-spacing: 3px;
  padding: 7px 18px;
  border: 1px solid var(--border-silver);
  border-radius: 30px;
  margin-bottom: 24px;
  text-transform: uppercase;
  background: rgba(192, 199, 209, .06);
}

.hero-kicker::before {
  content: '';
  width: 6px;
  height: 6px;
  background: var(--silver);
  border-radius: 50%;
  box-shadow: 0 0 10px rgba(192, 199, 209, .8);
}

.hero-title {
  font-family: var(--font-head);
  font-size: 62px;
  font-weight: 700;
  line-height: 1.08;
  text-transform: uppercase;
  margin-bottom: 22px;
  letter-spacing: .5px;
}

.hero-highlight {
  color: var(--silver);
  text-shadow: 0 0 40px rgba(192, 199, 209, .3);
}

.hero-subtitle {
  font-size: 17px;
  color: rgba(232, 235, 240, .75);
  max-width: 580px;
  margin-bottom: 36px;
}

.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 52px; }

/* ================= BUTONLAR ================= */
.btn {
  display: inline-block;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 15px;
  padding: 14px 34px;
  border-radius: var(--radius-sm);
  border: none;
  transition: all .25s;
  text-align: center;
  letter-spacing: .3px;
}

.btn-primary {
  background: linear-gradient(135deg, var(--silver-dark), var(--silver) 55%, var(--silver-light));
  color: #0B0E14;
  box-shadow: var(--glow-silver);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 32px rgba(192, 199, 209, .35);
}

.btn-outline {
  background: transparent;
  color: var(--text-main);
  border: 1px solid rgba(192, 199, 209, .5);
}

.btn-outline:hover {
  border-color: var(--silver);
  color: var(--silver-light);
  background: rgba(192, 199, 209, .06);
}

.btn-dark {
  background: var(--bg-2);
  color: var(--silver-light);
  border: 1px solid var(--border-silver);
}

.btn-dark:hover { background: var(--bg-3); transform: translateY(-2px); }

.btn-sm {
  padding: 10px 22px;
  font-size: 13px;
  background: var(--bg-2);
  color: var(--silver-light);
  border: 1px solid var(--border-silver);
}

.btn-sm:hover { background: var(--silver); color: #0B0E14; }

.btn-block { width: 100%; }

/* Hero stats */
.hero-stats {
  display: flex;
  gap: 44px;
  flex-wrap: wrap;
}

.hero-stat {
  display: flex;
  flex-direction: column;
  border-left: 2px solid var(--silver);
  padding-left: 16px;
}

.stat-num {
  font-family: var(--font-head);
  font-size: 42px;
  font-weight: 700;
  line-height: 1;
  color: var(--silver-light);
  text-shadow: 0 0 30px rgba(192, 199, 209, .25);
}

.stat-label { font-size: 12px; color: rgba(232, 235, 240, .6); margin-top: 6px; text-transform: uppercase; letter-spacing: 1.2px; }

.hero-scroll {
  position: absolute;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 3;
  width: 28px;
  height: 48px;
  border: 1px solid rgba(192, 199, 209, .5);
  border-radius: 16px;
  display: flex;
  justify-content: center;
  padding-top: 8px;
}

.hero-scroll span {
  width: 4px;
  height: 10px;
  background: var(--silver);
  border-radius: 2px;
  animation: scrollHint 1.6s infinite;
}

@keyframes scrollHint {
  0% { transform: translateY(0); opacity: 1; }
  100% { transform: translateY(16px); opacity: 0; }
}

/* ================= SAYFA BAŞLIĞI (Alt Sayfalar) ================= */
.page-hero {
  position: relative;
  padding: 120px 0 80px;
  background:
    url('../assets/chemical-banner.svg'),
    var(--bg-0);
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  overflow: hidden;
  border-bottom: 1px solid var(--border-dark);
}

.page-hero::before {
  content: '';
  position: absolute;
  top: -150px;
  right: -150px;
  width: 400px;
  height: 400px;
  border: 40px solid rgba(192, 199, 209, .03);
  border-radius: 50%;
}

.page-hero::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--silver-dark), transparent);
}

.page-hero-overlay {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 80% 20%, rgba(192, 199, 209, .08) 0%, transparent 50%),
    linear-gradient(90deg, rgba(10, 12, 16, .95), rgba(10, 12, 16, .8));
  z-index: 1;
}

.page-hero-content {
  position: relative;
  z-index: 2;
  max-width: 760px;
}

.page-hero-title {
  font-family: var(--font-head);
  font-size: 52px;
  font-weight: 700;
  text-transform: uppercase;
  line-height: 1.15;
  color: var(--text-main);
  margin-bottom: 14px;
}

.page-hero-desc {
  font-size: 17px;
  color: var(--text-muted);
  max-width: 580px;
}

/* ================= GENEL BÖLÜMLER ================= */
.section { padding: 96px 0; }

.section-head {
  max-width: 760px;
  margin: 0 auto 56px;
  text-align: center;
}

.section-kicker {
  display: inline-block;
  font-weight: 600;
  font-size: 12px;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--silver);
  margin-bottom: 14px;
}

.section-kicker::before,
.section-kicker::after {
  content: '—';
  margin: 0 10px;
  color: var(--silver-dark);
}

.section-title {
  font-family: var(--font-head);
  font-size: 42px;
  font-weight: 700;
  text-transform: uppercase;
  line-height: 1.15;
  margin-bottom: 18px;
  color: var(--text-main);
}

.section-desc { font-size: 16px; color: var(--text-muted); }

/* ================= HAKKIMIZDA ================= */
.about-section { background: var(--bg-1); }

.tabs {
  display: flex;
  gap: 8px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 44px;
}

.tab-btn {
  background: var(--bg-2);
  border: 1px solid var(--border-dark);
  border-radius: 30px;
  padding: 10px 24px;
  font-weight: 500;
  font-size: 14px;
  color: var(--text-muted);
  transition: all .2s;
}

.tab-btn:hover { border-color: var(--border-silver); color: var(--silver-light); }

.tab-btn.active {
  background: linear-gradient(135deg, var(--silver-dark), var(--silver));
  border-color: var(--silver);
  color: #0B0E14;
  font-weight: 700;
  box-shadow: var(--glow-silver);
}

.tab-panel { display: none; }
.tab-panel.active { display: block; animation: fadeIn .4s ease; }

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

.about-grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 48px;
  align-items: start;
}

.years-badge {
  display: inline-block;
  background: var(--bg-2);
  border: 1px solid var(--border-silver);
  color: var(--silver-light);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 2px;
  padding: 7px 16px;
  border-radius: var(--radius-sm);
  margin-bottom: 20px;
}

.about-content h3 {
  font-family: var(--font-head);
  font-size: 32px;
  text-transform: uppercase;
  line-height: 1.2;
  margin-bottom: 20px;
}

.about-content p { color: var(--text-muted); margin-bottom: 16px; }

.check-list { margin: 24px 0 30px; display: grid; gap: 12px; }

.check-list li {
  position: relative;
  padding-left: 30px;
  font-weight: 500;
}

.check-list li::before {
  content: '✓';
  position: absolute;
  left: 0;
  top: 0;
  color: var(--silver);
  font-size: 15px;
  font-weight: 700;
}

.about-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.about-card {
  background: var(--bg-2);
  border-radius: var(--radius);
  padding: 24px;
  border: 1px solid var(--border-dark);
  border-top: 2px solid var(--silver);
  transition: transform .25s, border-color .25s, box-shadow .25s;
}

.about-card.small { border-top-color: var(--silver-dark); }

.about-card:hover {
  transform: translateY(-3px);
  border-color: var(--border-silver);
  box-shadow: var(--shadow);
}

.about-card h4 { font-size: 15px; margin-bottom: 8px; color: var(--silver-light); }

.about-card p { font-size: 13px; color: var(--text-muted); }

.about-card .icon-chip .ci { color: var(--silver); }

.mini-list { margin-top: 12px; display: grid; gap: 7px; }

.mini-list li { font-size: 13px; color: var(--text-muted); border-bottom: 1px dashed var(--border-dark); padding-bottom: 7px; }

.mini-list li:last-child { border-bottom: none; }

.mini-list strong { color: var(--text-main); }

/* Vizyon / Misyon / Sürdürülebilirlik */
.vmm-panel {
  max-width: 780px;
  margin: 0 auto;
  text-align: center;
  background: var(--bg-2);
  border-radius: var(--radius);
  padding: 52px;
  border: 1px solid var(--border-dark);
  border-top: 3px solid var(--silver);
  box-shadow: var(--shadow);
}

.vmm-panel .ci { display: inline-flex; margin: 0 auto 16px; }

.vmm-panel h3 {
  font-family: var(--font-head);
  font-size: 28px;
  text-transform: uppercase;
  color: var(--silver-light);
  margin-bottom: 16px;
}

.vmm-panel p { color: var(--text-muted); margin-bottom: 14px; }

/* ================= SEKTÖRLER (GÜMÜŞ ZEMİN) ================= */
.sectors-section {
  background: linear-gradient(135deg, #B6BEC9, #D5DBE3 50%, #E8ECF2);
}

.sectors-section .section-kicker { color: #0B0E14; }
.sectors-section .section-kicker::before,
.sectors-section .section-kicker::after { color: #6E7684; }
.sectors-section .section-title { color: #0B0E14; }
.sectors-section .section-desc { color: #3A3F4A; }

.sector-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 22px;
}

.sector-card {
  background: #F5F7FA;
  border-radius: var(--radius);
  padding: 32px;
  border: 1px solid #8B93A0;
  border-left: 3px solid #6E7684;
  box-shadow: 0 4px 18px rgba(20, 24, 30, 0.12);
  transition: transform .25s, box-shadow .25s, border-color .25s;
}

.sector-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 30px rgba(20, 24, 30, 0.2);
  border-color: #6E7684;
}

.sector-card .ci { color: #6E7684; margin-bottom: 14px; }

.sector-card h3 { font-size: 18px; color: #0B0E14; margin-bottom: 8px; }

.sector-card > p { font-size: 14px; color: #3A3F4A; margin-bottom: 14px; }

.sector-card ul { display: grid; gap: 7px; margin-bottom: 18px; }

.sector-card ul li { font-size: 13px; color: #3A3F4A; position: relative; padding-left: 18px; }

.sector-card ul li::before { content: '›'; position: absolute; left: 2px; color: #6E7684; font-weight: 700; }

.sector-link { font-weight: 700; font-size: 14px; color: #0B0E14; }

.sector-link:hover { text-decoration: underline; color: #6E7684; }

/* ================= TICKER ================= */
.ticker-band {
  background: linear-gradient(90deg, var(--silver-dark), var(--silver) 40%, var(--silver-dark));
  overflow: hidden;
  padding: 15px 0;
  position: relative;
}

.ticker-band::before,
.ticker-band::after {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  width: 60px;
  z-index: 2;
}

.ticker-band::before { left: 0; background: linear-gradient(90deg, var(--silver-dark), transparent); }
.ticker-band::after { right: 0; background: linear-gradient(-90deg, var(--silver-dark), transparent); }

.ticker-track {
  display: flex;
  gap: 56px;
  white-space: nowrap;
  animation: tickerScroll 30s linear infinite;
  width: max-content;
}

@keyframes tickerScroll {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

.ticker-item { color: #0B0E14; font-weight: 700; font-size: 14px; letter-spacing: .4px; }

/* ================= ÜRÜN KATEGORİLERİ ================= */
.categories-section { background: var(--bg-1); }

.category-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.category-card {
  background: var(--bg-2);
  border-radius: var(--radius);
  padding: 28px;
  text-align: center;
  transition: transform .25s, box-shadow .25s, border-color .25s;
  border: 1px solid var(--border-dark);
}

.category-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
  border-color: var(--border-silver);
}

.category-card .icon-chip .ci { color: var(--silver); }

.category-card h3 { font-size: 16px; margin-bottom: 8px; color: var(--silver-light); }

.category-card p { font-size: 13px; color: var(--text-muted); margin-bottom: 18px; }

.category-count {
  display: inline-block;
  background: rgba(192, 199, 209, .1);
  border: 1px solid var(--border-silver);
  color: var(--silver-light);
  font-size: 12px;
  font-weight: 600;
  padding: 4px 16px;
  border-radius: 20px;
}

.category-cta { text-align: center; margin-top: 44px; }

/* ================= SERTİFİKALAR (GÜMÜŞ ZEMİN) ================= */
.cert-section {
  background: linear-gradient(135deg, #B6BEC9, #D5DBE3 50%, #E8ECF2);
  position: relative;
  overflow: hidden;
}

.cert-section::before {
  content: '';
  position: absolute;
  top: -200px;
  right: -200px;
  width: 500px;
  height: 500px;
  border: 40px solid rgba(11, 14, 20, .04);
  border-radius: 50%;
}

.cert-section::after {
  content: '';
  position: absolute;
  bottom: -200px;
  left: -200px;
  width: 500px;
  height: 500px;
  border: 40px solid rgba(11, 14, 20, .03);
  border-radius: 50%;
}

.section-head.light .section-kicker { color: #0B0E14; }
.section-head.light .section-title { color: #0B0E14; }
.section-head.light .section-desc { color: #3A3F4A; }

.cert-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.cert-card {
  background: #F5F7FA;
  border: 1px solid #8B93A0;
  border-radius: var(--radius);
  padding: 36px 24px;
  text-align: center;
  box-shadow: 0 4px 18px rgba(20, 24, 30, 0.12);
  transition: all .3s;
  position: relative;
  z-index: 2;
}

.cert-card:hover {
  transform: translateY(-4px);
  border-color: #6E7684;
  box-shadow: 0 10px 30px rgba(20, 24, 30, 0.2);
}

.cert-card .icon-chip { background: #EAEDF2; border-color: #B6BEC9; }
.cert-card .icon-chip .ci { color: #0B0E14; }

.cert-card h3 {
  color: #0B0E14;
  font-family: var(--font-head);
  font-size: 24px;
  text-transform: uppercase;
  margin-bottom: 4px;
}

.cert-sub { color: #6E7684; font-size: 13px; font-weight: 600; margin-bottom: 14px; }

.cert-card p { color: #3A3F4A; font-size: 13px; margin-bottom: 18px; }

.cert-link { color: #0B0E14; font-size: 13px; font-weight: 700; border-bottom: 1px solid #6E7684; padding-bottom: 2px; }

.cert-link:hover { color: #6E7684; }

/* ================= SÜREÇ ================= */
.process-section { background: var(--bg-1); }

.process-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.process-card {
  background: var(--bg-2);
  border-radius: var(--radius);
  padding: 32px 24px;
  border: 1px solid var(--border-dark);
  position: relative;
  border-top: 3px solid var(--silver-dark);
  transition: transform .25s, border-color .25s;
}

.process-card:hover { transform: translateY(-4px); border-top-color: var(--silver); }

.process-num {
  font-family: var(--font-head);
  font-size: 46px;
  font-weight: 700;
  color: rgba(192, 199, 209, .2);
  display: block;
  margin-bottom: 14px;
  line-height: 1;
}

.process-card h3 { font-size: 16px; margin-bottom: 10px; color: var(--silver-light); }

.process-card p { font-size: 13px; color: var(--text-muted); }

/* ================= PERFORMANS ÜRÜNLERİ ================= */
.performance-section { background: var(--bg-0); }

.perf-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.perf-card {
  background: var(--bg-2);
  border-radius: var(--radius);
  padding: 24px;
  border: 1px solid var(--border-dark);
  display: flex;
  flex-direction: column;
  transition: transform .25s, box-shadow .25s, border-color .25s;
}

.perf-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
  border-color: var(--border-silver);
}

.perf-tag {
  display: inline-block;
  background: linear-gradient(135deg, var(--silver-dark), var(--silver));
  color: #0B0E14;
  font-size: 11px;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 4px;
  margin-bottom: 14px;
  align-self: flex-start;
}

.perf-card h3 { font-size: 16px; margin-bottom: 10px; color: var(--silver-light); }

.perf-card p { font-size: 13px; color: var(--text-muted); margin-bottom: 16px; flex: 1; }

.perf-meta { font-size: 12px; font-weight: 600; color: var(--silver); margin-bottom: 14px; }

.perf-cta { text-align: center; margin-top: 44px; }

/* ================= TEKLİF ================= */
.teklif-section { background: var(--bg-1); }

.teklif-wrapper {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 0;
  background: var(--bg-2);
  border-radius: var(--radius);
  border: 1px solid var(--border-dark);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

.teklif-info {
  background: var(--bg-0);
  color: var(--text-main);
  padding: 48px;
  position: relative;
  overflow: hidden;
  border-right: 1px solid var(--border-dark);
}

.teklif-info::after {
  content: '';
  position: absolute;
  bottom: -80px;
  right: -80px;
  width: 220px;
  height: 220px;
  border: 30px solid rgba(192, 199, 209, .04);
  border-radius: 50%;
}

.teklif-info .section-kicker { color: var(--silver); }
.teklif-title { font-family: var(--font-head); font-size: 32px; text-transform: uppercase; line-height: 1.2; margin-bottom: 18px; }
.teklif-info > p { color: var(--text-muted); margin-bottom: 28px; }

.benefit-list { display: grid; gap: 14px; margin-bottom: 34px; }

.benefit-list li { display: flex; align-items: center; gap: 12px; font-weight: 500; }

.benefit-icon {
  width: 28px;
  height: 28px;
  background: linear-gradient(135deg, var(--silver-dark), var(--silver));
  color: #0B0E14;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 700;
}

.contact-quick { display: grid; gap: 12px; position: relative; z-index: 2; }

.contact-quick-item {
  display: flex;
  align-items: center;
  gap: 14px;
  background: var(--bg-2);
  border: 1px solid var(--border-dark);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  transition: background .2s, border-color .2s;
}

.contact-quick-item:hover { background: var(--bg-3); border-color: var(--border-silver); }

.contact-quick-icon { display: flex; color: var(--silver); }

.contact-quick-item small { display: block; color: var(--text-soft); font-size: 11px; text-transform: uppercase; letter-spacing: 1px; }

.contact-quick-item strong { font-size: 15px; color: var(--silver-light); }

/* Form */
.teklif-form { padding: 48px; }

.teklif-form h3 { font-family: var(--font-head); font-size: 26px; text-transform: uppercase; color: var(--silver-light); margin-bottom: 6px; }

.form-note { font-size: 14px; color: var(--text-muted); margin-bottom: 28px; }

.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

.form-group { margin-bottom: 18px; }

.form-group label { display: block; font-size: 13px; font-weight: 600; margin-bottom: 7px; color: var(--text-main); }

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 13px 15px;
  border: 1px solid var(--border-dark);
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 14px;
  color: var(--text-main);
  background: var(--bg-1);
  transition: border-color .2s, box-shadow .2s;
}

.form-group input::placeholder,
.form-group textarea::placeholder { color: var(--text-soft); }

.form-group select option { background: var(--bg-2); color: var(--text-main); }

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--silver);
  box-shadow: 0 0 0 3px rgba(192, 199, 209, .12);
}

.form-group input.invalid,
.form-group select.invalid,
.form-group textarea.invalid { border-color: #E85D5D; }

.form-error { display: block; font-size: 12px; color: #E88585; font-weight: 600; margin-top: 4px; min-height: 0; }

.checkbox-label { display: flex; gap: 10px; align-items: flex-start; font-size: 13px; color: var(--text-muted); cursor: pointer; }

.checkbox-label input { width: auto; margin-top: 3px; accent-color: var(--silver); }

.form-success {
  display: none;
  background: rgba(192, 199, 209, .08);
  border: 1px solid var(--border-silver);
  border-radius: var(--radius-sm);
  padding: 20px;
  text-align: center;
  margin-top: 20px;
}

.form-success.show { display: block; animation: fadeIn .4s ease; }

.success-icon {
  width: 46px;
  height: 46px;
  background: linear-gradient(135deg, var(--silver-dark), var(--silver));
  color: #0B0E14;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  margin-bottom: 10px;
}

.form-success h4 { color: var(--silver-light); margin-bottom: 4px; }

.form-success p { font-size: 13px; color: var(--silver-pale); }

/* ================= İLETİŞİM ================= */
.contact-section { background: var(--bg-1); }

.contact-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.contact-card {
  background: var(--bg-2);
  border-radius: var(--radius);
  padding: 32px 24px;
  text-align: center;
  border: 1px solid var(--border-dark);
  border-bottom: 3px solid var(--silver);
  transition: transform .25s, border-color .25s;
}

.contact-card:hover { transform: translateY(-4px); border-color: var(--border-silver); }

.contact-card .icon-chip { margin: 0 auto 14px; }

.contact-card h3 { font-size: 16px; margin-bottom: 10px; color: var(--silver-light); }

.contact-card p { font-size: 14px; color: var(--text-muted); }

.contact-card a { color: var(--text-main); font-weight: 600; }

.contact-card a:hover { color: var(--silver-light); }

/* ================= FOOTER ================= */
.site-footer {
  background: var(--bg-0);
  border-top: 1px solid var(--border-dark);
  position: relative;
}

.site-footer::before {
  content: '';
  position: absolute;
  top: -1px;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--silver-dark), transparent);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 40px;
  padding: 64px 24px 48px;
}

.footer-logo { height: 50px; margin-bottom: 18px; }

.footer-brand p { font-size: 14px; color: var(--text-muted); margin-bottom: 20px; }

.footer-socials { display: flex; gap: 10px; }

.footer-social {
  width: 36px;
  height: 36px;
  background: var(--bg-2);
  border: 1px solid var(--border-dark);
  border-radius: var(--radius-sm);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 700;
  color: var(--text-muted);
  transition: all .2s;
}

.footer-social:hover { border-color: var(--silver); color: var(--silver); box-shadow: var(--glow-silver); }

.footer-col h4 {
  color: var(--silver-light);
  font-family: var(--font-head);
  font-size: 16px;
  text-transform: uppercase;
  margin-bottom: 22px;
  position: relative;
  padding-bottom: 10px;
  letter-spacing: 1px;
}

.footer-col h4::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 36px;
  height: 2px;
  background: var(--silver);
  box-shadow: 0 0 8px rgba(192, 199, 209, .4);
}

.footer-links { display: grid; gap: 11px; }

.footer-links a { font-size: 14px; color: var(--text-muted); transition: color .2s, padding-left .2s; }

.footer-links a:hover { color: var(--silver-light); padding-left: 6px; }

.footer-contact { display: grid; gap: 13px; }

.footer-contact li { font-size: 14px; color: var(--text-muted); display: flex; gap: 10px; align-items: flex-start; }

.footer-contact .ci { flex-shrink: 0; margin-top: 2px; color: var(--silver); }

.footer-contact a:hover { color: var(--silver-light); }

.footer-cta { margin-top: 22px; }

.footer-bottom {
  border-top: 1px solid var(--border-dark);
  padding: 22px 0;
}

.footer-bottom .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
}

.footer-bottom p { font-size: 13px; color: var(--text-soft); }

/* ================= SABİT TEKLİF ================= */
.floating-quote {
  position: fixed;
  bottom: 28px;
  right: 28px;
  z-index: 99;
  display: flex;
  align-items: center;
  gap: 10px;
  background: linear-gradient(135deg, var(--silver-dark), var(--silver) 55%, var(--silver-light));
  color: #0B0E14;
  padding: 14px 24px;
  border-radius: 50px;
  font-weight: 700;
  font-size: 15px;
  box-shadow: 0 8px 30px rgba(192, 199, 209, .3);
  transition: transform .25s, box-shadow .25s;
}

.floating-quote:hover { transform: translateY(-3px) scale(1.03); box-shadow: 0 12px 40px rgba(192, 199, 209, .4); }

.fq-icon { display: flex; }

/* ================= RESPONSIVE ================= */
@media (min-width: 1200px) {
  .header-phone { display: flex; }
}

@media (max-width: 1024px) {
  .hero-title { font-size: 48px; }
  .cert-grid { grid-template-columns: repeat(2, 1fr); }
  .perf-grid { grid-template-columns: repeat(2, 1fr); }
  .process-grid { grid-template-columns: repeat(2, 1fr); }
  .category-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: repeat(2, 1fr); }
  .about-grid { grid-template-columns: 1fr; }
  .teklif-wrapper { grid-template-columns: 1fr; }
  .teklif-info { border-right: none; border-bottom: 1px solid var(--border-dark); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .nav-link { padding: 10px 10px; font-size: 13px; }
}

@media (max-width: 768px) {
  .topbar-right .topbar-badge { display: none; }
  .nav-toggle { display: flex; }
  .main-nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 300px;
    height: 100vh;
    background: var(--bg-0);
    flex-direction: column;
    align-items: flex-start;
    padding: 90px 28px 28px;
    gap: 6px;
    transition: right .35s ease;
    z-index: 90;
    box-shadow: -20px 0 60px rgba(0, 0, 0, .6);
    border-left: 1px solid var(--border-dark);
  }
  .main-nav.open { right: 0; }
  .nav-link { color: var(--text-muted); width: 100%; font-size: 16px; padding: 12px; }
  .nav-link:hover { color: var(--silver-light); background: rgba(192, 199, 209, .06); }
  .nav-link.active::after { display: none; }
  .header-actions { display: none; }
  .hero { min-height: 100vh; }
  .hero-title { font-size: 38px; }
  .hero-content { padding: 100px 24px 80px; }
  .hero-stats { gap: 26px; }
  .stat-num { font-size: 34px; }
  .section { padding: 64px 0; }
  .section-title { font-size: 30px; }
  .about-cards { grid-template-columns: 1fr 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .teklif-info, .teklif-form { padding: 32px 24px; }
  .footer-grid { grid-template-columns: 1fr; gap: 36px; padding: 48px 24px 32px; }
  .footer-bottom .container { justify-content: center; text-align: center; }
  .floating-quote { bottom: 18px; right: 18px; }
}

@media (max-width: 480px) {
  .hero-title { font-size: 32px; }
  .about-cards { grid-template-columns: 1fr; }
  .cert-grid, .perf-grid, .process-grid, .category-grid, .contact-grid { grid-template-columns: 1fr; }
  .hero-actions .btn { width: 100%; }
  .sector-grid { grid-template-columns: 1fr; }
}