/* ==============================================================================
   Esen-El Mühendislik Elektrik A.Ş. - Resmi Web Sitesi Stilleri
   Tasarım Dili: Açık ve Ferah Endüstriyel Kurumsal Mimari (Varsayılan),
                 Koyu Tema Seçeneği ile %100 Uyumlu Çift Tema Mimarisi
   ============================================================================== */

:root,
html[data-theme="light"] {
  /* Renk Paleti (Açık ve Ferah Kurumsal Tonlar - Varsayılan) */
  --bg-dark: #F8FAFC;              /* Ana Zemin: Ferah mimari açık gri / off-white */
  --bg-dark-secondary: #F1F5F9;    /* İkincil Zemin: Açık slate */
  --bg-card: #FFFFFF;              /* Kartlar: Pürüzsüz saf beyaz */
  --bg-card-hover: #FFFFFF;
  --bg-card-solid: #FFFFFF;
  --bg-card-glass: rgba(255, 255, 255, 0.94);
  
  /* Navbar & Topbar */
  --topbar-bg: #F1F5F9;
  --navbar-bg: rgba(255, 255, 255, 0.94);
  --navbar-scrolled-bg: rgba(255, 255, 255, 0.98);
  --navbar-scrolled-border: rgba(2, 132, 199, 0.25);
  --navbar-shadow: 0 4px 20px rgba(15, 23, 42, 0.06);

  /* Kurumsal Elektrik Mavisi & Cyan (Esen-El Kimliği) */
  --primary-blue: #0284C7;
  --primary-light: #0369A1;
  --primary-hover: #0284C7;
  --accent-cyan: #0EA5E9;
  --accent-electric: #0284C7;
  --accent-amber: #D97706;
  --accent-amber-glow: rgba(217, 119, 6, 0.15);
  --accent-green: #16A34A;

  /* Tipografi Renkleri (Açık Temada Ultra Net ve Okunaklı) */
  --text-main: #0F172A;            /* Başlıklar & güçlü yazılar: Derin antrasit */
  --text-muted: #334155;           /* Açıklamalar & gövde metinleri: Okunaklı koyu slate */
  --text-dim: #64748B;             /* Alt etiketler, tarihler & küçük detaylar */
  --text-inverse: #FFFFFF;
  --brand-title-color: #0F172A;

  /* Kenarlıklar */
  --border-subtle: #E2E8F0;
  --border-card: #E2E8F0;
  --border-glow: rgba(2, 132, 199, 0.25);
  --border-active: #0284C7;

  /* Gölgeler (Yumuşak, Ferah ve Modern) */
  --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.04);
  --shadow-md: 0 8px 24px rgba(15, 23, 42, 0.06);
  --shadow-lg: 0 16px 40px rgba(15, 23, 42, 0.08);
  --shadow-glow: 0 8px 28px rgba(2, 132, 199, 0.15);
  --shadow-amber: 0 8px 24px rgba(217, 119, 6, 0.15);

  /* Form & Inputlar */
  --input-bg: #FFFFFF;
  --input-border: #CBD5E1;
  --input-text: #0F172A;

  /* Harita Görünümü (Açık temada doğal açık Google Maps) */
  --map-filter: none;

  /* Hero Izgara ve Degrade */
  --hero-bg: radial-gradient(circle at 50% 0%, #E0F2FE 0%, #F8FAFC 70%);
  --hero-grid-color: rgba(2, 132, 199, 0.06);
  --hero-glow: radial-gradient(circle, rgba(2, 132, 199, 0.12) 0%, rgba(14, 165, 233, 0.04) 50%, transparent 70%);
  --stat-num-color: #0284C7;

  /* Tipografi */
  --font-sans: 'Plus Jakarta Sans', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  
  /* Geçişler */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-smooth: 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

html[data-theme="dark"] {
  /* Renk Paleti (Koyu Endüstriyel Tema) */
  --bg-dark: #070D18;
  --bg-dark-secondary: #0D1726;
  --bg-card: rgba(16, 27, 46, 0.88);
  --bg-card-hover: rgba(23, 38, 64, 0.95);
  --bg-card-solid: #101B2E;
  --bg-card-glass: rgba(16, 27, 46, 0.75);

  /* Navbar & Topbar */
  --topbar-bg: rgba(7, 13, 24, 0.95);
  --navbar-bg: rgba(7, 13, 24, 0.88);
  --navbar-scrolled-bg: rgba(7, 13, 24, 0.98);
  --navbar-scrolled-border: rgba(2, 132, 199, 0.35);
  --navbar-shadow: 0 10px 30px rgba(0, 0, 0, 0.6);

  /* Kurumsal Elektrik Mavisi & Cyan */
  --primary-blue: #0284C7;
  --primary-light: #38BDF8;
  --primary-hover: #0EA5E9;
  --accent-cyan: #06B6D4;
  --accent-electric: #00F0FF;
  --accent-amber: #F59E0B;
  --accent-amber-glow: rgba(245, 158, 11, 0.3);
  --accent-green: #25D366;

  /* Tipografi Renkleri */
  --text-main: #F8FAFC;
  --text-muted: #94A3B8;
  --text-dim: #64748B;
  --text-inverse: #0F172A;
  --brand-title-color: #FFFFFF;

  /* Kenarlıklar */
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-card: rgba(255, 255, 255, 0.08);
  --border-glow: rgba(2, 132, 199, 0.35);
  --border-active: #0284C7;

  /* Gölgeler */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 10px 30px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 20px 40px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 25px rgba(2, 132, 199, 0.25);
  --shadow-amber: 0 0 20px rgba(245, 158, 11, 0.3);

  /* Form & Inputlar */
  --input-bg: rgba(7, 13, 24, 0.8);
  --input-border: rgba(255, 255, 255, 0.12);
  --input-text: #F8FAFC;

  /* Harita Görünümü (Koyu tema filtresi) */
  --map-filter: grayscale(80%) invert(90%) contrast(85%);

  /* Hero Izgara ve Degrade */
  --hero-bg: radial-gradient(circle at 50% 0%, #0d1b30 0%, #070d18 70%);
  --hero-grid-color: rgba(2, 132, 199, 0.05);
  --hero-glow: radial-gradient(circle, rgba(2, 132, 199, 0.22) 0%, rgba(6, 182, 212, 0.08) 45%, transparent 70%);
  --stat-num-color: #38BDF8;
}

/* Temel Sıfırlamalar */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-family: var(--font-sans);
  color: var(--text-main);
  background-color: var(--bg-dark);
  line-height: 1.6;
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

body {
  overflow-x: hidden;
  background-color: var(--bg-dark);
  min-height: 100vh;
  color: var(--text-main);
}

/* Konteyner */
.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Tipografi & Başlıklar */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.25;
  color: var(--text-main);
  letter-spacing: -0.02em;
}

p {
  color: var(--text-muted);
  font-size: 1.05rem;
}

a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition-fast);
}

/* Rozetler ve Vurgular */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: 9999px;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.badge-electric {
  background: rgba(2, 132, 199, 0.1);
  color: var(--primary-blue);
  border: 1px solid rgba(2, 132, 199, 0.25);
  box-shadow: var(--shadow-sm);
}

html[data-theme="dark"] .badge-electric {
  background: rgba(2, 132, 199, 0.15);
  color: var(--accent-electric);
  border-color: rgba(0, 240, 255, 0.3);
  box-shadow: 0 0 15px rgba(0, 240, 255, 0.15);
}

.badge-amber {
  background: rgba(217, 119, 6, 0.1);
  color: var(--accent-amber);
  border: 1px solid rgba(217, 119, 6, 0.25);
}

html[data-theme="dark"] .badge-amber {
  background: rgba(245, 158, 11, 0.15);
  color: var(--accent-amber);
  border-color: rgba(245, 158, 11, 0.3);
}

.text-gradient {
  background: linear-gradient(135deg, #0284C7 0%, #0369A1 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

html[data-theme="dark"] .text-gradient {
  background: linear-gradient(135deg, #ffffff 30%, var(--primary-light) 70%, var(--accent-electric) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.text-amber-gradient {
  background: linear-gradient(135deg, #D97706 0%, #B45309 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

html[data-theme="dark"] .text-amber-gradient {
  background: linear-gradient(135deg, #fff 20%, var(--accent-amber) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* ==============================================================================
   Üst Bilgi Barı & Navigasyon
   ============================================================================== */
.topbar {
  background: var(--topbar-bg);
  border-bottom: 1px solid var(--border-subtle);
  font-size: 0.875rem;
  padding: 8px 0;
  color: var(--text-dim);
  transition: background-color var(--transition-normal);
}

.topbar-content,
.topbar-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.topbar-left, .topbar-right {
  display: flex;
  align-items: center;
  gap: 20px;
}

.topbar-item {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-muted);
}

.topbar-item:hover {
  color: var(--primary-blue);
}

.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--navbar-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
  box-shadow: var(--navbar-shadow);
  transition: var(--transition-normal);
}

.navbar.scrolled {
  background: var(--navbar-scrolled-bg);
  box-shadow: var(--shadow-md);
  border-bottom-color: var(--navbar-scrolled-border);
}

.navbar-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 76px;
}

/* Logo */
.brand-logo {
  display: flex;
  align-items: center;
  gap: 14px;
}

.brand-logo-img {
  height: 46px;
  width: auto;
  max-width: 210px;
  object-fit: contain;
  display: block;
  transition: var(--transition-normal);
}

.brand-logo:hover .brand-logo-img {
  transform: scale(1.03);
}

/* Menü Öğeleri */
.nav-menu {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 18px;
}

.nav-link {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-muted);
  position: relative;
  padding: 6px 0;
  white-space: nowrap;
}

.nav-link:hover, .nav-link.active {
  color: var(--primary-blue);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background: var(--primary-blue);
  transition: var(--transition-fast);
  border-radius: 2px;
}

.nav-link:hover::after, .nav-link.active::after {
  width: 100%;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

/* Kompakt, Zarif Oval Pill Butonlar (Kare ve Hantal Yapıyı Gideren Özel Kurallar) */
.nav-actions .btn {
  height: 36px;
  padding: 6px 14px;
  font-size: 0.82rem;
  font-weight: 700;
  border-radius: 9999px;
  white-space: nowrap;
  gap: 6px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
  text-decoration: none;
  line-height: 1;
}

.nav-actions .btn svg {
  width: 13px;
  height: 13px;
  flex-shrink: 0;
}

.nav-actions .btn-shop {
  background: linear-gradient(135deg, #10b981 0%, #059669 100%);
  color: #ffffff !important;
  border: 1px solid rgba(16, 185, 129, 0.35);
}

.nav-actions .btn-shop:hover {
  background: linear-gradient(135deg, #34d399 0%, #10b981 100%);
  box-shadow: 0 4px 14px rgba(16, 185, 129, 0.4);
  transform: translateY(-1px);
}

.nav-actions .btn-primary {
  background: linear-gradient(135deg, #0284c7 0%, #0369a1 100%);
  color: #ffffff !important;
  border: 1px solid rgba(2, 132, 199, 0.35);
}

.nav-actions .btn-primary:hover {
  background: linear-gradient(135deg, #0ea5e9 0%, #0284c7 100%);
  box-shadow: 0 4px 14px rgba(2, 132, 199, 0.4);
  transform: translateY(-1px);
}

/* Tema Değiştirici Buton (Theme Toggle) */
.theme-toggle-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  border-radius: 9999px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  color: var(--text-main);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
  box-shadow: var(--shadow-sm);
  font-family: inherit;
}

.theme-toggle-btn:hover {
  border-color: var(--primary-blue);
  color: var(--primary-blue);
  transform: translateY(-1px);
}

.theme-toggle-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 18px;
  height: 18px;
  color: var(--accent-amber);
}

html[data-theme="light"] .theme-toggle-btn .icon-sun {
  display: none;
}
html[data-theme="light"] .theme-toggle-btn .icon-moon {
  display: inline-block;
}
html[data-theme="light"] .theme-toggle-label::after {
  content: 'Koyu Mod';
}

html[data-theme="dark"] .theme-toggle-btn .icon-sun {
  display: inline-block;
}
html[data-theme="dark"] .theme-toggle-btn .icon-moon {
  display: none;
}
html[data-theme="dark"] .theme-toggle-label::after {
  content: 'Açık Mod';
}

/* Broşürler Nav Butonu */
.nav-brosur-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border-radius: 8px;
  font-size: 0.85rem;
  font-weight: 600;
  background: rgba(37, 211, 102, 0.1);
  border: 1px solid rgba(37, 211, 102, 0.35);
  color: #16a34a;
  transition: all var(--transition-fast);
}

.nav-brosur-btn:hover {
  background: #25d366;
  color: #fff;
  border-color: #25d366;
  transform: translateY(-1px);
  box-shadow: 0 4px 14px rgba(37, 211, 102, 0.3);
}

/* Butonlar */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-weight: 600;
  font-size: 0.95rem;
  padding: 12px 24px;
  border-radius: 8px;
  cursor: pointer;
  border: none;
  transition: var(--transition-normal);
  font-family: inherit;
}

.btn-primary {
  background: linear-gradient(135deg, #0284c7 0%, #0369a1 100%);
  color: #fff;
  box-shadow: 0 4px 18px rgba(2, 132, 199, 0.35);
  border: 1px solid rgba(255, 255, 255, 0.15);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #0ea5e9 0%, #0284c7 100%);
  box-shadow: 0 6px 25px rgba(2, 132, 199, 0.55);
  transform: translateY(-2px);
}

.btn-outline {
  background: var(--bg-card);
  color: var(--text-main);
  border: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-sm);
}

.btn-outline:hover {
  border-color: var(--primary-blue);
  color: var(--primary-blue);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-amber {
  background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
  color: #ffffff;
  font-weight: 700;
  box-shadow: 0 4px 20px rgba(245, 158, 11, 0.35);
}

.btn-amber:hover {
  background: linear-gradient(135deg, #fbbf24 0%, #f59e0b 100%);
  box-shadow: 0 6px 28px rgba(245, 158, 11, 0.5);
  transform: translateY(-2px);
}

/* E-Ticaret / Online Mağaza Butonları */
.btn-shop {
  background: linear-gradient(135deg, #10b981 0%, #059669 100%);
  color: #ffffff !important;
  font-weight: 700;
  box-shadow: 0 4px 18px rgba(16, 185, 129, 0.35);
  border: 1px solid rgba(255, 255, 255, 0.2);
  text-decoration: none;
}

.btn-shop:hover {
  background: linear-gradient(135deg, #34d399 0%, #10b981 100%);
  box-shadow: 0 6px 26px rgba(16, 185, 129, 0.55);
  transform: translateY(-2px);
  color: #ffffff !important;
}

.mobile-only-shop {
  display: none !important;
}

@media (max-width: 991px) {
  .mobile-only-shop {
    display: block !important;
  }
}

/* Mobil Hamburger */
.mobile-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-main);
  cursor: pointer;
  padding: 8px;
}

/* ==============================================================================
   Hero Bölümü (Ferah, Aydınlık & Modern)
   ============================================================================== */
.hero-section {
  position: relative;
  padding: 100px 0 80px;
  overflow: hidden;
  background: var(--hero-bg);
  transition: background var(--transition-normal);
}

.hero-grid-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: 
    linear-gradient(var(--hero-grid-color) 1px, transparent 1px),
    linear-gradient(90deg, var(--hero-grid-color) 1px, transparent 1px);
  background-size: 60px 60px;
  background-position: center center;
  mask-image: radial-gradient(circle at 50% 30%, black 20%, transparent 80%);
  -webkit-mask-image: radial-gradient(circle at 50% 30%, black 20%, transparent 80%);
  pointer-events: none;
}

.hero-glow-sphere {
  position: absolute;
  top: 10%;
  left: 50%;
  transform: translateX(-50%);
  width: 700px;
  height: 500px;
  background: var(--hero-glow);
  filter: blur(80px);
  pointer-events: none;
  z-index: 0;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 960px;
  margin: 0 auto;
  text-align: center;
}

.hero-title {
  font-size: 3.6rem;
  line-height: 1.15;
  margin: 24px 0;
  letter-spacing: -0.03em;
  color: var(--text-main);
}

.hero-desc {
  font-size: 1.25rem;
  max-width: 780px;
  margin: 0 auto 36px;
  line-height: 1.7;
  color: var(--text-muted);
}

.hero-buttons {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 60px;
}

/* Sayaçlar ve İstatistikler */
.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: 16px;
  padding: 36px 24px;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
}

.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  position: relative;
}

.stat-item:not(:last-child)::after {
  content: '';
  position: absolute;
  right: 0;
  top: 15%;
  height: 70%;
  width: 1px;
  background: var(--border-subtle);
}

.stat-number {
  font-size: 2.8rem;
  font-weight: 800;
  color: var(--stat-num-color);
  font-family: var(--font-sans);
  line-height: 1.1;
}

.stat-label {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-top: 6px;
  font-weight: 600;
}

/* ==============================================================================
   İş Ortakları / Marka Bandı
   ============================================================================== */
.partners-section {
  padding: 40px 0;
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
  background: var(--bg-dark-secondary);
}

.partners-heading {
  text-align: center;
  font-size: 0.85rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 24px;
}

.partners-marquee {
  display: flex;
  justify-content: space-around;
  align-items: center;
  flex-wrap: wrap;
  gap: 32px;
  opacity: 0.85;
}

.partner-tag {
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 8px;
  transition: var(--transition-fast);
}

.partner-tag:hover {
  color: var(--primary-blue);
  opacity: 1;
}

/* ==============================================================================
   Hakkımızda & Mühendislik Gücü
   ============================================================================== */
.section {
  padding: 100px 0;
  position: relative;
}

.section-alt {
  background: var(--bg-dark-secondary);
}

.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 64px;
}

.section-title {
  font-size: 2.6rem;
  margin: 16px 0 18px;
  letter-spacing: -0.02em;
  color: var(--text-main);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.about-features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-top: 36px;
}

.feature-box {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: 14px;
  padding: 24px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition-normal);
}

.feature-box:hover {
  border-color: var(--border-glow);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.feature-icon {
  width: 48px;
  height: 48px;
  border-radius: 10px;
  background: rgba(2, 132, 199, 0.1);
  color: var(--primary-blue);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  font-size: 1.3rem;
}

.feature-title {
  font-size: 1.15rem;
  margin-bottom: 8px;
  color: var(--text-main);
  font-weight: 700;
}

.feature-desc {
  font-size: 0.95rem;
  color: var(--text-muted);
}

.about-visual {
  position: relative;
}

.visual-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: 20px;
  padding: 36px;
  box-shadow: var(--shadow-md);
  position: relative;
  overflow: hidden;
}

.visual-card::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 250px;
  height: 250px;
  background: radial-gradient(circle, rgba(2, 132, 199, 0.1) 0%, transparent 70%);
  filter: blur(40px);
}

.visual-highlight {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 24px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border-subtle);
}

.highlight-badge {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--accent-amber) 0%, #b45309 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.6rem;
  font-weight: 800;
  box-shadow: var(--shadow-amber);
}

.about-feature-box {
  padding: 16px 20px;
  background: var(--bg-dark-secondary);
  border: 1px solid var(--border-card);
  border-radius: 12px;
  border-left: 4px solid var(--accent-electric);
  box-shadow: var(--shadow-sm);
  transition: var(--transition-fast);
}

.about-feature-box:hover {
  transform: translateX(4px);
  box-shadow: var(--shadow-md);
}

.about-feature-box.accent-amber {
  border-left-color: var(--accent-amber);
}

.about-feature-box.accent-blue {
  border-left-color: var(--primary-light);
}

.about-feature-box-title {
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 4px;
  font-size: 1.05rem;
}

.about-feature-box-desc {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.55;
}

/* ==============================================================================
   Hizmetler Bölümü (4-6 Temel Sütun)
   ============================================================================== */
.services-pillar-tabs {
  display: flex;
  justify-content: center;
  gap: 16px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}

.pillar-tab-btn {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  color: var(--text-muted);
  padding: 14px 28px;
  border-radius: 12px;
  font-size: 1.05rem;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 12px;
  transition: var(--transition-normal);
  font-family: inherit;
  box-shadow: var(--shadow-sm);
}

.pillar-tab-btn:hover {
  border-color: var(--primary-blue);
  color: var(--primary-blue);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.pillar-tab-btn.active {
  background: var(--primary-blue);
  border-color: var(--primary-blue);
  color: #fff;
  box-shadow: 0 4px 18px rgba(2, 132, 199, 0.35);
}

.services-pillar-content {
  display: none;
}

.services-pillar-content.active {
  display: block;
  animation: fadeIn 0.3s ease-in-out;
}

.pillar-intro-box {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: 16px;
  padding: 28px 32px;
  margin-bottom: 36px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 20px;
  box-shadow: var(--shadow-sm);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.service-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: 16px;
  padding: 36px 30px;
  transition: var(--transition-normal);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.service-card::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--primary-blue), transparent);
  opacity: 0;
  transition: var(--transition-fast);
}

.service-card:hover {
  border-color: var(--border-glow);
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

.service-card:hover::after {
  opacity: 1;
}

.service-num {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  color: var(--primary-blue);
  font-weight: 700;
  margin-bottom: 16px;
  letter-spacing: 0.1em;
}

.service-title {
  font-size: 1.4rem;
  margin-bottom: 14px;
  color: var(--text-main);
  font-weight: 700;
}

.service-desc {
  font-size: 0.98rem;
  color: var(--text-muted);
  margin-bottom: 24px;
  flex-grow: 1;
}

.service-list {
  list-style: none;
  margin-bottom: 24px;
}

.service-list li {
  font-size: 0.92rem;
  color: var(--text-muted);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.service-list li svg {
  color: var(--primary-blue);
  flex-shrink: 0;
}

.service-link {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--primary-blue);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.service-link:hover {
  color: var(--accent-cyan);
  gap: 10px;
}

/* ==============================================================================
   Projeler & Referanslar (Filtreli Portföy)
   ============================================================================== */
.projects-filter {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 48px;
}

.filter-btn {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  color: var(--text-muted);
  padding: 10px 22px;
  border-radius: 9999px;
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  transition: var(--transition-fast);
  font-family: inherit;
  box-shadow: var(--shadow-sm);
}

.filter-btn:hover, .filter-btn.active {
  background: var(--primary-blue);
  color: #fff;
  border-color: var(--primary-blue);
  box-shadow: 0 4px 15px rgba(2, 132, 199, 0.35);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: 16px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: var(--transition-normal);
  cursor: pointer;
  box-shadow: var(--shadow-sm);
}

.project-card:hover {
  border-color: var(--border-glow);
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

.project-thumb {
  height: 220px;
  width: 100%;
  position: relative;
  background: var(--bg-dark-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.project-thumb-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(180deg, transparent 50%, rgba(15, 23, 42, 0.7) 100%);
  z-index: 1;
}

.project-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.project-card:hover .project-img {
  transform: scale(1.06);
}

.project-category-badge {
  position: absolute;
  top: 16px;
  left: 16px;
  z-index: 2;
  font-size: 0.75rem;
  padding: 4px 10px;
  border-radius: 6px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  background: rgba(255, 255, 255, 0.95);
  border: 1px solid var(--border-subtle);
  color: var(--primary-blue);
  box-shadow: var(--shadow-sm);
}

html[data-theme="dark"] .project-category-badge {
  background: rgba(7, 13, 24, 0.85);
  color: var(--accent-electric);
}

.project-body {
  padding: 24px;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
}

.project-name {
  font-size: 1.3rem;
  margin-bottom: 10px;
  color: var(--text-main);
  font-weight: 700;
}

.project-meta {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--border-subtle);
  font-size: 0.88rem;
  color: var(--text-dim);
}

.meta-row {
  display: flex;
  justify-content: space-between;
}

.meta-row span:last-child {
  color: var(--text-main);
  font-weight: 600;
}

/* ==============================================================================
   Toptan & Perakende Malzeme Bölümü
   ============================================================================== */
.material-pillars-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 28px;
  margin-bottom: 40px;
}

.material-pillar-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: 18px;
  padding: 36px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition-normal);
}

.material-pillar-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--border-glow);
}

.material-categories-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-bottom: 48px;
}

.category-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: 14px;
  padding: 24px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition-normal);
}

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

/* ==============================================================================
   B2B Teklif / Keşif Hesaplama Modülü (Interactive RFQ)
   ============================================================================== */
.rfq-container {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: 24px;
  padding: 48px;
  box-shadow: var(--shadow-lg);
  position: relative;
  overflow: hidden;
}

.rfq-steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 36px;
}

.rfq-step-card {
  background: var(--bg-dark-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  padding: 18px;
  display: flex;
  align-items: center;
  gap: 14px;
}

.rfq-step-num {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--primary-blue);
  color: #fff;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.rfq-form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-group.full-width {
  grid-column: span 2;
}

.form-label {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text-main);
}

.form-control {
  background: var(--input-bg);
  border: 1px solid var(--input-border);
  border-radius: 8px;
  padding: 14px 16px;
  color: var(--input-text);
  font-size: 0.95rem;
  font-family: inherit;
  transition: var(--transition-fast);
}

.form-control:focus {
  outline: none;
  border-color: var(--primary-blue);
  box-shadow: 0 0 0 3px rgba(2, 132, 199, 0.15);
}

select.form-control {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='%2364748b' viewBox='0 0 16 16'%3E%3Cpath d='M7.247 11.14L2.451 5.658C1.885 5.013 2.345 4 3.204 4h9.592a1 1 0 0 1 .753 1.659l-4.796 5.48a1 1 0 0 1-1.506 0z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
  background-size: 14px;
  padding-right: 42px;
}

.services-checkboxes {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-top: 6px;
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--bg-dark-secondary);
  border: 1px solid var(--border-subtle);
  padding: 10px 14px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 0.9rem;
  color: var(--text-muted);
  transition: var(--transition-fast);
}

.checkbox-label:hover, .checkbox-label:has(input:checked) {
  border-color: var(--primary-blue);
  color: var(--primary-blue);
  background: rgba(2, 132, 199, 0.08);
}

.checkbox-label input {
  accent-color: var(--primary-blue);
  width: 16px;
  height: 16px;
}

/* ==============================================================================
   İletişim & Lokasyon
   ============================================================================== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 48px;
}

.contact-info-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: 20px;
  padding: 36px;
  display: flex;
  flex-direction: column;
  gap: 28px;
  box-shadow: var(--shadow-sm);
}

.info-item {
  display: flex;
  gap: 18px;
}

.info-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: rgba(2, 132, 199, 0.1);
  color: var(--primary-blue);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 1.2rem;
}

.info-title {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-dim);
  margin-bottom: 4px;
  font-weight: 600;
}

.info-text {
  font-size: 1.05rem;
  color: var(--text-main);
  font-weight: 600;
}

.map-wrapper {
  border-radius: 20px;
  overflow: hidden;
  border: 1px solid var(--border-card);
  min-height: 400px;
  background: var(--bg-dark-secondary);
  position: relative;
  box-shadow: var(--shadow-sm);
}

.map-wrapper iframe {
  width: 100%;
  height: 100%;
  min-height: 400px;
  border: 0;
  filter: var(--map-filter);
  transition: filter var(--transition-normal);
}

/* ==============================================================================
   Alt Bilgi (Footer) - Prestijli Koyu Slate
   ============================================================================== */
.footer {
  background: #0B1120;
  border-top: 1px solid #1E293B;
  padding: 80px 0 30px;
  color: #94A3B8;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.2fr;
  gap: 48px;
  margin-bottom: 60px;
}

.footer-logo-desc {
  font-size: 0.95rem;
  color: #94A3B8;
  margin: 18px 0 24px;
  max-width: 360px;
}

.footer .brand-logo-img {
  background: #FFFFFF;
  padding: 6px 14px;
  border-radius: 8px;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.25);
}

.footer-heading {
  font-size: 1.05rem;
  color: #FFFFFF;
  margin-bottom: 20px;
  font-weight: 700;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-links a {
  color: #94A3B8;
  font-size: 0.92rem;
}

.footer-links a:hover {
  color: #38BDF8;
  transform: translateX(4px);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 30px;
  border-top: 1px solid #1E293B;
  font-size: 0.88rem;
  color: #64748B;
}

/* Modal Dialog */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(15, 23, 42, 0.65);
  backdrop-filter: blur(8px);
  z-index: 2000;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.modal-overlay.active {
  display: flex;
  animation: fadeIn 0.2s ease-out;
}

.modal-content {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: 20px;
  max-width: 680px;
  width: 100%;
  padding: 36px;
  position: relative;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
  color: var(--text-main);
}

.modal-close {
  position: absolute;
  top: 20px;
  right: 20px;
  background: var(--bg-dark-secondary);
  border: 1px solid var(--border-subtle);
  color: var(--text-main);
  font-size: 1.4rem;
  cursor: pointer;
  width: 36px;
  height: 36px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.modal-close:hover {
  background: var(--primary-blue);
  color: #fff;
  border-color: var(--primary-blue);
}

/* Floating WhatsApp Button */
.whatsapp-float {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 60px;
  height: 60px;
  background: #25d366;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 30px;
  box-shadow: 0 4px 20px rgba(37, 211, 102, 0.4);
  z-index: 999;
  transition: var(--transition-normal);
}

.whatsapp-float:hover {
  transform: scale(1.08) translateY(-4px);
  box-shadow: 0 8px 25px rgba(37, 211, 102, 0.6);
}

/* Sıkça Sorulan Sorular (FAQ) Accordion */
.faq-grid {
  display: flex;
  flex-direction: column;
  gap: 16px;
  max-width: 900px;
  margin: 0 auto;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: 14px;
  overflow: hidden;
  transition: var(--transition-fast);
  box-shadow: var(--shadow-sm);
}

.faq-item:hover {
  border-color: var(--border-glow);
  box-shadow: var(--shadow-md);
}

.faq-question {
  padding: 20px 24px;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-main);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  user-select: none;
}

.faq-icon {
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-fast);
  color: var(--primary-blue);
  font-size: 1.4rem;
}

.faq-item.active .faq-icon {
  transform: rotate(45deg);
  color: var(--accent-amber);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s cubic-bezier(0, 1, 0, 1);
  padding: 0 24px;
  color: var(--text-muted);
  font-size: 0.98rem;
  line-height: 1.7;
}

.faq-item.active .faq-answer {
  max-height: 500px;
  padding-bottom: 24px;
  transition: max-height 0.3s ease-in-out;
}

/* Animasyonlar */
@keyframes fadeIn {
  from { opacity: 0; transform: scale(0.97); }
  to { opacity: 1; transform: scale(1); }
}

/* Responsive Düzen */
@media (max-width: 1024px) {
  .hero-title {
    font-size: 2.8rem;
  }
  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }
  .stat-item:nth-child(2)::after {
    display: none;
  }
  .services-grid, .projects-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .about-grid, .contact-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
  .material-categories-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 991px) {
  .topbar {
    display: none;
  }
  .nav-menu {
    display: none;
    position: absolute;
    top: 76px;
    left: 0;
    width: 100%;
    background: var(--bg-card);
    flex-direction: column;
    padding: 24px;
    border-bottom: 1px solid var(--border-subtle);
    box-shadow: var(--shadow-lg);
    gap: 16px;
  }
  .nav-menu.mobile-active {
    display: flex;
  }
  .mobile-toggle {
    display: block;
  }
  .nav-actions .btn {
    display: none;
  }
  .hero-title {
    font-size: 2.2rem;
  }
  .hero-desc {
    font-size: 1.05rem;
  }
  .hero-stats {
    grid-template-columns: 1fr;
  }
  .stat-item::after {
    display: none !important;
  }
  .services-grid, .projects-grid {
    grid-template-columns: 1fr;
  }
  .rfq-steps, .rfq-form-grid {
    grid-template-columns: 1fr;
  }
  .material-pillars-grid, .material-categories-grid {
    grid-template-columns: 1fr;
  }
  .form-group.full-width {
    grid-column: span 1;
  }
  .services-checkboxes {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }
  .footer-bottom {
    flex-direction: column;
    gap: 16px;
    text-align: center;
  }
}