/**
 * SineklikProfili.com - Ana Stil Dosyası (main.css)
 * Sıfır Harici CDN, Hafif, Ultra Hızlı, Modern B2B Endüstriyel Tasarım
 * rules.md: Kural 1-8 Uyumlu Saf Yerel CSS
 */

:root {
  --primary: #0f2c59;       /* Güçlü endüstriyel lacivert */
  --primary-hover: #1e3a8a;
  --secondary: #0284c7;     /* Canlı alüminyum mavisi */
  --secondary-hover: #0369a1;
  --accent: #f59e0b;        /* Sıcak turuncu / altın aksan */
  --accent-hover: #d97706;
  --whatsapp: #25d366;      /* Kurumsal WhatsApp yeşili */
  --whatsapp-hover: #20ba59;
  
  --bg-main: #f8fafc;
  --bg-card: #ffffff;
  --bg-card-alt: #f1f5f9;
  --text-main: #0f172a;
  --text-muted: #64748b;
  --border-color: #e2e8f0;
  
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.08), 0 2px 4px -2px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.03);
  --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-main);
  color: var(--text-main);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s ease, background-color 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* ==========================================================================
   SVG & İkon Boyutlandırma Sistemi (Kritik Düzeltme)
   ========================================================================== */
svg {
  display: inline-block;
  vertical-align: middle;
  flex-shrink: 0;
  max-width: 100%;
  max-height: 100%;
}

.w-3 { width: 0.75rem !important; }
.h-3 { height: 0.75rem !important; }

.w-3\.5, .w-3-5 { width: 0.875rem !important; }
.h-3\.5, .h-3-5 { height: 0.875rem !important; }

.w-4 { width: 1rem !important; }
.h-4 { height: 1rem !important; }

.w-5 { width: 1.25rem !important; }
.h-5 { height: 1.25rem !important; }

.w-6 { width: 1.5rem !important; }
.h-6 { height: 1.5rem !important; }

.w-7 { width: 1.75rem !important; }
.h-7 { height: 1.75rem !important; }

.w-8 { width: 2rem !important; }
.h-8 { height: 2rem !important; }

.w-10 { width: 2.5rem !important; }
.h-10 { height: 2.5rem !important; }

.w-12 { width: 3rem !important; }
.h-12 { height: 3rem !important; }

.w-16 { width: 4rem !important; }
.h-16 { height: 4rem !important; }

.w-20 { width: 5rem !important; }
.h-20 { height: 5rem !important; }

/* ==========================================================================
   Kapsayıcı (Container)
   ========================================================================== */
.container {
  max-width: 1280px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.25rem;
  padding-right: 1.25rem;
}

/* ==========================================================================
   Header & Navbar
   ========================================================================== */
.top-bar {
  background: #0f172a;
  color: #94a3b8;
  font-size: 0.8125rem;
  padding: 0.5rem 0;
  border-bottom: 1px solid #1e293b;
}

.top-bar-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.site-header {
  background: #ffffff;
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 50;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.nav-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 4.5rem;
  flex-wrap: nowrap;
  gap: 1rem;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  text-decoration: none;
  flex-shrink: 0;
}

.brand-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  background: linear-gradient(135deg, #0f2c59 0%, #0284c7 100%);
  color: #ffffff;
  border-radius: 0.5rem;
  box-shadow: 0 3px 8px rgba(2, 132, 199, 0.25);
  flex-shrink: 0;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.brand-logo:hover .brand-icon {
  transform: scale(1.05);
  box-shadow: 0 4px 12px rgba(2, 132, 199, 0.35);
}

.brand-text-group {
  display: flex;
  flex-direction: column;
}

.brand-main-row {
  display: flex;
  align-items: center;
  gap: 0.45rem;
}

.brand-name {
  font-weight: 800;
  font-size: 1.25rem;
  color: var(--primary);
  letter-spacing: -0.02em;
  line-height: 1.2;
  white-space: nowrap;
}

.brand-accent {
  color: var(--secondary);
}

.brand-reg {
  font-size: 0.6em;
  font-weight: 700;
  color: var(--secondary);
  top: -0.55em;
  margin-left: 1px;
}

.brand-badge {
  background: linear-gradient(135deg, #0284c7 0%, #0369a1 100%);
  color: #ffffff;
  font-size: 0.6rem;
  font-weight: 800;
  padding: 0.175rem 0.45rem;
  border-radius: 4px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  box-shadow: 0 1px 3px rgba(2, 132, 199, 0.25);
  display: inline-flex;
  align-items: center;
  line-height: 1;
  border: 1px solid rgba(255, 255, 255, 0.25);
  white-space: nowrap;
}

.nav-links {
  display: flex;
  gap: 1.15rem;
  align-items: center;
  list-style: none;
  flex-wrap: nowrap;
  white-space: nowrap;
  margin: 0;
  padding: 0;
}

.nav-item {
  flex-shrink: 0;
}

.nav-item > a {
  font-weight: 600;
  font-size: 0.875rem;
  color: #334155;
  padding: 0.5rem 0;
  display: block;
  white-space: nowrap;
  transition: color 0.15s ease;
}

.nav-item > a:hover {
  color: var(--secondary);
}

.nav-cta-group {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-shrink: 0;
}

/* ==========================================================================
   Butonlar
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-weight: 700;
  font-size: 0.9375rem;
  padding: 0.75rem 1.5rem;
  border-radius: 0.375rem;
  cursor: pointer;
  border: 1px solid transparent;
  line-height: 1.25;
  white-space: nowrap;
  transition: all 0.2s ease;
  text-align: center;
}

.btn-primary {
  background-color: var(--primary);
  color: #ffffff;
}
.btn-primary:hover {
  background-color: var(--primary-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(15, 44, 89, 0.25);
}

.btn-accent {
  background-color: var(--accent);
  color: #ffffff;
}
.btn-accent:hover {
  background-color: var(--accent-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(245, 158, 11, 0.3);
}

.btn-whatsapp {
  background-color: var(--whatsapp);
  color: #ffffff;
}
.btn-whatsapp:hover {
  background-color: var(--whatsapp-hover);
  box-shadow: 0 4px 12px rgba(37, 211, 102, 0.3);
}

.btn-outline {
  border-color: var(--border-color);
  background: #ffffff;
  color: #1e293b;
}
.btn-outline:hover {
  background: #f1f5f9;
  border-color: #cbd5e1;
  color: var(--primary);
}

.btn-outline-light {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.3);
  color: #ffffff !important;
}
.btn-outline-light:hover {
  background: rgba(255, 255, 255, 0.18);
  border-color: rgba(255, 255, 255, 0.6);
  color: #ffffff !important;
  transform: translateY(-1px);
}

.btn-white {
  background: #ffffff;
  color: var(--primary) !important;
  border: 1px solid #ffffff;
  font-weight: 800;
}
.btn-white:hover {
  background: #f1f5f9;
  color: var(--primary-hover) !important;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.btn-sm {
  padding: 0.45rem 0.85rem;
  font-size: 0.8125rem;
}

/* ==========================================================================
   İl & Bölge Şehir Kartları
   ========================================================================== */
.city-link-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  padding: 0.65rem 0.85rem;
  border: 1px solid var(--border-color);
  border-radius: 0.5rem;
  background: #ffffff;
  text-decoration: none;
  color: var(--text-main);
  font-size: 0.875rem;
  font-weight: 600;
  transition: all 0.2s ease;
  min-height: 42px;
}
.city-link-card:hover {
  border-color: var(--secondary) !important;
  background: #f0f9ff !important;
  transform: translateY(-1px);
  box-shadow: 0 4px 10px rgba(2, 132, 199, 0.08);
}
.city-link-card:hover .city-name {
  color: var(--secondary);
}
.city-card-left {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  min-width: 0;
  flex: 1 1 auto;
}
.city-plate {
  font-size: 0.75rem;
  font-weight: 800;
  background: #f1f5f9;
  color: #475569;
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
  flex-shrink: 0;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  line-height: 1.2;
}
.city-name {
  font-weight: 700;
  color: var(--primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.city-delivery-badge {
  font-size: 0.7rem;
  font-weight: 700;
  color: #16a34a;
  background: rgba(22, 163, 74, 0.08);
  padding: 0.2rem 0.45rem;
  border-radius: 4px;
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  white-space: nowrap;
  flex-shrink: 0;
  line-height: 1;
}

/* ==========================================================================
   Hero Bölümü
   ========================================================================== */
.hero-section {
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
  color: #ffffff;
  padding: 4.5rem 0 5.5rem 0;
  position: relative;
  overflow: hidden;
}

.hero-title {
  font-size: 2.5rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 1rem;
  letter-spacing: -0.02em;
}

.hero-subtitle {
  font-size: 1.125rem;
  color: #94a3b8;
  max-width: 44rem;
  margin-bottom: 2rem;
  line-height: 1.6;
}

.hero-cta-group {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
}

/* ==========================================================================
   Çift Malzeme Sütunları (Dual-Core Bifurcation Grid)
   ========================================================================== */
.dual-material-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
  margin-top: -3.5rem;
  position: relative;
  z-index: 10;
}

.material-card {
  background: #ffffff;
  border-radius: 0.875rem;
  padding: 2.25rem 2rem;
  box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.08), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
  border: 1px solid var(--border-color);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.material-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.12), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
}

.material-card.alu {
  border-top: 5px solid var(--secondary);
}

.material-card.pvc {
  border-top: 5px solid var(--primary);
}

.material-card-title {
  font-size: 1.4rem;
  font-weight: 800;
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.65rem;
  line-height: 1.3;
}

/* ==========================================================================
   Rozetler (Badges)
   ========================================================================== */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.25rem 0.6rem;
  border-radius: 4px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.badge-alu {
  background: #e0f2fe;
  color: #0369a1;
  border: 1px solid #bae6fd;
}

.badge-pvc {
  background: #dbeafe;
  color: #1d4ed8;
  border: 1px solid #bfdbfe;
}

.badge-accent {
  background: #fef3c7;
  color: #b45309;
  border: 1px solid #fde68a;
}

.badge-green {
  background: #dcfce7;
  color: #15803d;
  border: 1px solid #bbf7d0;
}

.badge-metal {
  background: #f1f5f9;
  color: #334155;
  border: 1px solid #cbd5e1;
}

/* ==========================================================================
   Teknik Tablolar
   ========================================================================== */
.tech-table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  background: #ffffff;
  border-radius: 0.5rem;
  overflow: hidden;
  border: 1px solid var(--border-color);
  font-size: 0.875rem;
}

.tech-table th {
  background: #0f172a;
  color: #ffffff;
  text-align: left;
  padding: 0.875rem 1rem;
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.tech-table td {
  padding: 0.875rem 1rem;
  border-bottom: 1px solid var(--border-color);
  color: #334155;
}

.tech-table tr:last-child td {
  border-bottom: none;
}

.tech-table tr:nth-child(even) {
  background: #f8fafc;
}

.tech-table tr:hover {
  background: #f1f5f9;
}

/* ==========================================================================
   Ürün Kartları & Grid
   ========================================================================== */
.grid-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
  margin: 2rem 0;
}

.product-card {
  background: #ffffff;
  border-radius: 0.625rem;
  border: 1px solid var(--border-color);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all 0.2s ease;
  box-shadow: var(--shadow-sm);
}

.product-card:hover {
  border-color: var(--secondary);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

/* ==========================================================================
   Şehir / Bölge Dağıtım Kartları (City Link Cards)
   ========================================================================== */
.city-cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(215px, 1fr));
  gap: 0.75rem;
  padding: 1.25rem 1.5rem 1.5rem 1.5rem;
}

.city-link-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  padding: 0.625rem 0.85rem;
  border: 1px solid var(--border-color);
  border-radius: 0.5rem;
  background: #ffffff;
  text-decoration: none;
  color: var(--text-main);
  font-size: 0.875rem;
  font-weight: 600;
  min-height: 42px;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.02);
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.city-link-card:hover {
  border-color: var(--secondary) !important;
  background: #f0f9ff !important;
  color: var(--secondary) !important;
  transform: translateY(-1px);
  box-shadow: 0 3px 8px rgba(2, 132, 199, 0.15);
}

.city-card-left {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  min-width: 0;
  flex: 1 1 auto;
}

.city-plate {
  font-size: 0.72rem;
  font-weight: 700;
  background: #f1f5f9;
  color: #64748b;
  padding: 2px 6px;
  border-radius: 4px;
  border: 1px solid #e2e8f0;
  flex-shrink: 0;
  line-height: 1.2;
  font-variant-numeric: tabular-nums;
}

.city-name {
  font-weight: 600;
  color: #1e293b;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  line-height: 1.2;
}

.city-link-card:hover .city-name {
  color: var(--secondary);
}

.city-delivery-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  font-size: 0.7rem;
  font-weight: 700;
  color: #16a34a;
  background: #f0fdf4;
  border: 1px solid #bbf7d0;
  padding: 2px 6px;
  border-radius: 4px;
  white-space: nowrap;
  flex-shrink: 0;
  line-height: 1.2;
}

@media (max-width: 640px) {
  .city-cards-grid {
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    padding: 1rem;
    gap: 0.5rem;
  }
  .city-link-card {
    padding: 0.5rem 0.65rem;
    font-size: 0.8125rem;
  }
  .city-delivery-badge {
    font-size: 0.65rem;
    padding: 1px 4px;
  }
}

/* ==========================================================================
   Hızlı Bilgi Kartı (Quick Info)
   ========================================================================== */
.quick-info-box {
  background: #f8fafc;
  border: 1px solid var(--border-color);
  border-left: 4px solid var(--primary);
  padding: 1.25rem 1.5rem;
  border-radius: 0.5rem;
  margin-bottom: 2rem;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 1.25rem;
}

.quick-info-item {
  font-size: 0.8125rem;
}

.quick-info-label {
  color: var(--text-muted);
  font-weight: 600;
  margin-bottom: 0.25rem;
  text-transform: uppercase;
  font-size: 0.6875rem;
  letter-spacing: 0.05em;
}

.quick-info-value {
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--text-main);
}

/* ==========================================================================
   Sıkça Sorulan Sorular (SSS / FAQ Accordion)
   ========================================================================== */
.faq-section {
  margin: 3.5rem 0;
}

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.faq-item {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: 0.5rem;
  overflow: hidden;
  transition: border-color 0.2s ease;
}

.faq-item.active {
  border-color: #cbd5e1;
}

.faq-header {
  padding: 1.1rem 1.25rem;
  font-weight: 700;
  font-size: 1rem;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: #ffffff;
  transition: background 0.2s ease;
  user-select: none;
  gap: 1rem;
}

.faq-header:hover {
  background: #f8fafc;
}

.faq-header svg {
  transition: transform 0.25s ease;
  flex-shrink: 0;
  color: var(--text-muted);
}

.faq-item.active .faq-header svg {
  transform: rotate(180deg);
  color: var(--primary);
}

.faq-content {
  padding: 1.1rem 1.25rem;
  border-top: 1px solid var(--border-color);
  background: #f8fafc;
  color: #334155;
  font-size: 0.9375rem;
  line-height: 1.7;
  display: none;
}

.faq-item.active .faq-content {
  display: block;
}

/* ==========================================================================
   Breadcrumb
   ========================================================================== */
.breadcrumb-nav {
  padding: 1rem 0;
  font-size: 0.8125rem;
  color: var(--text-muted);
}

.breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  list-style: none;
}

.breadcrumb-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.breadcrumb-item a:hover {
  color: var(--primary);
  text-decoration: underline;
}

/* ==========================================================================
   Form Elemanları, Hesaplama & Lead Kutusu
   ========================================================================== */
.calculator-card,
.lead-form-box {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: 0.75rem;
  padding: 2rem;
  box-shadow: var(--shadow);
}

.form-group {
  margin-bottom: 1.25rem;
}

.form-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 0.35rem;
  color: #1e293b;
}

.form-control {
  width: 100%;
  padding: 0.75rem 0.875rem;
  border: 1px solid var(--border-color);
  border-radius: 0.375rem;
  font-size: 0.9375rem;
  background: #ffffff;
  font-family: inherit;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.form-control:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(15, 44, 89, 0.15);
}

.calc-form-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

@media (max-width: 800px) {
  .calc-form-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 520px) {
  .calc-form-grid {
    grid-template-columns: 1fr;
  }
}


/* ==========================================================================
   Makale & Teknik Rehber İçeriği (.article-content)
   ========================================================================== */
.article-content h2 {
  font-size: 1.55rem;
  font-weight: 800;
  color: var(--primary);
  margin: 2.25rem 0 1rem 0;
  line-height: 1.3;
}

.article-content h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--primary);
  margin: 1.75rem 0 0.75rem 0;
}

.article-content p {
  margin-bottom: 1.25rem;
  line-height: 1.8;
  color: #334155;
}

.article-content ul,
.article-content ol {
  margin-bottom: 1.5rem;
  padding-left: 1.5rem;
  line-height: 1.75;
  color: #334155;
}

.article-content li {
  margin-bottom: 0.5rem;
}

.article-content blockquote {
  border-left: 4px solid var(--secondary);
  background: #f8fafc;
  padding: 1rem 1.5rem;
  margin: 1.5rem 0;
  border-radius: 0 0.375rem 0.375rem 0;
  font-style: italic;
  color: #475569;
}

/* ==========================================================================
   Sabit Butonlar (rules.md Kural 37-38)
   ========================================================================== */
.scroll-top-btn {
  position: fixed;
  bottom: 24px;
  left: 20px;
  z-index: 40;
  background: #1e293b;
  color: #ffffff;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
  opacity: 0;
  pointer-events: none;
  transform: translateY(20px);
  transition: all 0.3s ease;
  border: none;
}

.scroll-top-btn.visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.scroll-top-btn:hover {
  background: #0f172a;
  transform: translateY(-2px);
}

.whatsapp-pulse-btn {
  position: fixed;
  bottom: 24px;
  right: 20px;
  z-index: 40;
  background: var(--whatsapp);
  color: #ffffff;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 15px rgba(37, 211, 102, 0.4);
  transition: all 0.3s ease;
  animation: pulse 2s infinite;
}

.whatsapp-pulse-btn:hover {
  transform: scale(1.08);
  background: var(--whatsapp-hover);
}

@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(37, 211, 102, 0.6); }
  70% { box-shadow: 0 0 0 15px rgba(37, 211, 102, 0); }
  100% { box-shadow: 0 0 0 0 rgba(37, 211, 102, 0); }
}

/* ==========================================================================
   Off-Canvas Mobil Menü (rules.md Kural 36)
   ========================================================================== */
.offcanvas-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.6);
  z-index: 90;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
}

.offcanvas-overlay.open {
  opacity: 1;
  visibility: visible;
}

.offcanvas-panel {
  position: fixed;
  top: 0;
  right: 0;
  width: 85%;
  max-width: 320px;
  height: 100%;
  background: #ffffff;
  z-index: 100;
  transform: translateX(100%);
  transition: transform 0.3s ease;
  padding: 1.5rem;
  overflow-y: auto;
  box-shadow: -4px 0 20px rgba(0, 0, 0, 0.15);
}

.offcanvas-panel.open {
  transform: translateX(0);
}

.offcanvas-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border-color);
}

.offcanvas-menu-links {
  list-style: none;
}

.offcanvas-menu-links li {
  margin-bottom: 0.85rem;
}

.offcanvas-menu-links a {
  font-weight: 600;
  color: #1e293b;
  display: block;
  padding: 0.4rem 0;
}

.offcanvas-menu-links a:hover {
  color: var(--secondary);
}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
  background: #0b1329;
  color: #94a3b8;
  padding: 3.5rem 0 2rem 0;
  margin-top: 5rem;
  border-top: 1px solid #1e293b;
}

.footer-feature-bar {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.25rem;
  padding-bottom: 3rem;
  margin-bottom: 3rem;
  border-bottom: 1px solid #1e293b;
}

.footer-feature-item {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  background: #111d3d;
  padding: 1rem 1.25rem;
  border-radius: 0.5rem;
  border: 1px solid #1e293b;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.footer-feature-item:hover {
  transform: translateY(-2px);
  border-color: var(--secondary);
}

.footer-feature-icon {
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 0.375rem;
  background: rgba(2, 132, 199, 0.15);
  color: #38bdf8;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.footer-feature-title {
  font-size: 0.875rem;
  font-weight: 700;
  color: #ffffff;
}

.footer-feature-desc {
  font-size: 0.75rem;
  color: #94a3b8;
  line-height: 1.3;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr 1fr 1.1fr;
  gap: 2.5rem;
  margin-bottom: 3rem;
}

.brand-logo-footer:hover {
  opacity: 0.95;
}

.footer-desc {
  font-size: 0.84375rem;
  line-height: 1.65;
  color: #94a3b8;
  margin: 1rem 0 1.25rem 0;
}

.footer-contact-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  font-size: 0.84375rem;
}

.footer-contact-item {
  display: flex;
  align-items: flex-start;
  gap: 0.65rem;
  color: #cbd5e1;
}

.footer-contact-item svg {
  color: #38bdf8;
  margin-top: 0.15rem;
  flex-shrink: 0;
}

.footer-contact-item a:hover {
  color: #38bdf8;
}

.footer-title {
  color: #ffffff;
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 1.25rem;
  position: relative;
  padding-bottom: 0.5rem;
}

.footer-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 24px;
  height: 2px;
  background: var(--secondary);
  border-radius: 2px;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
}

.footer-links li {
  margin-bottom: 0;
}

.footer-links a {
  color: #94a3b8;
  font-size: 0.84375rem;
  display: inline-flex;
  align-items: center;
  transition: all 0.2s ease;
}

.footer-links a:hover {
  color: #38bdf8;
  transform: translateX(4px);
}

.footer-bottom {
  padding-top: 2rem;
  border-top: 1px solid #1e293b;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8125rem;
  color: #64748b;
}

.footer-bottom-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
}

.footer-bottom-links a {
  color: #94a3b8;
}

.footer-bottom-links a:hover {
  color: #ffffff;
  text-decoration: underline;
}

/* ==========================================================================
   Responsive Tasarım
   ========================================================================== */
@media (max-width: 1250px) {
  .nav-links {
    gap: 0.75rem;
  }
  .nav-item > a {
    font-size: 0.8125rem;
  }
}

@media (max-width: 1024px) {
  .nav-links {
    display: none !important;
  }
  .mobile-menu-toggle {
    display: inline-flex !important;
  }
  .hidden-mobile {
    display: none !important;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 2.5rem;
  }
  .hero-title {
    font-size: 1.85rem;
  }
  .hero-subtitle {
    font-size: 1rem;
  }
  .dual-material-grid {
    margin-top: -2rem;
    gap: 1.25rem;
  }
  .footer-bottom {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }
}

@media (max-width: 640px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  .footer-bottom-links {
    justify-content: center;
  }
}

@media (min-width: 1025px) {
  .mobile-menu-toggle {
    display: none !important;
  }
}