/* ==========================================================================
   Üstün Klima - Modern Design System & Custom Styling
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700;800&family=Plus+Jakarta+Sans:wght@400;500;600;700&display=swap');

:root {
  --primary: #ff6b00;
  --primary-hover: #e05d00;
  --primary-light: rgba(255, 107, 0, 0.1);
  --primary-gradient: linear-gradient(135deg, #ff6b00 0%, #ff8800 100%);
  --secondary: #0f172a;
  --secondary-light: #1e293b;
  --accent-blue: #0284c7;
  --accent-cyan: #06b6d4;
  --bg-main: #f8fafc;
  --bg-card: #ffffff;
  --text-main: #1e293b;
  --text-muted: #64748b;
  --text-white: #ffffff;
  --border-color: #e2e8f0;
  --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.04);
  --shadow-md: 0 10px 25px -5px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 20px 35px -10px rgba(255, 107, 0, 0.15);
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --font-heading: 'Outfit', sans-serif;
  --font-body: 'Plus Jakarta Sans', sans-serif;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  color: var(--secondary);
  font-weight: 700;
}

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

/* --- Top Announcement Bar --- */
.notice-bar {
  background: var(--secondary);
  color: #f1f5f9;
  font-size: 0.875rem;
  padding: 8px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

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

.notice-bar-info {
  display: flex;
  gap: 20px;
}

.notice-bar-info span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.notice-bar-info i {
  color: var(--primary);
}

/* --- Header / Navbar --- */
.main-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
}

.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 0;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-logo img, .brand-logo-icon {
  width: 48px;
  height: 48px;
  background: var(--primary-gradient);
  color: #fff;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  box-shadow: var(--shadow-lg);
}

.brand-text h2 {
  font-size: 1.6rem;
  line-height: 1.1;
  color: var(--secondary);
}

.brand-text h2 span {
  color: var(--primary);
}

.brand-text p {
  font-size: 0.75rem;
  color: var(--text-muted);
  letter-spacing: 1px;
  font-weight: 600;
  text-transform: uppercase;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}

.nav-link {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--secondary);
  position: relative;
  padding: 6px 0;
}

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

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--primary-gradient);
  border-radius: 4px;
}

.header-cta {
  display: flex;
  align-items: center;
  gap: 16px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  font-weight: 700;
  border-radius: var(--radius-sm);
  transition: var(--transition);
  cursor: pointer;
  border: none;
  font-family: var(--font-heading);
  font-size: 0.95rem;
}

.btn-primary {
  background: var(--primary-gradient);
  color: #fff;
  box-shadow: 0 4px 15px rgba(255, 107, 0, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(255, 107, 0, 0.45);
}

.btn-outline {
  border: 2px solid var(--primary);
  color: var(--primary);
  background: transparent;
}

.btn-outline:hover {
  background: var(--primary);
  color: #fff;
}

.btn-secondary {
  background: var(--secondary);
  color: #fff;
}

.btn-secondary:hover {
  background: var(--secondary-light);
}

/* --- Container Utility (Fluid Wide Layout) --- */
.container {
  width: 100%;
  max-width: 1750px;
  margin: 0 auto;
  padding: 0 40px;
}

/* --- Hero Section --- */
.hero-section {
  position: relative;
  padding: 80px 0 100px;
  background: radial-gradient(circle at top right, rgba(255, 107, 0, 0.05), transparent 50%),
              radial-gradient(circle at bottom left, rgba(15, 23, 42, 0.03), transparent 50%);
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 20px;
  background: var(--primary-light);
  color: var(--primary);
  border-radius: 50px;
  font-weight: 700;
  font-size: 0.95rem;
  margin-bottom: 24px;
}

.hero-title {
  font-size: 3.8rem;
  line-height: 1.12;
  margin-bottom: 24px;
}

.hero-title span {
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-description {
  font-size: 1.25rem;
  color: var(--text-muted);
  margin-bottom: 36px;
}

.hero-stats {
  display: flex;
  gap: 40px;
  margin-top: 40px;
  padding-top: 30px;
  border-top: 1px solid var(--border-color);
}

.stat-item h3 {
  font-size: 2.2rem;
  color: var(--secondary);
}

.stat-item h3 span {
  color: var(--primary);
}

.stat-item p {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 600;
}

/* --- Fast Request Card --- */
.request-card {
  background: var(--bg-card);
  padding: 32px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border-color);
}

.request-card h3 {
  font-size: 1.4rem;
  margin-bottom: 8px;
}

.request-card p {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 20px;
}

.form-group {
  margin-bottom: 16px;
}

.form-label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--secondary);
}

.form-control {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: 0.95rem;
  background: #f8fafc;
  transition: var(--transition);
}

.form-control:focus {
  outline: none;
  border-color: var(--primary);
  background: #fff;
  box-shadow: 0 0 0 3px rgba(255, 107, 0, 0.15);
}

/* --- Quick Feature Banners --- */
.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: -40px;
  position: relative;
  z-index: 10;
}

.feature-box {
  background: var(--bg-card);
  padding: 24px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border-color);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.feature-box:hover {
  transform: translateY(-5px);
  border-color: var(--primary);
  box-shadow: var(--shadow-lg);
}

.feature-icon {
  width: 54px;
  height: 54px;
  background: var(--primary-light);
  color: var(--primary);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  margin-bottom: 16px;
}

.feature-box h4 {
  font-size: 1.15rem;
  margin-bottom: 6px;
}

.feature-box p {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* --- Section Titles --- */
.section {
  padding: 80px 0;
}

.section-header {
  text-align: center;
  max-width: 650px;
  margin: 0 auto 50px;
}

.section-subtitle {
  color: var(--primary);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  font-size: 0.85rem;
  margin-bottom: 8px;
  display: block;
}

.section-title {
  font-size: 2.4rem;
  margin-bottom: 16px;
}

/* --- Services Grid --- */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(270px, 1fr));
  gap: 30px;
}

.service-card {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.service-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary);
}

.service-img {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

/* --- Symbolic Vector Icon Banner Placeholders --- */
.symbolic-banner {
  width: 100%;
  height: 200px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  color: #ffffff;
  transition: var(--transition);
}

.symbolic-banner i {
  font-size: 64px;
  margin-bottom: 8px;
  filter: drop-shadow(0 4px 10px rgba(0, 0, 0, 0.2));
  transition: var(--transition);
}

.symbolic-banner span {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.1rem;
  letter-spacing: 1px;
  text-transform: uppercase;
}

.service-card:hover .symbolic-banner i {
  transform: scale(1.15) rotate(-5deg);
}

.banner-klima { background: linear-gradient(135deg, #0284c7 0%, #06b6d4 100%); }
.banner-kombi { background: linear-gradient(135deg, #ff6b00 0%, #ef4444 100%); }
.banner-beyaz-esya { background: linear-gradient(135deg, #1e293b 0%, #475569 100%); }
.banner-spor-aletleri { background: linear-gradient(135deg, #8b5cf6 0%, #6366f1 100%); }
.banner-blog { background: linear-gradient(135deg, #0f172a 0%, #3b82f6 100%); }
.banner-error { background: linear-gradient(135deg, #b91c1c 0%, #f59e0b 100%); }

.service-body {
  padding: 24px;
}

.service-category {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.service-title {
  font-size: 1.3rem;
  margin: 8px 0 12px;
}

.service-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 20px;
}

/* --- Knowledge Base / Error Codes Section --- */
.error-codes-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 24px;
}

.error-card {
  background: var(--bg-card);
  padding: 24px;
  border-radius: var(--radius-md);
  border-left: 4px solid var(--primary);
  box-shadow: var(--shadow-sm);
  border-top: 1px solid var(--border-color);
  border-right: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.error-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.badge-code {
  background: var(--secondary);
  color: #fff;
  padding: 4px 12px;
  border-radius: 4px;
  font-weight: 800;
  font-size: 0.9rem;
}

.badge-brand {
  background: #e2e8f0;
  color: var(--secondary);
  padding: 4px 10px;
  border-radius: 4px;
  font-size: 0.8rem;
  font-weight: 600;
}

/* --- Footer --- */
.main-footer {
  background: var(--secondary);
  color: #94a3b8;
  padding: 80px 0 30px;
  margin-top: 60px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
  gap: 40px;
  margin-bottom: 50px;
}

.footer-col h3 {
  color: #fff;
  font-size: 1.2rem;
  margin-bottom: 20px;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 10px;
}

.footer-links a:hover {
  color: var(--primary);
  padding-left: 5px;
}

.footer-bottom {
  text-align: center;
  padding-top: 30px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 0.875rem;
}

/* Floating WhatsApp Button */
.whatsapp-float {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 60px;
  height: 60px;
  background: #25d366;
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 32px;
  box-shadow: 0 4px 20px rgba(37, 211, 102, 0.4);
  z-index: 999;
  transition: var(--transition);
}

.whatsapp-float:hover {
  transform: scale(1.1);
}

/* Responsive adjustments */
@media (max-width: 992px) {
  .hero-grid { grid-template-columns: 1fr; }
  .features-grid { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .nav-menu { display: none; } /* Add hamburger on mobile */
}

@media (max-width: 576px) {
  .features-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .hero-title { font-size: 2.2rem; }
}