:root {
  /* Koyu, premium ve modern kurumsal renkler */
  --bg-main: #090d16;          /* Derin koyu lacivert-arduvaz zemin */
  --bg-surface: #0f172a;       /* Kartlar ve bileşenler için katman rengi */
  --bg-surface-hover: #1e293b; /* Hover durumu */
  --border-color: #1e293b;     /* İnce ve zarif kenarlık */
  --border-subtle: #334155;
  
  --text-main: #f8fafc;        /* Parlak net başlık yazısı */
  --text-muted: #94a3b8;       /* Okunaklı, yormayan ikincil metin */
  
  --primary: #3b82f6;          /* Profesyonel kobalt mavisi */
  --primary-hover: #2563eb;
  --primary-glow: rgba(59, 130, 246, 0.12);
  
  --font-family: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
}

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

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

.container {
  width: 90%;
  max-width: 1100px;
  margin: 0 auto;
}

/* Navbar */
.navbar {
  background: rgba(9, 13, 22, 0.85);
  backdrop-filter: blur(12px);
  position: sticky;
  top: 0;
  border-bottom: 1px solid var(--border-color);
  z-index: 100;
  padding: 1.1rem 0;
}

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

.logo {
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--text-main);
  text-decoration: none;
  letter-spacing: -0.02em;
}

.logo span {
  color: var(--primary);
}

.nav-links {
  display: flex;
  gap: 1.75rem;
  align-items: center;
}

.nav-links a {
  text-decoration: none;
  color: var(--text-muted);
  font-size: 0.95rem;
  font-weight: 500;
  transition: color 0.2s ease;
}

.nav-links a:hover {
  color: var(--text-main);
}

/* Butonlar */
.btn-primary, .btn-secondary {
  padding: 0.75rem 1.4rem;
  border-radius: 8px;
  font-weight: 600;
  text-decoration: none;
  font-size: 0.95rem;
  display: inline-block;
  transition: all 0.2s ease;
}

.btn-primary {
  background-color: var(--primary);
  color: #ffffff !important;
  box-shadow: 0 4px 14px rgba(59, 130, 246, 0.3);
}

.btn-primary:hover {
  background-color: var(--primary-hover);
  transform: translateY(-1px);
}

.btn-secondary {
  background-color: var(--bg-surface);
  color: var(--text-main) !important;
  border: 1px solid var(--border-subtle);
}

.btn-secondary:hover {
  background-color: var(--bg-surface-hover);
  border-color: #475569;
}

/* Hero */
.hero {
  padding: 7rem 0 5rem;
  text-align: center;
}

.hero-content {
  max-width: 800px;
}

.badge {
  display: inline-block;
  background-color: var(--primary-glow);
  color: #60a5fa;
  border: 1px solid rgba(59, 130, 246, 0.25);
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.4rem 1rem;
  border-radius: 50px;
  margin-bottom: 1.5rem;
}

.hero h1 {
  font-size: 3rem;
  line-height: 1.2;
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 1.5rem;
  color: #ffffff;
}

.hero p {
  color: var(--text-muted);
  font-size: 1.15rem;
  margin-bottom: 2.2rem;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  justify-content: center;
  gap: 1rem;
}

/* Hizmetler */
.services {
  padding: 5rem 0;
}

.section-header {
  text-align: center;
  margin-bottom: 3.5rem;
}

.section-header h2 {
  font-size: 2.1rem;
  margin-bottom: 0.6rem;
  letter-spacing: -0.02em;
}

.section-header p {
  color: var(--text-muted);
}

.service-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

.service-card {
  background: var(--bg-surface);
  padding: 2.2rem 2rem;
  border-radius: 12px;
  border: 1px solid var(--border-color);
  transition: transform 0.2s, border-color 0.2s, background-color 0.2s;
}

.service-card:hover {
  transform: translateY(-4px);
  background-color: var(--bg-surface-hover);
  border-color: var(--border-subtle);
}

.card-icon {
  font-size: 2.2rem;
  margin-bottom: 1.2rem;
}

.service-card h3 {
  font-size: 1.25rem;
  margin-bottom: 0.75rem;
  color: #ffffff;
}

.service-card p {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* Hakkımda */
.about {
  padding: 5.5rem 0;
  background-color: #0b1120;
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.about-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 3.5rem;
  align-items: center;
}

.about-text h2 {
  font-size: 2.1rem;
  margin-bottom: 1.2rem;
  letter-spacing: -0.02em;
}

.about-text p {
  color: var(--text-muted);
  margin-bottom: 1.75rem;
  font-size: 1.05rem;
}

.check-list {
  list-style: none;
}

.check-list li {
  position: relative;
  padding-left: 1.75rem;
  margin-bottom: 0.75rem;
  color: var(--text-main);
  font-size: 0.98rem;
}

.check-list li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: #60a5fa;
  font-weight: 700;
}

.about-stats {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.stat-card {
  background: var(--bg-surface);
  padding: 1.75rem;
  border-radius: 12px;
  border: 1px solid var(--border-color);
  text-align: center;
}

.stat-card h4 {
  font-size: 2rem;
  color: #60a5fa;
  margin-bottom: 0.25rem;
}

.stat-card span {
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* İletişim */
.contact {
  padding: 6rem 0;
  text-align: center;
}

.contact-box {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  padding: 4rem 2rem;
  border-radius: 16px;
  max-width: 800px;
}

.contact-box h2 {
  font-size: 2.1rem;
  margin-bottom: 0.75rem;
  letter-spacing: -0.02em;
}

.contact-box p {
  color: var(--text-muted);
  margin-bottom: 2.2rem;
  font-size: 1.05rem;
}

.contact-links {
  display: flex;
  justify-content: center;
  gap: 1rem;
}

/* Footer */
footer {
  border-top: 1px solid var(--border-color);
  padding: 2.2rem 0;
  text-align: center;
  color: #64748b;
  font-size: 0.9rem;
}

/* Mobil Uyumluluk */
@media (max-width: 768px) {
  .hero h1 { font-size: 2.2rem; }
  .about-grid { grid-template-columns: 1fr; }
  .nav-links { display: none; }
  .hero-actions, .contact-links { flex-direction: column; }
}