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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 100px;
}

body {
  font-family: var(--font-primary);
  background-color: var(--color-white);
  color: var(--color-black-light);
  line-height: 1.6;
}

a {
  text-decoration: none;
  color: inherit;
  transition: color 0.3s ease;
}

ul {
  list-style: none;
}

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

/* Tipografi */
h1, h2, h3, h4, h5, h6 {
  color: var(--color-black);
  margin-bottom: var(--spacing-sm);
  font-weight: 700;
  line-height: 1.2;
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }

p {
  margin-bottom: var(--spacing-sm);
  color: var(--color-gray-dark);
}

/* Konteyner */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-sm);
}

/* Butonlar */
.btn {
  display: inline-block;
  padding: 0.8rem 1.5rem;
  background-color: var(--color-black);
  color: var(--color-white);
  border-radius: var(--radius-sm);
  font-weight: 600;
  text-align: center;
  transition: all 0.3s ease;
  border: 1px solid var(--color-black);
  cursor: pointer;
}

.btn:hover {
  background-color: var(--color-white);
  color: var(--color-black);
}

.btn-outline {
  background-color: transparent;
  color: var(--color-black);
}

.btn-outline:hover {
  background-color: var(--color-black);
  color: var(--color-white);
}

/* Header & Navigasyon */
.header {
  background-color: var(--color-white);
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0;
  z-index: 100;
  padding: var(--spacing-sm) 0;
}

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

.logo {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--color-black);
  letter-spacing: -1px;
}

.nav-links {
  display: flex;
  gap: var(--spacing-md);
}

.nav-links a {
  font-weight: 500;
}

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

/* Hamburger Menü (Mobil) */
.menu-toggle {
  display: none;
  font-size: 1.5rem;
  cursor: pointer;
  background: none;
  border: none;
  color: var(--color-black);
}

/* Bölümler (Sections) */
.section {
  padding: var(--spacing-lg) 0;
}

.section-bg-light {
  background-color: var(--color-gray-bg);
}

.section-title {
  text-align: center;
  margin-bottom: var(--spacing-md);
}

/* Hero Bölümü */
.hero {
  background-color: var(--color-black-light);
  color: var(--color-white);
  padding: var(--spacing-xl) 0;
  text-align: center;
}

.hero h1, .hero p {
  color: var(--color-white);
}

.hero p {
  font-size: 1.2rem;
  max-width: 600px;
  margin: 0 auto var(--spacing-md);
  color: var(--color-gray-light);
}

/* Kartlar (Cards) */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-md);
  align-items: stretch; /* İçeriklerin aynı yükseklikte olmasını garantiler */
}

.card {
  background: var(--color-white);
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  border: 1px solid var(--color-gray-light);
  display: flex;
  flex-direction: column;
  justify-content: center; /* Kart içindeki içeriği dikeyde ortalar */
  height: 100%;
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
}

/* SSS Akordeon */
details {
  background: var(--color-white);
  border: 1px solid var(--color-gray-light);
  border-radius: var(--radius-sm);
  margin-bottom: var(--spacing-xs);
  padding: var(--spacing-sm);
}

summary {
  font-weight: 600;
  cursor: pointer;
  list-style: none; /* Gizle varsayılan oku */
  display: flex;
  justify-content: space-between;
  align-items: center;
}

summary::-webkit-details-marker {
  display: none;
}

summary::after {
  content: '+';
  font-size: 1.2rem;
}

details[open] summary::after {
  content: '-';
}

details p {
  margin-top: var(--spacing-sm);
  margin-bottom: 0;
}

/* Footer */
.footer {
  background-color: var(--color-black);
  color: var(--color-white);
  padding: var(--spacing-md) 0;
  text-align: center;
}

.footer p {
  color: var(--color-gray-light);
  margin-bottom: 0;
}

/* Split Layout (Resim Solda, Metin Sağda) */
.split-layout {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
  align-items: center;
}

.split-img {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  width: 100%;
}

.split-img img {
  margin: 0 auto;
}

/* Mobil Uyum (Responsive) */
@media (max-width: 768px) {
  .nav-links {
    display: none;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background-color: var(--color-white);
    padding: var(--spacing-md);
    box-shadow: var(--shadow-md);
    border-top: 1px solid var(--color-gray-light);
  }
  
  .nav-links.active {
    display: flex;
  }
  
  .menu-toggle {
    display: block;
  }
  
  h1 { font-size: 2rem; }
  .hero { padding: var(--spacing-lg) 0; }
}

@media (min-width: 769px) {
  .split-layout {
    flex-direction: row;
    align-items: center; /* İçerikleri dikey olarak ortalar */
    text-align: left;
  }
  .split-layout > .split-img {
    flex: 1;
    /* position: sticky; kaldırıldı çünkü align-items: center ile daha uyumlu çalışması istendi */
  }
  .split-layout > .split-content {
    flex: 1.5;
  }
}

/* Hero Butonları (Eşit Genişlik & Mobil Uyum) */
.hero-buttons {
  width: 100%;
}
.hero-buttons .btn {
  flex: 1;
  display: flex;
  justify-content: center;
  align-items: center;
}

@media (max-width: 768px) {
  .hero-buttons {
    flex-direction: column;
  }
  .hero-buttons .btn {
    width: 100%;
  }
}

/* Footer Hizmet Bölgeleri Grid */
.footer-regions {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.8rem;
  text-align: center;
  font-size: 0.95rem;
}

@media (max-width: 768px) {
  .footer-regions {
    grid-template-columns: 1fr;
    gap: 0.8rem;
  }
}