/* ========================================
   1. Base Reset & Typography
   ======================================== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  background-color: var(--bg-page);
  color: var(--text-on-background);
  line-height: var(--line-height-normal);
  overflow-x: hidden;
  letter-spacing: var(--letter-spacing-tight);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* ========================================
   2. Navigation
   ======================================== */
nav {
  position: fixed; /* DÜZELTME: 'sticky' yerine 'fixed' */
  top: 0;
  left: 0;
  right: 0;
  width: 100%;
  background-color: rgba(255, 255, 255, 0.98);
  -webkit-backdrop-filter: blur(var(--space-3));
  backdrop-filter: blur(var(--space-3));
  box-shadow: var(--shadow-sm);
  z-index: 1000;
  min-height: var(--space-16);
}
.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--space-4) var(--space-6);
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.logo {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  color: var(--brand-primary);
  text-decoration: none;
}
.nav-links {
  display: flex;
  gap: var(--space-2);
  list-style: none;
  align-items: center;
}
.nav-links a {
  text-decoration: none;
  color: var(--text-on-surface);
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-lg);
  transition: all 0.2s ease;
  font-weight: var(--font-weight-medium);
  font-size: var(--font-size-base);
}
.nav-links a:hover {
  background-color: var(--brand-primary-light);
  color: var(--brand-on-primary-container);
}
.nav-cta {
  background-color: var(--brand-primary) !important;
  color: var(--brand-on-primary) !important;
  padding: var(--space-3) var(--space-6) !important;
  border-radius: var(--radius-pill) !important;
}
.nav-cta:hover {
  background-color: var(--brand-primary-dark) !important;
  box-shadow: var(--shadow-md);
}
.mobile-nav-toggle {
  display: none;
  background: none;
  border: none;
  font-size: var(--font-size-2xl);
  color: var(--text-on-surface);
  cursor: pointer;
}

/* ========================================
   3. Footer
   ======================================== */
footer {
  background: var(--brand-primary);
  color: var(--brand-on-primary);
  padding: var(--space-6) var(--space-6) var(--space-4);
  text-align: center;
  margin-top: auto;
}
.footer-content {
  max-width: 1200px;
  margin: 0 auto;
}
.footer-content p {
  opacity: 0.9;
}
.footer-content a {
  color: var(--brand-on-primary);
  text-decoration: none;
  font-weight: var(--font-weight-medium);
}

.footer-title {
  color: var(--brand-on-primary) !important;
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--space-4);
}

.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-links li {
  margin-bottom: var(--space-2);
}

.footer-links a {
  color: var(--brand-on-primary);
  text-decoration: none;
  transition: opacity 0.3s ease;
  opacity: 0.9;
}

.footer-links a:hover {
  opacity: 1;
  text-decoration: underline;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-2);
  color: var(--brand-on-primary);
}

.contact-item i {
  color: var(--brand-on-primary);
  opacity: 0.9;
}

.contact-link,
.whatsapp-link {
  color: var(--brand-on-primary) !important;
  text-decoration: none;
  transition: opacity 0.3s ease;
}

.contact-link:hover,
.whatsapp-link:hover {
  opacity: 0.8;
  text-decoration: underline;
}

.footer-divider {
  border-color: rgba(255, 255, 255, 0.2);
  margin: var(--space-8) 0;
}

.company-link {
  color: var(--brand-on-primary) !important;
  text-decoration: underline;
  font-weight: var(--font-weight-semibold);
}

.company-link:hover {
  opacity: 0.8;
}

.copyright {
  opacity: 0.7;
  font-size: var(--font-size-xs);
  margin-top: var(--space-2);
  padding-top: var(--space-2);
  border-top: 1px solid rgba(255, 255, 255, 0.2);
}

/* ========================================
   4. Main Content
   ======================================== */
main {
  flex-grow: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-10) var(--space-6);
  margin-top: 70px; /* DÜZELTME: Sabit menü için üst boşluk */
}

/* ========================================
   5. Responsive & Media Queries
   ======================================== */

/* Tablet */
@media (max-width: 992px) {
  /* Örnek: navigation linkleri küçültme */
  .nav-links a {
    padding: var(--space-2) var(--space-4);
    font-size: var(--font-size-sm);
  }
}

/* Mobile */
@media (max-width: 600px) {
  /* Örnek: mobil menü açma */
  .nav-links {
    display: none;
  }
  .mobile-nav-toggle {
    display: block;
  }
}