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

:root {
  --primary-color: #0066cc;
  --secondary-color: #00a3ff;
  --white: #ffffff;
  --light-bg: #f8fafc;
  --text-dark: #1e293b;
  --text-light: #64748b;
  --border-color: #e2e8f0;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  color: var(--text-dark);
  background-color: var(--white);
  line-height: 1.6;
}

/* ---------------- NAVBAR ---------------- */

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.navbar {
  position: fixed;
  top: 0;
  width: 100%;
  background-color: var(--white);
  box-shadow: var(--shadow-sm);
  z-index: 1000;
}

.navbar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 0;
}

.nav-brand img {
  height: 40px;
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: 2rem;
}

.nav-menu a {
  text-decoration: none;
  color: var(--text-dark);
  font-weight: 500;
}

.nav-menu a:hover {
  color: var(--primary-color);
}

/* ---------------- SECTION FIX (ÖNEMLİ KISIM) ---------------- */

/* Navbar sabit olduğu için tüm section'lar aşağıdan başlar */
section {
  padding: 140px 0 60px;
}

/* Why Us linkine tıklanınca başlık kaybolmasın diye */
#why-us {
  scroll-margin-top: 120px;
}

/* ---------------- WHY US ---------------- */

.why-us {
  background-color: var(--light-bg);
}

.section-header {
  text-align: center;
  margin-bottom: 3rem;
}

.section-header h2 {
  font-size: 2.5rem;
  font-weight: 700;
}

.section-header p {
  color: var(--text-light);
  font-size: 1.125rem;
}

.why-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.why-card {
  background-color: var(--white);
  padding: 2rem;
  border-radius: 12px;
  border-left: 4px solid var(--primary-color);
  box-shadow: var(--shadow-sm);
}

.why-card h4 {
  font-size: 1.25rem;
  margin-bottom: 0.75rem;
}

.why-card p {
  color: var(--text-light);
}

/* ---------------- FOOTER ---------------- */

.footer {
  background-color: #0a1929;
  color: var(--white);
  padding: 3rem 0 1.5rem;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
}

.footer-bottom {
  border-top: 1px solid #1e3a5f;
  margin-top: 2rem;
  padding-top: 1rem;
  text-align: center;
  color: #94a3b8;
}

/* ---------------- RESPONSIVE ---------------- */

@media (max-width: 768px) {
  .nav-menu {
    gap: 1rem;
    font-size: 0.9rem;
  }

  .why-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .nav-menu {
    display: none;
  }
}

.footer-links a,
.footer-services a {
  color: #94a3b8;
  text-decoration: none; /* ALT ÇİZGİYİ KALDIRIR */
  border-bottom: none;   /* Eğer border ile çizilmişse onu da kaldırır */
  transition: color 0.3s;
}

.footer-links a:hover,
.footer-services a:hover {
  color: var(--secondary-color);
  text-decoration: none; /* hover durumunda da çizgi olmasın */
  border-bottom: none;
}