* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Segoe UI', Arial, sans-serif;
}

:root {
  --primary: #0A3B71;      /* Lacivert / gece mavisi */
  --secondary: #00A3C4;    /* Turkuaz */
  --accent: #1EB086;       /* Zümrüt yeşili */
  --bg-light: #FFFFFF;
  --text-dark: #1a1a1a;
  --gradient-main: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 55%, var(--accent) 100%);
}

body {
  color: var(--text-dark);
  line-height: 1.6;
  background-color: var(--bg-light);
}

/* --- Header / Navbar --- */
.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
  background-color: var(--primary);
}

.logo {
  color: #fff;
  font-size: 1.5rem;
  font-weight: bold;
  letter-spacing: 0.5px;
}

.nav-links {
  list-style: none;
  display: flex;
  gap: 1.5rem;
}

.nav-links a {
  color: #fff;
  text-decoration: none;
  transition: color 0.2s ease;
}

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

/* --- Hero Bölümü --- */
.hero {
  background: var(--gradient-main);
  text-align: center;
  padding: 6rem 2rem;
  color: #fff;
}

.hero h1 {
  font-size: 2.8rem;
  margin-bottom: 1rem;
  font-weight: 700;
}

.hero p {
  font-size: 1.2rem;
  margin-bottom: 2rem;
  opacity: 0.95;
}

/* --- CTA Buton --- */
.btn-cta {
  display: inline-block;
  padding: 0.9rem 2.2rem;
  border: none;
  border-radius: 50px;
  background: linear-gradient(135deg, var(--secondary), var(--accent));
  color: #fff;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(0, 163, 196, 0.35);
}

/* --- Genel Section Stili --- */
section {
  padding: 4rem 2rem;
  max-width: 1100px;
  margin: 0 auto;
}

section h2 {
  color: var(--primary);
  font-size: 2rem;
  margin-bottom: 1.5rem;
  position: relative;
  display: inline-block;
}

section h2::after {
  content: "";
  display: block;
  width: 60px;
  height: 4px;
  margin-top: 0.5rem;
  background: var(--gradient-main);
  border-radius: 2px;
}

/* --- Kartlar (Hizmetler için) --- */
.card {
  background: #fff;
  border: 1px solid #eee;
  border-radius: 12px;
  padding: 1.5rem;
  border-top: 4px solid transparent;
  border-image: var(--gradient-main) 1;
  box-shadow: 0 4px 12px rgba(10, 59, 113, 0.06);
  transition: transform 0.2s ease;
}

.card:hover {
  transform: translateY(-4px);
}

/* --- Footer --- */
footer {
  text-align: center;
  padding: 1.5rem;
  background-color: var(--primary);
  color: #fff;
}

footer a {
  color: var(--secondary);
}

/* --- Kart Grid Yapısı --- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
  margin-top: 1rem;
}

.card {
  background: #fff;
  border: 1px solid #eee;
  border-radius: 12px;
  padding: 1.8rem;
  border-top: 4px solid var(--secondary);
  box-shadow: 0 4px 12px rgba(10, 59, 113, 0.06);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 20px rgba(10, 59, 113, 0.12);
  border-top-color: var(--accent);
}

.card h3 {
  color: var(--primary);
  margin-bottom: 0.7rem;
  font-size: 1.2rem;
}

.card p {
  font-size: 0.95rem;
  color: #444;
}

/* --- Hamburger Buton (varsayılan gizli) --- */
.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 28px;
  height: 20px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
}

.menu-toggle span {
  display: block;
  height: 3px;
  width: 100%;
  background-color: #fff;
  border-radius: 2px;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.menu-toggle.active span:nth-child(1) {
  transform: translateY(8.5px) rotate(45deg);
}
.menu-toggle.active span:nth-child(2) {
  opacity: 0;
}
.menu-toggle.active span:nth-child(3) {
  transform: translateY(-8.5px) rotate(-45deg);
}

/* --- Responsive --- */
@media (max-width: 700px) {
  .navbar {
    position: relative;
  }

  .menu-toggle {
    display: flex;
  }

  .nav-links {
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    flex-direction: column;
    background-color: var(--primary);
    text-align: center;
    gap: 0;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
  }

  .nav-links.active {
    max-height: 300px;
  }

  .nav-links li {
    padding: 1rem 0;
    border-top: 1px solid rgba(255,255,255,0.1);
  }

  .hero h1 {
    font-size: 2rem;
  }
}

/* --- İletişim Bölümü --- */
.contact-wrapper {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 2.5rem;
  margin-top: 1.5rem;
}

.contact-info p {
  margin-bottom: 1rem;
  color: #333;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.contact-form input,
.contact-form textarea {
  padding: 0.9rem 1rem;
  border: 1px solid #ddd;
  border-radius: 8px;
  font-size: 1rem;
  font-family: inherit;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--secondary);
  box-shadow: 0 0 0 3px rgba(0, 163, 196, 0.15);
}

.contact-form button {
  align-self: flex-start;
}

@media (max-width: 700px) {
  .contact-wrapper {
    grid-template-columns: 1fr;
  }
}