:root {
  --bg-light: #f9fafb;
  --text-light: #111827;
  --subtext: #4b5563;
  --bg-dark: #1f2937;
  --text-dark: #f3f4f6;
  --primary: #2563eb;
}

body {
  margin: 0;
  font-family: Arial, sans-serif;
  background-color: var(--bg-light);
  color: var(--text-light);
  transition: background-color 0.3s ease, color 0.3s ease;
  opacity: 0;
  transition: opacity 0.6s ease, background-color 0.3s ease, color 0.3s ease;
}

body.loaded {
  opacity: 1;

body.loaded .fade-up {
  opacity: 1;
  transform: none;
}
}

.dark-mode {
  background-color: var(--bg-dark);
  color: var(--text-dark);
}
.dark-mode a {
  color: var(--text-dark);
}

/* Header */
header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
  background-color: var(--bg-light);
  color: var(--text-light);
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 999;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}
.dark-mode header {
  background-color: var(--bg-dark);
  color: var(--text-dark);
}

.logo {
  display: flex;
  align-items: center;
  font-weight: bold;
  font-size: 1.2rem;
}
.logo img {
  height: 40px;
  margin-right: 0.5rem;
  cursor: pointer;
}

.nav-toggle {
  display: none;
}
.hamburger {
  display: none;
  font-size: 1.8rem;
  cursor: pointer;
}

nav {
  display: flex;
  gap: 1.2rem;
  align-items: center;
}
nav a {
  text-decoration: none;
  color: inherit;
  font-weight: bold;
  position: relative;
}
nav a:hover::after {
  content: "";
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--primary);
}

.toggle-theme {
  cursor: pointer;
  font-size: 1.2rem;
}

/* Hero */
.hero {
  text-align: center;
  padding: 6rem 1rem 2rem;
}
.hero h1 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}
.hero p {
  font-size: 1.2rem;
  color: var(--subtext);
  max-width: 600px;
  margin: 0 auto 2rem;
}
.btn {
  display: inline-block;
  padding: 0.7em 1.4em;
  background-color: var(--primary);
  color: white;
  font-weight: bold;
  border: none;
  border-radius: 8px;
  text-decoration: none;
  cursor: pointer;
  transition: background-color 0.3s ease;
}
.btn:hover {
  background-color: #1d4ed8;
}

/* Section */
.section {
  padding: 2rem;
  text-align: center;
}
.section h2 {
  font-size: 2rem;
  margin-bottom: 1.5rem;
}

/* Cards / Services */
.card, .service {
  background-color: var(--bg-light);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  max-width: 720px;
  margin: 1.5rem auto;
  padding: 1.5rem 2rem;
  border-radius: 1rem;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.card:hover, .service:hover {
  transform: translateY(-4px);
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.1);
}
.card h3, .service h3 {
  font-size: 1.3rem;
  margin-bottom: 0.6rem;
  color: var(--text-light);
}
.dark-mode .card, .dark-mode .service {
  background-color: #374151;
}
.dark-mode .card h3, .dark-mode .service h3 {
  color: var(--text-dark);
}
.card p, .service p {
  margin-bottom: 1rem;
  color: var(--subtext);
  font-size: 1rem;
  line-height: 1.6;
}
.dark-mode .card p, .dark-mode .service p {
  color: #d1d5db;
}
.card .btn, .service .btn {
  display: inline-block;
  padding: 0.6em 1.2em;
  background-color: #2563eb;
  color: white;
  font-weight: bold;
  border: none;
  border-radius: 8px;
  text-decoration: none;
  cursor: pointer;
  transition: background-color 0.3s ease;
}
.card .btn:hover, .service .btn:hover {
  background-color: #1d4ed8;
}

/* Footer */
footer {
  text-align: center;
  padding: 1rem;
  font-size: 0.9rem;
  color: var(--subtext);
}

/* Contact Form */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  max-width: 600px;
  margin: 0 auto;
}
.contact-form input,
.contact-form textarea {
  padding: 0.8rem;
  border: 1px solid #ccc;
  border-radius: 8px;
  font-size: 1rem;
  resize: vertical;
  background-color: #fff;
  color: #111;
}
.contact-form button {
  align-self: flex-start;
}

/* Contact Boxes */
.contact-box {
  background-color: #ffffff;
  padding: 1.5rem;
  border-radius: 12px;
}
.dark-mode .contact-box {
  background-color: #1e293b;
  color: var(--text-dark);
}

.dark-mode .contact-form,
.dark-mode .contact-form input,
.dark-mode .contact-form textarea {
  background-color: #374151;
  color: #f3f4f6;
  border: 1px solid #4b5563;
}
.dark-mode .contact-form input::placeholder,
.dark-mode .contact-form textarea::placeholder {
  color: #9ca3af;
}
.dark-mode h2,
.dark-mode h3 {
  color: var(--text-dark);
}
.contact-info h3,
.contact-form h3 {
  color: var(--text-light);
}
.dark-mode .contact-info h3,
.dark-mode .contact-form h3 {
  color: var(--text-dark);
}

/* Form Durum Mesajı */
#form-status {
  display: none;
  margin-top: 1.5rem;
  padding: 0.8rem 1.2rem;
  border-radius: 8px;
  font-weight: 600;
  font-size: 1rem;
  text-align: center;
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}
#form-status.success {
  background-color: #d1fae5;
  color: #065f46;
  border: 1px solid #10b981;
}
#form-status.error {
  background-color: #fee2e2;
  color: #991b1b;
  border: 1px solid #ef4444;
}

/* Blog Header */
.blog-header {
  max-width: 800px;
  margin: 0 auto;
  padding: 6rem 1rem 2rem;
  text-align: center;
}
.blog-hero-image {
  width: 100%;
  max-height: 360px;
  object-fit: cover;
  border-radius: 12px;
  margin-bottom: 1.5rem;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}
.blog-meta {
  color: var(--subtext);
  font-size: 0.95rem;
  margin-bottom: 1rem;
}
.blog-meta .blog-time {
  margin-left: 0.6rem;
}
.blog-title {
  font-size: 2.2rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}
.blog-subtitle {
  font-size: 1.2rem;
  color: var(--subtext);
  margin-bottom: 2rem;
  max-width: 640px;
  margin-left: auto;
  margin-right: auto;
}

/* Responsive */
@media (max-width: 768px) {
  nav {
    position: absolute;
    top: 4.5rem; /* header yüksekliğine göre ayarlanır */
    right: 1.5rem;
    left: 1.5rem;
    z-index: 999;
    overflow: hidden;
    flex-direction: column;
    background-color: var(--bg-light);
    border-radius: 12px;
    padding: 0 1rem;
    max-height: 0;
    opacity: 0;
    pointer-events: none;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
    transition: max-height 0.4s ease, opacity 0.4s ease, padding 0.3s ease;
  }

  nav.nav-visible {
    max-height: 300px;
    opacity: 1;
    padding: 1rem;
    pointer-events: auto;
  }

  nav.nav-hidden {
    max-height: 0;
    opacity: 0;
    padding: 0 1rem;
    pointer-events: none;
  }

  .dark-mode nav {
    background-color: var(--bg-dark);
    box-shadow: 0 8px 24px rgba(255, 255, 255, 0.05);
  }

  .hamburger {
    display: block;
    position: absolute;
    right: 2rem;
    top: 1.5rem;
    z-index: 1000;
  }

  header {
    flex-direction: column;
    align-items: flex-start;
  }
}


/* GSAP animasyonuna hazırlık: sadece fade-up ve faq-card başlangıçta gizli */
.fade-up,
.faq-card {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.4s ease, transform 0.4s ease;
}