:root {
  /* Renk Paleti (Koyu Tema Varsayılan) */
  --bg-color: #0b0c10;
  --section-bg: #1f2833;
  --text-color: #c5c6c7;
  --white: #ffffff;
  --accent: #66fcf1; /* Neon Mavi */
  --accent-dark: #45a29e;
  
  /* Glassmorphism */
  --glass: rgba(255, 255, 255, 0.05);
  --border: rgba(255, 255, 255, 0.1);
}

body.light {
  --bg-color: #f0f2f5;
  --section-bg: #ffffff;
  --text-color: #333;
  --white: #000;
  --accent: #0077b6;
  --accent-dark: #023e8a;
  --glass: rgba(0, 0, 0, 0.05);
  --border: rgba(0, 0, 0, 0.1);
}

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

body {
  font-family: 'Poppins', sans-serif;
  background-color: var(--bg-color);
  color: var(--text-color);
  line-height: 1.6;
  overflow-x: hidden;
  transition: background 0.3s, color 0.3s;
}

/* Header & Nav */
.header {
  position: fixed;
  top: 0;
  width: 100%;
  padding: 15px 5%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  z-index: 1000;
  background: rgba(11, 12, 16, 0.85); /* Hafif transparan */
  backdrop-filter: blur(10px); /* Buzlu cam efekti */
  border-bottom: 1px solid var(--border);
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--white);
}
.logo span {
  color: var(--accent);
}

.nav {
  display: flex;
  align-items: center;
  gap: 20px;
}

.nav-link {
  color: var(--text-color);
  text-decoration: none;
  font-weight: 500;
  transition: 0.3s;
  position: relative;
}

.nav-link:hover, .nav-link.active {
  color: var(--accent);
}

/* Linkin altındaki çizgi efekti */
.nav-link::after {
  content: '';
  position: absolute;
  width: 0;
  height: 2px;
  bottom: -4px;
  left: 0;
  background-color: var(--accent);
  transition: width 0.3s;
}
.nav-link:hover::after, .nav-link.active::after {
  width: 100%;
}

/* Tema Butonu */
.theme-btn {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--accent);
  padding: 8px 12px;
  border-radius: 20px;
  cursor: pointer;
  font-size: 1rem;
  transition: 0.3s;
}
.theme-btn:hover {
  background: var(--accent);
  color: #000;
}

/* Hamburger Menü (Mobil) */
.hamburger {
  display: none;
  font-size: 1.5rem;
  color: var(--white);
  cursor: pointer;
}

/* Hero Section */
.hero {
  height: 100vh;
  width: 100%;
  /* İSTEDİĞİN GÖRSEL BURADA */
  background: url('https://images.unsplash.com/photo-1451187580459-43490279c0fa?q=80&w=2072&auto=format&fit=crop') no-repeat center center/cover;
  background-attachment: fixed;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  position: relative;
}

/* Görselin üzerine karanlık katman */
.overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(11, 12, 16, 0.7); /* Siyah filtre */
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 800px;
  padding: 0 20px;
}

.hero-content h3 {
  font-size: 1.5rem;
  color: var(--accent);
  margin-bottom: 10px;
}
.hero-content h1 {
  font-size: 3.5rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 15px;
  text-shadow: 0 0 20px rgba(102, 252, 241, 0.3);
}
.hero-content .highlight {
  color: var(--accent);
}

/* Butonlar */
.cta-buttons {
  margin-top: 30px;
}
.btn {
  padding: 12px 30px;
  border-radius: 30px;
  text-decoration: none;
  font-weight: 600;
  margin: 0 10px;
  transition: all 0.3s ease;
  display: inline-block;
}
.btn.primary {
  background: var(--accent);
  color: #0b0c10;
  box-shadow: 0 0 15px rgba(102, 252, 241, 0.4);
}
.btn.primary:hover {
  background: #fff;
  transform: translateY(-3px);
}
.btn.secondary {
  border: 2px solid var(--accent);
  color: var(--accent);
}
.btn.secondary:hover {
  background: var(--accent);
  color: #0b0c10;
}

/* Genel Bölüm Stilleri */
.section {
  padding: 100px 5%;
  min-height: 80vh; /* Her bölüm neredeyse tam ekran */
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.section.alt-bg {
  background-color: var(--section-bg);
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  width: 100%;
}

.section-title {
  text-align: center;
  font-size: 2.5rem;
  margin-bottom: 50px;
  color: var(--white);
  position: relative;
  display: inline-block;
  left: 50%;
  transform: translateX(-50%);
}
.section-title::after {
  content: '';
  display: block;
  width: 60px;
  height: 4px;
  background: var(--accent);
  margin: 10px auto 0;
  border-radius: 2px;
}

/* Hakkımda Liste */
.skills-list {
  list-style: none;
  margin-top: 20px;
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
}
.skills-list li {
  background: var(--glass);
  padding: 10px 20px;
  border: 1px solid var(--border);
  border-radius: 5px;
  color: var(--accent);
  font-weight: 600;
}

/* Hizmet Kartları */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 30px;
}
.card {
  background: var(--glass); /* Transparan */
  padding: 30px;
  border-radius: 15px;
  border: 1px solid var(--border);
  text-align: center;
  transition: 0.3s;
}
.card:hover {
  transform: translateY(-10px);
  border-color: var(--accent);
  box-shadow: 0 10px 30px rgba(0,0,0,0.5);
}
.card .icon {
  font-size: 2.5rem;
  color: var(--accent);
  margin-bottom: 20px;
}

/* Footer */
footer {
  padding: 20px;
  text-align: center;
  background: #000;
  color: #888;
  font-size: 0.9rem;
}

/* Animasyon Sınıfları */
[data-animate] {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.8s ease-out;
}
[data-animate].visible {
  opacity: 1;
  transform: translateY(0);
}

/* RESPONSIVE (Mobil Ayarlar) */
@media (max-width: 768px) {
  .hamburger {
    display: block;
  }
  
  .nav {
    position: fixed;
    top: 60px;
    right: -100%; /* Başlangıçta gizli */
    width: 70%;
    height: 100vh;
    background: var(--bg-color);
    flex-direction: column;
    justify-content: center;
    transition: 0.4s;
    border-left: 1px solid var(--border);
  }
  
  .nav.active {
    right: 0; /* Açılınca ekrana gelir */
  }

  .hero-content h1 {
    font-size: 2.2rem;
  }
  
  .section {
    padding: 60px 5%;
  }
}
/* --- YENİ İLETİŞİM BÖLÜMÜ STİLLERİ --- */

/* Kapsayıcı Düzeni */
.contact-wrapper {
  display: flex;
  flex-wrap: wrap;
  gap: 40px;
  justify-content: center;
  align-items: flex-start;
}

/* Sol Taraf: Bilgi Kartı */
.contact-info-card {
  flex: 1;
  min-width: 300px;
  background: var(--glass);
  padding: 40px;
  border-radius: 15px;
  border: 1px solid var(--border);
}

.contact-info-card h3 {
  font-size: 1.8rem;
  color: var(--white);
  margin-bottom: 15px;
}

.contact-info-card p {
  color: var(--text-color);
  margin-bottom: 30px;
  font-size: 0.95rem;
}

.info-item {
  display: flex;
  align-items: center;
  gap: 15px;
  margin-bottom: 20px;
}

.info-item i {
  font-size: 1.5rem;
  color: var(--accent);
  background: rgba(102, 252, 241, 0.1); /* Hafif arka plan */
  width: 50px;
  height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
}

.info-item h4 {
  font-size: 1.1rem;
  color: var(--white);
}

.info-item a {
  color: var(--text-color);
  text-decoration: none;
  transition: 0.3s;
}

.info-item a:hover {
  color: var(--accent);
}

/* Sosyal Medya İkonları (Büyük) */
.social-links-big {
  margin-top: 30px;
  display: flex;
  gap: 15px;
}
.social-links-big a {
  width: 45px;
  height: 45px;
  background: var(--section-bg);
  color: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 5px;
  border: 1px solid var(--border);
  transition: 0.3s;
  font-size: 1.2rem;
}

.social-links-big a:hover {
  background: var(--accent);
  color: #000;
  transform: translateY(-3px);
}

/* Sağ Taraf: Form */
.contact-form {
  flex: 1.5; /* Form daha geniş olsun */
  min-width: 300px;
}

.form-group {
  margin-bottom: 20px;
}

/* Input ve Textarea Stilleri */
.contact-form input,
.contact-form textarea {
  width: 100%;
  background: var(--glass);
  border: 1px solid var(--border);
  padding: 15px;
  border-radius: 10px;
  color: var(--white);
  font-family: 'Poppins', sans-serif;
  font-size: 1rem;
  outline: none;
  transition: 0.3s;
}

.contact-form input:focus,
.contact-form textarea:focus {
  border-color: var(--accent);
  background: rgba(255, 255, 255, 0.1);
}

.contact-form input::placeholder,
.contact-form textarea::placeholder {
  color: #888;
}

/* Mobilde alt alta geçsin */
@media (max-width: 768px) {
  .contact-wrapper {
    flex-direction: column;
  }
}

html {
  scroll-behavior: smooth;
}