@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;600;800&family=Outfit:wght@400;700;900&display=swap');

:root {
  /* Dark Tech Color Palette */
  --bg-base: #09090b;          /* Çok koyu arka plan */
  --bg-primary: #0f172a;       /* Derin gece mavisi */
  --text-primary: #f8fafc;     /* Parlak beyaz/gri */
  --text-secondary: #94a3b8;   /* Soluk gri */
  
  --accent-cyan: #0ea5e9;      /* Elektrik mavisi */
  --accent-purple: #8b5cf6;    /* Neon Mor */
  --accent-hover: #38bdf8;
  
  --gradient-brand: linear-gradient(135deg, var(--accent-cyan), var(--accent-purple));
  
  /* Glassmorphism Variables */
  --glass-bg: rgba(15, 23, 42, 0.65);
  --glass-border: rgba(255, 255, 255, 0.08);
  --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
  
  --transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

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

body {
  font-family: 'Inter', sans-serif;
  background-color: var(--bg-base);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  
  /* Hafif arka plan desenleri için radial gradient */
  background-image: 
    radial-gradient(circle at 15% 50%, rgba(14, 165, 233, 0.08) 0%, transparent 50%),
    radial-gradient(circle at 85% 30%, rgba(139, 92, 246, 0.08) 0%, transparent 50%);
  background-attachment: fixed;
}

h1, h2, h3, h4, h5, h6, .brand-font {
  font-family: 'Outfit', sans-serif;
}

a {
  text-decoration: none;
  color: inherit;
  transition: var(--transition);
}

/* Navbar (Glassmorphism) */
.navbar {
  position: fixed;
  top: 0;
  width: 100%;
  padding: 1rem 5%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  
  background: rgba(9, 9, 11, 0.7);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--glass-border);
  z-index: 1000;
  height: 80px;
}

.logo {
  font-size: 1.8rem;
  font-weight: 900;
  color: var(--text-primary);
  letter-spacing: 0.5px;
}

.logo span {
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.nav-links {
  display: flex;
  gap: 2.5rem;
  list-style: none;
}

.nav-links a {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-secondary);
  position: relative;
  padding: 0.5rem 0;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text-primary);
}

.nav-links a::after {
  content: '';
  position: absolute;
  width: 0;
  height: 2px;
  bottom: 0;
  left: 0;
  background: var(--gradient-brand);
  transition: var(--transition);
}

.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}

/* Layout Elements */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 8rem 5% 4rem;
  min-height: calc(100vh - 80px);
}

/* Hero Section */
.hero {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-start;
  min-height: 75vh;
}

.hero-subtitle {
  color: var(--accent-cyan);
  font-family: 'Outfit', sans-serif;
  font-weight: 700;
  letter-spacing: 3px;
  text-transform: uppercase;
  margin-bottom: 1rem;
  animation: fadeInDown 0.8s ease forwards;
}

.hero-title {
  font-size: clamp(3.5rem, 6vw, 6rem);
  font-weight: 900;
  line-height: 1.1;
  margin-bottom: 1.5rem;
  animation: fadeInUp 0.8s ease 0.2s forwards;
  opacity: 0;
  color: var(--text-primary);
}

.hero-title .highlight {
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-description {
  color: var(--text-secondary);
  font-size: 1.25rem;
  max-width: 600px;
  margin-bottom: 2.5rem;
  animation: fadeInUp 0.8s ease 0.4s forwards;
  opacity: 0;
}

.btn-group {
  display: flex;
  gap: 1.5rem;
  animation: fadeInUp 0.8s ease 0.6s forwards;
  opacity: 0;
}

.btn {
  padding: 1rem 2.5rem;
  border-radius: 50px;
  font-family: 'Outfit', sans-serif;
  font-weight: 700;
  font-size: 1.05rem;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  border: none;
  transition: var(--transition);
}

.btn-primary {
  background: var(--gradient-brand);
  color: white;
  box-shadow: 0 4px 15px rgba(14, 165, 233, 0.3);
}

.btn-primary:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 8px 25px rgba(14, 165, 233, 0.5);
}

.btn-secondary {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: var(--accent-cyan);
  transform: translateY(-3px);
}

/* Generic Section Styles */
.section-title {
  font-size: 2.5rem;
  margin-bottom: 3.5rem;
  position: relative;
  display: inline-block;
  color: var(--text-primary);
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 0;
  width: 60px;
  height: 4px;
  background: var(--gradient-brand);
  border-radius: 2px;
}

/* Glass Card */
.glass-card {
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  border-radius: 16px;
  padding: 2.5rem;
  transition: var(--transition);
  box-shadow: var(--glass-shadow);
}

.glass-card:hover {
  transform: translateY(-5px);
  border-color: rgba(14, 165, 233, 0.3);
  box-shadow: 0 12px 40px 0 rgba(0, 0, 0, 0.5);
}

/* Footer */
footer {
  text-align: center;
  padding: 3rem 2rem;
  color: var(--text-secondary);
  background-color: #050505;
  border-top: 1px solid var(--glass-border);
  font-size: 1rem;
}

.social-links {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  margin-bottom: 1.5rem;
}

.social-links a {
  font-size: 1.8rem;
  color: var(--text-secondary);
  transition: var(--transition);
}

.social-links a:hover {
  color: var(--accent-cyan);
  transform: scale(1.1) translateY(-3px);
}

/* Specific Page Layouts */
.about-content { display: grid; grid-template-columns: 1fr; gap: 3rem; margin-top: 2rem; }
.about-text { font-size: 1.1rem; color: var(--text-primary); line-height: 1.8; }
.about-text p { margin-bottom: 1.5rem; }
.highlight-box {
  border-left: 4px solid var(--accent-cyan);
  padding-left: 1.5rem; margin: 2rem 0;
  background: rgba(255, 255, 255, 0.05);
  padding-top: 1rem; padding-bottom: 1rem;
  border-radius: 0 8px 8px 0;
}
.resume-grid { display: grid; grid-template-columns: 1fr; gap: 2rem; margin-top: 2rem; }
@media (min-width: 768px) { .resume-grid { grid-template-columns: 1fr 1fr; } }
.timeline { position: relative; padding-left: 2rem; margin-top: 1rem; }
.timeline::before { content: ''; position: absolute; left: 0; top: 0; height: 100%; width: 2px; background: var(--glass-border); }
.timeline-item { position: relative; margin-bottom: 2rem; }
.timeline-item::before { content: ''; position: absolute; left: -2.35rem; top: 0.2rem; width: 1rem; height: 1rem; background: var(--accent-cyan); border-radius: 50%; border: 3px solid var(--bg-primary); }
.timeline-date { color: var(--accent-cyan); font-size: 0.875rem; font-weight: 600; margin-bottom: 0.5rem; }
.timeline-title { font-size: 1.25rem; color: var(--text-primary); margin-bottom: 0.5rem; font-weight: 700; }
.timeline-desc { color: var(--text-secondary); font-size: 0.95rem; }
.skills-grid { display: flex; flex-wrap: wrap; gap: 1rem; margin-top: 1rem; }
.skill-tag { background: rgba(255, 255, 255, 0.05); border: 1px solid var(--glass-border); padding: 0.5rem 1rem; border-radius: 50px; font-size: 0.9rem; color: var(--text-primary); }
.projects-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 2rem; margin-top: 2rem; }
.project-card { padding: 0; overflow: hidden; display: flex; flex-direction: column; background: var(--glass-bg); }
.project-img { width: 100%; aspect-ratio: 16 / 9; height: auto; background: rgba(255, 255, 255, 0.05); border-bottom: 1px solid var(--glass-border); display: flex; align-items: center; justify-content: center; color: var(--accent-cyan); font-size: 3rem; overflow: hidden; }
.project-content { padding: 1.5rem; flex: 1; display: flex; flex-direction: column; }
.project-title { font-size: 1.25rem; margin-bottom: 0.5rem; color: var(--text-primary); font-weight: 700;}
.project-desc { color: var(--text-secondary); font-size: 0.95rem; margin-bottom: 1.5rem; flex: 1; }
.project-tags { display: flex; gap: 0.5rem; flex-wrap: wrap; margin-bottom: 1.5rem; }
.project-tag { font-size: 0.75rem; color: white; background: var(--gradient-brand); padding: 0.2rem 0.6rem; border-radius: 4px; font-weight: bold;}

/* Helper & Layout Classes (Optimizasyon) */
.hero-split { flex-direction: row; justify-content: space-between; align-items: center; gap: 3rem; flex-wrap: wrap; }
.hero-text { flex: 1; min-width: 300px; }
.hero-image-container { flex: 1; min-width: 300px; display: flex; justify-content: center; align-items: center; animation: fadeInUp 0.8s ease 0.4s forwards; opacity: 0; }
.profile-photo { width: 100%; max-width: 380px; aspect-ratio: 1/1; object-fit: cover; border-radius: 50%; border: 4px solid var(--accent-cyan); box-shadow: 0 0 50px rgba(14, 165, 233, 0.5), inset 0 0 20px rgba(139, 92, 246, 0.5); filter: contrast(1.15) brightness(0.9) saturate(0.85); transition: transform 0.4s ease, box-shadow 0.4s ease; }
.profile-photo:hover { transform: scale(1.02); box-shadow: 0 0 60px rgba(14, 165, 233, 0.7), inset 0 0 25px rgba(139, 92, 246, 0.7); }
.project-img { width: 100%; aspect-ratio: 16 / 9; height: auto; background: rgba(255, 255, 255, 0.05); border-bottom: 1px solid var(--glass-border); display: flex; align-items: center; justify-content: center; overflow: hidden; padding: 0; }
.project-thumbnail { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s ease; }
.project-card:hover .project-thumbnail { transform: scale(1.05); }
.project-top { object-position: top; }
.project-center { object-position: center; }
.harita-form { display: flex; flex-wrap: wrap; gap: 2rem; margin-top: 2rem; align-items: flex-start; }
.harita-kapsayici { flex: 1; min-width: 300px; border-radius: 16px; overflow: hidden; box-shadow: var(--glass-shadow); border: 1px solid var(--glass-border); }
.iletisim-form { flex: 1; min-width: 300px; background: var(--glass-bg); padding: 2.5rem; border-radius: 16px; box-shadow: var(--glass-shadow); border: 1px solid var(--glass-border); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); }
.iletisim-row-content { margin-bottom: 1.5rem; }
.iletisim-row-content label { display: block; margin-bottom: 0.5rem; font-weight: bold; color: var(--text-primary); }
.iletisim-row-content input, .iletisim-row-content textarea { width: 100%; padding: 0.8rem; border: 1px solid var(--glass-border); border-radius: 8px; font-family: inherit; background: rgba(0,0,0,0.2); color: white;}
.iletisim-row-content input::placeholder, .iletisim-row-content textarea::placeholder { color: rgba(255,255,255,0.4); }
.iletisim-row-content input:focus, .iletisim-row-content textarea:focus { outline: none; border-color: var(--accent-cyan); }
.gonder-btn { width: 100%; background: var(--gradient-brand); color: white; padding: 1rem; border: none; border-radius: 8px; font-weight: bold; cursor: pointer; font-size: 1.1rem; transition: var(--transition); }
.gonder-btn:hover { transform: translateY(-2px); box-shadow: 0 4px 15px rgba(14, 165, 233, 0.4); }

/* Animations */
@keyframes fadeInDown {
  from { opacity: 0; transform: translateY(-20px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Responsive */
@media (max-width: 768px) {
  .navbar {
    flex-direction: column;
    padding: 1rem;
    gap: 0.5rem;
    height: auto;
    position: relative;
  }
  .nav-links {
    gap: 1rem;
    flex-wrap: wrap;
    justify-content: center;
    padding-bottom: 0.5rem;
  }
  .container {
    padding: 2rem 5% 4rem;
  }
  .hero-title {
    font-size: 2.8rem;
  }
  .btn-group {
    flex-direction: column;
    width: 100%;
  }
  .btn {
    width: 100%;
    justify-content: center;
  }
  .projects-grid {
    grid-template-columns: 1fr;
  }
  .harita-form {
    flex-direction: column;
  }
}