/* Genel */
body {
  margin: 0;
  padding: 0;
  font-family: 'Segoe UI', sans-serif;
  background: #0d0d0d;
  color: #eee;
  line-height: 1.6;
}

a {
  color: #66b2ff;
  text-decoration: none;
}
a:hover {
  color: #3399ff;
}

/* Navbar */
header {
  position: fixed;
  width: 100%;
  background: rgba(0,0,0,0.85);
  padding: 15px 40px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  z-index: 1000;
}
.logo {
  font-size: 1.2rem;
  font-weight: bold;
  color: #66b2ff;
}

.nav-links {
  list-style: none;
  display: flex;
  gap: 20px;
}
.nav-links li a {
  color: #eee;
  transition: color 0.3s;
}
.nav-links li a:hover {
  color: #3399ff;
}

/* Hero */
.hero {
  text-align: center;
  padding: 160px 20px 100px; /* navbar çakışmasını önlemek için */
}
.hero h1 {
  font-size: 2.6rem;
  margin-bottom: 20px;
  font-weight: bold;
  letter-spacing: 1px;
}
.hero h1 span {
  color: #3399ff;
}
.hero p {
  font-size: 1.2rem;
  color: #ccc;
  margin-bottom: 25px;
  line-height: 1.8;
}

/* Hero Butonları */
.hero-buttons {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: center;
}
.btn {
  display: inline-block;
  padding: 12px 20px;
  background: #1a1a1a;
  border: 1px solid #3399ff;
  color: #66b2ff;
  border-radius: 8px;
  transition: all 0.3s;
  font-size: 1rem;
}
.btn:hover {
  background: #3399ff;
  color: #fff;
}
.btn-icon {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 45px;
  height: 45px;
  background: #1a1a1a;
  border: 1px solid #3399ff;
  border-radius: 50%;
  color: #66b2ff;
  font-size: 1.3rem;
  transition: all 0.3s;
}
.btn-icon:hover {
  background: #3399ff;
  color: #fff;
}

/* Bölümler */
.section {
  padding: 100px 40px;
  max-width: 1000px;
  margin: auto;
}
.section h2 {
  color: #66b2ff;
  font-size: 1.9rem;
  margin-bottom: 30px;
}

/* Genel paragraflar */
.section p {
  font-size: 1.2rem;
  color: #ddd;
  line-height: 1.8;
}

/* Eğitim & Deneyim yazıları */
#education ul li,
#experience ul li {
  font-size: 1.15rem;
  color: #ddd;
  margin-bottom: 10px;
  line-height: 1.8;
}

/* Proje Kartları */
.project-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
}
.project-card {
  background: #1a1a1a;
  padding: 20px;
  border-radius: 12px;
  border: 1px solid #333;
  transition: transform 0.3s, border-color 0.3s;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}
.project-card:hover {
  transform: translateY(-8px);
  border-color: #3399ff;
}
.project-card h3 {
  margin-top: 0;
  color: #66b2ff;
}
.project-card p {
  flex-grow: 1;
  margin-bottom: 15px;
  font-size: 1.1rem;
  color: #ccc;
  line-height: 1.6;
}
.project-card .btn {
  align-self: flex-start;
}

/* Beceriler */
.skills {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.skills span {
  background: #222;
  border: 1px solid #444;
  padding: 8px 15px;
  border-radius: 6px;
  transition: all 0.3s;
  color: #66b2ff;
  font-size: 1rem;
}
.skills span:hover {
  background: #3399ff;
  color: #fff;
  transform: scale(1.1);
}

/* Listeler (Sertifika, Gönüllülük, Eğitim vs.) */
.section ul {
  list-style: none;
  padding: 0;
}
.section ul li {
  font-size: 1.15rem;
  margin-bottom: 10px;
  color: #ddd;
  line-height: 1.8;
}

/* Footer */
footer {
  background: #111;
  text-align: center;
  padding: 20px;
  margin-top: 40px;
  color: #888;
  font-size: 0.95rem;
}

/* Bölüm kutuları - renkli modern stil */
.section {
  border-radius: 16px;
  padding: 100px 40px;
  margin: 60px auto;
  max-width: 1100px;
  position: relative;
  overflow: hidden;
  color: #eee;
  box-shadow: 0 8px 25px rgba(0,0,0,0.4);
  transition: transform 0.3s, box-shadow 0.3s;
}
.section:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 30px rgba(0,0,0,0.6);
}

/* Farklı bölümlere gradient arka plan */
#about {
  background: linear-gradient(135deg, #1e3c72, #3f78da); /* mavi tonlar */
}
#education {
  background: linear-gradient(135deg, #283c86, #3cc18c); /* yeşil-mavi */
}
#experience {
  background: linear-gradient(135deg,#1d92c4, #b584e0); /* mor tonlar */
}
#projects {
  background: linear-gradient(135deg, #1d4252, #66adcb); /* koyu mavi-gri */
}
#skills {
  background: linear-gradient(135deg, #35c9bd, #65ef9a); /* yeşil */
}
#certificates {
  background: linear-gradient(135deg, #243960, #37597f); /* lacivert */
}
#volunteering {
  background: linear-gradient(135deg, #a98be3, #7accd2, #ffd4b7); /* pembe-turuncu */
}
#contact {
  background: linear-gradient(135deg, #4daddc, #414345); /* siyah-gri */
}

/* Başlıklar biraz parlak olsun */
.section h2 {
  color: #fff;
  font-size: 2rem;
  margin-bottom: 25px;
  text-align: center;
  position: relative;
}
.section h2::after {
  content: "";
  display: block;
  width: 60px;
  height: 3px;
  background: rgba(255,255,255,0.8);
  margin: 12px auto 0;
  border-radius: 2px;
}

/* Paragraflar daha okunur */
.section p, .section li {
  color: #f2f2f2;
}