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

body{
  height: 100vh;
}

.nav{
  width: 100%;
  position: fixed;
  top: 0;
  left: 0;
  display: flex;
  align-items: center;
  justify-content: center; 
  padding: 20px 50px;
  background: rgba(0, 0, 0, 0.2); 
  backdrop-filter: blur(10px); 
  z-index: 1000;
}

.logo{
  position: absolute;
  font-size: 26px;
  color: white;
  font-weight: 700;
  left: 50px;
  letter-spacing: 2px;
}

.logo span{
  color: #8B5CF6; 
}

.menü{
  display: flex;
  gap: 50px; 
  list-style: none;
}

.menü li a{
  color: #ffffff;
  position: relative;
  font-weight: 500;
  font-size: 18px;
  text-decoration: none;
  letter-spacing: 1px;
  transition: 0.3s;
  padding-bottom: 8px;
}

.menü li a::after{
  content: '';
  position: absolute;
  width: 0;
  height: 1px;
  bottom: 0;
  left: 0;
  background-color: #b8b8ff; 
  transition: 0.4s ease;
}

.menü li a:hover::after{
  width: 100%; 
}

.menü li a:hover{
  font-weight: bold;
  color: #b8b8ff;
}

.gezegen{
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 0 8%;
  position: relative;
}

.arka-kisim{
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  z-index: -1;
}

.icerik{
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 80px;
}

.icerik.ters{
  display: flex;
  flex-direction: row-reverse;
  align-items: center;
  justify-content: space-between;
  gap: 80px;
}

.yazi{
  position: relative;
}

.icerik .yazi{
  left: -30px;
}

.icerik.ters .yazi{
  left: auto;
  right: -40px;
}

.yazi h1{
  font-size: 80px;
  color: #f28538;
  margin-bottom: 20px;
  font-weight: 600;
}

.yazi p{
  font-size: 18px;
  color: #d1d1d1;
  line-height: 1.8;
}

.bilgi-kutusu{
  display: flex;
  gap: 15px;
  margin-top: 30px;
}

.bilgi-karti{
  background: rgba(255,255,255,0.05);
  padding: 15px 20px;
  border-radius: 12px;
  border-left: 3px solid #f28538;
}

.etiket{
  font-size: 12px;
  color: #888;
}

.deger{
  font-size: 16px;
  color: #ffffff;
  font-weight: bold;
  display: block;
  margin-top: 5px;
}

.cerceve {
  width: 600px;
  height: 480px;
  border-radius: 45px;
  overflow: hidden;
  border: 1px solid rgba(255,255,255,0.1);
  box-shadow: 0 0 20px 8px rgba(173, 216, 230, 0.5);
}

.cerceve img{
  width: 100%;
  height: 100%;
  object-fit: cover;
}



/* 📱 MOBİL DÜZEN – GEZEGEN SAYFASI */
@media (max-width: 768px) {

  body {
    overflow-x: hidden;
  }

  /* NAVBAR */
  .nav {
    flex-direction: column;
    padding: 15px 20px;
  }

  .logo {
    position: static;
    margin-bottom: 10px;
  }

  .menü {
    flex-direction: column;
    gap: 15px;
  }

  /* GEZEGEN BÖLÜMLERİ */
  .gezegen {
    min-height: auto;
    padding: 100px 20px;
  }

  /* İÇERİK TEK SÜTUN */
  .icerik,
  .icerik.ters {
    flex-direction: column;
    gap: 30px;
  }

  /* YAZI */
  .icerik .yazi,
  .icerik.ters .yazi {
    left: 0;
    right: 0;
    text-align: center;
  }

  .yazi h1 {
    font-size: 32px;
  }

  .yazi p {
    font-size: 16px;
  }

  /* BİLGİ KUTULARI */
  .bilgi-kutusu {
    flex-direction: column;
    align-items: center;
  }

  .bilgi-karti {
    width: 100%;
    max-width: 280px;
    text-align: center;
  }

  /* RESİM */
  .cerceve {
    width: 100%;
    height: auto;
    max-width: 320px;
    margin: 0 auto;
  }

  .cerceve img {
    width: 100%;
    height: auto;
  }

}