body {
  margin: 0; /* Sayfa kenar boşluklarını kaldır */
  height: 100vh; /* Yüksekliği ekranın tamamı yap */
  background-image: url('nilüfer.jpg'); /* Arka plan resmi */
  background-repeat: no-repeat; /* Resim tekrar etmesin */
  background-size: cover; /* Resim tüm alanı kaplasın */
  background-position: center; /* Resim ortalansın */
  background-attachment: fixed; /* Resim sabit kalsın (isteğe bağlı) */
  overflow-x: hidden; /* Yatay kaydırmayı engeller */
}

.container {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 90vh;
}

.zigzag-buttons {
  display: flex;
  flex-direction: row;
  gap: 200px;
}

.round-button {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  border: none;
  background-color: #17886c;
  color: white;
  font-size: 20px;
  cursor: pointer;
  position: relative;
  z-index: 5;
  transition: background-color 0.5s;
}

.round-button:hover {
  background-color: #11614d;
}

/* Zigzag efekt */
.round-button:nth-child(odd) {
  top: -80px;
}

.round-button:nth-child(even) {
  top: 80px;
}

/* Dikey çizgi */
.round-button::before {
  content: '';
  position: absolute;
  top: -600px;
  left: 50%;
  transform: translateX(-50%);
  width: 18px;
  height: 600px;
  background-color: #11614d;
  z-index: 0;
}

.dügme {
  position: fixed;
  top: 0;
  left: 0;
  padding: 50px 30px;
  background-color: transparent;
  z-index: 9999;
}

.dügme ul {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  gap: 15px;
}

.dügme ul li a {
  color: antiquewhite;
  font-size: 44px;
  text-decoration: none;
  padding: 6px 13px;
  display: block;
}

.dügme ul li a.active,
.dügme ul li a:hover {
  background-color: #18775f;
  border-radius: 4px;
  transition: background-color 0.5s;
}

.fade-down {
  opacity: 0;
  transform: translateY(-100px);
  animation: slideDown 1.2s ease-out forwards;
}

@keyframes slideDown {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.header {
  position: relative;
  z-index: 10;
}

/* Ortadaki büyük buton */
.round-button:nth-child(3) {
  width: 160px;
  height: 160px;
  font-size: 24px;
  z-index: 2;
  transform: scale(1.4);
}



/* --------- ACİL DÜZELTME: ARKA PLAN + ANASAYFA + HEADER ÇAKIŞMA (MOBİL) --------- */
/* ===== MOBİL HEADER ve MENÜ DÜZELTME ===== */
@media (max-width: 768px) {

  .header header {
    position: relative;       /* static yerine relative daha güvenli */
    width: 100%;             /* viewport genişliğine göre tam genişlik */
    max-width: 100%;          /* taşmayı önler */
    text-align: center;
    background-color: #17886c;
    color: white;
    padding: 70px 0;         /* yatay padding yok */
    margin: 0;
    box-sizing: border-box;
    border-radius: 0;
    }

  /* ANA SAYFA TUŞU: Header'ın solunda, sabit değil */
  .dügme {
    position: absolute;
    top: 15px;
    left: 0px;
    z-index: 999;
  }

  .dügme ul {
    margin: 0;
    padding: 0;
    list-style: none;
  }

  .dügme ul li a {
    background: #18775f;
    border-radius: 6px;
    font-size: 18px;
    padding: 5px 10px;
    color: antiquewhite;
    text-decoration: none;
  }

  /* Düğmeler: dikey ortada hizalanır */
  .container {
    width: 100%;
    padding-top: 80px; /* header boşluğu kadar */
    display: flex;
    justify-content: center;
    align-items: center;
  }

  .zigzag-buttons {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 25px;
    position: relative;
  }

  /* Dikey çizgi: ortalanmış */
  .zigzag-buttons::before {
    content: '';
    position: absolute;
    top: -160px;
    left: 50%;
    transform: translateX(-50%);
    width: 10px;
    height: 120%;
    background-color: #11614d;
    z-index: 0;
    border-radius: 5px;
  }

  /* Buton boyutları */
  .round-button {
    width: 90px;
    height: 90px;
    font-size: 16px;
    border-radius: 50%;
    border: none;
    background-color: #17886c;
    color: white;
    z-index: 2;
    position: relative;
  }

  .round-button:nth-child(3) {
    width: 110px;
    height: 110px;
    font-size: 18px;
  }

  /* Arka plan */
  body {
    background-image: url('nilüfer.jpg') !important;
    background-repeat: no-repeat !important;
    background-size: cover !important;
    background-position: center center !important;
    background-attachment: scroll !important;
    min-height: 100vh !important;
    margin: 0;
    padding: 0;
    overflow-x: hidden;
    box-sizing: border-box;
  }
}