:root {
  --lacivert: #1a2a8c;
  --kirmizi: #e3101e;
  --yazi: #1f2430;
  --soluk: #5b6272;
  --zemin: #ffffff;
  --gri: #f3f4f7;
  --cizgi: #e2e4ea;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  color: var(--yazi);
  background: var(--zemin);
  line-height: 1.6;
}
img { max-width: 100%; display: block; }
a { color: var(--lacivert); }

.kutu { max-width: 1040px; margin: 0 auto; padding: 0 16px; }
.bolum { padding: 56px 16px; }
.bolum.gri { background: var(--gri); }
h2 { font-size: 1.7rem; margin: 0 0 8px; color: var(--lacivert); }
h3 { font-size: 1rem; margin: 0 0 4px; }

/* Üst menü */
.ust { background: #fff; border-bottom: 3px solid var(--kirmizi); position: sticky; top: 0; z-index: 10; }
.ust-ic { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.marka { display: flex; align-items: center; gap: 10px; text-decoration: none; font-weight: 700; color: var(--lacivert); }
.marka img { height: 43px; width: auto; }
nav { display: flex; gap: 20px; }
nav a { text-decoration: none; font-weight: 600; color: var(--yazi); }
nav a:hover { color: var(--kirmizi); }

/* Giriş */
.giris {
  background: linear-gradient(180deg, #ffffff 0%, var(--gri) 100%);
  border-bottom: 1px solid var(--cizgi);
  text-align: center;
  padding: 56px 16px 52px;
}
.giris-logo { margin: 0 auto 22px; width: 170px; height: auto; border-radius: 3px; box-shadow: 0 6px 20px rgba(26, 42, 140, .18); }
.giris h1 { margin: 0; font-size: 2.2rem; color: var(--lacivert); }
.giris p { margin: 6px 0 0; color: var(--soluk); }

/* Proje */
.adres { color: var(--soluk); margin-top: 0; }
.olculer { display: grid; grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); gap: 12px; margin: 24px 0; }
.olculer div { border: 1px solid var(--cizgi); border-left: 4px solid var(--kirmizi); padding: 12px 14px; border-radius: 4px; }
.olculer b { display: block; font-size: 1.3rem; color: var(--lacivert); }
.olculer span { font-size: .85rem; color: var(--soluk); }
.planlar { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 16px; margin-bottom: 24px; }
.planlar img { border: 1px solid var(--cizgi); border-radius: 4px; width: 100%; }
details { border: 1px solid var(--cizgi); border-radius: 4px; padding: 12px 16px; margin-bottom: 10px; }
summary { cursor: pointer; font-weight: 600; }
details ul { margin: 10px 0 0; padding-left: 20px; }

/* Galeri */
.not { color: var(--soluk); margin-top: 0; }
.galeri { display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 10px; }
.galeri a { aspect-ratio: 4 / 3; overflow: hidden; border-radius: 4px; background: #ddd; }
.galeri img { width: 100%; height: 100%; object-fit: cover; transition: transform .2s; }
.galeri a:hover img { transform: scale(1.05); }

/* İletişim */
.iletisim { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 24px; margin-top: 16px; }
.iletisim p { margin: 0 0 14px; }

footer { background: var(--lacivert); color: #fff; padding: 18px 0; font-size: .9rem; text-align: center; }

/* Büyük fotoğraf */
.buyuk { position: fixed; inset: 0; background: rgba(0,0,0,.9); display: flex; align-items: center; justify-content: center; z-index: 100; padding: 16px; }
.buyuk[hidden] { display: none; }
.buyuk figure { margin: 0; text-align: center; }
.buyuk img { max-width: 90vw; max-height: 80vh; margin: 0 auto; image-rendering: auto; min-width: min(500px, 90vw); object-fit: contain; }
.buyuk figcaption { color: #ddd; margin-top: 10px; }
.buyuk button { background: none; border: 0; color: #fff; font-size: 3rem; cursor: pointer; padding: 0 12px; line-height: 1; }
.buyuk .kapat { position: absolute; top: 10px; right: 10px; }
.buyuk .ok { position: absolute; top: 50%; transform: translateY(-50%); }
.buyuk .sol { left: 4px; }
.buyuk .sag { right: 4px; }

@media (max-width: 560px) {
  .marka span { display: none; }
  nav { gap: 14px; }
  .giris h1 { font-size: 1.7rem; }
  .galeri { grid-template-columns: repeat(2, 1fr); }
}