.merkezler-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 25px;
}
.merkez-card {
  cursor: pointer;
  overflow: hidden;
  border-radius: 12px;
  display: flex;
  flex-direction: column;
  height: 280px;
  background: #000;
  position: relative;
}
.merkez-bg {
  flex: 1;
  background-size: cover;
  background-position: center;
  transition: transform .3s ease, filter .3s ease;
}
.merkez-footer {
  background: #f2f2f2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 18px;
  transition: background .3s ease;
}
.merkez-title { color: #000; }
.merkez-icon { color: #000; transition: color .3s ease; }
.merkez-card:hover .merkez-footer { background: #c00; }
.merkez-card:hover .merkez-title,
.merkez-card:hover .merkez-icon { color: #fff; }
.merkez-card:hover .merkez-bg { transform: scale(1.05); filter: brightness(1.1); }

/* Popup */
.merkez-modal {
  display: none;
  position: fixed;
  z-index: 9999;
  top: 0; left: 0;
  width: 100%; height: 100%;
  background: rgba(0,0,0,0.9);
  justify-content: center;
  align-items: center;
  overflow-y: auto;
}
.merkez-modal-content {
  background: #fff;
  max-width: 800px;
  width: 90%;
  padding: 40px;
  border-radius: 10px;
  position: relative;
  animation: fadeIn .3s ease;
}
.merkez-modal-content img {
  width: 100%;
  border-radius: 10px;
  margin-bottom: 20px;
}
.merkez-modal-content h2 {
  color: #c00;
  margin-bottom: 10px;
}
.merkez-close {
  position: absolute;
  top: 15px; right: 20px;
  font-size: 34px;
  color: #333;
  cursor: pointer;
}
@keyframes fadeIn {
  from {opacity: 0; transform: scale(0.95);}
  to {opacity: 1; transform: scale(1);}
}