*{
  box-sizing:border-box;
  margin:0;
  padding:0;
  font-family:system-ui, Arial;
}

body{
  background:#f4f7fb;
  color:#072029;
}

/* HEADER */
.facility-header{
  text-align:center;
  padding:70px 20px 40px;
}

.facility-header h1{
  font-size:36px;
  margin-bottom:8px;
}

.facility-header p{
  color:#6b7280;
}

/* GALLERY */
.gallery{
  max-width:1200px;
  margin:auto;
  padding:20px;
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(250px,1fr));
  gap:20px;
}

.gallery-item{
  position:relative;
  cursor:pointer;
  overflow:hidden;
}

.gallery-item img{
  width:100%;
  height:260px;
  object-fit:cover;
  transition:.4s;
}

.gallery-item:hover img{
  transform:scale(1.08);
}

/* CAPTION */
.gallery-item span{
  position:absolute;
  bottom:0;
  width:100%;
  padding:10px;
  background:rgba(0,0,0,.6);
  color:#fff;
  font-size:14px;
}

/* LIGHTBOX */
#lightbox{
  position:fixed;
  inset:0;
  background:rgba(0,0,0,.8);
  display:none;
  align-items:center;
  justify-content:center;
  z-index:2000;
}

#lightbox img{
  max-width:90%;
  max-height:90%;
  border-radius:6px;
}
.back-btn{
  display:inline-block;
  margin:20px auto 10px;
  padding:10px 22px;
  background:#0b6b4f;
  color:#fff;
  text-decoration:none;
  border-radius:999px;
  font-weight:600;
  transition:background .3s;
}
.back-btn:hover{
  background:#09543e;
}