*{box-sizing:border-box}
html,body{margin:0;min-height:100%;font-family:Arial,Helvetica,sans-serif}
body{
  min-height:100vh;
  color:#263b36;
  background:#263b36 url("../images/bg-donlot-center.jpg") center/cover fixed no-repeat;
}
body:before{
  content:"";position:fixed;inset:0;z-index:-1;
  background:rgba(8,25,20,.30);
}
.page-shell{
  width:70%;max-width:1050px;min-width:520px;
  margin:42px auto;padding:22px 26px 38px;
  background:rgba(255,252,244,.80);
  border-radius:18px;
  box-shadow:0 18px 50px rgba(0,0,0,.20);
}
.back-nav{display:flex;justify-content:space-between;gap:12px;margin-bottom:20px}
.back-nav a{
  min-width:110px;padding:9px 14px;border-radius:10px;
  background:rgba(255,255,255,.92);color:#285c4d;
  text-decoration:none;text-align:center;font-weight:700;
  box-shadow:0 3px 10px rgba(0,0,0,.12)
}
.page-header{text-align:center;margin:8px 0 28px}
.page-header h1{margin:0;font-size:clamp(26px,4vw,42px)}
.page-header p{margin:8px 0 0;font-size:14px;opacity:.8}
.icon-grid{
  display:grid;grid-template-columns:repeat(3,minmax(0,1fr));
  gap:18px;
}
.icon-card{
  min-height:220px;padding:14px 12px 17px;
  display:flex;flex-direction:column;align-items:center;
  justify-content:center;text-align:center;text-decoration:none;
  color:#263b36;background:rgba(255,255,255,.92);
  border-radius:16px;box-shadow:0 7px 20px rgba(0,0,0,.13);
  transition:.2s;
}
.icon-card:hover{transform:translateY(-4px)}
.icon-card img{
  width:auto;max-width:100%;height:auto;max-height:145px;
  object-fit:contain;display:block;margin:0 auto 12px
}
.icon-card span{font-size:14px;font-weight:800;line-height:1.25}
.icon-card small{margin-top:5px;font-size:11px;opacity:.72;font-weight:700}
.content-placeholder{
  min-height:300px;padding:40px 24px;border-radius:16px;
  background:rgba(255,255,255,.88);text-align:center;
  box-shadow:0 7px 20px rgba(0,0,0,.10)
}
@media(max-width:900px){
  .page-shell{width:82%}
  .icon-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media(max-width:700px){
  body{background-attachment:scroll}
  .page-shell{width:100%;min-width:0;margin:0;padding:16px 12px 30px;border-radius:0}
  .back-nav a{min-width:0;flex:1}
  .icon-grid{grid-template-columns:1fr;gap:14px}
  .icon-card{min-height:190px}
  .icon-card img{max-height:135px}
}