:root{
  --g:#1b8f5a;
  --bg:#eef8f3;
  --b:#d8eee2;
}

.gx{
  max-width:900px;
  margin:25px auto;
  padding:28px;
  background:#fff;
  border-radius:16px;
  box-shadow:0 15px 40px rgba(0,0,0,.08);
  font-family:system-ui,Arial;
}

.gx h2{
  text-align:center;
  color:var(--g);
}

.gx p{
  text-align:center;
  color:#555;
}

.grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:18px;
}

@media(max-width:700px){
  .grid{grid-template-columns:1fr}
}

.box label{
  font-size:13px;
  font-weight:600;
}

.box input,
.box select{
  width:100%;
  padding:12px;
  margin-top:6px;
  border:1px solid var(--b);
  border-radius:10px;
}

.btn{
  width:100%;
  margin-top:22px;
  padding:15px;
  background:linear-gradient(135deg,#1b8f5a,#157a4c);
  color:#fff;
  border:none;
  border-radius:12px;
  font-size:16px;
  font-weight:700;
  cursor:pointer;
}

.err{
  display:none;
  margin-top:14px;
  padding:10px;
  background:#fee2e2;
  color:#b91c1c;
  border-radius:10px;
  text-align:center;
  font-weight:600;
}

.res{
  display:none;
  margin-top:26px;
}

.item{
  background:#f1faf6;
  padding:14px;
  border-left:4px solid var(--g);
  border-radius:8px;
  margin-bottom:10px;
}

.note{
  font-size:13px;
  color:#666;
  margin-top:12px;
}