body {
  font-family: system-ui, sans-serif;
  margin: 0;
  background: #f4f4f9;
  color: #222;
}
h1, h2, h3 {
  text-align: center;
}
button {
  padding: 0.5rem 1rem;
  border: none;
  border-radius: 8px;
  background: #4f46e5;
  color: white;
  cursor: pointer;
  transition: 0.2s;
}
button:hover {
  background: #4338ca;
}
.card {
  border-radius: 12px;
  background: white;
  padding: 1rem;
  box-shadow: 0 2px 6px rgba(0,0,0,0.1);
  margin: 0.5rem;
}
.inventory {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.item {
  border: 1px solid #ddd;
  padding: 0.5rem;
  border-radius: 8px;
  text-align: center;
}
.admin {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.9);
  color: white;
  padding: 2rem;
  overflow-y: auto;
}