body {
  font-family: sans-serif;
  background: #f9f9f9;
  color: #333;
}
.container {
  max-width: 600px;
  margin: 2rem auto;
  background: #fff;
  padding: 1.5rem;
  border-radius: 8px;
  box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}
label, select, input {
  display: block;
  margin-top: 1rem;
  width: 100%;
}
button {
  margin-top: 1.5rem;
  padding: 0.6rem 1rem;
  font-weight: bold;
}

.catalog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 1rem;
}
.product-item {
  background: #eef;
  padding: 1rem;
  border-radius: 6px;
  box-shadow: 0 1px 5px rgba(0,0,0,0.1);
}
.product-item input {
  width: 100%;
  margin-top: 0.5rem;
}

.scrollable {
  max-height: 400px;
  overflow-y: auto;
  padding-right: 10px;
}
.controls {
  display: flex;
  gap: 1rem;
  margin: 1rem 0;
}
.controls input, .controls select {
  flex: 1;
}