body {
  margin: 0;
  background: #0f172a;
  color: white;
  font-family: Arial, sans-serif;
}

.app {
  max-width: 1000px;
  margin: auto;
  padding: 30px 20px;
}

header {
  margin-bottom: 25px;
}

header p {
  color: #cbd5e1;
}

.summary {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 16px;
}

.box,
.card {
  background: #1e293b;
  border-radius: 16px;
  padding: 20px;
  margin-top: 20px;
}

.box h3 {
  color: #94a3b8;
  margin: 0;
}

.box p {
  font-size: 28px;
  font-weight: bold;
  margin-bottom: 0;
}

input,
select,
button {
  width: 100%;
  box-sizing: border-box;
  margin-top: 12px;
  padding: 12px;
  border-radius: 10px;
  border: none;
  font-size: 15px;
}

button {
  background: #22c55e;
  color: white;
  font-weight: bold;
  cursor: pointer;
}

button:hover {
  background: #16a34a;
}

.product-item {
  background: #334155;
  padding: 14px;
  border-radius: 12px;
  margin-top: 10px;
}

.low {
  color: #f87171;
  font-weight: bold;
}