:root {
  --bg: #ffffff;
  --text: #111;
  --card: #f0f0f0;
}
[data-theme="dark"] {
  --bg: #1e1e1e;
  --text: #f0f0f0;
  --card: #2e2e2e;
}
body {
  margin: 0;
  font-family: sans-serif;
  background: var(--bg);
  color: var(--text);
}
header {
  padding: 1rem;
  background: var(--card);
  text-align: center;
}
.top-bar {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 10px;
}
.top-bar input, .top-bar select {
  padding: 0.5rem;
  border-radius: 6px;
}
button {
  padding: 0.5rem 1rem;
  cursor: pointer;
}
.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
  padding: 1rem;
}
.card {
  background: var(--card);
  padding: 1rem;
  border-radius: 8px;
  text-align: center;
}
.card img {
  width: 100px;
  height: 100px;
  object-fit: contain;
}
.card button {
  margin: 5px;
}
.product-detail {
  padding: 2rem;
  max-width: 600px;
  margin: auto;
  background: var(--card);
  border-radius: 10px;
}
.auth-body {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  background: var(--bg);
}
.auth-container {
  background: var(--card);
  padding: 2rem;
  border-radius: 8px;
  text-align: center;
}
.auth-container input {
  display: block;
  width: 100%;
  margin: 10px 0;
  padding: 10px;
}