body {
  font-family: "Helvetica", sans-serif;
  background: #f9f9f9;
  margin: 0;
  padding: 0;
  color: #333;
}
header {
  background: #07c160;
  color: white;
  padding: 20px;
  text-align: center;
}
nav {
  background: #ffffff;
  padding: 10px;
  text-align: center;
  border-bottom: 1px solid #ddd;
}
nav a {
  margin: 0 15px;
  color: #333;
  text-decoration: none;
}
.container {
  max-width: 960px;
  margin: auto;
  padding: 20px;
  background: white;
}
.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
}
.product-card {
  border: 1px solid #ddd;
  padding: 15px;
  background: #fff;
  border-radius: 8px;
}
.product-card img {
  width: 100%;
  height: 180px;
  object-fit: cover;
  border-radius: 4px;
}
footer {
  text-align: center;
  font-size: 14px;
  padding: 30px 10px;
  color: #777;
  background: #f1f1f1;
}
.button {
  display: inline-block;
  background: #07c160;
  color: white;
  padding: 10px 20px;
  border-radius: 5px;
  text-decoration: none;
}