* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: Arial, sans-serif;
  background: #f5f5f5;
  color: #333;
}

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: #0077cc;
  color: white;
  padding: 1rem 2rem;
}

nav ul {
  list-style: none;
  display: flex;
  gap: 1rem;
}

nav ul li a {
  color: white;
  text-decoration: none;
}

.cart {
  position: relative;
}

#cart-items {
  position: absolute;
  right: 0;
  background: white;
  color: black;
  padding: 1rem;
  border: 1px solid #ccc;
  width: 200px;
  top: 40px;
}

.hidden {
  display: none;
}

main {
  display: flex;
  padding: 2rem;
}

aside {
  width: 200px;
  margin-right: 2rem;
}

#product-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1.5rem;
  flex: 1;
}

.product {
  background: white;
  padding: 1rem;
  border: 1px solid #ddd;
  border-radius: 8px;
}

.product img {
  width: 100%;
  height: auto;
  border-radius: 4px;
}

.product h4 {
  margin-top: 0.5rem;
}

footer {
  background: #333;
  color: white;
  text-align: center;
  padding: 1rem;
  margin-top: 2rem;
}