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

/* Base */
body {
  font-family: Arial, sans-serif;
  line-height: 1.6;
  color: #333;
}

header nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background-color: #004080;
  padding: 1em;
  color: white;
}

.logo {
  height: 40px;
}

.search {
  flex: 1;
  margin: 0 1em;
  padding: 0.5em;
  border-radius: 4px;
  border: none;
}

.nav-links a {
  color: white;
  margin-left: 1em;
  text-decoration: none;
}

.hero {
  background-color: #f4f4f4;
  text-align: center;
  padding: 4em 2em;
}

.hero h1 {
  font-size: 2.5em;
  margin-bottom: 0.5em;
}

.grid {
  display: flex;
  flex-wrap: wrap;
  gap: 1em;
  justify-content: center;
  padding: 2em;
}

.card, .product-card, .seller-card {
  background: #fff;
  border: 1px solid #ccc;
  padding: 1em;
  text-align: center;
  width: 200px;
  border-radius: 8px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.1);
}

.product-card img, .seller-card img {
  width: 100%;
  height: 140px;
  object-fit: cover;
  margin-bottom: 1em;
}

section h2 {
  text-align: center;
  margin-top: 2em;
  color: #004080;
}

footer {
  text-align: center;
  padding: 1.5em;
  background: #004080;
  color: white;
  margin-top: 2em;
}