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

body {
  font-family: system-ui, sans-serif;
  background: #ffffff;
  color: #111111;
  line-height: 1.6;
  padding: 2rem;
  max-width: 900px;
  margin: 0 auto;
}

header {
  text-align: center;
  margin-bottom: 3rem;
}

h1 {
  font-size: 2.5rem;
  letter-spacing: 1px;
  color: #000;
}

.tagline {
  font-size: 1.2rem;
  margin-top: 0.5rem;
  color: #555;
}

nav {
  margin-top: 1rem;
}

nav a {
  margin: 0 0.5rem;
  text-decoration: none;
  color: #000;
  font-weight: bold;
  border-bottom: 2px solid transparent;
  transition: all 0.2s ease;
}

nav a:hover {
  border-bottom: 2px solid goldenrod;
}

section {
  margin-bottom: 3rem;
}

.hero h2 {
  font-size: 1.75rem;
  margin-bottom: 1rem;
  color: #222;
}

.product-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  margin-top: 1rem;
}

.product-box {
  flex: 1 1 250px;
  border: 1px solid #ddd;
  border-radius: 12px;
  padding: 1rem;
  background: #f9f9f9;
  transition: box-shadow 0.2s ease;
}

.product-box:hover {
  box-shadow: 0 0 0 2px goldenrod;
}

.product-box h4 {
  margin-bottom: 0.5rem;
  font-size: 1.1rem;
  color: #111;
}

footer {
  text-align: center;
  padding-top: 2rem;
  font-size: 0.9rem;
  color: #999;
}