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

body {
  font-family: "Poppins", sans-serif;
  background-color: #f9fafc;
  color: #222;
  line-height: 1.6;
}

header {
  background: linear-gradient(135deg, #0078ff, #00b6ff);
  color: white;
  text-align: center;
  padding: 2rem 1rem;
  border-bottom: 3px solid #006fd6;
}

header h1 {
  font-size: 2.4rem;
  margin-bottom: 0.5rem;
}

nav a {
  color: white;
  text-decoration: none;
  margin: 0 10px;
  font-weight: 500;
}

nav a:hover {
  text-decoration: underline;
}

.intro {
  text-align: center;
  padding: 2rem 1rem;
}

.category-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
  padding: 2rem;
}

.card {
  background: white;
  border-radius: 12px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
  overflow: hidden;
  transition: transform 0.2s ease;
}

.card:hover {
  transform: translateY(-6px);
}

.card img {
  width: 100%;
  height: 180px;
  object-fit: cover;
}

.card h3 {
  font-size: 1.2rem;
  margin: 0.8rem;
}

.card p {
  padding: 0 1rem 1.2rem;
  font-size: 0.95rem;
}

.card a {
  color: #0078ff;
  text-decoration: none;
  font-weight: 600;
}

footer {
  text-align: center;
  padding: 1.5rem;
  background-color: #111;
  color: #ddd;
  font-size: 0.9rem;
}