:root {
  --primary: #4a90e2;
  --bg: #f0f4f8;
  --card-bg: #ffffff;
  --text: #333;
  --accent: #0077cc;
}

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

body {
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

.container {
  max-width: 900px;
  margin: auto;
  padding: 2rem;
}

header {
  background: var(--primary);
  color: white;
  text-align: center;
  padding: 2rem 1rem;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.2);
}

header h1 {
  font-size: 2.5rem;
  margin-bottom: 0.5rem;
}

.card {
  background: var(--card-bg);
  border-radius: 12px;
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
  transition: transform 0.3s;
}

.card:hover {
  transform: scale(1.02);
}

.card h2 {
  color: var(--primary);
  margin-bottom: 1rem;
}

ul {
  list-style: disc;
  margin-left: 1.5rem;
}

ul.grid {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 0.75rem;
  padding-left: 0;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

footer {
  text-align: center;
  padding: 1.5rem;
  background: #222;
  color: #ddd;
  margin-top: 2rem;
}