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

body {
  font-family: 'Segoe UI', sans-serif;
  background-color: #f0f2f5;
  color: #222;
  line-height: 1.6;
}

.container {
  max-width: 900px;
  margin: auto;
  padding: 2rem 1rem;
}

header {
  text-align: center;
  margin-bottom: 2rem;
}

header h1 {
  font-size: 2.5rem;
  color: #1a1a1a;
}

.subtitle {
  font-size: 1.2rem;
  color: #555;
}

.card {
  background: #fff;
  padding: 1.8rem;
  margin-bottom: 1.5rem;
  border-radius: 12px;
  box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

.card h2 {
  color: #1a1a1a;
  margin-bottom: 1rem;
  border-left: 5px solid #0070f3;
  padding-left: 10px;
}

.card h3 {
  margin-top: 1rem;
  color: #333;
}

.card h3 span {
  float: right;
  font-size: 0.9rem;
  color: #666;
}

ul {
  list-style-type: disc;
  margin-left: 1.5rem;
  margin-top: 0.5rem;
}

a {
  color: #0070f3;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.grid {
  display: flex;
  gap: 2rem;
}

.grid ul {
  flex: 1;
}

footer {
  text-align: center;
  color: #888;
  margin-top: 3rem;
  font-size: 0.9rem;
}