body {
  font-family: 'Segoe UI', sans-serif;
  margin: 0;
  padding: 0;
  background: #f4f4f4;
  color: #333;
}

.container {
  max-width: 900px;
  margin: auto;
  padding: 20px;
  background: white;
  box-shadow: 0 0 10px rgba(0,0,0,0.05);
}

header {
  text-align: center;
  margin-bottom: 30px;
}

h1 {
  font-size: 2.5em;
  margin: 0;
  color: #2c3e50;
}

.tagline {
  font-size: 1.2em;
  color: #777;
}

main section {
  margin-bottom: 30px;
}

h2 {
  color: #34495e;
  margin-bottom: 10px;
}

ul {
  padding-left: 20px;
}

footer {
  text-align: center;
  font-size: 0.9em;
  color: #aaa;
  margin-top: 40px;
}