body {
  margin: 0;
  padding: 0;
  font-family: 'Segoe UI', Arial, sans-serif;
  background: #f8f9fa;
  color: #222;
}
.container {
  max-width: 600px;
  margin: 40px auto;
  background: #fff;
  border-radius: 12px;
  box-shadow: 0 2px 16px rgba(0,0,0,0.07);
  padding: 32px 24px;
}
header {
  text-align: center;
  margin-bottom: 32px;
}
.subtitle {
  color: #4a90e2;
  font-size: 1.2em;
  margin-top: 8px;
}
h1, h2 {
  margin: 0 0 12px 0;
}
ul {
  padding-left: 20px;
}
section {
  margin-bottom: 28px;
}
a {
  color: #4a90e2;
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
}
footer {
  text-align: center;
  color: #888;
  font-size: 0.95em;
  margin-top: 32px;
}
@media (max-width: 700px) {
  .container {
    margin: 16px;
    padding: 18px 8px;
  }
}