body {
  font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
  line-height: 1.6;
  margin: 0;
  padding: 0;
  background-color: #f9f9f9;
  color: #333;
}
header {
  background-color: #3182CE;
  color: #fff;
  text-align: center;
  padding: 4rem 2rem;
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
}
.logo {
  width: 96px;
  height: auto;
  display: block;
}
.title-wrap {
  text-align: left;
}
@media (max-width: 480px) {
  .logo { width: 72px; }
  header { padding: 2.5rem 1rem; }
  header h1 { font-size: 1.6rem; }
  header p { font-size: 1rem; }
  .title-wrap { text-align: center; }
}
header h1 {
  margin: 0;
  font-size: 2.5rem;
}
header p {
  margin-top: 1rem;
  font-size: 1.2rem;
}
section {
  max-width: 800px;
  margin: 2rem auto;
  padding: 0 2rem;
}
h2 {
  color: #1a202c;
  margin-top: 2rem;
}
ul {
  padding-left: 1.5rem;
}
footer {
  text-align: center;
  padding: 2rem;
  background-color: #e2e8f0;
  color: #555;
  font-size: 0.9rem;
}
a {
  color: #2b6cb0;
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
}