body {
  font-family: 'Segoe UI', Arial, sans-serif;
  background: #f7f7fa;
  color: #222;
  margin: 0;
  padding: 0;
}
header {
  background: #1a237e;
  color: #fff;
  padding: 24px 0 12px 0;
  box-shadow: 0 2px 8px rgba(26,35,126,0.08);
}
header .container {
  display: flex;
  flex-direction: column;
  align-items: center;
}
header h1 {
  margin: 0 0 8px 0;
  font-size: 2.2rem;
  letter-spacing: 1px;
}
nav {
  margin-bottom: 8px;
}
nav a {
  color: #fff;
  text-decoration: none;
  margin: 0 16px;
  font-weight: 500;
  transition: color 0.2s;
}
nav a:hover {
  color: #ffb300;
}
main {
  max-width: 700px;
  margin: 40px auto 0 auto;
  background: #fff;
  border-radius: 10px;
  box-shadow: 0 2px 16px rgba(26,35,126,0.07);
  padding: 32px 28px;
}
.about ul {
  list-style: none;
  padding: 0;
}
.about li {
  margin-bottom: 8px;
}
footer {
  background: #222;
  color: #fff;
  text-align: center;
  padding: 18px 0;
  margin-top: 40px;
}
.container {
  width: 90%;
  max-width: 1100px;
  margin: 0 auto;
}
@media (max-width: 600px) {
  main {
    padding: 18px 6px;
  }
  header h1 {
    font-size: 1.3rem;
  }
}