body {
  font-family: Arial, sans-serif;
  background: #fff;
  color: #444;
  margin: 0;
  padding: 0;
}
header {
  background: #fff;
  border-bottom: 2px solid #fa7a1a;
  padding: 20px 40px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
nav a {
  color: #fa7a1a;
  text-decoration: none;
  font-weight: bold;
  margin-left: 24px;
  transition: color 0.2s;
}
nav a:hover {
  color: #555;
}
main {
  padding: 40px;
  max-width: 900px;
  margin: auto;
}
footer {
  background: #eee;
  text-align: center;
  padding: 12px 0;
  font-size: 0.9em;
  color: #888;
}