body {
  font-family: system-ui, Arial, sans-serif;
  margin: 0;
  background: #f6f4ef;
  color: #222;
  line-height: 1.5;
}

header {
  background: #222;
  color: white;
  padding: 20px;
}

nav a {
  color: white;
  margin-right: 16px;
  text-decoration: none;
  font-weight: 600;
}

nav a:hover {
  text-decoration: underline;
}

main {
  max-width: 800px;
  margin: 40px auto;
  padding: 0 20px;
}

.card {
  background: white;
  border: 1px solid #ddd;
  padding: 24px;
  border-radius: 12px;
  margin-bottom: 20px;
}

.button {
  display: inline-block;
  background: #222;
  color: white;
  padding: 10px 16px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 600;
}

.button:hover {
  background: #444;
}