body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
}

header {
  background: #4caf50;
  color: white;
  padding: 1rem;
}

nav ul {
  list-style: none;
  padding: 0;
  display: flex;
  gap: 1rem;
}

nav a {
  color: white;
  text-decoration: none;
  font-weight: bold;
}

nav a.active {
  text-decoration: underline;
}

main {
  padding: 2rem;
}

section {
  margin-bottom: 3rem;
}

article {
  border: 1px solid #ddd;
  padding: 1rem;
  margin-bottom: 1rem;
  border-radius: 8px;
  background: #f9f9f9;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
  margin-top: 1rem;
  border-radius: 6px;
}

footer {
  background: #f1f1f1;
  padding: 1rem;
  text-align: center;
}

/* Button styles */
button {
  background: #6a4caf;
  color: white;
  border: none;
  padding: 8px 12px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 14px;
  transition: background 0.3s ease;
}

button:hover {
  background: #50348a;
}

button:disabled {
  background: #ccc;
  cursor: not-allowed;
}