body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  line-height: 1.6;
  color: #333;
  background: #f9f9f9;
}
header, footer {
  background: #2c3e50;
  color: #fff;
  padding: 1rem;
}
header nav a, footer a {
  color: #fff;
  margin: 0 10px;
  text-decoration: none;
}
.container {
  width: 90%;
  max-width: 1100px;
  margin: auto;
  padding: 1rem;
}
h1, h2, h3 {
  color: #2c3e50;
}
.card {
  background: #fff;
  margin: 1rem 0;
  padding: 1rem;
  border-radius: 8px;
  box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}
form input, form textarea, form button {
  display: block;
  width: 100%;
  padding: 10px;
  margin: 10px 0;
  border-radius: 5px;
  border: 1px solid #ccc;
}
form button {
  background: #2c3e50;
  color: #fff;
  border: none;
  cursor: pointer;
}
@media (max-width: 768px) {
  nav {
    display: flex;
    flex-direction: column;
  }
}