body {
    font-family: sans-serif; margin: 0; padding: 0; background: #f9f9f9;
}
header {
    background: #4caf50; color: white; padding: 1rem; text-align: center;
}
nav a {
    margin: 0 1rem; color: white; text-decoration: none;
}
section {
    margin: 1rem auto; padding: 1rem; max-width: 800px; background: white; border-radius: 8px;
}
footer {
    text-align: center; padding: 1rem; background: #4caf50; color: white;
}
.search {
    padding: 0.5rem; width: calc(100% - 1rem); margin: 0.5rem 0;
}