body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f8fff0;
    color: #333;
}
header {
    background-color: #9acd32;
    padding: 1rem;
    text-align: center;
    color: white;
}
nav ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    background-color: #dfffdf;
}
nav ul li {
    margin: 0;
}
nav ul li a {
    display: block;
    padding: 0.75rem 1.5rem;
    text-decoration: none;
    color: #333;
}
nav ul li a:hover {
    background-color: #b0e57c;
}
main {
    padding: 1rem;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 1rem;
}
.card {
    background-color: white;
    padding: 1rem;
    border-radius: 8px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}