body {
    margin: 0;
    font-family: Arial, sans-serif;
}
.site-header {
    background: linear-gradient(to right, orange, green);
    padding: 20px;
    color: white;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.main-nav ul {
    list-style: none;
    display: flex;
    gap: 15px;
}
.main-nav a {
    color: white;
    text-decoration: none;
}
.hero {
    background: linear-gradient(to right, orange, green);
    color: white;
    text-align: center;
    padding: 60px 20px;
}
.btn {
    background: white;
    color: red;
    padding: 10px 20px;
    text-decoration: none;
    font-weight: bold;
}
.categories {
    display: flex;
    justify-content: space-around;
    padding: 40px 20px;
    background: #f9f4ef;
}
.category-card {
    width: 30%;
    padding: 20px;
    border-radius: 8px;
    color: white;
}
.category-card.red { background: #e74c3c; }
.category-card.orange { background: #e67e22; }
.category-card.gray { background: #7f8c8d; }
.site-footer {
    background: #333;
    color: white;
    text-align: center;
    padding: 20px;
}