body {
    font-family: Arial, sans-serif;
    margin: 0; padding: 0;
    background: #f4f4f4;
    color: #333;
}

header, footer {
    background: #222;
    color: #fff;
    text-align: center;
    padding: 1em;
}

main {
    padding: 20px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
}

.box {
    background: #fff;
    padding: 15px;
    border-radius: 8px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.carousel img {
    display: none;
    width: 100%;
    border-radius: 8px;
}

.carousel img.active {
    display: block;
}