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

header {
    background-color: #4CAF50;
    color: white;
    padding: 1em 0;
    text-align: center;
}

main {
    padding: 1em;
}

.intro {
    text-align: center;
    margin-bottom: 2em;
}

.gallery {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-around;
}

.item {
    background-color: white;
    border: 1px solid #ddd;
    border-radius: 5px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    margin: 1em;
    max-width: 300px;
    text-align: center;
    padding: 1em;
}

.item img {
    max-width: 100%;
    height: auto;
    border-bottom: 1px solid #ddd;
    margin-bottom: 1em;
}

footer {
    background-color: #4CAF50;
    color: white;
    text-align: center;
    padding: 1em 0;
    position: fixed;
    width: 100%;
    bottom: 0;
}