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

header {
    text-align: center;
    padding: 20px;
    background-color: #fff;
    border-bottom: 1px solid #ddd;
}

#photo-gallery {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 15px;
    padding: 20px;
    max-width: 1200px;
    margin: 20px auto;
}

.photo-item {
    border: 1px solid #ddd;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    transition: transform 0.2s ease-in-out;
}

.photo-item:hover {
    transform: translateY(-5px);
}

.photo-item img {
    width: 100%;
    height: auto;
    display: block;
}

.loading {
    text-align: center;
    grid-column: 1 / -1;
}