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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

.categories {
    text-align: center;
    margin-bottom: 20px;
}

.category-btn {
    padding: 10px 20px;
    margin: 5px;
    border: none;
    background-color: #ddd;
    cursor: pointer;
    border-radius: 5px;
}

.category-btn.active {
    background-color: #007bff;
    color: white;
}

.gallery {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.gallery img {
    width: calc(33.333% - 10px);
    height: auto;
    border-radius: 5px;
    transition: transform 0.2s;
}

.gallery img:hover {
    transform: scale(1.05);
}

.pagination {
    text-align: center;
    margin-top: 20px;
}

.pagination button {
    padding: 10px 20px;
    margin: 5px;
    border: none;
    background-color: #007bff;
    color: white;
    cursor: pointer;
    border-radius: 5px;
}

.pagination button:disabled {
    background-color: #ccc;
    cursor: not-allowed;
}

@media (max-width: 768px) {
    .gallery img {
        width: calc(50% - 10px);
    }
}

@media (max-width: 480px) {
    .gallery img {
        width: 100%;
    }
}