body {
    margin: 0;
	padding:  0;
	box-sizing: border-box;
    font: 1.2em;
    font-family: "ヒラギノ角ゴ Pro W3", "Hiragino Kaku Gothic Pro", Osaka,
      "メイリオ", Meiryo, "MS Pゴシック", "MS PGothic", farial, helvetica,
      clean, sans-serif;
    background-color: #f5f5f5;
}

#gallery {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    grid-gap: 20px;
    background-color: rgb(0, 0, 0);
    padding: 20px;
    box-shadow: 0px 2px 4px rgba(0, 0, 0, 0.1);
}

#gallery img {
    width: 100%;
    height: 100%;
    transition: transform 0.2s ease-in-out, filter 0.2s ease-in-out;
}

@media (max-width: 1000px) {
    #gallery {
        grid-template-columns: repeat(1, minmax(0, 1fr));
    }
}