#gallery{width:auto;margin:20px auto;text-align:center}
#gallery .photos img{width:100%;max-width:300px;display:none}
#gallery .photos img:first-child{display:block}
.buttons_gallery{margin-bottom:20px}
.buttons_gallery,.buttons_gallery *{color:#000}
.photos{display:flex;justify-content:center}
.buttons_gallery button{text-decoration:underline;border:1px solid #3ae141;padding:1px 22px;border-radius:24px;background:#dcffe0}
.buttons_gallery button:hover{text-decoration:none;border:1px solid #174a19;background:#f9fff9}