#portfolio{width:100%;max-width:1200px;margin:0 auto;padding:40px;width:100%;max-width:1200px;margin:0 auto;color:#000000;position:relative}.grid{width:100%;max-width:1100px;margin:auto}.button-group{margin:40px auto;display:flex;flex-wrap:wrap;justify-content:center}@media (max-width: 767px){.button-group{margin-top:100px}}.button{padding:10px 15px;border-radius:5px;border:0;color:#333;cursor:pointer;background-color:#eee;margin:5px;flex:1}.button:hover{background-color:#ccc;color:#fff}.button.is-checked{background:green;color:#fff}.element-item{background-color:#fff;padding:0;margin:10px;width:calc(33.33% - 20px);display:inline-block;vertical-align:top}.element-item .item-image{width:100%;padding-bottom:100%;background-size:cover;background-position:center center}.element-item .item-title{margin:10px 0;padding:10px;height:auto;overflow:hidden;font-size:20px;text-align:center}body{background-color:#1d1e22}