@-ms-viewport {
    width: device-width;
}

@media only screen and (min-device-width:800px) {
    html {
        overflow: hidden;
    }
}

html {
    height: 100%;
}

body {
    height: 100%;
    overflow: hidden;
    margin: 0;
    padding: 0;
    font-family: Arial, Helvetica, sans-serif;
    font-size: 16px;
    color: #FFFFFF;
    background-color: #000000;
}

ul {
    padding: 0;
    margin: 0;
    list-style: none;
}

.list-group-thumbnail {
    position: fixed;
    background-color: rgba(0, 0, 0, 0.5);
    width: 100%;
    min-height: 110px;
    bottom: -100%;
    opacity: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.5s;
}

.list-group-thumbnail.show {
    bottom: 70px;
    opacity: 1;
}

.list-group-thumbnail ul {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
}

.list-group-thumbnail ul li {
    cursor: pointer;
    width: 212px;
    height: 100px;
    border: 3px solid rgb(255, 255, 255);
    box-sizing: border-box;
    overflow: hidden;
}

@media screen and (max-width: 790px) {
    .list-group-thumbnail ul li {
        width: 170px;
        height: 80px;
    }
}

.list-group-thumbnail ul li {
    margin: 7px;
}

.list-group-thumbnail ul li:hover,
.list-group-thumbnail ul li.active {
    border-color: rgb(255, 153, 51);
}

.list-group-thumbnail ul li img {
    width: 100%;
}

.thumbnail-info {
    position: relative;
}

.thumbnail-title {
    position: absolute;
    width: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    text-align: center;
    bottom: 4px;
    font-size: 13px;
    display: none;
}

#btn-thumb {
    position: fixed;
    bottom: 15px;
    left: 15px;
    width: 50px;
    cursor: pointer;
    display: none;
}

#btn-thumb.show {
    display: block;
}

#btn-thumb img {
    width: 100%;
    height: auto;
}