.explore_title {
    margin: 0 auto 20px auto;
    padding: 2px 10px 10px 10px;
    text-align: center;
    font: bold 22px Aptima;
    background: darkviolet;
    color: #fff;
    -moz-border-radius: 3px;
        -webkit-border-radius: 3px;
        border-radius: 3px;
}
.explore_title:hover {
    background: purple;
}
.tred {
    background: red;
}
.tgreen {
    background: green;
}
.tblue {
    background: blue;
}

a.action_btn {
    display: block;
    float: right;
    font-weight: bold;
    color: #fff;
    font-size: 13px;
    margin: -5px 0 0 2px;
    padding: 6px 10px;
        -moz-border-radius: 2px;
        -webkit-border-radius: 2px;
        border-radius: 2px;
}
.action_btn:hover {
    color: #fff;
    background: #018CC5;
}
#lib_search {
    margin: 0 0 10px 0;
}
.list_search_level {
    float: right;
}
.list_search_subject {}
.list_search_type {
    float: left;
}
#lib_search select {
    width: 100%;
}
.lib_post_list {
    display: grid;
    margin: 0 -5px;
}
.lib_post_item {
    margin: 0;
    text-align: center;
    font: 17px 'UVNTinTucHepThemBold';
}
.lib_post_item_cover {
    width: 80%;
    position: relative;
    text-align: center;
    margin: 0 auto;
}
.lib_post_item_cover img {
    max-width: 100%;
    max-height: 100%;
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translate(-50%, 0);
    -webkit-box-shadow: 0 1px 3px rgba(0,0,0,0.12), 0 1px 2px rgba(0,0,0,0.24);
		box-shadow: 0 1px 3px rgba(0,0,0,0.12), 0 1px 2px rgba(0,0,0,0.24);
		transition: all 0.3s cubic-bezier(.25,.8,.25,1);
}
.lib_post_item_self img {
    width: 100%;
}
.lib_post_item_thumb {
    text-align: center;
    margin: 0 5px 20px 5px;
}
.lib_post_item_thumb img {
    max-width: 100%;
    margin-bottom: 5px;
    border: 0;
}
#form input[type=text], #form input[type=file], #form select, #form #tag, #form textarea, #form .text-editor {
    width: 100%;
    max-width: 100%;
}
.lib_post_link {
    width: 100%;
    margin: 10px 0;
}

@media screen and (min-width: 1000px) {
    .explore_title {
        width: 300px;
    }
    .list_search_level {
        width: 150px;
    }
    .list_search_type {
        width: 300px;
    }
    .list_search_subject {
        margin-left: 305px;
        margin-right: 155px;
    }
    .lib_post_list {
        grid-template-columns: 1fr 1fr 1fr 1fr 1fr;
    }
    .lib_post_list_thumb {
        grid-template-columns: 1fr 1fr 1fr;
    }
    .lib_post_item_cover {
        height: 220px;
    }
    .lib_main {
        width: 600px;
        margin: 0 auto;
    }
    .lib_post_link {
        height: 800px;
    }
}

@media screen and (max-width: 999px) {
    .explore_title {
        margin: 20px 0;
    }
    .container {
        margin: 0 10px;
    }
    .list_search_level {
        width: 60px;
    }
    .list_search_type {
        width: 100px;
    }
    .list_search_subject {
        margin-left: 105px;
        margin-right: 65px;
    }
    .lib_post_list {
        grid-template-columns: 1fr 1fr 1fr 1fr;
    }
    .lib_post_item_cover {
        height: 240px;
    }
    .lib_post_link {
        height: 600px;
    }
}
@media screen and (max-width: 799px) {
    .lib_post_list {
        grid-template-columns: 1fr 1fr 1fr;
    }
    .lib_post_item_cover {
        height: 260px;
    }
    .lib_post_link {
        height: 500px;
    }
}

@media screen and (max-width: 599px) {
    .lib_post_list {
        grid-template-columns: 1fr 1fr;
    }
    .lib_post_item_cover {
        height: 200px;
    }
}

@media screen and (max-width: 399px) {
    .lib_post_list {
        grid-template-columns: 1fr 1fr;
    }
    .lib_post_item_cover {
        height: 170px;
    }
}