body {
    position: relative;
    display: flex;
}
li {
    list-style: none;
}
a {
    text-decoration: none;
}
a:hover {
    transition: all 0.2s ease;
}
label {
    font-size: .85em;
}
.fa-bell {
    position: relative;
}
.fa-home {
    margin-right: 5px;
}
.circle {
    position: absolute;
    background: #fd4545;
    width: .5em;
    height: .5em;
    right: 0;
    top: 0;
    border: 2px solid #fff;    
}
.aside_menu {
    background: #444;
    height: 100vh;
    width: 210px;
}
.menu i {
    width: 25px;
    font-size: .8em;
}
.aside_menu .logo {
    font-size: 1.2em;
}
.aside_menu li {
    position: relative;
    background-color: #4c4c4c;
    font-size: 1em;
}
.aside_menu li:hover {
    opacity: .85;
    transition: all 0.2s ease;
}
.aside_menu li.active, .aside_menu li:hover {
    background-color: #171717;
}
.aside_menu li .fa-angle-down, .aside_menu li .fa-angle-up {
    position: absolute;
    right: 15px;
    width: auto;
}
.aside_close {
    display: none;
}
.dropdown_menu {
    display: none;
    background-color: #7a7777;
} 
.dropdown_menu li a {
    font-size: .8em;
    padding-left: 40px;
}
.dropdown_menu.open li.active {
    display: block;
}
.dropdown_menu_bell {
    display: none;
    position: absolute;
    min-width: 300px;
    top: 40px;
    right: 50px;
    z-index: 200;
    background-color: #fff;
    border: 1px solid #444;
}
.dropdown_menu_bell .list {
    color: #444;
    font-size: .8em;
}
.date {
    font-size: .8em;
    color: #7a7777;
}
.main_content {
    width: calc(100% - 210px);
    height: 100vh;
}
.main_content .header {
    background-color: #F5F5F5;
}
.main_content .header i {
    color: #444;
}
.fa-bell {
    font-size: 1.2em;
}
.fa-sign-out {
    font-size: 1.5em;
}
.main_content .header img {
    width: 1.5em;
}

.rotate180 {
    transform: rotate(180deg);
}
table img {
    width: 3em;
}
tbody tr th, tbody tr td {
    font-size: .85em;
    font-weight: normal;
    vertical-align: middle;
}
.model {
    display: none;
    position: fixed;
    width: 100%;
    height: 100vh;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    z-index: 25;
    background-color: rgba(0, 0, 0, .8);
}
.deletebox, .edit_add_box, .records_box {
    position: absolute;
    width: 500px;
    height: auto;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}
.chatbox {
    height: 100%;
    z-index: 50;
}
.chatbox .chatbox_header .user {
    position: relative;
}
.chatbox .chatbox_header .avatar {
    width: 2.5em;
}
.chatbox .chatbox_header .circle {
    position: absolute;
    background: #3cb140;
    width: .8em;
    height: .8em;
    right: 0;
    bottom: 0;
    top: 30px;
    border: 2px solid #fff;
}
.chatbox .chatbox_header .online, .chatlist .read {
    font-size: .8em;
}
.chatbox .chatbox_dialog {
    height: 450px;
    overflow-y: scroll;
}
.chatlist_list {
    height: 500px;
    overflow-y: scroll;
}
.chatbox .chatbox_dialog .left .dialog_text {
    background-color: #F5F5F5;
}
.chatbox .chatbox_dialog .right .dialog_text {
    background-color: #2955dc;
}
.chatbox .chatbox_dialog .time {
    font-size: .8em;
    color: #444;
}
.chatbox .chatbox_footer .chatbox_send {
    margin-left: 10px;
    width: 1.5em;
    cursor: pointer;
}
.chatlist .avatar {
    width: 4em;
} 
.login {
    display: block;
    align-items: center;
    background: url(../images/bg.png) no-repeat;
    background-color: #f4f4f4;
    background-size: cover;
}
.form {
    background-color: #fff;
}
.open {
    display: block;
}
.close {
    display: none;
}
@media only screen and (max-width: 768px) {
    button {
        width: 100%;
    }
    .aside_menu {
        display: none;
        position: fixed;
        height: auto;
        width: 100%;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        z-index: 20;
        overflow: hidden;
    }
    .logo {
        position: relative;
    }
    .aside_close {
        position: absolute;
        display: block;
        top: 16px;
        right: 12px;
        z-index: 100;
    }
    .main_content {
        width: 100%;
    }
    .dropdown_menu_bell {
        position: absolute;
        right: 0;
        left: 0;
    }
    .fa-angle-left {
        margin-right: 8px;
    }
    .chatlist {
        display: none;
    }
    .deletebox, .edit_add_box, .subscribe_records_box {
        width: 100%;
        height: auto;
    }
    .chatbox {
        width: 100%;
        height: 100vh;
        overflow: hidden;
    }
    .chatbox .chatbox_dialog {
        height: 550px;
        overflow-y: scroll;
    }
    .chatbox .chatbox_footer {
        width: auto;
    }
    .open {
        display: block;
    }
    .close {
        display: none;
    }
}