body{
    margin: 0px;
}

.login_block{
    width:300px;
    height:200px;
    border-radius:4px;
    background-color: #ecf0f1;
    margin:100px auto;
    top:10%;
    position: relative;
}
.manager_menu{
    width:20%;
    float:left;
}
.menu_list{
    width:80%;
    margin:50px auto;
    
}
.manager_content{
     width:79%;
     float:left;
}

.data_view{
    margin:50px auto;
}