*{
    margin: 0;
    padding: 0;
}

ul,li{
    list-style-type: none;
}

a{
    text-decoration: none;
    color: #000;
}

html,body{
    width: 100%;
    height: 100%;
}

body{
    background-color: #fff;
    font-family: helvetica, Arial,sans-serif;
    font-size: 62.5%;
}

 #header{
    height: 60px;
    min-width: 600px;
    width: 100%;
    background: #ddd;
    border: 2px solid #ccc;
    border-bottom-width: 1px;
    position: absolute;
    left: 0;
    top: 0;
    box-sizing:border-box;
    -webkit-box-sizing:border-box;
    -moz-box-sizing:border-box;
    -ms-box-sizing:border-box;
    -o-box-sizing:border-box;
} 

.logo{
    font-size: 3.6em;
    color: #999;
    line-height: 56px;
    font-weight: bolder;
    margin-left: 20px;
}

#container{
    /* font-size: 1.8em; */
    min-width: 600px;
    min-height: 200px;
    width: 100%;
    height: 100%;  
    overflow: hidden;
    padding-top: 60px;
    padding-bottom: 50px; 
    box-sizing:border-box;
    -webkit-box-sizing:border-box;
    -moz-box-sizing:border-box;
    -ms-box-sizing:border-box;
    -o-box-sizing:border-box;
}

#left,
#middle{
    background-color: #f2f2f2;
    width: 250px;
    height: 100%;
    border: 1px solid #ccc;
    border-top-width: 0px;
    border-bottom-width:0px;
    overflow: hidden;
    position: relative;
    float: left;
}  

.all_task,
.classify{
    display: block;
    font-size: 1.8em;
    line-height: 1;
}

.all_task,
.classify{
    margin: 20px 0px 0px 10px; 
}

ul.list{
    margin-top: 10px;
}

ul.list li ul li{
    padding-left: 25px;
}

 span.icon-folder-open{
    height: 20px;
    font-size: 1.8em;
    line-height: 20px;
    padding:6px 0px  6px 25px;
    cursor: pointer;
    display: block;
}

a.icon-file-empty{
    height: 20px;
    font-size: 1.6em;
    line-height: 20px;
    padding: 5px 0px 5px 50px;
    margin-left: -25px;
    display: block;
}

span.icon-folder-open:hover,
a.icon-file-empty:hover{
    color: green;
    background-color: #fff;
}

span.icon-folder-open span:first-child,
a.icon-file-empty span{
    margin-left: 10px;
    font-family:helvetica, Arial,sans-serif;
    font-size: 1em;
    line-height: 1;
    display: inline-block;
}

span.icon-cross{
    font-size: 14px;
    line-height: 20px;
    color: green;
    display: none;
    float: right;
    margin-right: 10px;
}

span.icon-folder-open:hover span.icon-cross{
    display: inline-block;
}

.add{
    width: 100%;
    height: 50px;
    border-top: 1px solid #ccc;
    background: #eee;
    position: absolute;
    bottom: 0px;
    cursor: pointer;
}

.add:hover,
.add:hover span{
    background-color: #fff;
    color: green;
}


.add span{
    display: inline-block;
    padding-left: 25px;
    font-size: 1.8em;
    line-height: 50px;
}

.add span + span{
    position: absolute;
    left: 50%;
    margin-left: -46px;
    padding: 0px;
}

#middle{
    border-left: 0px;   
    background-color: #fff;

}

#tasks_btns{
    width: 100%;
    height: 50px;
    border-bottom: 1px solid #ccc;
    background-color: #eee;
    overflow: hidden;
    
}

span.btn_filter{
    display: inline-block;
    padding: 5px 2px;
    margin-top: 10px;
    width: 60px;
    text-align: center;
    float: left;
    margin-left: 10px;
    font-size: 1.6em;
    line-height: 20px;
    cursor: pointer;
}

.btn_active{
    background-color: #fff;
    border: 1px solid #ccc;
}

#tasks{
    font-size: 1.4em;
    line-height: 30px;
}

#tasks ul.content{
    display: none;
}

#tasks ul.tasks_active{
    display: block;
}

#tasks span.time{
    display: block;
    padding-left: 20px;
    background-color: #fafaee;
}

#tasks ul.content ul{
    margin-left: 40px;
}

#tasks li.no_finish a{
    color: green;
}



#footer{
    width: 100%;
    min-width: 600px;
    height: 50px;
    margin-top: -50px;
    background-color: #eee;
    border: 1px solid #ccc;
    overflow: hidden;
    box-sizing:border-box;
    -webkit-box-sizing:border-box;
    -moz-box-sizing:border-box;
    -ms-box-sizing:border-box;
    -o-box-sizing:border-box;
}


#footer span{
    font-size: 1.4em;
    line-height: 48px;
    display: inline-block;
    position: absolute;
    left: 50%;
    margin-left: -105px;
}