header {
    height: 60px;
    line-height: 60px;
    box-sizing: border-box;
    position: fixed;
}

header span {
    margin-right: 40px;
    color: black;
    font-size: 20px;
}

aside {
    width:17%;
    top: 60px;
    padding-right: 10px;
    position: fixed;
    overflow-y:scroll;
    height: 90%
}
aside div.toc {
    margin-top: 10px;
}

article {
    margin-top: 60px;
    width:80%;
    float:right;
    padding-left: 10px;
}

article .top {
    padding-left: 20px;
    width:200px;
}

article .content {
    padding-left: 20px;
    width:96%;
}

.content .is_file_exists {
    position: relative;
    left: 30%;
    margin-top: 18%;
    width: 300px;
    height: 40px;
    line-height: 40px;
    font-size: 22px;
}

.modal-edit {
    width: 800px;
}

.modal-login {
    width: 400px;
}