.fileTree-box{display:flex;align-items:flex-start}.fileTree{width:260px;margin-right:20px;border-right:3px solid #ddd;min-height:66vh;padding-right:10px}.btn-box{text-align:right;position:fixed;right:56px;top:126px}.file-content{flex:1;height:66vh;overflow-y:scroll}