body{margin:0;font:16px sans-serif}.container{position:relative;display:flex;flex-direction:column;max-width:600px;min-height:400px;margin:20px auto auto;padding:20px;border:3px dashed #aaa;border-radius:10px}.container_drag{border-color:#444}.label{position:absolute;display:flex;align-items:center;justify-content:center;left:0;top:0;width:100%;height:100%;font-size:120%}.buttons{display:flex;margin-top:auto}.save{display:none;flex:1 1 auto;margin-top:10px;padding:10px;background:#5ec25e;color:#fff;font-size:120%;border:none;border-radius:3px;cursor:pointer}.save:first-child{margin-right:10px}.save:hover{background:#62cf62}.container_with-data .label{display:none}.container_with-data .save{display:block}