:root{--SIDE_WIDTH:250px;--SIDE_H1_HEIGHT:50px}.SIDE{width:var(--SIDE_WIDTH);background-color:#f0f8ff;height:100vh;position:fixed;top:0;left:0;overflow:hidden}.SIDE>h1{text-align:center;height:var(--SIDE_H1_HEIGHT)}.SIDE>.TOOL_LIST{height:calc(100vh - var(--SIDE_H1_HEIGHT));padding:10px;overflow:hidden scroll}.SIDE>.TOOL_LIST>a{color:#000;text-decoration:none}.SIDE>.TOOL_LIST>a>button{width:100%}.CONTENTS{top:0;left:var(--SIDE_WIDTH);width:calc(100vw - var(--SIDE_WIDTH));height:100vh;padding:10px;position:fixed;overflow:hidden scroll}.CONTENTS>.PARENT>*{margin:5px}