:root{--sidebar-width: 240px;--list-width: 320px;--primary-color: #1976d2;--border-color: #e0e0e0;--bg-color: #ffffff;--text-color: #333333;--text-secondary: #666666;--hover-color: #f5f5f5;--selected-color: #e3f2fd}body{margin:0;padding:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;color:var(--text-color);background-color:var(--bg-color);overflow:hidden}*{box-sizing:border-box}ul{list-style:none;margin:0;padding:0}a{text-decoration:none;color:inherit}button{cursor:pointer;border:none;background:none;font-family:inherit}.pane{height:100vh;overflow-y:auto;border-right:1px solid var(--border-color)}.pane-content{padding:1rem}