body{margin:0;padding:0;min-height:100vh;display:flex;font-family:Arial, sans-serif}nav{width:250px;background:#f8f9fa;padding:15px;height:100vh;position:fixed;overflow-y:auto;border-right:1px solid #ddd;top:0;left:0}nav ul{list-style:none;margin:0;padding:0}.nav-item{margin:6px 0}.nav-row{display:flex;align-items:center;justify-content:space-between;gap:8px}.nav-link,.nav-label{display:block;flex:1;padding:6px 8px;text-decoration:none;color:#007bff;font-weight:600;border-radius:5px}.nav-link:hover{background-color:#e9ecef}.nav-label{color:#222}.nav-toggle{background:none;border:none;color:#007bff;font-weight:600;font-size:18px;cursor:pointer;padding:4px 8px;border-radius:5px;width:auto;flex:0 0 auto}.nav-toggle:hover{background-color:#e9ecef}.toggle-icon{display:inline-block;line-height:1}.nav-children{padding-left:14px;margin-top:4px;border-left:1px solid #ddd}.nav-children[hidden]{display:none}.nav-children .nav-link,.nav-children .nav-label{font-weight:400;color:#222}main{margin-left:270px;padding:20px;flex-grow:1}