.layout{display:flex;min-height:100vh}.sidebar{width:220px;background:#111827;color:#fff;padding:16px;box-sizing:border-box}.sidebar .brand{font-weight:700;font-size:18px;margin-bottom:12px}.sidebar nav{margin-top:12px}.sidebar a{color:#fff;text-decoration:none;display:block;padding:8px 10px;border-radius:6px;margin-bottom:6px}.sidebar a:hover{background:#ffffff0a}.sidebar a.active{background:#1f2937;font-weight:600}.content{flex:1;background:#f3f4f6;padding:20px;box-sizing:border-box}