*,:before,:after{box-sizing:border-box;margin:0;padding:0}body{color:#1a1f2e;background:#f4f6fb;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}.app-shell{height:100vh;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;display:flex;overflow:hidden}.sidebar{color:#c8cdd8;background:#1a1f2e;flex-direction:column;width:220px;min-width:220px;display:flex;overflow-y:auto}.sidebar-brand{border-bottom:1px solid #2d3348;padding:20px 16px}.brand-text{color:#fff;letter-spacing:.3px;font-size:15px;font-weight:700}.sidebar-nav{flex:1;margin:0;padding:8px 0;list-style:none}.nav-link{color:#9ba4b5;border-left:3px solid #0000;align-items:center;gap:10px;padding:10px 16px;font-size:14px;text-decoration:none;transition:background .15s,color .15s;display:flex}.nav-link:hover{color:#e2e6f0;background:#252b3b}.nav-link.active{color:#4f8ef7;background:#252b3b;border-left-color:#4f8ef7}.nav-icon{text-align:center;width:20px;font-size:16px}.sidebar-footer{color:#5a6172;border-top:1px solid #2d3348;padding:12px 16px;font-size:12px}.content{background:#f4f6fb;flex:1;padding:28px 32px;overflow-y:auto}