*,:before,:after{box-sizing:border-box;margin:0;padding:0}:root{--bg:#f8f9fa;--surface:#fff;--surface2:#f1f3f5;--border:#dee2e6;--text:#212529;--text2:#6c757d;--text3:#adb5bd;--accent:#228be6;--accent-hover:#1c7ed6;--danger:#fa5252;--danger-hover:#e03131;--success:#40c057;--warning:#fab005;--radius:8px;--radius-sm:4px;--shadow:0 1px 3px #00000014, 0 1px 2px #0000000f;--shadow-md:0 4px 12px #0000001a;color:var(--text);background:var(--bg);-webkit-font-smoothing:antialiased;font-family:system-ui,-apple-system,Segoe UI,sans-serif;font-size:14px;line-height:1.5}@media (prefers-color-scheme:dark){:root{--bg:#0f1117;--surface:#1a1d24;--surface2:#22262f;--border:#2e3340;--text:#e9ecef;--text2:#868e96;--text3:#495057;--accent:#4dabf7;--accent-hover:#74c0fc;--danger:#ff6b6b;--danger-hover:#fa5252;--success:#69db7c;--warning:#ffd43b;--shadow:0 1px 3px #0000004d, 0 1px 2px #0003;--shadow-md:0 4px 12px #0006}}body{min-height:100vh}#root{flex-direction:column;min-height:100vh;display:flex}.layout{min-height:100vh;display:flex}.sidebar{background:var(--surface);border-right:1px solid var(--border);flex-direction:column;flex-shrink:0;width:220px;height:100vh;padding:20px 0;display:flex;position:sticky;top:0}.sidebar-brand{border-bottom:1px solid var(--border);margin-bottom:12px;padding:0 20px 20px}.sidebar-brand h1{color:var(--text);font-size:15px;font-weight:700}.sidebar-brand p{color:var(--text2);margin-top:2px;font-size:11px}.nav-item{cursor:pointer;color:var(--text2);-webkit-user-select:none;user-select:none;border-left:3px solid #0000;align-items:center;gap:10px;padding:9px 20px;font-size:13px;font-weight:500;transition:all .15s;display:flex}.nav-item:hover{background:var(--surface2);color:var(--text)}.nav-item.active{color:var(--accent);border-left-color:var(--accent);background:var(--surface2)}.nav-item svg{opacity:.7;flex-shrink:0;width:16px;height:16px}.nav-item.active svg{opacity:1}.sidebar-spacer{flex:1}.sidebar-footer{border-top:1px solid var(--border);padding:16px 20px 0}.logout-btn{border:1px solid var(--border);border-radius:var(--radius-sm);width:100%;color:var(--text2);cursor:pointer;text-align:left;background:0 0;padding:8px 12px;font-size:12px}.logout-btn:hover{background:var(--danger);color:#fff;border-color:var(--danger)}.main{flex:1;overflow-y:auto}.page{max-width:1100px;padding:28px 32px}.page-header{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;margin-bottom:24px;display:flex}.page-title{font-size:20px;font-weight:700}.page-sub{color:var(--text2);margin-top:2px;font-size:13px}.login-wrap{background:var(--bg);justify-content:center;align-items:center;min-height:100vh;display:flex}.login-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);width:360px;box-shadow:var(--shadow-md);padding:40px 36px}.login-card h2{margin-bottom:4px;font-size:18px;font-weight:700}.login-card 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