:root{--bg:#0f1117;--bg-elev:#181b23;--bg-elev-2:#212531;--border:#2a2f3d;--text:#e6e9ef;--text-dim:#9aa3b2;--accent:#4f8cff;--danger:#ff6b6b;--warn:#f0b429;--ok:#4ade80;--muted:#6b7280}*{box-sizing:border-box}html,body{background:var(--bg);height:100%;color:var(--text);margin:0;padding:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Hiragino Sans,Noto Sans JP,sans-serif;font-size:13px}.topbar{background:var(--bg-elev);border-bottom:1px solid var(--border);align-items:center;gap:12px;padding:6px 20px;font-size:12px;display:flex}.topbar-user{color:var(--text-dim);margin-left:auto}.topbar-logout{color:var(--text);border:1px solid var(--border);background:var(--bg-elev-2);border-radius:4px;padding:3px 10px;text-decoration:none}.topbar-logout:hover{background:var(--border)}.btn-sync{color:var(--text);background:var(--bg-elev-2);border:1px solid var(--border);cursor:pointer;vertical-align:middle;border-radius:4px;margin-left:8px;padding:2px 10px;font-size:12px}.btn-sync:hover:not(:disabled){background:var(--border)}.btn-sync:disabled{opacity:.5;cursor:progress}.btn-sync-error{color:var(--danger);text-overflow:ellipsis;white-space:nowrap;max-width:320px;margin-left:8px;font-size:11px;overflow:hidden}.app-shell{align-items:stretch;min-height:calc(100vh - 33px);display:flex}.sidebar{background:var(--bg-elev);border-right:1px solid var(--border);flex-shrink:0;width:200px;padding:12px 0}.sidebar-menu{margin:0;padding:0;list-style:none}.sidebar-item{color:var(--text);border-left:3px solid #0000;padding:8px 20px;font-size:13px;text-decoration:none;display:block}.sidebar-item:hover{background:var(--bg-elev-2)}.sidebar-item-active{background:var(--bg-elev-2);border-left-color:var(--accent);color:var(--text);font-weight:600}.app-content{flex:1;min-width:0}.app{max-width:1600px;margin:0 auto;padding:16px 20px 40px}.app-header{margin-bottom:12px}.app-header h1{margin:0 0 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