:root{--app-bg:#f6f7f9;--surface:#ffffff;--surface-2:#eef3f2;--surface-3:#f1f5f9;--text:#172026;--muted:#65727d;--faint:#8a98a4;--border:#dbe2e8;--border-strong:#c7d1d9;--brand:#0f766e;--brand-dark:#115e59;--brand-soft:#d9f0ed;--accent:#2563eb;--accent-soft:#dbeafe;--success:#15803d;--success-soft:#dcfce7;--warning:#b45309;--warning-soft:#ffedd5;--danger:#dc2626;--danger-soft:#fee2e2;--shadow:0 10px 28px rgba(23,32,38,0.08);--radius:8px;letter-spacing:0}*,:after,:before{box-sizing:border-box}body,html{min-height:100%;margin:0}body{background:var(--app-bg);color:var(--text);font-family:Arial,Helvetica,sans-serif;font-size:14px;line-height:1.5;letter-spacing:0}button,input,select,textarea{font:inherit}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.55}.app-shell{min-height:100vh;display:grid;grid-template-columns:236px minmax(0,1fr)}.side-nav{background:#182126;color:#f8fafc;padding:18px 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rgba(255,255,255,.08);padding-top:14px}.main{min-width:0;display:flex;flex-direction:column}.topbar{min-height:64px;background:var(--surface);border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;gap:18px;padding:0 24px;position:-webkit-sticky;position:sticky;top:0;z-index:5}.topbar h1{margin:0;font-size:20px;line-height:1.2}.topbar-meta{color:var(--muted);font-size:12px}.button-row,.toolbar-actions,.topbar-actions{display:flex;align-items:center;gap:8px;flex-wrap:wrap}.content{padding:22px;display:grid;grid-gap:16px;gap:16px}.metrics{display:grid;grid-template-columns:repeat(4,minmax(160px,1fr));grid-gap:12px;gap:12px}.metric{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:14px;min-height:88px;display:grid;align-content:space-between}.metric-label{color:var(--muted);font-size:12px}.metric-value{font-size:24px;font-weight:700}.workspace-grid{display:grid;grid-template-columns:minmax(340px,420px) 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