:root{font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;color:#172033;background:#f5f7fb;font-synthesis:none;text-rendering:geometricPrecision;-webkit-font-smoothing:antialiased;--panel: #ffffff;--panel-soft: #f8fafc;--line: #dfe5ee;--line-strong: #c8d1df;--text: #172033;--muted: #64748b;--blue: #2364e8;--blue-soft: #eaf1ff;--danger: #b42318;--danger-soft: #fff1f0;--radius: 16px;--radius-sm: 12px;--shadow: 0 12px 32px rgba(15, 23, 42, .07)}*{box-sizing:border-box}body{margin:0;min-width:320px;min-height:100vh;overflow:hidden}button,input,select,textarea{font:inherit}button{border:0}#app{min-height:100vh}.app-shell{height:100vh;display:grid;grid-template-rows:auto 1fr;gap:12px;padding:12px}.topbar{min-height:64px;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:10px 12px;border:1px solid var(--line);border-radius:var(--radius);background:#fffffff0;box-shadow:var(--shadow)}.brand-group{min-width:0;display:flex;align-items:center;gap:16px}.brand-mark{width:34px;height:34px;display:grid;place-items:center;border-radius:10px;color:#fff;background:#1f2937;font-size:15px;font-weight:760}.brand-title{display:grid;gap:2px}.brand-title strong{font-size:15px;line-height:18px}.brand-title span{color:var(--muted);font-size:12px;line-height:16px}.mode-tabs,.sub-tabs,.tool-tabs{display:flex;align-items:center;gap:4px;padding:4px;border:1px solid #dbe3ef;border-radius:999px;background:#f7f9fc}.tab,.tool-tab{height:32px;padding:0 14px;border-radius:999px;color:#526176;background:transparent;font-size:13px;font-weight:620;cursor:pointer}.tab.is-active,.tool-tab.is-active{color:#fff;background:var(--blue);box-shadow:0 5px 14px 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