:root{--bg:#f6f8fc;--panel:#fff;--text:#1a2942;--muted:#728098;--border:#e4eaf3;--blue:#3484eb;--blue-soft:#eaf3ff;--shadow:0 18px 55px rgba(40,71,119,.08)}*{box-sizing:border-box}body{margin:0;color:var(--text);background:var(--bg);font:14px/1.5 Inter,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}button,input,select{font:inherit}button{cursor:pointer}button:disabled{opacity:.4;cursor:not-allowed}a:focus-visible,button:focus-visible,canvas:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid #80baff;outline-offset:3px}a{color:inherit;text-decoration:none}.shell{height:100dvh;min-height:540px;display:flex;flex-direction:column;overflow:hidden}.topbar{height:70px;flex:none;display:flex;align-items:center;gap:16px;padding:0 24px;border-bottom:1px solid 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