:root{--bg:#eef2f7;--surface:#fff;--border:#d9e1ec;--text:#334155;--text-strong:#0f172a;--muted:#64748b;--shadow:0 18px 45px #0f172a14;color:var(--text);background:var(--bg);font-synthesis:none;text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}*{box-sizing:border-box}body{min-width:320px;min-height:100svh;margin:0}button,a,label{-webkit-tap-highlight-color:transparent}button:focus-visible,a:focus-visible,label:focus-within{outline-offset:2px;outline:3px solid #2563eb4d}.app-shell{min-height:100svh;padding:24px}.site-header{justify-content:space-between;align-items:center;gap:20px;max-width:1440px;margin:0 auto;padding:16px 24px 0;display:flex}.site-logo{color:var(--text-strong);align-items:center;gap:10px;text-decoration:none;display:inline-flex}.site-logo span{color:#fff;background:#2563eb;border-radius:8px;place-items:center;width:38px;height:38px;font-size:13px;font-weight:800;display:inline-grid}.site-nav{flex-wrap:wrap;justify-content:flex-end;gap:8px;display:flex}.site-nav a,.site-footer nav a{color:var(--muted);font-size:14px;font-weight:700;text-decoration:none}.site-nav a{border-radius:8px;padding:8px 10px}.site-nav a:hover,.site-nav a.is-active,.site-footer nav a:hover{color:#2563eb;background:#eff6ff}.site-header+.language-toggle{max-width:max-content;margin:18px auto 0}.workspace{grid-template-columns:minmax(280px,360px) minmax(0,1fr);gap:24px;max-width:1440px;min-height:calc(100svh - 48px);margin:0 auto;display:grid}.control-panel{border:1px solid var(--border);background:var(--surface);box-shadow:var(--shadow);border-radius:8px;flex-direction:column;gap:20px;padding:24px;display:flex}.brand-row{align-items:flex-start;gap:14px;display:flex}.language-toggle{border:1px solid 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