:root{--purple:#6848ff;--purple2:#5a36f0;--ink:#171426;--muted:#716d82;--line:#e6e2ef;--soft:#f7f6fb;--panel:#fff}*{box-sizing:border-box}html,body{margin:0;height:100%;font-family:Inter,ui-sans-serif,system-ui,-apple-system,Segoe UI,sans-serif;color:var(--ink);background:#f4f3f8}button,input,select{font:inherit}.topbar{height:58px;display:flex;align-items:center;gap:28px;padding:0 20px;background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:50}.brand{display:flex;align-items:center;gap:9px;text-decoration:none;color:var(--ink);font-size:20px}.brand span{display:grid;place-items:center;width:28px;height:28px;border-radius:9px;background:linear-gradient(145deg,var(--purple),#8a73ff);color:#fff;font-weight:900}.topbar nav{display:flex;gap:24px;align-items:center;flex:1}.topbar nav a{font-size:13px;color:#2f2a3e;text-decoration:none}.topbar nav a.active{color:var(--purple);font-weight:800;border-bottom:2px solid var(--purple);padding:20px 0}.top-actions{display:flex;gap:10px;align-items:center}.top-actions select,.top-actions button,.login{border:1px solid var(--line);background:#fff;border-radius:9px;padding:8px 11px;text-decoration:none;color:var(--ink)}.login{background:var(--purple);color:#fff;border-color:var(--purple);font-weight:800}.app-shell{height:calc(100vh - 122px);display:grid;grid-template-columns:185px 390px 105px minmax(520px,1fr) 205px;overflow:hidden}.tools-nav,.signature-panel,.pages-panel,.properties-panel{background:#fff;border-right:1px solid var(--line);min-height:0;overflow:auto}.tools-nav{padding:14px 10px}.tools-nav .back{display:block;margin:0 6px 14px;font-size:12px;color:#4c465d;text-decoration:none}.tools-nav h3,.pages-panel h3,.properties-panel h3{font-size:9px;letter-spacing:.08em;margin:8px 10px 12px}.tools-nav>a:not(.back){display:block;text-decoration:none;color:#332e42;padding:9px 12px;border-radius:8px;font-size:12px;margin:2px 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