:root{--bg:#ffffff;--fg:#111318;--muted:#5f6470;--border:#e3e5ea;--accent:#1f5fbf;--accent-soft:#eaf1fb;--panel:#f7f8fa}@media (prefers-color-scheme:dark){:root{--bg:#0f1116;--fg:#e8eaf0;--muted:#9aa0ad;--border:#262a33;--accent:#6ea3f2;--accent-soft:#172236;--panel:#161a22}}*{box-sizing:border-box}body,html{margin:0;height:100%;background:var(--bg);color:var(--fg);font:14px/1.45 system-ui,-apple-system,Segoe UI,sans-serif}button{font:inherit;color:inherit;background:var(--panel);border:1px solid var(--border);border-radius:6px;padding:6px 12px;cursor:pointer}button.primary{background:var(--accent);border-color:var(--accent);color:#fff}.shell{display:grid;grid-template-columns:340px 1fr;height:100vh}.sidebar{border-right:1px solid var(--border);padding:16px;overflow:auto;background:var(--panel)}.main{display:flex;flex-direction:column;padding:16px}.topbar{display:flex;justify-content:space-between;align-items:center;margin-bottom:12px}.muted{color:var(--muted)}.tree ul{list-style:none;margin:0;padding-left:16px}.tree li{margin:2px 0}.node{display:flex;align-items:center;gap:6px;padding:3px 6px;border-radius:4px}.node:hover{background:var(--accent-soft)}.node .toggle{width:16px;display:inline-block;text-align:center;color:var(--muted)}.node button.folder{display:flex;align-items:center;gap:6px;flex:1 1;min-width:0;border:0;background:transparent;padding:0;text-align:left}.node button.folder .name{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.site-url{display:flex;flex-wrap:wrap;gap:6px;align-items:center;margin-bottom:8px}.site-url input{flex:1 1;min-width:10rem;font:inherit;color:inherit;background:var(--bg);border:1px solid var(--border);border-radius:6px;padding:4px 8px}.node label{flex:1 1;cursor:pointer;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.chat{flex:1 1;border:1px solid var(--border);border-radius:8px;padding:16px;display:flex;flex-direction:column}.chat .messages{flex:1 1;overflow:auto}.chat .composer{display:flex;gap:8px;margin-top:12px}.chat textarea{flex:1 1;resize:none;border:1px solid var(--border);border-radius:6px;padding:8px;background:var(--bg);color:var(--fg);font:inherit}.chips{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:8px}.chip{display:inline-flex;align-items:center;gap:4px;background:var(--accent-soft);border:1px solid var(--border);border-radius:999px;padding:2px 10px;font-size:12px}.chip button{border:0;background:transparent;padding:0 2px;line-height:1}.error button{margin-left:6px}.center{display:grid;place-items:center;height:100vh;text-align:center}.onboarding{max-width:36rem;text-align:left}.onboarding ul{padding-left:1.2rem}.error{color:#c0392b;font-size:12px}@media (max-width:768px){.shell{grid-template-columns:1fr;grid-template-rows:40vh 1fr}.sidebar{border-right:0;border-bottom:1px solid var(--border)}}