:root{--bg: #f5f6f8;--surface: #ffffff;--surface-alt: #f1f3f7;--text: #111827;--muted: #6b7280;--border: #d6dbe3;--accent: #2d6cdf;--accent-soft: #e7efff;--toast-bg: #edf4ff;--toast-text: #0b1730;--toast-border: #9cbcff;--error: #b42318;--error-bg: #fee4e2;--shadow: 0 10px 28px rgba(15, 23, 42, .08)}:root[data-theme=dark]{--bg: #101317;--surface: #171b20;--surface-alt: #1f2630;--text: #eef2ff;--muted: #9ca8ba;--border: #2b3440;--accent: #72a0ff;--accent-soft: #1f2e4f;--toast-bg: #1a2b46;--toast-text: #e8f1ff;--toast-border: #4f79c7;--error: #fda29b;--error-bg: rgba(180, 35, 24, .25);--shadow: 0 8px 24px rgba(0, 0, 0, .28)}*{box-sizing:border-box}html,body,#app{margin:0;min-height:100%}body{font-family:Space Grotesk,Avenir Next,Segoe UI,sans-serif;background:var(--bg);color:var(--text)}button,input,code{font:inherit}.app-shell{min-height:100dvh;display:flex;flex-direction:column}.topbar{display:flex;align-items:center;justify-content:space-between;gap:18px;padding:16px 20px;border-bottom:1px solid var(--border);background:var(--surface)}.brand{display:flex;align-items:center;gap:10px;min-width:0}.brand-icon{display:inline-grid;place-items:center;width:30px;height:30px;border-radius:9px;border:1px solid var(--border);color:var(--accent);background:var(--surface-alt);font-weight:700}.brand-copy h1{margin:0;font-size:16px;line-height:1.2}.brand-copy p{margin:2px 0 0;font-size:12px;color:var(--muted)}.toolbar{display:flex;align-items:center;gap:8px;margin-left:auto}.action-btn,.icon-btn,.mobile-tab,.link-btn{border-radius:10px;border:1px solid var(--border);background:var(--surface);color:var(--text)}.action-btn{padding:8px 12px;font-size:13px;cursor:pointer}.action-btn:hover,.mobile-tab:hover,.link-btn:hover{border-color:var(--accent)}.parse-mode-btn.is-strict{border-color:var(--accent);background:var(--accent-soft);color:var(--accent)}.icon-btn{width:36px;height:36px;display:inline-grid;place-items:center;cursor:pointer;font-size:17px}.workspace{flex:1;display:flex;flex-direction:column;padding:14px 16px 10px;gap:10px}.mobile-tabs{display:none}.panes{flex:1;min-height:0;display:grid;grid-template-columns:minmax(280px,var(--left-pane-width)) 8px minmax(260px,1fr);gap:0}.pane{min-height:0;border:1px solid var(--border);background:var(--surface);box-shadow:var(--shadow)}.editor-pane{border-right:none;border-radius:12px 0 0 12px;display:flex;flex-direction:column}.tree-pane{border-left:none;border-radius:0 12px 12px 0;display:flex;flex-direction:column}.error-banner{margin:10px 10px 0;padding:9px 11px;border-radius:8px;font-size:13px;background:var(--error-bg);color:var(--error);border:1px solid color-mix(in srgb,var(--error) 28%,transparent)}.editor-host{flex:1;min-height:0}.editor-host .cm-editor{height:100%}.source-actions{display:flex;flex-wrap:wrap;gap:8px;padding:10px;border-top:1px solid var(--border);background:var(--surface);border-radius:0 0 0 12px}.splitter{background:var(--surface-alt);border-top:1px solid var(--border);border-bottom:1px solid var(--border);cursor:col-resize}.path-bar{display:flex;gap:10px;align-items:center;padding:10px 12px;border-bottom:1px solid var(--border);font-size:12px;color:var(--muted)}.path-bar code{color:var(--accent);font-family:IBM Plex Mono,SFMono-Regular,Menlo,monospace;font-size:12px}.tree-host{flex:1;min-height:0;overflow:auto;padding:8px 0}.tree-root,.tree-children{display:block}.tree-row{display:grid;grid-template-columns:16px minmax(90px,auto) 1fr;align-items:center;width:100%;text-align:left;padding-top:4px;padding-bottom:4px;border:0;border-radius:0;background:transparent;color:var(--text);cursor:pointer}.tree-row:hover{background:var(--surface-alt)}.tree-row.is-selected{background:var(--accent-soft)}.tree-toggle{color:var(--muted);-webkit-user-select:none;user-select:none}.tree-toggle-spacer{opacity:.5}.tree-key{font-family:IBM Plex Mono,SFMono-Regular,Menlo,monospace;font-size:13px}.tree-value{color:var(--muted);font-family:IBM Plex Mono,SFMono-Regular,Menlo,monospace;font-size:12px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;padding-right:10px}.tree-empty{padding:16px;color:var(--muted);font-size:13px}.workspace.is-dragging .pane{border-color:var(--accent)}.workspace.is-resizing,.workspace.is-resizing *{cursor:col-resize;-webkit-user-select:none;user-select:none}.site-footer{display:flex;justify-content:space-between;align-items:center;gap:8px;padding:10px 20px 16px;font-size:12px;color:var(--muted)}.credit-link{color:var(--accent);text-decoration:none}.credit-link:hover{text-decoration:underline}.link-btn{cursor:pointer;font-size:12px;padding:6px 10px}.privacy-modal{border:1px solid var(--border);border-radius:12px;padding:0;width:min(440px,calc(100vw - 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