:root{--bg: #ffffff;--bg-alt: #f6f7f9;--border: #e3e6ea;--text: #1f2328;--muted: #6b7280;--primary: #1a73e8;--primary-hover: #1666cc;--danger: #c0392b;--radius: 8px}@media(prefers-color-scheme:dark){:root{--bg: #16181d;--bg-alt: #1d2027;--border: #2c313a;--text: #e6e8eb;--muted: #9aa3af;--primary: #5b9dff;--primary-hover: #7db0ff}}*{box-sizing:border-box}html,body,#root{height:100%;margin:0}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;background:var(--bg);color:var(--text);font-size:14px}.muted{color:var(--muted)}.small{font-size:12px}.error{color:var(--danger);background:color-mix(in srgb,var(--danger) 12%,transparent);padding:8px 12px;border-radius:var(--radius)}.center,.signin{height:100%;display:grid;place-items:center}.btn{display:inline-flex;align-items:center;gap:6px;border:1px solid var(--border);background:var(--bg);color:var(--text);padding:8px 14px;border-radius:var(--radius);cursor:pointer;text-decoration:none;font-size:14px}.btn:hover{background:var(--bg-alt)}.btn-primary{background:var(--primary);border-color:var(--primary);color:#fff}.btn-primary:hover{background:var(--primary-hover)}.btn-ghost{border-color:transparent;background:transparent}.signin-card{text-align:center;border:1px solid var(--border);border-radius:12px;padding:40px 36px;max-width:360px;display:flex;flex-direction:column;gap:14px;background:var(--bg)}.signin-card h1{margin:0;font-size:22px}.app{display:flex;flex-direction:column;height:100%}.topbar{display:flex;align-items:center;gap:12px;padding:10px 16px;border-bottom:1px solid var(--border)}.brand{font-weight:600}.spacer{flex:1}.user{display:flex;align-items:center;gap:8px;color:var(--muted)}.avatar{width:26px;height:26px;border-radius:50%}.layout{flex:1;display:grid;grid-template-columns:280px 1fr;min-height:0}.sidebar{border-right:1px solid var(--border);overflow:auto;padding:12px;background:var(--bg-alt)}.viewer{overflow:auto;min-width:0}.empty{height:100%;display:grid;place-items:center;color:var(--muted)}.tree{display:flex;flex-direction:column;gap:2px}.tree-search{width:100%;padding:6px 8px;margin-bottom:8px;border:1px solid var(--border);border-radius:6px;background:var(--bg);color:var(--text);font-size:13px}.tree-row{display:flex;align-items:center;gap:6px;padding:4px 6px;border-radius:6px;cursor:pointer;-webkit-user-select:none;user-select:none;white-space:nowrap}.tree-row:hover{background:color-mix(in srgb,var(--primary) 10%,transparent)}.tree-row.selected{background:color-mix(in srgb,var(--primary) 20%,transparent)}.tree-row:focus-visible{outline:2px solid var(--primary);outline-offset:-2px}.twisty{width:12px;color:var(--muted);font-size:10px}.tree-icon{font-size:14px}.tree-name{overflow:hidden;text-overflow:ellipsis}.tree-hint{color:var(--muted);font-size:12px;padding:4px 6px}.tree-hint.error{color:var(--danger)}.viewer-pane{display:flex;flex-direction:column;height:100%}.viewer-bar{display:flex;align-items:center;gap:12px;padding:8px 14px;border-bottom:1px solid var(--border);min-height:44px}.breadcrumb{flex:1;font-size:13px;color:var(--muted);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.crumb.current{color:var(--text);font-weight:600}.viewer-body{flex:1;min-height:0;position:relative}.frame{width:100%;height:100%;border:0;background:#fff}.media-wrap{height:100%;overflow:auto;display:grid;place-items:center;padding:16px;background:var(--bg-alt)}.media-img{max-width:100%;height:auto}.text-view{margin:0;padding:16px;height:100%;overflow:auto;white-space:pre-wrap;word-break:break-word;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:13px}.btn.small{padding:4px 10px;font-size:13px}@media(max-width:720px){.layout{grid-template-columns:1fr}.sidebar{display:none}}