:root{--bg: #1a1b26;--bg-alt: #16161e;--panel: #1f2030;--panel-2: #24263a;--border: #2c2e44;--text: #c7c9d9;--text-dim: #7a7d9c;--accent: #6d5efc;--accent-2: #8b7dff;--green: #41d18e;--red: #f7768e;--yellow: #e0af68;--radius: 8px;font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,sans-serif}*{box-sizing:border-box}html,body,#root{height:100%;margin:0}body{background:var(--bg);color:var(--text);font-size:14px}button{font:inherit;cursor:pointer}input,select,textarea{font:inherit}.app{display:grid;grid-template-columns:260px 220px 1fr;grid-template-rows:48px 1fr;grid-template-areas:"topbar topbar topbar" "sidebar filetree editor";height:100%}.topbar{grid-area:topbar;display:flex;align-items:center;justify-content:space-between;padding:0 16px;background:var(--bg-alt);border-bottom:1px solid var(--border)}.brand{display:flex;align-items:center;gap:10px;font-weight:700;letter-spacing:.3px}.brand 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