:root{--bg: #f4f4f2;--panel: #ffffff;--border: #d5d5d0;--ink: #1d1d1b;--ink-muted: #6b6b66;--accent: #4a5d23;--mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;--sans: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif}*{box-sizing:border-box}html,body{height:100%;margin:0}body{display:grid;grid-template-rows:auto 1fr auto;font-family:var(--sans);background:var(--bg);color:var(--ink)}.app-header{padding:.75rem 1.25rem;border-bottom:2px solid var(--accent);background:var(--panel);display:flex;align-items:baseline;gap:1rem;flex-wrap:wrap}.app-header h1{margin:0;font-size:1.25rem}.tagline{margin:0;color:var(--ink-muted);font-size:.875rem}.app-main{display:grid;grid-template-columns:1fr 1fr;gap:1rem;padding:1rem 1.25rem;min-height:0}.pane{display:grid;grid-template-rows:auto 1fr;min-height:0;min-width:0;background:var(--panel);border:1px solid 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