:root,[data-theme=light]{--bg-base: #f5f5f5;--bg-elevated: #ffffff;--border-color: #f0f0f0;--text-secondary: rgba(0, 0, 0, .45);--step-accent: #1677ff}[data-theme=dark]{--bg-base: #141414;--bg-elevated: #1f1f1f;--border-color: #303030;--text-secondary: rgba(255, 255, 255, .45);--step-accent: #4096ff}body{margin:0;background:var(--bg-base);transition:background .2s}#root{min-height:100vh}.function-tree-panel{background:var(--bg-elevated);border:1px solid var(--border-color);border-radius:8px;padding:12px;height:100%}.step-list-panel{background:var(--bg-elevated);border:1px solid var(--border-color);border-radius:8px;padding:12px;min-height:420px;max-height:520px;overflow-y:auto}