:root{--bg: #f5f5f7;--text: #1d1d1f;--surface: #ffffff;--primary: #0071e3;--primary-hover: #0060c0;--border: #d2d2d7;--input-border: #d2d2d7;--hover: #f5f5f7;--active-bg: #e8f0fe;--muted: #86868b;--tag-bg: #f5f5f7;--tag-accent-bg: #e8f0fe;--tag-accent-text: #0071e3;--code-bg: #f5f5f7;--light-border: #e8e8ed;--error-bg: #fff0f0;--error-border: #ffccc7;--error-text: #cf1322;--success-bg: #f0fff0;--success-border: #b7eb8f;--success-text: #389e0d;--overlay: rgba(0,0,0,.4);--shadow: 0 8px 30px rgba(0,0,0,.1);--text-secondary: #555;--placeholder: #aaa}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--text);font-size:14px;line-height:1.6}.app{display:flex;flex-direction:column;height:100vh}.app-header{display:flex;justify-content:space-between;align-items:center;padding:12px 20px;background:var(--surface);border-bottom:1px solid var(--border);flex-shrink:0}.app-header h1{font-size:18px;font-weight:600}.header-actions{display:flex;align-items:center;gap:12px}.config-status{font-size:12px;color:var(--muted);background:var(--tag-bg);padding:2px 8px;border-radius:4px}.btn-settings{background:none;border:1px solid var(--input-border);padding:4px 14px;border-radius:4px;cursor:pointer;font-size:12px;color:var(--text)}.btn-settings:hover{background:var(--hover)}.app-body{display:flex;flex:1;overflow:hidden}.sidebar{width:290px;background:var(--surface);border-right:1px solid var(--border);overflow-y:auto;flex-shrink:0}.module-list-header{padding:12px 16px 6px;font-weight:600;font-size:13px;color:var(--muted);text-transform:uppercase;letter-spacing:.5px}.module-item{padding:3px 16px;cursor:pointer;border-left:3px solid transparent;transition:background 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