:root{font-family:system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;line-height:1.6;font-weight:400;--bg-primary: #ffffff;--bg-secondary: #f5f5f5;--text-primary: #333333;--text-secondary: #666666;--border-color: #dddddd;--accent-color: #646cff;--accent-hover: #535bf2;--match-highlight: #ffeb3b;--success-color: #4caf50;--code-bg: #f4f4f4;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}*{box-sizing:border-box}body{margin:0;padding:0;min-width:320px;background-color:var(--bg-primary);color:var(--text-primary)}#app{max-width:1400px;margin:0 auto;padding:1rem}.header{text-align:center;padding:2rem 1rem;border-bottom:2px solid var(--border-color);margin-bottom:2rem;position:relative}.language-switcher{position:absolute;top:1rem;right:1rem;display:flex;gap:.5rem}.lang-button{padding:.5rem 1rem;border:1px solid var(--border-color);background-color:var(--bg-primary);color:var(--text-secondary);border-radius:4px;cursor:pointer;font-size:.9rem;transition:all .2s}.lang-button:hover{background-color:var(--bg-secondary);border-color:var(--accent-color)}.lang-button.active{background-color:var(--accent-color);color:#fff;border-color:var(--accent-color)}.header h1{margin:0;font-size:2.5rem;color:var(--accent-color)}.subtitle{margin:.5rem 0 0;color:var(--text-secondary);font-size:1.1rem}.main-container{display:flex;flex-direction:column;gap:2rem}section{background-color:var(--bg-secondary);border:1px solid var(--border-color);border-radius:8px;padding:1.5rem}section h2{margin:0 0 1rem;font-size:1.5rem;color:var(--text-primary);border-bottom:2px solid var(--accent-color);padding-bottom:.5rem}section h3{margin:0 0 .75rem;font-size:1.2rem;color:var(--text-primary)}.blockly-workspace{height:500px;width:100%;border:2px solid var(--border-color);border-radius:4px;background-color:#fff}.regex-display{display:flex;align-items:center;gap:1rem;margin-bottom:1rem;flex-wrap:wrap}.regex-code{flex:1;min-width:200px;padding:1rem;background-color:var(--code-bg);border:1px solid var(--border-color);border-radius:4px;font-family:Courier New,monospace;font-size:1.2rem;word-break:break-all}.copy-button{padding:.75rem 1.5rem;background-color:var(--accent-color);color:#fff;border:none;border-radius:4px;font-size:1rem;font-weight:500;cursor:pointer;transition:background-color .2s}.copy-button:hover{background-color:var(--accent-hover)}.copy-button:active{transform:scale(.98)}.flags-container{display:flex;gap:1.5rem;flex-wrap:wrap}.flag-label{display:flex;align-items:center;gap:.5rem;cursor:pointer;font-size:1rem}.flag-checkbox{width:18px;height:18px;cursor:pointer}.test-textarea{width:100%;min-height:150px;padding:1rem;border:1px solid var(--border-color);border-radius:4px;font-family:Courier New,monospace;font-size:1rem;resize:vertical;margin-bottom:1rem}.test-textarea:focus{outline:2px solid var(--accent-color);outline-offset:2px}.match-results{background-color:#fff;border:1px solid var(--border-color);border-radius:4px;padding:1rem}.match-count{font-weight:700;color:var(--success-color);margin-bottom:.75rem;font-size:1.1rem}.match-details{font-family:Courier New,monospace;font-size:.95rem;color:var(--text-secondary);max-height:200px;overflow-y:auto}.match-highlight{background-color:gold;padding:2px 0;border-radius:2px;font-weight:500}.highlighted-text{background-color:#f5f5f5;border:1px solid #ddd;border-radius:4px;padding:1rem;margin-bottom:1rem;font-family:Courier New,monospace;font-size:.95rem;line-height:1.6;white-space:pre-wrap;word-wrap:break-word;overflow-wrap:break-word}.match-list{border-top:1px solid #eee;padding-top:.5rem}.match-list>div{padding:.25rem 0}@media(min-width:768px){.main-container{gap:2rem}.blockly-workspace{height:600px}}@media(min-width:1024px){#app{padding:1.5rem}.header h1{font-size:3rem}.subtitle{font-size:1.2rem}}@media(max-width:767px){.header h1{font-size:2rem}.subtitle{font-size:1rem}.language-switcher{position:static;justify-content:center;margin-bottom:1rem}section{padding:1rem}.blockly-workspace{height:400px}.regex-display{flex-direction:column;align-items:stretch}.copy-button{width:100%}.flags-container{flex-direction:column;gap:.75rem}}body.embed-mode{margin:0;padding:0}body.embed-mode #app{max-width:none;margin:0;padding:0;height:100vh;display:flex;flex-direction:column}body.embed-mode .header{display:none}body.embed-mode .main-container{gap:.5rem;padding:.5rem;flex:1;overflow:hidden}body.embed-mode section{border-radius:4px;padding:1rem}body.embed-mode section h2{font-size:1.2rem;margin-bottom:.75rem}body.embed-mode .blockly-workspace{height:400px}body.embed-mode .editor-section{flex:1;display:flex;flex-direction:column;min-height:0}body.embed-mode .editor-section .blockly-workspace{flex:1;height:auto}body.embed-mode .regex-output-section,body.embed-mode .test-section{padding:.75rem}body.embed-mode .test-textarea{min-height:100px}body.embed-mode .match-details{max-height:150px}