:root{--primary-color:#4a6fa5;--secondary-color:#6c757d;--background-color:#f8f9fa;--text-color:#212529;--border-color:#dee2e6;--input-background:#ffffff;--button-hover:#3a5a84;--error-color:#dc3545;--success-color:#28a745;--transition-speed:0.3s;--border-radius:0.375rem;--box-shadow:0 4px 6px rgba(0,0,0,0.1)}body.dark-mode{--primary-color:#5b8dd6;--secondary-color:#adb5bd;--background-color:#212529;--text-color:#f8f9fa;--border-color:#495057;--input-background:#343a40;--button-hover:#6c9fe3;--error-color:#e05260;--success-color:#48c774}*{box-sizing:border-box;margin:0;padding:0}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Open Sans,Helvetica Neue,sans-serif;line-height:1.5;color:var(--text-color);background-color:var(--background-color);transition:background-color var(--transition-speed),color var(--transition-speed)}.encoder-container{max-width:1200px;margin:0 auto;padding:2rem 1rem}@media(max-width:768px){.encoder-container{padding:1rem}}.header{display:flex;justify-content:space-between;align-items:center;margin-bottom:2rem}.header h1{font-size:2.5rem;margin-bottom:0}@media(max-width:576px){.header h1{font-size:2rem}}.theme-toggle{background:none;border:none;font-size:1.5rem;cursor:pointer;padding:.5rem;border-radius:var(--border-radius);transition:background-color var(--transition-speed)}.theme-toggle:hover{background-color:var(--border-color)}.theme-toggle:focus{outline:2px solid var(--primary-color);outline-offset:2px}.mode-toggle{display:flex;margin-bottom:1.5rem;border-radius:var(--border-radius);overflow:hidden;border:1px solid var(--border-color);width:fit-content}.mode-button{padding:.75rem 1.5rem;border:none;background-color:var(--input-background);color:var(--text-color);cursor:pointer;transition:background-color var(--transition-speed),color var(--transition-speed)}.mode-button.active{background-color:var(--primary-color);color:#fff}.mode-button:hover:not(.active){background-color:var(--border-color)}.mode-button:focus{outline:2px solid var(--primary-color);outline-offset:-2px;position:relative;z-index:1}.input-section,.output-section{margin-bottom:1.5rem}.input-section label,.output-section label{display:block;margin-bottom:.5rem;font-weight:600}.input-section textarea,.output-section textarea{width:100%;padding:.75rem;border:1px solid var(--border-color);border-radius:var(--border-radius);resize:vertical;min-height:150px;background-color:var(--input-background);color:var(--text-color);font-family:inherit;font-size:1rem;transition:border-color var(--transition-speed)}.input-section textarea:focus,.output-section textarea:focus{outline:none;border-color:var(--primary-color);box-shadow:0 0 0 2px rgba(74,111,165,.25)}.button-group{display:flex;gap:1rem;margin-bottom:1.5rem}@media(max-width:576px){.button-group{flex-direction:column}}.action-button{padding:.75rem 1.5rem;background-color:var(--primary-color);color:#fff;border:none;border-radius:var(--border-radius);cursor:pointer;font-weight:600;transition:background-color var(--transition-speed)}.action-button:hover{background-color:var(--button-hover)}.action-button:focus{outline:2px solid var(--primary-color);outline-offset:2px}.copy-button{margin-top:.5rem;padding:.5rem 1rem;background-color:var(--secondary-color);color:#fff;border:none;border-radius:var(--border-radius);cursor:pointer;font-weight:600;transition:background-color var(--transition-speed)}.copy-button:hover{background-color:rgb(84.3605150215,91.3905579399,97.6394849785)}.copy-button:focus{outline:2px solid var(--secondary-color);outline-offset:2px}.error-message{background-color:var(--error-color);color:#fff;padding:.75rem;margin-bottom:1.5rem}.error-message,.info-section{border-radius:var(--border-radius)}.info-section{margin-top:2rem;padding:1.5rem;background-color:var(--input-background);border:1px solid var(--border-color)}.info-section h2{font-size:1.5rem}.info-section h2,.info-section p{margin-bottom:1rem}.entity-table{width:100%;border-collapse:collapse;margin-top:1rem}.entity-table caption{font-weight:600;margin-bottom:.5rem;text-align:left}.entity-table td,.entity-table th{padding:.75rem;text-align:left;border-bottom:1px solid var(--border-color)}.entity-table th{font-weight:600;background-color:rgba(0,0,0,.05)}.entity-table tbody tr:hover{background-color:rgba(0,0,0,.03)}footer{margin-top:3rem;padding-top:1.5rem;border-top:1px solid var(--border-color);text-align:center;font-size:.875rem;color:var(--secondary-color)}footer a{color:var(--primary-color);text-decoration:none;margin-left:.5rem}footer a:hover{text-decoration:underline}footer a:focus{outline:2px solid var(--primary-color);outline-offset:2px}@media(min-width:992px){.encoder-container{padding:3rem 2rem}.input-section textarea,.output-section textarea{min-height:200px}}@media(max-width:576px){.header h1{font-size:1.75rem}.mode-button{padding:.5rem 1rem}.action-button,.copy-button{width:100%}.info-section{padding:1rem}}:focus{outline:2px solid var(--primary-color);outline-offset:2px}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border-width:0}@media print{body{background-color:#fff;color:#000}.encoder-container{width:100%;max-width:none;padding:0}.button-group,.copy-button,.mode-toggle,.theme-toggle,footer a{display:none}textarea{border:1px solid #ccc}}