*{box-sizing:border-box;margin:0;padding:0}html{font-size:16px;scroll-padding-top:80px}body{font-family:Arial,Helvetica,sans-serif;line-height:1.6;background-color:#f4f4f4;color:#333;padding-top:70px;padding-bottom:100px}#app-header{position:fixed;top:0;left:0;width:100%;height:60px;background-color:#333;color:#fff;padding:0 20px;display:flex;justify-content:space-between;align-items:center;z-index:1000;border-bottom:2px solid #555}#app-header h1{font-size:1.5rem;margin:0}.header-nav .button{background-color:#555;color:#fff;padding:8px 15px;border:none;border-radius:4px;text-decoration:none;font-size:.9rem;cursor:pointer;transition:background-color .3s ease;display:inline-flex;align-items:center}.header-nav .button i{margin-right:8px}.header-nav .button:hover{background-color:#777}#app-main{max-width:900px;margin:20px auto;padding:20px;background-color:#fff;border-radius:8px;box-shadow:0 2px 5px rgba(0,0,0,.1)}.app-description{font-style:italic;color:#555;margin-bottom:25px;padding-bottom:15px;border-bottom:1px solid #eee;text-align:center}.io-section{margin-bottom:20px}.io-section label{display:block;margin-bottom:8px;font-weight:700;color:#444}textarea{width:100%;padding:10px;border:1px solid #ccc;border-radius:4px;font-family:'Courier New',Courier,monospace;font-size:.95rem;line-height:1.5;resize:vertical;background-color:#fdfdfd}textarea:focus{outline:0;border-color:#007bff;box-shadow:0 0 5px rgba(0,123,255,.5)}textarea[readonly]{background-color:#e9ecef;cursor:text}.controls-section{margin-bottom:20px;padding:15px;background-color:#f9f9f9;border:1px solid #eee;border-radius:4px}.controls-section label{display:block;margin-bottom:10px;font-weight:700}.format-options label{display:inline-block;margin-right:15px;font-weight:400;cursor:pointer}.format-options input[type=radio]{margin-right:5px;vertical-align:middle}.output-section button{margin-top:10px;padding:10px 15px;background-color:#28a745;color:#fff;border:none;border-radius:4px;cursor:pointer;transition:background-color .3s ease;font-size:1rem}.output-section button:hover:not(:disabled){background-color:#218838}.output-section button:disabled{background-color:#ccc;cursor:not-allowed}#app-footer{position:fixed;bottom:0;left:0;width:100%;background-color:#333;color:#ccc;padding:15px 20px;text-align:center;font-size:.9rem;z-index:1000;border-top:2px solid #555;max-height:80px;overflow-y:auto;transition:max-height .5s ease-in-out}#app-footer a{color:#a0cfff;text-decoration:none}#app-footer a:hover{text-decoration:underline}.disclaimer-link{cursor:pointer;text-decoration:underline;color:#a0cfff;margin-left:10px}.disclaimer-text{margin-top:10px;padding:10px;background-color:#444;border-radius:4px;font-size:.8rem;text-align:left;color:#ddd;border-top:1px solid #666}.disclaimer-text p{margin-bottom:8px}.error-message{color:#dc3545;font-size:.9em;margin-top:5px;min-height:1.2em}@media (max-width:600px){#app-header{flex-direction:column;height:auto;padding:10px}#app-header h1{font-size:1.3rem;margin-bottom:5px}.header-nav .button{font-size:.8rem;padding:6px 10px}body{padding-top:90px}#app-main{margin:10px;padding:15px}.format-options label{display:block;margin-bottom:5px;margin-right:0}}