:root{font-family:Inter,ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,"Helvetica Neue",Arial}*{box-sizing:border-box;margin:0;padding:0}body{max-width:920px;margin:28px auto;padding:20px;background:#fafafa;color:#111}.container{max-width:100%}h1{font-size:22px;margin:0 0 8px;display:flex;align-items:center;gap:8px;font-weight:700}p.small{margin:0 0 12px;color:#555;font-size:14px}.row{display:flex;gap:12px;align-items:center;margin-bottom:0}.box{border-radius:10px;padding:14px;background:#fff;border:1px solid #eee;margin-bottom:12px}label{display:block;margin-bottom:6px;font-weight:600;font-size:14px}textarea{width:100%;min-height:120px;padding:10px;border:1px solid #ddd;border-radius:8px;font-size:14px;font-family:inherit;resize:vertical;outline:none;transition:border .2s}textarea:focus{border-color:#0b61ff}select,input,button{padding:8px 12px;border-radius:8px;border:1px solid #ccc;background:#fff;font-size:14px;font-family:inherit;outline:none;transition:border .2s}select{width:100%}select:focus{border-color:#0b61ff}button{cursor:pointer;font-weight:600;transition:background .2s,transform .1s}button:active{transform:scale(.97)}button:disabled{opacity:.5;cursor:not-allowed}#submit{background:#0b61ff;color:#fff;border-color:#0b61ff}#submit:hover:not(:disabled){background:#0a52d9}#clear{background:#fff;color:#666}#clear:hover{background:#f5f5f5}#charcount{font-weight:600;font-size:13px}#error{display:none;background:#fff6f6;border-color:#f5c6cb;color:#8a1f1f}.error-box i{color:#dc3545}#success{display:none;background:#f0fff4;border-color:#c3e6cb}.success-box i{color:#28a745}audio{width:100%;margin-top:10px}.muted{color:#666;font-size:13px}.controls{display:flex;gap:8px;margin-top:4px}.controls button{flex:1;text-align:center}.hidden{display:none}.note{font-size:13px;color:#444}a{color:#0b61ff;text-decoration:none}a:hover{text-decoration:underline}#download{display:inline-flex;align-items:center;gap:6px;margin-top:8px;padding:8px 16px;background:#0b61ff;color:#fff;border-radius:8px;font-weight:600;font-size:14px}#download:hover{background:#0a52d9;text-decoration:none}.progress-container{margin-top:10px;margin-bottom:10px}.progress-bar{height:10px;background-color:#e0e0e0;border-radius:5px;overflow:hidden}.progress{height:100%;background:linear-gradient(90deg,#4CAF50,#45a049);width:0%;transition:width .3s}.progress-text{margin-top:5px;font-size:12px;color:#666}.split-options{margin-bottom:12px}.split-options label{font-weight:600;margin-bottom:5px;display:block;font-size:14px}.debug-info{margin-top:10px;padding:10px;background-color:#f5f5f5;border-radius:8px;font-size:12px;color:#666;max-height:200px;overflow-y:auto;border:1px solid #e0e0e0}.debug-info strong{color:#333}select optgroup{font-weight:600;font-style:normal}select option{font-weight:400;padding:2px 8px}