:root{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;line-height:1.5;font-weight:400;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}*{margin:0;padding:0;box-sizing:border-box}body{margin:0;min-width:320px;min-height:100vh}#root{min-height:100vh}:root{--primary-color: #6366f1;--primary-light: #818cf8;--secondary-color: #4f46e5;--accent-color: #a78bfa;--dark-bg: #0f172a;--card-bg: rgba(15, 23, 42, .7);--text-primary: #f8fafc;--text-secondary: #94a3b8;--border-radius: 16px;--box-shadow: 0 10px 25px rgba(99, 102, 241, .1);--glass-effect: rgba(15, 23, 42, .7);--transition: all .3s cubic-bezier(.4, 0, .2, 1)}*{box-sizing:border-box;margin:0;padding:0}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica 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#6366f14d}.App-main{flex:1;padding:2rem;display:flex;flex-direction:column;align-items:center;justify-content:center}body:before{content:"";position:fixed;inset:0;background-image:linear-gradient(rgba(255,255,255,.03) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.03) 1px,transparent 1px);background-size:30px 30px;z-index:-1}#root{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:2rem 1rem}.app-container{background:var(--glass-effect);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border-radius:var(--border-radius);border:1px solid rgba(255,255,255,.1);box-shadow:var(--box-shadow);padding:2.5rem;max-width:1000px;width:100%;position:relative;overflow:hidden;transition:var(--transition);min-height:80vh;display:flex;flex-direction:column}.app-container:before{content:"";position:absolute;top:-50%;left:-50%;width:200%;height:200%;background:radial-gradient(circle at center,rgba(99,102,241,.1) 0%,transparent 70%);animation:rotate 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.75rem;font-size:.8rem}.no-action{color:var(--text-secondary)}.loading-message,.empty-message{text-align:center;padding:2rem;color:var(--text-secondary)}.pagination-controls{display:flex;justify-content:center;align-items:center;gap:1rem;margin-top:1.5rem}input[type=file]:disabled{opacity:0;cursor:pointer}input[type=file]:disabled+.file-upload-label{opacity:1;color:var(--text-secondary);cursor:default}.preview-btn{display:inline-block;padding:1rem 1.75rem;background:linear-gradient(90deg,#f97316,#fb923c);color:#fff;text-decoration:none;border-radius:var(--border-radius);font-weight:600;transition:var(--transition);position:relative;overflow:hidden;z-index:1;letter-spacing:.5px}.preview-btn:before{content:"";position:absolute;top:0;left:-100%;width:100%;height:100%;background:linear-gradient(90deg,transparent,rgba(255,255,255,.25),transparent);transition:var(--transition);z-index:-1}.preview-btn:hover{transform:translateY(-2px);box-shadow:0 10px 25px 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#6366f14d}input[type=range]:disabled{opacity:.6;cursor:not-allowed}.pitch-value{text-align:center;font-weight:600;color:var(--accent-color);margin-top:.5rem;font-size:1.1rem;letter-spacing:.5px}.process-btn{padding:1.1rem 2rem;background:linear-gradient(90deg,var(--primary-color),var(--secondary-color));color:#fff;border:none;border-radius:var(--border-radius);font-size:1rem;font-weight:600;cursor:pointer;transition:var(--transition);position:relative;overflow:hidden;z-index:1;letter-spacing:.5px}.process-btn:before{content:"";position:absolute;top:0;left:-100%;width:100%;height:100%;background:linear-gradient(90deg,transparent,rgba(255,255,255,.2),transparent);transition:var(--transition);z-index:-1}.process-btn:hover:not(:disabled){transform:translateY(-2px);box-shadow:0 15px 30px #6366f14d}.process-btn:hover:not(:disabled):before{left:100%}.process-btn:active:not(:disabled){transform:translateY(0);box-shadow:0 8px 20px 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h2{margin:0;color:#333;font-size:20px}.close-button{background:none;border:none;font-size:24px;cursor:pointer;color:#666;padding:0;width:30px;height:30px;display:flex;justify-content:center;align-items:center;border-radius:4px;transition:background-color .2s}.close-button:hover{background-color:#f0f0f0}.auth-error{background-color:#fef2f2;color:#b91c1c;padding:10px;border-radius:4px;margin-bottom:16px;font-size:14px}.auth-form{display:flex;flex-direction:column}.form-group{margin-bottom:16px}.form-group label{display:block;margin-bottom:6px;font-weight:500;color:#333;font-size:14px}.form-group input{width:100%;padding:10px 12px;border:1px solid #d1d5db;border-radius:6px;font-size:16px;transition:border-color .2s;box-sizing:border-box}.form-group input:focus{outline:none;border-color:#3b82f6;box-shadow:0 0 0 3px #3b82f61a}.form-group 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