:root{font-family:system-ui,Avenir,Helvetica,Arial,sans-serif;line-height:1.5;font-weight:400;color-scheme:light dark;color:#ffffffde;background-color:#242424;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}a{font-weight:500;color:#646cff;text-decoration:inherit}a:hover{color:#535bf2}body{margin:0;display:flex;place-items:center;min-width:320px;min-height:100vh}h1{font-size:3.2em;line-height:1.1}button{border-radius:8px;border:1px solid transparent;padding:.6em 1.2em;font-size:1em;font-weight:500;font-family:inherit;background-color:#1a1a1a;cursor:pointer;transition:border-color .25s}button:hover{border-color:#646cff}button:focus,button:focus-visible{outline:4px auto -webkit-focus-ring-color}@media(prefers-color-scheme:light){:root{color:#213547;background-color:#fff}a:hover{color:#747bff}button{background-color:#f9f9f9}}.app{min-height:100vh;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#667eea,#764ba2);padding:20px}.container{background:#fff;border-radius:20px;padding:40px;box-shadow:0 20px 60px #0000004d;max-width:600px;width:100%}h1{color:#333;margin:0 0 10px;font-size:2.5rem}.subtitle{color:#666;margin:0 0 30px}.dropzone{border:3px dashed #ddd;border-radius:15px;padding:60px 20px;text-align:center;cursor:pointer;transition:all .3s ease;position:relative;background:#fafafa}.dropzone:hover{border-color:#667eea;background:#f0f4ff}.dropzone.dragging{border-color:#667eea;background:#e8edff;transform:scale(1.02)}.dropzone-content{position:relative}.upload-icon{width:80px;height:80px;margin:0 auto 20px;color:#667eea}.file-input{position:absolute;top:0;left:0;width:100%;height:100%;opacity:0;cursor:pointer}.file-info{margin:20px 0}.file-name{font-weight:700;color:#333;margin:0 0 5px;font-size:1.1rem}.file-size{color:#666;margin:0}.main-text{font-size:1.2rem;color:#333;margin:0 0 10px}.sub-text{color:#999;margin:0}.error{background:#ffe6e6;color:#d32f2f;padding:15px;border-radius:10px;margin:20px 0;border:1px solid #ffcccc}.button-group{display:flex;flex-direction:column;gap:12px;justify-content:center;margin-top:30px;max-width:400px;margin-left:auto;margin-right:auto}.button-group .btn{width:100%}.btn{padding:15px 40px;border:none;border-radius:10px;font-size:1rem;font-weight:700;cursor:pointer;transition:all .3s ease}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-primary{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff}.btn-primary:hover:not(:disabled){transform:translateY(-2px);box-shadow:0 5px 20px #667eea66}.btn-secondary{background:#e0e0e0;color:#666}.btn-secondary:hover{background:#d0d0d0}.btn-success{background:linear-gradient(135deg,#11998e,#38ef7d);color:#fff}.btn-success:hover{transform:translateY(-2px);box-shadow:0 5px 20px #11998e66}.btn-notebook{background:linear-gradient(135deg,#f093fb,#f5576c);color:#fff}.btn-notebook:hover{transform:translateY(-2px);box-shadow:0 5px 20px #f093fb66}.result{text-align:center;padding:40px 20px}.success-icon{width:100px;height:100px;background:linear-gradient(135deg,#11998e,#38ef7d);border-radius:50%;display:flex;align-items:center;justify-content:center;margin:0 auto 30px;font-size:3rem;color:#fff;animation:scaleIn .5s ease}@keyframes scaleIn{0%{transform:scale(0)}to{transform:scale(1)}}.result h2{color:#333;margin:0 0 15px}.result-filename{color:#666;margin:0 0 30px;word-break:break-all}.help-text{margin-top:20px;padding:15px;background:#f0f4ff;border-radius:10px;color:#555;font-size:.95rem;line-height:1.5}.progress-container{margin:20px 0;padding:20px;background:#f9f9f9;border-radius:10px}.progress-bar{width:100%;height:30px;background:#e0e0e0;border-radius:15px;overflow:hidden;position:relative}.progress-fill{height:100%;background:linear-gradient(135deg,#667eea,#764ba2);border-radius:15px;transition:width .3s ease;position:relative;overflow:hidden}.progress-fill:after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,transparent,rgba(255,255,255,.3),transparent);animation:shimmer 2s infinite}@keyframes shimmer{0%{transform:translate(-100%)}to{transform:translate(100%)}}.progress-text{text-align:center;color:#666;margin:10px 0 0;font-weight:600;font-size:.95rem}