:root{--primary: #4f46e5;--primary-light: #6366f1;--primary-dark: #3730a3;--secondary: #6b7280;--success: #10b981;--warning: #f59e0b;--error: #ef4444;--background: #f8fafc;--surface: #ffffff;--border: #e5e7eb;--text: #1f2937;--text-secondary: #6b7280;--text-muted: #9ca3af;--radius: 12px;--shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, .1);--shadow: 0 4px 6px -1px rgba(0, 0, 0, .1);--shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, .1);--transition: all .2s cubic-bezier(.4, 0, .2, 1)}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;line-height:1.6;color:var(--text);background:var(--background);font-size:16px;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}.app{min-height:100vh;display:flex;flex-direction:column}.header{background:linear-gradient(135deg,var(--primary) 0%,var(--primary-light) 100%);color:#fff;padding:2rem 0;text-align:center;box-shadow:var(--shadow)}.header-content h1{font-size:2.5rem;font-weight:700;margin-bottom:.5rem}.header-content p{font-size:1.1rem;opacity:.9;font-weight:400}.main-content{flex:1;max-width:1200px;margin:0 auto;padding:2rem;width:100%}.workflow-steps{display:grid;gap:2rem;margin-bottom:2rem}.step-card{background:var(--surface);border-radius:var(--radius);box-shadow:var(--shadow-sm);border:1px solid var(--border);overflow:hidden;transition:var(--transition);opacity:.6}.step-card.active{opacity:1;box-shadow:var(--shadow);border-color:var(--primary)}.step-header{display:flex;align-items:center;gap:1rem;padding:1.5rem;background:linear-gradient(135deg,#f8fafc,#f1f5f9);border-bottom:1px solid var(--border)}.step-number{display:flex;align-items:center;justify-content:center;width:32px;height:32px;background:var(--primary);color:#fff;border-radius:50%;font-weight:600;font-size:.9rem}.step-header h3{font-size:1.25rem;font-weight:600;color:var(--text)}.upload-zone{padding:2rem}.upload-label{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:3rem 2rem;border:2px dashed var(--border);border-radius:var(--radius);background:linear-gradient(135deg,#4f46e505,#4f46e50d);cursor:pointer;transition:var(--transition);text-align:center}.upload-label:hover,.upload-label.drag-over{border-color:var(--primary);background:linear-gradient(135deg,#4f46e50d,#4f46e51a);transform:translateY(-2px);box-shadow:var(--shadow)}.upload-icon{color:var(--primary);margin-bottom:1rem}.upload-text{display:flex;flex-direction:column;gap:.5rem}.upload-text strong{font-size:1.1rem;color:var(--text)}.upload-text span{font-size:.9rem;color:var(--text-secondary)}.file-list{display:grid;gap:.75rem;margin-top:1rem}.file-item{background:var(--background);padding:1rem;border-radius:var(--radius);border:1px solid var(--border);display:flex;justify-content:space-between;align-items:center}.file-item h4{font-size:.9rem;font-weight:600;color:var(--text);margin-bottom:.25rem}.file-item p{font-size:.8rem;color:var(--text-secondary);margin:0}.file-type{display:inline-block;background:var(--primary);color:#fff;padding:.125rem .5rem;border-radius:4px;font-size:.7rem;font-weight:600;margin-left:.5rem}.controls{padding:2rem;display:grid;gap:1.5rem}.control-row{display:grid;gap:.5rem}.control-row label{font-size:.9rem;font-weight:600;color:var(--text)}.select-input,.number-input{padding:.75rem;border:1px solid var(--border);border-radius:var(--radius);font-size:1rem;background:var(--surface);transition:var(--transition)}.select-input:focus,.number-input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px #4f46e51a}.actions{padding:2rem;display:flex;gap:1rem;justify-content:center}.btn-primary,.btn-secondary{display:flex;align-items:center;gap:.5rem;padding:.75rem 1.5rem;border:none;border-radius:var(--radius);font-size:1rem;font-weight:600;cursor:pointer;transition:var(--transition);text-decoration:none}.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover:not(:disabled){background:var(--primary-dark);transform:translateY(-1px);box-shadow:var(--shadow)}.btn-primary:disabled{background:var(--secondary);cursor:not-allowed;opacity:.6;transform:none}.btn-secondary{background:transparent;color:var(--secondary);border:1px solid var(--border)}.btn-secondary:hover{background:var(--background);border-color:var(--secondary)}.status{margin:0 2rem 2rem;padding:1rem;border-radius:var(--radius);text-align:center;font-weight:500;border:1px solid var(--border);background:var(--surface)}.status.loading{background:linear-gradient(135deg,#4f46e51a,#4f46e50d);color:var(--primary);border-color:var(--primary)}.status.success{background:linear-gradient(135deg,#10b9811a,#10b9810d);color:var(--success);border-color:var(--success)}.status.error{background:linear-gradient(135deg,#ef44441a,#ef44440d);color:var(--error);border-color:var(--error)}.results{padding:0 2rem 2rem}.results h3{font-size:1.25rem;font-weight:600;margin-bottom:1rem;color:var(--text)}.result-item{background:var(--background);padding:1.5rem;border-radius:var(--radius);border:1px solid var(--border);margin-bottom:1rem;display:flex;justify-content:space-between;align-items:center;gap:1rem}.result-item h4{font-size:1rem;font-weight:600;color:var(--text);margin-bottom:.25rem}.result-item p{font-size:.9rem;color:var(--text-secondary);margin:0}.download-btn,.download-all-btn{display:flex;align-items:center;gap:.5rem;padding:.5rem 1rem;background:var(--success);color:#fff;border:none;border-radius:var(--radius);font-size:.9rem;font-weight:500;cursor:pointer;transition:var(--transition)}.download-btn:hover,.download-all-btn:hover{background:#059669;transform:translateY(-1px);box-shadow:var(--shadow-sm)}.download-all-btn{background:var(--warning);margin-top:1rem;padding:.75rem 1.5rem}.download-all-btn:hover{background:#d97706}.info-panel{background:var(--surface);border-radius:var(--radius);box-shadow:var(--shadow-sm);border:1px solid var(--border);overflow:hidden;margin-top:2rem}.info-toggle{display:flex;align-items:center;justify-content:space-between;padding:1rem 1.5rem;cursor:pointer;background:var(--background);border-bottom:1px solid var(--border);transition:var(--transition);font-weight:500;color:var(--text)}.info-toggle:hover{background:#f1f5f9}.info-content{padding:1.5rem;display:none}.info-content.show{display:block}.info-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:1rem;margin-bottom:1.5rem}.info-item h4{font-size:.9rem;font-weight:600;color:var(--text);margin-bottom:.5rem}.info-item p{font-size:.8rem;color:var(--text-secondary);margin:0}.info-notes{padding-top:1rem;border-top:1px solid var(--border)}.info-notes p{font-size:.8rem;color:var(--text-secondary);margin-bottom:.5rem}.file-warning{background:linear-gradient(135deg,#f59e0b1a,#f59e0b0d);border:1px solid var(--warning);border-radius:var(--radius);padding:1rem;margin:1rem 2rem}.file-warning strong{color:var(--warning);display:block;margin-bottom:.5rem}.file-warning p{color:var(--text-secondary);font-size:.9rem;margin:.25rem 0}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.status.loading:before{content:"⟳";display:inline-block;margin-right:.5rem;animation:spin 1s linear infinite}.status.success:before{content:"✓";display:inline-block;margin-right:.5rem}.status.error:before{content:"✗";display:inline-block;margin-right:.5rem}@media (max-width: 768px){.main-content{padding:1rem}.header-content h1{font-size:2rem}.upload-label{padding:2rem 1rem}.actions{flex-direction:column}.result-item{flex-direction:column;align-items:flex-start;gap:1rem}.info-grid{grid-template-columns:1fr}}