*{margin:0;padding:0;box-sizing:border-box}:root{--primary-color: #4f46e5;--primary-hover: #4338ca;--secondary-color: #10b981;--background: #f9fafb;--card-bg: #ffffff;--text-primary: #1f2937;--text-secondary: #6b7280;--border-color: #e5e7eb;--shadow: 0 4px 6px -1px rgba(0, 0, 0, .1), 0 2px 4px -1px rgba(0, 0, 0, .06);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .1), 0 4px 6px -2px rgba(0, 0, 0, .05)}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;background:linear-gradient(135deg,#667eea,#764ba2);min-height:100vh;padding:20px;color:var(--text-primary)}.container{max-width:900px;margin:0 auto}header{text-align:center;color:#fff;margin-bottom:40px;padding:20px}header h1{font-size:2.5rem;margin-bottom:10px;font-weight:700}.subtitle{font-size:1.1rem;opacity:.9}main{display:flex;flex-direction:column;gap:24px}.card{background:var(--card-bg);border-radius:16px;padding:32px;box-shadow:var(--shadow-lg);transition:transform .2s ease}.card:hover{transform:translateY(-2px)}.step-header{display:flex;align-items:center;gap:16px;margin-bottom:24px}.step-number{width:40px;height:40px;background:linear-gradient(135deg,var(--primary-color),var(--primary-hover));color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:1.2rem;flex-shrink:0}.step-header h2{font-size:1.5rem;font-weight:600;color:var(--text-primary)}.upload-area{position:relative}.file-input{position:absolute;opacity:0;width:0;height:0}.file-label{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:48px 24px;border:2px dashed var(--border-color);border-radius:12px;cursor:pointer;transition:all .3s ease;background:var(--background);color:var(--text-secondary)}.file-label:hover{border-color:var(--primary-color);background:#eef2ff;color:var(--primary-color)}.file-label svg{margin-bottom:12px}.file-label span:first-of-type{font-size:1.1rem;font-weight:600;margin-bottom:8px;color:var(--text-primary)}.file-info{font-size:.9rem;color:var(--text-secondary)}.file-input:focus+.file-label{outline:2px solid var(--primary-color);outline-offset:2px}.preview-section{margin-top:20px;padding:16px;background:var(--background);border-radius:8px;display:none}.preview-section.active{display:block}.preview-section h4{color:var(--text-primary);margin-bottom:12px;font-size:1rem}.preview-table{width:100%;overflow-x:auto}table{width:100%;border-collapse:collapse;font-size:.9rem}thead{background:var(--primary-color);color:#fff}th,td{padding:12px;text-align:left;border-bottom:1px solid var(--border-color)}tbody tr:hover{background:var(--background)}.file-selected{display:flex;align-items:center;gap:12px;padding:12px 16px;background:#dcfce7;border:1px solid #86efac;border-radius:8px;color:#166534;font-weight:500}.file-selected svg{flex-shrink:0}.format-selection{display:flex;gap:16px;margin-bottom:24px;flex-wrap:wrap}.format-selection label{display:flex;align-items:center;gap:8px;padding:12px 20px;border:2px solid var(--border-color);border-radius:8px;cursor:pointer;transition:all .2s ease;font-weight:500}.format-selection label:hover{border-color:var(--primary-color);background:#eef2ff}.format-selection input[type=radio]{cursor:pointer}.format-selection input[type=radio]:checked+span{color:var(--primary-color)}.format-selection label:has(input:checked){border-color:var(--primary-color);background:#eef2ff}.generate-btn{width:100%;padding:16px 32px;background:linear-gradient(135deg,var(--primary-color),var(--primary-hover));color:#fff;border:none;border-radius:12px;font-size:1.1rem;font-weight:600;cursor:pointer;transition:all .3s ease;display:flex;align-items:center;justify-content:center;gap:12px;box-shadow:var(--shadow)}.generate-btn:hover:not(:disabled){transform:translateY(-2px);box-shadow:var(--shadow-lg)}.generate-btn:disabled{opacity:.5;cursor:not-allowed}.generate-btn:active:not(:disabled){transform:translateY(0)}.progress-section{margin-top:24px}.progress-bar{width:100%;height:12px;background:var(--border-color);border-radius:6px;overflow:hidden;margin-bottom:12px}.progress-fill{height:100%;background:linear-gradient(90deg,var(--secondary-color),#34d399);transition:width .3s ease;width:0%}.progress-text{text-align:center;color:var(--text-secondary);font-weight:500}.results-section{margin-top:24px;padding:20px;background:#dcfce7;border:2px solid #86efac;border-radius:12px;text-align:center}.results-section h3{color:#166534;margin-bottom:8px;font-size:1.3rem}.results-section p{color:#166534;font-weight:500}.instructions{background:linear-gradient(135deg,#eef2ff,#fef3c7)}.instructions h3{margin-bottom:16px;color:var(--text-primary);font-size:1.3rem}.instructions ol{margin-left:24px;margin-bottom:20px}.instructions li{margin-bottom:8px;color:var(--text-primary);line-height:1.6}.instructions code{background:#fff;padding:2px 8px;border-radius:4px;font-family:Courier New,monospace;color:var(--primary-color);font-weight:600}.example-note{background:#fff;padding:16px;border-radius:8px;border-left:4px solid var(--primary-color)}.example-note strong{display:block;margin-bottom:8px;color:var(--text-primary)}.example-note p{color:var(--text-secondary);line-height:1.6}footer{text-align:center;color:#fff;margin-top:40px;padding:20px;font-size:.9rem;opacity:.9}@keyframes fadeIn{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.card{animation:fadeIn .5s ease}.card:nth-child(2){animation-delay:.1s}.card:nth-child(3){animation-delay:.2s}.card:nth-child(4){animation-delay:.3s}@media (max-width: 768px){header h1{font-size:2rem}.subtitle{font-size:1rem}.card{padding:24px}.step-header h2{font-size:1.2rem}.format-selection{flex-direction:column}.format-selection label{width:100%}}