:root{font-family:Inter,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;-webkit-text-size-adjust:100%}body{margin:0;display:flex;place-items:center;min-width:320px;min-height:100vh;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background-color:#f5f7fa;color:#333}#root{width:100%;margin:0 auto;text-align:center}a{font-weight:500;color:#646cff;text-decoration:inherit}a:hover{color:#535bf2}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;color:#fff;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}}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background-color:#f5f7fa;color:#333}.App{min-height:100vh;display:flex;flex-direction:column}.App-header{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;padding:2rem 0;text-align:center;box-shadow:0 2px 10px #0000001a}.App-header h1{font-size:2.5rem;margin-bottom:1rem;font-weight:700}.App-header p{font-size:1.1rem;opacity:.9}.navigation{display:flex;justify-content:center;gap:2rem;margin-top:1rem}.nav-link{color:#fff;text-decoration:none;font-weight:600;font-size:1.1rem;padding:.5rem 1rem;border-radius:6px;transition:all .2s ease;background-color:#ffffff1a}.nav-link:hover{background-color:#fff3;transform:translateY(-2px)}.nav-link.active{background-color:#ffffff4d}.App-main{flex:1;max-width:1200px;margin:0 auto;padding:2rem;width:100%}.upload-section{background:#fff;border-radius:12px;padding:2rem;margin-bottom:2rem;box-shadow:0 4px 6px #0000000d}.upload-section h2{color:#2d3748;margin-bottom:1rem;font-size:1.5rem;font-weight:600}.requirements-info{background:#ebf8ff;border:1px solid #bee3f8;border-radius:8px;padding:1rem;margin-bottom:1.5rem}.requirements-info p{color:#2b6cb0;margin:0;font-size:.95rem}.file-upload-container,.file-uploads{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:1.5rem;margin-bottom:2rem}.file-upload{display:flex;flex-direction:column;gap:.5rem}.file-upload label{font-weight:600;color:#4a5568;font-size:.95rem}.file-upload input[type=file]{padding:.75rem;border:2px dashed #cbd5e0;border-radius:8px;background-color:#f7fafc;cursor:pointer;transition:all .2s ease}.file-upload input[type=file]:hover{border-color:#667eea;background-color:#edf2f7}.file-name{color:#38a169;font-weight:500;font-size:.9rem}.file-info{display:flex;flex-direction:column;gap:.25rem}.validation-status{font-size:.8rem;font-weight:500;padding:.25rem .5rem;border-radius:4px;display:inline-block}.validation-status.valid{background-color:#c6f6d5;color:#22543d;border:1px solid #9ae6b4}.validation-status.invalid{background-color:#fed7d7;color:#742a2a;border:1px solid #feb2b2}.action-buttons{display:flex;gap:1rem;flex-wrap:wrap}.process-btn,.clear-btn,.download-btn{padding:.75rem 1.5rem;border:none;border-radius:8px;font-weight:600;cursor:pointer;transition:all .2s ease;font-size:.95rem}.process-btn{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff}.process-btn:hover:not(:disabled){transform:translateY(-2px);box-shadow:0 4px 12px #667eea66}.process-btn:disabled{background:#cbd5e0;cursor:not-allowed;transform:none}.clear-btn{background:#e53e3e;color:#fff}.clear-btn:hover{background:#c53030;transform:translateY(-2px)}.download-btn{background:#38a169;color:#fff}.download-btn:hover{background:#2f855a;transform:translateY(-2px)}.errors-section{background:#fed7d7;border:1px solid #feb2b2;border-radius:8px;padding:1rem;margin-bottom:2rem}.errors-section h3{color:#c53030;margin-bottom:.5rem}.error-item{color:#742a2a;margin-bottom:.25rem}.columns-section{background:#fff;border-radius:12px;padding:2rem;margin-bottom:2rem;box-shadow:0 4px 6px #0000000d}.columns-section h3{color:#2d3748;margin-bottom:1.5rem;font-size:1.3rem;font-weight:600}.columns-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:2rem}.columns-grid h4{color:#4a5568;margin-bottom:.75rem;font-size:1.1rem;font-weight:600}.columns-grid ul{list-style:none}.columns-grid li{padding:.5rem 0;border-bottom:1px solid #e2e8f0;color:#718096;font-size:.9rem}.columns-grid li:last-child{border-bottom:none}.results-section{background:#fff;border-radius:12px;padding:2rem;box-shadow:0 4px 6px #0000000d}.results-section h3{color:#2d3748;margin-bottom:1.5rem;font-size:1.3rem;font-weight:600}.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:1rem;margin-bottom:2rem;padding:1rem;background:#f7fafc;border-radius:8px}.stats p{text-align:center;font-weight:600;color:#4a5568}.download-buttons{display:flex;gap:1rem;margin-bottom:2rem;flex-wrap:wrap}.data-preview{margin-top:2rem}.data-preview h4{color:#2d3748;margin-bottom:1rem;font-size:1.1rem;font-weight:600}.table-container{overflow-x:auto;border-radius:8px;border:1px solid #e2e8f0}table{width:100%;border-collapse:collapse;font-size:.85rem}th{background:#f7fafc;padding:.75rem;text-align:left;font-weight:600;color:#2d3748;border-bottom:2px solid #e2e8f0;white-space:nowrap}td{padding:.75rem;border-bottom:1px solid #e2e8f0;color:#4a5568;max-width:200px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}tr:hover{background-color:#f7fafc}@media (max-width: 768px){.App-main{padding:1rem}.upload-section,.columns-section,.results-section{padding:1.5rem}.file-upload-container{grid-template-columns:1fr}.action-buttons,.download-buttons{flex-direction:column}.columns-grid,.stats{grid-template-columns:1fr}.App-header h1{font-size:2rem}}