.disclaimer{color:#666;font-size:1.1rem;text-align:left;margin:0;font-weight:500}:root{--primary-color: rgb(37, 37, 37);--secondary-color: #b5b5b5;--background-color: #f8f9fa;--border-color: #dee2e6;--text-color: #212529;--shadow: 0 2px 4px rgba(0, 0, 0, .1)}body{margin:0;padding:40px;font-family:Segoe UI,system-ui,-apple-system,sans-serif;background-color:var(--background-color);color:var(--text-color);line-height:1.5}h1{font-size:2.5rem;font-weight:600;margin-bottom:2rem;color:var(--primary-color)}section{background:#fff;border-radius:6px;box-shadow:var(--shadow);padding:2rem;margin-bottom:2rem;border:1px solid var(--border-color)}section h2{font-size:1.5rem;color:var(--primary-color);margin-top:0;margin-bottom:1.5rem}h3{font-size:1rem;margin-left:0;margin-bottom:2rem;font-weight:400}h4{font-size:1.2rem;margin:0 0 20px}input[type=file]{padding:10px;border:2px dashed var(--border-color);border-radius:6px;width:100%;max-width:380px;cursor:pointer}button{background-color:var(--primary-color);color:#fff;border:none;padding:10px 20px;border-radius:6px;cursor:pointer;font-weight:500;transition:background-color .2s}button:hover{background-color:var(--secondary-color)}button:disabled{background-color:var(--border-color);cursor:not-allowed}select{padding:8px;border:1px solid var(--border-color);border-radius:6px;margin:.5rem 0;width:100%;max-width:400px}#mappingOptions{background-color:#fff;padding:1.5rem;border-radius:6px;border:1px solid var(--border-color);margin-top:1.5rem}label{display:block;margin-bottom:.5rem;font-weight:500}.button-group{display:flex;gap:10px;margin-top:1rem}.tab-buttons{display:flex;gap:1rem;margin-bottom:20px}.tab-button{padding:1rem 2rem;border:none;border-radius:6px;background-color:var(--border-color);color:var(--text-color);cursor:pointer;transition:all .2s}.tab-button.active{background-color:var(--primary-color);color:#fff}.upload-container{background:#fff;border-radius:6px;border:1px solid var(--border-color);padding:1.5rem;margin-bottom:1.5rem}.upload-group h3{margin-top:0;margin-bottom:1rem;font-size:1.1rem;color:var(--text-color)}.upload-item{margin-bottom:1rem}.upload-item:last-child{margin-bottom:0}.mapping-group{display:flex;flex-direction:column;gap:1rem;margin-bottom:1.5rem}.mapping-item{display:flex;flex-direction:column}.primary-button{background-color:var(--primary-color);color:#fff;padding:12px 24px;font-size:1rem;width:100%;max-width:400px}.column-example{font-size:.9rem;color:#666;margin-top:4px;padding:4px 8px;background-color:#f8f9fa;border-radius:6px;border:1px solid #dee2e6;max-width:380px}.error-message{color:red;margin-bottom:10px}