:root{--toastify-color-light: #fff;--toastify-color-dark: #121212;--toastify-color-info: #3498db;--toastify-color-success: #07bc0c;--toastify-color-warning: #f1c40f;--toastify-color-error: hsl(6, 78%, 57%);--toastify-color-transparent: rgba(255, 255, 255, .7);--toastify-icon-color-info: var(--toastify-color-info);--toastify-icon-color-success: var(--toastify-color-success);--toastify-icon-color-warning: var(--toastify-color-warning);--toastify-icon-color-error: var(--toastify-color-error);--toastify-container-width: fit-content;--toastify-toast-width: 320px;--toastify-toast-offset: 16px;--toastify-toast-top: max(var(--toastify-toast-offset), env(safe-area-inset-top));--toastify-toast-right: max(var(--toastify-toast-offset), env(safe-area-inset-right));--toastify-toast-left: max(var(--toastify-toast-offset), env(safe-area-inset-left));--toastify-toast-bottom: max(var(--toastify-toast-offset), env(safe-area-inset-bottom));--toastify-toast-background: #fff;--toastify-toast-padding: 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0;position:relative;touch-action:none;width:var(--toastify-toast-width);min-height:var(--toastify-toast-min-height);box-sizing:border-box;margin-bottom:1rem;padding:var(--toastify-toast-padding);border-radius:var(--toastify-toast-bd-radius);box-shadow:var(--toastify-toast-shadow);max-height:var(--toastify-toast-max-height);font-family:var(--toastify-font-family);z-index:0;display:flex;flex:1 auto;align-items:center;word-break:break-word}@media only screen and (max-width: 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Toastify__slideOutUp{0%{transform:translate3d(0,var(--y),0)}to{visibility:hidden;transform:translate3d(0,-500px,0)}}.Toastify__slide-enter--top-left,.Toastify__slide-enter--bottom-left{animation-name:Toastify__slideInLeft}.Toastify__slide-enter--top-right,.Toastify__slide-enter--bottom-right{animation-name:Toastify__slideInRight}.Toastify__slide-enter--top-center{animation-name:Toastify__slideInDown}.Toastify__slide-enter--bottom-center{animation-name:Toastify__slideInUp}.Toastify__slide-exit--top-left,.Toastify__slide-exit--bottom-left{animation-name:Toastify__slideOutLeft;animation-timing-function:ease-in;animation-duration:.3s}.Toastify__slide-exit--top-right,.Toastify__slide-exit--bottom-right{animation-name:Toastify__slideOutRight;animation-timing-function:ease-in;animation-duration:.3s}.Toastify__slide-exit--top-center{animation-name:Toastify__slideOutUp;animation-timing-function:ease-in;animation-duration:.3s}.Toastify__slide-exit--bottom-center{animation-name:Toastify__slideOutDown;animation-timing-function:ease-in;animation-duration:.3s}@keyframes 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768px){.container{margin:1rem;padding:1.5rem}h1{font-size:1.8rem}}h1{color:var(--text-color);font-weight:600;margin-bottom:.5rem}.app-subtitle{color:#6c757d;margin-bottom:2rem;font-size:1.05rem}label{font-weight:500;margin-bottom:.3rem;display:block;color:#495057}.visually-hidden{position:absolute!important;height:1px;width:1px;overflow:hidden;clip:rect(1px,1px,1px,1px);white-space:nowrap}button,.button{background-color:var(--accent-color);color:var(--button-text-color);border:none;border-radius:6px;font-size:1rem;font-weight:500;padding:.75rem 1.5rem;cursor:pointer;transition:background-color .2s ease-in-out;text-decoration:none;display:inline-block;text-align:center}button:hover:enabled,.button:hover:enabled{background-color:var(--accent-color-dark)}button:disabled,.button:disabled{opacity:.6;cursor:not-allowed}.preview-box{margin:2rem 0;padding:1.5rem;border:1px solid var(--border-color);background:var(--card-background);border-radius:8px;overflow-x:auto}.preview-box h3{margin-top:0;color:var(--preview-title-color);font-weight:600;font-size:1.2rem;border-bottom:1px solid var(--border-color);padding-bottom:.75rem;margin-bottom:1rem}.sample-links-container{margin-bottom:1.5rem;text-align:right}.sample-links-container a{color:var(--link-color);text-decoration:none;font-weight:500;margin-left:1.5rem;display:inline-flex;align-items:center}.sample-links-container a:hover{text-decoration:underline}.sample-links-container svg{margin-right:.3rem}.file-upload-section{margin-bottom:2rem}.file-upload-title{font-size:1.3rem;font-weight:600;margin-bottom:.5rem}.file-upload-description{font-size:.95rem;color:#6c757d;margin-bottom:1rem}.drop-zone{border:2px dashed var(--dropzone-border-color);border-radius:8px;padding:2.5rem;text-align:center;background-color:var(--dropzone-background);transition:background-color .2s ease,border-color .2s 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ease-in-out}.progress-bar-text{font-size:.8rem;color:var(--accent-color);margin-top:.25rem}.dark-mode-toggle{background:none;color:var(--text-color);border:none;font-size:1.8rem;cursor:pointer;padding:.25rem;line-height:1}.csv-preview-table-container{margin-top:2rem;margin-bottom:2rem}.csv-preview-table-container h4{margin-bottom:1rem;font-weight:600;color:var(--text-color)}.csv-preview-table{width:100%;border-collapse:collapse;font-size:.85em;box-shadow:0 1px 3px #0000000a;border-radius:6px;overflow:hidden}.csv-preview-table th,.csv-preview-table td{border:1px solid var(--border-color);padding:8px 10px;text-align:left;word-break:break-word;white-space:nowrap}.csv-preview-table th{background-color:var(--dropzone-background);font-weight:500;color:var(--text-color);position:sticky;top:0;z-index:1}.csv-preview-table tbody tr:nth-child(2n){background-color:var(--dropzone-background)}.upload-step-container{margin-bottom:2rem;padding:1.5rem;border:1px solid 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