:root {
    --primary-color: #2196F3;
    --error-color: #f44336;
    --success-color: #4CAF50;
    --background-color: #f5f5f5;
    --border-color: #ddd;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    background-color: var(--background-color);
    color: #333;
}

.container {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 1rem;
}

h1 {
    text-align: center;
    margin-bottom: 2rem;
    color: var(--primary-color);
}

.input-section {
    background: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    margin-bottom: 2rem;
}

.file-upload {
    margin-bottom: 2rem;
}

.required-fields {
    margin-bottom: 2rem;
}

.form-group {
    margin-bottom: 1rem;
}

label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

input[type="file"],
input[type="text"],
input[type="email"],
input[type="password"] {
    width: 100%;
    padding: 0.5rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 1rem;
}

.actions {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
}

button {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 4px;
    font-size: 1rem;
    cursor: pointer;
    transition: background-color 0.2s;
}

button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

#transformBtn {
    background-color: var(--primary-color);
    color: white;
}

#downloadBtn {
    background-color: var(--success-color);
    color: white;
}

#downloadErrorsBtn {
    background-color: var(--error-color);
    color: white;
}

.error-section {
    background: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.error-log {
    max-height: 300px;
    overflow-y: auto;
    padding: 1rem;
    background: #f8f8f8;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-family: monospace;
}

/* Preview container styles */
#previewContainer {
    background: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    margin-bottom: 2rem;
}

.table-wrapper {
    width: 100%;
    overflow-x: auto;
    margin-bottom: 1rem;
    -webkit-overflow-scrolling: touch;
}

/* Preview table styles */
.preview-table {
    width: 100%;
    min-width: 800px;  /* Ensures table doesn't collapse too narrow */
    border-collapse: separate;
    border-spacing: 0;
    margin: 0;
}

.preview-table thead {
    background-color: #f8f9fa;
    position: sticky;
    top: 0;
    z-index: 1;
}

.preview-table th {
    padding: 12px;
    text-align: left;
    border-bottom: 2px solid #dee2e6;
    font-weight: 600;
    color: #495057;
    white-space: nowrap;
    background-color: #f8f9fa;  /* Ensures background shows during scroll */
}

.preview-table td {
    padding: 10px 12px;
    border-bottom: 1px solid #dee2e6;
    color: #212529;
    max-width: 300px;  /* Prevents cells from becoming too wide */
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.preview-table tbody tr:nth-child(even) {
    background-color: #f8f9fa;
}

.preview-table tbody tr:hover {
    background-color: #f2f2f2;
}

/* Progress bar styles */
.progress-container {
    width: 100%;
    height: 20px;
    background-color: #f0f0f0;
    border-radius: 10px;
    margin: 20px 0;
    overflow: hidden;
}

.progress-bar {
    width: 0;
    height: 100%;
    background-color: #007bff;
    transition: width 0.3s ease;
}

/* Template and Mapping Styles */
.template-section {
    margin: 20px 0;
    background-color: #ffffff;
}

.template-select {
    width: 100%;
    padding: 0.5rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 1rem;
}

.mapping-container {
    margin: 20px 0;
    padding: 0;
    background-color: #ffffff;
    border: 1px solid #e0e0e0;
    border-radius: 4px;
}

.mapping-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin-bottom: 2rem;
}

.mapping-column {
    background: #f8f9fa;
    padding: 1rem;
    border-radius: 4px;
    border: 1px solid var(--border-color);
}

.mapping-column h3 {
    margin-bottom: 1rem;
    color: var(--primary-color);
    font-size: 1.1rem;
}

.source-fields ul {
    list-style: none;
    padding: 0;
}

.source-field {
    padding: 0.5rem;
    margin: 0.25rem 0;
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    cursor: move;
    transition: background-color 0.2s;
}

.source-field:hover {
    background: #e9ecef;
}

.mapping-field {
    margin-bottom: 1.5rem;
    padding: 1.25rem;
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

.mapping-field-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.mapping-field label {
    font-weight: 500;
    color: #333;
    flex: 1;
}

.transform-options {
    margin-top: 0.75rem;
}

.name-split-options {
    background: var(--background-color);
    border-radius: 6px;
    padding: 0.75rem;
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    align-items: center;
}

.split-checkbox-container {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.name-split-checkbox {
    margin: 0;
    width: 16px;
    height: 16px;
}

.name-split-checkbox:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.help-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--primary-color);
    color: white;
    font-size: 14px;
    cursor: help;
}

.help-icon.small {
    width: 16px;
    height: 16px;
    font-size: 12px;
    background: #666;
}

.component-container {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.component-label {
    font-size: 0.9rem;
    color: #666;
    white-space: nowrap;
}

.name-component-select {
    padding: 0.25rem 0.5rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background: white;
    font-size: 0.9rem;
    min-width: 120px;
}

.name-component-select:disabled {
    background: #f5f5f5;
    cursor: not-allowed;
    opacity: 0.7;
}

.validation-message {
    font-size: 0.85rem;
    margin-top: 0.5rem;
    color: #666;
}

.validation-message.error {
    color: var(--error-color);
}

.field-mapping,
.split-rule {
    width: 100%;
    padding: 0.5rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 0.9rem;
}

.mapping-preview {
    background: #f8f9fa;
    padding: 1rem;
    border-radius: 4px;
    border: 1px solid var(--border-color);
}

.mapping-preview h3 {
    margin-bottom: 1rem;
    color: var(--primary-color);
    font-size: 1.1rem;
}

.preview-mapping pre {
    background: white;
    padding: 1rem;
    border-radius: 4px;
    overflow-x: auto;
    font-size: 0.9rem;
    line-height: 1.4;
}

.preview-error {
    color: var(--error-color);
    padding: 1rem;
    background: #fff5f5;
    border: 1px solid var(--error-color);
    border-radius: 4px;
}

.template-name-field {
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 1px solid #e0e0e0;
}

.template-name-input {
    width: 100%;
    padding: 8px;
    border: 1px solid #ccc;
    border-radius: 4px;
    font-size: 14px;
}

.template-name-input:focus {
    border-color: #007bff;
    outline: none;
    box-shadow: 0 0 0 2px rgba(0,123,255,0.25);
}

/* Collapsible Mapping Panel */
.mapping-toggle {
    width: 100%;
    padding: 10px 15px;
    background-color: #f5f5f5;
    border: none;
    border-bottom: 1px solid #e0e0e0;
    text-align: left;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
}

.mapping-toggle:hover {
    background: #f8f9fa;
    border-color: var(--primary-color);
}

.mapping-toggle-icon {
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.3s ease;
    color: #495057;
}

.mapping-toggle-text {
    color: #495057;
    font-weight: 500;
}

.mapping-toggle-icon.expanded {
    transform: rotate(90deg);
}

.mapping-panel {
    width: 100%;
    padding: 15px;
    display: none;
}

.mapping-panel.expanded {
    display: block;
    opacity: 1;
    transform: translateY(0);
}

/* Format Detection Message */
.format-detection-message {
    margin: 0.5rem 0;
}

.format-detection-message .alert {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    margin: 0;
    border-radius: 4px;
    font-size: 0.9rem;
}

.format-detection-message .alert-success {
    background-color: #d4edda;
    border-color: #c3e6cb;
    color: #155724;
}

.format-detection-message .fas {
    color: #28a745;
}

.detection-info {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.detection-icon {
    background: #4caf50;
    color: white;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
}

.detection-text {
    flex: 1;
}

.confidence-bar {
    margin-top: 0.5rem;
    height: 4px;
    background: #e0e0e0;
    border-radius: 2px;
    overflow: hidden;
}

.confidence-level {
    height: 100%;
    background: #4caf50;
    transition: width 0.3s ease-in-out;
}

.confidence-text {
    display: block;
    margin-top: 0.25rem;
    font-size: 0.85rem;
    color: #4caf50;
}

/* Preview Panels */
.preview-section {
    margin: 20px 0;
}

.preview-container {
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    margin-bottom: 1rem;
    overflow: hidden;
}

.preview-toggle {
    width: 100%;
    padding: 1rem;
    background: white;
    border: none;
    border-bottom: 1px solid var(--border-color);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 500;
}

.preview-toggle:hover {
    background-color: var(--background-color);
}

.preview-toggle-icon {
    width: 20px;
    height: 20px;
    position: relative;
    transition: transform 0.3s ease;
}

.preview-toggle-icon::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 10px;
    height: 10px;
    border-right: 2px solid #666;
    border-bottom: 2px solid #666;
    transform: translate(-75%, -50%) rotate(-45deg);
}

.preview-toggle-icon.expanded::before {
    transform: translate(-75%, -75%) rotate(45deg);
}

.preview-panel {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease-out;
    background: white;
}

.preview-panel.expanded {
    max-height: 500px;
    overflow: auto;
    padding: 1rem;
}

.preview-panel table {
    min-width: 100%;
    width: max-content;
    border-collapse: collapse;
    margin: 0;
    font-size: 0.9rem;
}

.preview-panel thead {
    position: sticky;
    top: 0;
    z-index: 1;
    background: var(--background-color);
}

.preview-panel th {
    white-space: nowrap;
    background-color: var(--background-color);
    font-weight: 500;
    border: 1px solid var(--border-color);
    padding: 0.75rem;
    text-align: left;
}

.preview-panel td {
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    text-align: left;
}

.preview-panel tr:nth-child(even) {
    background-color: #fafafa;
}

.preview-message {
    margin-top: 1rem;
    color: #666;
    font-size: 0.9rem;
    text-align: right;
}