/* ========================================
   CLEANSHEET
   UI COMPONENTS
======================================== */


/* ========================================
   UPLOAD SECTION
======================================== */

.upload-area {
    min-height: 210px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 30px 20px;
    background: var(--color-surface);
    border: 1px dashed var(--color-border-strong);
    border-radius: var(--radius-lg);
    text-align: center;
    transition: border-color 0.2s ease, background 0.2s ease;
}

.upload-area:hover {
    border-color: var(--color-primary);
    background: #FCFCFF;
}

.upload-area.drag-over {
    border-color: var(--color-primary);
    background: var(--color-primary-light);
}

.upload-icon {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 15px;
    background: var(--color-primary-light);
    color: var(--color-primary);
    border-radius: 10px;
}

.upload-icon i {
    width: 21px;
    height: 21px;
}

.upload-area h3 {
    margin-bottom: 5px;
    font-size: 15px;
    font-weight: 600;
}

.upload-area p {
    font-size: 12px;
}

.text-button {
    color: var(--color-primary);
    background: transparent;
    font-weight: 600;
}

.text-button:hover {
    text-decoration: underline;
}

.upload-formats {
    margin-top: 15px;
    font-size: 10px;
    color: var(--color-text-muted);
}


/* ========================================
   STATISTICS CARDS
======================================== */

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 15px;
}

.stat-card {
    min-width: 0;
    padding: 19px 18px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    transition: border-color 0.2s ease;
}

.stat-card:hover {
    border-color: var(--color-border-strong);
}

.stat-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
    font-size: 12px;
    font-weight: 500;
    color: var(--color-text-secondary);
}

.stat-top i {
    width: 17px;
    height: 17px;
    color: var(--color-text-muted);
}

.stat-card strong {
    display: block;
    margin-bottom: 4px;
    font-size: 26px;
    font-weight: 600;
    line-height: 1.2;
    letter-spacing: -0.8px;
    color: var(--color-text);
}

.stat-card small {
    font-size: 10px;
    color: var(--color-text-muted);
}


/* ========================================
   DATA PREVIEW
======================================== */

.table-container {
    min-height: 235px;
    overflow: hidden;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
}

.empty-state {
    min-height: 235px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 30px 20px;
    text-align: center;
}

.empty-icon {
    width: 43px;
    height: 43px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 13px;
    color: var(--color-text-muted);
    background: #F4F5F7;
    border-radius: 9px;
}

.empty-icon i {
    width: 20px;
    height: 20px;
}

.empty-state h3 {
    margin-bottom: 5px;
    font-size: 13px;
    font-weight: 600;
}

.empty-state p {
    font-size: 11px;
    color: var(--color-text-muted);
}

.preview-count {
    padding: 5px 9px;
    background: #F5F6F8;
    border-radius: var(--radius-sm);
    font-size: 10px;
    font-weight: 500;
    color: var(--color-text-secondary);
}


/* ========================================
   DATA TABLE
======================================== */

.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 12px;
    white-space: nowrap;
}

.data-table th {
    padding: 12px 15px;
    background: #F8F9FB;
    border-bottom: 1px solid var(--color-border);
    color: var(--color-text-secondary);
    font-size: 10px;
    font-weight: 600;
    text-align: left;
}

.data-table td {
    padding: 12px 15px;
    border-bottom: 1px solid var(--color-border);
    color: var(--color-text-secondary);
}

.data-table tr:last-child td {
    border-bottom: none;
}

.data-table tbody tr:hover {
    background: #FAFBFC;
}

.data-table .missing-cell {
    color: var(--color-danger);
    background: var(--color-danger-light);
}

.table-scroll {
    width: 100%;
    overflow-x: auto;
}


/* ========================================
   GENERAL BUTTONS
======================================== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    min-height: 36px;
    padding: 0 14px;
    border-radius: var(--radius-md);
    font-size: 12px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s ease, border-color 0.2s ease, opacity 0.2s ease;
}

.btn-primary {
    color: #FFFFFF;
    background: var(--color-primary);
}

.btn-primary:hover {
    background: var(--color-primary-hover);
}

.btn-secondary {
    color: var(--color-text);
    background: var(--color-surface);
    border: 1px solid var(--color-border-strong);
}

.btn-secondary:hover {
    background: #F8F9FB;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn i {
    width: 15px;
    height: 15px;
}


/* ========================================
   STATUS LABELS
======================================== */

.status-badge {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 10px;
    font-weight: 600;
}

.status-success {
    color: var(--color-success);
    background: var(--color-success-light);
}

.status-warning {
    color: var(--color-warning);
    background: var(--color-warning-light);
}

.status-danger {
    color: var(--color-danger);
    background: var(--color-danger-light);
}


/* ========================================
   FILE INFORMATION
======================================== */

.file-info {
    display: flex;
    align-items: center;
    gap: 10px;
}

.file-icon {
    width: 34px;
    height: 34px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-primary-light);
    color: var(--color-primary);
    border-radius: 6px;
}

.file-icon i {
    width: 17px;
    height: 17px;
}

.file-details {
    display: flex;
    flex-direction: column;
}

.file-details strong {
    font-size: 12px;
    font-weight: 600;
}

.file-details span {
    font-size: 10px;
    color: var(--color-text-muted);
}


/* ========================================
   DATA CLEANING PAGE
======================================== */

.cleaning-content {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.cleaning-card {
    padding: 22px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
}

.cleaning-card-header {
    margin-bottom: 18px;
}

.cleaning-card-header h3 {
    margin-bottom: 5px;
    font-size: 15px;
    font-weight: 600;
    color: var(--color-text);
}

.cleaning-card-header p {
    font-size: 12px;
    color: var(--color-text-secondary);
}

.cleaning-section {
    padding: 20px 0;
    border-bottom: 1px solid var(--color-border);
}

.cleaning-section:first-child {
    padding-top: 0;
}

.cleaning-section:last-child {
    padding-bottom: 0;
    border-bottom: none;
}

.cleaning-section-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 15px;
    margin-bottom: 15px;
}

.cleaning-section-header h4 {
    margin-bottom: 4px;
    font-size: 13px;
    font-weight: 600;
    color: var(--color-text);
}

.cleaning-section-header p {
    font-size: 11px;
    color: var(--color-text-muted);
}

.cleaning-count {
    flex-shrink: 0;
    padding: 5px 9px;
    color: var(--color-text-secondary);
    background: #F5F6F8;
    border-radius: var(--radius-sm);
    font-size: 10px;
    font-weight: 600;
}


/* ========================================
   FORM CONTROLS
======================================== */

.form-group {
    display: flex;
    flex-direction: column;
    gap: 7px;
    margin-bottom: 14px;
}

.form-group:last-child {
    margin-bottom: 0;
}

.form-group > label {
    font-size: 11px;
    font-weight: 600;
    color: var(--color-text-secondary);
}

.form-control {
    width: 100%;
    min-height: 38px;
    padding: 0 11px;
    color: var(--color-text);
    background: var(--color-surface);
    border: 1px solid var(--color-border-strong);
    border-radius: var(--radius-md);
    outline: none;
    font-family: inherit;
    font-size: 12px;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.form-control:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(66, 99, 235, 0.10);
}

.form-control::placeholder {
    color: var(--color-text-muted);
}

select.form-control {
    cursor: pointer;
}

.form-hint {
    font-size: 10px;
    color: var(--color-text-muted);
}


/* ========================================
   MULTI-COLUMN PICKER
======================================== */

.column-picker {
    position: relative;
    width: 100%;
}


/* Dropdown trigger */

.column-picker-trigger {
    width: 100%;
    min-height: 40px;

    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;

    padding: 0 12px;

    color: var(--color-text);
    background: var(--color-surface);

    border: 1px solid var(--color-border-strong);
    border-radius: var(--radius-md);

    font-family: inherit;
    font-size: 12px;
    text-align: left;

    cursor: pointer;

    transition:
        border-color 0.2s ease,
        box-shadow 0.2s ease,
        background 0.2s ease;
}

.column-picker-trigger:hover {
    border-color: var(--color-primary);
}

.column-picker-trigger:focus-visible {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(66, 99, 235, 0.10);
}

.column-picker-label {
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.column-picker-trigger > i {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
    color: var(--color-text-muted);
    transition: transform 0.2s ease;
}

.column-picker.is-open .column-picker-trigger > i {
    transform: rotate(180deg);
}


/* Dropdown panel */

.column-picker-dropdown {
    position: absolute;
    top: calc(100% + 7px);
    left: 0;

    width: 100%;
    min-width: 240px;

    padding: 10px;

    background: var(--color-surface);

    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);

    box-shadow: 0 12px 30px rgba(20, 30, 55, 0.12);

    z-index: 50;
}

.column-picker-dropdown[hidden] {
    display: none;
}


/* Search input */

.column-picker-search {
    width: 100%;
    height: 36px;

    margin-bottom: 9px;
    padding: 0 10px;

    color: var(--color-text);
    background: #FAFBFD;

    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);

    outline: none;

    font-family: inherit;
    font-size: 11px;

    transition:
        border-color 0.2s ease,
        box-shadow 0.2s ease;
}

.column-picker-search:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(66, 99, 235, 0.08);
}

.column-picker-search::placeholder {
    color: var(--color-text-muted);
}


/* Checkbox list */

.column-picker-options {
    display: flex;
    flex-direction: column;
    gap: 2px;

    max-height: 210px;
    overflow-y: auto;

    padding-top: 5px;
}


/* Individual options */

.column-picker-option {
    min-height: 34px;

    display: flex;
    align-items: center;
    gap: 9px;

    padding: 7px 8px;

    color: var(--color-text-secondary);

    border-radius: var(--radius-sm);

    font-size: 11px;
    font-weight: 400;

    cursor: pointer;

    transition:
        background 0.15s ease,
        color 0.15s ease;
}

.column-picker-option:hover {
    color: var(--color-text);
    background: #F5F7FC;
}

.column-picker-option input {
    width: 15px;
    height: 15px;
    flex-shrink: 0;

    margin: 0;

    accent-color: var(--color-primary);

    cursor: pointer;
}

.column-picker-option span {
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}


/* Select all */

.select-all-option {
    margin-bottom: 5px;
    padding-bottom: 10px;

    color: var(--color-text);

    border-bottom: 1px solid var(--color-border);

    font-weight: 600;
}


/* Empty search result */

.column-picker-no-results {
    padding: 15px 8px;

    color: var(--color-text-muted);

    font-size: 11px;
    text-align: center;
}


/* ========================================
   CHECKBOX CONTROLS
======================================== */

.checkbox-control {
    display: flex;
    align-items: center;
    gap: 9px;
    font-size: 12px;
    color: var(--color-text-secondary);
    cursor: pointer;
}

.checkbox-control input {
    width: 15px;
    height: 15px;
    accent-color: var(--color-primary);
    cursor: pointer;
}


/* ========================================
   ACTIVE DATASET
======================================== */

.active-dataset {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 15px;
    background: #FAFBFD;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
}

.active-dataset-info {
    display: flex;
    align-items: center;
    gap: 12px;
    min-width: 0;
}

.active-dataset-details {
    display: flex;
    flex-direction: column;
    gap: 4px;
    min-width: 0;
}

.active-dataset-details strong {
    overflow: hidden;
    font-size: 12px;
    font-weight: 600;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.active-dataset-details span {
    font-size: 10px;
    color: var(--color-text-muted);
}


/* ========================================
   CLEANING ACTIONS
======================================== */

.cleaning-actions {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 18px;
}

.cleaning-actions .btn {
    min-height: 38px;
}


/* ========================================
   CLEANING PREVIEW
======================================== */

.cleaning-preview {
    overflow: hidden;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
}

.cleaning-preview-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 14px 16px;
    border-bottom: 1px solid var(--color-border);
}

.cleaning-preview-header h4 {
    font-size: 12px;
    font-weight: 600;
}

.cleaning-preview-empty {
    padding: 35px 20px;
    text-align: center;
    color: var(--color-text-muted);
    font-size: 12px;
}

.cleaning-preview-empty > i {
    width: 24px;
    height: 24px;
    margin-bottom: 12px;
}

.cleaning-preview-empty p {
    margin-bottom: 5px;
    color: var(--color-text-secondary);
    font-weight: 500;
}

.cleaning-preview-empty span {
    font-size: 11px;
}


/* ========================================
   EXPORT SECTION
======================================== */

.export-controls {
    display: flex;
    align-items: flex-end;
    gap: 12px;
}

.export-controls .form-group {
    flex: 1;
    margin-bottom: 0;
}


/* ========================================
   RESPONSIVE COMPONENTS
======================================== */

@media (max-width: 600px) {

    .stats-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .cleaning-card {
        padding: 16px;
    }

    .active-dataset {
        align-items: flex-start;
        flex-direction: column;
    }

    .cleaning-actions {
        justify-content: stretch;
    }

    .cleaning-actions .btn {
        flex: 1;
    }

    .export-controls {
        align-items: stretch;
        flex-direction: column;
    }

    .column-picker-dropdown {
        min-width: 0;
    }
}