:root {
    --csv-shell-bg: #ffffff;
    --csv-shell-border: #e7ecf3;
    --csv-shell-shadow: 0 18px 46px rgba(21, 38, 72, 0.08);
    --csv-shell-radius: 18px;
    --csv-text-color: #1b2a4b;
    --csv-subtle-text: #5c6b80;
    --csv-accent: #0d6efd;
    --csv-accent-soft: rgba(13, 110, 253, 0.08);
    --csv-danger: #d93025;
    --csv-surface: #f6f8fb;
}

.csv-tool-shell {
    background: var(--csv-shell-bg);
    border-radius: var(--csv-shell-radius);
    box-shadow: var(--csv-shell-shadow);
    padding: 32px;
    margin-bottom: 36px;
    color: var(--csv-text-color);
}

.csv-tool-shell .heading-layout1,
.csv-tool-shell .new-added-form > .row > .custom-control {
    display: none;
}

.csv-tool-header {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 24px;
}

.csv-tool-header h1,
.csv-tool-header h2,
.csv-tool-header h3 {
    margin: 0;
    font-size: 28px;
    font-weight: 600;
    color: var(--csv-text-color);
}

.csv-tool-subtitle {
    margin: 0;
    color: var(--csv-subtle-text);
    font-size: 16px;
}

.csv-tool-form {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.csv-tool-editor {
    border: 1px solid var(--csv-shell-border);
    border-radius: 16px;
    background: var(--csv-surface);
    padding: 0;
    overflow: hidden;
}

.csv-tool-editor textarea {
    border: none !important;
    background: transparent !important;
    resize: vertical;
    min-height: 220px;
    padding: 20px 24px;
    font-family: "JetBrains Mono", "SFMono-Regular", Menlo, Consolas, monospace;
    font-size: 15px;
    line-height: 1.6;
    color: var(--csv-text-color);
}

.csv-tool-editor textarea:focus {
    outline: none;
    box-shadow: inset 0 0 0 2px rgba(13, 110, 253, 0.18);
}

.csv-tool-dropzone {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    background: #ffffff;
    border-bottom: 1px dashed rgba(13, 110, 253, 0.32);
    padding: 18px 24px;
    cursor: pointer;
    transition: background 0.2s ease, border-color 0.2s ease;
}

.csv-tool-dropzone:hover,
.csv-tool-dropzone:focus {
    background: rgba(13, 110, 253, 0.05);
    outline: none;
}

.csv-tool-dropzone strong {
    font-weight: 600;
    color: var(--csv-text-color);
}

.csv-tool-dropzone span {
    font-size: 14px;
    color: var(--csv-subtle-text);
}

.csv-tool-dropzone input {
    display: none;
}

.csv-tool-dropzone[data-dragging="true"] {
    background: rgba(13, 110, 253, 0.12);
    border-color: var(--csv-accent);
}

.csv-tool-preview {
    border-top: 1px solid var(--csv-shell-border);
    background: #ffffff;
}

.csv-tool-preview__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 16px 24px;
}

.csv-tool-preview__header h2 {
    font-size: 16px;
    font-weight: 600;
    color: var(--csv-text-color);
    margin: 0;
}

.csv-tool-preview__header span {
    font-size: 14px;
    color: var(--csv-subtle-text);
}

.csv-tool-preview__body {
    max-height: 220px;
    overflow: auto;
}

.csv-tool-preview__body table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}

.csv-tool-preview__body th,
.csv-tool-preview__body td {
    border: 1px solid var(--csv-shell-border);
    padding: 8px 12px;
    text-align: left;
    background: #fff;
}

.csv-tool-preview__body th {
    background: rgba(13, 110, 253, 0.08);
    font-weight: 600;
}

.csv-tool-preview__body td {
    white-space: nowrap;
}

.csv-tool-preview__empty {
    padding: 20px 24px;
    color: var(--csv-subtle-text);
    font-size: 14px;
}

.csv-tool-options {
    display: flex;
    flex-wrap: wrap;
    gap: 18px;
    align-items: flex-end;
}

.csv-tool-options .form-group,
.csv-tool-options .csv-tool-output-select {
    flex: 1 1 220px;
}

.csv-tool-output-select label {
    display: block;
    font-weight: 600;
    margin-bottom: 6px;
    color: var(--csv-text-color);
}

.csv-tool-output-select select {
    width: 100%;
    border-radius: 12px;
    border: 1px solid var(--csv-shell-border);
    padding: 12px 14px;
    font-size: 15px;
    color: var(--csv-text-color);
    background: #fff;
}

.csv-tool-output-select select:focus {
    border-color: var(--csv-accent);
    box-shadow: 0 0 0 3px rgba(13, 110, 253, 0.18);
    outline: none;
}

.csv-tool-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.csv-tool-actions button,
.csv-tool-actions .btn {
    border-radius: 12px;
    padding: 12px 22px;
    font-size: 15px;
    font-weight: 600;
}

.csv-tool-output {
    border: 1px solid var(--csv-shell-border);
    border-radius: 16px;
    overflow: hidden;
    background: #fff;
}

.csv-tool-output[hidden] {
    display: none !important;
}

.csv-tool-output__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 16px 24px;
    border-bottom: 1px solid var(--csv-shell-border);
}

.csv-tool-output__header h2 {
    font-size: 16px;
    margin: 0;
    font-weight: 600;
    color: var(--csv-text-color);
}

.csv-tool-output__header button {
    border: none;
    border-radius: 999px;
    padding: 8px 16px;
    font-size: 14px;
    color: #fff;
    background: var(--csv-accent);
    cursor: pointer;
    transition: background 0.2s ease;
}

.csv-tool-output__header button:hover,
.csv-tool-output__header button:focus {
    background: #0b5ed7;
    outline: none;
}

.csv-tool-output__body {
    padding: 20px 24px;
    background: var(--csv-surface);
    max-height: 320px;
    overflow: auto;
    font-family: "JetBrains Mono", "SFMono-Regular", Menlo, Consolas, monospace;
    font-size: 14px;
    line-height: 1.6;
    color: var(--csv-text-color);
    white-space: pre-wrap;
}

.csv-tool-output[data-empty="true"] .csv-tool-output__body {
    color: var(--csv-subtle-text);
}

.csv-tool-output__empty {
    color: var(--csv-subtle-text);
    font-size: 14px;
}

.csv-tool-error {
    border-radius: 16px;
    padding: 18px 24px;
    background: rgba(217, 48, 37, 0.12);
    color: var(--csv-danger);
    font-weight: 500;
    margin: 16px 0 0;
}

.csv-tool-footer {
    margin-top: 12px;
    color: var(--csv-subtle-text);
    font-size: 14px;
}

.csv-tool-shell + .card.height-auto .card-body {
    margin-top: -12px;
}

@media (max-width: 768px) {
    .csv-tool-shell {
        padding: 24px;
    }

    .csv-tool-options {
        flex-direction: column;
        align-items: stretch;
    }

    .csv-tool-editor textarea {
        min-height: 180px;
    }
}