ShrinkVertically/Template/layout/variable.php

<style type="text/css">
    :root {
        --sv-shrink-offset: <?= (int) $this->app->config('shrink_vertically_offset', 240) ?>px;
        --sv-bar-size: <?= (int) $this->app->config('shrink_vertically_bar_size', 25) ?>px;
    }
<?php if ((int) $this->app->config('shrink_vertically_column_gap', 1) === 1): ?>
    #board { border-collapse: separate !important; border-spacing: var(--sv-bar-size, 25px) 0 !important; }
<?php endif ?>
</style>