{% if page.css-package %}

{% capture css-package %}/assets/css/main-{{page.css-package}}.css{% endcapture %}
<link rel="stylesheet" href="{{ css-package | relative_url }}?v={% bust_cache %}">

{% elsif layout.css-package %}

{% capture css-package %}/assets/css/main-{{layout.css-package}}.css{% endcapture %}
<link rel="stylesheet" href="{{ css-package | relative_url }}?v={% bust_cache %}">

{% else %}

<link rel="stylesheet" href="{{ "/assets/css/main.css" | relative_url }}?v={% bust_cache %}">

{% endif %}