{% if site.twitter %}
<meta name="twitter:card" content="summary">
<meta name="twitter:site" content="@{{site.twitter_username}}">
<meta name="twitter:creator" content="@{{site.twitter_username}}">
{% if page.title %}<meta name="twitter:title" content="{{ page.title }}">
{% else %}<meta name="twitter:title" content="{{ site.title }}">
{% endif %}{% if page.url %}<meta name="twitter:url" content="{{ site.url }}{{ page.url }}">
{% endif %}{% if page.description %}<meta name="twitter:description" content="{{ p