<meta charset=“utf-8”> <meta http-equiv=“X-UA-Compatible” content=“IE=edge”> <meta name=“viewport” content=“width=device-width, initial-scale=1”>

{% seo %}

{% feed_meta %}

{% if jekyll.environment == 'production' and site.google_analytics %}

{% include google-analytics.html %}

{% endif %}

{% if page.math %}

{% include mathjax.html %}

{% endif %}

<link rel=“stylesheet” href=“{{ '/assets/css/main.css' | relative_url }}”> <link rel=“stylesheet” href=“{{ '/assets/css/skin.css' | relative_url }}”>

<!– Begin selecting skin –> {% unless site.skin %}

<script>
  const hour = (new Date()).getHours();
  let filename = "";
  if (hour >= 5 && hour < 7) {
    filename = "{{ '/assets/css/skin-sunrise.css' | relative_url }}";
  } else if (hour >= 7 && hour < 17) {
    filename = "{{ '/assets/css/skin-daylight.css' | relative_url }}";
  } else if (hour >= 17 && hour < 19) {
    filename = "{{ '/assets/css/skin-sunset.css' | relative_url }}";
  } else {
    filename = "{{ '/assets/css/skin-midnight.css' | relative_url }}";
  }
  const elem = document.createElement("link");
  elem.setAttribute("rel", "stylesheet");
  elem.setAttribute("type", "text/css");
  elem.setAttribute("href", filename);
  document.getElementsByTagName("head")[0].appendChild(elem);
</script>

{% endunless %} <!– End selecting skin –>

<script async src=“use.fontawesome.com/releases/v5.0.12/js/all.js”>>

{% include custom-head.html %}