{{- /* Use a featured image resource if available and otherwise a featured_image string */ -}}
{{- $featured_image := .Scratch.Get "featured_image" }}
{{- $default_image_url := "" -}}
{{- with $featured_image -}}
  {{- $default_image_url = .RelPermalink -}}
{{- else -}}
  {{- $default_image_url = .Params.featured_image -}}
{{- end -}}
{{- /* Default to the full size image */ -}}
{{- /* Trimming the slash and adding absURL make sure the image works no matter where our site lives */ -}}
{{- $default_image_url := (trim $default_image_url "/") | absURL }}
.has-header-image {
  background-image: url('{{ $default_image_url }}');
}
{{- /* Responsive background images require both a featured image resource and breakpoints */ -}}
{{- if and $featured_image .Site.Params.breakpoints -}}
  {{- $scratch := newScratch -}}
  {{- $anchor := .Params.featured_image_data.anchor | default "Top" -}}
  {{- /* Default header image height is approximately 500px */ -}}
  {{- $height := 500 -}}
  {{- /* If there's a description, the header is taller */ -}}
  {{- if .Description -}}
    {{- $height = add $height 100 -}}
  {{- end -}}
  {{- /* Provide a resized image for each breakpoint */ -}}
  {{- range $breakpoint := .Site.Params.breakpoints -}}
    {{- /* Default mobile breakpoint for Tachyons is 480 */ -}}
    {{- if and (ge $breakpoint 480) (ge $featured_image.Width $breakpoint) -}}
      {{- $breakpoint_image := $featured_image.Resize (print $breakpoint "x") -}}
      {{- $options := print $breakpoint "x" $height " " $anchor -}}
      {{- $breakpoint_image = $breakpoint_image.Crop ($options) -}}
      {{- $breakpoint_image_url := (trim $breakpoint_image.RelPermalink "/") | absURL }}
@media only screen and (max-width: {{ $breakpoint }}px) {
  .has-header-image {
    background-image: url('{{ $breakpoint_image_url }}');
  }
}
    {{- end -}}
  {{- end -}}
{{- end }}