{{- $signal := partial "signal.html" .RelPermalink -}}
<header class="masthead column rise">
  <p class="masthead__title"><a href="{{ "/" | relURL }}">{{ site.Title }}</a></p>
  {{- if and .IsHome site.Params.profile }}
    <a class="masthead__about" href="#about">About</a>
  {{- end }}
  <div
    class="masthead__signal"
    aria-hidden="true"
    title="sha256 of this page's URL, drawn — {{ $signal.hash }}"
  >
    <svg viewBox="0 0 1000 100" preserveAspectRatio="none" focusable="false">
      <defs>
        <linearGradient id="signal-ramp" x1="0" y1="0" x2="1" y2="0">
          <stop class="signal-ramp__lead" offset="0" />
          <stop class="signal-ramp__body" offset="0.24" />
          <stop class="signal-ramp__tail" offset="1" />
        </linearGradient>
      </defs>
      <path d="{{ $signal.path }}" pathLength="100" />
    </svg>
  </div>
</header>