{% macro button(label, type='button', variant='primary', extra_class='', icon=None) -%}
  <button type="{{ type }}" class="btn btn--{{ variant }} {{ extra_class }}">
    {% if icon %}<span class="btn__icon" aria-hidden="true">{{ icon }}</span>{% endif %}
    <span>{{ label }}</span>
  </button>
{%- endmacro %}
{% macro link_button(label, href, variant='primary', extra_class='') -%}
  <a href="{{ href }}" class="btn btn--{{ variant }} {{ extra_class }}">{{ label }}</a>
{%- endmacro %}