{% macro button(label, variant='primary', button_type='button') -%}
{% set class_name = 'button' %}
{% if variant != 'primary' %}
{% set class_name = class_name ~ ' button--' ~ variant %}
{% endif %}
<button class="{{ class_name }}" type="{{ button_type }}">{{ label }}</button>
{%- endmacro %}

{% macro panel(title='') -%}
<section class="panel">
  {% if title %}
  <h2>{{ title }}</h2>
  {% endif %}
  {{ caller() if caller }}
</section>
{%- endmacro %}