{#- chirp-ui: ASCII Divider
    Glyph-centered horizontal separator using box-drawing characters.

    Usage:
        from "chirpui/ascii_divider.html" import ascii_divider

        ascii_divider()                        {# ──────────────────── #}
        ascii_divider(glyph="✦")               {# ──────── ✦ ──────── #}
        ascii_divider(glyph="◇", variant="double")  {# ════════ ◇ ════════ #}
        ascii_divider(glyph="★", variant="heavy")   {# ━━━━━━━━ ★ ━━━━━━━━ #}

    Variants: single (default), double, heavy, dots
-#}

{% def ascii_divider(glyph="", variant="", cls="") %}
{% set variant = variant | validate_variant(("", "single", "double", "heavy", "dots"), "") %}
{% set variant_class = " chirpui-ascii-divider--" ~ variant if variant else "" %}
<div class="chirpui-ascii-divider{{ variant_class }}{{ " " ~ cls if cls else "" }}"
     role="separator"
     {% if glyph %}aria-label="{{ glyph }}"{% end %}>
    {% if glyph %}
    <span class="chirpui-ascii-divider__glyph" aria-hidden="true">{{ glyph }}</span>
    {% end %}
</div>
{% end %}