{#
    Fixed altitude sidebar — shows the current section's altitude and a
    vertical track of star markers, with a single liquid blob that slides
    to the currently active mountain band while scrolling.
    Purely decorative (aria-hidden), driven by assets/animations/gsap/AltitudeSidebar.ts.
#}
<aside class="altitude-sidebar" data-altitude-sidebar aria-hidden="true">
    <span class="altitude-sidebar__value" data-altitude-value>2500<span class="altitude-sidebar__unit">m</span></span>
    <div class="altitude-sidebar__track" data-altitude-track>
        <span class="altitude-sidebar__blob" data-altitude-blob></span>
        <span class="altitude-sidebar__line"></span>
        {% for i in 1..3 %}
            <span class="altitude-sidebar__level" data-altitude-level>
                <svg class="altitude-sidebar__star" viewBox="0 0 12 12" aria-hidden="true">
                    <path d="M0 6C4.8 6 6 2 6 0C6 4.249 10 6 12 6C8 6 6 10 6 12C6 8 2 6 0 6Z"/>
                </svg>
            </span>
            <span class="altitude-sidebar__line"></span>
        {% endfor %}
    </div>
</aside>