feat(component): RoadmapCarousel — snap-scrolling horizontal strip

Replaces the 3-column grid on /pulse with a CSS scroll-snap carousel.
3 cards per view on desktop (flex 0 0 calc((100% - 2px) / 3)), one full
card with a slice of the next at 88% on mobile.

Header row: serif 22px 'On the roadmap' title on the left; right side has
the 'See the full roadmap →' section link plus two 30px round arrow
buttons. Arrows disable (opacity 0.25) when at start/end of scroll. Hidden
on mobile — touch swipe is the affordance.

Carousel-scroll has 0.5px top + bottom borders in rgba(0,0,0,0.08).
Scrollbar hidden cross-browser. Each card has a 0.5px right border (last
card excluded), 24/26 padding, background --background so it sits on the
cream rather than introducing a white surface.

Card contents:
  - 6px status dot in the status colour + tracked 10px label
    '{STATUS_LABEL} · {TARGET}' in the same family colour. The
    considering tier uses the lighter #d4d2c8 dot with the #b4b2a9 label
    to distinguish it from exploring.
  - 19px serif title, line-height 1.2.
  - 12px description, line-height 1.55, --on-surface-variant. If the
    item has attributions, an attributionLine() trailer appends 'Shaped
    by Lars.' / 'Shaped by Lars and Anna.' / etc. in --on-surface-muted.

Right-edge fade gradient (80px) fades to opacity 0 at scrollEnd via a
small vanilla script. The script also handles arrow disabled state and
scrollBy ±cardWidth on click. No library.

Items are loaded with the full set ordered by display_order ASC (then
id ASC tiebreak) — admin orders chronologically nearest-to-furthest and
the carousel just consumes that.

If items.length < 4 the arrows + fade are hidden; the cards still flex
naturally and don't actually need to scroll.

/pulse: dropped the old .roadmap-section/.roadmap-grid/.roadmap-card +
status-dot/breathe styles. Carousel does its own.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/components/RoadmapCarousel.astro

@@ -0,0 +1,260 @@
+---
+import type { RoadmapItemWithAttribution, RoadmapStatus } from '../lib/db';
+
+interface Props {
+  items: RoadmapItemWithAttribution[];
+}
+
+const { items } = Astro.props;
+
+const STATUS_LABEL: Record<RoadmapStatus, string> = {
+  shipping:    'SHIPPING',
+  in_beta:     'IN BETA',
+  exploring:   'EXPLORING',
+  considering: 'CONSIDERING',
+};
+
+const STATUS_LABEL_COLOR: Record<RoadmapStatus, string> = {
+  shipping:    'var(--pigment-copper)',
+  in_beta:     'var(--pigment-terracotta)',
+  exploring:   '#b4b2a9',
+  considering: '#b4b2a9',
+};
+
+const STATUS_DOT_COLOR: Record<RoadmapStatus, string> = {
+  shipping:    'var(--pigment-copper)',
+  in_beta:     'var(--pigment-terracotta)',
+  exploring:   '#b4b2a9',
+  considering: '#d4d2c8',
+};
+
+/** First-names-only attribution string. Empty when no attribution exists. */
+function attributionLine(attributed: { name: string }[]): string {
+  if (!attributed.length) return '';
+  const names = attributed.map(a => a.name.split(' ')[0]);
+  if (names.length === 1) return `Shaped by ${names[0]}.`;
+  if (names.length === 2) return `Shaped by ${names[0]} and ${names[1]}.`;
+  return `Shaped by ${names.slice(0, -1).join(', ')} and ${names.at(-1)}.`;
+}
+
+const hasArrows = items.length > 3;
+---
+<section class="roadmap-section" aria-label="On the roadmap">
+  <header class="roadmap-header">
+    <h2 class="roadmap-title">On the roadmap</h2>
+    <div class="roadmap-actions">
+      <a href="/roadmap" class="roadmap-all">See the full roadmap →</a>
+      {hasArrows && (
+        <div class="roadmap-arrows" role="group" aria-label="Scroll controls">
+          <button type="button" class="roadmap-arrow" data-dir="prev" aria-label="Previous" disabled>
+            <svg width="14" height="14" viewBox="0 0 14 14" aria-hidden="true">
+              <path d="M9 2 L4 7 L9 12" fill="none" stroke="currentColor" stroke-width="1.4" stroke-linecap="round" stroke-linejoin="round"/>
+            </svg>
+          </button>
+          <button type="button" class="roadmap-arrow" data-dir="next" aria-label="Next">
+            <svg width="14" height="14" viewBox="0 0 14 14" aria-hidden="true">
+              <path d="M5 2 L10 7 L5 12" fill="none" stroke="currentColor" stroke-width="1.4" stroke-linecap="round" stroke-linejoin="round"/>
+            </svg>
+          </button>
+        </div>
+      )}
+    </div>
+  </header>
+
+  <div class="carousel-wrap">
+    <div class="carousel-scroll" data-carousel-scroll>
+      <div class="carousel-strip">
+        {items.map(item => (
+          <article class="carousel-card">
+            <header class="card-status">
+              <span class="card-dot" style={`background:${STATUS_DOT_COLOR[item.status]}`} aria-hidden="true"></span>
+              <span class="card-status-label" style={`color:${STATUS_LABEL_COLOR[item.status]}`}>
+                {STATUS_LABEL[item.status]}{item.target ? ` · ${item.target.toUpperCase()}` : ''}
+              </span>
+            </header>
+            <h3 class="card-title">{item.title}</h3>
+            <p class="card-desc">
+              {item.description}
+              {item.attributed.length > 0 && (
+                <span class="card-attribution"> {attributionLine(item.attributed)}</span>
+              )}
+            </p>
+          </article>
+        ))}
+      </div>
+    </div>
+    {hasArrows && <div class="carousel-fade-right" data-carousel-fade></div>}
+  </div>
+</section>
+
+<script>
+  // Vanilla carousel — scroll by card width, update arrow disabled state,
+  // fade the right gradient when scrolled to the end.
+  document.querySelectorAll<HTMLElement>('.roadmap-section').forEach((section) => {
+    const scroll = section.querySelector<HTMLElement>('[data-carousel-scroll]');
+    const fade = section.querySelector<HTMLElement>('[data-carousel-fade]');
+    if (!scroll) return;
+    const prev = section.querySelector<HTMLButtonElement>('.roadmap-arrow[data-dir="prev"]');
+    const next = section.querySelector<HTMLButtonElement>('.roadmap-arrow[data-dir="next"]');
+
+    function cardWidth() {
+      const card = scroll!.querySelector<HTMLElement>('.carousel-card');
+      return card ? card.getBoundingClientRect().width : scroll!.clientWidth;
+    }
+
+    function update() {
+      const max = scroll!.scrollWidth - scroll!.clientWidth;
+      const atStart = scroll!.scrollLeft <= 1;
+      const atEnd = scroll!.scrollLeft >= max - 1;
+      if (prev) prev.disabled = atStart;
+      if (next) next.disabled = atEnd;
+      if (fade) fade.style.opacity = atEnd ? '0' : '1';
+    }
+
+    prev?.addEventListener('click', () => scroll.scrollBy({ left: -cardWidth(), behavior: 'smooth' }));
+    next?.addEventListener('click', () => scroll.scrollBy({ left:  cardWidth(), behavior: 'smooth' }));
+    scroll.addEventListener('scroll', update, { passive: true });
+    update();
+  });
+</script>
+
+<style>
+  .roadmap-section {
+    display: flex;
+    flex-direction: column;
+    gap: 24px;
+  }
+
+  .roadmap-header {
+    display: flex;
+    justify-content: space-between;
+    align-items: baseline;
+  }
+  .roadmap-title {
+    font-family: var(--font-serif);
+    font-weight: 400;
+    font-size: 22px;
+    line-height: 1.2;
+    color: var(--on-surface);
+    margin: 0;
+  }
+  .roadmap-actions {
+    display: flex;
+    align-items: baseline;
+    gap: 18px;
+  }
+  .roadmap-all {
+    font-family: var(--font-sans);
+    font-size: 11px;
+    letter-spacing: var(--tracking-wider);
+    text-transform: uppercase;
+    color: var(--pigment-terracotta);
+    text-decoration: none;
+    border-bottom: none;
+  }
+  .roadmap-all:hover { opacity: 0.8; border-bottom: none; }
+
+  .roadmap-arrows {
+    display: flex;
+    gap: 8px;
+    align-self: center;
+  }
+  .roadmap-arrow {
+    width: 30px;
+    height: 30px;
+    border-radius: 50%;
+    border: 0.5px solid rgba(0, 0, 0, 0.15);
+    background: var(--background);
+    color: var(--on-surface);
+    display: inline-flex;
+    align-items: center;
+    justify-content: center;
+    cursor: pointer;
+    padding: 0;
+    transition: opacity var(--duration-fast) var(--ease-standard),
+                background var(--duration-fast) var(--ease-standard);
+  }
+  .roadmap-arrow:hover:not(:disabled) { background: var(--surface-container-low); }
+  .roadmap-arrow:disabled { opacity: 0.25; cursor: default; }
+
+  .carousel-wrap { position: relative; }
+
+  .carousel-scroll {
+    overflow-x: auto;
+    scroll-snap-type: x mandatory;
+    scroll-behavior: smooth;
+    scrollbar-width: none;
+    border-top: 0.5px solid rgba(0, 0, 0, 0.08);
+    border-bottom: 0.5px solid rgba(0, 0, 0, 0.08);
+  }
+  .carousel-scroll::-webkit-scrollbar { display: none; }
+
+  .carousel-strip {
+    display: flex;
+  }
+  .carousel-card {
+    flex: 0 0 calc((100% - 2px) / 3);
+    scroll-snap-align: start;
+    background: var(--background);
+    padding: 24px 26px;
+    box-sizing: border-box;
+    border-right: 0.5px solid rgba(0, 0, 0, 0.08);
+    display: flex;
+    flex-direction: column;
+    gap: 12px;
+    min-height: 168px;
+  }
+  .carousel-card:last-child { border-right: none; }
+
+  .carousel-fade-right {
+    position: absolute;
+    right: 0; top: 0; bottom: 0;
+    width: 80px;
+    background: linear-gradient(to right, transparent, var(--background));
+    pointer-events: none;
+    transition: opacity 0.2s ease;
+  }
+
+  /* Card contents */
+  .card-status {
+    display: flex;
+    align-items: center;
+    gap: 8px;
+  }
+  .card-dot {
+    width: 6px;
+    height: 6px;
+    border-radius: 50%;
+    flex-shrink: 0;
+  }
+  .card-status-label {
+    font-family: var(--font-sans);
+    font-size: 10px;
+    letter-spacing: var(--tracking-wider);
+    font-weight: 600;
+  }
+  .card-title {
+    font-family: var(--font-serif);
+    font-weight: 400;
+    font-size: 19px;
+    line-height: 1.2;
+    color: var(--on-surface);
+    margin: 0;
+  }
+  .card-desc {
+    font-size: 12px;
+    line-height: 1.55;
+    color: var(--on-surface-variant);
+    margin: 0;
+  }
+  .card-attribution {
+    color: var(--on-surface-muted);
+  }
+
+  /* Mobile: one card per view */
+  @media (max-width: 768px) {
+    .carousel-card { flex: 0 0 88%; }
+    .roadmap-arrows { display: none; }
+    .carousel-fade-right { display: none; }
+  }
+</style>

src/pages/pulse.astro

@@ -2,6 +2,7 @@
 import AppLayout from '../layouts/AppLayout.astro';
 import Avatar from '../components/Avatar.astro';
 import EventHeroCard from '../components/EventHeroCard.astro';
+import RoadmapCarousel from '../components/RoadmapCarousel.astro';
 import {
   getUpcomingEvents, getEventBySlug, getEventAttendees,
   getUserRsvp, setEventRsvp, recordActivity,
@@ -98,28 +99,9 @@ function closeDayLabel(closesAt: string): string {
   }).format(parseUtc(closesAt));
 }
 
-// ── Roadmap preview (3 most-recently-updated, horizontal) ──────────
+// ── Roadmap (all items, admin orders chronologically near→far) ─────
-const roadmapPreview = getAllRoadmapItems()
+const roadmapItems = getAllRoadmapItems()
-  .sort((a, b) => (b.updated_at > a.updated_at ? 1 : -1))
+  .sort((a, b) => a.display_order - b.display_order || a.id - b.id);
-  .slice(0, 3);
-
-function roadmapStatusDot(status: 'shipping' | 'in_beta' | 'exploring' | 'considering'): string {
-  return ({
-    shipping:    'var(--pigment-copper)',
-    in_beta:     'var(--pigment-terracotta)',
-    exploring:   '#b4b2a9',
-    considering: '#d4d2c8',
-  })[status];
-}
-function roadmapStatusBlurb(item: { status: 'shipping' | 'in_beta' | 'exploring' | 'considering'; target: string | null }): string {
-  const target = item.target ? ` · ${item.target}` : '';
-  switch (item.status) {
-    case 'shipping':    return `Shipping${target}`;
-    case 'in_beta':     return `In beta${target}`;
-    case 'exploring':   return `Exploring${target}`;
-    case 'considering': return `Considering${target}`;
-  }
-}
 
 // ── Council ─────────────────────────────────────────────────────────
 const members = getAllCabMembers();
@@ -243,26 +225,11 @@ const members = getAllCabMembers();
       </section>
     )}
 
-    <!-- ── Roadmap — horizontal cards ───────────────────────────── -->
+    <!-- ── Roadmap — horizontal snap-scrolling carousel ─────────── -->
-    {roadmapPreview.length > 0 && (
+    {roadmapItems.length > 0 && (
-      <section class="cascade roadmap-section" aria-label="From the roadmap">
+      <div class="cascade">
-        <ul class="roadmap-grid">
+        <RoadmapCarousel items={roadmapItems} />
-          {roadmapPreview.map(item => (
-            <li class="roadmap-card">
-              <span
-                class:list={['status-dot', { breathing: item.status === 'shipping' }]}
-                style={`background:${roadmapStatusDot(item.status)}`}
-                aria-hidden="true"
-              ></span>
-              <div class="roadmap-card-text">
-                <h3 class="roadmap-card-title">{item.title}</h3>
-                <p class="roadmap-card-blurb">{roadmapStatusBlurb(item)}</p>
       </div>
-            </li>
-          ))}
-        </ul>
-        <a href="/roadmap" class="section-link">See the full roadmap</a>
-      </section>
     )}
 
     <!-- ── Council members — single background, no per-member boxes - -->
@@ -636,59 +603,6 @@ const members = getAllCabMembers();
   .pulse-option.chosen .pulse-option-letter { color: var(--pigment-terracotta); }
   .pulse-option-text { flex: 1; }
 
-  /* ── Roadmap horizontal cards ─────────────────────────────────── */
-  .roadmap-section {
-    display: flex;
-    flex-direction: column;
-    gap: var(--space-5);
-  }
-  .roadmap-grid {
-    list-style: none;
-    padding: 0;
-    margin: 0;
-    display: grid;
-    grid-template-columns: repeat(3, 1fr);
-    gap: var(--space-5);
-  }
-  .roadmap-card {
-    background: var(--surface-card);
-    border: 0.5px solid var(--surface-card-border);
-    border-radius: var(--radius-md);
-    padding: var(--space-6);
-    display: flex;
-    flex-direction: column;
-    gap: var(--space-3);
-    min-height: 140px;
-  }
-  .status-dot {
-    width: 10px;
-    height: 10px;
-    border-radius: 50%;
-    flex-shrink: 0;
-  }
-  @keyframes breathe {
-    0%, 100% { transform: scale(1);   opacity: 1;   }
-    50%      { transform: scale(1.4); opacity: 0.5; }
-  }
-  .status-dot.breathing { animation: breathe 2.4s ease-in-out infinite; }
-  .roadmap-card-text { display: flex; flex-direction: column; gap: var(--space-1); }
-  .roadmap-card-title {
-    font-family: var(--font-serif);
-    font-weight: 400;
-    font-size: 1.0625rem;
-    line-height: 1.3;
-    color: var(--on-surface);
-    margin: 0;
-  }
-  .roadmap-card-blurb {
-    color: var(--on-surface-muted);
-    font-family: var(--font-sans);
-    font-size: var(--text-label-sm);
-    letter-spacing: var(--tracking-wide);
-    text-transform: uppercase;
-    margin: 0;
-  }
-
   /* ── Council — one outer surface, no per-member boxes ─────────── */
   .council-section {
     background: var(--surface-card);
@@ -740,7 +654,6 @@ const members = getAllCabMembers();
 
   /* ── Responsive ───────────────────────────────────────────────── */
   @media (max-width: 880px) {
-    .roadmap-grid { grid-template-columns: 1fr; }
     .editorial-row { grid-template-columns: 1fr; gap: var(--space-8); }
     .also-coming-up { flex-direction: column; align-items: flex-start; gap: var(--space-3); }
   }