/* The FND Challenge Chain — a neural-heart network of support. */
:root {
  --chain-navy: #002b5f;
  --chain-pink: #c9005a;
  --chain-gold: #f4b41a;
  --chain-ink: #1d2b3e;
  --chain-muted: #5a6b80;
  --chain-line: #dbe3ee;
  --chain-bg: #eef3f9;
}

.chain-page { background: var(--chain-bg); color: var(--chain-ink); }
.chain-wrap { max-width: 1100px; margin: 0 auto; padding: 0 1.1rem; }
.chain-section { padding: 2.2rem 0; }
.chain-section h2 { color: var(--chain-navy); font-size: clamp(1.4rem, 3vw, 2rem); margin: 0 0 1rem; }

/* Hero */
.chain-hero {
  background: radial-gradient(1200px 500px at 20% -10%, rgba(201,0,90,0.25), transparent 60%),
              radial-gradient(1000px 500px at 90% 0%, rgba(244,180,26,0.22), transparent 55%),
              linear-gradient(135deg, #002b5f, #06386f);
  color: #fff; padding: 3rem 0 2.6rem; position: relative; overflow: hidden;
}
.chain-landing-hero {
  padding: clamp(3.1rem, 7vw, 5rem) 0 3rem;
  background:
    linear-gradient(90deg, rgba(0,43,95,0.98) 0%, rgba(0,43,95,0.9) 43%, rgba(0,43,95,0.62) 76%, rgba(0,43,95,0.86) 100%),
    url("/assets/img/fnd-day/day-with-fnd-hero.jpg") center / cover no-repeat;
}
.chain-landing-hero .chain-wrap { position: relative; z-index: 1; }
.chain-landing-hero h1 { max-width: 17ch; font-size: clamp(2.2rem, 5.6vw, 4rem); }
/* The global stylesheet colours h1 (--ink), .lead (--muted) and .eyebrow
   (navy, !important) — all dark-on-dark inside this navy hero, so every one
   is explicitly overridden here. */
.chain-hero .eyebrow {
  text-transform: uppercase; letter-spacing: .12em; font-size: .8rem; margin: 0 0 .8rem;
  background: rgba(255,255,255,0.14); border-color: rgba(255,255,255,0.4);
  color: #fff !important;
}
.chain-hero .eyebrow a { color: inherit; text-decoration: none; }
.chain-hero h1 { font-size: clamp(1.9rem, 5vw, 3.1rem); margin: 0 0 .6rem; line-height: 1.08; color: #fff; }
.chain-hero p.lead, .chain-hero .lead { font-size: clamp(1.05rem, 2.4vw, 1.3rem); max-width: 62ch; margin: 0 0 1.4rem; color: rgba(255,255,255,0.95); }
.chain-hero p.lead strong, .chain-hero p.lead a { color: #fff; }
.chain-cta-row { display: flex; flex-wrap: wrap; gap: .7rem; }
.chain-hero-path {
  display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: .7rem;
  max-width: 820px; margin: 1.2rem 0 0;
}
.chain-hero-path span {
  position: relative; display: flex; align-items: center; gap: .55rem;
  padding: .65rem .75rem; border-radius: 12px;
  background: rgba(255,255,255,0.12); border: 1px solid rgba(255,255,255,0.22);
  color: #fff; font-weight: 800; font-size: .9rem;
}
.chain-hero-path span + span::before {
  content: ""; position: absolute; width: .7rem; height: 2px; background: var(--chain-gold);
  left: -.7rem; top: 50%; transform: translateY(-50%);
}
.chain-hero-path b {
  display: grid; place-items: center; flex: 0 0 1.8rem; width: 1.8rem; height: 1.8rem;
  border-radius: 999px; background: var(--chain-gold); color: #2a1c00;
}

.chain-btn {
  display: inline-block; border: 0; cursor: pointer; font-weight: 800; font-size: 1rem;
  padding: .8rem 1.4rem; border-radius: 999px; text-decoration: none; text-align: center;
  background: var(--chain-pink); color: #fff; transition: transform .12s ease, filter .12s ease;
}
/* The global a:hover recolours anchors navy — dark-on-dark on these buttons,
   so hover colours are pinned explicitly at higher specificity. */
.chain-btn:hover { transform: translateY(-1px); filter: brightness(1.06); color: #fff; }
.chain-btn.gold { background: var(--chain-gold); color: #2a1c00; }
.chain-btn.gold:hover { color: #2a1c00; }
.chain-btn.ghost { background: rgba(255,255,255,0.12); color: #fff; box-shadow: inset 0 0 0 1px rgba(255,255,255,0.5); }
.chain-btn.navy { background: var(--chain-navy); color: #fff; }
.chain-btn.block { display: block; width: 100%; }
.chain-btn.sm { padding: .5rem .9rem; font-size: .9rem; }

/* Stats strip */
.chain-stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(130px, 1fr)); gap: .8rem; margin: 1.4rem 0 0; }
.chain-stat { background: rgba(255,255,255,0.12); border-radius: 12px; padding: .9rem 1rem; }
.chain-stat b { display: block; font-size: 1.6rem; line-height: 1.1; }
.chain-stat span { font-size: .82rem; opacity: .9; }
.chain-stats.light .chain-stat { background: #fff; box-shadow: 0 1px 0 var(--chain-line); }
.chain-stats.light .chain-stat b { color: var(--chain-navy); }
.chain-stats.light .chain-stat span { color: var(--chain-muted); opacity: 1; }

.chain-progress { background: #dde5f0; border-radius: 999px; height: 12px; overflow: hidden; margin: .5rem 0; }
.chain-progress span { display: block; height: 100%; background: linear-gradient(90deg, var(--chain-pink), var(--chain-gold)); }

/* Panels & cards */
.chain-panel { background: #fff; border: 1px solid var(--chain-line); border-radius: 14px; padding: 1.4rem; box-shadow: 0 2px 10px rgba(0,43,95,0.05); }
.chain-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 1rem; align-items: start; }
.chain-card { background: #fff; border: 1px solid var(--chain-line); border-radius: 14px; padding: 1.1rem; display: flex; flex-direction: column; gap: .5rem; min-height: 0; }
.chain-card:hover { transform: translateY(-2px); box-shadow: 0 10px 28px rgba(0,43,95,0.12); }
.chain-card-image { width: 100%; height: 120px; object-fit: cover; border-radius: 10px; display: block; }
.chain-card .who { font-weight: 800; color: var(--chain-navy); }
.chain-card .what { color: var(--chain-ink); }
.chain-card .meta { font-size: .82rem; color: var(--chain-muted); display: flex; flex-wrap: wrap; gap: .5rem 1rem; margin-top: auto; }
.chain-card.is-donation, .chain-card.is-share {
  background:
    radial-gradient(160px 120px at 84% 16%, rgba(244,180,26,0.18), transparent 70%),
    linear-gradient(180deg, #fff, #fff7fa);
}
.chain-card-visual {
  position: relative; min-height: 136px; border-radius: 12px; overflow: hidden;
  display: grid; place-items: center; text-align: center;
  background:
    radial-gradient(circle at 50% 45%, rgba(201,0,90,0.18), transparent 42%),
    linear-gradient(145deg, #06213f, #0a3a72);
  color: #fff;
}
.chain-card-visual::before, .chain-card-visual::after {
  content: ""; position: absolute; width: 62%; height: 1px; background: rgba(147,179,217,0.42);
  left: 19%; top: 50%; transform: rotate(-18deg);
}
.chain-card-visual::after { transform: rotate(22deg); opacity: .7; }
.chain-card-visual-label {
  position: absolute; top: .7rem; left: .75rem; right: .75rem; color: rgba(255,255,255,0.78);
  font-size: .72rem; font-weight: 800; text-transform: uppercase; letter-spacing: .1em;
}
.chain-card-heart {
  position: relative; z-index: 1; display: grid; place-items: center; width: 3.1rem; height: 3.1rem;
  border-radius: 999px; background: var(--chain-pink); color: #fff; font-size: 1.65rem;
  box-shadow: 0 0 0 12px rgba(201,0,90,0.16), 0 0 28px rgba(201,0,90,0.45);
}
.chain-card-amount {
  position: absolute; z-index: 1; bottom: .75rem; left: .75rem; right: .75rem;
  color: var(--chain-gold); font-weight: 900; font-size: 1.25rem;
}
.chain-card-spark {
  position: absolute; z-index: 1; width: .55rem; height: .55rem; border-radius: 999px;
  background: var(--chain-gold); box-shadow: 0 0 14px rgba(244,180,26,0.8);
}
.chain-card-spark.one { left: 20%; top: 34%; }
.chain-card-spark.two { right: 20%; top: 39%; background: #ff4d94; box-shadow: 0 0 14px rgba(255,77,148,0.8); }
.chain-card-spark.three { left: 28%; bottom: 24%; background: #93b3d9; box-shadow: 0 0 14px rgba(147,179,217,0.8); }
.chain-tag { display: inline-block; font-size: .72rem; font-weight: 700; padding: .12rem .55rem; border-radius: 999px; background: #eef3fb; color: var(--chain-navy); text-transform: capitalize; }
.chain-tag.donation { background: #fde7f0; color: var(--chain-pink); }
.chain-tag.completed { background: #e4f6ea; color: #15803d; }

/* How it works */
.chain-steps { display: grid; grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); gap: 1rem; }
.chain-step { background: #fff; border: 1px solid var(--chain-line); border-radius: 12px; padding: 1.1rem; }
.chain-step .num { width: 2rem; height: 2rem; border-radius: 999px; background: var(--chain-navy); color: #fff; font-weight: 800; display: grid; place-items: center; margin-bottom: .5rem; }
.chain-step h3 { margin: 0 0 .3rem; color: var(--chain-navy); font-size: 1.05rem; }
.chain-step p { margin: 0; color: var(--chain-muted); font-size: .92rem; }

/* Forms */
.chain-field { display: block; margin: 0 0 1rem; }
.chain-field > span { display: block; font-weight: 700; margin: 0 0 .3rem; color: var(--chain-navy); }
.chain-field input, .chain-field select, .chain-field textarea {
  width: 100%; box-sizing: border-box; border: 1px solid #c6d2e2; border-radius: 10px; padding: .7rem .8rem; font-size: 1rem; font-family: inherit;
}
.chain-check { display: flex; gap: .6rem; align-items: flex-start; margin: 0 0 .8rem; font-size: .95rem; }
.chain-amounts { display: flex; flex-wrap: wrap; gap: .5rem; margin: 0 0 .8rem; }
.chain-amount { border: 1px solid #c6d2e2; background: #fff; border-radius: 999px; padding: .5rem 1rem; font-weight: 700; cursor: pointer; }
.chain-amount.is-active { background: var(--chain-navy); color: #fff; border-color: var(--chain-navy); }

.chain-note { background: #fff7f9; border: 1px solid #f3c6d6; border-radius: 12px; padding: .9rem 1.1rem; font-size: .92rem; color: var(--chain-ink); }
.chain-safety { background: #eef7ee; border: 1px solid #cfe6cf; border-radius: 12px; padding: .9rem 1.1rem; font-size: .92rem; }
.chain-banner { border-radius: 12px; padding: .9rem 1.1rem; margin: 0 0 1rem; font-weight: 600; }
.chain-banner.good { background: #e4f6ea; border: 1px solid #bfe6c9; color: #15803d; }
.chain-banner.info { background: #eaf1fb; border: 1px solid #cbdcf3; color: var(--chain-navy); }

/* Share buttons */
.chain-share { display: flex; flex-wrap: wrap; gap: .5rem; }
.chain-share a, .chain-share button { text-decoration: none; border: 1px solid var(--chain-line); background: #fff; color: var(--chain-navy); border-radius: 10px; padding: .55rem .9rem; font-weight: 700; font-size: .9rem; cursor: pointer; }
.chain-copy { display: flex; gap: .5rem; }
.chain-copy input { flex: 1; min-width: 0; border: 1px solid #c6d2e2; border-radius: 10px; padding: .6rem .7rem; font-size: .9rem; }

/* Responsive layouts (inline grids collapse on small screens) */
.chain-link-grid { display: grid; grid-template-columns: 1.4fr 1fr; gap: 1.4rem; align-items: start; }
.chain-field-pair { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
@media (max-width: 760px) { .chain-link-grid { grid-template-columns: 1fr; } }
@media (max-width: 520px) { .chain-field-pair { grid-template-columns: 1fr; } }

/* Nomination options */
.chain-options { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 1rem; }
.chain-option { background: #fff; border: 1px solid var(--chain-line); border-radius: 14px; padding: 1.3rem; text-align: center; }
.chain-option .ic { font-size: 2rem; }
.chain-option h3 { color: var(--chain-navy); margin: .4rem 0 .3rem; }
.chain-option p { color: var(--chain-muted); font-size: .9rem; margin: 0 0 1rem; }

/* Live visualisation container */
.chain-canvas-wrap {
  position: relative; border-radius: 16px; overflow: hidden;
  width: 100%; max-width: 100%; box-sizing: border-box;
  aspect-ratio: 16 / 10; min-height: 340px; max-height: 640px;
  background:
    radial-gradient(700px 340px at 50% 44%, rgba(201,0,90,0.18), transparent 65%),
    radial-gradient(900px 500px at 15% 0%, rgba(63,110,190,0.25), transparent 60%),
    linear-gradient(165deg, #030f24, #0a2c58 55%, #06213f);
}
.chain-canvas-wrap svg { position: absolute; inset: 0; width: 100%; height: 100%; display: block; }
.chain-canvas-hint { position: absolute; inset: 0; display: grid; place-items: center; color: #cfe0f5; font-size: .95rem; }
.chain-canvas-cta {
  position: absolute; inset: 0; display: grid; place-items: center; text-align: center;
  background: radial-gradient(420px 220px at 50% 55%, rgba(3,15,36,0.72), transparent 75%);
}
.chain-canvas-cta > div { text-align: center; padding: 1.2rem; }
.chain-canvas-cta p { color: #fff; font-weight: 800; font-size: 1.15rem; margin: 0 0 .8rem; text-shadow: 0 2px 10px rgba(0,0,0,0.5); }
@media (max-width: 620px) {
  .chain-canvas-wrap {
    aspect-ratio: auto;
    min-height: 0;
    height: clamp(240px, 72vw, 300px);
  }
}

/* Legend sits BELOW the dark canvas, on the light page background — dark text.
   Swatch colours match the node palette in chain.js. */
.chain-legend { display: flex; flex-wrap: wrap; gap: .6rem 1.2rem; color: var(--chain-muted); font-size: .85rem; margin-top: .7rem; }
.chain-legend i { display: inline-block; width: .8rem; height: .8rem; border-radius: 999px; margin-right: .35rem; vertical-align: middle; box-shadow: inset 0 0 0 1px rgba(0,43,95,0.18); }

/* Next-step guidance callout (the obvious "share + nominate 3" step) */
.chain-next {
  background: linear-gradient(135deg, #002b5f, #0a3a72);
  color: #fff; border-radius: 16px; padding: 1.3rem 1.4rem; margin: 0 0 1.2rem;
  box-shadow: 0 6px 20px rgba(0,43,95,0.18);
}
.chain-next h2 { color: #fff; margin: 0 0 .8rem; font-size: 1.2rem; }
.chain-next-steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: .7rem; }
.chain-next-step { background: rgba(255,255,255,0.1); border: 1px solid rgba(255,255,255,0.16); border-radius: 12px; padding: .7rem .8rem; font-size: .9rem; }
.chain-next-step b { display: block; color: var(--chain-gold); font-size: .8rem; letter-spacing: .04em; margin-bottom: .2rem; }
.chain-next-step.is-now { background: rgba(244,180,26,0.16); border-color: rgba(244,180,26,0.5); }
@media (max-width: 620px) { .chain-next-steps { grid-template-columns: 1fr; } }
.chain-nominate-list {
  display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: .55rem; margin: .85rem 0;
}
.chain-nominate-list span {
  display: grid; gap: .25rem; min-width: 0;
  padding: .65rem .7rem; border-radius: 10px; background: #fff7fb; border: 1px solid #f3c6d6;
  color: var(--chain-ink); font-size: .84rem; font-weight: 700;
}
.chain-nominate-list b {
  display: grid; place-items: center; width: 1.55rem; height: 1.55rem; border-radius: 999px;
  background: var(--chain-pink); color: #fff; font-size: .8rem;
}
.chain-nominate-list.compact { grid-template-columns: 1fr; }
.chain-nominate-list.compact span { grid-template-columns: auto 1fr; align-items: center; }
@media (max-width: 620px) {
  .chain-hero-path { grid-template-columns: 1fr; }
  .chain-hero-path span + span::before { display: none; }
  .chain-nominate-list { grid-template-columns: 1fr; }
}

/* Achievement badges */
.chain-badges { display: flex; flex-wrap: wrap; gap: .6rem; }
.chain-badge { display: flex; align-items: center; gap: .5rem; background: #fff; border: 1px solid var(--chain-line); border-radius: 999px; padding: .35rem .8rem .35rem .5rem; }
.chain-badge .ic { font-size: 1.3rem; }
.chain-badge b { color: var(--chain-navy); font-size: .85rem; }
.chain-badge span { color: var(--chain-muted); font-size: .72rem; }
.chain-badge-next { color: var(--chain-muted); font-size: .85rem; margin: .6rem 0 0; }

/* Downloadable share card preview */
.chain-sharecard { text-align: center; }
.chain-sharecard canvas { width: 100%; max-width: 340px; height: auto; border-radius: 14px; box-shadow: 0 10px 30px rgba(0,43,95,0.28); display: inline-block; }

/* Leaderboard + towns (live page) */
.chain-board { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
@media (max-width: 720px) { .chain-board { grid-template-columns: 1fr; } }
.chain-board ol { margin: 0; padding: 0; list-style: none; counter-reset: lb; }
.chain-board li { counter-increment: lb; display: flex; align-items: baseline; gap: .6rem; padding: .5rem 0; border-top: 1px solid var(--chain-line); }
.chain-board li::before { content: counter(lb); font-weight: 800; color: var(--chain-gold); width: 1.4rem; }
.chain-board a { color: var(--chain-navy); font-weight: 700; text-decoration: none; }
.chain-board .val { margin-left: auto; color: var(--chain-muted); font-weight: 700; white-space: nowrap; }
.chain-towns { display: flex; flex-wrap: wrap; gap: .5rem; }
.chain-town { background: #eef3fb; border: 1px solid var(--chain-line); border-radius: 999px; padding: .3rem .8rem; font-size: .9rem; color: var(--chain-navy); }
.chain-town b { color: var(--chain-pink); }
.chain-impact {
  display: grid; grid-template-columns: minmax(360px, 1.25fr) minmax(260px, .75fr); gap: 1.2rem; align-items: stretch;
}
.chain-impact-map {
  min-height: 430px; border-radius: 16px; overflow: hidden; position: relative;
  background:
    radial-gradient(420px 260px at 50% 48%, rgba(201,0,90,0.2), transparent 68%),
    radial-gradient(360px 260px at 76% 20%, rgba(244,180,26,0.18), transparent 66%),
    linear-gradient(160deg, #041d3d, #0a2c58);
  border: 1px solid rgba(255,255,255,0.16);
  box-shadow: 0 18px 44px rgba(0,43,95,0.18);
}
.chain-impact-map-canvas { position: absolute; inset: 0; z-index: 1; min-height: 430px; background: #061b36; }
.chain-impact-map .leaflet-container { background: #061b36; font-family: inherit; }
.chain-impact-map .leaflet-tile-pane {
  filter: invert(1) hue-rotate(175deg) saturate(.78) brightness(.62) contrast(1.08);
}
.chain-impact-map .leaflet-control-zoom {
  border: 1px solid rgba(255,255,255,0.2); box-shadow: 0 10px 26px rgba(0,0,0,0.24);
}
.chain-impact-map .leaflet-control-zoom a {
  background: rgba(4,29,61,0.9); color: #fff; border-color: rgba(255,255,255,0.18);
}
.chain-impact-map .leaflet-control-zoom a:hover { background: rgba(201,0,90,0.92); color: #fff; }
.chain-impact-map .leaflet-control-attribution {
  background: rgba(4,29,61,0.78); color: rgba(255,255,255,0.82); font-size: .68rem;
}
.chain-impact-map .leaflet-control-attribution a { color: #fff; }
.chain-impact-map::after {
  content: ""; position: absolute; inset: 0; z-index: 2; pointer-events: none;
  background:
    radial-gradient(340px 240px at 50% 48%, rgba(201,0,90,0.16), transparent 70%),
    linear-gradient(180deg, rgba(0,43,95,0.18), rgba(0,43,95,0.42));
  mix-blend-mode: screen;
}
.chain-impact-map-fallback {
  position: absolute; inset: 0; z-index: 0; display: grid; place-items: center; gap: .35rem; text-align: center;
  padding: 1.2rem; color: #fff;
}
.chain-impact-map-fallback strong { color: #fff; font-size: 1.05rem; }
.chain-impact-map-fallback span { color: rgba(255,255,255,0.8); max-width: 28ch; }
.chain-impact-map.is-unavailable .chain-impact-map-fallback { z-index: 3; background: rgba(4,29,61,0.82); }
.chain-impact-marker-wrap { background: transparent; border: 0; }
.chain-impact-marker {
  position: relative; display: grid; width: var(--marker-size, 32px); height: var(--marker-size, 32px);
  place-items: center;
}
.chain-impact-marker-halo {
  position: absolute; inset: -55%; border-radius: 999px;
  background: radial-gradient(circle, rgba(255,77,148,0.72) 0%, rgba(201,0,90,0.34) 42%, rgba(201,0,90,0) 72%);
  animation: chainMapPulse 2.6s ease-out var(--d, 0s) infinite;
}
.chain-impact-marker-core {
  position: relative; display: grid; place-items: center; width: 72%; height: 72%; border-radius: 999px;
  background: var(--chain-gold); color: var(--chain-pink); font-size: calc(var(--marker-size, 32px) * .4);
  font-family: Arial, sans-serif; font-weight: 800; line-height: 1; border: 2px solid #fff;
  box-shadow: 0 0 0 4px rgba(244,180,26,0.18), 0 0 22px rgba(244,180,26,0.62);
}
.chain-impact-popup { display: grid; gap: .18rem; min-width: 140px; }
.chain-impact-popup strong { color: var(--chain-navy); font-size: .98rem; }
.chain-impact-popup span { color: var(--chain-muted); font-size: .82rem; font-weight: 700; }
.chain-impact-list {
  background: #fff; border: 1px solid var(--chain-line); border-radius: 14px; padding: 1.3rem;
  box-shadow: 0 2px 10px rgba(0,43,95,0.05);
}
.chain-impact-list h3 { color: var(--chain-navy); margin: 0 0 .4rem; }
.chain-impact-list p { color: var(--chain-muted); margin-top: 0; }
@media (max-width: 820px) {
  .chain-impact { grid-template-columns: 1fr; }
  .chain-impact-map, .chain-impact-map-canvas { min-height: 360px; }
}

/* Network animation system (chain.js). Entrance animations only run on the
   .anim variant — chain.js omits it on very large graphs to avoid mobile jank. */
.chain-star { animation: chainTwinkle var(--twd, 4s) ease-in-out var(--twb, 0s) infinite; }
.chain-edge.anim { stroke-dasharray: 1; stroke-dashoffset: 1; animation: chainEdgeIn 1.2s ease-out both; }
.chain-node.anim { transform-box: fill-box; transform-origin: center; animation: chainEnter .55s cubic-bezier(.34, 1.56, .64, 1) both; }
.chain-node[href] { cursor: pointer; }
.chain-node circle.core { transform-box: fill-box; transform-origin: center; transition: transform .18s ease; }
.chain-node[href]:hover circle.core, .chain-node[href]:focus-visible circle.core { transform: scale(1.3); }
.chain-node[href]:focus:not(:focus-visible) { outline: none; }
.chain-node[href]:focus-visible { outline: none; }
.chain-node[href]:focus-visible circle.core { stroke: #fff; stroke-width: 2.5px; }
.chain-ambient { opacity: .34; }
.chain-ambient.is-solo { opacity: .6; }
.chain-heart { transform-box: fill-box; transform-origin: center; animation: chainHeartbeat 2.4s ease-in-out infinite; }
.chain-pulse { transform-box: fill-box; transform-origin: center; animation: chainPulse 2.4s ease-out infinite; }
@keyframes chainTwinkle { 0%, 100% { opacity: .12; } 50% { opacity: .7; } }
@keyframes chainEdgeIn { to { stroke-dashoffset: 0; } }
@keyframes chainEnter { from { opacity: 0; transform: scale(.2); } to { opacity: 1; transform: scale(1); } }
@keyframes chainHeartbeat { 0%, 100% { transform: scale(1); } 12% { transform: scale(1.12); } 24% { transform: scale(1); } 36% { transform: scale(1.07); } 48% { transform: scale(1); } }
@keyframes chainPulse { 0% { transform: scale(1); opacity: .55; } 100% { transform: scale(2.6); opacity: 0; } }
@keyframes chainMapPulse { 0% { opacity: .72; transform: scale(.74); } 100% { opacity: 0; transform: scale(1.45); } }
@media (prefers-reduced-motion: reduce) {
  .chain-star, .chain-edge.anim, .chain-node.anim, .chain-heart, .chain-pulse, .chain-impact-marker-halo { animation: none; }
  .chain-edge.anim { stroke-dashoffset: 0; }
}