--pc-* tokens (dark-safe). .spl-* is disjoint per ADR-033. */ .spl-younger{--spl-tile: 76px}.spl-younger .ff-btn{min-height:52px;font-size:1.05rem}.spl-hero{text-align:center}.spl-hero-emoji{font-size:4rem;line-height:1;display:block;margin:0 auto .3rem}.spl-hud{margin-top:.5rem;display:flex;gap:.5rem;flex-wrap:wrap;align-items:center;justify-content:center}.spl-section-h{text-align:center;margin:.4rem 0 .8rem}.spl-activity-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:.8rem;margin-bottom:1.2rem}@media (min-width: 620px){.spl-activity-grid{grid-template-columns:repeat(3,1fr)}}.spl-activity-card{display:flex;flex-direction:column;align-items:center;text-align:center;gap:.3rem;padding:1.1rem .8rem;background:var(--ff-paper);text-decoration:none;color:inherit;border:3px solid var(--ff-forge);border-radius:20px;box-shadow:0 4px #0000001f;transition:transform .12s ease,box-shadow .12s ease;min-height:128px;justify-content:center}.spl-activity-card:hover,.spl-activity-card:focus-visible{transform:translateY(-3px);box-shadow:0 7px #00000024;outline:none}.spl-activity-emoji{font-size:2.4rem;line-height:1}.spl-activity-card strong{font-size:1.02rem;color:var(--ff-forge-text)}.spl-activity-blurb{font-size:.9rem;color:var(--ff-anvil);opacity:.85}.spl-stage{display:flex;flex-direction:column;align-items:center;gap:.9rem}.spl-tiles{display:flex;flex-wrap:wrap;gap:.7rem;justify-content:center;margin-top:.5rem}.spl-tile{min-width:var(--spl-tile);min-height:var(--spl-tile);padding:.4rem 1rem;font-size:1.9rem;font-weight:800;color:var(--ff-anvil);background:var(--ff-paper);border:3px solid var(--ff-outline);border-radius:18px;box-shadow:0 4px #0000001f;cursor:pointer;line-height:1.1;transition:transform .1s ease}.spl-tile:hover:not(:disabled),.spl-tile:focus-visible:not(:disabled){transform:translateY(-2px);outline:none}.spl-tile:disabled{cursor:default;opacity:.85}.spl-tile--correct{background:var(--pc-correct-bg);border-color:var(--pc-correct);color:var(--pc-correct)}.spl-tile--wrong{background:var(--pc-incorrect-bg);border-color:var(--pc-incorrect)}.spl-doubleframe{display:flex;gap:.8rem;flex-wrap:wrap;justify-content:center}.spl-tenframe{display:grid;grid-template-columns:repeat(5,1fr);grid-template-rows:repeat(2,1fr);gap:4px;padding:4px;background:var(--ff-outline);border-radius:10px}.spl-tf-cell{width:34px;height:34px;background:var(--ff-warm);border-radius:6px}.spl-tf-cell--red{background:var(--pc-incorrect)}.spl-bond{display:flex;flex-direction:column;align-items:center;gap:.2rem}.spl-bond-whole{width:74px;height:74px;display:flex;align-items:center;justify-content:center;font-size:1.9rem;font-weight:800;color:#fff;background:var(--ff-forge);border:3px solid var(--ff-outline);border-radius:50%}.spl-bond-parts{display:flex;gap:2.4rem;position:relative;margin-top:.6rem}.spl-bond-parts:before,.spl-bond-parts:after{content:"";position:absolute;top:-.6rem;width:2px;height:1.1rem;background:var(--ff-outline)}.spl-bond-parts:before{left:30%;transform:rotate(24deg)}.spl-bond-parts:after{right:30%;transform:rotate(-24deg)}.spl-bond-part{width:60px;height:60px;display:flex;align-items:center;justify-content:center;font-size:1.6rem;font-weight:800;color:var(--ff-forge-text);background:var(--ff-paper);border:3px solid var(--ff-forge);border-radius:50%}.spl-bond-part--missing{color:var(--ff-slate-text);border-color:var(--ff-slate);border-style:dashed}.spl-baseten{display:flex;align-items:flex-end;gap:1rem;justify-content:center}.spl-bt-rods{display:flex;gap:5px}.spl-bt-rod{width:16px;height:80px;background:var(--ff-forge);border:2px solid var(--ff-outline);border-radius:4px;background-image:repeating-linear-gradient(to bottom,transparent 0 6px,rgba(0,0,0,.18) 6px 8px)}.spl-bt-units{display:grid;grid-template-columns:repeat(3,1fr);gap:4px;align-content:end}.spl-bt-unit{width:15px;height:15px;background:var(--ff-slate);border:2px solid var(--ff-outline);border-radius:3px}.spl-numline{width:100%;max-width:420px}.spl-nl-track{position:relative;height:8px;background:var(--ff-warm);border:2px solid var(--ff-outline);border-radius:6px;margin:1.4rem 0 .3rem}.spl-nl-marker{position:absolute;top:-12px;width:20px;height:20px;margin-left:-10px;background:var(--ff-forge);border:3px solid var(--ff-outline);border-radius:50%}.spl-nl-labels{display:flex;justify-content:space-between;font-weight:700;color:var(--ff-forge-text)}.spl-fluency-note{font-size:1.1rem;font-weight:600;color:var(--ff-slate-text)}