.arb-grid9{display:flex;gap:7px;margin:18px 0 4px;flex-wrap:wrap}.arb-grid9 .arb-cell{width:40px;height:48px;border-radius:9px;background:var(--a-paper);color:var(--a-ink);display:flex;align-items:center;justify-content:center;font-family:var(--a-disp);font-weight:800;font-size:1.2rem;font-variant-numeric:tabular-nums;box-shadow:0 8px 20px #00000073}.arb-grid9 .arb-cell.hl{background:var(--a-ember);color:#160a04}.arb-rules{display:flex;flex-direction:column;gap:10px;margin-top:12px}.arb-rule{display:flex;gap:10px;font-size:.84rem;color:var(--a-mute);line-height:1.5}.arb-rule b{flex:none;width:20px;height:20px;border-radius:6px;display:inline-flex;align-items:center;justify-content:center;font-size:.72rem;background:var(--a-ember-soft);color:var(--a-ember-dim)}.board-note{margin-top:12px;margin-bottom:0;font-size:.76rem;line-height:1.5}.arb-diff-block{margin-top:22px}.arb-dl{font-size:.74rem;color:var(--a-mute);margin-bottom:10px}.arb-diff{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.arb-dbtn{-webkit-appearance:none;-moz-appearance:none;appearance:none;cursor:pointer;font-family:var(--a-ui);font-size:.9rem;font-weight:600;color:var(--a-paper);background:var(--a-ink-2);border:1px solid var(--a-line);border-radius:var(--a-r-btn);padding:10px 12px;display:flex;flex-direction:column;align-items:flex-start;gap:2px;text-align:left;transition:border-color .12s,background .12s,color .12s}.arb-dbtn small{font-size:.72rem;font-weight:400;color:var(--a-mute)}.arb-dbtn:hover{border-color:var(--a-ember-dim)}.arb-dbtn.on{border-color:var(--a-ember);background:var(--a-ember-soft);color:var(--a-ember)}.arb-dbtn.on small{color:var(--a-ember-dim)}.arb-dbtn:focus-visible{outline:2px solid var(--a-ember);outline-offset:2px}@media(max-width:560px){.arb-grid9{gap:5px}.arb-grid9 .arb-cell{width:30px;height:38px;font-size:1rem;border-radius:7px}.arb-diff{gap:7px}.arb-dbtn{padding:9px 8px;font-size:.82rem}.arb-dbtn small{font-size:.66rem}}