.s4-board-wrap{margin-top:6px}.s4-board{--s4-cell-bg: #ffffff;--s4-given-bg: #f1f5f9;--s4-given-ink: #1e293b;--s4-peer-bg: #f5f3ff;--s4-sel-bg: #ede9fe;--s4-same-bg: #e9d5ff;--s4-line-cell: #e5e1f0;--s4-line-box: #3730a3;--s4-line-outer: #1e1b4b;--s4-accent: #4f46e5;--s4-accent-soft: #ede9fe;--s4-user-ink: #4f46e5;--s4-conflict: #dc2626;display:grid;grid-template-columns:repeat(4,1fr);width:min(420px,100%);margin:0 auto;background:var(--s4-cell-bg);border-radius:16px;padding:0;border:3px solid var(--s4-line-outer);box-sizing:border-box;-webkit-user-select:none;-moz-user-select:none;user-select:none;position:relative;overflow:hidden}body.arena:not(.skin-paper) .s4-board{--s4-cell-bg: #0f172a;--s4-given-bg: #1e293b;--s4-given-ink: #e5e7eb;--s4-peer-bg: #1b1530;--s4-sel-bg: #2a2150;--s4-same-bg: #3b2d6b;--s4-line-cell: #334155;--s4-line-box: #818cf8;--s4-line-outer: #a5b4fc;--s4-accent: #818cf8;--s4-accent-soft: #2a2150;--s4-user-ink: #a5b4fc;--s4-conflict: #fca5a5}.s4-board .grid-lines{position:absolute;inset:0;width:100%;height:100%;pointer-events:none;z-index:3;display:block}.s4-board .grid-lines .l-cell{fill:var(--s4-line-cell)}.s4-board .grid-lines .l-box{fill:var(--s4-line-box)}.s4-board .c4cell{aspect-ratio:1;display:flex;align-items:center;justify-content:center;background:var(--s4-cell-bg);border:0;box-sizing:border-box;font-family:var(--font-sans);font-weight:700;font-size:clamp(1.8rem,11vw,2.7rem);font-variant-numeric:tabular-nums;line-height:1;text-box:trim-both cap alphabetic;padding-top:.08em;color:var(--s4-user-ink);cursor:pointer;transition:background .12s,box-shadow .12s,color .12s;position:relative}@media(max-width:767px){.s4-board .c4cell{padding-top:.02em}}.s4-board .c4cell.given{background:var(--s4-given-bg);color:var(--s4-given-ink);cursor:default}.s4-board .c4cell.entry{color:var(--s4-user-ink)}.s4-board .c4cell.sel{background:var(--s4-sel-bg);box-shadow:inset 0 0 0 2.5px var(--s4-accent);z-index:2}.s4-board .c4cell.peer{background:var(--s4-peer-bg)}.s4-board .c4cell.same{background:var(--s4-same-bg)}.s4-board .c4cell.conflict{color:var(--s4-conflict);box-shadow:inset 3px 0 0 0 var(--s4-conflict)}.s4-board .c4cell.pop span{animation:s4pop .28s var(--ease-spring, cubic-bezier(.34, 1.56, .64, 1))}@keyframes s4pop{0%{transform:scale(.4);opacity:0}to{transform:scale(1);opacity:1}}.s4-board .c4cell.shake{animation:s4shake .32s ease}@keyframes s4shake{0%,to{transform:translate(0)}25%{transform:translate(-3px)}50%{transform:translate(3px)}75%{transform:translate(-2px)}}.s4-board .c4cell.marks{align-items:stretch;justify-content:stretch;padding:0}.s4-board .c4cell .n4{display:grid;grid-template-columns:repeat(2,1fr);grid-template-rows:repeat(2,1fr);width:100%;height:100%;padding:4%}.s4-board .c4cell .n4 i{display:flex;align-items:center;justify-content:center;font-style:normal;font-family:var(--font-sans);font-weight:500;font-size:.34em;line-height:1;color:transparent}.s4-board .c4cell .n4 i.on{color:var(--s4-user-ink);opacity:.62}.s4-pad{display:grid;grid-template-columns:repeat(2,1fr);gap:10px;max-width:300px;margin:16px auto 0}.s4-pad .pk{position:relative;padding:18px 0;border-radius:14px;background:var(--s4-cell-bg);border:1px solid var(--s4-line-cell);color:var(--s4-accent);font-family:var(--font-sans);font-size:clamp(1.4rem,7vw,1.9rem);font-weight:700;font-variant-numeric:tabular-nums;line-height:1;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:background .12s,transform .06s,border-color .12s,color .12s}.s4-pad .pk:hover{background:var(--s4-accent-soft)}.s4-pad .pk:active{transform:translateY(1px)}.s4-pad .s4-padfoot{grid-column:1 / -1;display:flex;gap:10px}.s4-pad .s4-padfoot .pk{flex:1;padding:12px;font-size:.95rem;color:var(--text-muted)}.s4-pad .pk.erase:hover{color:var(--text);background:transparent}.s4-pad .pk.notes:hover{color:var(--s4-accent)}.s4-pad .pk.notes.on{border-color:var(--s4-accent);background:var(--s4-accent-soft);color:var(--s4-accent)}.s4-pad .pk .pk-left{position:absolute;top:6px;right:9px;font-size:.62rem;font-weight:600;line-height:1;color:var(--text-muted);font-variant-numeric:tabular-nums}.s4-pad .pk.done{opacity:.32;cursor:default}.s4-pad .pk.done:hover{border-color:var(--s4-line-cell);background:var(--s4-cell-bg);color:var(--s4-accent)}.s4-pad .pk:focus-visible{outline:2px solid var(--s4-accent);outline-offset:2px}.s4-verdict{font-family:var(--font-display);font-weight:800;font-size:1.7rem;color:var(--brand-text)}.s4-newbest{margin-top:8px;font-size:.85rem;color:var(--warning-strong);font-weight:600}.modal .s4-verdict{text-align:center}