.bg-hub,.bg-frame{max-width:1080px;margin:0 auto;padding:48px 28px 72px}.bg-back{color:var(--muted);font-size:.88rem;text-decoration:none}.bg-hub h1,.bg-frame h1{margin:22px 0 8px;font-size:clamp(2rem,4vw,3rem);line-height:1.1;letter-spacing:-.035em}.bg-intro{font-size:1.25rem;color:var(--muted);margin:0 0 20px}.bg-hub>p{max-width:66ch}.bg-game-list{margin:38px 0;border-top:1px solid var(--line)}.bg-game-link{display:flex;align-items:center;gap:24px;padding:25px 6px;border-bottom:1px solid var(--line);text-decoration:none;color:var(--ink)}.bg-game-link>.ti:first-child{font-size:2rem;color:var(--accent);width:42px}.bg-game-link>.ti:last-child{margin-left:auto;color:var(--muted)}.bg-game-link h2{margin:0 0 4px;font-size:1.35rem}.bg-game-link p{margin:0;color:var(--body)}.bg-game-link span,.bg-hub-note{font-size:.88rem;color:var(--muted)}.bg-game-link:hover h2{color:var(--accent-strong)}.bg-header{display:flex;justify-content:space-between;align-items:flex-end;gap:24px;margin-bottom:28px}.bg-header p{margin:8px 0 0;color:var(--muted)}.bg-modes{display:flex;gap:3px;padding:4px;background:var(--surface);border:1px solid var(--line);border-radius:10px}.bg-frame button,.bg-frame select{font:inherit}.bg-modes button{border:0;background:transparent;color:var(--muted);border-radius:7px;padding:8px 16px;cursor:pointer}.bg-modes button[aria-pressed=true]{background:var(--raise);color:var(--ink);box-shadow:var(--shadow-sm)}.bg-layout{display:grid;grid-template-columns:minmax(0,600px) minmax(240px,1fr);gap:36px;align-items:start}.bg-layout.bg-focus{grid-template-columns:minmax(0,620px);justify-content:center}.bg-board-area,.bg-play{min-width:0}.bg-board{width:100%;overflow:hidden;border:1px solid var(--game-grid,var(--line));border-radius:4px;background:var(--game-board-bg,var(--surface))}.bg-board .bg-cell{margin:0;border:0;border-radius:0;padding:0;background:var(--game-square-light,var(--raise));color:#2b2925;box-shadow:none;cursor:pointer;transition:none}.bg-board .bg-cell.bg-dark{background:var(--game-square-dark,#b58863)}.bg-board .bg-cell:disabled{opacity:1;cursor:default}.bg-board .bg-cell:focus-visible{outline:3px solid var(--game-selected,var(--accent));outline-offset:-3px;z-index:2}.bg-board .bg-cell.bg-selected{box-shadow:inset 0 0 0 3px var(--game-selected,var(--accent))}.bg-target{position:absolute;width:22%;height:22%;top:39%;left:39%;border-radius:50%;background:var(--game-legal-move,#0e7c86);opacity:.85;pointer-events:none}.bg-legal:has(img) .bg-target{width:84%;height:84%;top:8%;left:8%;background:transparent;border:3px solid var(--game-legal-move,#0e7c86)}.bg-selection-mark{position:absolute;top:7%;right:7%;width:10%;height:10%;background:var(--game-selected,#0e7c86);border-radius:2px;pointer-events:none}.bg-rank,.bg-file{position:absolute;font-size:clamp(.55rem,1.2vw,.75rem);line-height:1;font-weight:600;opacity:.9;pointer-events:none}.bg-rank{left:5%;top:5%}.bg-file{right:5%;bottom:5%}.bg-threatened:after{content:"!";position:absolute;bottom:4%;right:7%;font-weight:700;font-size:.85rem;color:#7a281a}.bg-sudoku .bg-cell{border-right:1px solid var(--game-grid,var(--line));border-bottom:1px solid var(--game-grid,var(--line));color:var(--accent-strong);font-variant-numeric:tabular-nums;font-size:clamp(1.1rem,3vw,1.8rem);background:var(--game-square-light,var(--raise))}.bg-sudoku .bg-cell.bg-given{color:var(--ink);font-weight:600}.bg-sudoku .bg-cell.bg-box-right{border-right:2px solid var(--muted)}.bg-sudoku .bg-cell.bg-box-bottom{border-bottom:2px solid var(--muted)}.bg-sudoku .bg-highlighted{box-shadow:inset 0 0 0 2px var(--game-selected)}.bg-go .bg-cell{background:transparent}.bg-go .bg-cell:hover:not(:disabled){box-shadow:inset 0 0 0 1px var(--game-selected)}.bg-status{display:flex;align-items:center;gap:12px;justify-content:space-between;margin:16px 0;font-weight:500;color:var(--ink)}.bg-controls,.bg-actions{display:flex;flex-wrap:wrap;gap:8px;margin:14px 0}.bg-frame .bg-controls button,.bg-frame .bg-actions button,.bg-frame .bg-button{border:1px solid var(--line);padding:8px 13px;border-radius:8px;background:var(--raise);color:var(--ink);cursor:pointer}.bg-frame button:disabled:not(.bg-cell){opacity:.5;cursor:default}.bg-frame .bg-primary{background:var(--accent-strong);color:var(--bg);border-color:var(--accent-strong)}.bg-settings{display:flex;flex-wrap:wrap;gap:16px;margin:20px 0;padding-top:16px;border-top:1px solid var(--line)}.bg-settings label{display:flex;flex-direction:column;gap:5px;font-size:.82rem;color:var(--muted)}.bg-settings select{max-width:100%;padding:7px 9px;border:1px solid var(--line);border-radius:7px;background:var(--raise);color:var(--ink)}.bg-error{border:1px solid var(--line);border-radius:9px;padding:12px 14px;margin:14px 0;color:var(--ink);background:var(--surface)}.bg-save,.bg-help,.bg-note{color:var(--muted);font-size:.84rem;line-height:1.6}.bg-coach{padding-left:24px;border-left:1px solid var(--line)}.bg-coach h2{font-size:1.25rem;margin:0 0 16px}.bg-coach h3{margin:26px 0 8px;font-size:1rem}.bg-coach p{color:var(--body);margin:8px 0;font-size:.95rem;line-height:1.7}.bg-coach ol{padding-left:24px;max-height:280px;overflow:auto;font-size:.9rem}.bg-coach summary{cursor:pointer;font-weight:600}.bg-coach a{color:var(--accent-strong)}.bg-promotion{padding:14px;border:1px solid var(--accent);background:var(--surface);border-radius:9px;margin:12px 0}.bg-digits{display:grid;grid-template-columns:repeat(9,minmax(0,1fr));gap:5px;margin:14px 0}.bg-digits button{min-height:42px;border:1px solid var(--line);background:var(--raise);color:var(--ink);border-radius:7px;cursor:pointer}.bg-score{width:100%;border-collapse:collapse;font-size:.9rem;margin:16px 0}.bg-score th,.bg-score td{padding:6px 10px;text-align:right;border-bottom:1px solid var(--line);font-variant-numeric:tabular-nums}.bg-score th:first-child{text-align:left}@media (max-width:760px){.bg-hub,.bg-frame{padding:28px 16px 48px}.bg-header{flex-direction:column;align-items:flex-start;gap:18px}.bg-header h1{margin-top:16px}.bg-layout{grid-template-columns:minmax(0,1fr);gap:26px}.bg-coach{border-left:0;border-top:1px solid var(--line);padding:18px 0 0}.bg-game-link{gap:16px}.bg-game-link>.ti:first-child{width:30px;font-size:1.6rem}.bg-game-link p{font-size:.95rem}}@media (prefers-reduced-motion:reduce){.bg-frame *,.bg-hub *{transition:none;animation:none}}.bg-player{display:flex;justify-content:space-between;color:var(--muted);font-size:.86rem;margin:12px 0}.bg-player-bottom{margin-bottom:18px}.bg-game-top-controls{min-width:175px}.bg-game-top-controls .bg-status{justify-content:flex-end}.bg-panel-tabs{display:flex;gap:8px;margin-bottom:24px;border-bottom:1px solid var(--line)}.bg-panel-tabs button{padding:8px 12px;background:transparent;border:0;color:var(--muted);cursor:pointer}.bg-panel-tabs button[aria-selected=true],.bg-panel-tabs button[aria-pressed=true]{color:var(--accent-strong);border-bottom:2px solid var(--accent)}.bg-facts{margin:24px 0}.bg-facts>div{display:flex;justify-content:space-between;gap:16px;padding:7px 0;border-bottom:1px solid var(--line);font-size:.9rem}.bg-facts dt{color:var(--muted)}.bg-facts dd{margin:0;color:var(--ink)}.bg-guide-links a{display:block;margin:8px 0}.bg-promotion button{margin:8px 4px 0 0;padding:8px 12px;border:1px solid var(--line);border-radius:7px;color:var(--ink);background:var(--raise);cursor:pointer}.bg-digits button:nth-child(n+10){grid-column:span 4}.bg-empty{padding:36px 20px;text-align:center;background:var(--surface);border:1px solid var(--line);border-radius:9px}.bg-board .bg-stone{background:var(--game-piece-dark,#131316)}.bg-board .bg-stone.bg-white{background:var(--game-piece-light,#f2f2f4)}@media (max-width:760px){.bg-game-top-controls{width:100%}.bg-game-top-controls .bg-status{justify-content:flex-start}}.bg-checkers .bg-checker{background:var(--game-piece-dark,#131316)}.bg-checkers .bg-checker.bg-white{background:var(--game-piece-light,#f2f2f4)}.bg-go{--bg-go-line:var(--game-grid,#78654b)}.bg-board .bg-cell[aria-disabled=true]{cursor:default}.bg-review{display:grid;gap:4px;margin:0 0 16px;padding:12px 14px;border:1px solid var(--line);border-left:3px solid var(--accent-strong);border-radius:6px;font-size:.92rem;line-height:1.6}.bg-review strong{color:var(--ink)}.bg-review span{color:var(--body)}.bg-review[data-rating=inaccuracy]{border-left-color:var(--warn)}.bg-review[data-rating=mistake],.bg-review[data-rating=blunder]{border-left-color:var(--danger)}.bg-eval{font-weight:600}.bg-insights{margin:0;padding-left:20px;font-size:.92rem;line-height:1.6;color:var(--body)}.bg-insights li+li{margin-top:6px}