.hub-shell{max-width:1180px;margin:auto;padding:1rem;color:#14231d}.hub-shell h1{font-size:1.5rem}.hub-shell button,.hub-shell select{font:inherit;font-size:1rem}.game-nav{display:flex;gap:.5rem;flex-wrap:wrap;margin:1rem 0}.game-nav button,.game-nav a{padding:.65rem 1rem;background:#fff;border:1px solid #c1c9c1;border-radius:8px;text-decoration:none;color:#14231d}.game-nav button[aria-current=true]{background:#14231d;color:#f1d19a}.hub-play{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:1.5rem}.hub-board-column h2{font-size:1.25rem;margin:.5rem 0}#gameStatus{min-height:2rem}.hub-board{display:grid;width:100%;aspect-ratio:1;background:#d6aa62;border:8px solid #5b4126;gap:0;box-shadow:0 8px 24px #14231d20;touch-action:manipulation}.hub-board button{position:relative;border:0;border-radius:0;background:none;padding:0;min-width:0;aspect-ratio:1;cursor:pointer;font-size:clamp(16px,4vw,42px)}.hub-board button:focus-visible{outline:3px solid #13806b;outline-offset:-3px;z-index:2}.hub-board.go button:before,.hub-board.gomoku button:before{content:'';position:absolute;left:0;right:0;top:50%;height:1px;background:#73532a}.hub-board.go button:after,.hub-board.gomoku button:after{content:'';position:absolute;top:0;bottom:0;left:50%;width:1px;background:#73532a}.hub-stone{position:absolute;inset:8%;border-radius:50%;z-index:1;box-shadow:1px 2px 3px #0006}.hub-stone.b{background:#171c1b;border:1px solid #070909}.hub-stone.w{background:#fff;border:1px solid #aaa}.hub-stone.dead{opacity:.35}.hub-board button.last .hub-stone:after{content:'';position:absolute;inset:35%;border:2px solid #db9c30;border-radius:50%}.hub-board.chess{background:#fff}.hub-board.chess button.light{background:#eff2e9}.hub-board.chess button.dark{background:#779482}.hub-board.chess button.selected{box-shadow:inset 0 0 0 4px #d5a628}.hub-board.chess button.legal-target{box-shadow:inset 0 0 0 3px #15694f}.hub-board.chess button.last{background:#c7c77a}.chess-glyph{display:block;color:#0e1b16;line-height:1}.chess-glyph.w{text-shadow:0 0 2px #fff,0 1px 1px #fff}.square-label{position:absolute;left:2px;bottom:1px;font-size:12px;color:#14231d}.hub-controls{background:#fff;padding:1rem;border:1px solid #d2dace;border-radius:12px;align-self:start}.hub-controls label{display:block;margin:.6rem 0 .3rem}.hub-controls select{width:100%;padding:.5rem;border-radius:5px;border:1px solid #a6b3a8}.hub-actions{display:flex;gap:.5rem;flex-wrap:wrap}.hub-actions button{padding:.55rem;border-radius:6px;border:1px solid #b3bfb3;background:#f4f6ef;cursor:pointer}.hub-shell [hidden]{display:none!important}.hub-controls details{font-size:1rem;line-height:1.65;margin-top:1rem}.hub-controls summary{font-weight:600;cursor:pointer}#aiNote,#modeNote{color:#46554b;font-size:.875rem;line-height:1.5}#hubMoves{max-height:180px;overflow:auto;font-size:.875rem;padding-left:1.5rem}.hub-progress{border-top:1px solid #bec8bc;margin-top:2rem;padding-top:1rem}.hub-progress h2{font-size:1.15rem}#plannedGames{display:flex;gap:1rem;flex-wrap:wrap}#plannedGames article{flex:1;min-width:200px;background:#e9eee6;padding:1rem;border-radius:8px}#plannedGames h3{margin:0 0 .5rem;font-size:1rem}#plannedGames p{font-size:.875rem;line-height:1.5}.hub-shell footer{margin-top:1rem;font-size:.875rem}.hub-shell button:disabled{cursor:not-allowed;opacity:.5}@media(max-width:780px){.hub-play{grid-template-columns:1fr}.hub-controls{width:100%;box-sizing:border-box}.hub-board{box-sizing:border-box}.hub-shell{padding:.65rem}.topbar{flex-wrap:wrap}.hub-board.chess button{font-size:clamp(20px,8vw,42px)}}
body:has(.hub-shell){background:#0b1220;font-family:system-ui,-apple-system,"Microsoft YaHei",sans-serif}.hub-shell{color:#edf3ff}.hub-shell .topbar>a{color:#b9e7ff;margin-left:18px}.hub-board-column #gameStatus{background:#162238;border-left:3px solid #54d3ee;color:#e8f4ff;padding:12px 16px;border-radius:6px}.hub-controls{color:#172439;background:#f6f9ff;border-color:#bed0e4;box-shadow:0 16px 45px #0003}.hub-shell .game-nav a,.hub-shell .game-nav button{background:#162238;color:#e3eeff;border-color:#465875}.hub-shell .game-nav button[aria-current=true]{background:#164f65;border-color:#65d7f5;color:white}.hub-shell #plannedGames article{background:#162238;color:#e3eeff;border:1px solid #465875}.hub-shell a{color:#aee8ff}.hub-shell .hub-board{border-radius:8px}.hub-shell .language-picker [aria-pressed=true]{background:#e3f4ff;color:#142239}.hub-shell .primary-btn{background:#0a6077}.hub-shell .hub-controls button:disabled{opacity:.65}
.hub-board.chess button{width:100%;height:100%;transform:none}.hub-board.chess button.legal-target{position:relative;transform:none;width:100%;background-image:radial-gradient(circle,#0d576d80 0 17%,transparent 19%)}.hub-board.chess button.legal-target .chess-glyph{position:relative;z-index:1}.hub-board.chess button.legal-target:has(.chess-glyph){box-shadow:inset 0 0 0 4px #0d576d}.chess-glyph,.square-label{pointer-events:none}
@media(min-width:950px){.hub-play:has(#rulesPanel:not([open])){grid-template-columns:minmax(0,1fr) 240px}}
/* Neutral tournament board: strong silhouettes without glowing outlines. */
.hub-board.chess{border:8px solid #334155;container-type:inline-size;box-shadow:0 14px 35px #0005}
.hub-board.chess button.light{background:#dce1e7}.hub-board.chess button.dark{background:#8895a5}
.hub-board.chess .chess-glyph{font-family:"Segoe UI Symbol","DejaVu Sans",sans-serif;font-size:clamp(26px,10cqw,78px);line-height:1.05;font-variant-emoji:text}
.hub-board.chess .chess-glyph.w{color:#fff;-webkit-text-stroke:1.6px #17202d;text-shadow:0 2px 1px #17202d}
.hub-board.chess .chess-glyph.b{color:#10151d;-webkit-text-stroke:.6px #e4e9ef;text-shadow:0 2px 1px #ffffff70}
.hub-board.chess button.last{background:#adc7bb;box-shadow:inset 0 0 0 2px #346c58}
.hub-board.chess button.selected{background:#f1cc73;box-shadow:inset 0 0 0 4px #875009}
.hub-board.chess button.legal-target{background-image:radial-gradient(circle,#174b3b 0 13%,#fff 14% 18%,transparent 19%);box-shadow:none}
.hub-board.chess button.legal-target:has(.chess-glyph){background-image:none;box-shadow:inset 0 0 0 4px #a02e28}
.hub-board.chess .square-label{color:#233144;font-weight:700;font-size:clamp(10px,1.7cqw,13px);line-height:1}
.hub-board.chess button.dark .square-label{color:#172333;text-shadow:none}