:root{--bg: #1a1a2e;--panel: #232342;--accent: #ffb86b;--accent2: #6bb6ff;--text: #f4f4f8;--muted: #9b9bb6;--danger: #ff5a7a;--good: #6cf09a}*{box-sizing:border-box;-webkit-tap-highlight-color:transparent;user-select:none;-webkit-user-select:none}html,body{margin:0;padding:0;width:100%;height:100%;background:radial-gradient(ellipse at top,#2a2a4e 0%,var(--bg) 70%),var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Hiragino Sans,Yu Gothic,Meiryo,sans-serif;overflow:hidden;overscroll-behavior:none;touch-action:none}#app{position:fixed;top:0;right:0;bottom:0;left:0;display:flex;flex-direction:column;align-items:center;justify-content:center}.scene{position:absolute;top:0;right:0;bottom:0;left:0;display:flex;flex-direction:column;align-items:center;justify-content:safe center;overflow-y:auto;padding:24px;gap:14px}.scene.hidden{display:none}.hidden{display:none!important}h1{font-size:2.2rem;margin:0 0 12px;text-align:center;color:var(--accent);letter-spacing:.08em;text-shadow:0 4px 16px rgba(255,184,107,.25)}h2{font-size:1.2rem;margin:0;color:var(--accent2)}button{font:inherit;font-size:1.05rem;background:linear-gradient(180deg,#ffc88a 0%,var(--accent) 100%);color:#1a1a2e;border:none;border-radius:12px;padding:14px 24px;cursor:pointer;font-weight:700;min-width:240px;box-shadow:0 3px #b8794a;transition:transform .08s,opacity .15s,box-shadow .08s}button:active:not(:disabled){transform:translateY(2px);box-shadow:0 1px #b8794a}button small{display:block;font-size:.78rem;font-weight:500;opacity:.75;margin-top:4px}button.secondary{background:var(--panel);color:var(--text);border:1px solid var(--muted);box-shadow:0 2px #0000004d}button.danger{background:var(--danger);color:#fff}button:active{transform:scale(.97)}button:disabled{opacity:.45;cursor:not-allowed}input[type=text]{font:inherit;font-size:1.4rem;text-align:center;letter-spacing:.3em;text-transform:uppercase;background:var(--panel);color:var(--text);border:2px solid var(--muted);border-radius:10px;padding:12px 16px;width:200px}.code-badge{background:var(--panel);color:var(--accent);font-size:2rem;font-weight:800;letter-spacing:.4em;padding:12px 24px;border-radius:12px;border:2px dashed var(--accent)}.muted{color:var(--muted);font-size:.9rem;text-align:center}.error{color:var(--danger);font-size:.9rem;min-height:1.2em;text-align:center}#game-scene{display:flex;flex-direction:column;padding:0;gap:0;justify-content:flex-start;overflow:hidden}#hud{position:absolute;top:0;left:0;right:0;padding:12px 16px;display:flex;justify-content:space-between;align-items:flex-start;pointer-events:none;z-index:10}.hud-pill{background:#101026d9;border:1px solid rgba(155,155,182,.25);padding:8px 14px;border-radius:999px;font-weight:700;font-size:.95rem;white-space:nowrap;backdrop-filter:blur(4px);-webkit-backdrop-filter:blur(4px)}#boardgame-hud .hud-pill,#othello-hud .hud-pill,#gomoku-hud .hud-pill{font-size:.8rem;padding:6px 10px}.turn-indicator{position:absolute;top:56px;left:50%;transform:translate(-50%);background:var(--accent2);color:#1a1a2e;font-weight:700;padding:6px 14px;border-radius:999px;font-size:.85rem;z-index:10}#game-canvas{flex:1;width:100%;height:100%}#bottom-bar{position:absolute;bottom:0;left:0;right:0;z-index:10;display:flex;flex-direction:column;gap:10px;padding:14px 14px calc(14px + env(safe-area-inset-bottom));background:#101026;border-top:2px solid rgba(107,182,255,.25)}#controls{display:grid;grid-template-columns:1fr 1.4fr 1fr;gap:10px}.ctrl-btn{min-width:0;padding:20px 0;font-size:1.3rem;font-weight:800;border-radius:16px;background:#232342f2;color:var(--text);border:2px solid rgba(155,155,182,.5);touch-action:none;box-shadow:0 2px #0000004d}.ctrl-btn.drop{background:linear-gradient(180deg,#ffc88a 0%,var(--accent) 100%);color:#1a1a2e;border-color:#ffd9a3;box-shadow:0 3px #b8794a,0 0 16px #ffb86b66}.ctrl-btn:active:not(:disabled){transform:translateY(2px);box-shadow:0 1px #0000004d}.ctrl-btn:disabled{opacity:.35}#aux-controls{display:grid;grid-template-columns:1fr 1fr 1fr;gap:10px}.ctrl-mini{min-width:0;padding:10px 0;font-size:1.3rem;font-weight:700;border-radius:12px;background:#232342eb;color:var(--text);border:2px solid rgba(155,155,182,.45);box-shadow:0 2px #0000004d;touch-action:none;pointer-events:auto}.ctrl-mini:active:not(:disabled){transform:translateY(2px);box-shadow:0 1px #0000004d}.ctrl-mini:disabled{opacity:.35}#quit-bar{position:absolute;top:60px;right:16px;z-index:11}.quit-btn{min-width:0;padding:6px 14px;font-size:.85rem;background:#ff5a7ad9;color:#fff;border-radius:999px;font-weight:700}#countdown-overlay{position:absolute;top:0;right:0;bottom:0;left:0;display:flex;align-items:center;justify-content:center;pointer-events:none;z-index:30;background:#1a1a2e40}#countdown-text{font-size:8rem;font-weight:900;color:var(--accent);text-shadow:0 4px 24px rgba(0,0,0,.6);animation:countdown-pop .7s ease-out}@keyframes countdown-pop{0%{transform:scale(.5);opacity:0}30%{transform:scale(1.3);opacity:1}to{transform:scale(1);opacity:1}}#result-overlay{position:absolute;top:0;right:0;bottom:0;left:0;background:#1a1a2eeb;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;padding:24px;z-index:20}.score-line{font-size:1.2rem}.winner-text{font-size:2.4rem;font-weight:800;color:var(--accent);text-align:center}#result-reason{font-size:.85rem}#rematch-status{background:var(--panel);padding:8px 14px;border-radius:8px;font-size:.9rem}#rematch-status.opponent-wants{background:var(--good);color:#1a1a2e;font-weight:700}#rematch-status.opponent-left{background:var(--danger);color:#fff;font-weight:700}#gomoku-hud{position:absolute;top:0;left:0;right:0;padding:12px 16px;display:flex;justify-content:space-between;align-items:flex-start;gap:8px;flex-wrap:wrap;pointer-events:none;z-index:10}#gomoku-wrap{position:absolute;top:68px;right:12px;bottom:12px;left:12px;display:flex;align-items:center;justify-content:center}#gomoku-board{--gomoku-size: 15;display:grid;grid-template-columns:repeat(var(--gomoku-size),1fr);grid-template-rows:repeat(var(--gomoku-size),1fr);width:min(calc(100vw - 24px),calc(100vh - 96px));height:min(calc(100vw - 24px),calc(100vh - 96px));background:#d9b27a;border:4px solid #7a5a36;border-radius:6px;box-shadow:0 6px 24px #0006;position:relative}.gomoku-cell{position:relative;display:flex;align-items:center;justify-content:center;cursor:default;background:transparent;padding:0}.gomoku-cell:before{content:"";position:absolute;left:0;right:0;top:50%;height:1px;margin-top:-.5px;background:#28190ad9;pointer-events:none}.gomoku-cell:after{content:"";position:absolute;top:0;bottom:0;left:50%;width:1px;margin-left:-.5px;background:#28190ad9;pointer-events:none}.gomoku-cell:nth-child(15n+1):before{left:50%}.gomoku-cell:nth-child(15n):before{right:50%}.gomoku-cell:nth-child(-n+15):after{top:50%}.gomoku-cell:nth-last-child(-n+15):after{bottom:50%}.gomoku-star{position:absolute;width:22%;height:22%;max-width:9px;max-height:9px;min-width:5px;min-height:5px;background:#28190ae6;border-radius:50%;pointer-events:none;z-index:1}.gomoku-cell.clickable{cursor:pointer}.gomoku-cell.clickable:hover .gomoku-hover{opacity:.35}.gomoku-hover{position:absolute;width:78%;height:78%;border-radius:50%;background:#fff0;opacity:0;pointer-events:none;z-index:2;transition:opacity .1s}.gomoku-hover.black{background:radial-gradient(circle at 35% 30%,#555,#111 65%,#000)}.gomoku-hover.white{background:radial-gradient(circle at 35% 30%,#fff,#ddd 65%,#aaa)}.gomoku-stone{position:relative;width:78%;height:78%;border-radius:50%;box-shadow:0 2px 3px #00000073;pointer-events:none;z-index:3}.gomoku-stone.black{background:radial-gradient(circle at 35% 30%,#555,#111 65%,#000)}.gomoku-stone.white{background:radial-gradient(circle at 35% 30%,#fff,#ddd 65%,#aaa);border:1px solid #888}.gomoku-stone.green{background:radial-gradient(circle at 35% 30%,#9effb8,#34c759 60%,#1a9c43)}.gomoku-cell.last-move .gomoku-stone{box-shadow:0 0 0 2px #ff5a7a,0 2px 3px #00000073}#gomoku-finish-bar{position:absolute;top:0;left:0;right:0;padding:10px 12px;display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:8px;z-index:11}#gomoku-finish-bar.hidden{display:none}#gomoku-winner{background:#ffb86bf2;color:#1a1a2e;font-weight:800;font-size:1rem}.hud-action{min-width:0;padding:8px 16px;font-size:.9rem;font-weight:700;border-radius:999px;border:none;background:linear-gradient(180deg,#ffc88a 0%,var(--accent) 100%);color:#1a1a2e;cursor:pointer;box-shadow:0 2px #b8794a}.hud-action:active:not(:disabled){transform:translateY(1px);box-shadow:0 1px #b8794a}.hud-action.secondary{background:var(--panel);color:var(--text);border:1px solid var(--muted);box-shadow:0 2px #0000004d}.hud-action:disabled{opacity:.45;cursor:not-allowed}#othello-hud{position:absolute;top:0;left:0;right:0;padding:10px 12px;display:flex;align-items:center;justify-content:space-between;gap:8px;pointer-events:none;z-index:10;flex-wrap:wrap}#othello-hud>*{pointer-events:auto}#othello-finish-bar{position:absolute;top:0;left:0;right:0;padding:10px 12px;display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:8px;z-index:11}#othello-finish-bar.hidden{display:none}#othello-winner{background:#ffb86bf2;color:#1a1a2e;font-weight:800;font-size:1rem}#othello-wrap{position:absolute;top:68px;right:12px;bottom:12px;left:12px;display:flex;align-items:center;justify-content:center}#othello-board{--othello-size: 8;display:grid;grid-template-columns:repeat(var(--othello-size),1fr);grid-template-rows:repeat(var(--othello-size),1fr);width:min(calc(100vw - 24px),calc(100vh - 96px));height:min(calc(100vw - 24px),calc(100vh - 96px));background:#1e7c43;border:4px solid #0d4524;border-radius:6px;box-shadow:0 6px 24px #00000073;position:relative}.othello-cell{position:relative;display:flex;align-items:center;justify-content:center;cursor:default;background:transparent;padding:0;border-right:1px solid rgba(0,0,0,.55);border-bottom:1px solid rgba(0,0,0,.55)}.othello-cell:nth-child(8n){border-right:none}.othello-cell:nth-last-child(-n+8){border-bottom:none}.othello-cell.clickable{cursor:pointer}.othello-cell.last-move{background:#ff5a7a2e}.othello-cell.legal-move:after{content:"";position:absolute;width:24%;height:24%;border-radius:50%;background:#ffffff59;pointer-events:none}.othello-cell.legal-move:hover:after{background:#ffffff8c;width:30%;height:30%}.othello-stone{width:82%;height:82%;border-radius:50%;box-shadow:0 2px 3px #00000073;pointer-events:none;position:relative;z-index:2}.othello-stone.black{background:radial-gradient(circle at 35% 30%,#555,#111 65%,#000)}.othello-stone.white{background:radial-gradient(circle at 35% 30%,#fff,#ddd 65%,#aaa);border:1px solid #888}.othello-stone.green{background:radial-gradient(circle at 35% 30%,#9effb8,#34c759 60%,#1a9c43)}#boardgame-hud{position:absolute;top:0;left:0;right:0;padding:10px 12px;display:flex;align-items:center;justify-content:space-between;gap:6px;pointer-events:none;z-index:10;flex-wrap:wrap}#boardgame-hud>*{pointer-events:auto}#boardgame-hud.hidden{display:none}#boardgame-finish-bar{position:absolute;top:0;left:0;right:0;padding:10px 12px;display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:8px;z-index:11}#boardgame-finish-bar.hidden{display:none}#bg-winner{background:#ffb86bf2;color:#1a1a2e;font-weight:800;font-size:1rem}#boardgame-wrap{position:absolute;top:68px;right:12px;bottom:12px;left:12px;display:flex;align-items:center;justify-content:center}#connect4-board{--c4-cols: 7;--c4-rows: 6;display:grid;grid-template-columns:repeat(var(--c4-cols),1fr);grid-template-rows:repeat(var(--c4-rows),1fr);gap:4px;width:min(calc(100vw - 24px),calc((100vh - 96px) * var(--c4-cols) / var(--c4-rows)));aspect-ratio:var(--c4-cols) / var(--c4-rows);background:#2954c8;border:5px solid #1c3a8c;border-radius:12px;padding:6px;box-shadow:0 6px 24px #00000073}.connect4-cell{position:relative;display:flex;align-items:center;justify-content:center;cursor:default}.connect4-cell.clickable{cursor:pointer}.connect4-disc{width:84%;height:84%;border-radius:50%;background:#16234d;box-shadow:inset 0 2px 6px #0009}.connect4-disc.p1{background:radial-gradient(circle at 35% 30%,#ff8585,#e02b2b 60%,#b01010);box-shadow:0 2px 3px #0006}.connect4-disc.p2{background:radial-gradient(circle at 35% 30%,#ffe680,#f5c518 60%,#c79a00);box-shadow:0 2px 3px #0006}.connect4-disc.p3{background:radial-gradient(circle at 35% 30%,#9effb8,#34c759 60%,#1a9c43);box-shadow:0 2px 3px #0006}.connect4-cell.clickable:hover .connect4-disc.empty{background:#ffffff26}.connect4-cell.last-move .connect4-disc{outline:3px solid #fff;outline-offset:-3px}#dotsboxes-board{--db-cols: 11;--db-rows: 11;display:grid;grid-template-columns:repeat(var(--db-cols),auto);width:min(calc(100vw - 24px),calc(100vh - 96px));height:min(calc(100vw - 24px),calc(100vh - 96px));align-content:center;justify-content:center;align-items:center;justify-items:center}#dotsboxes-board{grid-template-columns:repeat(var(--db-cols),var(--db-cell));grid-template-rows:repeat(var(--db-rows),var(--db-cell));--db-cell: calc(min( calc(100vw - 24px) , calc(100vh - 96px) ) / var(--db-cols))}.db-dot{width:30%;height:30%;border-radius:50%;background:#cfd6f0;align-self:center;justify-self:center}.db-hedge,.db-vedge{background:#ffffff14;border-radius:3px;cursor:default}.db-hedge{width:80%;height:22%}.db-vedge{width:22%;height:80%}.db-hedge.clickable,.db-vedge.clickable{cursor:pointer;background:#ffffff2e}.db-hedge.clickable:hover,.db-vedge.clickable:hover,.db-hedge.drawn,.db-vedge.drawn{background:var(--accent)}.db-box{width:100%;height:100%;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:calc(var(--db-cell) * .5);color:transparent}.db-box.p1{background:#5082ff80;color:#fff}.db-box.p2{background:#ff5a7a80;color:#fff}.db-box.p3{background:#34c75980;color:#fff}#checkers-board{--ck-size: 8;display:grid;grid-template-columns:repeat(var(--ck-size),1fr);grid-template-rows:repeat(var(--ck-size),1fr);width:min(calc(100vw - 24px),calc(100vh - 96px));height:min(calc(100vw - 24px),calc(100vh - 96px));border:4px solid #3a2410;border-radius:6px;box-shadow:0 6px 24px #00000073}.checkers-cell{position:relative;display:flex;align-items:center;justify-content:center}.checkers-cell.light{background:#e8c99a}.checkers-cell.dark{background:#8a5a2b}.checkers-cell.clickable{cursor:pointer}.checkers-cell.selected{box-shadow:inset 0 0 0 4px #6cf09a}.checkers-cell.last-move{box-shadow:inset 0 0 0 3px #ff5a7ab3}.checkers-cell.legal-move:after{content:"";position:absolute;width:30%;height:30%;border-radius:50%;background:#6cf09a99}.checkers-piece{width:76%;height:76%;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:1.1rem;color:gold;box-shadow:0 3px 5px #00000080;position:relative;z-index:2}.checkers-piece.p1{background:radial-gradient(circle at 35% 30%,#555,#222 60%,#000);border:2px solid #000}.checkers-piece.p2{background:radial-gradient(circle at 35% 30%,#fff,#e0e0e0 60%,#b0b0b0);border:2px solid #999}.checkers-piece.king{box-shadow:0 0 0 3px gold,0 3px 5px #00000080}#shogi-area{display:flex;flex-direction:column;align-items:center;gap:8px;width:100%}.shogi-hand{display:flex;flex-wrap:wrap;gap:6px;justify-content:center;min-height:40px;align-items:center}.shogi-hand-chip{background:#ffffff1f;border-radius:8px;padding:4px 8px;font-size:1.4rem;line-height:1;border:2px solid transparent}.shogi-hand-chip.clickable{cursor:pointer}.shogi-hand-chip.clickable:hover{background:#ffffff38}.shogi-hand-chip.selected{border-color:#6cf09a;background:#6cf09a33}#shogi-board{--as-cols: 3;--as-rows: 4;display:grid;grid-template-columns:repeat(var(--as-cols),1fr);grid-template-rows:repeat(var(--as-rows),1fr);width:min(calc(100vw - 48px),calc((100vh - 200px) * var(--as-cols) / var(--as-rows)));aspect-ratio:var(--as-cols) / var(--as-rows);background:#f0d9a8;border:4px solid #5a3a16;border-radius:6px;box-shadow:0 6px 24px #00000073}.shogi-cell{position:relative;display:flex;align-items:center;justify-content:center;border:1px solid #b08a50}.shogi-cell.clickable{cursor:pointer}.shogi-cell.selected{box-shadow:inset 0 0 0 4px #6cf09a}.shogi-cell.last-move{background:#ff5a7a33}.shogi-cell.legal-move:after{content:"";position:absolute;width:26%;height:26%;border-radius:50%;background:#6cf09a8c}.shogi-piece{width:80%;height:80%;display:flex;align-items:center;justify-content:center;font-size:min(9vw,2.6rem);line-height:1;border-radius:6px}.shogi-piece.p1{background:#78b4ff59}.shogi-piece.p2{background:#ff829659}#howto-btn{position:absolute;top:52px;left:8px;z-index:15;min-width:0;padding:6px 14px;font-size:.85rem;font-weight:700;border-radius:999px;background:#6bb6ffeb;color:#1a1a2e;box-shadow:0 2px #0000004d}#ingame-quit-btn{position:absolute;top:92px;left:8px;z-index:15;min-width:0;padding:6px 14px;font-size:.85rem;font-weight:700;border-radius:999px;background:#ff5a7ae6;color:#fff;box-shadow:0 2px #0000004d}#howto-overlay{position:absolute;top:0;right:0;bottom:0;left:0;background:#1a1a2eeb;display:flex;align-items:center;justify-content:center;padding:24px;z-index:40}#howto-card{background:var(--panel);border:1px solid rgba(155,155,182,.4);border-radius:16px;padding:24px;width:100%;max-width:420px;max-height:80%;overflow-y:auto;display:flex;flex-direction:column;gap:14px}#howto-card h2{text-align:center}#howto-body{display:flex;flex-direction:column;gap:10px}#howto-body p{margin:0;font-size:.98rem;line-height:1.5;color:var(--text)}#howto-card button{align-self:center}#setup-host,#setup-guest{display:flex;flex-direction:column;align-items:center;gap:10px;width:100%}#setup-host.hidden,#setup-guest.hidden{display:none}#setup-result{margin-top:14px;font-size:1.3rem;font-weight:800;color:var(--text);min-height:1.6em}#coin{width:96px;height:96px;margin:18px auto 0;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:3rem;background:radial-gradient(circle at 35% 30%,#ffe680,#f5c518 60%,#c79a00);box-shadow:0 4px 10px #00000073}#coin.hidden{display:none}#coin.flipping{animation:coin-flip .35s linear infinite}@keyframes coin-flip{0%{transform:rotateY(0) scale(1)}50%{transform:rotateY(180deg) scale(1.1)}to{transform:rotateY(360deg) scale(1)}}