:root{--bg: #26282c;--panel: #34373c;--line: #4b4f56;--text: #f1f1f1;--muted: #a9adb4;--accent: #f0b429;--side: 132px}*{box-sizing:border-box}[hidden]{display:none!important}html,body{margin:0;min-height:100%}body{background:var(--bg);color:var(--text);font-family:Hiragino Kaku Gothic ProN,Yu Gothic,Meiryo,sans-serif;line-height:1.6;-webkit-tap-highlight-color:transparent}.game{display:grid;grid-template-columns:minmax(0,1fr) var(--side);grid-template-areas:"stage side" "message side";gap:8px 10px;width:min(1080px,100vw - 20px,(100vh - 100px) * 4 / 3 + var(--side) + 10px);margin:10px auto}.stage{grid-area:stage;position:relative;aspect-ratio:4 / 3;overflow:hidden;border:1px solid var(--line);background:#f2f2f2}.view{position:absolute;inset:0;display:block;width:100%;height:100%;touch-action:none}.view.can-click{cursor:pointer}.inspecting .view{cursor:grab}.nav{position:absolute;width:48px;height:64px;padding:0;border:0;background:none;cursor:pointer}.nav:before{content:"";position:absolute;inset:0;margin:auto;width:0;height:0;border:13px solid transparent;filter:drop-shadow(0 0 1px #fff)}.nav-left{left:0;top:calc(50% - 32px)}.nav-left:before{left:-13px;border-right:20px solid #6a6f78}.nav-right{right:0;top:calc(50% - 32px)}.nav-right:before{right:-13px;border-left:20px solid #6a6f78}.nav-back{left:calc(50% - 32px);bottom:0;width:64px;height:48px}.nav-back:before{bottom:-13px;border-top:20px solid #6a6f78}.nav:hover:before,.nav:focus-visible:before{filter:drop-shadow(0 0 1px #fff) brightness(.6)}.dark .nav:before{filter:brightness(2.2)}.inspecting .nav{display:none}.overlay{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;padding:16px;background:#fffffff0;color:#26282c;text-align:center}.title{margin:0;font-family:Hiragino Mincho ProN,Yu Mincho,MS PMincho,serif;font-size:clamp(1.9rem,7vw,3.4rem);font-weight:400;letter-spacing:.3em;text-indent:.3em}.rooms{position:absolute;inset:0;display:grid;grid-template-columns:repeat(3,1fr)}.room{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;padding:12px;border:0;font:inherit;text-align:center;cursor:pointer}.room-white{background:#fff;color:#26282c}.room-black{background:#0b0b0d;color:#f1f1f1}.room-blue{background:#2458c0;color:#fff}.room .title{font-size:clamp(1.05rem,4vw,2.4rem);letter-spacing:.2em;text-indent:.2em}.room .lead{font-size:clamp(.72rem,1.9vw,.95rem)}.room .level{padding:2px clamp(5px,1.5vw,12px);border:1px solid currentColor;font-size:clamp(.62rem,2.4vw,.8rem);white-space:nowrap}.room:hover .title,.room:focus-visible .title{text-decoration:underline;text-underline-offset:.3em}.room:focus-visible{outline:2px solid var(--accent);outline-offset:-4px}.theme-black .whiteout{background:#000}.theme-black .overlay{background:#000000e6;color:#f1f1f1}.theme-black .overlay-plain{background:none}.theme-black .overlay .howto{color:#a9adb4}.theme-black .btn-primary{border-color:#f1f1f1;background:#f1f1f1;color:#111}.theme-blue .whiteout{background:#1d4fb4}.theme-blue .overlay{background:#1844a0eb;color:#fff}.theme-blue .overlay-plain{background:none}.theme-blue .overlay .howto{color:#c9dafb}.theme-blue .btn-primary{border-color:#fff;background:#fff;color:#173a86}.title-en{font-size:clamp(1.5rem,5.4vw,2.6rem);letter-spacing:.22em;text-indent:.22em}.whiteout{position:absolute;inset:0;background:#fff;opacity:0;pointer-events:none;transition:opacity 1.8s ease-in}.whiteout.on{opacity:1;pointer-events:auto}.overlay-plain{background:none}.lead,.howto{margin:0}.howto{color:#6a6f78;font-size:.82rem}.inspect{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;padding:12px;pointer-events:none}.inspect-name{margin:0;font-size:1.05rem}.inspect-note{margin:0;color:var(--muted);font-size:.8rem}.inspect .btn{margin-top:auto;pointer-events:auto}.btn{padding:6px 14px;border:1px solid var(--line);border-radius:3px;background:var(--panel);color:var(--text);font:inherit;font-size:.9rem;cursor:pointer}.btn:hover:not(:disabled){border-color:var(--muted)}.btn:disabled{color:#74787f;cursor:default}.btn-primary{padding:8px 28px;border-color:#26282c;background:#26282c;color:#fff;font-size:1rem}.btn:focus-visible,.nav:focus-visible,.item:focus-visible{outline:2px solid var(--accent);outline-offset:2px}.message{grid-area:message;min-height:3.4em;margin:0;padding:8px 12px;border:1px solid var(--line);background:#1b1c1f}.side{grid-area:side;display:flex;flex-direction:column;gap:8px}.items{display:grid;grid-template-columns:repeat(2,1fr);gap:6px;margin:0;padding:0;list-style:none}.items li{aspect-ratio:1;border:1px solid var(--line);background:var(--panel)}.item{display:block;width:100%;height:100%;padding:0;border:0;background:none;cursor:pointer}.item img{display:block;width:100%;height:100%}.item[aria-pressed=true]{outline:3px solid var(--accent);outline-offset:-1px}.item-name{min-height:1.6em;margin:0;color:var(--muted);font-size:.82rem;text-align:center}.side-buttons{display:grid;gap:6px}@media(max-width:700px),(max-aspect-ratio:1 / 1){.game{grid-template-columns:minmax(0,1fr);grid-template-areas:"stage" "message" "side";width:min(100vw - 12px,(100vh - 230px) * 4 / 3);min-width:min(100vw - 12px,300px);margin:6px auto}.items{grid-template-columns:repeat(8,1fr);gap:4px}.side-buttons{grid-template-columns:repeat(2,1fr)}.message{font-size:.92rem}}