:root{--text:#6b6375;--text-h:#08060d;--bg:#fff;--border:#e5e4e7;--code-bg:#f4f3ec;--accent:#aa3bff;--accent-bg:#aa3bff1a;--accent-border:#aa3bff80;--social-bg:#f4f3ec80;--shadow:#0000001a 0 10px 15px -3px, #0000000d 0 4px 6px -2px;--sans:system-ui, "Segoe UI", Roboto, sans-serif;--heading:system-ui, "Segoe UI", Roboto, sans-serif;--mono:ui-monospace, Consolas, monospace;font:18px/145% var(--sans);letter-spacing:.18px;--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light dark;color:var(--text);background:var(--bg);font-synthesis:none;text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}@media (prefers-color-scheme:dark){:root{--lightningcss-light: ;--lightningcss-dark:initial}}@media (width<=1024px){:root{font-size:16px}}@media (prefers-color-scheme:dark){:root{--text:#9ca3af;--text-h:#f3f4f6;--bg:#16171d;--border:#2e303a;--code-bg:#1f2028;--accent:#c084fc;--accent-bg:#c084fc26;--accent-border:#c084fc80;--social-bg:#2f303a80;--shadow:#0006 0 10px 15px -3px, #00000040 0 4px 6px -2px}#social .button-icon{filter:invert()brightness(2)}}body{margin:0}#root{text-align:center;border-inline:1px solid var(--border);box-sizing:border-box;flex-direction:column;width:1126px;max-width:100%;min-height:100svh;margin:0 auto;display:flex}h1,h2{font-family:var(--heading);color:var(--text-h);font-weight:500}h1{letter-spacing:-1.68px;margin:32px 0;font-size:56px}@media (width<=1024px){h1{margin:20px 0;font-size:36px}}h2{letter-spacing:-.24px;margin:0 0 8px;font-size:24px;line-height:118%}@media (width<=1024px){h2{font-size:20px}}p{margin:0}code,.counter{font-family:var(--mono);color:var(--text-h);border-radius:4px;display:inline-flex}code{background:var(--code-bg);padding:4px 8px;font-size:15px;line-height:135%}.app{isolation:isolate;--sq:clamp(34px, 11vw, 56px);flex-direction:column;align-items:center;padding:32px 16px 48px;display:flex;position:relative;overflow-x:hidden}.app:before{content:"";background:radial-gradient(closest-side, var(--accent-bg), transparent);z-index:-1;pointer-events:none;width:min(640px,100vw);height:320px;position:absolute;top:-80px;left:50%;transform:translate(-50%)}.title-row{align-items:center;gap:10px;margin-bottom:24px;display:flex}.title-icon{width:34px;height:34px;color:var(--accent)}.app h1{letter-spacing:-1px;color:var(--text-h);margin:0;font-size:clamp(28px,8vw,42px);font-weight:700}.game-panel{background:linear-gradient(180deg, var(--code-bg), var(--bg));border:1px solid var(--border);width:min(560px,100%);box-shadow:var(--shadow);border-radius:20px;flex-direction:column;align-items:center;padding:clamp(14px,4vw,22px) clamp(12px,4vw,24px) clamp(18px,5vw,28px);display:flex}.controls{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:10px;width:100%;margin-bottom:18px;display:flex}.difficulty-picker{background:var(--bg);border:1px solid var(--border);border-radius:999px;gap:2px;padding:3px;display:inline-flex}.difficulty-btn{color:var(--text);cursor:pointer;white-space:nowrap;background:0 0;border:none;border-radius:999px;padding:7px 12px;font-size:12.5px;font-weight:600;transition:background .15s,color .15s}.difficulty-btn:hover:not(.active){background:var(--accent-bg)}.difficulty-btn.active{background:var(--accent);color:#fff;box-shadow:0 2px 8px var(--accent-bg)}.how-to-play{border:1px solid var(--border);background:var(--bg);color:var(--text-h);cursor:pointer;border-radius:999px;align-items:center;gap:6px;padding:8px 14px;font-size:13px;font-weight:600;transition:border-color .15s,background .15s,transform .1s;display:inline-flex}.how-to-play:hover{background:var(--accent-bg);border-color:var(--accent-border)}.how-to-play:active{transform:scale(.97)}.rules-overlay{-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px);z-index:10;background:#0000008c;justify-content:center;align-items:center;padding:16px;display:flex;position:fixed;inset:0}.rules-panel{background:var(--bg);color:var(--text);border:1px solid var(--border);text-align:left;max-width:480px;max-height:80vh;box-shadow:var(--shadow);border-radius:16px;padding:28px 32px;overflow-y:auto}.rules-panel h2{color:var(--text-h);margin-bottom:14px;font-size:24px}.rules-panel p{color:var(--text);margin-bottom:13px;font-size:15px;line-height:150%}.rules-panel strong{color:var(--accent)}.close-rules{background:var(--accent);color:#fff;cursor:pointer;border:none;border-radius:999px;margin-top:10px;padding:10px 22px;font-weight:600;transition:opacity .15s,transform .1s}.close-rules:hover{opacity:.9}.close-rules:active{transform:scale(.97)}.status{color:var(--text-h);background:var(--bg);border:1px solid var(--border);text-align:center;border-radius:999px;align-items:center;gap:9px;min-height:16px;margin-bottom:20px;padding:9px 20px;font-size:14px;font-weight:600;display:inline-flex}.status.thinking:before{content:"";background:var(--accent);border-radius:50%;flex-shrink:0;width:8px;height:8px;animation:1s ease-in-out infinite pulse-dot}.status.your-move:before{content:"";background:#2f8f4e;border-radius:50%;flex-shrink:0;width:8px;height:8px}.status.win:before{content:"";background:#d4af37;border-radius:50%;flex-shrink:0;width:8px;height:8px}@keyframes pulse-dot{0%,to{opacity:1;transform:scale(1)}50%{opacity:.35;transform:scale(.7)}}.error{color:#e5484d;text-align:center;margin-bottom:12px;font-size:14px}.board-frame{background:linear-gradient(135deg, var(--accent), #d4af37);border-radius:16px;padding:4px;box-shadow:0 14px 34px #00000059}.board{border-radius:12px;flex-direction:column;display:inline-flex;overflow:hidden}.board-row{display:flex}.rank-label{width:clamp(16px,4.5vw,24px);min-width:clamp(16px,4.5vw,24px);color:var(--text);background:var(--code-bg);justify-content:center;align-items:center;font-size:clamp(9px,2.5vw,11.5px);font-weight:600;display:flex}.file-label{width:var(--sq);min-width:var(--sq);color:var(--text);justify-content:center;align-items:center;font-size:clamp(9px,2.5vw,11.5px);font-weight:600;display:flex}.file-labels{background:var(--code-bg);padding-top:4px}.square{width:var(--sq);height:var(--sq);cursor:pointer;touch-action:manipulation;border:none;justify-content:center;align-items:center;padding:0;transition:filter .1s;display:flex;position:relative}.square:hover{filter:brightness(1.1)}.square.light{background:linear-gradient(155deg,#f2ecdf,#e4dac5);box-shadow:inset 0 0 10px #785a2814}.square.dark{background:linear-gradient(155deg,#c6a374,#a3805a);box-shadow:inset 0 0 10px #00000026}.square.fortress{animation:2.4s ease-in-out infinite fortress-glow;box-shadow:inset 0 0 0 3px #d4af37e6}.square.fortress:after{content:"";pointer-events:none;border:1px dashed #d4af3799;border-radius:4px;position:absolute;inset:9px}@keyframes fortress-glow{0%,to{box-shadow:inset 0 0 0 3px #d4af37e6}50%{box-shadow:inset 0 0 0 3px #d4af378c,0 0 10px #d4af3759}}.square.selected{box-shadow:inset 0 0 0 3px #2f8f4e,0 0 14px #2f8f4e8c}.square.fog{box-shadow:inset 0 0 16px #281e0a47}.square.fog:hover{filter:brightness(1.15)}.cloud-icon{width:calc(var(--sq) * .82);height:calc(var(--sq) * .82);overflow:visible}.piece-icon{filter:drop-shadow(0 3px 4px #00000073);transition:transform .12s}.square:hover .piece-icon{transform:scale(1.08)}.piece-icon-S{width:calc(var(--sq) * .54);height:calc(var(--sq) * .54)}.piece-icon-R{width:calc(var(--sq) * .68);height:calc(var(--sq) * .68)}.piece-icon-G{width:calc(var(--sq) * .86);height:calc(var(--sq) * .86)}.dot{background:#2f8f4ebf;border-radius:50%;width:14px;height:14px;animation:1.4s ease-in-out infinite pulse-dot}.captured{min-height:18px;color:var(--text);margin-top:16px;font-size:12.5px;font-weight:500}.new-game{background:linear-gradient(135deg, var(--accent), #b56cff);color:#fff;cursor:pointer;box-shadow:0 6px 16px var(--accent-bg);border:none;border-radius:999px;align-items:center;gap:8px;margin-top:22px;padding:12px 26px;font-size:15px;font-weight:700;transition:transform .12s,box-shadow .12s;display:inline-flex}.new-game:hover{box-shadow:0 8px 20px var(--accent-bg);transform:translateY(-2px)}.new-game:active{transform:translateY(0)}