:root{color-scheme:dark;--ink:#eef2e8;--muted:#919b94;--panel:#151a20;--line:#303a3d;--acid:#c8ff3d;--cyan:#54d5dc;--orange:#ff9b4b}*{box-sizing:border-box}html,body,#app{margin:0;width:100%;height:100%;overflow:hidden}body{background:#0a0d12;color:var(--ink);font-family:Noto Sans JP,system-ui,sans-serif}button{font:inherit}.topbar{height:68px;display:flex;align-items:center;gap:28px;padding:0 26px;background:#10151b;border-bottom:1px solid var(--line);position:relative;z-index:5}.brand{display:flex;align-items:center;gap:12px;min-width:220px}.brand-mark{color:#0c1114;background:var(--acid);font:800 17px IBM Plex Mono;padding:9px 8px;transform:skew(-8deg)}.brand b{font:800 19px IBM Plex Mono;letter-spacing:.18em;display:block}.brand small{color:var(--muted);font-size:10px;letter-spacing:.18em}.top-stats{display:flex;gap:24px;flex:1;font:11px IBM Plex Mono;color:var(--muted)}.top-stats b{color:var(--ink);margin-left:6px}.text-button{color:var(--acid);background:transparent;border:1px solid #53602e;padding:8px 12px;cursor:pointer;font-size:12px}.game-shell{position:relative;height:calc(100% - 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