:root{--bg: #12151c;--surface: #1b2029;--surface-2: #232935;--border: #333c4b;--text: #e8ecf3;--text-dim: #9aa5b6;--accent: #f0b429;--danger: #e5484d;--board-bg: #e5c185;--board-line: #6b4a24;--piece-face: #f6ecd8;--radius: 12px;--shadow: 0 8px 28px rgb(0 0 0 / .35);color-scheme:dark}@media (prefers-color-scheme: light){:root{--bg: #f2f0ea;--surface: #ffffff;--surface-2: #f7f5f0;--border: #ddd7cb;--text: #1f2430;--text-dim: #6b7280;--shadow: 0 6px 20px rgb(0 0 0 / .1);color-scheme:light}}*{box-sizing:border-box}html,body,#root{height:100%}body{margin:0;background:var(--bg);color:var(--text);font-family:Pretendard,-apple-system,BlinkMacSystemFont,Segoe UI,Malgun Gothic,Apple SD Gothic Neo,system-ui,sans-serif;font-size:15px;line-height:1.5;-webkit-text-size-adjust:100%}button{font:inherit;color:inherit}.visually-hidden{position:absolute;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip:rect(0 0 0 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