:root{font-family:Space Grotesk,Sora,Manrope,Montserrat,Avenir Next,Trebuchet MS,sans-serif;line-height:1.4;font-weight:400;color-scheme:light;--page-bg: #eef1f6;--panel-bg: rgba(255, 255, 255, .78);--toolbar-bg: rgba(255, 255, 255, .72);--text-color: #0c1222;--muted: #5f6a85;--accent-color: #4d6cff;--board-tint: #bdbdbd;--board-frame: #c4c4c4;--board-display: #d9d9d9;--board-border: #7b7b7b;--cell-size: 32px;--ui-scale: 1;--border-soft: rgba(15, 15, 45, .08);--border-strong: rgba(15, 15, 45, .14);--shadow-soft: 0 25px 60px rgba(15, 18, 40, .12)}[data-theme=dark]{color-scheme:dark;--page-bg: #070b14;--panel-bg: rgba(16, 20, 37, .85);--toolbar-bg: rgba(16, 20, 37, .72);--text-color: #f7f9ff;--muted: #9aa2c4;--board-frame: #5f6166;--board-display: #7b7d82;--board-border: #3b3d42;--border-soft: rgba(255, 255, 255, .08);--border-strong: rgba(255, 255, 255, .14);--shadow-soft: 0 30px 65px rgba(0, 0, 0, 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