:root{--font-main:"Outfit", -apple-system, BlinkMacSystemFont, sans-serif;--font-title:"Cinzel", serif;--font-piece:"Noto Serif TC", serif;--bg-dark:#0a0806;--bg-surface:#14100c;--bg-card:#1c1611d9;--bg-glass:#241c16b3;--border-gold:#d4af3759;--border-gold-glow:#d4af37cc;--gold-primary:#d4af37;--gold-light:#fbe285;--gold-dark:#8c6d1f;--red-piece-bg:radial-gradient(circle at 35% 30%, #fef3c7 0%, #ecd09f 35%, #be9459 75%, #785324 100%);--red-text:#b91c1c;--red-glow:#dc262699;--black-piece-bg:radial-gradient(circle at 35% 30%, #3e322a 0%, #261e18 40%, #15110d 80%, #090705 100%);--black-text:#fef08a;--black-glow:#fef08a66;--board-wood:#2a1a10;--board-surface:#dfb175;--board-grid:#5a381e;--board-river:#d6a86b66;--shadow-xl:0 25px 50px -12px #000000bf;--shadow-gold:0 0 20px #d4af3759;--shadow-red:0 0 25px 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