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(width<=767px){.page-container.rules-page{padding-inline:16px}}.page-container.rules-page[data-game=math-chess]{--math-panel:var(--glass);--math-inset:oklch(0% 0 0/.18);--math-blue:oklch(62% .14 245);--math-red:oklch(64% .18 25);gap:28px;max-width:1240px;container:math-rules-page/inline-size}.math-rules-hero{background:var(--math-panel);border:1px solid var(--border);box-shadow:var(--glass-edge);border-radius:36px;grid-template-columns:minmax(0,1fr);align-items:center;gap:28px;padding:36px 40px 24px;display:grid}.math-rules-intro{flex-direction:column;gap:20px;min-width:0;display:flex}.math-rules-kicker{color:var(--accent-warm);text-transform:uppercase;letter-spacing:.07em;align-items:center;gap:12px;font-size:12px;font-weight:700;line-height:1.5;display:flex}.math-rules-kicker .rules-game-icon{border-radius:16px;flex:none;width:52px;height:52px;font-family:Georgia,serif;font-size:30px}.math-rules-hero 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