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0}.section-alt[data-astro-cid-j7pv25f6]{background:var(--color-bg-alt)}.section-title[data-astro-cid-j7pv25f6]{text-align:center;font-size:2rem;font-weight:800;margin-bottom:var(--spacing-sm);color:var(--color-text-bright)}.section-desc[data-astro-cid-j7pv25f6]{text-align:center;color:var(--color-text-light);font-size:1.05rem;margin-bottom:var(--spacing-lg);line-height:2}.problem-grid[data-astro-cid-j7pv25f6]{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--spacing-md);margin-top:var(--spacing-lg)}.problem-card[data-astro-cid-j7pv25f6]{background:var(--color-bg-card);border:1px solid 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