.math-runner-card{position:relative;display:grid;grid-template-columns:minmax(0,1fr) 40%;width:100%;max-width:680px;min-height:214px;margin:18px 0 22px;overflow:hidden;text-align:left;border:1px solid #ffffffae;border-radius:24px;background:radial-gradient(circle at 75% 16%,#7ae0dd 0,#39b3bb 34%,#16628b 100%);color:white;box-shadow:0 12px 30px #276a8a33;cursor:pointer;font:inherit}.math-runner-card:focus-visible,.math-runner-close:focus-visible{outline:3px solid #ffca66;outline-offset:3px}.math-runner-copy{position:relative;z-index:1;display:flex;flex-direction:column;align-items:flex-start;justify-content:center;gap:3px;padding:20px 8px 22px 24px}.math-runner-kicker{font-size:10px;letter-spacing:.12em;font-weight:800;text-transform:uppercase;color:#c9ffef}.math-runner-copy strong{font-size:clamp(24px,4vw,36px);line-height:1.08;color:#fff;letter-spacing:-.03em}.math-runner-title-th{font-size:16px;font-weight:800;color:#e1fff4}.math-runner-desc{font-size:13px;line-height:1.5;margin:6px 0 10px;color:#e8ffff}.math-runner-cta{display:inline-flex;gap:22px;align-items:center;border-radius:12px;padding:9px 14px;background:#fff7d7;color:#15586e;font-weight:800;font-size:13px}.math-runner-art{overflow:hidden;align-self:stretch;background:transparent}.math-runner-art img{width:100%;height:100%;object-fit:contain;object-position:center bottom;display:block;filter:drop-shadow(0 8px 12px #10495b66)}.math-runner-overlay{position:fixed;inset:0;z-index:99999;background:#132b40;display:flex;flex-direction:column}.math-runner-overlay iframe{display:block;width:100%;flex:1;min-height:0;border:0;background:#102139}.math-runner-close{align-self:flex-end;border:0;padding:10px 20px;color:#153d4e;background:#e9fff7;font:inherit;font-weight:700;cursor:pointer}.math-runner-open{overflow:hidden}@media(max-width:520px){.math-runner-card{min-height:185px;grid-template-columns:minmax(0,1fr) 37%}.math-runner-copy{padding:15px}.math-runner-copy strong{font-size:24px}.math-runner-desc{font-size:12px}}