@media (max-width: 880px) {
            .trading-engine-bt-grid { grid-template-columns: 1fr !important; }
            .trading-engine-bt-stats { grid-template-columns: 1fr !important; }
            .trading-engine-bt-numeral-stage { width: 90vw !important; height: 56vw !important; }
            /* Center the inline 1.84 numeral block + caption when
               the 2-col grid collapses on mobile. The hairline rule
               (width: 64) and caption span both pick up margin auto
               via text-align center on the numeral wrapper +
               margin auto on the hairline div. */
            .trading-engine-bt-grid > div:first-child > div:first-child {
              text-align: center !important;
              transform-origin: center center !important;
            }
            .trading-engine-bt-grid > div:first-child > div:first-child > div {
              margin-left: auto !important;
              margin-right: auto !important;
            }
          }