/* Updated document controls and four-stage research path. */
#research .research-chain { grid-template-columns: repeat(4, minmax(0, 1fr)); }
@media (max-width: 900px) { #research .research-chain { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 560px) { #research .research-chain { grid-template-columns: 1fr; } }