/* DELTA-SIERRA MARS — Tools index hubs only — RC3 2026-09-21 */
/* DS TOOLS INDEX HUB RC2 2026-09-21 */
html#ds-mars-root body.ds-tools-index-page .mars-portal-main{max-width:1180px}
html#ds-mars-root body.ds-tools-index-page .ds-tools-hub-section{padding:1.1rem}
html#ds-mars-root body.ds-tools-index-page .ds-tools-hub-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1rem}
html#ds-mars-root body.ds-tools-index-page .ds-tools-hub-card{display:flex;min-width:0;min-height:190px;flex-direction:column;padding:1.1rem;border:1px solid #cbd8e5;border-radius:14px;background:linear-gradient(180deg,#fff,#f6f9fc);color:#173a5c;text-decoration:none;box-shadow:0 8px 22px rgba(20,50,78,.07);transition:transform .18s ease,border-color .18s ease,box-shadow .18s ease}
html#ds-mars-root body.ds-tools-index-page .ds-tools-hub-card:hover,html#ds-mars-root body.ds-tools-index-page .ds-tools-hub-card:focus-visible{transform:translateY(-3px);border-color:#2b79b7;box-shadow:0 13px 28px rgba(20,50,78,.14);outline:3px solid rgba(43,121,183,.18);outline-offset:2px}
html#ds-mars-root body.ds-tools-index-page .ds-tools-hub-card h3{margin:0 0 .65rem;color:#123b61;font-size:1.08rem;line-height:1.25}
html#ds-mars-root body.ds-tools-index-page .ds-tools-hub-card p{margin:0 0 1rem;color:#455f76;line-height:1.55;flex:1}
html#ds-mars-root body.ds-tools-index-page .ds-tools-hub-card span{font-weight:850;color:#0b5f9e}
@media(max-width:980px){html#ds-mars-root body.ds-tools-index-page .ds-tools-hub-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:620px){html#ds-mars-root body.ds-tools-index-page .ds-tools-hub-grid{grid-template-columns:1fr}html#ds-mars-root body.ds-tools-index-page .ds-tools-hub-card{min-height:0}}

/* RC4 — skip-link proof closure: hidden outside keyboard focus, visible and fixed on focus. */
body.ds-tools-index-page .skip-link:not(:focus):not(:focus-visible){visibility:hidden!important;}
body.ds-tools-index-page .skip-link:focus,body.ds-tools-index-page .skip-link:focus-visible{visibility:visible!important;}

/* RC4 — visited-state closure for tool cards. */
html#ds-mars-root body.ds-tools-index-page .ds-tools-hub-card:visited{color:#173a5c!important;-webkit-text-fill-color:#173a5c!important;}