/* Sin reglas de color para la guía, la actividad inicial ni sus botones. */
#conceptMaster.v63-guide .concept-cols{display:grid!important;grid-template-columns:minmax(0,1fr) minmax(0,1.2fr);align-items:start}
#conceptMaster.v63-guide .concept-definition{display:block!important;line-height:1.75}
#conceptMaster.v63-guide .concept-block{min-width:0}
#conceptMaster.v63-guide #conceptParts{padding-left:19px}
#conceptMaster.v63-guide #conceptSteps{padding-left:23px}
#conceptMaster.v63-guide #conceptSteps>li{padding-left:4px;margin-bottom:22px}
#conceptMaster.v63-guide .v63-step-math{font-size:1.08em;font-weight:700;line-height:1.9;margin:8px 0;overflow-x:auto;max-width:100%}
#conceptMaster.v63-guide .v63-explanation{line-height:1.65;margin:8px 0}
#conceptMaster.v63-guide .v63-section{margin-top:20px;padding-top:14px;border-top:1px solid var(--line)}
#conceptMaster.v63-guide .v63-section h4{margin:0 0 9px}
#conceptMaster.v63-guide .v63-example{margin:12px 0 18px;line-height:1.8;font-weight:700}
#conceptMaster.v63-guide details{margin-top:12px;line-height:1.7}
#conceptMaster.v63-guide summary{cursor:pointer;font-weight:700;line-height:1.6}
#conceptMaster.v63-guide .v63-check{margin:12px 0;padding:10px 0;border-bottom:1px solid var(--line)}
#conceptMaster.v63-guide .v63-check .choice{margin-top:7px;font-size:14px;line-height:1.55;padding:10px;min-height:42px}
#conceptMaster.v63-guide .v63-check .choices{display:grid;grid-template-columns:1fr;gap:4px}
#conceptMaster.v63-guide .v63-check-feedback{margin-top:10px;line-height:1.65}
.n62-frac{display:inline-flex;flex-direction:column;vertical-align:middle;align-items:center;margin:0 .18em;line-height:1.1;text-align:center;white-space:nowrap}
.n62-frac>span:first-child{border-bottom:1.6px solid currentColor;padding:0 .16em .13em}
.n62-frac>span:last-child{padding:.13em .16em 0}
.v63-matrix{display:inline-flex;flex-direction:column;border-left:2px solid currentColor;border-right:2px solid currentColor;padding:4px 12px;line-height:1.7}
#v63PaperItems{line-height:1.8}
#v63PaperItems li{display:block;margin:14px 0}
#v63PaperItems .v63-paper-q{overflow-x:auto;max-width:100%}
body.v63-review #reviewModeBtn{display:inline-flex!important;pointer-events:none}
body.v63-review #reviewModeBtn:after{content:' · V63'}
body.v63-review .review-notice{display:none!important}
@media(max-width:760px){#conceptMaster.v63-guide .concept-cols{grid-template-columns:1fr}#conceptMaster.v63-guide .v63-step-math{font-size:1em}}

body.v63-review #toolpanel:not(.open){visibility:hidden;pointer-events:none}

#kidLab .v63-inline-math{display:inline-block;max-width:100%;line-height:1.7;text-align:center}
#kidLab .v63-inline-math sup{font-size:.65em;vertical-align:super;line-height:0}