/* ── Rav Explanation Highlights (CSS Custom Highlight API) ── */
::highlight(rav-identify)  { background-color: rgba(254, 219, 0, 0.45); }
::highlight(rav-connect)   { background-color: rgba(144, 205, 250, 0.45); }
::highlight(rav-confirm)   { background-color: rgba(246, 153, 223, 0.45); }
::highlight(rav-extend)    { background-color: rgba(134, 239, 172, 0.45); }
::highlight(rav-eliminate) { background-color: rgba(239, 68, 68, 0.2); }
::highlight(rav-active)    { background-color: rgba(254, 219, 0, 0.65); }

/* ── IELTS Writing Error Highlights ── */
::highlight(rav-error-grammar)    { text-decoration: underline wavy 2px #ef4444; }
::highlight(rav-error-vocabulary) { text-decoration: underline wavy 2px #f59e0b; }
::highlight(rav-error-structure)  { text-decoration: underline 2px #3b82f6; }