/* Reverse Color — exact colors from fred.measurements.md. */
html.reverse {
  --item-bg: #000; --item-fg: #FCFCFC; --box-bg: #090909; --box-border: #CCC;
  --nav-bg: #333; --nav-row: #444; --nav-fg: #FCFCFC;
  --nav-current-bg: rgb(162, 221, 255); --nav-current-fg: #000;
  --hdr-bg: rgb(5, 31, 113);
  --labs-bg: #000; --labs-fg: #FCFCFC; --labs-line: #AAB; --labs-field-bg: #000; --labs-field-line: #FCFCFC;
  --labs-tab-bg: #444; --labs-tab-active: #111; --labs-tab-line: #AAB;
  --hl: #6b6b00;
}
html.reverse .answerbox .options li.struck .text { opacity: 0.6; }

/* Text Zoom: small / medium / large, line-height 1.4 (driver values). */
html.zoom-small { --item-size: 16px; }
html.zoom-medium { --item-size: 24px; }
html.zoom-large { --item-size: 35.2px; }