/* Interactive written arithmetic: place-value work row, aligned operands and digit-by-digit answer. */
.paWrittenArithmetic{
  width:min(100%,470px);margin:4px auto 6px;padding:12px 14px 13px;
  border:2px solid #d7b56a;border-radius:16px;
  background:linear-gradient(145deg,#fffdf7,#fff3d5);
  box-shadow:inset 0 1px #fff,0 4px 0 rgba(130,79,16,.13);color:#251808
}
.paWaKicker{margin:0 0 10px;color:#82530e;font-size:10px;font-weight:950;letter-spacing:.035em;text-align:center;text-transform:uppercase}
.paWaForm{display:flex;flex-direction:column;align-items:center;gap:8px}
.paWaStack{display:flex;flex-direction:column;gap:3px;width:100%;font-family:ui-monospace,SFMono-Regular,Consolas,"Liberation Mono",monospace;font-variant-numeric:tabular-nums}
.paWaRow{display:grid;grid-template-columns:58px repeat(var(--pa-wa-cols),minmax(21px,1fr));align-items:center;gap:3px;width:100%;max-width:430px;margin:0 auto}
.paWaRowLabel{display:flex;align-items:center;justify-content:flex-end;min-width:0;padding-right:3px;color:#72502d;font:900 8px/1.1 system-ui,sans-serif;text-align:right}
.paWaPlace{min-width:0;color:#82530e;font:950 8px/1.05 system-ui,sans-serif;text-align:center;text-transform:uppercase;overflow-wrap:anywhere}
.paWaNumberRow{font-size:clamp(20px,5vw,30px);font-weight:950;line-height:1}
.paWaRowLabel .paWaOperator{display:grid;place-items:center;width:100%;min-height:30px;color:#9a5b0d;font:950 23px/1 ui-monospace,SFMono-Regular,Consolas,monospace}
.paWaCell{display:grid;min-width:0;min-height:31px;place-items:center}
.paWaCell.isBlank{opacity:0}
.paWaDecimal{display:grid;place-items:center;color:#9a5b0d;font:950 20px/1 ui-monospace,SFMono-Regular,Consolas,monospace}
.paWaWorkRow{min-height:24px;margin-bottom:1px}
.paWaWorkRow .paWaRowLabel{font-size:7px;color:#946b3b}
.paWaWorkInput{box-sizing:border-box;width:100%;height:23px;min-width:0;padding:0 2px;border:1.5px dashed #d4a34f;border-radius:7px;background:#fffdf8;color:#68410c;text-align:center;font:900 12px/1 ui-monospace,SFMono-Regular,Consolas,monospace}
.paWaWorkInput:focus{outline:2px solid #f3c75b;outline-offset:1px}
.paWaRuleRow{margin:1px auto 3px}
.paWaRuleRow .paWaRowLabel{min-height:2px}
.paWaRule{display:block;grid-column:2/-1;height:3px;border-radius:2px;background:#60401d}
.paWaAnswerRow{margin-top:1px}
.paWaAnswerRow .paWaRowLabel{font-size:9px;color:#71451b}
.paWaDigitInput{box-sizing:border-box;width:100%;height:39px;min-width:0;padding:0;border:2px solid #d58b28;border-radius:8px;background:#fff;color:#172e50;text-align:center;font:950 22px/1 ui-monospace,SFMono-Regular,Consolas,monospace;caret-color:#c94e66;box-shadow:0 2px 0 #ecd6ae}
.paWaDigitInput:focus,.paWaDivisionInput:focus{outline:3px solid #e75070;outline-offset:1px;border-color:#e75070}
.paWaSubmit{min-width:138px;min-height:38px;padding:7px 18px;border:2px solid #17335b;border-radius:11px;background:linear-gradient(#2c78a0,#155477);box-shadow:0 3px 0 #10284a;color:#fff;font:900 14px/1 system-ui,sans-serif;cursor:pointer;touch-action:manipulation}
.paWaSubmit:disabled{opacity:.7;cursor:default}
.paWaStatus{min-height:12px;color:#596a82;font:700 9px/1.25 system-ui,sans-serif;text-align:center}
.paWaDivision{display:grid;grid-template-columns:auto minmax(120px,auto);grid-template-rows:42px auto;justify-content:center;align-items:end;font:950 clamp(25px,7vw,38px)/1.1 ui-monospace,SFMono-Regular,Consolas,monospace}
.paWaQuotient{grid-column:2;grid-row:1;display:flex;align-items:center;gap:7px;padding:0 8px 4px;color:#9a5b0d}
.paWaDivisionInput{box-sizing:border-box;width:min(150px,55vw);height:38px;border:2px solid #d58b28;border-radius:8px;background:#fff;color:#172e50;text-align:center;font:950 22px/1 ui-monospace,SFMono-Regular,Consolas,monospace}
.paWaDividend{grid-column:2;grid-row:2;min-width:120px;padding:7px 10px 5px;border-top:3px solid #7a4d12;border-left:3px solid #7a4d12;border-radius:9px 0 0 0;letter-spacing:.06em}
#segelDemo .paWrittenArithmetic{margin:0 auto;background:linear-gradient(145deg,#fffefa,#fff4d9)}
#segelDemo .paWaKicker{font-size:9px}
#segelDemo .paWaRow{grid-template-columns:58px repeat(var(--pa-wa-cols),minmax(22px,1fr))}
#segelDemo .paWaSubmit{border-color:#10284a;background:linear-gradient(#244c7d,#17345b);box-shadow:0 3px 0 #0d1f3d}
@media(max-width:390px){
 .paWrittenArithmetic{padding:10px 8px 11px}
 .paWaRow,#segelDemo .paWaRow{grid-template-columns:48px repeat(var(--pa-wa-cols),minmax(19px,1fr));gap:2px}
 .paWaRowLabel{font-size:7px;padding-right:2px}
 .paWaPlace{font-size:7px}
 .paWaWorkInput{height:21px}
 .paWaDigitInput{height:36px;font-size:19px}
}
@media(prefers-reduced-motion:reduce){.paWaDigitInput,.paWaSubmit{scroll-behavior:auto}}

/* Mobile quotient action stays alongside the answer, never below the soft keyboard. */
.paWrittenArithmetic--division .paWaDivision{
  grid-template-columns:auto minmax(82px,auto) auto;
  column-gap:5px;
  align-items:end;
  max-width:100%;
}
.paWrittenArithmetic--division .paWaQuotient{grid-column:1 / 3;grid-row:1;gap:5px;padding:0 0 4px}
.paWrittenArithmetic--division .paWaDivisionInput{width:clamp(76px,24vw,120px);min-width:0;max-width:100%}
.paWrittenArithmetic--division .paWaDivisionSubmit{
  grid-column:3;grid-row:1;min-width:64px;min-height:38px;
  padding:8px 10px;margin-bottom:4px;white-space:nowrap;
}
.paWrittenArithmetic--division .paWaDividend{grid-column:2;grid-row:2;min-width:90px}
@media(max-width:390px){
  .paWrittenArithmetic--division .paWaDivision{column-gap:3px}
  .paWrittenArithmetic--division .paWaQuotient{gap:3px}
  .paWrittenArithmetic--division .paWaDivisionSubmit{min-width:58px;padding:8px 7px;font-size:12px}
}