[data-long-division="decimal"] {
  --math-long-division-track: 54px;
  --math-long-division-divisor-track: 40px;
  --math-long-division-gap: 6px;
  display: grid;
  width: min(100%, 560px);
  margin-inline: auto;
  padding: 16px;
  box-sizing: border-box;
  border-radius: 16px;
  background: #f8fbff;
}

[data-long-division-grid="place-value"] {
  display: grid;
  grid-template-columns: var(--math-long-division-divisor-track) repeat(var(--math-long-division-digits), var(--math-long-division-track));
  grid-auto-rows: minmax(44px, auto);
  column-gap: var(--math-long-division-gap);
  row-gap: 4px;
  align-items: center;
  justify-content: center;
  width: max-content;
  max-width: 100%;
  margin-inline: auto;
  font-variant-numeric: tabular-nums;
}

input[data-long-division-role] {
  position: relative;
  z-index: 3;
  justify-self: stretch;
  width: 100% !important;
  min-width: 44px !important;
  min-height: 44px;
  box-sizing: border-box;
  margin: 0;
  padding: 0 4px;
  border: 2px solid #76a8ff;
  border-radius: 10px;
  background: #fff;
  color: #172033;
  font: 900 18px/1 Pretendard, sans-serif;
  text-align: center;
  letter-spacing: 0;
}

[class$="-long-division-digit-group"] {
  position: relative;
  z-index: 3;
  display: grid;
  grid-template-columns: repeat(var(--math-long-division-span), minmax(44px, 1fr));
  gap: var(--math-long-division-gap);
  align-items: center;
}

[class$="-long-division-digit-group"] input { width: 100% !important; }

input[data-long-division-role]:hover { border-color: #3b82f6; }
input[data-long-division-role]:focus-visible {
  outline: 3px solid rgba(37, 99, 235, .28);
  outline-offset: 2px;
  border-color: #2563eb;
}

input[data-long-division-role="partial"] { border-style: dashed; border-color: #8aa8cf; }

span[class*="-long-division-digit"]:not([class*="-group"]),
[class*="-long-division-divisor"] {
  position: relative;
  z-index: 2;
  justify-self: center;
  color: #24344d;
  font: 900 22px/1 Pretendard, sans-serif;
}

[class*="-long-division-divisor"] { justify-self: end; padding-right: 8px; }

[class*="-long-division-bracket"] {
  z-index: 1;
  align-self: stretch;
  margin-top: 2px;
  border-top: 3px solid #334155;
  border-left: 3px solid #334155;
  border-radius: 14px 0 0;
  pointer-events: none;
}

[class*="-long-division-decimal"] {
  z-index: 5;
  align-self: center;
  justify-self: start;
  transform: translateX(calc(-50% - var(--math-long-division-gap) / 2));
  color: #172033;
  font: 950 25px/1 Pretendard, sans-serif;
  pointer-events: none;
}

[class*="-long-division-subtract-line"] {
  z-index: 1;
  align-self: end;
  height: 1px;
  margin-bottom: -2px;
  border-bottom: 2px solid #64748b;
  pointer-events: none;
}

@media (max-width: 480px) {
  [data-long-division="decimal"] {
    --math-long-division-track: 44px;
    --math-long-division-divisor-track: 32px;
    --math-long-division-gap: 8px;
    padding: 12px 0;
  }

  input[data-long-division-role] { font-size: 17px; }
  span[class*="-long-division-digit"]:not([class*="-group"]), [class*="-long-division-divisor"] { font-size: 20px; }
  [class*="-long-division-divisor"] { padding-right: 6px; }
}