.withholding-tool { max-width: 920px; }
.withholding-tool .fd-page-header { margin-bottom: 38px; }
.withholding-tool .fd-page-header__title { font-size: clamp(28px, 5vw, 40px); }
.withholding-tool .fd-page-header__lead { max-width: none; }
.withholding-tool .tool-calculation { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; padding: 28px 0 36px; border-block: 1px solid var(--mcp-line); }
.withholding-tool form { display: flex; flex-direction: column; align-items: flex-start; gap: 16px; }
.withholding-tool label { font-weight: 700; }
.withholding-tool input { box-sizing: border-box; width: 100%; padding: 12px 14px; border: 1px solid #64748b; border-radius: 4px; background: #fff; color: var(--mcp-ink); font: inherit; font-size: 22px; }
.withholding-tool input:focus-visible { outline: 2px solid var(--mcp-accent); outline-offset: 3px; }
.withholding-tool .tool-note { margin: 0; color: var(--mcp-muted); font-size: 13px; line-height: 1.8; }
.withholding-tool .tool-result { border-left: 1px solid var(--mcp-line); padding-left: 36px; }
.withholding-tool :is(.tool-result, .tool-breakdown) h2 { margin: 0 0 12px; padding: 0; border: 0; background: none; color: var(--mcp-ink); text-align: left; font-size: 17px; line-height: 1.6; }
.withholding-tool .tool-result__amount { margin: 10px 0 22px; color: var(--mcp-accent); font-variant-numeric: tabular-nums; }
.withholding-tool output { overflow-wrap: anywhere; font-size: clamp(36px, 6vw, 48px); font-weight: 700; }
.withholding-tool .tool-result__amount > span { margin-left: 8px; font-size: 18px; }
.withholding-tool .mcp-button { font: inherit; line-height: 1.6; cursor: pointer; }
.withholding-tool .mcp-button.primary { color: #fff; }
.withholding-tool button:disabled { opacity: .45; cursor: default; }
.withholding-tool #copy-status { display: block; min-height: 24px; margin-top: 8px; }
.withholding-tool section.tool-breakdown { padding: 28px 0; }
.withholding-tool dl { margin: 0 0 10px; }
.withholding-tool dl > div { display: flex; justify-content: space-between; gap: 24px; padding: 10px 0; border-bottom: 1px solid var(--mcp-line); }
.withholding-tool dd { margin: 0; font-variant-numeric: tabular-nums; text-align: right; }
.withholding-tool .tool-next { padding: 20px 0 32px; }
.withholding-tool .tool-next .tool-note { margin-top: 10px; }
.withholding-tool .tool-sources { border-top: 1px solid var(--mcp-line); padding-top: 20px; font-size: 14px; }
.withholding-tool summary { cursor: pointer; font-weight: 600; }
.withholding-tool .tool-sources p { margin: 16px 0 10px; }
.withholding-tool .tool-sources ul { padding-left: 22px; }
.withholding-tool .tool-sources small { color: var(--mcp-muted); }
@media (max-width: 640px) {
  .withholding-tool .tool-calculation { grid-template-columns: 1fr; gap: 26px; }
  .withholding-tool .tool-result { border-left: 0; padding-left: 0; border-top: 1px solid var(--mcp-line); padding-top: 24px; }
  .withholding-tool dl > div { flex-direction: column; gap: 4px; }
  .withholding-tool dd { text-align: left; }
}