@font-face {
  font-family: "Public Sans";
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url("/assets/fonts/public-sans-latin-400-normal.woff2") format("woff2");
}

@font-face {
  font-family: "Public Sans";
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url("/assets/fonts/public-sans-latin-500-normal.woff2") format("woff2");
}

@font-face {
  font-family: "Public Sans";
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url("/assets/fonts/public-sans-latin-600-normal.woff2") format("woff2");
}

@font-face {
  font-family: "Source Serif 4";
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url("/assets/fonts/source-serif-4-latin-600-normal.woff2") format("woff2");
}

:root {
  color-scheme: light;
  --paper: #F5F0E6;
  --sheet: #FCFAF5;
  --ink: #14213D;
  --ink-2: #34415A;
  --ink-3: #414B60;
  --rule: #D8CDB8;
  --rule-strong: #82745C;
  --plus: #174B38;
  --minus: #84291F;
  --shadow-1: rgb(20 33 61 / 8%);
  --shadow-2: rgb(20 33 61 / 6%);
  --serif: "Source Serif 4", Georgia, serif;
  --sans: "Public Sans", Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scrollbar-color: var(--rule-strong) var(--paper);
  text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 1.1875rem;
  line-height: 1.6;
  overflow-wrap: anywhere;
}

::selection {
  background: var(--ink);
  color: var(--paper);
}

a {
  color: var(--ink);
  text-underline-offset: 0.2em;
}

a:hover {
  color: var(--plus);
}

:focus-visible {
  outline: 2px solid var(--ink);
  outline-offset: 2px;
}

.site-header {
  position: static;
  top: 0;
  z-index: 10;
  background: color-mix(in srgb, var(--paper) 94%, white);
  border-bottom: 1px solid var(--rule);
}

.header-inner,
main,
.footer-inner {
  width: min(1120px, calc(100% - 32px));
  margin-inline: auto;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: baseline;
  gap: 0.45rem;
  flex: 0 1 auto;
  color: var(--ink);
  font-family: var(--serif);
  font-size: 1.25rem;
  font-weight: 600;
  line-height: 1;
  text-decoration: none;
}

.brand span:last-child {
  color: var(--ink-2);
  font-family: var(--sans);
  font-size: 1.1875rem;
  font-weight: 600;
}

.main-nav-wrap {
  position: relative;
  min-width: 0;
}

.main-nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: start;
  gap: 18px;
}

.main-nav a {
  flex: 0 1 auto;
  border-bottom: 2px solid transparent;
  color: var(--ink);
  font-size: 1.1875rem;
  font-weight: 500;
  line-height: 1.4;
  padding-block: 0.35rem;
  text-decoration: none;
}

.main-nav a[aria-current="page"] {
  border-color: var(--ink);
}

main {
  padding-block: 42px 72px;
}

h1,
h2,
h3 {
  color: var(--ink);
  font-family: var(--serif);
  font-weight: 600;
  line-height: 1.12;
  margin: 0;
  text-wrap: balance;
}

h1 {
  font-size: 2.5rem;
  letter-spacing: -0.02em;
}

h2 {
  font-size: 1.9rem;
}

p {
  margin: 0;
}

.hero {
  border-bottom: 1px solid var(--rule);
  padding-block: 30px 42px;
}

.hero h1 {
  max-width: 880px;
}

.hero p {
  max-width: 760px;
  margin-top: 18px;
  color: var(--ink-2);
  font-weight: 500;
}

.tool-index {
  margin-block: 30px 44px;
  border-top: 1px solid var(--rule-strong);
}

.tool-row {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr) minmax(0, 140px);
  align-items: center;
  gap: 20px;
  min-height: 88px;
  padding: 16px 24px;
  border-bottom: 1px solid var(--rule);
  color: var(--ink);
  text-decoration: none;
}

.tool-row strong {
  font-family: var(--serif);
  font-size: 1.35rem;
  font-weight: 600;
  line-height: 1.15;
}

.tool-row span {
  color: var(--ink-2);
}

.content-band {
  max-width: 68ch;
  padding-block: 14px;
}

.content-band h1 {
  margin-bottom: 18px;
}

.content-band h2 {
  margin-bottom: 12px;
}

.content-band p + p {
  margin-top: 14px;
}

.calculator {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 0.9fr);
  gap: 28px;
  align-items: start;
}

.calculator-panel > p {
  max-width: 66ch;
  margin-top: 14px;
  color: var(--ink-2);
}

.form-sheet {
  display: grid;
  gap: 16px;
  margin-top: 24px;
  padding: 24px;
  background: var(--sheet);
  border: 1px solid var(--rule);
  border-radius: 6px;
}

.form-help,
.form-error {
  margin: 0;
  color: var(--ink-2);
  font-size: 1.1875rem;
  line-height: 1.5;
}

.form-error {
  font-weight: 600;
}

label {
  display: grid;
  gap: 7px;
  color: var(--ink);
  font-size: 1.0625rem;
  font-weight: 600;
  line-height: 1.6;
}

input,
select {
  width: 100%;
  min-height: 56px;
  border: 1px solid var(--rule-strong);
  border-radius: 6px;
  background: #fffefb;
  color: var(--ink);
  caret-color: var(--ink);
  font: 500 1.1875rem/1.4 var(--sans);
  padding: 0 20px;
}

select {
  appearance: none;
  background-image:
    linear-gradient(45deg, transparent 50%, var(--ink) 50%),
    linear-gradient(135deg, var(--ink) 50%, transparent 50%);
  background-position:
    calc(100% - 18px) 20px,
    calc(100% - 13px) 20px;
  background-size: 5px 5px, 5px 5px;
  background-repeat: no-repeat;
  padding-right: 36px;
}

input:focus,
select:focus {
  outline: 2px solid var(--ink);
  outline-offset: 2px;
}

input[type="checkbox"] {
  width: 24px;
  height: 24px;
  min-height: 24px;
  padding: 0;
  accent-color: var(--ink);
}

.check {
  grid-template-columns: 24px minmax(0, 1fr);
  align-items: center;
  gap: 10px;
  min-height: 56px;
  padding-block: 8px;
}

.field-unit {
  position: relative;
  display: block;
}

.field-unit input {
  padding-right: 62px;
}

.field-unit > span {
  position: absolute;
  top: 50%;
  right: 20px;
  transform: translateY(-50%);
  color: var(--ink-2);
  font-size: 1.1875rem;
  font-weight: 600;
  pointer-events: none;
}

.receipt {
  position: static;
  top: 96px;
  display: block;
  overflow: hidden;
  padding: 24px 24px 28px;
  background:
    linear-gradient(var(--sheet), var(--sheet)) padding-box,
    radial-gradient(circle at 12px calc(100% + 7px), transparent 12px, var(--rule) 13px, var(--rule) 14px, transparent 15px) 0 0 / 24px 100% border-box;
  border: 1px solid var(--rule);
  border-bottom: 0;
  border-radius: 6px 6px 0 0;
  box-shadow: 0 1px 2px var(--shadow-1), 0 8px 24px var(--shadow-2);
}

.receipt::after {
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  height: 12px;
  background: radial-gradient(circle at 12px 13px, var(--paper) 0 8px, transparent 8.5px) 0 0 / 24px 12px repeat-x;
  content: "";
}

.receipt-heading {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  border-bottom: 1px solid var(--rule);
  color: var(--ink);
  font-size: 1.1875rem;
  font-weight: 600;
  padding-bottom: 10px;
}

.receipt-heading span {
  color: var(--ink-2);
}

.receipt-total-amount {
  display: inline-block;
  width: fit-content;
  color: var(--plus);
  font-family: var(--serif);
  font-size: 2.5rem;
  font-variant-numeric: tabular-nums;
  font-weight: 600;
  line-height: 1;
  letter-spacing: -0.02em;
}

.receipt-total-amount.is-updated {
  animation: receipt-flash 600ms ease-out;
}

.receipt > dl {
  display: grid;
  margin: 16px 0 0;
}

.receipt-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) fit-content(45%);
  align-items: end;
  gap: 10px;
  min-height: 31px;
  color: var(--ink);
  font-size: 1.1875rem;
}

.receipt-row dt {
  display: flex;
  align-items: end;
  gap: 8px;
  min-width: 0;
  color: var(--ink-2);
  font-weight: 500;
}

.receipt-row dt span {
  min-width: 0;
}

.receipt-row dt::after {
  flex: 1;
  min-width: 8px;
  margin-bottom: 0.4em;
  border-bottom: 1px dotted var(--rule-strong);
  content: "";
}

.receipt-row dd {
  min-width: 0;
  margin: 0;
  font-variant-numeric: tabular-nums;
  font-weight: 600;
  text-align: right;
}

.receipt-row.is-plus dd {
  color: var(--plus);
}

.receipt-row.is-minus dd {
  color: var(--minus);
}

.receipt-row.is-subtotal {
  border-top: 1px solid var(--rule-strong);
  margin-top: 8px;
  padding-top: 8px;
}

.receipt-row.is-total {
  grid-template-columns: minmax(0, 1fr);
  gap: 8px;
  border-top: 3px double var(--rule-strong);
  margin-top: 16px;
  padding-top: 18px;
}

.receipt-row.is-total dt {
  justify-content: flex-end;
  font-size: 1.1875rem;
  font-weight: 600;
  text-align: right;
}

[hidden] {
  display: none !important;
}

a,
button,
summary {
  touch-action: manipulation;
}

a {
  display: inline-block;
  max-width: 100%;
  min-width: 48px;
  min-height: 48px;
  padding-block: 8px;
}

button,
.tool-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 56px;
  border: 2px solid var(--ink);
  border-radius: 6px;
  padding: 12px 20px;
  background: var(--ink);
  color: var(--sheet);
  font: 600 1.1875rem/1.4 var(--sans);
  text-align: center;
  cursor: pointer;
}

button:hover,
.tool-row:hover .tool-action {
  background: var(--ink-2);
  color: var(--sheet);
}

.secondary-button {
  background: var(--sheet);
  color: var(--ink);
}

.nav-toggle,
.print-data {
  display: none;
}

.calculator > *,
.form-field,
input,
select,
.guide,
.footer-inner > * {
  min-width: 0;
}

.form-sheet {
  gap: 24px;
}

.form-field {
  display: grid;
  gap: 8px;
}

.field-help,
.field-error,
.form-help,
.form-error {
  font-size: 1.1875rem;
  font-weight: 400;
  line-height: 1.6;
}

.field-help {
  color: var(--ink-2);
}

.field-error,
.form-error {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  color: var(--minus);
  font-weight: 600;
}

.field-error svg,
.form-error svg {
  flex: 0 0 24px;
  margin-top: 4px;
}

[aria-invalid="true"] {
  border: 2px solid var(--minus);
}

.example-notice,
.guide-summary {
  padding: 16px;
  border: 1px solid var(--rule-strong);
  border-radius: 6px;
  background: var(--paper);
}

summary {
  min-height: 48px;
  padding-block: 8px;
}

.term-help {
  margin-top: 8px;
  font-size: 1.1875rem;
  font-weight: 400;
  line-height: 1.6;
}

.term-help summary {
  font-weight: 500;
}

.term-name {
  display: block;
  font-weight: 600;
}

.term-help p {
  color: var(--ink-2);
}

.term-help dl,
.receipt-glossary dl {
  margin: 8px 0 0;
}

.term-help dt,
.receipt-glossary dt {
  font-weight: 600;
}

.term-help dd,
.receipt-glossary dd {
  margin: 0;
  color: var(--ink-2);
}

.term-help dd + dt,
.receipt-glossary dd + dt {
  margin-top: 12px;
}

.receipt-glossary {
  margin-top: 16px;
  border-top: 1px solid var(--rule);
}

.receipt-heading {
  font-family: var(--sans);
  font-size: 1.5rem;
  line-height: 1.4;
  scroll-margin-top: 24px;
}

.receipt-row {
  padding-block: 10px;
  border-bottom: 1px dotted var(--rule);
  align-items: end;
}

.receipt-row.is-total {
  border-bottom: 0;
}

.receipt > .result-sentence {
  font-size: 1.1875rem;
  line-height: 1.6;
  color: var(--ink);
  font-weight: 600;
}

.print-button,
.calculate-button {
  width: 100%;
  margin-top: 8px;
}

.tool-action {
  color: var(--sheet) !important;
}

.guide-summary {
  margin-bottom: 24px;
}

.guide-summary h2 {
  margin-top: 0;
}

.guide-summary p + p {
  margin-top: 8px;
}

.guide-glossary {
  margin-bottom: 24px;
}

.home-glossary {
  margin-top: 24px;
}

.brand {
  flex-wrap: wrap;
  line-height: 1.4;
}

.main-nav a,
.footer-inner a,
.guide-index a {
  min-height: 48px;
  padding-block: 10px;
}

.main-nav {
  gap: 8px 16px;
}

.review {
  border-radius: 6px;
}

.receipt-row.is-total dt::after {
  display: none;
}

.receipt > p {
  margin-top: 16px;
  color: var(--ink-2);
  font-size: 1.1875rem;
  line-height: 1.45;
}

.ad-slot {
  display: flex;
  min-height: 280px;
  align-items: flex-start;
  justify-content: center;
  margin-block: 34px;
  padding-top: 10px;
  border: 1px dashed var(--rule);
  background: color-mix(in srgb, var(--sheet) 62%, transparent);
  border-radius: 6px;
}

.ad-slot span {
  color: var(--ink-2);
  font-size: 1.1875rem;
  font-weight: 600;
}

.guide-shell {
  display: grid;
  grid-template-columns: minmax(0, 210px) minmax(0, 68ch);
  gap: 42px;
  align-items: start;
  margin-top: 48px;
}

.guide-index {
  position: static;
  top: 96px;
  border-left: 1px solid var(--rule);
  padding-inline: 20px;
}

.guide-index details {
  padding: 0;
}

.guide-index summary {
  color: var(--ink);
  font-size: 1.1875rem;
  font-weight: 600;
}

.guide-index ol {
  display: grid;
  gap: 8px;
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
}

.guide-index a {
  color: var(--ink-2);
  font-size: 1.1875rem;
  line-height: 1.35;
  text-decoration: none;
}

.guide-index a:hover {
  color: var(--ink);
  text-decoration: underline;
}

.guide {
  max-width: 68ch;
}

.guide-title-row {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-top: 0;
}

.guide h2 {
  margin-top: 44px;
  margin-bottom: 14px;
}

.guide-title-row h2 {
  margin-top: 0;
}

.review {
  flex: 0 1 auto;
  border: 1px solid var(--rule);
  border-radius: 999px;
  color: var(--ink-2);
  font-size: 1.1875rem;
  font-weight: 600;
  line-height: 1.2;
  padding: 7px 20px;
}

.guide p + p,
.guide p + h2 {
  margin-top: 18px;
}

.guide p {
  color: var(--ink);
}

.example-table {
  width: 100%;
  border-collapse: collapse;
  margin: 4px 0 20px;
  font-size: 1.1875rem;
  font-variant-numeric: tabular-nums;
}

.example-table th,
.example-table td {
  border-bottom: 1px solid var(--rule);
  padding: 9px 20px;
  text-align: left;
  vertical-align: top;
}

.example-table th {
  color: var(--ink-2);
  font-size: 1.1875rem;
  font-weight: 600;
}

.example-table td:not(:first-child),
.example-table th:not(:first-child) {
  text-align: right;
}

.guide-note {
  border-top: 1px solid var(--rule);
  margin-top: 28px;
  padding-top: 14px;
  color: var(--ink-2) !important;
  font-size: 1.1875rem;
}

.faq-list {
  border-top: 1px solid var(--rule);
}

.faq-list details {
  border-bottom: 1px solid var(--rule);
  padding: 16px 24px;
}

summary {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 18px;
  gap: 16px;
  align-items: center;
  color: var(--ink);
  cursor: pointer;
  font-weight: 600;
  list-style: none;
}

summary::-webkit-details-marker {
  display: none;
}

summary::after {
  width: 18px;
  height: 18px;
  background: url("data:image/svg+xml,%3Csvg viewBox='0 0 18 18' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M9 4v10M4 9h10' stroke='%2314213D' stroke-width='1.8' stroke-linecap='round'/%3E%3C/svg%3E") center / 18px 18px no-repeat;
  content: "";
}

details[open] summary::after {
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 18 18' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M4 9h10' stroke='%2314213D' stroke-width='1.8' stroke-linecap='round'/%3E%3C/svg%3E");
}

details p {
  margin-top: 10px;
  color: var(--ink-2);
}

.source-list {
  display: grid;
  gap: 10px;
  margin: 0;
  padding-left: 1.1rem;
}

.source-list a {
  display: inline-grid;
  gap: 1px;
  color: var(--ink);
  font-weight: 600;
}

.source-list span {
  color: var(--ink-2);
  font-size: 1.1875rem;
  font-weight: 500;
}

.site-footer {
  background: var(--ink);
  color: var(--paper);
  padding-block: 34px;
}

.footer-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 18px 28px;
  align-items: start;
}

.footer-inner strong {
  font-family: var(--serif);
  font-size: 1.2rem;
  font-weight: 600;
}

.footer-inner p {
  max-width: 64ch;
  margin-top: 6px;
  color: color-mix(in srgb, var(--paper) 82%, white);
  font-size: 1.1875rem;
}

.footer-inner nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: end;
  gap: 10px 16px;
}

.footer-inner a {
  color: var(--paper);
  font-size: 1.1875rem;
}

.footer-inner > a {
  grid-column: 1 / -1;
  width: fit-content;
}

@keyframes receipt-flash {
  0% {
    background: color-mix(in srgb, var(--plus) 10%, transparent);
  }
  100% {
    background: transparent;
  }
}

@media (min-width: 960px) {
  h1 {
    font-size: 3.25rem;
  }

  .ad-slot {
    min-height: 250px;
  }
}

@media (max-width: 959px) {
  .header-inner {
    display: grid;
    gap: 10px;
    padding-block: 14px 10px;
  }

  .main-nav {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    width: 100%;
    padding-bottom: 4px;
    padding-right: 0;
  }

  .main-nav-wrap[data-ready] .nav-toggle {
    display: flex;
    width: 100%;
  }

  .main-nav-wrap[data-ready] .nav-toggle[aria-expanded="false"] + .main-nav {
    display: none;
  }

  .main-nav a {
    padding: 12px 16px;
    min-height: 56px;
    border: 1px solid var(--rule-strong);
    border-radius: 6px;
    background: var(--sheet);
  }

  .main-nav a[aria-current="page"] {
    border: 2px solid var(--ink);
    text-decoration: underline;
  }

  .main-nav {
    margin-top: 8px;
  }

  .main-nav-wrap {
    width: 100%;
  }


  main {
    padding-block: 30px 52px;
  }

  .calculator,
  .guide-shell {
    grid-template-columns: minmax(0, 1fr);
  }

  .guide-shell > * {
    min-width: 0;
  }

  .receipt,
  .guide-index {
    position: static;
  }

  .form-sheet,
  .receipt,
  .faq-list details {
    padding-inline: 16px;
  }

  input,
  select {
    padding-left: 16px;
  }

  input {
    padding-right: 16px;
  }

  .field-unit > span {
    right: 16px;
  }

  .review {
    width: fit-content;
    padding-inline: 16px;
  }

  .guide-index {
    border-left: 0;
    border-block: 1px solid var(--rule);
    padding: 16px;
  }

  .tool-row {
    grid-template-columns: minmax(0, 1fr);
    gap: 10px 14px;
    min-height: 102px;
    padding: 16px;
  }

  .tool-row span {
    grid-column: 1;
  }

  .tool-action {
    width: 100%;
  }

  .guide-title-row,
  .footer-inner {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
  }

  .footer-inner nav {
    justify-content: start;
  }

  .example-table,
  .example-table tbody,
  .example-table tr,
  .example-table td {
    display: block;
    width: 100%;
  }

  .example-table thead {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip-path: inset(50%);
  }

  .example-table tr {
    border-bottom: 2px solid var(--rule-strong);
    margin-bottom: 20px;
  }

  .example-table td::before {
    display: block;
    content: attr(data-label);
    color: var(--ink-2);
    font-weight: 600;
  }

  .example-table td:not(:first-child) {
    text-align: left;
  }

  .example-table th,
  .example-table td {
    padding-inline: 16px;
  }
}

@media (max-width: 520px) {
  .header-inner,
  main,
  .footer-inner {
    width: min(100% - 32px, 1120px);
  }

  h1 {
    font-size: 2.5rem;
  }

  .receipt-total-amount {
    font-size: 2.25rem;
  }

  .receipt-row,
  .receipt-row.is-total dt {
    font-size: 1rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}

@media print {
  @page {
    margin: 16mm;
  }

  body {
    background: white;
    color: var(--ink);
    font-size: 12pt;
  }

  .site-header,
  .site-footer,
  main > :not(.calculator),
  .calculator-panel,
  .print-button,
  .receipt-glossary {
    display: none !important;
  }

  main {
    width: 100%;
    padding: 0;
  }

  .calculator {
    display: block;
  }

  .print-data {
    display: block;
    margin-bottom: 24px;
  }

  .print-data h1 {
    font-size: 24pt;
    margin-bottom: 12px;
  }

  .print-data h2 {
    font-size: 16pt;
    margin-top: 16px;
  }

  .print-data dl > div {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 12px;
    padding-block: 6px;
    border-bottom: 1px solid var(--rule);
    break-inside: avoid;
  }

  .print-data dd {
    margin: 0;
  }

  .receipt {
    position: static;
    overflow: visible;
    background: white;
    border: 1px solid var(--rule-strong);
    border-radius: 0;
    box-shadow: none;
    padding: 16px;
  }

  .receipt::after {
    display: none;
  }

  .receipt-row {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    font-size: 12pt;
    break-inside: avoid;
  }

  .receipt-row.is-total {
    grid-template-columns: minmax(0, 1fr);
  }

  .receipt-heading,
  .receipt-total-amount {
    font-size: 20pt;
  }

  .receipt > p {
    font-size: 12pt;
  }
}