[hidden] {
  display: none !important;
}
.print-only {
  display: none;
}
@media print {
  input:focus {
    outline: none !important;
    box-shadow: none !important;
    caret-color: transparent;
  }
  .print-only {
    display: block !important;
    font-size: 9pt;
    line-height: 1.5;
    color: #222 !important;
    margin-top: 16px;
  }
}
@media (max-width: 700px) {
  html:not(.js-ready) .site-header {
    flex-wrap: wrap;
  }
  html:not(.js-ready) .site-nav {
    display: flex;
    position: static;
    width: 100%;
    flex-wrap: wrap;
    background: transparent;
    border: 0;
    gap: 8px 20px;
  }
  html:not(.js-ready) .menu-button {
    display: none;
  }
  html:not(.js-ready) .site-nav a {
    padding: 7px 0;
    min-height: 42px;
    border: 0;
  }
}
.site-frame {
  width: min(calc(100% - 72px), 1400px);
  margin-inline: auto;
}
.header-band {
  background: var(--night);
}
.site-header {
  min-height: 80px;
}
.site-nav {
  gap: 34px;
}
.site-nav a {
  min-height: 48px;
}
.link-arrow {
  width: 26px;
  height: 26px;
  flex: 0 0 26px;
}
.home-hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  padding: 54px 0 62px;
  align-items: center;
  min-height: 610px;
}
.home-intro h1 {
  max-width: 10.8ch;
  margin: 0;
  font-size: clamp(56px, 6.1vw, 88px);
  line-height: 0.99;
  letter-spacing: -0.065em;
  font-weight: 800;
  text-wrap: balance;
}
.home-intro > p {
  max-width: 38ch;
  margin: 25px 0 0;
  font-size: 24px;
  line-height: 1.5;
  color: var(--ice);
}
.hero-actions {
  display: flex;
  align-items: center;
  gap: 28px;
  flex-wrap: wrap;
  margin-top: 34px;
}
a.primary-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 56px;
  text-decoration: none;
  padding: 14px 24px;
  line-height: 1.4;
}
.underlined-action {
  font-weight: 700;
  line-height: 1.5;
  padding-block: 12px;
  text-decoration-thickness: 1px;
}
.topic-list h2 {
  margin: 0 0 18px;
  font-size: 34px;
  line-height: 1.15;
  letter-spacing: -0.04em;
}
.topic-row {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr) 26px;
  gap: 18px;
  align-items: center;
  min-height: 96px;
  padding: 17px 0;
  border-top: 1px solid var(--line-bright);
  text-decoration: none;
  transition:
    color 0.18s,
    background 0.18s;
}
.topic-row:last-of-type {
  border-bottom: 1px solid var(--line-bright);
}
.row-number {
  color: var(--cyan);
  font-family: "IBM Plex Mono", monospace;
  font-size: 25px;
  letter-spacing: -0.06em;
}
.topic-row strong {
  display: block;
  font-size: 22px;
  line-height: 1.25;
  letter-spacing: -0.025em;
}
.topic-row small,
.tool-row small {
  display: block;
  margin-top: 6px;
  font-size: 14px;
  line-height: 1.45;
  color: var(--muted-dark);
}
.topic-row:hover,
.tool-row:hover {
  color: var(--cyan);
}
.caution {
  padding-top: 14px;
  border-top: 3px solid var(--amber);
  color: var(--amber);
  font-size: 14px;
  line-height: 1.5;
  font-weight: 700;
}
.topic-list > .caution {
  margin: 24px 0 0;
}
.paper-band,
.footer-band {
  background: var(--paper);
  color: var(--ink);
}
.home-tools {
  display: grid;
  grid-template-columns: 0.85fr 1.45fr;
  gap: 64px;
  padding-block: 54px;
}
.home-tools > h2 {
  margin: 0;
  font-size: clamp(40px, 4.2vw, 64px);
  line-height: 1.05;
  letter-spacing: -0.055em;
}
.home-tools > div {
  border-left: 1px solid var(--line-light);
  padding-left: 48px;
}
.tool-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
  padding: 22px 0;
  border-bottom: 1px solid var(--line-light);
  text-decoration: none;
}
.tool-row:first-child {
  padding-top: 0;
}
.tool-row:last-child {
  border-bottom: 0;
}
.tool-row strong {
  font-size: 27px;
  font-weight: 800;
  letter-spacing: -0.035em;
  line-height: 1.2;
}
.paper-band .tool-row small {
  color: var(--muted-light);
  font-size: 16px;
}
.paper-band .tool-row:hover,
.reading-page .tool-row:hover {
  color: #0056d8;
}
.home-principles {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 100px;
  padding-block: 70px;
}
.home-principles h2 {
  margin: 0;
  font-size: 44px;
  line-height: 1.08;
  letter-spacing: -0.045em;
}
.home-principles p {
  max-width: 50ch;
  color: var(--ice);
  font-size: 17px;
  line-height: 1.65;
}
.action-link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  line-height: 1.5;
  padding-block: 10px;
  color: var(--cyan);
}
.principle-list {
  list-style: none;
  margin: 0;
  padding: 0;
}
.principle-list li {
  display: flex;
  gap: 24px;
  padding: 18px 0;
  border-top: 1px solid var(--line-dark);
}
.principle-list li > span {
  font-family: "IBM Plex Mono", monospace;
  color: var(--cyan);
  font-size: 20px;
}
.principle-list h3 {
  margin: 0;
  font-size: 22px;
}
.principle-list p {
  margin: 6px 0 0;
  font-size: 15px;
}
.site-footer {
  display: grid;
  grid-template-columns: 1.1fr 0.8fr 1fr;
  align-items: start;
  gap: 40px;
  padding: 30px 0 38px;
  border: 0;
  box-shadow: none;
  clip-path: none;
  font-size: 12px;
  line-height: 1.65;
}
.site-footer .wordmark {
  display: inline-block;
  color: var(--ink);
  font-size: 23px;
  margin-bottom: 10px;
}
.site-footer .wordmark span {
  color: #0056d8;
}
.site-footer nav {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 8px;
  font-weight: 700;
}
.site-footer a {
  min-height: 30px;
  display: inline-flex;
  align-items: center;
}
.reading-page {
  background: var(--paper);
  background-image: none;
  color: var(--ink);
}
.reading-page .site-header,
.reading-page .site-header .wordmark {
  color: var(--white);
}
.page-heading {
  padding: 42px 0 34px;
}
.page-heading h1 {
  margin: 0;
  max-width: 25ch;
  font-size: clamp(42px, 4.6vw, 68px);
  font-weight: 800;
  letter-spacing: -0.055em;
  line-height: 1.04;
  text-wrap: balance;
}
.page-heading > p {
  margin: 17px 0 0;
  max-width: 70ch;
  font-size: 23px;
  color: var(--ice);
  line-height: 1.5;
}
.reading-page .page-heading > p {
  color: var(--muted-light);
}
.breadcrumbs {
  display: flex;
  gap: 14px;
  align-items: center;
  padding-top: 28px;
  font-size: 14px;
  color: var(--muted-light);
}
.article-heading {
  padding-top: 25px;
  padding-bottom: 32px;
}
.reading-layout {
  display: grid;
  grid-template-columns: minmax(0, 2.2fr) minmax(260px, 1fr);
  gap: 54px;
  align-items: start;
  padding-bottom: 60px;
}
.article-body {
  min-width: 0;
  max-width: 840px;
}
.article-body > section {
  padding: 30px 0;
  border-top: 1px solid var(--line-light);
  scroll-margin-top: 24px;
}
.article-body h2 {
  margin: 0 0 16px;
  font-size: clamp(26px, 2.45vw, 34px);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1.2;
  text-wrap: balance;
}
.article-body p,
.article-body li {
  font-size: 17px;
  line-height: 1.75;
  color: #415a70;
  overflow-wrap: anywhere;
}
.article-body p {
  margin: 13px 0;
}
.article-body a,
.reading-note a {
  color: #0056d8;
}
.article-body strong {
  color: var(--ink);
}
.contents {
  display: flex;
  flex-wrap: wrap;
  gap: 9px 18px;
  padding: 0 0 24px;
  font-size: 12px;
  line-height: 1.5;
}
.contents > span {
  width: 100%;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-family: "IBM Plex Mono", monospace;
  color: var(--muted-light);
}
.contents > a {
  color: #345268;
  min-height: 28px;
  display: inline-flex;
  align-items: center;
}
.reading-aside {
  position: sticky;
  top: 28px;
  padding: 25px 0 0 34px;
  border-left: 1px solid var(--line-light);
  border-top: 1px solid var(--line-light);
}
.reading-aside h2 {
  margin: 0 0 18px;
  font-size: 27px;
  line-height: 1.2;
  letter-spacing: -0.04em;
}
.reading-aside p,
.reading-aside li {
  font-size: 15px;
  line-height: 1.7;
  color: #415a70;
}
.reading-aside .action-link {
  display: flex;
  justify-content: center;
  min-height: 52px;
  padding: 12px 18px;
  background: var(--cyan);
  color: #031326;
  text-decoration: none;
  border-radius: 6px;
  font-size: 15px;
}
.reading-aside .caution {
  color: #795000;
  font-size: 14px;
  line-height: 1.65;
}
.aside-secondary {
  display: inline-flex;
  margin-top: 16px;
  font-size: 13px;
  color: #0056d8;
  min-height: 30px;
  align-items: center;
}
.scenario-spec {
  background: #e4f2f8;
  padding: 18px 20px;
  margin: 0 0 18px;
}
.scenario-spec > div {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 9px 0;
  font-family: "IBM Plex Mono", monospace;
  font-size: 13px;
}
.scenario-spec dt {
  color: var(--muted-light);
}
.scenario-spec dd {
  margin: 0;
  font-weight: 700;
  color: var(--ink);
}
.article-steps {
  padding-left: 25px;
}
.article-steps > li {
  padding-left: 7px;
  margin: 15px 0;
}
.article-steps > li::marker {
  color: #00778f;
  font-weight: 800;
}
.plain-list {
  padding-left: 22px;
}
.plain-list li {
  margin: 12px 0;
}
.table-scroll {
  max-width: 100%;
  overflow-x: auto;
}
.reading-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 15px;
  text-align: left;
  margin: 20px 0;
}
.reading-table th,
.reading-table td {
  padding: 17px 16px;
  border-bottom: 1px solid var(--line-light);
  vertical-align: top;
  line-height: 1.6;
}
.reading-table thead {
  background: #e6f0f6;
}
.reading-table tbody th {
  width: 30%;
  font-weight: 700;
}
.reading-table th:first-child,
.reading-table td:first-child {
  padding-left: 0;
}
.reading-table thead th:first-child {
  padding-left: 16px;
}
.reference-list {
  margin: 0;
  padding: 0;
  list-style: none;
}
.reference-list li {
  padding: 13px 0;
  border-bottom: 1px solid var(--line-light);
}
.reference-list li > a {
  font-size: 15px;
  font-weight: 800;
  color: #0056d8;
}
.reference-list li > p {
  margin: 4px 0 0;
  font-size: 13px;
  line-height: 1.6;
  color: var(--muted-light);
}
.review-date {
  font-size: 12px !important;
  color: var(--muted-light);
  line-height: 1.6;
}
.related-reading {
  padding: 30px 0 45px;
  border-top: 1px solid var(--line-light);
}
.related-reading h2 {
  font-size: 30px;
  letter-spacing: -0.04em;
  margin: 0 0 26px;
}
.reading-page .tool-row small {
  color: var(--muted-light);
}
.guide-directory {
  max-width: 1040px;
  padding-bottom: 30px;
}
.guide-directory .topic-row {
  min-height: 130px;
  border-color: var(--line-light);
}
.guide-directory .topic-row strong {
  font-size: 28px;
}
.guide-directory .topic-row small {
  color: var(--muted-light);
  font-size: 17px;
  max-width: 65ch;
}
.guide-directory .row-number {
  color: #007f9c;
}
.reading-note {
  max-width: 900px;
  padding: 20px 0 55px;
}
.reading-note h2 {
  font-size: 28px;
}
.reading-note p {
  font-size: 18px;
  line-height: 1.7;
  color: var(--muted-light);
}
.decision-tool {
  padding: 22px;
  border: 1px solid #b4cfdd;
  background: #eaf3f8;
  margin: 24px 0;
}
.decision-tool label {
  display: block;
  font-weight: 800;
  margin-bottom: 12px;
}
select {
  font:
    600 15px/1.5 Manrope,
    system-ui,
    sans-serif;
  max-width: 100%;
  min-height: 48px;
  border: 1px solid #73a9c2;
  border-radius: 6px;
  padding: 10px 34px 10px 12px;
  background: #09223b;
  color: var(--white);
}
.decision-tool select {
  width: 100%;
  background: var(--paper);
  color: var(--ink);
}
.decision-result {
  padding-top: 20px;
}
.decision-result h3 {
  font-size: 21px;
  line-height: 1.35;
  margin: 0 0 10px;
}
.sheet-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 40px;
  padding-bottom: 42px;
  align-items: start;
}
.sheet-layout form {
  min-width: 0;
}
.sheet-controls {
  display: flex;
  flex-wrap: wrap;
  align-items: end;
  gap: 20px;
  padding-bottom: 22px;
}
.sheet-controls > label,
.sheet-meta > label {
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 13px;
  font-weight: 700;
  line-height: 1.5;
}
.sheet-controls .checkbox-label {
  flex-direction: row;
  align-items: center;
  min-height: 48px;
  gap: 9px;
}
.checkbox-label input {
  width: 20px;
  height: 20px;
  accent-color: var(--cyan);
}
.sheet-table {
  width: 100%;
  border: 1px solid #7198ac;
}
.sheet-table-head,
.tire-row {
  display: grid;
  grid-template-columns: 1.05fr 1.25fr 1.25fr 1fr;
  align-items: center;
  gap: 15px;
  padding: 14px 17px;
}
.sheet-table-head {
  background: #e4f2f8;
  color: var(--ink);
  font-weight: 800;
  font-size: 13px;
  line-height: 1.5;
}
.tire-row {
  border-top: 1px solid #7198ac;
  min-height: 79px;
}
.tire-row > h2 {
  margin: 0;
  font-size: 17px;
  line-height: 1.25;
  font-weight: 700;
  letter-spacing: -0.025em;
}
.tire-row > label {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 8px;
  align-items: center;
  font-size: 12px;
}
.tire-row input {
  width: 100%;
  min-width: 0;
  height: 45px;
  border: 1px solid #7ea8be;
  border-radius: 6px;
  background: #071b30;
  color: var(--white);
  padding: 8px 10px;
  font-size: 17px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}
.tire-row input[aria-invalid="true"] {
  border-color: var(--error);
  outline: 1px solid var(--error);
}
.tire-difference {
  font-family: "IBM Plex Mono", monospace;
  font-size: 12px;
  line-height: 1.6;
  overflow-wrap: anywhere;
  color: var(--ice);
}
.mobile-field-label {
  display: none;
}
.sheet-meta {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 22px;
  padding-top: 24px;
}
.sheet-meta input {
  width: 100%;
  min-height: 48px;
  border: 1px solid #7ea8be;
  border-radius: 6px;
  padding: 10px 12px;
  background: #09223b;
  color: var(--white);
  font-size: 14px;
  color-scheme: dark;
}
.sheet-meta input::placeholder {
  color: #a7bfd0;
}
.sheet-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  padding-top: 24px;
}
.sheet-actions .primary-button {
  padding: 14px 24px;
}
.secondary-button {
  min-height: 52px;
  padding: 12px 20px;
  border: 1px solid #7ea8be;
  border-radius: 6px;
  background: transparent;
  color: var(--white);
  font-weight: 700;
  font-size: 14px;
  cursor: pointer;
}
.secondary-button:hover {
  border-color: var(--cyan);
  background: #0a2942;
}
.sheet-aside {
  padding-left: 28px;
  border-left: 1px solid var(--line-bright);
}
.sheet-aside h2 {
  margin: 0;
  font-size: 29px;
  letter-spacing: -0.04em;
  line-height: 1.2;
}
.sheet-aside .article-steps {
  color: var(--ice);
  font-size: 15px;
  line-height: 1.6;
}
.sheet-aside li::marker {
  color: var(--cyan);
}
.sheet-summary {
  display: grid;
  grid-template-columns: 0.7fr 1.3fr;
  gap: 50px;
  padding-block: 36px;
}
.sheet-summary > h2 {
  margin: 0;
  font-size: 43px;
  letter-spacing: -0.05em;
  line-height: 1.12;
}
.sheet-summary p {
  margin: 0;
  font-size: 18px;
  line-height: 1.7;
}
.sheet-summary ul {
  padding-left: 20px;
  font-size: 16px;
  line-height: 1.7;
}
.sheet-sources {
  padding-block: 30px;
}
.sheet-sources .reference-list li {
  border-color: var(--line-dark);
}
.sheet-sources .reference-list a {
  color: var(--cyan);
}
.sheet-sources .reference-list p,
.sheet-sources .review-date {
  color: var(--muted-dark);
}
.sheet-error {
  padding: 12px 15px;
  border: 1px solid var(--error);
  color: #ffaea8;
  font-size: 14px;
  line-height: 1.5;
}
.comparison-table-section {
  padding: 32px 0;
  border-top: 1px solid var(--line-bright);
}
.comparison-table-section h2 {
  font-size: 32px;
  letter-spacing: -0.04em;
  margin: 0;
}
.comparison-table-section > p {
  max-width: 80ch;
  color: var(--ice);
  font-size: 15px;
  line-height: 1.7;
}
.comparison-table-section .reading-table th,
.comparison-table-section .reading-table td {
  border-color: var(--line-dark);
}
.comparison-table-section .reading-table thead {
  background: #0b2a44;
  color: var(--white);
}
.comparison-table-section a {
  color: var(--cyan);
  margin-right: 18px;
}
.calc-related {
  padding: 28px 0 40px;
  border-top: 1px solid var(--line-light);
  color: var(--ink);
  background: var(--paper);
  box-shadow: 0 0 0 100vmax var(--paper);
  clip-path: inset(0 -100vmax);
}
.calc-related .tool-row small {
  color: var(--muted-light);
}
.calc-related .tool-row strong {
  font-size: 22px;
}
@media (max-width: 1150px) {
  .site-nav {
    gap: 22px;
  }
  .home-hero {
    gap: 40px;
  }
  .home-intro h1 {
    font-size: 66px;
  }
  .hero-actions {
    gap: 15px;
  }
  .home-intro > p {
    font-size: 21px;
  }
  .topic-list h2 {
    font-size: 29px;
  }
  .topic-row {
    grid-template-columns: 38px 1fr 24px;
    gap: 12px;
  }
  .topic-row strong {
    font-size: 20px;
  }
  .reading-layout {
    grid-template-columns: minmax(0, 1fr) 280px;
    gap: 35px;
  }
  .sheet-layout {
    grid-template-columns: minmax(0, 1fr);
    gap: 25px;
  }
  .sheet-aside {
    border: 0;
    padding: 20px 0 0;
    display: grid;
    grid-template-columns: 0.6fr 1fr;
    gap: 20px;
  }
  .sheet-aside .caution {
    margin: 0;
  }
  .sheet-aside .article-steps {
    margin: 0;
    grid-row: span 2;
  }
  .sheet-aside .action-link {
    grid-column: 1/-1;
  }
}
@media (max-width: 850px) {
  .site-frame {
    width: calc(100% - 40px);
  }
  .home-hero {
    grid-template-columns: 1fr;
    padding: 40px 0;
    gap: 40px;
  }
  .home-intro h1 {
    max-width: 14ch;
    font-size: 68px;
  }
  .home-intro > p {
    max-width: 44ch;
  }
  .home-tools {
    gap: 30px;
    grid-template-columns: 1fr 1.4fr;
  }
  .home-tools > div {
    padding-left: 25px;
  }
  .home-principles {
    gap: 40px;
  }
  .reading-layout {
    grid-template-columns: 1fr;
  }
  .reading-aside {
    position: static;
    border-left: 0;
    border-top: 2px solid #abc7d6;
    padding: 25px 0;
  }
  .reading-aside .action-link {
    max-width: 360px;
  }
  .site-footer {
    grid-template-columns: 1fr 1fr;
  }
  .site-footer > p {
    grid-column: 1/-1;
  }
  .page-heading h1 {
    font-size: 52px;
  }
  .page-heading > p {
    font-size: 20px;
  }
  .article-body {
    max-width: none;
  }
}
@media (max-width: 700px) {
  .site-frame {
    width: calc(100% - 32px);
  }
  .site-header {
    min-height: 64px;
  }
  .home-hero {
    padding-top: 35px;
  }
  .home-intro h1 {
    max-width: 11.5ch;
    font-size: clamp(43px, 12vw, 62px);
  }
  .home-intro > p {
    font-size: 18px;
    margin-top: 22px;
  }
  .hero-actions {
    align-items: flex-start;
    flex-direction: column;
    gap: 7px;
    margin-top: 24px;
  }
  .hero-actions .primary-button {
    font-size: 14px;
  }
  .topic-list h2 {
    font-size: 28px;
  }
  .topic-row {
    min-height: 106px;
  }
  .topic-row strong {
    font-size: 20px;
  }
  .topic-row small {
    font-size: 13px;
  }
  .home-tools {
    grid-template-columns: 1fr;
    padding-block: 34px;
    gap: 30px;
  }
  .home-tools > h2 {
    font-size: 43px;
  }
  .home-tools > div {
    border: 0;
    padding: 0;
  }
  .tool-row strong {
    font-size: 23px;
  }
  .paper-band .tool-row small {
    font-size: 14px;
  }
  .home-principles {
    grid-template-columns: 1fr;
    padding-block: 42px;
    gap: 30px;
  }
  .home-principles h2 {
    font-size: 36px;
  }
  .site-footer {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .site-footer > p {
    grid-column: auto;
  }
  .site-footer nav {
    gap: 4px;
  }
  .site-footer a {
    min-height: 40px;
  }
  .page-heading {
    padding: 30px 0;
  }
  .page-heading h1 {
    font-size: 42px;
    max-width: 16ch;
    line-height: 1.08;
  }
  .page-heading > p {
    font-size: 18px;
  }
  .article-heading h1 {
    max-width: 16ch;
  }
  .breadcrumbs {
    font-size: 12px;
    padding-top: 22px;
  }
  .article-body h2 {
    font-size: 28px;
  }
  .article-body p,
  .article-body li {
    font-size: 16px;
    line-height: 1.75;
  }
  .contents {
    gap: 5px 16px;
  }
  .contents > a {
    min-height: 38px;
  }
  .article-body > section {
    padding: 25px 0;
  }
  .reading-table {
    font-size: 13px;
  }
  .reading-table th,
  .reading-table td {
    padding: 14px 10px;
  }
  .scenario-spec {
    max-width: 380px;
  }
  .guide-directory .topic-row strong {
    font-size: 22px;
  }
  .guide-directory .topic-row small {
    font-size: 15px;
  }
  .guide-directory .topic-row {
    min-height: 135px;
  }
  .sheet-controls {
    align-items: stretch;
    gap: 14px;
  }
  .sheet-controls > label {
    flex: 1 1 145px;
  }
  .sheet-controls .checkbox-label {
    flex-basis: 100%;
  }
  .sheet-table {
    border: 0;
  }
  .sheet-table-head {
    display: none;
  }
  .tire-row {
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    padding: 20px 0;
    border-top: 1px solid #7198ac;
  }
  .tire-row > h2 {
    grid-column: 1/-1;
    font-size: 21px;
  }
  .tire-row > label {
    gap: 7px;
  }
  .mobile-field-label {
    display: block;
    grid-column: 1/-1;
    font-size: 11px;
    color: var(--ice);
    line-height: 1.5;
  }
  .tire-row input {
    height: 48px;
  }
  .tire-difference {
    grid-column: 1/-1;
    font-size: 13px;
    min-height: 20px;
  }
  .sheet-meta {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .sheet-actions {
    gap: 10px;
  }
  .sheet-actions > button {
    flex: 1 1 140px;
  }
  .sheet-aside {
    display: block;
    padding: 25px 0 0;
  }
  .sheet-aside .article-steps {
    margin-top: 18px;
  }
  .sheet-summary {
    grid-template-columns: 1fr;
    gap: 20px;
    padding-block: 30px;
  }
  .sheet-summary > h2 {
    font-size: 36px;
  }
  .sheet-summary p {
    font-size: 16px;
  }
  .sheet-sources {
    padding-block: 22px;
  }
  .comparison-table-section h2 {
    font-size: 28px;
  }
  .calc-related .tool-row {
    min-height: 85px;
  }
}
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation: none !important;
    transition: none !important;
  }
}
@media print {
  body {
    background: white !important;
    color: #111 !important;
    font-size: 11pt;
  }
  .header-band,
  .footer-band,
  .sheet-controls,
  .sheet-aside,
  .sheet-actions,
  .skip-link,
  .sheet-sources,
  .sheet-error,
  .noscript-message {
    display: none !important;
  }
  .site-frame {
    width: 100%;
    max-width: none;
  }
  .page-heading {
    padding: 0 0 15px;
  }
  .page-heading h1 {
    font-size: 26pt;
  }
  .page-heading > p {
    font-size: 12pt;
    color: #222 !important;
  }
  .sheet-layout {
    display: block;
    padding-bottom: 15px;
  }
  .sheet-table {
    border: 1px solid #777;
  }
  .sheet-table-head,
  .tire-row {
    display: grid;
    grid-template-columns: 1fr 1.2fr 1.2fr 1fr;
    gap: 10px;
    padding: 10px;
    border-color: #777;
    break-inside: avoid;
  }
  .sheet-table-head {
    background: #eee;
  }
  .tire-row {
    min-height: 58px;
    padding: 8px 10px;
  }
  .tire-row > h2 {
    font-size: 11pt;
    grid-column: auto;
  }
  .tire-row > label {
    color: #111;
  }
  .tire-row input,
  .sheet-meta input {
    border: 1px solid #aaa;
    background: white !important;
    color: #111 !important;
    height: 32px;
    min-height: 32px;
    font-size: 11pt;
    color-scheme: light;
  }
  .mobile-field-label {
    display: none;
  }
  .tire-difference {
    grid-column: auto;
    color: #111 !important;
  }
  .sheet-unit-label,
  .service-note,
  .sheet-meta > label {
    color: #222 !important;
  }
  .sheet-meta {
    grid-template-columns: 150px 1fr;
  }
  .paper-band {
    background: white !important;
  }
  .sheet-summary {
    display: block;
    padding: 15px 0;
  }
  .sheet-summary > h2 {
    font-size: 19pt;
    margin-bottom: 10px;
  }
  .sheet-summary p {
    font-size: 11pt;
  }
  .sheet-sources {
    display: block !important;
    font-size: 9pt;
    padding: 0;
  }
  .sheet-sources .reference-list {
    display: none;
  }
  .sheet-sources .review-date {
    display: none;
  }
}

/* Explanatory content: keep facts and captions readable on every surface. */
.explanatory-figure {
  margin: 24px 0;
  min-width: 0;
}
.explanatory-figure picture {
  display: block;
}
.explanatory-figure img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--line-light);
}
.explanatory-figure figcaption {
  margin-top: 12px;
  font-size: 14px;
  line-height: 1.65;
  color: var(--ice);
  max-width: 75ch;
}
.reading-page .explanatory-figure figcaption,
.paper-band .explanatory-figure figcaption {
  color: #415a70;
}
.home-hero-illustrated {
  gap: 58px;
}
.home-intro .hero-fact {
  font-size: 15px;
  line-height: 1.7;
  max-width: 55ch;
  color: var(--ice);
  margin-top: 25px;
}
.home-hero-figure .explanatory-figure {
  margin: 0;
}
.home-hero-figure .explanatory-figure img {
  border-color: #31526a;
}
.home-hero-figure > .action-link {
  margin-top: 6px;
}
.home-essentials,
.home-question-section,
.home-common-questions {
  padding-block: 70px;
}
.section-intro {
  max-width: 820px;
  margin-bottom: 34px;
}
.section-intro h2,
.story-copy h2,
.home-evidence h2 {
  margin: 0 0 19px;
  font-size: clamp(32px, 3.3vw, 46px);
  line-height: 1.1;
  letter-spacing: -0.045em;
  text-wrap: balance;
}
.section-intro p,
.story-copy p,
.home-question-note p,
.home-evidence p {
  font-size: 17px;
  line-height: 1.75;
  color: var(--ice);
  max-width: 65ch;
}
.paper-band .section-intro p,
.paper-band .story-copy p,
.paper-band .home-evidence p {
  color: #415a70;
}
.answer-columns {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 40px;
}
.answer-columns article {
  border-top: 1px solid var(--line-bright);
  padding-top: 23px;
}
.paper-band .answer-columns article {
  border-color: var(--line-light);
}
.step-number {
  display: block;
  font:
    500 20px "IBM Plex Mono",
    monospace;
  color: #0056d8;
  margin-bottom: 20px;
}
.answer-columns h3,
.home-question-note h3 {
  margin: 0 0 15px;
  font-size: 25px;
  line-height: 1.2;
  letter-spacing: -0.035em;
  text-wrap: balance;
}
.answer-columns p {
  font-size: 16px;
  line-height: 1.8;
  color: var(--ice);
}
.paper-band .answer-columns p {
  color: #415a70;
}
.answer-columns a {
  text-underline-offset: 4px;
}
.home-question-layout {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 80px;
  align-items: start;
}
.home-question-note {
  padding-top: 25px;
  border-top: 1px solid var(--line-bright);
}
.illustrated-story {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 60px;
  align-items: center;
  padding-block: 76px;
}
.illustrated-story .explanatory-figure {
  margin: 0;
}
.home-check-steps {
  padding-left: 23px;
  color: var(--ice);
  font-size: 17px;
  line-height: 1.75;
}
.home-check-steps li {
  padding-left: 5px;
  margin: 14px 0;
}
.home-check-steps li::marker {
  color: var(--cyan);
  font-family: "IBM Plex Mono", monospace;
}
.home-check-steps strong {
  color: var(--white);
}
.home-common-questions .answer-columns a {
  color: var(--cyan);
  line-height: 1.7;
}
.paper-band .action-link,
.paper-band .inline-source a,
.paper-band .answer-columns a {
  color: #0056d8;
}
.story-copy .inline-source {
  font-size: 14px;
}
.home-evidence {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 85px;
  align-items: start;
  padding-block: 64px;
}
.home-evidence .action-link {
  color: #0056d8;
}
.directory-intro {
  max-width: 840px;
  padding-block: 10px 32px;
}
.directory-intro h2 {
  font-size: 30px;
  letter-spacing: -0.035em;
}
.directory-intro > p {
  font-size: 17px;
  line-height: 1.75;
  color: #415a70;
}
@media (max-width: 1000px) {
  .answer-columns {
    gap: 25px;
  }
  .home-question-layout {
    gap: 40px;
  }
  .illustrated-story {
    gap: 30px;
  }
  .home-hero-illustrated {
    gap: 35px;
  }
}
@media (max-width: 820px) {
  .home-hero-illustrated,
  .home-question-layout,
  .illustrated-story,
  .home-evidence {
    grid-template-columns: minmax(0, 1fr);
    gap: 30px;
  }
  .home-hero-figure {
    max-width: 640px;
  }
  .answer-columns {
    grid-template-columns: minmax(0, 1fr);
    gap: 25px;
  }
  .home-essentials,
  .home-question-section,
  .home-common-questions,
  .illustrated-story,
  .home-evidence {
    padding-block: 46px;
  }
  .section-intro {
    margin-bottom: 25px;
  }
  .answer-columns article {
    padding-top: 19px;
  }
  .answer-columns h3,
  .home-question-note h3 {
    font-size: 24px;
  }
  .step-number {
    margin-bottom: 12px;
  }
  .home-evidence {
    gap: 12px;
  }
}
/* Task tools inherit the site's editorial palette and reading rhythm. */
.support-form {padding:28px;background:#edf5fa;border:1px solid #bdceda;color:#071b3d;margin:26px 0;}
.support-grid {display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;margin-bottom:22px;}
.support-grid label {display:flex;flex-direction:column;gap:9px;font-size:15px;font-weight:600;}
.support-grid input,.support-grid select {min-height:48px;max-width:100%;width:100%;box-sizing:border-box;padding:10px 12px;background:white;color:#071b3d;border:1px solid #6f8b9e;border-radius:2px;font:inherit;}
.support-form button {margin:6px 8px 6px 0;}
.support-form p {font-size:15px;line-height:1.6;}
.support-form [aria-invalid=true] {border:2px solid #b5202c;}
.conversion-values {display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;margin-top:28px;border-top:1px solid #bdceda;padding-top:22px;}
.conversion-values[hidden] {display:none;}
.conversion-values div {display:flex;flex-direction:column;gap:6px;}
.conversion-values output {font-size:28px;letter-spacing:-.04em;font-weight:700;overflow-wrap:anywhere;}
.unit-equation {display:flex;gap:18px;align-items:center;flex-wrap:wrap;font-size:23px;font-weight:600;border-block:1px solid #bdceda;padding:25px 0;margin:25px 0;color:#0056d8;}
.guide-group {margin:55px 0;}
.guide-group > h2 {font-size:32px;letter-spacing:-.04em;}
.guide-group > p {color:#415a70;line-height:1.7;}
.saved-checks {padding-block:55px;color:var(--ice);}
.saved-checks .reference-list p,.saved-checks p {line-height:1.7;}
.saved-checks a {color:var(--cyan);}
.saved-checks .reference-list li {color:var(--ice);overflow-wrap:anywhere;}
.saved-checks .section-intro {max-width:800px;}
.saved-checks button:disabled {opacity:.5;cursor:default;}
#history-comparison {margin-block:25px;}
#history-comparison li {line-height:1.7;margin-block:10px;}
#manual-results [hidden] {display:none;}
@media(max-width:700px){.support-form{padding:18px}.support-grid{grid-template-columns:minmax(0,1fr);gap:16px}.conversion-values{grid-template-columns:minmax(0,1fr)}.conversion-values div{flex-direction:row;justify-content:space-between;align-items:center}.unit-equation{font-size:18px;gap:12px}.guide-group > h2{font-size:27px}.saved-checks{padding-block:35px}}
@media print{.saved-checks{display:none!important}}
.support-form .secondary-button {color:#071b3d;border-color:#6f8b9e;background:transparent;}
.support-form .secondary-button:hover {background:#dceaf3;color:#071b3d;}