/* Public pages extend the approved calculator identity. */
:root { --site-ink: #263e35; --site-muted: #58664f; --site-ground: #f7f8f4; scrollbar-color: #8b9b81 var(--site-ground); }
:root[data-theme="dark"] { --site-ink: #e3e9de; --site-muted: #c1cbbb; --site-ground: #171d18; }
html { scroll-behavior: smooth; scroll-padding-top: 24px; }
body.public-site { color: var(--site-ink); background: var(--site-ground); }
.public-site ::selection { background: var(--green); color: var(--paper); }
.public-site :focus-visible { outline: 2px solid var(--green); outline-offset: 4px; }
.public-site input { caret-color: var(--green); }
.public-site a { text-underline-offset: .25em; text-decoration-thickness: 1px; }
.public-site a:hover { text-decoration-thickness: 2px; }
.skip-link { position: absolute; left: 20px; top: -100px; z-index: 10; padding: 14px 20px; background: var(--paper); color: var(--green); border-radius: 8px; }
.skip-link:focus { top: 12px; }
.public-header { max-width: 1264px; margin: auto; padding: 22px 32px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.public-header .brand-logo { width: 178px; height: 60px; display: block; object-fit: contain; }
.public-nav { display: flex; gap: 28px; align-items: center; flex-wrap: wrap; }
.public-nav a { display: flex; align-items: center; min-height: 44px; font-size: 14px; text-decoration: none; color: var(--site-muted); }
.public-nav a:hover, .public-nav a[aria-current="page"] { color: var(--green); text-decoration: underline; }
.public-nav a[aria-current="page"] { font-weight: 600; }
.public-home { max-width: 1200px; margin: 36px auto 64px; padding: 0 32px; display: grid; grid-template-columns: minmax(260px, 1fr) minmax(0, 570px); gap: clamp(32px, 6vw, 88px); align-items: start; }
.home-intro { padding-top: 48px; }
.home-intro h1 { font-size: clamp(44px, 4.7vw, 64px); line-height: 1.06; font-weight: 550; letter-spacing: -.035em; margin: 0 0 26px; }
.home-lead { font-size: 18px; line-height: 1.65; color: var(--site-muted); margin: 0 0 20px; }
.text-link { display: inline-flex; gap: 16px; align-items: center; min-height: 44px; font-size: 15px; font-weight: 600; }
.home-intro .intro-rule { margin-top: 48px; width: min(100%, 260px); }
.home-caption { font-size: 12px; color: var(--site-muted); margin-top: 0; }
.home-details { margin-top: 64px; max-width: 330px; }
.home-details h2 { font-size: 25px; letter-spacing: -.025em; font-weight: 550; margin: 0 0 18px; }
.home-details p { font-size: 15px; line-height: 1.8; color: var(--site-muted); }
.home-details a { font-size: 14px; display: inline-block; padding-block: 8px; }
.home-details .local-note { padding-top: 22px; margin-top: 26px; border-top: 1px solid var(--border); color: var(--site-ink); }
.android-link { display: block !important; margin-top: 20px; font-weight: 600; }
.calculator-column { min-width: 0; }
.public-home .calculator { padding: 26px; }
.public-home .calculator-heading h2 { font-size: 22px; }
.public-home .screen-switch { margin-bottom: 18px; }
.public-home .screen-switch button { font-size: 15px; min-height: 48px; }
.public-home .editor-top, .public-home .editor-top button { font-size: 13px; }
.public-home .measure-meta > label, .public-home .fraction-caption, .public-home .measure-fields label { font-size: 12px; }
.public-home .measure-fields { min-height: 106px; }
.public-home .measure-fields input { height: 66px; }
.public-home .fraction-group input { height: 40px; }
.public-home .measure-meta .wrapping-select { font-size: 15px; }
.public-home .measure-meta .operation-symbol { top: 117px; }
.public-home .input-hint { font-size: 12px; margin: 12px 0 16px; }
.public-home .operators button { height: 44px; }
.public-home .answer-panel { padding: 12px 16px 14px; }
.public-home .answer-heading { font-size: 13px; }
.public-home .answer { min-height: 76px; flex-wrap: wrap; }
.public-home .mixed-result { max-width: 100%; overflow-wrap: anywhere; flex-wrap: wrap; justify-content: center; }
.public-home .answer-detail { font-size: 12px; }
.public-home .formats { flex-wrap: wrap; }
.public-home .formats button { flex: 1 1 44px; min-height: 44px; font-size: 12px; padding-inline: 4px; }
.public-home .tape-control, .public-home .tape-control select { font-size: 12px; }
.public-home .simple-keypad { grid-template-rows: repeat(4, 48px); }
.public-home .preview-caption { font-size: 11px; }
.calculation-note { margin: 22px 12px 0; font-size: 12px; line-height: 1.7; color: var(--site-muted); }
.public-home .tool-intro p, .public-home .tool-note, .public-home .tool-form-hint { font-size: 13px; }
.public-home .tool-field { font-size: 13px; }
.public-home .tool-tabs button, .public-home .tool-groups button { font-size: 13px; min-height: 44px; }
.no-script { background: var(--mint); padding: 20px; border-radius: 12px; line-height: 1.7; }
.reading-layout { max-width: 1100px; margin: 48px auto 100px; padding: 0 32px; display: grid; grid-template-columns: 200px minmax(0, 1fr); gap: 56px 64px; align-items: start; }
.reading-intro { grid-column: 1 / -1; max-width: 750px; padding-bottom: 42px; border-bottom: 1px solid var(--border); }
.reading-intro h1 { font-size: clamp(38px, 5vw, 60px); font-weight: 550; letter-spacing: -.035em; line-height: 1.1; margin: 0 0 24px; text-wrap: balance; }
.page-lead { font-size: 20px; line-height: 1.65; color: var(--site-muted); max-width: 640px; margin: 0; }
.page-meta { color: var(--site-muted); font-size: 13px; line-height: 1.6; margin: 24px 0 0; }
.contact-link { display: inline-flex; align-items: center; gap: 24px; min-height: 52px; margin-top: 28px; padding: 14px 20px; border-radius: 10px; background: var(--green); color: var(--paper); font-size: 16px; text-decoration: none; }
.page-contents { position: sticky; top: 28px; display: grid; gap: 8px; }
.page-contents a { display: block; padding: 10px 0; font-size: 14px; color: var(--site-muted); line-height: 1.4; text-decoration: none; }
.page-contents a:hover { color: var(--green); text-decoration: underline; }
.reading-body { font-size: 16px; line-height: 1.8; min-width: 0; max-width: 70ch; }
.reading-body section + section { margin-top: 44px; }
.reading-body h2 { font-size: 25px; line-height: 1.3; letter-spacing: -.02em; font-weight: 550; margin: 0 0 16px; scroll-margin-top: 28px; }
.reading-body p { margin: 0 0 18px; }
.reading-body ul, .reading-body ol { padding-left: 22px; margin-block: 16px 24px; }
.reading-body li { padding-left: 5px; margin-bottom: 12px; }
.reading-body strong { font-weight: 600; }
.reading-body a { color: var(--green); }
.package-name { overflow-wrap: anywhere; }
.support-body details { border-bottom: 1px solid var(--border); padding: 0 0 2px; }
.support-body summary { cursor: pointer; padding: 18px 0; font-weight: 550; line-height: 1.5; }
.support-body summary:hover { color: var(--green); }
.support-body details p { color: var(--site-muted); }
.support-body .worked-example { background: var(--mint); color: var(--site-ink); padding: 22px; border-radius: 12px; font-size: 21px; font-variant-numeric: tabular-nums; }
.back-link { display: inline-flex; align-items: center; gap: 24px; min-height: 48px; margin-top: 28px; }
.public-footer { display: flex; flex-wrap: wrap; gap: 20px 32px; max-width: 1200px; padding: 28px 32px 36px; border-top: 1px solid var(--border); margin: 0 auto; align-items: center; color: var(--site-muted); font-size: 13px; }
.footer-name { margin: 0 auto 0 0; }
.footer-links { display: flex; gap: 24px; align-items: center; }
.footer-links a { display: inline-flex; align-items: center; min-height: 44px; }
.footer-appearance { display: flex; gap: 8px; align-items: center; }
.footer-appearance select { min-height: 44px; border: 1px solid var(--border); border-radius: 8px; background: var(--paper); color: var(--site-ink); padding: 8px; font-size: 13px; }
.error-page { display: block; min-height: 50vh; max-width: 800px; margin: 64px auto; padding: 0 32px; }
.error-page h1 { font-size: 44px; letter-spacing: -.03em; }
.error-page p { font-size: 18px; line-height: 1.7; }
@media (max-width: 900px) {
  .public-home { grid-template-columns: minmax(0, 1fr); max-width: 650px; gap: 28px; margin-top: 18px; }
  .home-intro { padding-top: 0; }
  .home-intro h1 { font-size: 42px; }
  .home-details, .home-intro .intro-rule, .home-caption { display: none; }
  .home-lead { font-size: 17px; margin-bottom: 8px; }
  .reading-layout { grid-template-columns: 150px minmax(0, 1fr); gap: 36px; }
}
@media (max-width: 720px) {
  .public-header { padding: 12px 20px; gap: 10px; flex-wrap: wrap; }
  .public-header .brand-logo { width: 146px; height: 49px; }
  .public-nav { gap: 16px; }
  .public-nav a { font-size: 13px; }
  .public-home { padding: 0; margin: 16px auto 40px; }
  .home-intro { padding: 0 24px; }
  .home-intro h1 { font-size: 36px; margin-bottom: 16px; }
  .home-intro h1 br { display: none; }
  .home-intro h1 br::after { content: ' '; }
  .public-home .calculator { border-radius: 0; box-shadow: none; padding: 18px 20px 24px; }
  .public-home .calculator-heading { min-height: 44px; margin-bottom: 10px; }
  .public-home .calculator-heading h2 { display: block; font-size: 20px; }
  .public-home .calculator-brand { display: none; }
  .public-home .measure-meta .wrapping-select { font-size: 14px; }
  .public-home .measure-fields input { font-size: 28px; }
  .public-home .measure-fields input.long { font-size: 17px; }
  .public-home .fraction-group input { font-size: 22px; }
  .public-home .measure-meta .operation-symbol { top: 111px; }
  .calculation-note { margin-inline: 24px; }
  .reading-layout { display: block; margin: 30px auto 56px; padding: 0 24px; }
  .reading-intro { padding-bottom: 26px; }
  .page-lead { font-size: 18px; }
  .page-contents { position: static; display: flex; flex-wrap: wrap; gap: 0 20px; margin: 18px 0 36px; }
  .page-contents a { min-height: 44px; }
  .reading-body h2 { font-size: 23px; }
  .public-footer { padding: 24px; gap: 12px 24px; }
  .footer-name { flex-basis: 100%; }
  .footer-links { gap: 20px; }
}
@media (max-width: 380px) {
  .public-header { gap: 0; }
  .public-header .public-nav { width: 100%; justify-content: space-between; }
  .public-home .calculator { padding-inline: 16px; }
  .public-home .calculator-heading h2 { font-size: 18px; }
  .public-home #measurements:has(.has-feet) .measure-meta .operation-symbol { top: -23px; }
  .public-home .formats button { flex-basis: 60px; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

/* Task pages keep the shared calculator beside concise, useful instructions. */
.calculator-landing { grid-template-areas: "intro calculator" "guide calculator"; row-gap: 40px; }
.calculator-landing .home-intro { grid-area: intro; padding-top: 22px; }
.calculator-landing .calculator-column { grid-area: calculator; }
.calculator-landing .home-intro h1 { font-size: clamp(36px, 3.8vw, 50px); text-wrap: balance; }
.landing-summary { font-size: 15px; line-height: 1.75; color: var(--site-muted); }
.example-preview { margin-top: 28px; padding-block: 22px; border-block: 1px solid var(--border); }
.example-preview > p:first-child { font-size: 13px; margin: 0 0 12px; color: var(--site-muted); }
.example-equation { font-size: clamp(18px, 2vw, 22px); line-height: 1.8; margin: 0; font-variant-numeric: tabular-nums; }
.example-equation strong { font-weight: 600; }
.example-button { margin-top: 12px; padding: 10px 16px; min-height: 44px; border: 1px solid var(--border); border-radius: 10px; color: var(--green); background: var(--paper); font: inherit; font-size: 14px; cursor: pointer; }
.example-button:hover { background: var(--mint); border-color: var(--green); }
.landing-guide { grid-area: guide; font-size: 15px; }
.landing-guide h2 { font-size: 23px; }
.division-example { margin: 24px 0; }
.division-segments { display: flex; border-block: 1px solid var(--green); }
.division-segments span { flex: 1; text-align: center; padding: 16px 4px; border-inline-start: 1px solid var(--green); font-size: 14px; }
.division-segments span:last-child { border-inline-end: 1px solid var(--green); }
.division-example figcaption { margin-top: 14px; color: var(--site-muted); font-size: 14px; line-height: 1.7; }
.calculator-directory { max-width: 1200px; padding: 28px 32px; margin: 0 auto 16px; display: flex; align-items: center; gap: 12px 32px; flex-wrap: wrap; }
.calculator-directory h2 { flex-basis: 100%; margin: 0 0 4px; font-size: 23px; font-weight: 550; letter-spacing: -.02em; }
.calculator-directory a { display: inline-flex; min-height: 44px; align-items: center; color: var(--green); font-size: 15px; }
@media (max-width: 900px) {
  .calculator-landing { grid-template-areas: "intro" "calculator" "guide"; row-gap: 28px; }
  .calculator-landing .home-intro { padding-top: 0; }
  .calculator-landing .home-intro h1 { font-size: 36px; }
  .calculator-landing .example-preview { margin-top: 16px; padding-block: 14px; }
  .calculator-landing .example-equation { font-size: 18px; }
}
@media (max-width: 720px) {
  .landing-guide { padding: 0 24px; }
  .calculator-directory { padding: 24px; gap: 4px 24px; }
  .calculator-directory a { flex-basis: 100%; }
}