@layer reset, tokens, base, layout, components, utilities;

@layer reset {
  *, *::before, *::after { box-sizing: border-box; }
  * { margin: 0; }
  html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }
  img, picture, svg { display: block; max-inline-size: 100%; block-size: auto; }
  input, button, textarea, select { font: inherit; }
  ul[class], ol[class] { list-style: none; padding: 0; }
  @media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; scroll-behavior: auto !important; }
  }
}

@layer tokens {
  :root {
    color-scheme: light dark;
    --bg: #ffffff;
    --surface: #f1f7f7;
    --text: #132120;
    --muted: #455a59;
    --link: #006a6a;
    --accent: #008080;
    --on-accent: #ffffff;
    --border: #cfe0df;
    --focus: #b54708;
    --border-strong: #5f7a79;
    --amber: #fdbc02;
    --orange: #fd6b03;
    --error: #b42318;
    --scroll-shadow: rgb(0 0 0 / .35);
    --font: system-ui, -apple-system, "Segoe UI", Roboto, "Noto Sans Devanagari", "Nirmala UI", "Helvetica Neue", Arial, sans-serif;
    --s-1: .25rem; --s-2: .5rem; --s-3: .75rem; --s-4: 1rem; --s-5: 1.5rem;
    --s-6: 2rem; --s-7: 3rem; --s-8: 4rem; --s-9: 6rem;
    --step-0: clamp(1rem, .96rem + .2vw, 1.125rem);
    --step-1: clamp(1.2rem, 1.1rem + .5vw, 1.4rem);
    --step-2: clamp(1.44rem, 1.25rem + .95vw, 1.85rem);
    --step-3: clamp(1.7rem, 1.4rem + 1.5vw, 2.5rem);
    --step-4: clamp(2rem, 1.5rem + 2.5vw, 3.5rem);
    --radius: .5rem;
    --radius-lg: 1rem;
    --tap: 2.75rem;
    --measure: 65ch;
    --wrap: 72rem;
  }
  /* fallback for browsers without light-dark(): same dark values */
  @media (prefers-color-scheme: dark) {
    :root {
      --bg: #0e1717; --surface: #152322; --text: #e6f1f0; --muted: #a9c0be; --link: #5fd6d6; --accent: #3fc1c1;
      --on-accent: #0a1414; --border: #345352; --focus: #ffb74d; --border-strong: #6f9694; --error: #ff9b8f; --scroll-shadow: rgb(255 255 255 / .3);
    }
  }
  @supports (color: light-dark(#000, #fff)) {
    :root {
      --bg: light-dark(#ffffff, #0e1717);
      --surface: light-dark(#f1f7f7, #152322);
      --text: light-dark(#132120, #e6f1f0);
      --muted: light-dark(#455a59, #a9c0be);
      --link: light-dark(#006a6a, #5fd6d6);
      --accent: light-dark(#008080, #3fc1c1);
      --on-accent: light-dark(#ffffff, #0a1414);
      --border: light-dark(#cfe0df, #345352);
      --focus: light-dark(#b54708, #ffb74d);
      --border-strong: light-dark(#5f7a79, #6f9694);
      --error: light-dark(#b42318, #ff9b8f);
      --scroll-shadow: light-dark(rgb(0 0 0 / .35), rgb(255 255 255 / .3));
    }
  }
}

@layer base {
  html { scroll-padding-top: var(--s-4); }
  body {
    font-family: var(--font); font-size: var(--step-0); line-height: 1.6;
    color: var(--text); background: var(--bg);
    min-block-size: 100dvh; display: flex; flex-direction: column;
  }
  main { flex: 1; scroll-margin-top: var(--s-4); }
  h1, h2, h3, h4 { line-height: 1.2; text-wrap: pretty; }
  h1 { font-size: var(--step-4); text-wrap: balance; letter-spacing: -.02em; }
  h2 { font-size: var(--step-3); }
  h3 { font-size: var(--step-2); }
  h4 { font-size: var(--step-1); }
  p, li, figcaption { text-wrap: pretty; }
  a { color: var(--link); text-underline-offset: .2em; text-decoration-thickness: .08em; }
  a:hover { text-decoration-thickness: .16em; }
  :focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; }
  :target { scroll-margin-top: var(--s-5); }
}

@layer layout {
  .wrap { inline-size: min(100% - 2 * var(--s-4), var(--wrap)); margin-inline: auto; }
  .stack { --stack: var(--s-5); }
  .stack.stack--tight { --stack: var(--s-3); }
  .stack > * + * { margin-block-start: var(--stack); }
  .section { padding-block: var(--s-7); }
  .section > h2 { margin-block-end: var(--s-4); }
  .section > :is(p, .lead) { max-inline-size: var(--measure); }
  main > .wrap.section:first-child { padding-block-start: var(--s-2); }
  .section > p + :is(.stack, .stats, .table-wrap, .grid-cards) { margin-block-start: var(--s-5); }
  .grid-cards {
    display: grid; gap: var(--s-5);
    grid-template-columns: repeat(auto-fill, minmax(min(100%, 16rem), 1fr));
  }
  .prose { max-inline-size: var(--measure); }
  .prose > * + * { margin-block-start: var(--s-4); }
  .prose > :is(h2, h3) { margin-block-start: var(--s-7); }
  .prose :is(ul, ol) { padding-inline-start: 1.25rem; }
  .prose li + li { margin-block-start: var(--s-2); }
  .prose > :is(.faq, .author-box) { margin-block-start: var(--s-7); }
  .faq > h2 { margin-block-end: var(--s-4); }
}

@layer components {
  /* skip link */
  .skip {
    position: absolute; inset-inline-start: var(--s-3); inset-block-start: -4rem; z-index: 10;
    display: inline-flex; align-items: center; min-block-size: var(--tap); padding-inline: var(--s-4);
    background: var(--accent); color: var(--on-accent); border-radius: var(--radius);
  }
  .skip:focus { inset-block-start: var(--s-3); }

  /* header + nav: always visible, wraps, no JS, no layout shift */
  .site-header { border-block-end: 4px solid var(--accent); }
  .brand { position: relative; }
  @media (min-width: 40em) { .brand::after { content: ""; position: absolute; inset-inline-start: 0; inset-block-end: calc(-1 * var(--s-2) - 4px); inline-size: 3rem; block-size: 4px; background: linear-gradient(90deg, var(--amber) 0 50%, var(--orange) 50%); } }
  .site-header .wrap {
    display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between;
    gap: var(--s-1) var(--s-5); padding-block: var(--s-2);
  }
  .brand {
    display: inline-flex; align-items: center; gap: var(--s-3); min-block-size: var(--tap);
    font-weight: 700; font-size: var(--step-1); color: var(--text); text-decoration: none;
  }
  .brand .logo { inline-size: 2.25rem; block-size: 2.25rem; flex: none; }
  .nav ul { display: flex; flex-wrap: wrap; gap: var(--s-2); list-style: none; padding: 0; }
  .nav a {
    display: inline-flex; align-items: center; min-block-size: var(--tap); padding-inline: var(--s-3);
    color: var(--text); text-decoration: none; border-radius: var(--radius);
  }
  .nav a:hover { background: var(--surface); }
  .nav a[aria-current] { font-weight: 700; text-decoration: underline; text-underline-offset: .35em; }

  @media (max-width: 26em) { .nav ul { gap: 0; } .nav a { padding-inline: .55rem; } }

  /* buttons */
  .btn {
    display: inline-flex; align-items: center; justify-content: center; min-block-size: 3rem;
    padding-inline: var(--s-5); border: 2px solid var(--accent); border-radius: var(--radius);
    background: var(--accent); color: var(--on-accent); font-weight: 700; text-decoration: none;
  }
  .btn:not(.btn--ghost):hover { background: var(--link); border-color: var(--link); }
  .btn--ghost { background: transparent; color: var(--link); }
  .btn--ghost:hover { background: var(--surface); }
  .link-more { display: inline-flex; align-items: center; min-block-size: var(--tap); font-weight: 600; }
  .actions { display: flex; flex-wrap: wrap; gap: var(--s-3); }

  /* hero: text first in DOM, image second; side by side from 64em */
  .hero { display: grid; gap: var(--s-5); padding-block: var(--s-6); }
  .hero__text { display: grid; gap: var(--s-4); align-content: center; }
  .hero__media { margin: 0; }
  .hero__media img { inline-size: 100%; aspect-ratio: 16 / 9; object-fit: cover; border-radius: var(--radius-lg); }
  @media (min-width: 64em) {
    .hero { grid-template-columns: 1fr 1fr; align-items: center; gap: var(--s-7); }
    .hero__media img { aspect-ratio: 3 / 2; }
  }

  /* alternating feature rows: text first in DOM; flip is visual only */
  .feature { container-type: inline-size; }
  .feature__inner { display: grid; gap: var(--s-4); }
  .feature__media { margin: 0; }
  .feature__media img { inline-size: 100%; aspect-ratio: 3 / 2; object-fit: cover; border-radius: var(--radius-lg); }
  @container (min-width: 40em) {
    .feature__inner { grid-template-columns: 1fr 1fr; align-items: center; gap: var(--s-7); }
    .feature--flip .feature__media { grid-column: 1; grid-row: 1; }
    .feature--flip .feature__body { grid-column: 2; grid-row: 1; }
  }

  /* cards: one stretched link per card */
  .card {
    position: relative; display: grid; grid-template-rows: auto 1fr; overflow: clip;
    border: 1px solid var(--border); border-radius: var(--radius-lg); background: var(--surface);
  }
  .card img { inline-size: 100%; aspect-ratio: 3 / 2; object-fit: cover; }
  .card__body { display: grid; gap: var(--s-2); align-content: start; padding: var(--s-4); }
  .card__title { font-size: var(--step-1); font-weight: 700; }
  .card__meta { color: var(--muted); font-size: .9em; }
  .card__title a { color: var(--text); text-decoration: none; }
  .card__title a::after { content: ""; position: absolute; inset: 0; }
  .card:hover .card__title a { text-decoration: underline; }
  @supports selector(:has(*)) {
    .card a:focus-visible { outline: none; }
    .card:has(a:focus-visible) { outline: 3px solid var(--focus); outline-offset: 2px; }
  }

  /* figures */
  figure { margin-block: var(--s-6); }
  figure img { inline-size: 100%; border-radius: var(--radius); }
  figcaption { margin-block-start: var(--s-2); color: var(--muted); font-size: .9em; }

  /* breadcrumb */
  .breadcrumb ol { display: flex; flex-wrap: nowrap; gap: 0 var(--s-2); list-style: none; padding: 0; padding-block-start: 0; color: var(--muted); font-size: .9em; }
  .breadcrumb li { display: inline-flex; align-items: center; min-block-size: var(--tap); min-inline-size: 0; max-inline-size: 100%; }
  .breadcrumb li + li { margin-block-start: 0; }
  .breadcrumb li[aria-current] { flex: 1 1 0; }
  .crumb-current { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
  /* on phones the heading already names the page: keep the item for screen readers and search engines, show only the trail */
  @media (max-width: 40em) {
    .breadcrumb li[aria-current] { position: absolute; inline-size: 1px; block-size: 1px; min-block-size: 0; overflow: hidden; clip-path: inset(50%); }
  }
  .breadcrumb a { display: inline-flex; align-items: center; min-block-size: var(--tap); padding-inline: var(--s-1); }
  .breadcrumb li + li::before { content: "/" / ""; margin-inline-end: var(--s-2); }

  /* tl;dr and callout */
  .tldr, .callout {
    padding: var(--s-4) var(--s-5); background: var(--surface);
    border-inline-start: .3rem solid var(--amber); border-radius: var(--radius);
  }
  .tldr > :first-child { font-weight: 700; margin-block-end: var(--s-2); }

  /* stats */
  .stats { display: grid; gap: var(--s-5); grid-template-columns: repeat(auto-fit, minmax(min(100%, 12rem), 1fr)); list-style: none; padding: 0; }
  .stat { display: grid; gap: var(--s-1); align-content: start; }
  .stat__value { font-size: var(--step-4); font-weight: 700; line-height: 1; color: var(--accent); }
  .stat__source { color: var(--muted); font-size: .9em; }

  /* table */
  /* tables fit phones where they can; if one still overflows, a small script adds edge shadows (plain box-shadow, no background images) */
  .table-wrap {
    --sl: 0 0 0 0 transparent; --sr: 0 0 0 0 transparent;
    overflow-x: auto; overscroll-behavior-x: contain; box-shadow: var(--sl), var(--sr);
  }
  .table-wrap.can-scroll:not(.at-start) { --sl: inset .9rem 0 .7rem -.7rem var(--scroll-shadow); }
  .table-wrap.can-scroll:not(.at-end) { --sr: inset -.9rem 0 .7rem -.7rem var(--scroll-shadow); }
  table { border-collapse: collapse; inline-size: 100%; }
  th, td { padding: var(--s-2) var(--s-3); text-align: start; vertical-align: top; border-block-end: 1px solid var(--border); }
  th { background: var(--surface); }
  th[scope="row"] { position: sticky; inset-inline-start: 0; box-shadow: 1px 0 0 var(--border); }
  caption { caption-side: top; text-align: start; font-weight: 600; padding-block-end: var(--s-2); }
  td, th { hyphens: auto; overflow-wrap: break-word; }
  @media (max-width: 40em) { table { font-size: .85rem; } th, td { padding: var(--s-2) var(--s-1); } }

  /* faq + toc accordions (native details, no JS) */
  .faq details, .toc {
    border: 1px solid var(--border); border-radius: var(--radius);
  }
  .faq details + details { margin-block-start: var(--s-3); }
  .faq summary, .toc summary {
    display: flex; align-items: center; min-block-size: var(--tap); padding: var(--s-2) var(--s-4);
    font-weight: 700; cursor: pointer;
  }
  .faq details > :not(summary), .toc > :not(summary) { padding-inline: var(--s-4); padding-block-end: var(--s-4); }
  .toc summary::after, .faq summary::after { content: ""; flex: none; inline-size: .55em; block-size: .55em; margin-inline-start: auto; border: solid currentColor; border-width: 0 2px 2px 0; transform: rotate(45deg); transition: transform .15s; }
  .toc[open] summary::after, .faq details[open] summary::after { transform: rotate(-135deg); }
  .toc ol { padding-inline-start: 2.25rem; }
  .toc a { display: inline-flex; align-items: center; min-block-size: var(--tap); }

  /* byline + author box */
  .byline { display: flex; flex-wrap: wrap; align-items: center; gap: var(--s-1) var(--s-4); color: var(--muted); font-size: .95em; }
  .byline time { white-space: nowrap; }
  .byline .reviewed { flex-basis: 100%; display: flex; flex-wrap: nowrap; align-items: center; gap: var(--s-2); color: var(--text); font-weight: 600; }
  .byline .reviewed > span { min-inline-size: 0; }
  .avatar { display: block; flex: none; inline-size: 4.5rem; border-radius: 50%; overflow: hidden; }
  .avatar img { display: block; inline-size: 100%; block-size: auto; aspect-ratio: 1; object-fit: cover; }
  .byline .avatar { inline-size: 2.25rem; }
  .ai-note { font-size: .9em; }
  .ai-note a { color: var(--muted); }
  .author-box { display: grid; grid-template-columns: auto 1fr; align-items: center; gap: var(--s-1) var(--s-4); padding: var(--s-4) var(--s-5); border: 1px solid var(--border); border-radius: var(--radius-lg); }
  .author-box > :not(.avatar) { grid-column: 2; margin: 0; }
  .author-box > .avatar { grid-column: 1; grid-row: 1 / span 2; }

  /* footer */
  .site-footer { margin-block-start: var(--s-8); padding-block: var(--s-7); background: var(--surface); border-block-start: 1px solid var(--border); }
  .footer-grid { display: grid; gap: var(--s-6); grid-template-columns: repeat(auto-fit, minmax(min(100%, 14rem), 1fr)); }
  .footer-grid ul { list-style: none; padding: 0; }
  .footer-grid nav ul { columns: 2; column-gap: var(--s-5); }
  .toc li + li, .footer-grid li + li { margin-block-start: var(--s-2); }
  .footer-grid a { display: inline-flex; align-items: center; min-block-size: var(--tap); }

  /* form fields (documented, unused in the sample pages) */
  .field { display: grid; gap: var(--s-1); }
  .field input, .field textarea, .field select {
    min-block-size: var(--tap); padding: var(--s-2) var(--s-3); font-size: 1rem;
    color: var(--text); background: var(--bg); border: 2px solid var(--border-strong); border-radius: var(--radius);
  }
}

@layer utilities {
  .lead { font-size: var(--step-1); color: var(--muted); }
  .eyebrow { font-size: .85rem; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; color: var(--muted); }
  .visually-hidden { position: absolute; inline-size: 1px; block-size: 1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }
}

/* From Foundation additions */
.lang-switch { display: flex; gap: var(--s-3); margin-inline-start: auto; font-size: .9rem; }
.lang-switch a[aria-current="true"] { font-weight: 700; text-decoration: none; }
.draft-banner { background: var(--surface); border-block: 2px solid var(--focus); padding: var(--s-3) var(--s-4); font-weight: 600; text-align: center; }
.byline .reviewed { font-weight: 600; }
.sources li + li, .changelog li + li { margin-top: var(--s-2); }
.calc { display: grid; gap: var(--s-4); background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: var(--s-5); }
.calc .row { display: grid; gap: var(--s-4) var(--s-3); grid-template-columns: repeat(auto-fit, minmax(min(100%, 14rem), 1fr)); align-items: start; }
.calc .field { display: grid; gap: var(--s-1); align-content: start; }
.calc .pair { display: grid; grid-template-columns: minmax(0, 1fr) 7rem; gap: var(--s-2); }
.calc .field-error { margin: 0; color: var(--error); font-weight: 600; }
.calc [aria-invalid="true"] { border-color: var(--error); border-width: 2px; }
.calc label { display: block; font-weight: 600; margin-block-end: var(--s-1); }
.calc input, .calc select { inline-size: 100%; min-block-size: var(--tap); padding-inline: var(--s-3); border: 1px solid var(--border-strong); border-radius: var(--radius); background: var(--bg); color: var(--text); }
.calc .result { background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius); padding: var(--s-4); }
.calc .error { color: var(--error); font-weight: 600; }

@media print {
  .skip, .site-header .nav, .lang-switch, .site-footer nav, .toc { display: none; }
  body { background: #fff; color: #000; }
  .draft-banner { border: 2px solid #000; background: #fff; }
}

.author-photo { border-radius: 50%; overflow: hidden; inline-size: 12rem; block-size: 12rem; }
.author-photo img { inline-size: 100%; block-size: 100%; object-fit: cover; }
.author-photo--small { inline-size: 4.5rem; block-size: 4.5rem; object-fit: cover; }
.sources ul, ul.sources { list-style: disc; padding-inline-start: 1.25rem; }
.prose > section { margin-block-start: var(--s-7); }

.calc .result:empty { padding: 0; border: 0; block-size: 0; overflow: hidden; margin-block-start: calc(-1 * var(--s-4)); }

.trust-strip { display: flex; flex-wrap: wrap; gap: var(--s-1) var(--s-4); list-style: none; padding: 0; color: var(--muted); font-size: .95em; }
.trust-strip li::before { content: ""; display: inline-block; inline-size: .6rem; block-size: .6rem; margin-inline-end: .5rem; border-radius: 50%; background: var(--amber); }
.trust-strip li:nth-child(2)::before { background: var(--accent); }
.trust-strip li:nth-child(3)::before { background: var(--orange); }
.topic-list { display: flex; flex-wrap: wrap; gap: var(--s-2) var(--s-3); list-style: none; padding: 0; }
.topic-list a { display: inline-flex; align-items: center; min-block-size: var(--tap); padding-inline: var(--s-4); border: 1px solid var(--border-strong); border-radius: 999px; text-decoration: none; }
.topic-list a:hover { background: var(--surface); }
.trust .actions { gap: var(--s-1) var(--s-5); }
.grid-cards > .card:only-child { grid-column: 1 / -1; max-inline-size: 44rem; }
.work-it-out ul, .related ul { padding-inline-start: 1.25rem; }

/* round-2 UX */
.prose h2 + * { margin-block-start: var(--s-3); }
article > header + .prose { margin-block-start: var(--s-5); }
@media (min-width: 72em) {
  .article-body { max-inline-size: none; display: grid; grid-template-columns: minmax(0, var(--measure)) 16rem; column-gap: var(--s-7); align-items: start; }
  .article-body > * { grid-column: 1; }
  .article-body > .toc { grid-column: 2; grid-row: 1 / span 40; position: sticky; inset-block-start: var(--s-4); }
}
.calc .result { background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius); padding: var(--s-4); }
.calc .result-title { margin: 0 0 var(--s-3); color: var(--muted); font-size: .95em; }
.calc .result dl { display: grid; gap: var(--s-3); margin: 0; }
.calc .result .r { display: grid; gap: var(--s-1); padding-block-end: var(--s-3); border-block-end: 1px solid var(--border); }
.calc .result .r:last-child { border-block-end: 0; padding-block-end: 0; }
.calc .result dt { color: var(--muted); font-size: .9em; }
.calc .result dd { margin: 0; display: flex; flex-wrap: wrap; align-items: baseline; gap: var(--s-1) var(--s-3); }
.calc .result .v { font-weight: 700; font-size: var(--step-1); }
.calc .result .r--main .v { font-size: var(--step-3); color: var(--link); line-height: 1.1; }
.calc .result .alts { display: flex; flex-wrap: wrap; gap: 0 var(--s-3); color: var(--muted); font-size: .9em; }
.calc .result .alts span { white-space: nowrap; }
@media (min-width: 40em) { .calc .result .r { grid-template-columns: 11rem 1fr; align-items: baseline; } }
.calc .share { display: flex; flex-wrap: wrap; gap: var(--s-1) var(--s-5); margin: var(--s-3) 0 0; }
button.link-more { background: none; border: 0; padding: 0; color: var(--link); font: inherit; font-weight: 600; text-decoration: underline; text-underline-offset: .2em; cursor: pointer; }
.person-head { display: flex; flex-wrap: wrap; align-items: center; gap: var(--s-4) var(--s-5); }
.person-head > div { flex: 1 1 14rem; min-inline-size: 0; }
.person-head .avatar { inline-size: 8rem; }
.person-head h1 { margin: 0; }
.trust-person { display: flex; flex-wrap: wrap; align-items: center; gap: var(--s-4) var(--s-5); }
.trust-person .avatar { inline-size: 5rem; }
.trust-person > div { flex: 1 1 16rem; min-inline-size: 0; }
.tool-pills { margin-block-start: var(--s-2); }
.callout--quick { display: flex; flex-wrap: wrap; gap: var(--s-1) var(--s-3); align-items: center; }
.callout--quick p { margin: 0; }
.not-found { padding-block-start: var(--s-6); }
:is(:lang(hi), :lang(mr), :lang(ne), :lang(bn), :lang(ta), :lang(te), :lang(kn), :lang(ml), :lang(gu), :lang(pa), :lang(or)) body { line-height: 1.75; }
:is(:lang(hi), :lang(mr), :lang(ne), :lang(bn), :lang(ta), :lang(te), :lang(kn), :lang(ml), :lang(gu), :lang(pa), :lang(or)) :is(h1, h2, h3, h4) { line-height: 1.4; letter-spacing: 0; }
:is(:lang(hi), :lang(mr), :lang(ne), :lang(bn), :lang(ta), :lang(te), :lang(kn), :lang(ml), :lang(gu), :lang(pa), :lang(or)) :is(.eyebrow, .stat__value) { letter-spacing: 0; text-transform: none; line-height: 1.4; }
@media print { .calc .share, .calc form > .btn { display: none; } }

/* round-3 UX */
.trust-person { display: grid; grid-template-columns: auto minmax(0, 1fr); align-items: start; }
.trust-person .avatar { inline-size: 4.5rem; }
.person-head h1 { font-size: var(--step-3); text-wrap: pretty; }
.prose .grid-cards { padding: 0; }
.grid-cards > li + li { margin-block-start: 0; }
.tool-pills { display: none; }
@media (min-width: 40em) { .tool-pills { display: block; } }
.topic-list a[aria-current="page"] { background: var(--accent); color: var(--on-accent); border-color: var(--accent); }
@media (max-width: 40em) { .breadcrumb:has(li:nth-child(2):last-child) ol { position: absolute; inline-size: 1px; block-size: 1px; overflow: hidden; clip-path: inset(50%); } }
@media (max-width: 22em) { .calc .pair { grid-template-columns: 1fr; } .calc { padding: var(--s-3); } }
.calc { border-block-start: 4px solid var(--accent); }
.eyebrow--calc::before { content: ""; display: inline-block; inline-size: 1.1rem; block-size: .8rem; margin-inline-end: .45rem; vertical-align: -.05rem;
  background: radial-gradient(circle at 50% 22%, var(--amber) 0 .2rem, transparent .21rem), radial-gradient(circle at 18% 80%, var(--accent) 0 .2rem, transparent .21rem), radial-gradient(circle at 82% 80%, var(--orange) 0 .2rem, transparent .21rem); }

/* round-4 polish */
.topic-list > li + li { margin-block-start: 0; }
.avatar { background: var(--surface); aspect-ratio: 1; }
@media (max-width: 30em) { .trust-person { grid-template-columns: 1fr; } .trust-person .avatar { inline-size: 4rem; } }
.calc .hint { color: var(--muted); font-size: .85em; }
.calc .next { margin: var(--s-3) 0 0; font-size: .95em; }