/* CaptchaCompare — single stylesheet
 * Layer order: reset → tokens → base → layout → components → utilities → print
 * Font strategy: system stack at v1; swap to self-hosted General Sans + JetBrains Mono later.
 */

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

/* ============================================================
 * TOKENS
 * ============================================================ */
@layer tokens {
  :root {
    /* Colour — light theme only */
    --bg:          #FAFAF7;
    --bg-alt:      #F1F0EB;
    --ink:         #111111;
    --ink-soft:    #4A4A48;
    --ink-quiet:   #8C8C88;
    --rule:        #E3E2DC;
    --rule-strong: #C9C7BE;
    --accent:      #C7F252;
    --accent-ink:  #0E1A00;
    --link:        #1A1A1A;
    --focus:       #2E5B00;

    /* Type */
    --font-sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Inter, Helvetica, Arial, sans-serif;
    --font-mono: ui-monospace, "JetBrains Mono", "SF Mono", Menlo, Consolas, monospace;

    --fs-display: clamp(2.75rem, 7vw, 5.5rem);
    --fs-h1:      clamp(1.875rem, 4vw, 2.75rem);
    --fs-h2:      clamp(1.5rem, 2.5vw, 2rem);
    --fs-h3:      1.25rem;
    --fs-h4:      1.0625rem;
    --fs-body:    1.0625rem;
    --fs-small:   0.875rem;
    --fs-mono:    0.8125rem;

    --lh-tight: 1.05;
    --lh-snug:  1.25;
    --lh-body:  1.65;

    --track-tight: -0.02em;
    --track-normal: 0;
    --track-mono:  0.04em;

    /* Spacing — 8px base */
    --s-1:  4px;
    --s-2:  8px;
    --s-3:  12px;
    --s-4:  16px;
    --s-5:  24px;
    --s-6:  32px;
    --s-7:  48px;
    --s-8:  64px;
    --s-9:  96px;
    --s-10: 128px;

    /* Layout */
    --container-max: 1280px;
    --measure:       68ch;
    --gutter:        16px;
    --gutter-lg:     32px;

    --rule-thin: 1px solid var(--rule);
  }

  @media (min-width: 768px) {
    :root {
      --gutter: var(--gutter-lg);
    }
  }
}

/* ============================================================
 * RESET
 * ============================================================ */
@layer reset {
  *, *::before, *::after { box-sizing: border-box; }
  html { -webkit-text-size-adjust: 100%; tab-size: 4; }
  body, h1, h2, h3, h4, h5, h6, p, figure, blockquote, dl, dd { margin: 0; }
  ul[role="list"], ol[role="list"] { list-style: none; padding: 0; margin: 0; }
  body { min-height: 100svh; line-height: var(--lh-body); }
  h1, h2, h3, h4, h5, h6 { line-height: var(--lh-snug); }
  img, picture, svg, video { max-width: 100%; display: block; height: auto; }
  input, button, textarea, select { font: inherit; color: inherit; }
  a { color: inherit; text-decoration-skip-ink: auto; }
  table { border-collapse: collapse; border-spacing: 0; }
  @media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
      animation-duration: 0.01ms !important;
      animation-iteration-count: 1 !important;
      transition-duration: 0.01ms !important;
      scroll-behavior: auto !important;
    }
  }
}

/* ============================================================
 * BASE
 * ============================================================ */
@layer base {
  html { font-family: var(--font-sans); color: var(--ink); background: var(--bg); }
  body { font-size: var(--fs-body); }

  h1, h2, h3, h4 {
    letter-spacing: var(--track-tight);
    font-weight: 500;
    color: var(--ink);
  }
  h1 { font-size: var(--fs-h1); }
  h2 { font-size: var(--fs-h2); font-weight: 500; }
  h3 { font-size: var(--fs-h3); font-weight: 600; }
  h4 { font-size: var(--fs-h4); font-weight: 600; }

  p { max-width: var(--measure); }

  a {
    color: var(--link);
    text-decoration: underline;
    text-decoration-thickness: 1px;
    text-underline-offset: 3px;
    text-decoration-color: var(--rule-strong);
  }
  a:hover {
    text-decoration-color: var(--accent);
    text-decoration-thickness: 3px;
  }

  :focus-visible {
    outline: 2px solid var(--focus);
    outline-offset: 3px;
    border-radius: 2px;
  }

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

  hr { border: 0; border-top: var(--rule-thin); margin: var(--s-7) 0; }

  code {
    font-family: var(--font-mono);
    font-size: 0.9em;
    background: var(--bg-alt);
    padding: 0.1em 0.35em;
    border-radius: 2px;
  }
  pre {
    font-family: var(--font-mono);
    font-size: var(--fs-small);
    background: var(--bg-alt);
    padding: var(--s-4);
    overflow-x: auto;
    border: var(--rule-thin);
    line-height: 1.55;
  }
  pre code { background: transparent; padding: 0; }

  .skip-link {
    position: absolute;
    left: -9999px;
    top: 0;
    background: var(--ink);
    color: var(--bg);
    padding: var(--s-2) var(--s-4);
    font-family: var(--font-mono);
    text-decoration: none;
    z-index: 100;
  }
  .skip-link:focus { left: var(--s-2); top: var(--s-2); }
}

/* ============================================================
 * LAYOUT
 * ============================================================ */
@layer layout {
  .container {
    max-width: var(--container-max);
    margin-inline: auto;
    padding-inline: var(--gutter);
  }

  main { padding-block: var(--s-7) var(--s-9); }

  .grid-12 {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: var(--s-5);
  }
  @media (max-width: 1023px) {
    .grid-12 { grid-template-columns: 1fr; }
  }
}

/* ============================================================
 * COMPONENTS
 * ============================================================ */
@layer components {

  /* ---- Mono utility (used inline) ---- */
  .mono {
    font-family: var(--font-mono);
    font-size: var(--fs-mono);
    letter-spacing: var(--track-mono);
    text-transform: uppercase;
    color: var(--ink-quiet);
  }

  /* ---- Section marker (Spur-style) ---- */
  .section-marker {
    color: var(--ink-quiet);
    margin-bottom: var(--s-3);
  }

  /* ---- Site header ---- */
  .site-header {
    border-bottom: var(--rule-thin);
    background: var(--bg);
    position: sticky;
    top: 0;
    z-index: 10;
    /* No backdrop-filter / filter / transform here — those would create a
     * containing block for the fixed-position mobile nav panel and trap it
     * inside the header's ~50px tall box. */
  }
  .site-header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--s-5);
    padding-block: var(--s-3);
  }

  .wordmark {
    display: inline-flex;
    align-items: center;
    gap: var(--s-2);
    text-decoration: none;
    font-family: var(--font-sans);
    font-weight: 500;
    font-size: 1.0625rem;
    color: var(--ink);
    letter-spacing: var(--track-tight);
  }
  .wordmark__glyph {
    width: 14px;
    height: 14px;
    background: transparent;
    border: 1.5px solid var(--ink);
    position: relative;
    transform: rotate(45deg);
  }
  .wordmark__glyph::after {
    content: "";
    position: absolute;
    inset: 2px;
    background: var(--accent);
  }

  .site-nav__list {
    list-style: none;
    display: flex;
    gap: var(--s-5);
    padding: 0;
    margin: 0;
  }
  .site-nav__link {
    text-decoration: none;
    color: var(--ink-soft);
    padding: var(--s-2) 0;
    border-bottom: 1px solid transparent;
    transition: border-color 120ms ease, color 120ms ease;
  }
  .site-nav__link:hover { color: var(--ink); }
  .site-nav__link.is-active {
    color: var(--ink);
    border-bottom-color: var(--accent);
  }

  /* ---- Mobile nav toggle (progressive enhancement) ----
   * Hidden by default — only revealed once enhance.js adds .has-js
   * to <html>. Without JS, the nav wraps and stays usable. */
  .nav-toggle {
    display: none;
    align-items: center;
    gap: 2px;
    background: transparent;
    border: 1px solid var(--ink);
    padding: var(--s-2) var(--s-3);
    cursor: pointer;
    color: var(--ink);
    font-family: var(--font-mono);
    font-size: var(--fs-mono);
    letter-spacing: var(--track-mono);
    text-transform: uppercase;
    line-height: 1;
    z-index: 60; /* sits above .site-nav when open */
    position: relative;
  }
  /* Belt-and-braces: explicitly hide on desktop regardless of .has-js state. */
  @media (min-width: 768px) {
    .nav-toggle { display: none !important; }
  }
  .nav-toggle:hover { background: var(--ink); color: var(--bg); }
  .nav-toggle:hover .nav-toggle__bracket,
  .nav-toggle:hover .nav-toggle__label { color: var(--bg); }
  .nav-toggle__bracket { color: var(--ink); }
  .nav-toggle__label { color: var(--ink); }

  @media (max-width: 767px) {
    /* Without JS the nav just wraps neatly. */
    .site-nav__list { gap: var(--s-3); flex-wrap: wrap; justify-content: flex-end; }

    /* With JS: hamburger + fullscreen overlay. */
    .has-js .nav-toggle { display: inline-flex; }

    .has-js .site-nav {
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      bottom: 0;
      width: 100vw;
      height: 100vh;
      height: 100dvh; /* accounts for mobile browser chrome */
      background: var(--bg);
      z-index: 50;
      padding: var(--s-9) var(--gutter) var(--s-7); /* top padding clears the sticky header + toggle */
      overflow-y: auto;
      overscroll-behavior: contain;
      visibility: hidden;
      opacity: 0;
      transform: translateY(-8px);
      transition: opacity 160ms ease, transform 160ms ease, visibility 0s linear 160ms;
    }
    .has-js .site-nav[data-open="true"] {
      visibility: visible;
      opacity: 1;
      transform: translateY(0);
      transition: opacity 160ms ease, transform 160ms ease, visibility 0s linear 0s;
    }

    .has-js .site-nav__list {
      flex-direction: column;
      align-items: flex-start;
      justify-content: flex-start;
      gap: var(--s-4);
      margin-top: var(--s-5);
      width: 100%;
      max-width: var(--container-max);
      margin-inline: auto;
    }

    .has-js .site-nav__link {
      font-family: var(--font-sans);
      font-size: clamp(1.5rem, 7vw, 2.25rem);
      font-weight: 500;
      line-height: 1.15;
      letter-spacing: var(--track-tight);
      text-transform: none;
      color: var(--ink);
      padding: var(--s-1) 0;
      border-bottom: 0;
      text-decoration: none;
      display: inline-block;
    }
    .has-js .site-nav__link:hover {
      background-image: linear-gradient(var(--accent), var(--accent));
      background-size: 100% 0.3em;
      background-repeat: no-repeat;
      background-position: 0 88%;
    }
    .has-js .site-nav__link.is-active {
      background: var(--accent);
      color: var(--accent-ink);
      padding: var(--s-1) 0.15em;
      border-bottom: 0;
    }

    /* Body scroll lock helper */
    body.is-nav-open { overflow: hidden; }
  }

  /* ---- Site footer ---- */
  .site-footer {
    border-top: var(--rule-thin);
    margin-top: var(--s-9);
    background: var(--bg-alt);
  }
  .site-footer__inner {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--s-7);
    padding-block: var(--s-7);
  }
  @media (max-width: 767px) {
    .site-footer__inner { grid-template-columns: 1fr; gap: var(--s-5); }
  }
  .site-footer__mark { margin-bottom: var(--s-3); }
  .site-footer__tag { color: var(--ink-soft); max-width: 52ch; }
  .site-footer__author { margin-top: var(--s-4); }
  .site-footer__nav ul { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: var(--s-2); }
  .site-footer__nav a { text-decoration: none; }
  .site-footer__nav a:hover { color: var(--ink); }
  .site-footer__base {
    border-top: var(--rule-thin);
    padding-block: var(--s-4);
    display: flex;
    justify-content: space-between;
    gap: var(--s-4);
    flex-wrap: wrap;
  }

  /* ---- Hero (home) ---- */
  .hero {
    padding-block: var(--s-8) var(--s-9);
    border-bottom: var(--rule-thin);
  }
  .hero__display {
    font-size: var(--fs-display);
    line-height: var(--lh-tight);
    font-weight: 400;
    letter-spacing: var(--track-tight);
    max-width: 18ch;
  }
  .hero__display .hl {
    background: var(--accent);
    color: var(--accent-ink);
    padding: 0 0.15em;
    box-decoration-break: clone;
  }
  .hero__lede {
    margin-top: var(--s-6);
    color: var(--ink-soft);
    max-width: 56ch;
    font-size: 1.125rem;
  }
  .hero__actions {
    margin-top: var(--s-6);
    display: flex;
    gap: var(--s-4);
    flex-wrap: wrap;
  }

  /* ---- Bracket chip (link-style CTA) ---- */
  .chip {
    display: inline-flex;
    align-items: center;
    gap: var(--s-2);
    border: 1px solid var(--ink);
    padding: var(--s-2) var(--s-4);
    font-family: var(--font-mono);
    font-size: var(--fs-mono);
    letter-spacing: var(--track-mono);
    text-transform: uppercase;
    text-decoration: none;
    color: var(--ink);
    background: var(--bg);
    transition: background 120ms ease, color 120ms ease;
  }
  .chip:hover { background: var(--ink); color: var(--bg); text-decoration: none; }
  .chip--accent { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
  .chip--accent:hover { background: var(--accent-ink); color: var(--accent); border-color: var(--accent-ink); }
  .chip__arrow { font-family: var(--font-mono); }

  .tag-chip {
    display: inline-block;
    border: 1px solid var(--rule-strong);
    padding: 2px var(--s-3);
    color: var(--ink-soft);
    text-decoration: none;
  }
  .tag-chip:hover {
    border-color: var(--ink);
    color: var(--ink);
  }

  /* ---- Latest posts ---- */
  .latest {
    padding-block: var(--s-8);
    border-bottom: var(--rule-thin);
  }
  .latest__header {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    margin-bottom: var(--s-6);
    gap: var(--s-4);
  }
  .latest__heading { font-size: var(--fs-h2); font-weight: 400; letter-spacing: var(--track-tight); }
  .latest__list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    gap: 0;
    border-top: var(--rule-thin);
  }
  .latest__item { border-bottom: var(--rule-thin); }
  .latest__link {
    display: grid;
    grid-template-columns: 100px 1fr auto;
    gap: var(--s-5);
    align-items: baseline;
    padding-block: var(--s-5);
    text-decoration: none;
    color: var(--ink);
  }
  .latest__link:hover .latest__title { background-image: linear-gradient(var(--accent), var(--accent)); }
  .latest__kind { color: var(--ink-quiet); }
  .latest__title {
    font-size: var(--fs-h3);
    font-weight: 500;
    letter-spacing: var(--track-tight);
    background-image: linear-gradient(transparent, transparent);
    background-size: 100% 0.25em;
    background-repeat: no-repeat;
    background-position: 0 88%;
    transition: background-image 120ms ease;
    padding-inline: 2px;
  }
  .latest__date { color: var(--ink-quiet); }
  @media (max-width: 639px) {
    .latest__link { grid-template-columns: 1fr; gap: var(--s-1); }
    .latest__date { grid-row: 3; }
  }

  /* ---- Featured card (Spur-derived) ---- */
  .featured {
    border: var(--rule-thin);
    padding: var(--s-5);
    background: var(--bg);
  }
  .featured__label {
    color: var(--ink-quiet);
    margin-bottom: var(--s-4);
  }
  .featured__title {
    font-size: 1.0625rem;
    font-weight: 500;
    letter-spacing: var(--track-tight);
    margin-bottom: var(--s-3);
  }
  .featured__title a { text-decoration: none; }
  .featured__title a:hover { text-decoration: underline; text-decoration-color: var(--accent); text-decoration-thickness: 3px; }
  .featured__excerpt { color: var(--ink-soft); font-size: var(--fs-small); }
  .featured__more { margin-top: var(--s-4); display: inline-block; }

  /* ---- Categories block ---- */
  .categories {
    padding-block: var(--s-8);
  }
  .categories__list {
    display: flex;
    flex-wrap: wrap;
    gap: var(--s-3);
    list-style: none;
    padding: 0;
    margin-top: var(--s-5);
  }

  /* ---- Page / Post ---- */
  .page, .post { padding-block: var(--s-7) var(--s-9); }
  .page__header, .post__header { margin-bottom: var(--s-7); border-bottom: var(--rule-thin); padding-bottom: var(--s-6); }
  .page__title, .post__title {
    font-size: var(--fs-h1);
    font-weight: 500;
    letter-spacing: var(--track-tight);
    line-height: var(--lh-tight);
    max-width: 22ch;
  }
  .page__lede, .post__lede {
    margin-top: var(--s-4);
    color: var(--ink-soft);
    font-size: 1.125rem;
    max-width: 56ch;
  }
  .post__meta {
    margin-top: var(--s-5);
    display: flex;
    flex-wrap: wrap;
    gap: var(--s-3);
    color: var(--ink-quiet);
  }
  .post__tags {
    margin-top: var(--s-8);
    padding-top: var(--s-6);
    border-top: var(--rule-thin);
  }
  .tag-list {
    list-style: none;
    padding: 0;
    margin-top: var(--s-3);
    display: flex;
    flex-wrap: wrap;
    gap: var(--s-3);
  }

  /* ---- Prose ---- */
  .prose {
    max-width: var(--measure);
  }
  .prose > * + * { margin-top: var(--s-5); }
  .prose h2 {
    font-size: var(--fs-h2);
    margin-top: var(--s-8);
    padding-top: var(--s-5);
    border-top: var(--rule-thin);
    font-weight: 500;
  }
  .prose h3 {
    font-size: var(--fs-h3);
    margin-top: var(--s-6);
    font-weight: 600;
  }
  .prose ul, .prose ol { padding-left: 1.25em; }
  .prose li + li { margin-top: var(--s-2); }
  .prose figure { margin-block: var(--s-6); }
  .prose figcaption { color: var(--ink-quiet); margin-top: var(--s-2); }
  .prose blockquote {
    border-left: 2px solid var(--ink);
    padding-left: var(--s-4);
    margin-block: var(--s-6);
    color: var(--ink-soft);
    font-style: normal;
  }
  .prose a { text-underline-offset: 3px; }
  .prose .header-anchor {
    color: var(--ink);
    text-decoration: none;
  }
  .prose .header-anchor:hover { text-decoration: underline; text-decoration-color: var(--accent); text-decoration-thickness: 3px; }

  /* Footnotes (markdown-it-footnote) */
  .footnotes {
    margin-top: var(--s-8);
    padding-top: var(--s-5);
    border-top: var(--rule-thin);
    font-size: var(--fs-small);
  }
  .footnotes hr { display: none; }
  .footnotes ol { padding-left: 1.5em; }
  .footnotes li + li { margin-top: var(--s-2); }
  .footnote-ref a {
    font-family: var(--font-mono);
    font-size: 0.8em;
    text-decoration: none;
    color: var(--ink-quiet);
  }
  .footnote-ref a:hover { color: var(--ink); }

  /* ---- Test conditions (review only) ---- */
  .test-conditions {
    border: var(--rule-thin);
    padding: var(--s-5);
    background: var(--bg-alt);
    margin-block: var(--s-6);
  }
  .kv__row {
    display: grid;
    grid-template-columns: 180px 1fr;
    gap: var(--s-4);
    padding-block: var(--s-2);
    border-bottom: 1px solid var(--rule);
  }
  .kv__row:last-child { border-bottom: 0; }
  .kv dt { color: var(--ink-quiet); }
  .test-conditions__note { margin-top: var(--s-4); }
  @media (max-width: 639px) {
    .kv__row { grid-template-columns: 1fr; gap: var(--s-1); }
  }

  /* ---- Verdict block ---- */
  .verdict-block {
    margin-top: var(--s-8);
    padding-top: var(--s-6);
    border-top: 2px solid var(--ink);
  }
  .verdict {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: var(--s-6);
    align-items: baseline;
    margin-top: var(--s-4);
  }
  .verdict__rating { display: inline-flex; align-items: baseline; }
  .verdict__score {
    font-family: var(--font-sans);
    font-size: clamp(3rem, 6vw, 4.5rem);
    font-weight: 500;
    letter-spacing: var(--track-tight);
    color: var(--ink);
    text-transform: none;
  }
  .verdict__scale {
    font-family: var(--font-mono);
    font-size: 1rem;
    color: var(--ink-quiet);
    text-transform: uppercase;
  }
  .verdict__summary {
    font-size: 1.125rem;
    color: var(--ink);
    max-width: 48ch;
  }
  .verdict__methodology { margin-top: var(--s-4); }
  @media (max-width: 639px) {
    .verdict { grid-template-columns: 1fr; gap: var(--s-3); }
  }

  /* ---- Stat shortcode ---- */
  .stat {
    border-left: 2px solid var(--accent);
    padding-left: var(--s-4);
    margin-block: var(--s-6);
  }
  .stat__value {
    font-size: clamp(2rem, 5vw, 3rem);
    line-height: var(--lh-tight);
    letter-spacing: var(--track-tight);
    color: var(--ink);
  }
  .stat__label {
    color: var(--ink-soft);
    margin-top: var(--s-2);
    max-width: 36ch;
  }
  .stat__source { margin-top: var(--s-2); }

  /* ---- Callout shortcode ---- */
  .callout {
    border: var(--rule-thin);
    padding: var(--s-4) var(--s-5);
    margin-block: var(--s-6);
    background: var(--bg-alt);
  }
  .callout__label {
    color: var(--ink-quiet);
    margin-bottom: var(--s-2);
  }
  .callout--caveat { border-left: 3px solid #c44; }
  .callout--update { border-left: 3px solid var(--accent); }
  .callout__body > * + * { margin-top: var(--s-3); }

  /* ---- Quote shortcode ---- */
  .quote {
    border-left: 2px solid var(--ink);
    padding-left: var(--s-4);
    margin-block: var(--s-6);
  }
  .quote p { font-size: 1.125rem; max-width: 48ch; }
  .quote cite { display: block; margin-top: var(--s-3); font-style: normal; }

  /* ---- Screenshot shortcode ---- */
  .screenshot {
    margin-block: var(--s-6);
  }
  .screenshot img { width: 100%; border: var(--rule-thin); }
  .screenshot figcaption { margin-top: var(--s-2); color: var(--ink-quiet); }

  /* ---- Compare table ---- */
  .compare-wrap {
    overflow-x: auto;
    margin-block: var(--s-6);
    border: var(--rule-thin);
  }
  .compare {
    width: 100%;
    font-size: var(--fs-small);
  }
  .compare th, .compare td {
    padding: var(--s-3) var(--s-4);
    text-align: left;
    border-bottom: 1px solid var(--rule);
    vertical-align: top;
  }
  .compare thead th {
    background: var(--bg-alt);
    font-family: var(--font-mono);
    font-size: var(--fs-mono);
    text-transform: uppercase;
    letter-spacing: var(--track-mono);
    color: var(--ink-quiet);
    font-weight: 500;
  }
  .compare tbody th {
    font-family: var(--font-mono);
    font-size: var(--fs-mono);
    text-transform: uppercase;
    letter-spacing: var(--track-mono);
    color: var(--ink-quiet);
    font-weight: 500;
    white-space: nowrap;
    border-right: 1px solid var(--rule);
  }
  .compare tbody tr:last-child th,
  .compare tbody tr:last-child td { border-bottom: 0; }

  /* ---- Breadcrumbs ---- */
  .breadcrumbs ol {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-wrap: wrap;
    gap: var(--s-2);
  }
  .breadcrumbs li { display: inline-flex; align-items: center; gap: var(--s-2); }
  .breadcrumbs a { color: var(--ink-quiet); text-decoration: none; }
  .breadcrumbs a:hover { color: var(--ink); }
  .breadcrumbs__sep { color: var(--ink-quiet); }
  .breadcrumbs [aria-current="page"] { color: var(--ink); }

  /* ---- Related ---- */
  .related {
    margin-top: var(--s-8);
    padding-top: var(--s-6);
    border-top: var(--rule-thin);
  }
  .related__list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    gap: 0;
    border-top: var(--rule-thin);
  }
  .related__item { border-bottom: var(--rule-thin); }
  .related__item a {
    display: grid;
    grid-template-columns: 80px 1fr auto;
    gap: var(--s-4);
    padding-block: var(--s-4);
    text-decoration: none;
    color: var(--ink);
    align-items: baseline;
  }
  .related__item a:hover .related__title { background-image: linear-gradient(var(--accent), var(--accent)); }
  .related__kind { color: var(--ink-quiet); }
  .related__title {
    font-weight: 500;
    background-size: 100% 0.25em;
    background-repeat: no-repeat;
    background-position: 0 88%;
  }
  .related__date { color: var(--ink-quiet); }
  @media (max-width: 639px) {
    .related__item a { grid-template-columns: 1fr; gap: var(--s-1); }
  }

  /* ---- References (guide only) ---- */
  .references {
    margin-top: var(--s-8);
    padding-top: var(--s-6);
    border-top: var(--rule-thin);
  }
  .references__list {
    margin-top: var(--s-4);
    padding-left: 1.5em;
    color: var(--ink-soft);
    text-transform: none;
    letter-spacing: 0;
    font-family: var(--font-sans);
    font-size: var(--fs-small);
  }
  .references__list li + li { margin-top: var(--s-2); }
  .references__list a { color: var(--ink); }
  .references__note { color: var(--ink-quiet); }

  /* ---- Category / list pages ---- */
  .list-heading {
    font-size: var(--fs-h1);
    font-weight: 400;
    letter-spacing: var(--track-tight);
    max-width: 22ch;
  }

  /* ---- 404 ---- */
  .notfound {
    text-align: left;
    padding-block: var(--s-9);
  }
  .notfound__code {
    font-size: var(--fs-display);
    line-height: 1;
    letter-spacing: var(--track-tight);
    color: var(--ink);
  }
  .notfound__msg {
    margin-top: var(--s-4);
    color: var(--ink-soft);
    font-size: 1.125rem;
    max-width: 48ch;
  }
}

/* ============================================================
 * UTILITIES
 * ============================================================ */
@layer utilities {
  .sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
  }
  .visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
  }
  .hl { background: var(--accent); color: var(--accent-ink); padding: 0 0.15em; }
  .text-soft { color: var(--ink-soft); }
  .text-quiet { color: var(--ink-quiet); }
  .stack-5 > * + * { margin-top: var(--s-5); }
  .stack-7 > * + * { margin-top: var(--s-7); }
}

/* ============================================================
 * PRINT
 * ============================================================ */
@layer print {
  @media print {
    .site-header, .site-footer, .breadcrumbs, .related, .post__tags { display: none; }
    body { background: white; color: black; font-size: 11pt; }
    a { text-decoration: underline; }
    a[href]::after { content: " (" attr(href) ")"; font-size: 9pt; color: #555; }
    .prose { max-width: none; }
  }
}