/* CluelessAI, cluelessai.ca
   Shared by the landing page and the plain prose pages (/privacy, /terms),
   so every base element style has to stand on its own without a class. */

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

/* ---------------------------------------------------------------- reset */
@layer reset {
  *, *::before, *::after { box-sizing: border-box; }
  body, h1, h2, h3, h4, p, ul, ol, dl, dd, figure, blockquote { margin: 0; }
  ul, ol { padding-inline-start: 1.4em; }
  svg { display: block; }
}

/* ----------------------------------------------------------------- base */
@layer base {
  :root {
    color-scheme: light dark;

    /* --- palette: the page is paper, the hero is a dimmed screen --- */
    --paper:        #e9edf2;
    --paper-2:      #f5f8fb;
    --ink:          #131820;
    --ink-2:        #48525f;
    --rule:         #c6cfda;
    --rule-strong:  #a6b2c1;
    --signal:       #b36a12;   /* amber as a rule or a mark: 3:1 jobs only */
    --signal-ink:   #8a5405;   /* amber as small text: 5.3:1 on --paper */
    --link:         #7a4a05;
    --link-hover:   #4f2f02;
    --edge:         #7b8798;   /* a control outline you can actually see */

    /* the overlay: dark in both themes, because a dimmed screen is dark */
    --screen-bg:    #171c24;
    --screen-line:  #78849550;
    --screen-stroke:#f0a93b;
    --lit-bg:       #f5f8fb;
    --lit-ink:      #10161e;
    --lit-ink-2:    #5c6675;
    --card-bg:      #232a36;
    --card-line:    #3a4453;
    --card-ink:     #e8edf4;
    --card-ink-2:   #a7b2c1;
    --card-edge:    #6f7885;   /* outline control on the answer card, 3.2:1 */

    --select-bg:    #f6d49a;
    --select-ink:   #1a1206;

    /* the download action: the selection amber, filled in. One colour, one job,
       so a download button is recognisable anywhere on the page. */
    --action:       #e59a24;
    --action-ink:   #1f1401;

    /* --- type --- */
    --font-display: Archivo, "Helvetica Neue", Arial, sans-serif;
    --font-body:    "Source Serif 4", "Iowan Old Style", Georgia, "Times New Roman", serif;
    --font-mono:    "IBM Plex Mono", ui-monospace, "SF Mono", Menlo, Consolas, monospace;

    --t--1: clamp(0.8rem, 0.77rem + 0.14vw, 0.875rem);
    --t-0:  clamp(1rem, 0.96rem + 0.2vw, 1.125rem);
    --t-1:  clamp(1.15rem, 1.08rem + 0.35vw, 1.375rem);
    --t-2:  clamp(1.4rem, 1.25rem + 0.75vw, 1.95rem);
    --t-3:  clamp(1.7rem, 1.45rem + 1.2vw, 2.5rem);
    --t-4:  clamp(1.8rem, 1.2rem + 2.95vw, 4.1rem);

    /* --- space --- */
    --gutter:   clamp(1rem, 4vw, 2.5rem);
    --band:     clamp(2.75rem, 6vw, 4.75rem);
    /* One radius scale, by the size of the thing: small controls, buttons and
       inner surfaces, then containers. The two selection rectangles sit outside
       it at 4px on purpose, because a dragged marquee is very nearly sharp. */
    --radius-s: 6px;
    --radius:   10px;
    --radius-l: 18px;

    accent-color: var(--signal);
    scrollbar-color: var(--rule-strong) var(--paper);
  }

  @media (prefers-color-scheme: dark) {
    :root {
      --paper:        #0e1116;
      --paper-2:      #171d25;
      --ink:          #e9eef5;
      --ink-2:        #a0aab8;
      --rule:         #262d38;
      --rule-strong:  #3a4450;
      --signal:       #efa43c;
      --signal-ink:   #efa43c;
      --link:         #f0b25a;
      --link-hover:   #f8cd8c;
      --edge:         #5e6b7a;

      --screen-bg:    #05070a;
      --screen-line:  #6b768550;
      --lit-bg:       #1a212a;
      --lit-ink:      #eef3f9;
      --lit-ink-2:    #99a4b3;
      --card-bg:      #1b222c;
      --card-line:    #333d4b;
      --card-edge:    #6f7885;

      --select-bg:    #7a5312;
      --select-ink:   #fdf3e2;

      --action:       #f0a93b;
      --action-ink:   #1c1200;
    }
  }

  html { -webkit-text-size-adjust: 100%; }

  body:not(:has(> header)) { padding-block-start: var(--band); }
  body:not(:has(> footer)) { padding-block-end: var(--band); }
  body > :first-child:where(h1, h2, h3, p) { margin-block-start: 0; }

  body {
    background: var(--paper);
    color: var(--ink);
    font-family: var(--font-body);
    font-size: var(--t-0);
    font-optical-sizing: auto;
    font-size-adjust: from-font;
    line-height: 1.62;
    overflow-x: clip;
  }

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

  h1, h2, h3, h4 {
    font-family: var(--font-display);
    font-weight: 700;
    font-variation-settings: "wdth" 108;
    line-height: 1.1;
    letter-spacing: -0.018em;
    text-wrap: balance;
  }
  h1 { font-size: var(--t-4); font-weight: 800; font-variation-settings: "wdth" 112; letter-spacing: -0.028em; line-height: 1.04; margin-block: 0 0.55em; }
  h2 { font-size: var(--t-3); margin-block: 2.2em 0.65em; }
  h3 { font-size: var(--t-1); margin-block: 2em 0.4em; letter-spacing: -0.01em; }
  h4 { font-size: var(--t-0); margin-block: 1.75em 0.3em; }

  p, ul, ol, dl, blockquote, table { margin-block: 0 1.05em; }
  p, li, dd, blockquote { text-wrap: pretty; max-inline-size: 66ch; }
  li { margin-block-end: 0.35em; }
  dt { font-weight: 600; }
  dd { margin-inline-start: 1.4em; margin-block-end: 0.8em; }

  blockquote {
    border-inline-start: 2px solid var(--signal);
    padding-inline-start: 1em;
    color: var(--ink-2);
  }

  hr { border: 0; border-block-start: 1px solid var(--rule); margin-block: var(--band); }

  a { color: var(--link); text-decoration-thickness: 1px; text-underline-offset: 0.16em; }
  a:hover { color: var(--link-hover); text-decoration-thickness: 2px; }

  strong { font-weight: 600; }

  code, kbd, samp, pre {
    font-family: var(--font-mono);
    font-size: 0.88em;
  }
  code { overflow-wrap: break-word; }
  pre { overflow-x: auto; padding: 1em; background: var(--paper-2); border: 1px solid var(--rule); border-radius: var(--radius); }
  pre code { font-size: 1em; }

  kbd {
    display: inline-block;
    padding: 0.1em 0.42em;
    border: 1px solid var(--rule-strong);
    border-block-end-width: 2px;
    border-radius: var(--radius-s);
    background: var(--paper-2);
    color: var(--ink);
    font-size: 0.78em;
    line-height: 1.5;
    white-space: nowrap;
  }
  kbd + kbd { margin-inline-start: 0.2em; }

  table { border-collapse: collapse; }
  th, td { text-align: start; padding: 0.5em 0.9em 0.5em 0; border-block-end: 1px solid var(--rule); }
  caption { text-align: start; color: var(--ink-2); padding-block-end: 0.5em; }
}

/* --------------------------------------------------------------- layout */
@layer layout {
  :root {
    /* One shared column system: a readable centre, wide rails, full bleed. */
    --page-cols:
      [full-start] minmax(var(--gutter), 1fr)
      [wide-start] minmax(0, 14rem)
      [content-start] min(38rem, 100% - var(--gutter) * 2) [content-end]
      minmax(0, 14rem) [wide-end]
      minmax(var(--gutter), 1fr) [full-end];
  }

  body, main { display: grid; grid-template-columns: var(--page-cols); align-content: start; }

  /* Zero specificity, so anything below can opt out of the reading column. */
  :where(body > *, main > *) { grid-column: content; }

  main { grid-column: full; }
  .wide { grid-column: wide; }
  .full { grid-column: full; }

  main > section { padding-block: var(--band); scroll-margin-block-start: 5.25rem; }
  main > section + section { border-block-start: 1px solid var(--rule); }
  main > section.hero { padding-block: clamp(0.9rem, 2.5vw, 2rem) var(--band); border-block-start: 0; }

  /* Every section is labelled in the margin, the way a spec sheet is. */
  .cols {
    display: grid;
    grid-template-columns: [label] minmax(0, 14rem) [body] minmax(0, 1fr);
    column-gap: clamp(1.5rem, 4vw, 3.5rem);
    align-content: start;
  }
  .cols > h2 { grid-column: label; font-size: var(--t-2); margin-block: 0 1rem; }
  /* a tick in the margin, the way a spec sheet marks a clause */
  .cols > h2::before {
    content: "";
    display: block;
    inline-size: 1.9rem;
    margin-block-end: 0.85rem;
    border-block-start: 2px solid var(--signal);
  }
  .col-body { grid-column: body; }
  .col-body > :first-child { margin-block-start: 0; }
  .col-body > :last-child { margin-block-end: 0; }

  /* the label rides along beside its section, so you always know where you are */
  @media (width >= 62rem) {
    .cols > h2 { position: sticky; inset-block-start: 5.75rem; }
  }
  @media (width < 62rem) {
    .cols { grid-template-columns: minmax(0, 1fr); }
    .cols > h2, .col-body { grid-column: 1; }
  }

  /* Sticky at every width: the download stays reachable for the whole read. */
  .site-head {
    position: sticky;
    inset-block-start: 0;
    z-index: 10;
    background: color-mix(in oklab, var(--paper) 93%, transparent);
    backdrop-filter: saturate(1.6) blur(14px);
    border-block-end: 1px solid var(--rule);
  }
  .head-inner, .foot-inner {
    max-inline-size: 74rem;
    margin-inline: auto;
    padding-inline: var(--gutter);
  }
  .head-inner {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem 1.5rem;
    padding-block: 0.6rem;
  }
  /* the section list and the download button travel together, on the right */
  .head-sections { margin-inline-start: auto; }

  /* On a narrow screen the action beats the index: the section list goes,
     the download button stays and takes over the right edge. Source order
     matters here, so this sits after the rules it overrides. */
  @media (width < 48rem) {
    .head-sections { display: none; }
    .head-inner { padding-block: 0.5rem; }
    .head-cta { margin-inline-start: auto; }
  }

  .site-foot { border-block-start: 1px solid var(--rule); background: var(--paper-2); }
  .foot-inner {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: 0.6rem 2rem;
    padding-block: 2rem 2.5rem;
  }
  .foot-inner > :last-child { margin-inline-start: auto; }
}

/* ----------------------------------------------------------- components */
@layer components {

  /* --- header / footer chrome --- */
  .brand, .foot-brand {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-family: var(--font-display);
    font-weight: 700;
    font-variation-settings: "wdth" 112;
    letter-spacing: -0.01em;
    color: var(--ink);
    text-decoration: none;
  }
  .brand-name { font-size: 1.06rem; }
  .brand-ai { color: var(--ink-2); font-weight: 500; }
  .brand-dot { fill: var(--signal); }
  .brand:hover { color: var(--ink); }
  .brand:hover .brand-mark { color: var(--signal); }
  .foot-brand { margin: 0; }

  .head-nav, .foot-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 0.25rem 1.25rem;
    margin: 0;
    padding: 0;
    list-style: none;
  }
  .head-nav { font-family: var(--font-mono); font-size: var(--t--1); }
  .head-nav li, .foot-nav li { margin: 0; }
  .head-nav a {
    display: block;
    padding-block: 0.35rem;
    color: var(--ink-2);
    text-decoration: none;
    border-block-end: 1px solid transparent;
  }
  .head-nav a { transition: color 160ms ease, border-color 160ms ease; }
  .head-nav a:hover { color: var(--ink); border-block-end-color: var(--signal); }

  /* the persistent download: small, filled, never off screen */
  .head-cta {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    padding: 0.42rem 0.85rem;
    border-radius: var(--radius-s);
    background: var(--action);
    color: var(--action-ink);
    font-family: var(--font-display);
    font-weight: 600;
    font-variation-settings: "wdth" 106;
    font-size: var(--t--1);
    letter-spacing: 0.005em;
    text-decoration: none;
    white-space: nowrap;
  }
  .head-cta { transition: background-color 160ms ease, translate 110ms ease; }
  .head-cta:hover {
    background: color-mix(in oklab, var(--action) 86%, white);
    color: var(--action-ink);
    outline: 2px dashed var(--signal);
    outline-offset: 3px;
  }
  .head-cta:active { translate: 0 1px; }
  .dl-icon { flex: none; }

  .foot-nav { font-size: var(--t--1); }

  /* Sits on its own row above the brand and the links. Placed FIRST in the
     flex container on purpose: .foot-inner aligns its last child to the end,
     and appending here would have stolen that from the nav. */
  .foot-free {
    flex: 1 0 100%;
    /* p is capped at 66ch globally for line length; without lifting that the
       flex basis is ignored in practice and the brand sits on this row. */
    max-inline-size: none;
    margin: 0 0 0.35rem;
    font-family: var(--font-mono);
    font-size: var(--t--1);
    color: var(--signal-ink);
  }
  .colophon { margin: 0; color: var(--ink-2); font-size: var(--t--1); }
  .colophon small { font-size: 1em; }

  /* --- the hero: a dimmed screen with one region drawn on it ---------- */
  .screen {
    position: relative;
    isolation: isolate;
    overflow: hidden;
    padding: clamp(1rem, 3.5vw, 2.75rem);
    padding-block-end: clamp(1.35rem, 3.5vw, 2.75rem);
    border-radius: var(--radius-l);
    background: var(--screen-bg);
    box-shadow: 0 1px 2px #0003, 0 18px 44px -22px #00000059;
  }

  .screen-chrome {
    position: absolute;
    inset: 0;
    z-index: 0;
    padding: inherit;
    pointer-events: none;
  }
  .chrome-bar { display: flex; align-items: center; gap: 0.4rem; margin-block-end: 1.5rem; }
  .chrome-bar span {
    inline-size: 0.55rem;
    block-size: 0.55rem;
    border-radius: 50%;
    background: var(--screen-line);
  }
  .chrome-bar b {
    block-size: 0.55rem;
    inline-size: 34%;
    margin-inline-start: 0.8rem;
    border-radius: 3px;
    background: var(--screen-line);
  }
  .chrome-lines { display: flex; flex-direction: column; gap: 0.85rem; }
  .chrome-lines span {
    block-size: 0.5rem;
    border-radius: 3px;
    background: var(--screen-line);
  }
  .chrome-lines span:nth-child(8n + 1) { inline-size: 46%; }
  .chrome-lines span:nth-child(8n + 2) { inline-size: 88%; }
  .chrome-lines span:nth-child(8n + 3) { inline-size: 79%; }
  .chrome-lines span:nth-child(8n + 4) { inline-size: 92%; }
  .chrome-lines span:nth-child(8n + 5) { inline-size: 61%; }
  .chrome-lines span:nth-child(8n + 6) { inline-size: 85%; }
  .chrome-lines span:nth-child(8n + 7) { inline-size: 71%; }
  .chrome-lines span:nth-child(8n) { inline-size: 49%; }

  /* the selection rectangle, reused for the honesty panel */
  .boxed { --box-width: 1px; position: relative; border: var(--box-width) dashed var(--box-stroke); }
  .ticks { position: absolute; inset: 0; pointer-events: none; }
  .boxed::before, .boxed::after,
  .boxed > .ticks::before, .boxed > .ticks::after {
    content: "";
    position: absolute;
    inline-size: 0.85rem;
    block-size: 0.85rem;
    border: 2px solid var(--box-stroke);
  }
  .boxed::before { inset-block-start: 5px; inset-inline-start: 5px; border-inline-end: 0; border-block-end: 0; }
  .boxed::after { inset-block-end: 5px; inset-inline-end: 5px; border-inline-start: 0; border-block-start: 0; }
  .boxed > .ticks::before { inset-block-start: 5px; inset-inline-end: 5px; border-inline-start: 0; border-block-end: 0; }
  .boxed > .ticks::after { inset-block-end: 5px; inset-inline-start: 5px; border-inline-end: 0; border-block-start: 0; }

  .marquee {
    --box-stroke: var(--screen-stroke);
    --box-width: 2px;
    position: relative;
    z-index: 1;
    margin-block-start: clamp(0.9rem, 3.5vw, 2.4rem);
    padding: clamp(1.05rem, 3vw, 1.9rem);
    background: var(--lit-bg);
    color: var(--lit-ink);
    border-radius: 4px;
    /* the headline is the last thing in the box, so no trailing margin */
    animation: drag-region 520ms cubic-bezier(0.2, 0.72, 0.28, 1) both;
  }
  .marquee h1 { color: inherit; margin-block: 0; }

  .hud {
    display: flex;
    align-items: center;
    gap: 0.2rem;
    margin-block-end: 0.9rem;
    max-inline-size: none;
  }
  .hud kbd { background: transparent; border-color: var(--lit-ink-2); color: var(--lit-ink-2); font-size: 0.7rem; }
  .hud--win { display: none; }
  :root[data-os="win"] .hud--mac { display: none; }
  :root[data-os="win"] .hud--win { display: flex; }

  .answer {
    position: relative;
    z-index: 2;
    inline-size: min(36rem, 100%);
    margin-inline-start: auto;
    margin-block-start: clamp(-1.15rem, -3vw + 0.4rem, 0.75rem);
    padding: 0.9rem 1.1rem 1.05rem;
    border: 1px solid var(--card-line);
    border-radius: var(--radius);
    background: var(--card-bg);
    color: var(--card-ink);
    box-shadow: 0 16px 40px -18px #000000b3;
    animation: rise 420ms 480ms both cubic-bezier(0.2, 0.72, 0.28, 1);
  }
  /* Scoped to the meta line only: a bare `.answer a` would out-specify .btn
     and repaint the download buttons' labels. */
  .get-meta a { color: var(--screen-stroke); }
  .get-meta a:hover { color: #f9d295; }   /* fixed: the card is dark in both themes */
  .answer .btn:hover { outline-color: var(--card-ink); }
  .answer-head { margin-block-end: 0.5rem; max-inline-size: none; }
  .answer-name {
    font-family: var(--font-mono);
    font-size: var(--t--1);
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--card-ink-2);
  }
  .answer-body {
    margin: 0;
    max-inline-size: none;
    font-size: var(--t--1);
    line-height: 1.6;
    color: var(--card-ink);
    animation: stream 760ms 620ms linear both;
  }
  .caret {
    display: inline-block;
    inline-size: 0.42em;
    block-size: 1em;
    margin-inline-start: 0.15em;
    translate: 0 0.15em;
    background: var(--screen-stroke);
    animation: blink 820ms 1380ms 4 steps(1, end) both;
  }

  @keyframes drag-region {
    from { clip-path: inset(0 100% 100% 0); }
    to   { clip-path: inset(0 0 0 0); }
  }
  @keyframes rise {
    from { opacity: 0; translate: 0 10px; }
    to   { opacity: 1; translate: 0 0; }
  }
  @keyframes stream {
    from { clip-path: inset(0 0 100% 0); }
    to   { clip-path: inset(0 0 0 0); }
  }
  @keyframes blink { 0%, 49% { opacity: 1; } 50%, 100% { opacity: 0; } }

  /* --- the download, where the hero's gesture lands ------------------- */
  .get {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem;
    margin-block-start: 0.95rem;
    padding-block-start: 0.95rem;
    border-block-start: 1px solid var(--card-line);
  }
  /* Both labels stay on one line: if the pair cannot sit side by side they
     stack, which reads better than a button breaking mid-label. */
  .get .btn { flex: 1 1 12rem; min-block-size: 2.9rem; padding-inline: 1rem; white-space: nowrap; }

  /* Which build leads. The hero and the download section run this same rule,
     so scrolling never lands you in a second, differently-argued hierarchy.
     An unknown platform is a real state with its own answer: promote neither,
     show the pair as a pair, and let the reader pick. */

  /* no JS, or an OS we do not recognise: an amber-outlined pair, no primary */
  :root:not([data-os="mac"]):not([data-os="win"]) :is(.answer, .get) .go {
    --btn-bg: transparent;
    --btn-ink: var(--card-ink);
    --btn-edge: var(--screen-stroke);
    --btn-bg-hover: color-mix(in oklab, var(--screen-stroke) 16%, transparent);
  }
  /* known platform: yours is filled and first, the other steps back to grey */
  :root[data-os="win"] :is(.answer, .get) .go--win { order: -1; }
  /* Scoped to the two blocks that own the platform pair. These set --btn-ink to
     --card-ink, which is the ANSWER CARD's text colour: correct on the dark
     card, invisible on any light surface. Unscoped, every later page that
     reused .go--win got a button with no readable label. */
  :root[data-os="mac"] :is(.answer, .get) .go--win,
  :root[data-os="win"] :is(.answer, .get) .go--mac {
    flex: 0 1 auto;
    --btn-bg: transparent;
    --btn-ink: var(--card-ink);
    --btn-edge: var(--card-edge);
    --btn-bg-hover: color-mix(in oklab, var(--card-ink) 10%, transparent);
  }

  /* The Windows caveat rides with the Windows button, not three screens down.
     A visitor cannot start that download without having been told. */
  .get-caution {
    margin-block: 0.9rem 0;
    max-inline-size: none;
    padding-inline-start: 0.8rem;
    border-inline-start: 2px solid var(--screen-stroke);
    font-family: var(--font-mono);
    font-size: 0.76rem;
    line-height: 1.55;
    color: var(--card-ink);
  }
  .get-caution a { color: var(--screen-stroke); }
  .get-caution a:hover { color: #f9d295; }

  .get-meta {
    margin-block: 0.7rem 0;
    max-inline-size: none;
    font-family: var(--font-mono);
    font-size: 0.76rem;
    line-height: 1.55;
    color: var(--card-ink-2);
  }

  /* --- downloads ----------------------------------------------------- */
  .lede { font-size: var(--t-1); color: var(--ink-2); margin-block-end: 1.6em; }

  .platforms {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(19rem, 100%), 1fr));
    gap: 1.25rem;
  }
  .card {
    padding: clamp(1.1rem, 3vw, 1.75rem);
    border: 1px solid var(--rule);
    border-radius: var(--radius-l);
    background: var(--paper-2);
  }
  .card h3 { margin-block: 0 0.9rem; font-size: var(--t-1); }

  /* The hero's rule again, one screen later, so the two agree. Without it both
     cards shipped a filled amber button and the section had two primaries. */
  :root:not([data-os="mac"]):not([data-os="win"]) .platforms .btn {
    --btn-bg: transparent;
    --btn-ink: var(--ink);
    --btn-edge: var(--signal);
    --btn-bg-hover: color-mix(in oklab, var(--signal) 14%, transparent);
  }
  :root[data-os="mac"] .card--win .btn,
  :root[data-os="win"] .card--mac .btn {
    --btn-bg: transparent;
    --btn-ink: var(--ink);
    --btn-edge: var(--edge);
    --btn-bg-hover: color-mix(in oklab, var(--ink) 7%, transparent);
  }

  /* One button, three weights, set through four variables rather than through
     a pile of overrides. Filled amber says "this is your build"; an amber
     outline says "we do not know which is yours, so pick"; a grey outline says
     "the other one". Exactly one of the three can be filled at a time, which is
     what keeps the hero and the download section telling the same story. */
  .btn {
    --btn-bg:       var(--action);
    --btn-ink:      var(--action-ink);
    --btn-edge:     transparent;
    --btn-bg-hover: color-mix(in oklab, var(--action) 86%, white);

    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.55rem;
    min-block-size: 3.15rem;
    padding: 0.5rem 1.3rem;
    border: 1px solid var(--btn-edge);
    border-radius: var(--radius);
    background: var(--btn-bg);
    color: var(--btn-ink);
    font-family: var(--font-display);
    font-weight: 600;
    font-variation-settings: "wdth" 106;
    font-size: var(--t-0);
    letter-spacing: -0.005em;
    text-align: center;
    text-decoration: none;
    transition: background-color 160ms ease, border-color 160ms ease,
                color 160ms ease, translate 110ms ease;
  }
  .btn:hover {
    background: var(--btn-bg-hover);
    color: var(--btn-ink);
    outline: 2px dashed var(--ink);
    outline-offset: 4px;
  }
  .btn:active { translate: 0 1px; }

  /* the two outline weights */
  .btn--pick {
    --btn-bg: transparent;
    --btn-ink: var(--ink);
    --btn-edge: var(--signal);
    --btn-bg-hover: color-mix(in oklab, var(--signal) 14%, transparent);
  }
  .btn--quiet {
    --btn-bg: transparent;
    --btn-ink: var(--ink);
    --btn-edge: var(--edge);
    --btn-bg-hover: color-mix(in oklab, var(--ink) 7%, transparent);
    min-block-size: 2.9rem;
  }
  .btn--quiet:hover { outline-color: var(--signal); }

  .yours {
    display: none;
    margin-block: 0.7rem 0;
    font-family: var(--font-mono);
    font-size: var(--t--1);
    color: var(--signal-ink);
  }
  :root[data-os="mac"] .card--mac .yours,
  :root[data-os="win"] .card--win .yours { display: block; }
  :root[data-os="mac"] .card--mac,
  :root[data-os="win"] .card--win { border-color: var(--signal); }
  :root[data-os="win"] .card--win { order: -1; }

  .facts {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 0.3rem 1rem;
    margin-block: 1.25rem 1.1rem;
    padding-block-start: 1.1rem;
    border-block-start: 1px solid var(--rule);
    font-size: var(--t--1);
  }
  .facts dt {
    font-family: var(--font-mono);
    font-weight: 400;
    font-size: 0.82em;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--ink-2);
    padding-block-start: 0.25em;
  }
  .facts dd { margin: 0; max-inline-size: none; overflow-wrap: anywhere; }
  .facts code { color: var(--ink); }

  .card-note { font-size: var(--t--1); color: var(--ink-2); margin-block-end: 0; }
  .card-note strong { color: var(--ink); }

  /* --- steps: a real sequence, so it is really numbered --------------- */
  .steps {
    counter-reset: step;
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    gap: 1.75rem;
    grid-template-columns: repeat(auto-fit, minmax(min(13.5rem, 100%), 1fr));
  }
  .steps > li { counter-increment: step; margin: 0; max-inline-size: none; }
  .steps > li::before {
    content: counter(step);
    display: block;
    margin-block-end: 0.7rem;
    padding-block-end: 0.6rem;
    border-block-end: 1px solid var(--rule);
    font-family: var(--font-mono);
    font-size: var(--t--1);
    color: var(--signal-ink);
  }
  .steps h3 { margin-block: 0 0.35em; font-size: var(--t-1); }
  .steps p { margin-block-end: 0; color: var(--ink-2); }

  /* --- traits --------------------------------------------------------- */
  .traits {
    display: grid;
    gap: 1.5rem 2.5rem;
    grid-template-columns: repeat(auto-fit, minmax(min(14.5rem, 100%), 1fr));
    margin-block-end: 0;
  }
  .traits > div { break-inside: avoid; }
  .traits dt {
    font-family: var(--font-display);
    font-weight: 600;
    font-variation-settings: "wdth" 104;
    font-size: var(--t-0);
    letter-spacing: -0.01em;
    margin-block-end: 0.3em;
  }
  .traits dd { margin: 0; color: var(--ink-2); font-size: var(--t--1); }

  /* --- permissions ---------------------------------------------------- */
  .perms { margin-block: 1.1em 1.4em; }
  .perms dt { margin-block-start: 1em; }
  .perms dt:first-child { margin-block-start: 0; }
  .perms dd { margin-inline-start: 0; padding-inline-start: 1em; border-inline-start: 2px solid var(--rule); color: var(--ink-2); }
  .tag {
    display: inline-block;
    margin-inline-start: 0.5em;
    padding: 0.1em 0.5em;
    border: 1px solid var(--edge);
    border-radius: var(--radius-s);
    font-family: var(--font-mono);
    font-size: 0.68em;
    font-weight: 400;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--ink-2);
    vertical-align: 0.15em;
  }
  .tag--req { border-color: var(--signal); color: var(--signal-ink); }

  /* --- the honesty panel: literally boxed, so it is read -------------- */
  .marked {
    --box-stroke: var(--signal);
    padding: clamp(1.4rem, 4vw, 2.25rem);
    border-radius: 4px;
    background: var(--paper-2);
  }
  .marked p { max-inline-size: 64ch; }
  .marked p:last-child { margin-block-end: 0; }

  .keys { white-space: nowrap; }

  /* --- closing ------------------------------------------------------- */
  .closing-links {
    display: flex;
    flex-wrap: wrap;
    gap: 0.85rem;
    max-inline-size: none;
    margin-block: 1.6em 1.1em;
  }
  .closing-links .btn { flex: 0 1 auto; padding-inline: 1.5rem; }
  .closing-note { font-size: var(--t--1); color: var(--ink-2); margin-block-end: 0; }
}

/* ------------------------------------------------------------ utilities */
@layer utilities {
  .visually-hidden:where(:not(:focus-within, :active)) {
    position: absolute !important;
    clip-path: inset(50%) !important;
    overflow: hidden !important;
    inline-size: 1px !important;
    block-size: 1px !important;
    margin: -1px !important;
    padding: 0 !important;
    border: 0 !important;
    white-space: nowrap !important;
  }

  .skip-link {
    position: absolute;
    inset-block-start: -100%;
    inset-inline-start: var(--gutter);
    z-index: 20;
    padding: 0.7rem 1.1rem;
    background: var(--ink);
    color: var(--paper);
    border-radius: 0 0 var(--radius) var(--radius);
    font-family: var(--font-mono);
    font-size: var(--t--1);
    text-decoration: none;
  }
  .skip-link:focus { inset-block-start: 0; color: var(--paper); }

  a:focus-visible,
  button:focus-visible,
  [tabindex]:focus-visible,
  summary:focus-visible {
    outline: 3px solid var(--signal);
    outline-offset: 3px;
    border-radius: 3px;
  }
  main:focus-visible { outline-offset: -3px; }

  /* A filled amber button needs a ring that is not also amber. */
  .btn:focus-visible, .head-cta:focus-visible { outline-color: var(--ink); }
  .answer .btn:focus-visible { outline-color: var(--card-ink); }

  @media (forced-colors: active) {
    .btn, .head-cta { border: 1px solid ButtonText; }
    .boxed, .card, .answer { border-color: CanvasText; }
    a:focus-visible, button:focus-visible, [tabindex]:focus-visible { outline-color: Highlight; }
  }

  @media (prefers-reduced-motion: no-preference) {
    html { scroll-behavior: smooth; }
  }

  @media (prefers-reduced-motion: reduce) {
    .marquee, .answer, .answer-body { animation: none; }
    .caret { animation: none; opacity: 0; }
    .site-head { backdrop-filter: none; }
    .btn, .head-cta, .head-nav a { transition-duration: 1ms; }
    .btn:active, .head-cta:active { translate: none; }
  }
}

/* ---- /windows-help : a recovery document, not a pitch ---- */
.doc { max-width: 46rem; padding-block: clamp(2.5rem, 6vw, 4.5rem); }
.doc h2 { margin-block: 2.25rem 0.75rem; }
.doc h3 { margin-block: 0 0.4rem; }
.doc .lede { margin-bottom: 0.5rem; }
.steps {
  /* An inherited `ol` rule lays lists out in two columns, which silently
     reorders a numbered sequence of instructions. Steps are one column. */
  display: block;
  columns: 1;
  grid-template-columns: none;
  list-style: none;
  counter-reset: step;
  padding: 0;
  margin: 1.25rem 0 0;
}
.steps > li {
  counter-increment: step;
  position: relative;
  padding: 1.1rem 0 1.1rem 3rem;
  border-top: 1px solid var(--edge);
}
.steps > li::before {
  content: counter(step);
  position: absolute; left: 0; top: 1.1rem;
  font-family: var(--font-mono); font-size: 0.85rem;
  color: var(--signal-ink);
  border: 1px solid var(--edge);
  border-radius: var(--radius-s);
  width: 1.9rem; height: 1.9rem;
  display: grid; place-items: center;
}
.dl-pair { display: flex; flex-wrap: wrap; gap: 0.6rem; margin: 0.9rem 0 0.5rem; }
.fineprint { font-size: 0.92rem; color: var(--ink-2); }
.fingerprint {
  display: inline-block; word-break: break-all;
  font-size: 0.85rem; padding: 0.4rem 0.6rem;
  border: 1px solid var(--edge); border-radius: var(--radius-s);
}