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

@layer reset {
  *, *::before, *::after { box-sizing: border-box; }
  html { -webkit-text-size-adjust: 100%; }
  body, h1, h2, h3, p, ul { margin: 0; }
  ul { padding: 0; }
  img, svg { display: block; max-width: 100%; }
  button, input, textarea, select { font: inherit; }
}

@layer tokens {
  :root {
    color-scheme: light dark;
    --font-sans: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    --font-display: var(--font-sans);
    --color-canvas: #ffffff;
    --color-surface: #ffffff;
    --color-surface-soft: #f6f6f4;
    --color-text: #171717;
    --color-muted: #626262;
    --color-border: #dededb;
    --color-accent: #171717;
    --color-accent-strong: #171717;
    --color-focus: #1d5fbf;
    --shadow-soft: none;
    --radius-sm: 0;
    --radius-md: 0;
    --radius-lg: 0;
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.5rem;
    --space-6: 2rem;
    --space-7: 3rem;
    --space-8: 4.5rem;
    --content-width: 72rem;
    --measure: 46rem;
  }

  @media (prefers-color-scheme: dark) {
    :root {
      --color-canvas: #151515;
      --color-surface: #151515;
      --color-surface-soft: #242424;
      --color-text: #f2f2ef;
      --color-muted: #b7b7b2;
      --color-border: #41413e;
      --color-accent: #f2f2ef;
      --color-accent-strong: #f2f2ef;
      --color-focus: #78adff;
    }
  }
}

@layer base {
  html { scroll-behavior: smooth; scroll-padding-top: var(--space-5); }
  body {
    min-height: 100vh;
    background: var(--color-canvas);
    color: var(--color-text);
    font-family: var(--font-sans);
    font-size: 1rem;
    line-height: 1.65;
  }
  a { color: var(--color-accent-strong); text-decoration-thickness: 0.08em; text-underline-offset: 0.2em; }
  a:hover { text-decoration-thickness: 0.14em; }
  :focus-visible { outline: 3px solid var(--color-focus); outline-offset: 3px; }
  h1, h2, h3 { font-family: var(--font-display); line-height: 1.15; }
  h1 { font-size: clamp(2.25rem, 6vw, 4.25rem); }
  h2 { font-size: clamp(1.45rem, 2.5vw, 2rem); }
  h3 { font-size: 1.25rem; }
}

@layer components {
  .container { width: min(100% - 2rem, var(--content-width)); margin-inline: auto; }
  .measure { max-width: var(--measure); }
  .skip-link {
    position: fixed; z-index: 10; top: var(--space-3); left: var(--space-3);
    padding: var(--space-2) var(--space-4);
    background: var(--color-text); color: var(--color-canvas); transform: translateY(-180%);
  }
  .skip-link:focus { transform: translateY(0); }
  .site-header { border-bottom: 1px solid var(--color-border); }
  .header-inner { min-height: 4rem; display: flex; align-items: center; justify-content: space-between; gap: var(--space-5); }
  .header-actions { display: flex; align-items: center; gap: var(--space-3); }
  .brand { display: inline-flex; align-items: center; gap: var(--space-2); color: var(--color-text); font-weight: 700; letter-spacing: -0.025em; text-decoration: none; }
  .brand-icon { width: 1.75rem; height: 1.75rem; }
  .nav-list { display: flex; gap: var(--space-3); list-style: none; }
  .nav-list a { display: block; padding: var(--space-3) 0; border-bottom: 1px solid transparent; color: var(--color-muted); text-decoration: none; }
  .nav-list a:hover, .nav-list a[aria-current="page"] { border-color: currentColor; background: transparent; color: var(--color-text); }
  .mobile-nav { display: none; position: relative; }
  .mobile-nav summary { min-height: 2.75rem; display: flex; align-items: center; cursor: pointer; font-weight: 700; }
  .mobile-nav nav { position: absolute; right: 0; width: 14rem; margin-top: var(--space-3); padding: var(--space-3); border: 1px solid var(--color-border); background: var(--color-surface); }
  .mobile-nav ul { list-style: none; }
  .mobile-nav a { display: block; padding: var(--space-2) 0; text-decoration: none; }
  .mobile-nav a[aria-current="page"] { text-decoration: underline; }
  .language-switcher { display: flex; }
  .language-switcher a { padding: var(--space-3) 0; color: var(--color-text); font-size: 0.75rem; font-weight: 700; letter-spacing: 0.08em; text-decoration: none; }
  .language-switcher a:hover { text-decoration: underline; }
  .page-hero { padding-block: clamp(var(--space-7), 9vw, 6rem); border-bottom: 1px solid var(--color-border); }
  .hub-hero, .app-hero { padding-block: clamp(var(--space-7), 10vw, 7rem); border-bottom: 1px solid var(--color-border); }
  .app-hero__inner { display: grid; grid-template-columns: auto minmax(0, 1fr); column-gap: var(--space-5); max-width: var(--measure); }
  .app-hero__inner > .eyebrow { grid-column: 2; }
  .app-hero__icon { grid-column: 1; grid-row: 2; width: clamp(4rem, 10vw, 6rem); height: clamp(4rem, 10vw, 6rem); }
  .app-hero__content { grid-column: 2; grid-row: 2; }
  .app-hero__platforms { margin-top: var(--space-3); color: var(--color-muted); font-size: 0.9rem; }
  .app-hero__actions { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-4); margin-top: var(--space-5); font-weight: 700; }
  .store-badge { display: inline-block; line-height: 0; }
  .store-badge img { width: auto; height: 40px; }
  .coming-soon { display: inline-flex; align-items: center; min-height: 40px; padding: 0 var(--space-4); border: 1px solid var(--color-border); border-radius: 0.5rem; color: var(--color-muted); }
  .eyebrow { color: var(--color-muted); font-size: 0.7rem; font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase; }
  .lede { max-width: 42rem; color: var(--color-muted); font-size: clamp(1.1rem, 2vw, 1.3rem); }
  .content-flow { padding-block: var(--space-7) var(--space-8); }
  .content-flow > * + * { margin-top: var(--space-5); }
  .content-flow .media-placeholder { margin: var(--space-6) 0; }
  .media-placeholder__visual { display: grid; min-height: 15rem; place-items: center; padding: var(--space-5); border: 1px solid var(--color-border); background: var(--color-surface-soft); color: var(--color-muted); text-align: center; }
  .media-placeholder__visual--video { aspect-ratio: 16 / 9; min-height: 0; }
  .media-placeholder__visual span { font-size: 0.75rem; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; }
  .content-flow .product-media { margin: var(--space-6) 0; }
  .product-media :where(img, video) { display: block; width: 100%; height: auto; }
  /* Videos show the bare window: round its corners and add the same whitespace
     and shadow that process-media.mjs bakes into screenshots (64 px margin and
     0.0175 corner radius, window 16:9). macOS windows have continuous corners,
     so a circular radius has to be larger to hide the black behind them,
     including the browser's antialiasing edge. The video is clipped itself
     because Safari does not always clip video to a rounded parent. */
  .product-media__window { width: 86.1%; margin: 4.35% auto; border-radius: 1.75% / 3.11%; box-shadow: 0 0 1.5px rgb(0 0 0 / 0.16), 0 6px 22px rgb(0 0 0 / 0.32); }
  .product-media__window video { border-radius: 1.75% / 3.11%; clip-path: inset(0 round 1.75% / 3.11%); }
  /* iPad screen recordings: 4:3 and the iPad's larger screen corners. */
  .product-media__window--ipad, .product-media__window--ipad video { border-radius: 2.2% / 2.93%; }
  .product-media__window--ipad video { clip-path: inset(0 round 2.2% / 2.93%); }
  /* Videos recorded with their own background, like Tablify next to Bear. */
  .product-media__stage { overflow: hidden; border-radius: 0.75rem; }
  .product-media figcaption { margin-top: var(--space-2); color: var(--color-muted); font-size: 0.9rem; }
  .media-placeholder figcaption { margin-top: var(--space-2); color: var(--color-muted); font-size: 0.9rem; }
  .content-flow :where(ul, ol):not([class]) { padding-left: 1.25rem; }
  .content-flow :where(li + li) { margin-top: var(--space-2); }
  .content-flow blockquote { margin-inline: 0; padding: var(--space-2) 0 var(--space-2) var(--space-4); border-inline-start: 2px solid var(--color-text); background: transparent; }
  .content-flow pre { overflow-x: auto; padding: var(--space-4); border: 1px solid var(--color-border); background: var(--color-surface-soft); }
  .content-flow code { font-family: ui-monospace, "SFMono-Regular", Consolas, monospace; font-size: 0.9em; }
  .content-flow table { width: 100%; border-collapse: collapse; }
  .content-flow th, .content-flow td { padding: var(--space-3); border: 1px solid var(--color-border); text-align: left; }
  .content-flow th { background: var(--color-surface-soft); }
  .card-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 15rem), 1fr)); gap: var(--space-5); list-style: none; }
  .app-list { display: grid; gap: 0; padding: 0; border-top: 1px solid var(--color-border); list-style: none; }
  .app-card { display: flex; align-items: center; gap: var(--space-5); padding: var(--space-5) 0; border-bottom: 1px solid var(--color-border); color: var(--color-text); text-decoration: none; }
  .app-card:hover h3 { text-decoration: underline; }
  .app-card img { width: 4rem; height: 4rem; }
  .app-card p { margin-top: var(--space-1); color: var(--color-muted); }
  .app-card span { display: block; margin-top: var(--space-2); color: var(--color-muted); font-size: 0.85rem; }
  .card { height: 100%; padding: var(--space-5) 0; border-top: 1px solid var(--color-border); background: transparent; }
  .category-list { display: grid; gap: 0; padding: 0; list-style: none; }
  .category-list .card { padding: var(--space-4) 0; }
  .category-card { display: block; color: var(--color-text); text-decoration: none; }
  .category-card:hover { border-color: var(--color-accent); }
  .help-shell { display: grid; grid-template-columns: minmax(12rem, 15rem) minmax(0, 1fr); gap: clamp(var(--space-6), 6vw, var(--space-8)); padding-block: var(--space-7); }
  .help-sidebar { align-self: start; position: sticky; top: var(--space-5); padding-right: var(--space-5); border-right: 1px solid var(--color-border); }
  .sidebar-list { margin-top: var(--space-3); list-style: none; }
  .sidebar-list ul { margin-left: var(--space-3); padding-left: var(--space-2); border-left: 1px solid var(--color-border); list-style: none; }
  .sidebar-list a { display: block; padding: var(--space-2) 0; color: var(--color-muted); text-decoration: none; }
  .sidebar-list a:hover, .sidebar-list a[aria-current="page"] { color: var(--color-text); text-decoration: underline; }
  .help-content { max-width: var(--measure); padding-top: 0; }
  .breadcrumbs ol { display: flex; flex-wrap: wrap; gap: var(--space-2); padding: 0; color: var(--color-muted); font-size: 0.9rem; list-style: none; }
  .breadcrumbs li { display: flex; align-items: center; gap: var(--space-2); margin: 0; }
  .breadcrumbs li:not(:last-child)::after { content: "/"; color: var(--color-border); }
  .article-list { display: grid; gap: var(--space-4); padding: 0; list-style: none; }
  .article-list a { display: block; padding: var(--space-4) 0; border-top: 1px solid var(--color-border); background: transparent; color: var(--color-text); text-decoration: none; }
  .article-list a:hover { text-decoration: underline; }
  .article-list strong, .article-list span { display: block; }
  .article-list span { margin-top: var(--space-1); color: var(--color-muted); }
  .article-meta, .related-articles { padding-top: var(--space-5); border-top: 1px solid var(--color-border); }
  .article-meta h2, .related-articles h2 { font-size: 1.2rem; }
  .tag-list { display: flex; flex-wrap: wrap; gap: var(--space-2); padding: 0; list-style: none; }
  .tag-list li { margin: 0; padding: 0; color: var(--color-muted); font-size: 0.9rem; }
  .tag-list li:not(:last-child)::after { content: ","; }
  .article-pagination { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--space-4); padding-top: var(--space-6); border-top: 1px solid var(--color-border); }
  .help-search { padding-block: var(--space-5); border-block: 1px solid var(--color-border); }
  .help-search h2 { font-size: 1.35rem; }
  .help-search form { margin-top: var(--space-3); }
  .help-search label { display: block; font-weight: 700; }
  .help-search input { width: 100%; margin-top: var(--space-2); padding: var(--space-3) 0; border: 0; border-bottom: 1px solid var(--color-text); background: transparent; color: var(--color-text); }
  .help-search input:disabled { cursor: wait; opacity: 0.65; }
  .help-search .article-list { margin-top: var(--space-4); }
  .article-pagination a { padding: var(--space-4) 0; border-top: 1px solid var(--color-border); text-decoration: none; }
  .article-pagination span, .article-pagination strong { display: block; }
  .article-pagination span { color: var(--color-muted); font-size: 0.85rem; }
  .article-pagination .next { grid-column: 2; text-align: right; }
  .site-footer { border-top: 1px solid var(--color-border); }
  .footer-inner { display: flex; justify-content: space-between; gap: var(--space-5); padding-block: var(--space-6); }
  .footer-links { display: flex; flex-wrap: wrap; gap: var(--space-2) var(--space-4); }
  .muted { color: var(--color-muted); }
}

@layer utilities {
  @media (max-width: 44rem) {
    .help-shell { grid-template-columns: 1fr; }
    .help-sidebar { position: static; padding-right: 0; padding-bottom: var(--space-4); border-right: 0; border-bottom: 1px solid var(--color-border); }
    .footer-inner { flex-direction: column; }
    .article-pagination { grid-template-columns: 1fr; }
    .article-pagination .next { grid-column: 1; text-align: left; }
  }
  @media (max-width: 27rem) {
    .header-inner { min-height: 4rem; gap: var(--space-2); }
    .brand { gap: var(--space-2); font-size: 0.95rem; }
    .brand-icon { width: 1.5rem; height: 1.5rem; }
    .header-actions { gap: var(--space-2); }
    .container { width: min(100% - 1.25rem, var(--content-width)); }
    .page-hero { padding-block: var(--space-6); }
    .help-shell { padding-block: var(--space-5); }
    .help-search { padding-block: var(--space-4); }
    .app-hero__inner { column-gap: var(--space-3); }
    .app-card { gap: var(--space-3); }
    .app-card img { width: 3rem; height: 3rem; }
  }
  @media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    *, *::before, *::after { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; }
  }
  @media (forced-colors: active) {
    .card, .help-sidebar, .help-search, .article-list a, .article-pagination a { border-color: CanvasText; }
    :focus-visible { outline-color: Highlight; }
  }
}