/*
  Lernavio design system — single stylesheet, layered.
  See docs/redesign/design-system.md — this file implements §1–§4 exactly.
*/

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

/* ==========================================================================
   RESET
   ========================================================================== */
@layer reset {
  html { box-sizing: border-box; -webkit-text-size-adjust: 100%; }
  *, *::before, *::after { box-sizing: inherit; }

  body, h1, h2, h3, h4, p, ul, ol, figure, blockquote, dl, dd { margin: 0; }
  ul[class], ol[class] { padding: 0; list-style: none; }
  img, picture, svg { display: block; max-inline-size: 100%; }
  input, button, textarea, select { font: inherit; color: inherit; }
  a { color: inherit; }
  table { border-collapse: collapse; }
}

/* ==========================================================================
   BASE — tokens, fonts, typography, focus
   ========================================================================== */
@layer base {
  @font-face{font-family:Onest;font-style:normal;font-weight:300 800;font-display:swap;
    src:url(/assets/fonts/onest-latin.woff2) format('woff2');
    unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+2000-206F,U+2074,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD;}
  @font-face{font-family:Onest;font-style:normal;font-weight:300 800;font-display:swap;
    src:url(/assets/fonts/onest-latin-ext.woff2) format('woff2');
    unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+1E00-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF;}
  @font-face{font-family:Onest;font-style:normal;font-weight:300 800;font-display:swap;
    src:url(/assets/fonts/onest-cyrillic.woff2) format('woff2');
    unicode-range:U+0301,U+0400-045F,U+0490-0491,U+04B0-04B1,U+2116;}
  @font-face{font-family:Onest;font-style:normal;font-weight:300 800;font-display:swap;
    src:url(/assets/fonts/onest-cyrillic-ext.woff2) format('woff2');
    unicode-range:U+0460-052F,U+1C80-1C88,U+20B4,U+2DE0-2DFF,U+A640-A69F,U+FE2E-FE2F;}

  @font-face{font-family:"IBM Plex Mono";font-style:normal;font-weight:500;font-display:swap;
    src:url(/assets/fonts/ibmplexmono-latin.woff2) format('woff2');
    unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+2000-206F,U+2074,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD;}
  @font-face{font-family:"IBM Plex Mono";font-style:normal;font-weight:500;font-display:swap;
    src:url(/assets/fonts/ibmplexmono-latin-ext.woff2) format('woff2');
    unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+1E00-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF;}
  @font-face{font-family:"IBM Plex Mono";font-style:normal;font-weight:500;font-display:swap;
    src:url(/assets/fonts/ibmplexmono-cyrillic.woff2) format('woff2');
    unicode-range:U+0301,U+0400-045F,U+0490-0491,U+04B0-04B1,U+2116;}
  @font-face{font-family:"IBM Plex Mono";font-style:normal;font-weight:500;font-display:swap;
    src:url(/assets/fonts/ibmplexmono-cyrillic-ext.woff2) format('woff2');
    unicode-range:U+0460-052F,U+1C80-1C88,U+20B4,U+2DE0-2DFF,U+A640-A69F,U+FE2E-FE2F;}

  @font-face{font-family:"Onest Fallback";src:local("Segoe UI"),local("Noto Sans"),local(Arial);
    size-adjust:104%;ascent-override:96%;descent-override:24%;line-gap-override:0%;}

  :root {
    color-scheme: light;

    /* Colour */
    --c-blue-600:#1467D8; --c-blue-700:#0F52AF; --c-blue-800:#0C4290;
    --c-blue-100:#D9EFFF; --c-blue-050:#EAF2FE;
    --c-teal-500:#12B8A6; --c-teal-700:#0B7A6E; --c-teal-050:#E6F8F5;
    --c-navy-900:#0B104D;
    --c-ink-900:#0B1F4D; --c-ink-700:#45577A; --c-ink-500:#5E7191; --c-ink-300:#A8B6CC;
    --c-line:#DCE5F0; --c-line-strong:#C3D2E4;
    --c-surface-0:#FFFFFF; --c-surface-1:#F5F8FC; --c-surface-2:#EAF1F9;
    --c-amber-700:#8A5A00; --c-amber-050:#FFF6E5;
    --c-purple-600:#7C4DE8;
    --c-focus: var(--c-blue-600);
    --c-focus-dark: #7FE3D7;

    /* Type */
    --font-sans: Onest, "Onest Fallback", "Segoe UI", "Noto Sans", system-ui, Arial, sans-serif;
    --font-mono: "IBM Plex Mono", "Cascadia Mono", Consolas, "DejaVu Sans Mono", monospace;

    --t-hero: clamp(2rem,1.4rem + 2vw,3.25rem);
    --t-h1:   clamp(1.75rem,1.3rem + 1.4vw,2.5rem);
    --t-h2:   clamp(1.5rem,1.25rem + 0.8vw,2rem);
    --t-h3:   clamp(1.125rem,1.05rem + 0.3vw,1.375rem);
    --t-h4:   1.125rem;
    --t-lede: clamp(1rem,0.96rem + 0.2vw,1.125rem);
    --t-body: 1rem;
    --t-sm:   0.875rem;
    --t-xs:   0.8125rem;
    --t-label:0.75rem;

    /* Space */
    --s-1:4px; --s-2:8px; --s-3:12px; --s-4:16px; --s-5:20px; --s-6:24px;
    --s-7:32px; --s-8:40px; --s-9:48px; --s-10:64px; --s-11:80px; --s-12:96px;

    /* Containers */
    --w-page:1200px; --w-wide:1320px; --w-prose:68ch;
    --gutter:20px;

    /* Radii / shadow */
    --r-1:4px; --r-2:8px; --r-3:12px; --r-4:16px; --r-pill:999px;
    --shadow-1: 0 1px 2px rgb(11 31 77 / .06);
    --shadow-2: 0 4px 16px rgb(11 31 77 / .08);
    --shadow-3: 0 12px 32px rgb(11 31 77 / .12);

    /* Motion */
    --dur-1:120ms; --dur-2:200ms; --dur-3:320ms;
    --ease: cubic-bezier(.2,.6,.2,1);

    /* Breakpoints (for reference / container queries if ever needed) */
    --bp-sm: 640px; --bp-md: 768px; --bp-lg: 1024px; --bp-xl: 1280px;
  }

  @media (min-width: 768px)  { :root { --gutter:24px; } }
  @media (min-width: 1024px) { :root { --gutter:32px; } }

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

  body {
    font-family: var(--font-sans);
    font-size: var(--t-body);
    line-height: 1.65;
    color: var(--c-ink-900);
    background: var(--c-surface-0);
    -webkit-font-smoothing: antialiased;
  }

  h1,h2,h3,h4 { font-weight: 700; color: var(--c-ink-900); text-wrap: balance; }
  p, li, blockquote, dd { text-wrap: pretty; }

  h1 { font-size: var(--t-h1); line-height: 1.12; letter-spacing: -0.022em; }
  h2 { font-size: var(--t-h2); line-height: 1.18; letter-spacing: -0.018em; }
  h3 { font-size: var(--t-h3); line-height: 1.28; letter-spacing: -0.012em; font-weight: 600; }
  h4 { font-size: var(--t-h4); line-height: 1.35; letter-spacing: -0.008em; font-weight: 600; }

  ::selection { background: var(--c-blue-100); color: var(--c-ink-900); }

  :focus { outline: none; }
  :focus-visible {
    outline: 3px solid var(--c-focus);
    outline-offset: 2px;
    border-radius: inherit;
  }
  .section--navy :focus-visible, .footer :focus-visible {
    outline-color: var(--c-focus-dark);
  }

  @media (prefers-reduced-motion: reduce) {
    :where(*) {
      animation-duration: 1ms !important;
      animation-iteration-count: 1 !important;
      transition-duration: 1ms !important;
    }
    html { scroll-behavior: auto; }
  }
}

/* ==========================================================================
   LAYOUT
   ========================================================================== */
@layer layout {
  .container {
    inline-size: min(100% - (var(--gutter) * 2), var(--w-page));
    margin-inline: auto;
  }
  .container--wide { inline-size: min(100% - (var(--gutter) * 2), var(--w-wide)); }

  main { display: block; }

  .section { padding-block: 48px; background: var(--c-surface-0); }
  .section--tint { background: var(--c-surface-1); }
  .section--band { background: var(--c-surface-2); }
  .section--navy { background: var(--c-navy-900); color: #fff; }
  .section--navy h2, .section--navy h3 { color: #fff; }
  .section + .section {
    border-block-start: 1px solid var(--c-line);
  }
  .section--navy + .section, .section + .section--navy { border-block-start: none; }

  @media (min-width: 768px)  { .section { padding-block: 64px; } }
  @media (min-width: 1024px) { .section { padding-block: 80px; } }
  @media (min-width: 1280px) { .section { padding-block: 88px; } }

  .section-head { margin-block-end: 20px; }
  @media (min-width: 768px)  { .section-head { margin-block-end: 24px; } }
  @media (min-width: 1024px) { .section-head { margin-block-end: 32px; } }

  .grid { display: grid; gap: var(--s-5); }
  @media (min-width: 768px)  { .grid { gap: var(--s-6); } }
  @media (min-width: 1024px) { .grid { gap: var(--s-7); } }

  .grid-2 { grid-template-columns: 1fr; }
  .grid-3 { grid-template-columns: 1fr; }
  .grid-4 { grid-template-columns: 1fr; }
  @media (min-width: 768px) {
    .grid-2 { grid-template-columns: repeat(2,1fr); }
    .grid-3 { grid-template-columns: repeat(2,1fr); }
    .grid-4 { grid-template-columns: repeat(2,1fr); }
  }
  @media (min-width: 1024px) {
    .grid-3 { grid-template-columns: repeat(3,1fr); }
    .grid-4 { grid-template-columns: repeat(4,1fr); }
  }
}

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

  /* Skip link ------------------------------------------------------------ */
  .skip-link {
    position: absolute; z-index: 100;
    inset-block-start: -100px; inset-inline-start: var(--s-4);
    background: var(--c-blue-600); color: #fff;
    padding: var(--s-3) var(--s-5); border-radius: var(--r-2);
    font-weight: 600; text-decoration: none;
    transition: inset-block-start var(--dur-2) var(--ease);
  }
  .skip-link:focus { inset-block-start: var(--s-4); }

  /* Header / nav ----------------------------------------------------------- */
  .site-header {
    position: sticky; inset-block-start: 0; z-index: 50;
    background: var(--c-surface-0);
    border-block-end: 1px solid var(--c-line);
  }
  .site-header.is-scrolled { box-shadow: var(--shadow-2); }

  .site-header__row {
    display: flex; align-items: center; gap: var(--s-6);
    block-size: 72px;
  }

  .brand { display: inline-flex; align-items: center; flex-shrink: 0; }
  .brand img { block-size: 56px; inline-size: auto; filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.6)); transition: transform 0.3s ease, filter 0.3s ease;}
  .brand:hover img { transform: scale(1.08); filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.35)); }
  
  .nav { display: none; align-items: center; gap: var(--s-6); margin-inline-start: var(--s-6); }
  @media (min-width: 1024px) { .nav { display: flex; flex: 1 1 auto; } }

  .nav__link {
    position: relative;
    font-size: var(--t-sm); font-weight: 600; color: var(--c-ink-700);
    text-decoration: none; white-space: nowrap;
    padding-block: var(--s-2);
  }
  .nav__link::after {
    content: ""; position: absolute; inset-inline: 0; inset-block-end: -6px;
    block-size: 2px; background: var(--c-blue-600);
    transform: scaleX(0); transform-origin: left;
    transition: transform var(--dur-2) var(--ease);
  }
  .nav__link:hover { color: var(--c-ink-900); }
  .nav__link:hover::after { transform: scaleX(1); }
  .nav__link[aria-current="page"] { color: var(--c-ink-900); }
  .nav__link[aria-current="page"]::after { transform: scaleX(1); }

  .site-header__actions {
    display: none; align-items: center; gap: var(--s-3); margin-inline-start: auto;
  }
  @media (min-width: 1024px) { .site-header__actions { display: flex; } }

  /* Language switcher ------------------------------------------------------ */
  .lang { position: relative; display: none; }
  @media (min-width: 1024px) { .lang { display: inline-block; } }

  .lang__toggle {
    display: inline-flex; align-items: center; gap: 6px;
    min-block-size: 44px; padding-inline: var(--s-3);
    border: 1px solid var(--c-line-strong); border-radius: var(--r-pill);
    background: var(--c-surface-0); cursor: pointer; list-style: none;
    font: 500 var(--t-label)/1 var(--font-mono); color: var(--c-ink-700);
  }
  .lang__toggle::-webkit-details-marker { display: none; }
  .lang__toggle:hover { border-color: var(--c-blue-600); color: var(--c-ink-900); }
  .lang__code { text-transform: uppercase; }
  .icon--chevron { transition: transform var(--dur-2) var(--ease); }
  .lang[open] .icon--chevron { transform: rotate(180deg); }

  .lang__menu {
    position: absolute; inset-block-start: calc(100% + 8px); inset-inline-end: 0;
    min-inline-size: 160px; background: var(--c-surface-0);
    border: 1px solid var(--c-line); border-radius: var(--r-2);
    box-shadow: var(--shadow-2); padding: var(--s-2); z-index: 60;
  }
  .lang__menu li a {
    display: flex; align-items: center; min-block-size: 44px;
    padding-inline: var(--s-3); border-radius: var(--r-1);
    text-decoration: none; color: var(--c-ink-700); font-size: var(--t-sm);
  }
  .lang__menu li a:hover { background: var(--c-surface-1); color: var(--c-ink-900); }
  .lang__menu li a[aria-current="true"] { color: var(--c-blue-600); font-weight: 600; }

  .lang-row { display: grid; grid-template-columns: repeat(2,1fr); gap: var(--s-2); }
  .lang-row a {
    display: flex; align-items: center; justify-content: center;
    min-block-size: 44px; border: 1px solid var(--c-line-strong); border-radius: var(--r-2);
    text-decoration: none; color: var(--c-ink-700); font-size: var(--t-sm); font-weight: 600;
  }
  .lang-row a[aria-current="true"] { background: var(--c-blue-050); color: var(--c-blue-600); border-color: var(--c-blue-600); }

  /* Mobile drawer ----------------------------------------------------------- */
  .drawer { position: relative; margin-inline-start: auto; }
  @media (min-width: 1024px) { .drawer { display: none; } }

  .drawer__toggle {
    display: inline-flex; align-items: center; justify-content: center;
    inline-size: 44px; block-size: 44px; cursor: pointer; list-style: none;
    border-radius: var(--r-2); color: var(--c-ink-900);
  }
  .drawer__toggle::-webkit-details-marker { display: none; }
  .drawer__toggle:hover { background: var(--c-surface-1); }
  .drawer__icon--close { display: none; }
  .drawer[open] .drawer__icon--menu { display: none; }
  .drawer[open] .drawer__icon--close { display: block; }

  .drawer__panel {
    position: fixed; inset-block-start: 72px; inset-inline: 0;
    block-size: calc(100dvh - 72px); overflow: auto;
    background: var(--c-surface-0); box-shadow: var(--shadow-2);
    padding: var(--s-6) var(--gutter); z-index: 55;
  }
  .drawer__nav { display: flex; flex-direction: column; margin-block: var(--s-5); }
  .drawer__nav a {
    display: flex; align-items: center; min-block-size: 56px;
    font-size: var(--t-lede); font-weight: 600; color: var(--c-ink-900);
    text-decoration: none; border-block-end: 1px solid var(--c-line);
  }
  .drawer__actions { display: flex; flex-direction: column; gap: var(--s-3); margin-block: var(--s-5); }
  .drawer__actions .btn { inline-size: 100%; width: auto; }
  .drawer__legal {
    display: flex; flex-direction: column; gap: var(--s-2);
    padding-block-start: var(--s-5);
    padding-block-end: calc(var(--s-8) + env(safe-area-inset-bottom));
    border-block-start: 1px solid var(--c-line);
  }
  .drawer__legal a { min-block-size: 44px; display: flex; align-items: center; color: var(--c-ink-700); font-size: var(--t-sm); text-decoration: none; }

  /* Buttons ------------------------------------------------------------- */
  .btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 8px;
    min-block-size: 44px; padding: 12px 20px; border-radius: var(--r-2);
    font-weight: 600; font-size: var(--t-sm); line-height: 1;
    text-decoration: none; border: 1px solid transparent; cursor: pointer;
    transition: color var(--dur-2) var(--ease), background-color var(--dur-2) var(--ease), border-color var(--dur-2) var(--ease);
  }
  .btn--primary { background: var(--c-blue-600); color: #fff; }
  .btn--primary:hover:not(:disabled) { background: var(--c-blue-700); }
  .btn--primary:active:not(:disabled) { background: var(--c-blue-800); }

  .btn--secondary { background: var(--c-surface-0); border-color: var(--c-line-strong); color: var(--c-ink-900); }
  .btn--secondary:hover:not(:disabled) { background: var(--c-blue-050); border-color: var(--c-blue-600); }
  .btn--secondary:active:not(:disabled) { background: var(--c-blue-100); }

  .btn--quiet { background: transparent; color: var(--c-ink-700); }
  .btn--quiet:hover:not(:disabled) { background: var(--c-surface-2); }
  .btn--quiet:active:not(:disabled) { background: var(--c-line); }

  .btn--on-dark { background: var(--c-surface-0); color: var(--c-navy-900); }
  .btn--on-dark:hover:not(:disabled) { background: #EAF2FE; }
  .btn--on-dark:active:not(:disabled) { background: var(--c-blue-100); }

  .btn:disabled { background: var(--c-ink-300); color: var(--c-ink-500); cursor: not-allowed; }
  .btn__icon { inline-size: 16px; block-size: 16px; flex-shrink: 0; }

  /* Links ----------------------------------------------------------------- */
  .prose a { color: var(--c-blue-600); text-decoration: underline; text-underline-offset: .18em; text-decoration-thickness: 1px; }
  .prose a:hover { text-decoration-thickness: 2px; color: var(--c-blue-700); }

  .link-arrow {
    display: inline-flex; align-items: center; gap: 6px;
    color: var(--c-blue-600); font-weight: 600; font-size: var(--t-sm);
    text-decoration: none;
  }
  .link-arrow span { text-decoration: underline; text-decoration-color: transparent; text-underline-offset: .18em; transition: text-decoration-color var(--dur-2) var(--ease); }
  .link-arrow:hover span { text-decoration-color: currentColor; }
  .link-arrow svg { inline-size: 16px; block-size: 16px; transition: transform var(--dur-1) var(--ease); }
  @media (prefers-reduced-motion: no-preference) {
    .link-arrow:hover svg { transform: translateX(2px); }
  }

  .section--navy a:not(.btn), .footer a:not(.btn) { color: #fff; }
  .footer a:not(.btn) { color: #C9D6EA; text-decoration: none; }
  .footer a:not(.btn):hover { color: #fff; text-decoration: underline; }

  /* Rule-label (Device A) -------------------------------------------------- */
  .rule-label {
    display: flex; align-items: center; gap: var(--s-3);
    font: 500 var(--t-label)/1 var(--font-mono); letter-spacing: .08em;
    text-transform: uppercase; color: var(--c-ink-500); margin-block-end: var(--s-4);
  }
  .rule-label::after { content: ""; flex: 1 1 auto; block-size: 1px; background: var(--c-line); }
  .section--navy .rule-label { color: #8FA3C4; }
  .section--navy .rule-label::after { background: rgb(255 255 255 / .15); }

  .section-lede { font-size: var(--t-lede); color: var(--c-ink-700); max-inline-size: 46ch; }
  .section--navy .section-lede { color: #C9D6EA; }

  /* Cards ------------------------------------------------------------------ */
  .card {
    display: flex; flex-direction: column; gap: var(--s-3);
    border: 1px solid var(--c-line); border-radius: var(--r-3);
    background: var(--c-surface-0); padding: var(--s-6);
  }
  .card__icon { inline-size: 24px; block-size: 24px; color: var(--c-blue-600); }
  .card__title { font-size: var(--t-h3); }
  .card__text { font-size: var(--t-sm); color: var(--c-ink-700); max-inline-size: 36ch; }
  .card__link { margin-block-start: auto; }

  .card--link { position: relative; text-decoration: none; transition: border-color var(--dur-2) var(--ease), background-color var(--dur-2) var(--ease), box-shadow var(--dur-2) var(--ease); }
  .card--link:hover {
    border-color: color-mix(in oklab, var(--c-blue-600) 45%, var(--c-line));
    background: var(--c-blue-050); box-shadow: var(--shadow-1);
  }
  .card--link .card__link::after { content: ""; position: absolute; inset: 0; }

  .card--flat { border: none; background: var(--c-surface-0); }

  /* Workspace video strip -------------------------------------------------- */
  .workspace-video-strip {
    display: flex; align-items: center; gap: var(--s-4);
    margin-block-start: var(--s-5); padding: var(--s-4) var(--s-5);
    border: 1px dashed var(--c-teal-500); border-radius: var(--r-3);
    background: linear-gradient(90deg, var(--c-teal-050), var(--c-blue-050));
  }
  .workspace-video-strip__icon {
    display: inline-flex; align-items: center; justify-content: center;
    flex: 0 0 32px; inline-size: 32px; block-size: 32px;
    border-radius: var(--r-pill); background: var(--c-teal-500); color: #fff;
  }
  .workspace-video-strip__text {
    margin: 0; color: var(--c-ink-900); font-size: var(--t-sm); line-height: 1.5;
  }
  .workspace-video-strip__text strong { color: var(--c-navy-900); font-weight: 650; }
  @media (min-width: 768px) {
    .workspace-video-strip { margin-block-start: var(--s-6); }
  }
  @media (min-width: 1024px) {
    .workspace-video-strip { margin-block-start: var(--s-7); }
  }

  /* Capability cards (features page hero grid) — icon plaque + richer hover ---- */
  .grid-4--capabilities .card__icon {
    inline-size: 44px; block-size: 44px; padding: 10px; box-sizing: border-box;
    background: var(--c-teal-050); border-radius: var(--r-2);
    display: inline-flex; align-items: center; justify-content: center;
    transition: background-color var(--dur-2) var(--ease), color var(--dur-2) var(--ease);
  }
  .grid-4--capabilities .card__title { color: var(--c-navy-900); }
  .grid-4--capabilities .card--link:hover { background: #F2FBF8; }
  .grid-4--capabilities .card--link:hover .card__icon { background: #14B8A6; color: #fff; }

  /* Tick list --------------------------------------------------------------- */
  .tick-list { display: flex; flex-direction: column; gap: 12px; margin-block-start: var(--s-4); }
  .tick-list li { display: flex; align-items: flex-start; gap: 12px; font-size: var(--t-body); color: var(--c-ink-700); }
  .tick-list svg { inline-size: 20px; block-size: 20px; flex-shrink: 0; color: var(--c-teal-700); margin-block-start: 2px; }
  .tick-list--2col { display: grid; grid-template-columns: 1fr; gap: 12px; }
  @media (min-width: 768px) { .tick-list--2col { grid-template-columns: repeat(2,1fr); } }

  /* Media block --------------------------------------------------------------- */
  .media-block {
    display: grid; gap: var(--s-7); align-items: center;
  }
  @media (min-width: 1024px) {
    .media-block { grid-template-columns: 7fr 5fr; }
    .media-block--reverse { grid-template-columns: 5fr 7fr; }
    .media-block--reverse .media-block__body { order: 2; }
    .media-block--reverse .shot { order: 1; }
  }
  .media-block__body h2, .media-block__body h3 { margin-block-end: var(--s-3); }

  /* Manifest ------------------------------------------------------------------ */
  .manifest { display: flex; flex-wrap: wrap; margin-top: 12px; gap: 8px; }
  .manifest__item {
    border-radius: var(--r-pill); border: 1px solid var(--c-line); background: var(--c-surface-0);
    padding: 6px 12px; font-size: var(--t-sm); color: var(--c-ink-700);
  }
  .manifest--capped { max-block-size: calc((16px + 12px) * 3 + 24px); overflow: hidden; }
  .manifest-more[open] .manifest--capped { max-block-size: none; overflow: visible; }
  .manifest-more summary { list-style: none; cursor: pointer; color: var(--c-blue-600); font-weight: 600; font-size: var(--t-sm); margin-block-start: var(--s-3); min-block-size: 44px; display: inline-flex; align-items: center; }
  .manifest-more summary::-webkit-details-marker { display: none; }
  .manifest-more[open] summary { display: none; }

  /* Shot / screenshot frame ---------------------------------------------------- */
  .shot {
    border: 1px solid var(--c-line-strong); border-radius: var(--r-3);
    overflow: hidden; box-shadow: var(--shadow-3); background: var(--c-surface-0);
  }
  .shot__chrome {
    display: flex; align-items: center; gap: var(--s-2);
    block-size: 32px; padding-inline: var(--s-4); background: var(--c-surface-2);
    border-block-end: 1px solid var(--c-line);
  }
  .shot__dots { display: inline-flex; gap: 6px; }
  .shot__dots::before, .shot__dots::after, .shot__dots span { content: ""; inline-size: 8px; block-size: 8px; border-radius: 50%; background: var(--c-ink-300); }
  .shot__path { font: 500 11px/1 var(--font-mono); color: var(--c-ink-500); margin-inline-start: var(--s-3); }
  .shot img { inline-size: 100%; block-size: auto; display: block; }
  .shot figcaption { font: 500 12px/1.4 var(--font-mono); color: var(--c-ink-500); margin-block-start: 12px; margin-block-end: 6px; margin-left: 10px; }

  /* Keep mech/live screenshots at 40%.
    live-h must remain inline-start-aligned because board-tools-demo.js
    uses the free space to the right for its overlay drawing. */
  section[aria-labelledby="mech-h"] .shot img {
    inline-size: 100%;
    min-inline-size: 160px;
  }
  section[aria-labelledby="live-h"] .shot img {
    inline-size: 40%;
    min-inline-size: 160px;
  }

  /* Board-tools demo — decorative, scroll-triggered pointer/drawing loop scoped to
     section[data-demo="board-tools"] (see assets/js/board-tools-demo.js). Purely
     visual: aria-hidden, pointer-events:none, never in the tab order. Geometry is
     computed in JS from getBoundingClientRect(); this block only styles the layers. */
  .shot--live-demo { position: relative; }

  .board-tools-demo {
    position: absolute;
    left: 0;
    right: 0;
    overflow: hidden;
    pointer-events: none;
    z-index: 3;
  }
  .board-tools-demo__svg { position: absolute; inset: 0; inline-size: 100%; block-size: 100%; }
  /* The path itself is never painted — it only supplies getPointAtLength() geometry
     for the pointer trajectory. The visible effect is the canvas glow trail below. */
  .board-tools-demo__path { fill: none; stroke: none; }

  .board-tools-demo__trail {
    position: absolute;
    inset: 0;
    inline-size: 100%;
    block-size: 100%;
  }

  .board-tools-demo__pointer-hit {
    position: absolute;
    border-radius: var(--r-2);
    background: rgb(20 103 216 / .12);
    box-shadow: 0 0 0 2px rgb(20 103 216 / .35) inset;
    opacity: 0;
    transition: opacity .15s ease;
  }
  .board-tools-demo__pointer-hit.is-active { opacity: 1; }

  .board-tools-demo__cursor {
    position: absolute;
    inset-block-start: 0;
    inset-inline-start: 0;
    opacity: 0;
    transition: opacity .3s var(--ease);
    filter: drop-shadow(0 1px 2px rgb(11 31 77 / .35));
  }
  .board-tools-demo__cursor.is-visible { opacity: 1; }
  .board-tools-demo__cursor-icon {
    display: block;
    inline-size: 100%;
    block-size: 100%;
    transition: transform .09s var(--ease);
  }
  .board-tools-demo__cursor-icon.is-clicking { transform: scale(.82); }
  .board-tools-demo__cursor svg { display: block; inline-size: 100%; block-size: 100%; }

  @media (prefers-reduced-motion: reduce) {
    /* Belt-and-braces: the JS never starts the loop under reduced motion, but if the
       overlay markup is ever present without JS having run, keep it fully inert. */
    .board-tools-demo { display: none; }
  }

  /* Snapshot diptych — a .shot variant: one frame, two panes, one seam ---------- */
  .shot--diptych { display: grid; grid-template-columns: 1fr; }
  @media (min-width: 1024px) { .shot--diptych { grid-template-columns: 1fr 1fr; } }

  .pane { position: relative; min-inline-size: 0; }
  .pane + .pane { border-block-start: 1px solid var(--c-line-strong); }
  @media (min-width: 1024px) {
    .pane + .pane { border-block-start: 0; border-inline-start: 1px solid var(--c-line-strong); }
  }

  .pane img { inline-size: 100%; block-size: 180px; object-fit: cover; display: block; }
  @media (min-width: 768px)  { .pane img { block-size: 300px; } }
  @media (min-width: 1280px) { .pane img { block-size: 340px; } }
  .pane--live  img { object-position: left top; }   /* keeps element rail + tab strip */
  .pane--saved img { object-position: 50% 100%; }   /* keeps the check-answers action */

  .pane figcaption {
    display: flex; align-items: center; gap: var(--s-3);
    min-block-size: 44px; padding: 10px var(--s-4);
    margin-block-start: 0;                       /* resets .shot figcaption */
    background: var(--c-surface-0);
    border-block-start: 1px solid var(--c-line);
  }
  .pane__tag {
    flex-shrink: 0; border-radius: var(--r-pill); padding: 5px 12px;
    font: 500 var(--t-label)/1 var(--font-mono);
    letter-spacing: .08em; text-transform: uppercase;
  }
  .pane--live  .pane__tag { background: var(--c-blue-050); color: var(--c-blue-700); }
  .pane--saved .pane__tag { background: var(--c-teal-050); color: var(--c-teal-700); }
  .pane__path {
    margin-inline-start: auto; flex-shrink: 1; min-inline-size: 0;
    overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
    font: 500 11px/1 var(--font-mono); color: var(--c-ink-500);
  }
  @media (max-width: 767px) { .pane__path { display: none; } }

  @media (forced-colors: active) { .pane__tag { border: 1px solid CanvasText; } }

  /* Waypoint rail (Device B) --------------------------------------------------- */
  .waypoints { position: relative; display: flex; flex-direction: column; gap: var(--s-7); padding-inline-start: 28px; }
  .waypoints::before {
    content: ""; position: absolute; inset-inline-start: 3px; inset-block: 4px;
    inline-size: 2px;
    background: linear-gradient(180deg, var(--c-blue-600), var(--c-teal-500));
  }
  .waypoint { position: relative; }
  .waypoint::before {
    content: ""; position: absolute; inset-inline-start: -28px; inset-block-start: 2px;
    inline-size: 8px; block-size: 8px; background: var(--c-blue-600); transform: rotate(45deg);
  }
  .waypoint:last-child::before { background: var(--c-teal-500); }
  .waypoint h3 { margin-block-end: 4px; }
  .waypoint p { color: var(--c-ink-700); font-size: var(--t-sm); max-inline-size: 46ch; }

  @media (min-width: 1024px) {
    .waypoints--horizontal { flex-direction: row; padding-inline-start: 0; padding-block-start: 28px; }
    .waypoints--horizontal::before { inset-inline: 4px; inset-block-start: 3px; inline-size: auto; block-size: 2px; background: linear-gradient(90deg, var(--c-blue-600), var(--c-teal-500)); }
    .waypoints--horizontal .waypoint { flex: 1; }
    .waypoints--horizontal .waypoint::before { inset-inline-start: 0; inset-block-start: -28px; }
  }

  /* Pricing — plan cards -------------------------------------------------------- */
  .plans { display: grid; gap: var(--s-5); grid-template-columns: 1fr; }
  @media (min-width: 640px) and (max-width: 1023px) {
    .plans { grid-auto-flow: column; grid-auto-columns: minmax(280px, 1fr); overflow-x: auto; scroll-snap-type: x mandatory; padding-block-end: var(--s-3); }
    .plans .plan { scroll-snap-align: start; }
  }
  @media (min-width: 1024px) { .plans { grid-template-columns: repeat(5, 1fr); } }

  .plan {
    display: flex; flex-direction: column; gap: var(--s-3);
    border: 1px solid var(--c-line); border-radius: var(--r-3);
    background: var(--c-surface-0); padding: var(--s-6); position: relative;
  }
  .plan--featured { border: 2px solid var(--c-blue-600); }
  .plan__pill {
    position: absolute; inset-block-start: -12px; inset-inline-start: var(--s-5);
    background: var(--c-blue-600); color: #fff; font: 600 var(--t-xs)/1 var(--font-sans);
    padding: 4px 10px; border-radius: var(--r-pill);
  }

  /* Featured plan — navy variant (homepage pricing teaser only) ------------------
     #C9D6EA and #8FA3C4 are the stylesheet's existing on-navy pair, already used at
     .section--navy .section-lede and .section--navy .rule-label. No new colour values. */
  .plan--navy { background: var(--c-navy-900); border-color: var(--c-navy-900); color: #fff; }
  .plan--navy .plan__name    { color: #fff; }
  .plan--navy .plan__amount,
  .plan--navy .plan__currency { color: #fff; }
  .plan--navy .plan__period  { color: #C9D6EA; }
  .plan--navy .plan__code    { color: #8FA3C4; }
  .plan--navy :focus-visible { outline-color: var(--c-focus-dark); }

  .plan__pill--featured {
    position: static; inset: auto; align-self: flex-start;
    background: var(--c-teal-500); color: var(--c-navy-900);
    font: 500 var(--t-label)/1 var(--font-mono);
    letter-spacing: .08em; text-transform: uppercase;
    padding: 5px 12px; border-radius: var(--r-pill);
  }

  @media (min-width: 1024px) {
    .plan--navy { margin-block: -24px; padding-block: calc(var(--s-6) + 24px); }
  }

  @media (forced-colors: active) { .plan__pill--featured { border: 1px solid CanvasText; } }

  .plan__name { font-size: var(--t-h3); }
  .plan__code { font: 500 var(--t-xs)/1 var(--font-mono); color: var(--c-ink-500); }
  .plan__badge {
    display: inline-flex; align-self: flex-start; font: 600 var(--t-xs)/1 var(--font-sans);
    padding: 4px 10px; border-radius: var(--r-pill);
  }
  .plan__badge--scheduled { background: var(--c-amber-050); color: var(--c-amber-700); }
  .plan__price { display: flex; align-items: baseline; gap: 4px; font-variant-numeric: tabular-nums; }
  .plan__amount { font-size: var(--t-h1); font-weight: 700; color: var(--c-ink-900); }
  .plan__currency { font-size: var(--t-h3); color: var(--c-ink-900); }
  .plan__period, .plan__price-word { font-size: var(--t-sm); color: var(--c-ink-500); }
  .plan--scheduled .plan__amount, .plan--scheduled .plan__currency { color: var(--c-ink-500); }
  .plan__for { font-size: var(--t-sm); color: var(--c-ink-700); min-block-size: 40px; }
  .plan__highlights { display: flex; flex-direction: column; gap: 8px; flex: 1; }
  .plan__highlights li { display: flex; align-items: flex-start; gap: 8px; font-size: var(--t-sm); color: var(--c-ink-700); }
  .plan__highlights svg { inline-size: 16px; block-size: 16px; flex-shrink: 0; margin-block-start: 2px; color: var(--c-teal-700); }
  .plan__highlights li.is-unavailable { color: var(--c-ink-500); }
  .plan__highlights li.is-unavailable svg { color: var(--c-ink-300); }
  .plan__highlights .ui-unavailable-suffix { color: var(--c-ink-300); }
  .plan__cta { inline-size: 100%; margin-block-start: auto; }

  /* Plan notes — secondary footnote block under the plan grid, never a 6th card.
     Visual spec: design-reference/pricing-important-notes.png (white card, thin
     line border, circled "i" + purple heading, plain purple digits, compact). */
  .plan-notes {
    border: 1px solid var(--c-line); border-radius: var(--r-3);
    background: var(--c-surface-0); padding: var(--s-4) var(--s-5);
    margin-block-start: var(--s-6);
  }
  .plan-notes__h {
    display: flex; align-items: center; gap: var(--s-2);
    font: 700 var(--t-sm)/1.3 var(--font-sans); color: var(--c-purple-600);
    margin-block-end: var(--s-3);
  }
  .plan-notes__h-icon { flex-shrink: 0; inline-size: 18px; block-size: 18px; color: var(--c-ink-700); }
  .plan-notes__list { display: flex; flex-direction: column; gap: var(--s-2); list-style: none; padding: 0; margin: 0; counter-reset: plan-note; }
  .plan-notes__list li { display: flex; gap: var(--s-2); font-size: var(--t-xs); line-height: 1.55; color: var(--c-ink-700); counter-increment: plan-note; }
  .plan-notes__text { min-inline-size: 0; }
  .plan-notes__list li::before {
    content: counter(plan-note); flex-shrink: 0;
    color: var(--c-purple-600); font: 700 var(--t-xs)/1.55 var(--font-sans);
  }
  .plan-notes__list strong { color: var(--c-ink-900); font-weight: 700; }

  /* Inline footnote markers on the BASIC card, pointing down at .plan-notes — placement
     per design-reference/basic-notes.png (next to the trial price and the unavailable
     marketplace-payment line); styled like the plain purple digits in the notes list. */
  .plan-notes__ref { color: var(--c-purple-600); font-weight: 700; font-size: 0.75em; margin-inline-start: 2px; }

  /* Enterprise CTA — wide standalone band, deliberately not a sixth plan card ---- */
  .enterprise-cta {
    display: flex; flex-direction: column; gap: var(--s-5);
    border: 1px solid var(--c-line-strong); border-radius: var(--r-3);
    background: var(--c-surface-0); padding: var(--s-6);
  }
  .enterprise-cta__points { display: flex; flex-wrap: wrap; gap: var(--s-3) var(--s-5); margin-block-start: var(--s-3); padding: 0; list-style: none; }
  .enterprise-cta__points li { display: flex; align-items: center; gap: 8px; font-size: var(--t-sm); color: var(--c-ink-700); }
  .enterprise-cta__points svg { inline-size: 16px; block-size: 16px; flex-shrink: 0; color: var(--c-teal-700); }
  .enterprise-cta__cta { align-self: flex-start; flex-shrink: 0; }
  @media (min-width: 1024px) {
    .enterprise-cta { flex-direction: row; align-items: center; justify-content: space-between; gap: var(--s-6); }
  }

  /* Pricing — comparison table -------------------------------------------------- */
  .table-scroll { overflow-x: auto; border: 1px solid var(--c-line); border-radius: var(--r-3); }
  .cmp { inline-size: 100%; min-inline-size: 720px; border-collapse: collapse; font-variant-numeric: tabular-nums; }
  .cmp caption { position: absolute; inline-size: 1px; block-size: 1px; overflow: hidden; clip: rect(0 0 0 0); }
  .cmp th, .cmp td { padding: 12px 16px; text-align: start; border-block-end: 1px solid var(--c-line); font-size: var(--t-sm); }
  .cmp thead th { position: sticky; inset-block-start: 72px; background: var(--c-surface-0); font: 600 var(--t-sm)/1.3 var(--font-sans); border-block-end: 1px solid var(--c-line-strong); z-index: 2; }
  .cmp__plan { display: block; }
  .cmp__code { display: block; font: 500 11px/1 var(--font-mono); color: var(--c-ink-500); margin-block-start: 2px; }
  .cmp__grouphead th { background: var(--c-surface-1); font: 600 var(--t-xs)/1 var(--font-mono); text-transform: uppercase; letter-spacing: .06em; color: var(--c-ink-500); }
  .cmp tbody th[scope="row"] { font-weight: 600; color: var(--c-ink-900); position: sticky; inset-inline-start: 0; background: var(--c-surface-0); border-inline-end: 1px solid var(--c-line); }
  .cmp__key { display: block; font: 500 11px/1 var(--font-mono); color: var(--c-ink-500); margin-block-start: 2px; font-weight: 400; }
  .cmp .tick { inline-size: 18px; block-size: 18px; color: var(--c-teal-700); }
  .cmp .dash { color: var(--c-ink-500); }

  .plan-cards-mobile { display: flex; flex-direction: column; gap: var(--s-5); }
  .plan-cards-mobile dl { display: grid; grid-template-columns: 1fr auto; gap: 8px 12px; margin-block-start: var(--s-4); border-block-start: 1px solid var(--c-line); padding-block-start: var(--s-4); }
  .plan-cards-mobile dt { color: var(--c-ink-700); font-size: var(--t-sm); }
  .plan-cards-mobile dd { color: var(--c-ink-900); font-size: var(--t-sm); font-weight: 600; text-align: end; }

  @media (min-width: 640px) { .plan-cards-mobile { display: none; } }
  @media (max-width: 639px) { .table-scroll { display: none; } }

  /* Pricing — add-ons ------------------------------------------------------------
     Grouped add-on cards replacing the old SKU table. Purely presentational: real
     compatibility/billing logic stays in the product; this is marketing content. */
  .addon-lede { max-inline-size: var(--w-prose); }
  .addon-legend { display: flex; flex-wrap: wrap; gap: var(--s-2) var(--s-6); margin-block: var(--s-5) var(--s-7); font-size: var(--t-xs); color: var(--c-ink-500); }
  .addon-legend li { display: flex; align-items: center; gap: 6px; }
  .addon-legend__dot { inline-size: 8px; block-size: 8px; border-radius: 50%; flex-shrink: 0; background: var(--c-ink-300); }
  .addon-legend__dot--monthly { background: var(--c-teal-500); }
  .addon-legend__dot--once { background: var(--c-blue-600); }
  .addon-legend__dot--credit { background: var(--c-amber-700); }
  .addon-legend__dot--custom { background: var(--c-navy-900); }

  .addon-groups { display: flex; flex-direction: column; gap: var(--s-9); }
  .addon-group__head { display: flex; align-items: flex-start; gap: var(--s-4); margin-block-end: var(--s-5); }
  .addon-group__icon {
    display: flex; align-items: center; justify-content: center; flex-shrink: 0;
    inline-size: 40px; block-size: 40px; border-radius: var(--r-2);
    background: var(--c-teal-050); color: var(--c-teal-700);
  }
  .addon-group__icon svg { inline-size: 20px; block-size: 20px; }
  .addon-group__name { font-size: var(--t-h3); margin-block-end: 2px; }
  .addon-group__sub { font-size: var(--t-sm); color: var(--c-ink-700); }
  .addon-group__scope { font-size: var(--t-xs); color: var(--c-ink-500); margin-block-start: 2px; }

  .addon-grid { display: grid; gap: var(--s-4); grid-template-columns: 1fr; }
  @media (min-width: 640px) { .addon-grid { grid-template-columns: repeat(2,1fr); } }
  @media (min-width: 1024px) { .addon-grid { grid-template-columns: repeat(3,1fr); } }
  .addon-grid--brand { grid-template-columns: 1fr; }
  @media (min-width: 640px) { .addon-grid--brand { grid-template-columns: repeat(2,1fr); } }
  @media (min-width: 1200px) { .addon-grid--brand { grid-template-columns: repeat(3,1fr); } }

  .addon-card {
    display: flex; flex-direction: column; gap: var(--s-2);
    border: 1px solid var(--c-line); border-radius: var(--r-3);
    background: var(--c-surface-0); padding: var(--s-5); position: relative;
  }
  .addon-card__badge {
    align-self: flex-start; font: 600 var(--t-label)/1 var(--font-mono);
    letter-spacing: .06em; text-transform: uppercase;
    padding: 4px 10px; border-radius: var(--r-pill); margin-block-end: var(--s-1);
  }
  .addon-card__badge--monthly { background: var(--c-teal-050); color: var(--c-teal-700); }
  .addon-card__badge--once    { background: var(--c-blue-050); color: var(--c-blue-700); }
  .addon-card__badge--credit  { background: var(--c-amber-050); color: var(--c-amber-700); }
  .addon-card__badge--custom  { background: var(--c-surface-1); color: var(--c-ink-700); }
  .addon-card__name { font: 600 var(--t-h4)/1.3 var(--font-sans); color: var(--c-ink-900); }
  .addon-card__desc { font-size: var(--t-sm); color: var(--c-ink-700); flex: 1; }
  .addon-card__price { display: flex; align-items: baseline; gap: 6px; flex-wrap: wrap; margin-block-start: var(--s-1); font-variant-numeric: tabular-nums; }
  .addon-card__amount { font-size: var(--t-h3); font-weight: 700; color: var(--c-ink-900); }
  .addon-card__period { font-size: var(--t-xs); color: var(--c-ink-500); }
  .addon-card__scope { font-size: var(--t-xs); color: var(--c-ink-500); margin-block-start: var(--s-1); }

  /* Storage is a single configurable add-on (one package, several selectable sizes), not a peer
     card among the fixed-price add-ons — it spans the full add-ons grid row instead of sitting in
     one of the three columns. See tasks/done/task_pricing_storage_addon_full_width.md. */
  .addon-card--storage { grid-column: 1 / -1; gap: var(--s-4); }
  .storage-picker__input { position: absolute; opacity: 0; pointer-events: none; }
  .storage-card__body { display: flex; flex-direction: column; gap: var(--s-4); }
  .storage-picker__tabs { display: flex; flex-wrap: wrap; gap: var(--s-2); }
  .storage-picker__tabs label {
    display: inline-flex; align-items: center; justify-content: center;
    min-block-size: 40px; padding-inline: var(--s-4);
    border: 1px solid var(--c-line-strong); border-radius: var(--r-pill);
    font-size: var(--t-sm); font-weight: 600; color: var(--c-ink-700); cursor: pointer;
    transition: background .15s ease, color .15s ease, border-color .15s ease;
  }
  .storage-picker__input:focus-visible ~ .storage-card__body .storage-picker__tabs label,
  .storage-picker__tabs label:hover { border-color: var(--c-blue-600); }
  .storage-picker__price { display: none; }
  .storage-picker__price .addon-card__period { align-content: center; margin-left: 4px; }
  .storage-card__price { display: flex; flex-direction: column; align-items: flex-start; gap: 4px; }
  .storage-card__price .addon-card__badge { margin-block-end: 0; }
  @media (min-width: 1024px) {
    .storage-card__body { flex-direction: row; align-items: center; justify-content: space-between; gap: var(--s-5); }
    .storage-picker__tabs { flex-wrap: nowrap; }
    .storage-card__price { align-items: flex-end; flex-shrink: 0; }
  }

  /* Wire each radio to its own tab + price pair via the general sibling combinator. The
     inputs are direct children of the card (siblings of .storage-card__body); the tabs and
     prices blocks live a couple of levels deeper inside it, so the chain has to name that
     wrapper explicitly — "~ .storage-picker__tabs" would require .storage-picker__tabs itself
     to be the sibling, which it is not. */
  #addon-storage-10:checked ~ .storage-card__body .storage-picker__tabs label[for="addon-storage-10"],
  #addon-storage-50:checked ~ .storage-card__body .storage-picker__tabs label[for="addon-storage-50"],
  #addon-storage-100:checked ~ .storage-card__body .storage-picker__tabs label[for="addon-storage-100"],
  #addon-storage-500:checked ~ .storage-card__body .storage-picker__tabs label[for="addon-storage-500"],
  #addon-storage-1tb:checked ~ .storage-card__body .storage-picker__tabs label[for="addon-storage-1tb"] {
    background: var(--c-blue-600); color: #fff; border-color: var(--c-blue-600);
  }
  #addon-storage-10:checked ~ .storage-card__body .storage-picker__prices .storage-picker__price[data-size="10"],
  #addon-storage-50:checked ~ .storage-card__body .storage-picker__prices .storage-picker__price[data-size="50"],
  #addon-storage-100:checked ~ .storage-card__body .storage-picker__prices .storage-picker__price[data-size="100"],
  #addon-storage-500:checked ~ .storage-card__body .storage-picker__prices .storage-picker__price[data-size="500"],
  #addon-storage-1tb:checked ~ .storage-card__body .storage-picker__prices .storage-picker__price[data-size="1tb"] {
    display: flex;
  }

  /* FAQ / accordion -------------------------------------------------------------- */
  .faq { display: flex; flex-direction: column; }
  .qa { border-block-end: 1px solid var(--c-line); }
  .qa__q {
    list-style: none; cursor: pointer; min-block-size: 56px;
    display: flex; align-items: center; justify-content: space-between; gap: var(--s-4);
    font-size: var(--t-h4); color: var(--c-ink-900); padding-block: var(--s-3);
    position: relative; padding-inline-end: 32px;
  }
  .qa__q::-webkit-details-marker { display: none; }
  .qa__q:hover { background: var(--c-surface-1); }
  .qa__q::before, .qa__q::after {
    content: ""; position: absolute; inset-inline-end: 4px; inset-block-start: 50%;
    background: var(--c-ink-700); transition: transform var(--dur-2) var(--ease);
  }
  .qa__q::before { inline-size: 14px; block-size: 2px; margin-block-start: -1px; }
  .qa__q::after { inline-size: 2px; block-size: 14px; margin-inline-start: 6px; margin-block-start: -7px; margin-right: 6px; }
  .qa[open] .qa__q::after { transform: scaleY(0); }
  .qa__a { padding-block-end: var(--s-5); }
  .qa__a p { max-inline-size: 68ch; color: var(--c-ink-700); }

  /* Tables (general prose) -------------------------------------------------------- */
  .table-scroll table:not(.cmp) { inline-size: 100%; }
  table:not(.cmp) th { font: 600 var(--t-label)/1 var(--font-mono); text-transform: uppercase; color: var(--c-ink-500); text-align: start; border-block-end: 1px solid var(--c-line-strong); padding: 12px 16px; }
  table:not(.cmp) td { font-size: var(--t-sm); border-block-end: 1px solid var(--c-line); padding: 12px 16px; }

  /* Forms ---------------------------------------------------------------------------- */
  .field { display: flex; flex-direction: column; gap: 6px; margin-block-end: var(--s-5); }
  .field label { font-size: var(--t-sm); font-weight: 600; color: var(--c-ink-900); }
  .field input, .field textarea {
    min-block-size: 44px; padding: 10px 14px; border: 1px solid var(--c-line-strong);
    border-radius: var(--r-2); background: var(--c-surface-0); font-size: var(--t-body);
  }
  .field input:focus, .field textarea:focus { border-color: var(--c-blue-600); }
  .field input:user-invalid, .field textarea:user-invalid { border-color: var(--c-amber-700); }
  .field__error { font-size: var(--t-sm); color: var(--c-amber-700); }

  /* Notice / status block -------------------------------------------------------------- */
  .notice {
    border-inline-start: 3px solid var(--c-amber-700); background: var(--c-amber-050);
    border-radius: 0 var(--r-2) var(--r-2) 0; padding: var(--s-5) var(--s-6);
  }
  .notice--info { border-inline-start-color: var(--c-blue-600); background: var(--c-blue-050); }
  .notice__label { font: 500 var(--t-label)/1 var(--font-mono); text-transform: uppercase; color: var(--c-amber-700); margin-block-end: 6px; }
  .notice--info .notice__label { color: var(--c-blue-700); }
  .notice__text { color: var(--c-ink-900); font-size: var(--t-sm); }
  .notice__text + .notice__text { margin-block-start: var(--s-3); }
  .notice__list {
    display: flex; flex-direction: column; gap: var(--s-3);
    padding-inline-start: 20px; color: var(--c-ink-900); font-size: var(--t-sm);
  }

  /* CTA band ------------------------------------------------------------------------- */
  .cta-band { display: flex; flex-direction: column; gap: var(--s-6); }
  @media (min-width: 1024px) {
    .cta-band { flex-direction: row; align-items: center; justify-content: space-between; }
  }
  .cta-band__actions { display: flex; flex-wrap: wrap; gap: var(--s-3); }

  /* Footer --------------------------------------------------------------------------- */
  .footer { background: var(--c-navy-900); color: #C9D6EA; }
  .footer__top { padding-block: var(--s-9); display: grid; gap: var(--s-7); grid-template-columns: 1fr; }
  @media (min-width: 768px)  { .footer__top { grid-template-columns: repeat(2, 1fr); } }
  @media (min-width: 1024px) { .footer__top { grid-template-columns: 1.4fr repeat(4, 1fr); } }
  .footer__brand img { block-size: 56px; inline-size: auto; margin-block-end: var(--s-3); }
  .footer__descriptor { font-size: var(--t-sm); max-inline-size: 28ch; }
  .footer__col-h { font: 600 var(--t-label)/1 var(--font-mono); text-transform: uppercase; color: #8FA3C4; margin-block-end: var(--s-3); display: block; }
  .footer__col ul { display: flex; flex-direction: column; gap: var(--s-2); }
  .footer__col a { min-block-size: 44px; display: flex; align-items: center; font-size: var(--t-sm); }
  .footer__lang { padding-block: var(--s-6); border-block-start: 1px solid rgb(255 255 255 / .12); }
  .footer__bottom {
    padding-block: var(--s-5); border-block-start: 1px solid rgb(255 255 255 / .12);
    display: flex; flex-wrap: wrap; gap: var(--s-3); justify-content: space-between; font-size: var(--t-xs); color: #8FA3C4;
  }
  .footer__legal { display: inline-flex; align-items: center; flex-wrap: wrap; gap: var(--s-2); }
  .footer__legal-sep { color: #8FA3C4; }
  .footer__consent-link {
    background: none; border: 0; padding: 0; margin: 0; font: inherit; color: #8FA3C4; cursor: pointer;
  }
  .footer__consent-link:hover, .footer__consent-link:focus-visible { color: #fff; text-decoration: underline; }
  @media (max-width: 479px) {
    .footer__legal { flex-direction: column; align-items: flex-start; gap: var(--s-1); }
    .footer__legal-sep { display: none; }
  }

  /* Legal shell ------------------------------------------------------------------------ */
  .legal__grid { display: grid; gap: var(--s-7); grid-template-columns: 1fr; padding-block: var(--s-9); }
  @media (min-width: 1024px) { .legal__grid { grid-template-columns: 220px 1fr; } }
  .legal__head { grid-column: 1 / -1; margin-block-end: var(--s-4); }
  .legal__meta { color: var(--c-ink-500); font-size: var(--t-sm); }
  /* Desktop TOC: plain sticky nav, hidden below 1024 (details would need JS to force
     open on Chromium's ::details-content model, so mobile and desktop are two markup
     instances toggled with plain display, per design-system §3.17). */
  .legal__toc { order: -1; display: none; }
  @media (min-width: 1024px) {
    .legal__toc { display: block; position: sticky; inset-block-start: 96px; align-self: start; order: 0; }
    .legal__toc-mobile { display: none; }
  }
  .legal__toc ol, .legal__toc-mobile ol { display: flex; flex-direction: column; gap: 8px; }
  .legal__toc a, .legal__toc-mobile a { color: var(--c-ink-700); text-decoration: none; font-size: var(--t-sm); }
  .legal__toc a:hover, .legal__toc-mobile a:hover { color: var(--c-blue-600); }
  .legal__toc-mobile { order: -1; margin-block-end: var(--s-2); }
  .legal__toc-mobile summary { cursor: pointer; font-weight: 600; min-block-size: 44px; display: flex; align-items: center; list-style: none; }
  .legal__toc-mobile summary::-webkit-details-marker { display: none; }
  .legal__toc-mobile nav { padding-block-start: var(--s-3); }

  .prose p { color: var(--c-ink-700); line-height: 1.7; margin-block-end: var(--s-4); overflow-wrap: break-word; hyphens: auto; }
  .prose h2 { font-size: var(--t-h3); margin-block: var(--s-7) var(--s-3); }
  .prose h3 { font-size: var(--t-h4); margin-block: var(--s-5) var(--s-2); }
  .prose ul, .prose ol { padding-inline-start: 20px; display: flex; flex-direction: column; gap: 8px; margin-block-end: var(--s-4); color: var(--c-ink-700); }
  .prose strong { font-weight: 600; color: var(--c-ink-900); }

  /* Breadcrumbs ------------------------------------------------------------------------ */
  .breadcrumb ol { display: flex; flex-wrap: wrap; gap: 24px; font: 500 var(--t-label)/1 var(--font-mono); color: var(--c-ink-500); }
  .breadcrumb a { color: var(--c-ink-500); text-decoration: none; }
  .breadcrumb a:hover { color: var(--c-blue-600); }
  .breadcrumb li:not(:last-child)::after { content: "/"; margin-inline-start: 6px; color: var(--c-ink-300); }
  .breadcrumb li[aria-current="page"] { color: var(--c-ink-700); }

  /* Page hero ------------------------------------------------------------------------ */
  .page-hero { padding-block: var(--s-9) var(--s-8); max-inline-size: 60ch; }
  .page-hero .rule-label { margin-block-end: var(--s-3); }
  .page-hero p.section-lede { margin-block-start: var(--s-3); }

  /* Shared brand-purple accent span — wrap the emphasised phrase of a heading in this,
     never colour by nth-child/text search. Reused across headline components below. */
  .text-accent { color: var(--c-purple-600); }

  /* Brand slogan (tri-colour "Learn. Navigate. Grow." wordmark) — each clause gets its own
     span with an explicit modifier class, never nth-child/text-search colouring, so the
     mapping survives translations of any length. */
  .brand-slogan__part--1 { color: var(--c-navy-900); }
  .brand-slogan__part--2 { color: var(--c-blue-600); }
  .brand-slogan__part--3 { color: var(--c-teal-700); }

  /* Pricing hero headline — noticeably bigger than the lede, still smaller than the H1
     above it (h1 uses --t-h1; this uses --t-h2, which stays below --t-h1 at every viewport
     width because both are clamps with a lower start and slower vw growth). */
  .pricing-hero__headline {
    font: 700 var(--t-h2)/1.25 var(--font-sans);
    color: var(--c-ink-900);
    margin-block-start: var(--s-3);
    text-wrap: balance;
  }
  .pricing-hero__headline + .section-lede { margin-block-start: var(--s-2); }

  /* Cookie bar ------------------------------------------------------------------------ */
  .cookie-bar {
    position: fixed; inset-inline: 0; inset-block-end: 0; z-index: 90;
    background: var(--c-surface-0); border-block-start: 1px solid var(--c-line); box-shadow: var(--shadow-2);
    padding: var(--s-5) var(--gutter);
  }
  .cookie-bar__row { display: flex; flex-direction: column; gap: var(--s-4); }
  @media (min-width: 768px) {
    .cookie-bar__row { flex-direction: row; align-items: center; justify-content: space-between; }
  }
  .cookie-bar p { font-size: var(--t-sm); color: var(--c-ink-700); max-inline-size: 56ch; }
  .cookie-bar__actions { display: flex; flex-wrap: wrap; gap: var(--s-3); flex-shrink: 0; }


  .consent-dialog {
    inline-size: min(680px, calc(100% - 2 * var(--gutter))); max-block-size: calc(100dvh - 2 * var(--s-5));
    margin: auto; padding: 0; border: 1px solid var(--c-line); border-radius: var(--r-4);
    background: var(--c-surface-0); color: var(--c-ink-900); box-shadow: var(--shadow-3);
  }
  .consent-dialog::backdrop { background: rgb(10 20 40 / 55%); }
  .consent-dialog__panel { display: flex; flex-direction: column; max-block-size: inherit; }
  .consent-dialog__header {
    display: flex; align-items: flex-start; justify-content: space-between; gap: var(--s-4);
    padding: var(--s-5); border-block-end: 1px solid var(--c-line);
  }
  .consent-dialog__header h2 { font-size: var(--t-h3); }
  .consent-dialog__header p { margin-block-start: var(--s-2); color: var(--c-ink-700); }
  .consent-dialog__close {
    display: grid; place-items: center; flex: 0 0 auto; inline-size: 36px; block-size: 36px;
    border: 0; border-radius: var(--r-2); background: transparent; cursor: pointer;
    font-size: 28px; line-height: 1;
  }
  .consent-dialog__close:hover { background: var(--c-surface-1); }
  .consent-dialog__options { display: grid; gap: var(--s-3); overflow-y: auto; padding: var(--s-5); }
  .consent-option {
    display: grid; grid-template-columns: auto 1fr; gap: var(--s-3); align-items: start;
    border: 1px solid var(--c-line); border-radius: var(--r-3); padding: var(--s-4); cursor: pointer;
  }
  .consent-option:has(input:checked) { border-color: var(--c-blue-600); background: var(--c-blue-050); }
  .consent-option input { inline-size: 20px; block-size: 20px; margin-block-start: 2px; accent-color: var(--c-blue-600); }
  .consent-option span { display: grid; gap: 4px; }
  .consent-option small { color: var(--c-ink-700); font-size: var(--t-sm); }
  .consent-dialog__actions {
    display: flex; flex-wrap: wrap; justify-content: flex-end; gap: var(--s-3);
    padding: var(--s-4) var(--s-5); border-block-start: 1px solid var(--c-line);
  }
  @media (max-width: 479px) {
    .consent-dialog__actions .btn { flex: 1 1 auto; }
  }

  /* Element chips manifest heading (visually hidden) */
  .visually-hidden-heading { position: absolute; inline-size: 1px; block-size: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
}

/* ==========================================================================
   PAGES (page-specific composition rules that don't belong in components)
   ========================================================================== */
@layer pages {
  .hero { padding-block: var(--s-9) var(--s-8); }
  .hero__grid { display: grid; gap: var(--s-7); align-items: start; }
  @media (min-width: 1024px) { .hero__grid { grid-template-columns: 7fr 5fr; align-items: center; } }
  .hero__copy { max-inline-size: 34rem; }
  .hero h1 { font-size: var(--t-hero); line-height: 1.06; letter-spacing: -0.025em; max-inline-size: 17ch; }
  @media (max-width: 389px) { .hero h1 { max-inline-size: none; } }
  .hero__lede { font-size: var(--t-lede); color: var(--c-ink-700); max-inline-size: 46ch; margin-block: var(--s-4); }
  .hero__actions { display: flex; flex-wrap: wrap; gap: var(--s-3); margin-block-start: var(--s-5); }
  @media (max-width: 389px) { .hero__actions { flex-direction: column; } .hero__actions .btn { inline-size: 100%; } }

  .manifest-section { padding-block: var(--s-7) var(--s-8); }
}

/* ==========================================================================
   UTILITIES
   ========================================================================== */
@layer utilities {
  .sr-only {
    position: absolute; inline-size: 1px; block-size: 1px; padding: 0; margin: -1px;
    overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
  }
  .container-narrow { max-inline-size: var(--w-prose); }
  [hidden] { display: none !important; }

  @media (forced-colors: active) {
    .tick, .waypoint::before, .qa__q::before, .qa__q::after { forced-color-adjust: none; border: 1px solid CanvasText; }
  }
}