/* =====================================================================
   «Обсерватория» — editorial design system of the public journal.
   Night-sky bookends (header + footer), daylight paper between them,
   one loud colour (--acid), a seven-hue rubric code, typography first.
   Six tokens are themeable per edition via /theme.css:
     --paper --ink --secondary --iris --acid --heading
   Colour tokens (band, plate, on-acid, star) come only from /theme.css :root; the html[data-*]
   variant rules at the end retarget structure tokens only. Never key a colour literal on a data-attribute.
   ===================================================================== */
@font-face {
  font-family: Manrope;
  src: url("/fonts/manrope.woff2") format("woff2"), url("/fonts/manrope.ttf") format("truetype");
  font-weight: 200 800;
  font-display: swap;
}
:root {
  --paper: #f8f7f1; --ink: #252032; --secondary: #625d69; --iris: #dfd2f2; --acid: #dfef85; --heading: #725396;
  /* derived roles: hex defaults for the stock palette, re-derived below where color-mix() exists */
  --card: #fdfcf9; --rule: #dedbd6; --rule-soft: #e9e6e0; --rule-strong: #b9b4b8;
  --tint: #efe9f5; --tint-strong: #e6dcf1; --muted: #5f596a;
  --band: #252032; --band-ink: #f8f7f1; --band-muted: #b5b0c2; --band-rule: #3d3850; --star: rgb(248 247 241 / .55);
  --heading-strong: #4c3a66; --link-underline: rgb(114 83 150 / .45);
  /* fixed, never derived */
  --scrim: #0b0a14; --over-image: #fff; --over-image-muted: rgb(255 255 255 / .78); --on-acid: #13111a;
  --rubric: var(--heading);
  --band-accent: var(--acid);   /* acid on the ink band; theme.css re-derives it per band variant */
  /* role tokens: typography, article plate, section rules, grid — defaults equal the stock look */
  --display: var(--serif); --display-weight: 400; --display-track: -.025em; --display-ui: var(--sans); --display-ui-weight: 800; --body: var(--sans);
  --wordmark: var(--sans); --wordmark-weight: 800; --wordmark-em: italic 400 1em var(--serif);
  --plate: var(--band); --plate-ink: var(--band-ink); --plate-muted: var(--band-muted); --plate-rule: var(--band-rule); --plate-accent: var(--band-accent);
  --rule-head: 3px solid var(--ink); --rule-head-shadow: 0 5px 0 -4px var(--rule); --cols: 3;
  --sans: Manrope, "Segoe UI", system-ui, Arial, sans-serif;
  --serif: Charter, "Sitka Text", "Iowan Old Style", Cambria, Georgia, "Times New Roman", serif;
  --mono: ui-monospace, "Cascadia Mono", Consolas, "Liberation Mono", monospace;
  --ease: cubic-bezier(.2, .7, .2, 1);
  --gap-section: clamp(48px, 4rem + 3vw, 112px);
  --wrap: 1240px; --gutter: clamp(16px, 4vw, 48px);
  --r-xs: 4px; --r-s: 8px; --r-m: 14px; --r-l: 22px; --r-pill: 999px;
  --sh-1: 0 1px 2px rgb(8 8 18 / .06), 0 10px 28px -14px rgb(8 8 18 / .22);
  --sh-2: 0 2px 4px rgb(8 8 18 / .08), 0 28px 56px -24px rgb(8 8 18 / .38);
  --sh-hero: 0 40px 80px -40px rgb(8 8 18 / .55);
  --hero-lift: 72px;
  color-scheme: light;
}
@supports (color: color-mix(in srgb, red, blue)) {
  :root {
    --card: color-mix(in srgb, var(--paper) 88%, #fff);
    --rule: color-mix(in srgb, var(--ink) 14%, var(--paper));
    --rule-soft: color-mix(in srgb, var(--ink) 8%, var(--paper));
    --rule-strong: color-mix(in srgb, var(--ink) 34%, var(--paper));
    --tint: color-mix(in srgb, var(--iris) 42%, var(--paper));
    --tint-strong: color-mix(in srgb, var(--iris) 80%, var(--paper));
    --muted: color-mix(in srgb, var(--secondary) 78%, var(--ink));
    --band: var(--ink); --band-ink: var(--paper);
    --band-muted: color-mix(in srgb, var(--paper) 66%, var(--ink));
    --band-rule: color-mix(in srgb, var(--paper) 16%, var(--ink));
    --star: color-mix(in srgb, var(--paper) 55%, transparent);
    --heading-strong: color-mix(in srgb, var(--heading) 70%, var(--ink));
    --link-underline: color-mix(in srgb, var(--heading) 45%, transparent);
  }
}
/* seven-hue rubric code (fixed, carried by data-category / data-rubric / data-nav-rubric) */
[data-category="Космос"], [data-rubric="Космос"], [data-nav-rubric="Космос"] { --rubric: #7c83ff; }
[data-category="Физика"], [data-rubric="Физика"], [data-nav-rubric="Физика"] { --rubric: #ff8a5b; }
[data-category="Химия"], [data-rubric="Химия"], [data-nav-rubric="Химия"] { --rubric: #2fd3c6; }
[data-category="Биология"], [data-rubric="Биология"], [data-nav-rubric="Биология"] { --rubric: #5bd27a; }
[data-category="Человек"], [data-rubric="Человек"], [data-nav-rubric="Человек"] { --rubric: #ff6fa6; }
[data-category="Земля"], [data-rubric="Земля"], [data-nav-rubric="Земля"] { --rubric: #d4a72c; }
[data-category="Погода"], [data-rubric="Погода"], [data-nav-rubric="Погода"] { --rubric: #5bb8ff; }

/* ---- base ---- */
* { box-sizing: border-box; }
html { scroll-padding-top: 88px; -webkit-text-size-adjust: 100%; }
body { margin: 0; color: var(--ink); background: var(--paper); font: 430 clamp(17px, 1rem + .25vw, 19px)/1.6 var(--body); -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility; overflow-x: clip; }
h1, h2, h3, p, figure, ol, ul, dl, dd { margin: 0; }
a { color: inherit; text-decoration: none; }
button, input { font: inherit; }
img { max-width: 100%; height: auto; }
::selection { background: var(--acid); color: var(--on-acid); }
:focus-visible { outline: 2px solid var(--ink); outline-offset: 2px; box-shadow: 0 0 0 6px var(--acid); border-radius: var(--r-xs); }
.topbar :focus-visible, .j-footer :focus-visible, .j-header :focus-visible { outline-color: var(--band-ink); }
.takeaways :focus-visible, .task-strip :focus-visible, .practice-result :focus-visible { outline-color: var(--plate-ink); }
[hidden] { display: none !important; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; padding: 0; margin: -1px; clip-path: inset(50%); white-space: nowrap; }
.skip-link { position: absolute; z-index: 40; top: 4px; left: 8px; padding: 8px 15px; color: var(--on-acid); background: var(--acid); border-radius: var(--r-s); font-weight: 700; transform: translateY(-150%); }
.skip-link:focus { transform: none; }
.ym-pixel { position: absolute; left: -9999px; width: 1px; height: 1px; }
.j-wrap { width: min(var(--wrap), 100% - 2 * var(--gutter)); margin-inline: auto; }
.kicker { display: flex; align-items: center; gap: 10px; font: 750 11px/1.2 var(--sans); letter-spacing: .14em; text-transform: uppercase; color: var(--muted); }
.kicker::before { content: ""; width: 20px; height: 2px; background: var(--acid); flex: none; }
.pill { display: inline-flex; align-items: center; gap: 7px; padding: 5px 11px; border-radius: var(--r-pill); font: 750 11px/1 var(--sans); letter-spacing: .12em; text-transform: uppercase; background: var(--tint); color: var(--ink); }
@supports (color: color-mix(in srgb, red, blue)) {
  .pill { background: color-mix(in srgb, var(--rubric) 16%, var(--paper)); color: color-mix(in srgb, var(--rubric) 52%, var(--ink)); }
}
.pill::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--rubric); flex: none; }
.meta { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; color: var(--muted); font: 600 13px/1.3 var(--sans); font-variant-numeric: tabular-nums; }
.meta > time + span::before, .meta > time + time::before { content: "·"; margin-right: 12px; opacity: .7; }
.read-link, .poll-send { display: inline-flex; align-items: center; gap: 14px; min-height: 48px; padding: 0 22px; border-radius: var(--r-pill); background: var(--ink); color: var(--paper); font: 750 14px/1 var(--sans); border: 0; text-decoration: none; cursor: pointer; transition: background .16s var(--ease), transform .16s var(--ease); }
.read-link:hover, .poll-send:hover { background: var(--heading-strong); }
.read-link:active, .poll-send:active { transform: translateY(1px); }
.btn-ghost, .read-link.btn-ghost { background: transparent; color: var(--ink); border: 1px solid var(--rule-strong); }
.btn-ghost:hover, .read-link.btn-ghost:hover { border-color: var(--ink); background: var(--tint); }
.j-footer .btn-ghost, .j-footer .read-link.btn-ghost { color: var(--band-ink); border-color: var(--band-rule); }
.j-footer .btn-ghost:hover, .j-footer .read-link.btn-ghost:hover { border-color: var(--band-ink); background: transparent; }
.task-link, .strip-jump, .practice-action, .footer-cta .task-link { background: var(--acid); color: var(--on-acid); border: 0; }

/* ---- topbar (sticky) ---- */
.topbar { position: sticky; top: 0; z-index: 30; background: var(--band); color: var(--band-ink); }
.topbar .j-wrap { display: flex; align-items: center; justify-content: space-between; gap: 24px; min-height: 64px; transition: min-height .16s var(--ease); }
.topbar.is-stuck .j-wrap { min-height: 56px; }
.topbar.is-stuck { box-shadow: 0 1px 0 var(--band-rule), 0 12px 32px -16px rgb(8 8 18 / .5); }
[data-journal-reader] .topbar::after { content: ""; position: absolute; left: 0; bottom: 0; height: 2px; width: calc(var(--progress, 0) * 100%); background: var(--band-accent); transition: width .12s linear; }
.imprint { display: flex; align-items: center; gap: 10px; min-height: 44px; color: var(--band-ink); font: 750 11px/1 var(--sans); letter-spacing: .16em; text-transform: uppercase; }
.imprint svg { width: 26px; height: 26px; flex: none; }
.utility-nav { display: flex; gap: 20px; align-items: center; }
.utility-nav a { min-height: 44px; display: inline-flex; align-items: center; gap: 6px; font: 680 14px/1 var(--sans); color: var(--band-ink); white-space: nowrap; }
.catalog-link:hover { color: var(--band-accent); }
.task-link { padding: 0 18px; border-radius: var(--r-pill); min-height: 40px; }
.task-link:hover { filter: brightness(.95); }

/* ---- header band + rubric nav + masthead ---- */
.j-header, .j-footer { background: var(--band); color: var(--band-ink); position: relative; overflow: hidden;
  background-image: radial-gradient(1px 1px at 12% 28%, var(--star) 50%, transparent 51%),
    radial-gradient(1.5px 1.5px at 63% 71%, var(--star) 50%, transparent 51%),
    radial-gradient(1px 1px at 88% 18%, var(--star) 50%, transparent 51%);
  background-size: 320px 260px, 540px 420px, 410px 330px; }
.rubric-nav { display: flex; gap: 28px; overflow-x: auto; scrollbar-width: none; border-top: 1px solid var(--band-rule); padding-right: 40px;
  -webkit-mask-image: linear-gradient(90deg, #000 calc(100% - 40px), transparent);
  mask-image: linear-gradient(90deg, #000 calc(100% - 40px), transparent); }
.rubric-nav::-webkit-scrollbar { display: none; }
.rubric-nav a { position: relative; flex: none; display: inline-flex; align-items: center; min-height: 48px; color: var(--band-muted); font: 650 14px/1 var(--sans); }
.rubric-nav a::after { content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 3px; border-radius: 2px 2px 0 0; background: var(--band-accent); transform: scaleX(0); transform-origin: left; transition: transform .16s var(--ease); }
.rubric-nav a:hover, .rubric-nav a[aria-current] { color: var(--band-ink); }
.rubric-nav a[aria-current]::after { transform: scaleX(1); }
.rubric-nav a[aria-current][data-nav-rubric]::after { background: var(--rubric); }
.rubric-nav a:focus-visible { outline-offset: -3px; box-shadow: none; }
.masthead { display: grid; grid-template-columns: 1fr auto; align-items: end; gap: 12px 24px; padding: clamp(28px, 4vw, 56px) 0 calc(var(--hero-lift) + 28px); }
.masthead h1 { font: var(--wordmark-weight) clamp(44px, 2rem + 6.4vw, 108px)/.94 var(--wordmark); letter-spacing: -.065em; text-wrap: balance; overflow-wrap: anywhere; }
.masthead h1 em { font: var(--wordmark-em); letter-spacing: -.04em; }
.masthead h1 > span { color: var(--band-accent); }
.masthead > p:not(.masthead-line) { max-width: 30ch; color: var(--band-muted); font-size: 15px; line-height: 1.5; text-align: right; margin-bottom: 10px; }
.masthead-line { grid-column: 1 / -1; display: flex; flex-wrap: wrap; gap: 6px 0; margin-top: 8px; color: var(--band-muted); font: 500 11px/1.3 var(--mono); letter-spacing: .14em; text-transform: uppercase; font-variant-numeric: tabular-nums; }
.masthead-line span + span::before { content: "·"; margin: 0 14px; opacity: .6; }
[data-active-edition] .masthead { padding-bottom: clamp(28px, 4vw, 56px); }
.masthead-cta { grid-column: 1 / -1; margin: 4px 0 0; }

/* ---- hero ---- */
.hero { position: relative; margin-top: calc(-1 * var(--hero-lift)); border-radius: var(--r-l); overflow: hidden; background: var(--scrim); box-shadow: var(--sh-hero); isolation: isolate; }
[data-active-edition] .hero { margin-top: 48px; }
.lead-image { display: block; position: relative; aspect-ratio: 16 / 9; min-height: 420px; }
.lead-image img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: var(--cover-pos, 50% 40%); display: block; }
.lead-image::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, rgb(11 10 20 / 0) 30%, rgb(11 10 20 / .55) 62%, var(--scrim) 100%); }
.cover-tab { position: absolute; top: 20px; left: 20px; z-index: 2; padding: 9px 13px; border: 1px solid var(--acid); color: var(--acid); border-radius: var(--r-pill); font: 750 11px/1 var(--sans); letter-spacing: .14em; text-transform: uppercase; }
.hero-type { position: absolute; left: 0; right: 0; bottom: 0; z-index: 2; padding: clamp(20px, 3vw, 48px); color: var(--over-image); max-width: min(100%, 780px); }
.hero-type .meta { color: var(--over-image-muted); }
.hero-type .pill { background: rgb(255 255 255 / .14); color: var(--over-image); }
.hero h2 { margin: 14px 0 12px; font: var(--display-weight) clamp(32px, 1.4rem + 3.2vw, 68px)/1.02 var(--display); letter-spacing: var(--display-track); max-width: 18ch; text-wrap: balance; text-shadow: 0 2px 24px rgb(0 0 0 / .35); }
.hero h2 a { color: inherit; }
.hero h2 a:hover { text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: .1em; text-decoration-color: rgb(255 255 255 / .6); }
.hero-type > p { color: var(--over-image-muted); max-width: 56ch; font-size: clamp(15px, 1rem + .3vw, 19px); line-height: 1.5; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.hero .read-link { background: var(--over-image); color: var(--scrim); margin-top: 20px; }
.hero .read-link:hover { background: var(--acid); color: var(--on-acid); }

/* ---- cards ---- */
.story-grid { display: grid; grid-template-columns: repeat(var(--cols), minmax(0, 1fr)); gap: 36px 28px; }
.story-grid-3 { --cols: 3; }
.library .story-grid { counter-reset: story; }
.library .story { counter-increment: story; }
.story { min-width: 0; }
.story-link { display: flex; flex-direction: column; height: 100%; color: inherit; text-decoration: none; background: var(--card); border: 1px solid var(--rule-soft); border-radius: var(--r-m); overflow: hidden; box-shadow: var(--sh-1); transition: transform .24s var(--ease), box-shadow .24s var(--ease); }
.story-img { aspect-ratio: 3 / 2; overflow: hidden; background: var(--tint); }
.story-img img { width: 100%; height: 100%; object-fit: cover; display: block; transition: transform .6s var(--ease); }
.story-body { display: flex; flex-direction: column; flex: 1; padding: 18px 20px 20px; }
.story-meta { display: flex; align-items: center; gap: 10px; }
.library .story-meta::before { content: counter(story, decimal-leading-zero); font: 600 12px/1 var(--mono); letter-spacing: .06em; color: var(--muted); }
.story-meta time { margin-left: auto; color: var(--muted); font: 600 13px/1 var(--sans); font-variant-numeric: tabular-nums; }
.story h3 { margin: 12px 0 8px; font: var(--display-weight) clamp(20px, 1.05rem + .55vw, 24px)/1.18 var(--display); letter-spacing: -.012em; text-wrap: balance; overflow-wrap: anywhere; }
.story p { color: var(--muted); font-size: 15px; line-height: 1.55; }
.story-more { margin-top: auto; padding-top: 14px; font: 700 13px/1 var(--sans); color: var(--ink); }
.story-more i { font-style: normal; }
@media (hover: hover) {
  .story-link:hover, .story-link:focus-visible { transform: translateY(-4px); box-shadow: var(--sh-2); }
  .story-link:hover img { transform: scale(1.04); }
  .story-link:hover h3 { text-decoration: underline; text-decoration-color: var(--link-underline); text-underline-offset: .14em; }
}
@media (min-width: 1025px) {
  [data-page-type="home"][data-page-number="1"] .library .story:first-child:not([hidden]) { grid-column: span 2; }
  [data-page-type="home"][data-page-number="1"] .library .story:first-child .story-link { flex-direction: row; }
  [data-page-type="home"][data-page-number="1"] .library .story:first-child .story-img { flex: 0 0 50%; aspect-ratio: auto; }
  [data-page-type="home"][data-page-number="1"] .library .story:first-child .story-body { padding: 28px 32px; justify-content: center; }
  [data-page-type="home"][data-page-number="1"] .library .story:first-child h3 { font-size: clamp(26px, 1.3rem + 1.2vw, 32px); line-height: 1.12; letter-spacing: -.018em; }
}
.empty-index { color: var(--muted); padding-block: 18px; max-width: 60ch; }

/* ---- section heads, chips, pager, crumbs ---- */
.section-head { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 16px 24px; padding-top: 20px; margin-bottom: 32px; border-top: var(--rule-head); box-shadow: var(--rule-head-shadow); }
.section-head h2, .related h2, .not-found h2 { font: var(--display-ui-weight) clamp(28px, 1.3rem + 1.8vw, 44px)/1.04 var(--display-ui); letter-spacing: -.05em; }
.library { margin-top: var(--gap-section); }
.hero + .library { margin-top: 64px; }
.rubrics { display: flex; gap: 8px; flex-wrap: wrap; }
.rubrics a { display: inline-flex; align-items: center; gap: 8px; min-height: 44px; padding: 0 16px; border: 1px solid var(--rule-strong); border-radius: var(--r-pill); font: 680 14px/1 var(--sans); color: var(--ink); background: transparent; transition: background .12s, border-color .12s; }
.rubrics a[data-rubric]:not([data-rubric=""])::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: var(--rubric); }
.rubrics a:hover { background: var(--tint); border-color: var(--ink); }
.rubrics a[aria-current] { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.pager { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-top: 48px; padding-top: 20px; border-top: 1px solid var(--rule); }
.pager-list { display: flex; gap: 4px; list-style: none; margin: 0; padding: 0; }
.pager-list a, .pager-list span { display: grid; place-items: center; min-width: 44px; min-height: 44px; border-radius: 50%; font: 700 14px/1 var(--sans); }
.pager-list a:hover { background: var(--tint); }
.pager-list span[aria-current] { background: var(--ink); color: var(--paper); }
.pager-gap { display: grid; place-items: center; min-width: 24px; color: var(--muted); }
.pager-step { min-height: 44px; display: inline-flex; align-items: center; gap: 8px; font: 700 14px/1 var(--sans); }
.pager-step.is-off { color: var(--muted); opacity: .5; }
.crumbs { display: flex; flex-wrap: wrap; align-items: center; gap: 4px 10px; margin-top: 24px; font: 600 13px/1.3 var(--sans); color: var(--muted); }
.crumbs a:hover { color: var(--ink); }
.crumbs > span[aria-hidden] { opacity: .6; }
.crumbs > span:last-child { color: var(--ink); max-width: 38ch; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* ---- rubric page, prose pages, 404 ---- */
.rubric-head { padding: 8px 0 24px; }
.rubric-head h1, .page-prose h1, .not-found h1 { font: var(--display-weight) clamp(36px, 1.6rem + 3vw, 64px)/1.04 var(--display); letter-spacing: -.02em; text-wrap: balance; }
.rubric-head h1 { display: inline-flex; align-items: center; gap: 16px; margin: 18px 0 6px; padding-bottom: 8px; border-bottom: 6px solid var(--rubric); }
.rubric-head h1::before { content: ""; width: 14px; height: 14px; border-radius: 50%; background: var(--rubric); flex: none; }
.rubric-note { max-width: 64ch; margin-top: 14px; color: var(--muted); font-size: clamp(16px, 1rem + .3vw, 19px); line-height: 1.5; }
.rubric-head .meta { margin-top: 12px; }
.page-prose { max-width: 720px; margin: 0 auto var(--gap-section); }
.page-prose h1 { margin: 18px 0 24px; }
.page-prose h2 { margin: 40px 0 14px; padding-top: 16px; border-top: var(--rule-head); box-shadow: var(--rule-head-shadow); font: var(--display-weight) clamp(24px, 1.2rem + 1.3vw, 34px)/1.18 var(--display); letter-spacing: -.015em; }
.prose p { font-size: clamp(17px, 1rem + .25vw, 19px); line-height: 1.72; }
.prose p + p { margin-top: 16px; }
.prose p:first-child::first-letter { float: left; margin: 6px 10px 0 0; font: var(--display-weight) 4.2em/.78 var(--display); color: var(--heading-strong); }
.about-tiles { display: grid; gap: 10px; }
.about-tiles-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.rubric-tile { display: grid; grid-template-columns: 12px 1fr; gap: 12px; align-items: start; padding: 14px 16px; border-radius: var(--r-s); background: var(--card); border: 1px solid var(--rule-soft); transition: border-color .16s, transform .16s var(--ease); }
.rubric-tile:hover { border-color: var(--ink); transform: translateY(-2px); }
.rubric-dot { width: 12px; height: 12px; margin-top: 5px; border-radius: 50%; background: var(--rubric); }
.rubric-tile b { display: block; font: 700 15px/1.3 var(--sans); }
.rubric-tile small { display: block; margin-top: 2px; color: var(--muted); font-size: 13px; line-height: 1.45; }
.contact-list { display: grid; gap: 14px; }
.contact-list dt { font: 750 11px/1.2 var(--sans); letter-spacing: .14em; text-transform: uppercase; color: var(--muted); }
.contact-list dd a { font-weight: 650; text-decoration: underline; text-decoration-color: var(--link-underline); text-underline-offset: .16em; }
.not-found { position: relative; padding: 48px 0 80px; min-height: 60vh; }
.not-found::before { content: "404"; position: absolute; right: 0; top: -12px; font: var(--display-weight) clamp(140px, 22vw, 260px)/1 var(--display); letter-spacing: -.06em; color: var(--tint); pointer-events: none; user-select: none; z-index: -1; }
@supports (color: color-mix(in srgb, red, blue)) { .not-found::before { color: color-mix(in srgb, var(--ink) 6%, var(--paper)); } }
.not-found h1 { margin: 14px 0 16px; }
.not-found-text { max-width: 54ch; color: var(--muted); font-size: 18px; }
.not-found-actions { margin: 22px 0 56px; }

/* ---- article ---- */
.reader-head { max-width: 860px; margin: 40px auto 28px; text-align: center; }
.reader-head .meta { justify-content: center; gap: 14px; }
.reader-head h1 { margin: 18px auto 16px; max-width: 20ch; font: var(--display-weight) clamp(34px, 1.4rem + 3.4vw, 66px)/1.04 var(--display); letter-spacing: -.022em; text-wrap: balance; overflow-wrap: anywhere; }
.reader-head > p { max-width: 60ch; margin: 0 auto; color: var(--muted); font-size: clamp(17px, 1rem + .4vw, 21px); line-height: 1.5; }
.reader-updated { display: inline-flex; margin-top: 14px; padding: 7px 12px; border: 1px solid var(--rule-strong); border-radius: var(--r-pill); font: 600 12px/1 var(--sans); color: var(--muted); font-variant-numeric: tabular-nums; }
.reader-invite { margin: 0 auto 28px; max-width: 860px; padding: 14px 18px; border: 1px solid var(--ink); background: var(--card); border-radius: var(--r-s); display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 12px; }
.reader-invite > div > span { display: block; margin-bottom: 3px; color: var(--heading-strong); font: 750 11px/1.3 var(--sans); letter-spacing: .14em; text-transform: uppercase; }
.reader-invite p { max-width: 60ch; color: var(--muted); font-size: 14px; line-height: 1.5; }
.reader-invite a { flex: none; display: inline-flex; align-items: center; gap: 10px; min-height: 44px; padding: 0 18px; color: var(--paper); background: var(--ink); border-radius: var(--r-pill); font: 750 13px/1 var(--sans); }
.reader-invite a:hover { background: var(--heading-strong); }
.practice-back { display: inline-flex; align-items: center; gap: 8px; margin-top: 20px; padding: 0 16px; min-height: 40px; color: var(--on-acid); background: var(--acid); border-radius: var(--r-pill); font: 750 13px/1 var(--sans); }
.reader-cover { margin: 0; display: flex; flex-direction: column; }
.reader-cover img { display: block; width: 100%; height: auto; aspect-ratio: 16 / 9; object-fit: cover; object-position: var(--cover-pos, 50% 40%); border-radius: var(--r-l); box-shadow: var(--sh-hero); background: var(--tint); }
.reader-cover figcaption { display: flex; gap: 10px; align-items: center; padding: 12px 4px 0; color: var(--muted); font: 500 13px/1.45 var(--sans); }
.reader-cover figcaption::before { content: ""; width: 20px; height: 2px; background: var(--acid); flex: none; }
.reader-cover figcaption > b { font: 600 12px/1 var(--mono); letter-spacing: .06em; color: var(--ink); }
.reader-layout { display: grid; grid-template-columns: 240px minmax(0, 680px); justify-content: center; gap: clamp(40px, 7vw, 96px); margin-top: 48px; align-items: start; }
.reader-aside { position: sticky; top: 88px; border-top: var(--rule-head); box-shadow: var(--rule-head-shadow); padding-top: 14px; }
.contents-title, .share-label { font: 750 11px/1.2 var(--sans); letter-spacing: .14em; text-transform: uppercase; color: var(--muted); }
.contents ol { list-style: none; margin: 10px 0 0; padding: 0; counter-reset: toc; }
.contents li a { display: grid; grid-template-columns: 28px 1fr; gap: 0 6px; padding: 6px 0 6px 10px; margin-left: -12px; border-left: 2px solid transparent; font: 500 14px/1.4 var(--sans); color: var(--ink); transition: border-color .16s; }
.contents li a::before { content: counter(toc, decimal-leading-zero); counter-increment: toc; font: 600 12px/1.7 var(--mono); color: var(--muted); }
.contents li a:hover { border-left-color: var(--rule-strong); }
.contents li a[aria-current] { font-weight: 700; border-left-color: var(--rubric); }
.share-block { margin-top: 28px; }
.share-row { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 10px; }
.share-net, .share { display: inline-grid; place-items: center; width: 44px; height: 44px; border-radius: 50%; border: 1px solid var(--rule-strong); background: var(--card); color: var(--ink); cursor: pointer; transition: background .16s, color .16s; }
.share-net:hover, .share:hover { background: var(--ink); color: var(--paper); }
.share { width: auto; padding: 0 16px; border-radius: var(--r-pill); border-color: var(--ink); font: 700 13px/1 var(--sans); }
.share.is-copied { background: var(--acid); color: var(--on-acid); border-color: var(--acid); }
.share-status, .share-manual { display: block; margin-top: 8px; color: var(--muted); font-size: 12px; }
.share-manual input { width: 100%; margin-top: 4px; padding: 6px 8px; border: 1px solid var(--rule); border-radius: var(--r-xs); background: var(--card); color: var(--ink); }
.takeaways { margin: 0 0 40px; padding: 24px 28px; background: var(--plate); color: var(--plate-ink); border-radius: var(--r-m); }
.takeaways-kicker { color: var(--plate-accent); font: 750 11px/1 var(--sans); letter-spacing: .14em; text-transform: uppercase; }
.takeaways ul { list-style: none; padding: 0; margin: 14px 0 0; display: grid; gap: 12px; counter-reset: tk; }
.takeaways li { counter-increment: tk; display: grid; grid-template-columns: 28px 1fr; gap: 12px; font-size: 16px; line-height: 1.55; }
.takeaways li::before { content: counter(tk); font: 600 13px/1.6 var(--mono); color: var(--plate-accent); }
.reader-copy { counter-reset: sec; }
.reader-copy section { margin: 0 0 44px; scroll-margin-top: 96px; }
.reader-copy section[data-reader-section] > h2 { counter-increment: sec; margin: 0 0 14px; font: var(--display-weight) clamp(26px, 1.2rem + 1.3vw, 34px)/1.18 var(--display); letter-spacing: -.015em; text-wrap: balance; }
.reader-copy section[data-reader-section] > h2::before { content: counter(sec, decimal-leading-zero); display: block; margin-bottom: 8px; font: 600 12px/1 var(--mono); letter-spacing: .06em; color: var(--rubric); }
.reader-copy p { font-size: clamp(17px, 1rem + .25vw, 19px); line-height: 1.72; overflow-wrap: break-word; }
.reader-copy p + p { margin-top: 16px; }
.reader-copy section[data-reader-section]:first-of-type > p:first-of-type::first-letter { float: left; margin: 6px 10px 0 0; font: var(--display-weight) 4.4em/.78 var(--display); color: var(--heading-strong); }
.reader-copy a:not(.read-link):not(.vote-choice) { color: var(--ink); text-decoration: underline; text-decoration-color: var(--link-underline); text-underline-offset: .16em; text-decoration-thickness: 1.5px; transition: text-decoration-color .12s; }
.reader-copy a:not(.read-link):hover { text-decoration-color: var(--heading-strong); text-decoration-thickness: 2px; }
.reader-faq { border-top: var(--rule-head); box-shadow: var(--rule-head-shadow); padding-top: 20px; }
.reader-faq > h2 { font: var(--display-ui-weight) clamp(24px, 1.2rem + 1vw, 30px)/1.1 var(--display-ui); letter-spacing: -.04em; margin-bottom: 8px; }
.faq-item { display: grid; grid-template-columns: 28px 1fr; gap: 4px 14px; padding: 18px 0; border-bottom: 1px solid var(--rule); }
.faq-item::before { content: "?"; grid-row: 1 / 3; font: var(--display-weight) 26px/1 var(--display); color: var(--heading-strong); }
.faq-item h3 { font: var(--display-weight) 20px/1.3 var(--display); letter-spacing: -.01em; }
.faq-item p { font-size: 16px; line-height: 1.62; }
.source-notes h2 { font: 750 11px/1.2 var(--sans); letter-spacing: .14em; text-transform: uppercase; color: var(--muted); margin: 32px 0 10px; }
.source-notes ol { list-style: none; padding: 0; counter-reset: src; }
.source-notes li { counter-increment: src; display: grid; grid-template-columns: 28px 1fr; gap: 10px; padding: 6px 0; font-size: 15px; }
.source-notes li::before { content: counter(src, decimal-leading-zero); font: 600 11px/1.9 var(--mono); letter-spacing: .1em; color: var(--muted); }
.source-notes a::after { content: " ↗"; font: 500 12px/1 var(--mono); color: var(--muted); }
.reader-tags { display: flex; flex-wrap: wrap; gap: 8px; list-style: none; padding: 0; margin: 24px 0 0; }
.reader-tags li { padding: 8px 12px; border: 1px solid var(--rule-strong); border-radius: var(--r-pill); font: 650 13px/1 var(--sans); color: var(--muted); }
.reader-copy .reader-poll { margin: 40px 0; padding: clamp(20px, 3vw, 32px); background: var(--tint); border: 1px solid var(--tint-strong); border-radius: var(--r-m); }
.poll-kicker { color: var(--heading-strong); font: 750 11px/1 var(--sans); letter-spacing: .14em; text-transform: uppercase; }
.reader-copy .reader-poll h2 { margin: 8px 0 18px; font: var(--display-weight) clamp(24px, 1.1rem + 1.2vw, 32px)/1.2 var(--display); letter-spacing: -.015em; }
.reader-poll fieldset { padding: 0; margin: 0; border: 0; display: grid; gap: 8px; }
.vote-choice { display: flex; align-items: center; gap: 12px; min-height: 48px; padding: 10px 14px; background: var(--card); border: 1px solid var(--rule); border-radius: var(--r-s); font-size: 15px; cursor: pointer; transition: border-color .16s; }
.vote-choice:hover { border-color: var(--ink); }
.vote-choice:has(:checked) { border-color: var(--ink); box-shadow: inset 0 0 0 1px var(--ink); }
.vote-choice input { accent-color: var(--ink); width: 18px; height: 18px; margin: 0; flex: none; }
.poll-send { margin-top: 14px; }
.poll-send:disabled { opacity: .65; cursor: wait; }
.reader-copy .poll-thanks { font-weight: 750; font-size: 15px; }
.vote-row { display: grid; grid-template-columns: 1fr; gap: 4px; padding: 8px 0; }
.vote-row > div { display: flex; gap: 10px; justify-content: space-between; font-size: 15px; }
.vote-row strong { font: 700 13px var(--mono); }
.vote-row small { background: var(--acid); color: var(--on-acid); border-radius: var(--r-pill); padding: 3px 8px; font: 700 10px/1 var(--sans); letter-spacing: .08em; text-transform: uppercase; white-space: nowrap; }
.vote-row progress { display: block; width: 100%; height: 8px; border: 0; border-radius: 4px; background: var(--tint-strong); accent-color: var(--heading-strong); overflow: hidden; }
.vote-row progress::-webkit-progress-bar { background: var(--tint-strong); }
.vote-row progress::-webkit-progress-value { background: var(--heading-strong); border-radius: 4px; transition: width .5s var(--ease); }
.vote-row progress::-moz-progress-bar { background: var(--heading-strong); border-radius: 4px; }
.reader-copy .poll-count, .reader-copy [data-poll-status], .poll-refresh { color: var(--muted); font-size: 13px; }
.reader-copy .poll-count { margin: 12px 0 0; }
.reader-copy [data-poll-status] { margin: 3px 0 0; }
[data-poll-status]:empty { display: none; }
.poll-refresh { text-decoration: underline; }
.end-link { margin-top: 8px; }
.reader-cta-wrap { margin: 32px 0 8px; padding-top: 24px; border-top: var(--rule-head); box-shadow: var(--rule-head-shadow); }
.reader-cta, .reader-cta:hover { background: var(--acid); color: var(--on-acid); min-height: 54px; font-size: 16px; }
.reader-cta:hover { filter: brightness(.96); }
.related { margin: var(--gap-section) 0; }

/* ---- about strip ---- */
.about-strip { background: var(--tint); border-block: 1px solid var(--tint-strong); padding: clamp(48px, 6vw, 88px) 0; margin-top: var(--gap-section); }
.about-strip .j-wrap { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr); gap: clamp(32px, 5vw, 72px); align-items: start; }
.about-strip h2 { margin: 12px 0 16px; font: var(--display-weight) clamp(28px, 1.3rem + 1.6vw, 40px)/1.15 var(--display); letter-spacing: -.018em; text-wrap: balance; }
.about-strip p:not(.kicker) { color: var(--muted); font-size: 16px; line-height: 1.62; max-width: 52ch; }
.about-strip .read-link { margin-top: 22px; }

/* ---- footer band ---- */
.j-footer { padding: 0 0 28px; margin-top: var(--gap-section); }
.about-strip + .j-footer, .j-footer:first-child { margin-top: 0; }
.footer-cta { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 16px 24px; padding: 36px 0; border-bottom: 1px solid var(--band-rule); }
.footer-cta p { font: var(--display-ui-weight) clamp(22px, 1.2rem + 1.2vw, 32px)/1.1 var(--display-ui); letter-spacing: -.04em; }
.footer-cta-actions { display: flex; gap: 10px; flex-wrap: wrap; }
.footer-cta .task-link { min-height: 48px; display: inline-flex; align-items: center; gap: 8px; padding: 0 22px; border-radius: var(--r-pill); font: 750 14px/1 var(--sans); }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 32px; padding: 48px 0 32px; border-bottom: 1px solid var(--band-rule); }
.foot-title { font: var(--wordmark-weight) 32px/1 var(--wordmark); letter-spacing: -.06em; }
.foot-title em { font: var(--wordmark-em); }
.foot-tagline { margin-top: 12px; color: var(--band-muted); font-size: 14px; line-height: 1.5; max-width: 30ch; }
.footer-col { display: grid; align-content: start; justify-items: start; }
.footer-col-title { color: var(--band-muted); font: 750 11px/1 var(--sans); letter-spacing: .14em; text-transform: uppercase; margin-bottom: 12px; }
.footer-col a { display: flex; align-items: center; min-height: 40px; color: var(--band-ink); font: 600 15px/1 var(--sans); }
.footer-col a:hover { color: var(--band-accent); }
.footer-note { padding-top: 20px; color: var(--band-muted); font-size: 13px; display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.footer-note a { color: var(--band-ink); font-weight: 650; }

/* ---- gift-task edition (account-bound) ---- */
.task-strip { background: var(--plate); color: var(--plate-ink); border-bottom: 1px solid var(--plate-rule); }
.task-strip .j-wrap { display: flex; flex-wrap: wrap; align-items: center; gap: 16px 32px; min-height: 72px; padding-block: 10px; }
.strip-identity { display: flex; align-items: center; gap: 11px; min-width: 0; margin-right: auto; }
.strip-identity img { width: 47px; height: 47px; padding: 3px; object-fit: contain; flex: none; border-radius: var(--r-s); background: var(--iris); }
.strip-identity > div, .strip-time, .strip-progress { display: grid; gap: 2px; }
.strip-identity b { font: var(--display-weight) 20px/1.1 var(--display); }
.task-strip :is(.strip-identity, .strip-time, .strip-progress) span, .practice-label, #code-result label { color: var(--plate-muted); font: 750 10px/1.3 var(--sans); letter-spacing: .14em; text-transform: uppercase; }
#task-timer { font: 600 clamp(20px, 1rem + 1vw, 26px)/1 var(--mono); color: var(--plate-accent); font-variant-numeric: tabular-nums; }
.strip-progress b { font: 650 16px/1.35 var(--mono); }
.strip-jump, .practice-action { display: inline-flex; align-items: center; justify-content: space-between; gap: 10px; min-height: 44px; padding: 0 18px; border-radius: var(--r-pill); font: 750 14px/1 var(--sans); cursor: pointer; }
.strip-jump:hover, .practice-action:enabled:hover, .practice-action[href]:hover { filter: brightness(.95); }
.practice { margin: 48px 0 var(--gap-section); border-top: var(--rule-head); box-shadow: var(--rule-head-shadow); padding-top: 20px; scroll-margin-top: 96px; }
.practice-title h2 { margin: 6px 0 8px; font: var(--display-ui-weight) clamp(27px, 1.3rem + 1.8vw, 40px)/1.06 var(--display-ui); letter-spacing: -.05em; }
.practice-title > p:last-child { max-width: 630px; font-size: 15px; color: var(--muted); }
.practice-label { color: var(--heading-strong); }
.practice-layout { display: grid; grid-template-columns: minmax(0, 1fr) minmax(255px, 320px); gap: clamp(20px, 4vw, 56px); align-items: start; margin-top: 18px; }
.practice-nav { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; }
.practice-nav a { display: flex; align-items: center; gap: 9px; position: relative; min-height: 48px; padding: 9px 14px; border: 1px solid var(--rule-soft); border-radius: var(--r-s); background: var(--card); box-shadow: var(--sh-1); }
.practice-nav a:hover, .practice-nav a[aria-current] { border-color: var(--ink); }
.practice-nav b { font-size: 14px; }
.step-no { color: var(--muted); font: 650 11px/1.3 var(--mono); }
.step-marker { margin-left: auto; }
.step-marker::after { content: '↗'; color: var(--muted); font-size: 14px; }
[data-complete=true] .step-marker::after { content: '✓'; display: grid; place-items: center; width: 20px; height: 20px; background: var(--acid); color: var(--on-acid); border-radius: 50%; font-weight: 750; font-size: 12px; }
.choose-step, .practice-pane { margin-top: 12px; border: 1px solid var(--rule-soft); background: var(--card); border-radius: var(--r-m); padding: clamp(16px, 2vw, 24px); box-shadow: var(--sh-1); }
.choose-step { font-size: 14px; color: var(--muted); }
.practice-pane h3, .practice-result h3 { font: var(--display-weight) clamp(23px, 1.1rem + 1.2vw, 32px)/1.15 var(--display); letter-spacing: -.015em; margin: 6px 0 10px; }
.practice-pane > p:not(.practice-label) { color: var(--muted); font-size: 15px; line-height: 1.6; }
.context-read { display: inline-flex; align-items: center; gap: 8px; margin-top: 14px; font: 730 13px/1 var(--sans); text-decoration: underline; text-underline-offset: 3px; text-decoration-color: var(--link-underline); }
.practice-result { padding: 22px; color: var(--plate-ink); background: var(--plate); border-radius: var(--r-m); }
.practice-result .practice-label { color: var(--plate-accent); }
.practice-result h3 { margin-top: 6px; }
.practice-time, .practice-meter { display: flex; align-items: center; justify-content: space-between; gap: 9px; color: var(--plate-muted); line-height: 1.35; font-size: 12px; }
.practice-time { margin: 12px 0; padding-block: 10px; border-block: 1px solid var(--plate-rule); }
.practice-time b, .practice-meter b { color: var(--plate-accent); font: 700 16px/1.2 var(--mono); font-variant-numeric: tabular-nums; }
.practice-meter b { color: var(--plate-ink); font-size: 13px; }
#qa-progress { width: 100%; height: 6px; display: block; margin-top: 6px; border: 0; border-radius: 4px; overflow: hidden; background: var(--plate-rule); accent-color: var(--plate-accent); }
#qa-progress::-webkit-progress-bar { background: var(--plate-rule); } #qa-progress::-webkit-progress-value { background: var(--plate-accent); } #qa-progress::-moz-progress-bar { background: var(--plate-accent); }
#task-hint { margin: 12px 0; color: var(--plate-muted); font-size: 13px; }
.practice-action { width: 100%; }
.practice-action:disabled { background: var(--plate-rule); color: var(--plate-muted); cursor: default; filter: none; }
#code-result { display: grid; gap: 4px; padding: 12px; margin-bottom: 8px; border: 1px dashed var(--plate-muted); border-radius: var(--r-s); }
#task-code { font: 750 24px/1.2 var(--mono); letter-spacing: .055em; }
#task-copy, #task-retry { width: fit-content; background: none; color: var(--plate-accent); border: 0; padding: 5px 0; font: 700 12px/1 var(--sans); text-decoration: underline; text-underline-offset: 3px; cursor: pointer; }
.practice-error { margin-top: 10px; color: var(--plate-accent); font-size: 13px; }
.practice-pane fieldset { padding: 0; border: 0; margin: 0; }
.practice-pane legend { font-size: 13px; margin-bottom: 8px; }
.answer-choice { display: inline-flex; align-items: center; gap: 6px; min-height: 40px; margin: 0 6px 6px 0; padding: 7px 12px; border: 1px solid var(--rule-strong); border-radius: var(--r-pill); background: var(--card); font-size: 13px; cursor: pointer; }
.answer-choice:has(:checked) { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.answer-choice input { accent-color: var(--ink); }
.practice-pane .read-link { border: 0; cursor: pointer; margin-top: 12px; }
.reader-task-meter { display: flex; align-items: center; gap: 8px; width: fit-content; max-width: 100%; margin: 14px 0; padding: 8px 12px; background: var(--tint); border: 1px solid var(--tint-strong); border-radius: var(--r-s); }
.reader-task-meter span { display: grid; gap: 2px; }
.reader-task-meter b, .reader-task-meter small { font-size: 11px; line-height: 1.25; }
.reader-task-meter small { color: var(--muted); }
.reader-task-meter strong { font: 700 15px var(--mono); letter-spacing: -.05em; }
.reader-task-meter i { font-style: normal; }
[data-reader-practice] { margin-top: clamp(25px, 4vw, 55px); }
[data-reader-practice] .practice-title h2 { font-family: var(--display); font-weight: var(--display-weight); letter-spacing: -.02em; }

/* ---- edition variants: structure only; colours come from /theme.css ---- */
html:not([data-band="ink"]) .topbar.is-stuck { box-shadow: 0 1px 0 var(--band-rule), 0 12px 32px -16px rgb(8 8 18 / .25); }
html[data-band="paper"] .j-header, html[data-band="tint"] .j-header { border-bottom: 1px solid var(--band-rule); }
html[data-band="paper"] .j-footer, html[data-band="tint"] .j-footer { border-top: 1px solid var(--band-rule); }
html[data-type="modern"] { --display: var(--sans); --display-weight: 800; --display-track: -.045em; --wordmark-em: 800 1em var(--sans); }
html[data-type="modern"] .masthead h1 em { color: var(--band-accent); }
html[data-type="modern"] .reader-head h1 { letter-spacing: var(--display-track); }
html[data-type="classic"] { --display: var(--serif); --display-ui: var(--serif); --display-ui-weight: 700; --body: var(--serif); --wordmark: var(--serif); --wordmark-weight: 700; }
html[data-shape="sharp"] { --r-xs: 0; --r-s: 0; --r-m: 0; --r-l: 0; --r-pill: 2px; }
html[data-shape="sharp"] :is(.pager-list a, .pager-list span, .share-net, .share) { border-radius: 0; }
html[data-shape="round"] { --r-xs: 6px; --r-s: 12px; --r-m: 20px; --r-l: 30px; }
html[data-cards="flat"] .story-link { background: transparent; border: 0; box-shadow: none; border-radius: 0; }
html[data-cards="flat"] .story-img { border-radius: var(--r-m); }
html[data-cards="flat"] .story-body { padding: 16px 0 0; }
html[data-cards="flat"] .story { border-top: 1px solid var(--rule); padding-top: 16px; }
html[data-cards="outlined"] .story-link { box-shadow: none; border: 1.5px solid var(--rule-strong); }
@media (hover: hover) {
  html[data-cards="flat"] .story-link:hover, html[data-cards="flat"] .story-link:focus-visible { transform: none; box-shadow: none; }
  html[data-cards="outlined"] .story-link:hover, html[data-cards="outlined"] .story-link:focus-visible { transform: none; box-shadow: none; border-color: var(--ink); }
}
html:not([data-hero="cover"]) .lead-image::after { content: none; }
html:not([data-hero="cover"]) .hero-type { position: static; color: var(--ink); max-width: none; }
html:not([data-hero="cover"]) .hero h2 { color: var(--ink); text-shadow: none; }
html:not([data-hero="cover"]) .hero-type .meta, html:not([data-hero="cover"]) .hero-type > p { color: var(--muted); }
html:not([data-hero="cover"]) .hero-type .pill { background: var(--tint); color: var(--ink); }
html:not([data-hero="cover"]) .hero .read-link { background: var(--ink); color: var(--paper); }
html:not([data-hero="cover"]) .hero .read-link:hover { background: var(--heading-strong); color: var(--paper); }
html[data-hero="split"] .hero { display: grid; grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); background: var(--card); box-shadow: var(--sh-2); }
html[data-hero="split"] .lead-image { aspect-ratio: auto; min-height: 420px; }
html[data-hero="split"] .hero-type { padding: clamp(24px, 3vw, 48px); align-self: center; }
html[data-hero="split"] .hero h2 { font-size: clamp(28px, 1.2rem + 2vw, 48px); }
html[data-hero="stack"] .hero { background: transparent; box-shadow: none; border-radius: 0; overflow: visible; }
html[data-hero="stack"] .lead-image { aspect-ratio: 21 / 9; min-height: 300px; border-radius: var(--r-l); overflow: hidden; box-shadow: var(--sh-hero); }
html[data-hero="stack"] .hero-type { padding: 28px 0 0; max-width: 860px; }
html[data-grid="2"] { --cols: 2; }
html[data-grid="4"] { --cols: 4; }
html[data-ornament="quiet"], html[data-ornament="none"] { --rule-head: 1px solid var(--rule); --rule-head-shadow: none; }
html[data-ornament="none"] .library .story-meta::before,
html[data-ornament="none"] .reader-copy section[data-reader-section] > h2::before,
html[data-ornament="none"] .contents li a::before,
html[data-ornament="none"] .source-notes li::before { content: none; }
html[data-ornament="none"] .contents li a, html[data-ornament="none"] .source-notes li { grid-template-columns: 1fr; }
html[data-ornament="none"] .prose p:first-child::first-letter,
html[data-ornament="none"] .reader-copy section[data-reader-section]:first-of-type > p:first-of-type::first-letter { float: none; margin: 0; font: inherit; color: inherit; }
[data-preview] a, [data-preview] button, [data-preview] form { pointer-events: none; }   /* admin preview frame: look, don't navigate */
@media (min-width: 1025px) { html[data-cards="flat"] [data-page-type="home"][data-page-number="1"] .library .story:first-child .story-body { padding: 4px 0 0 28px; } }
@media (max-width: 1280px) { html[data-grid="4"] { --cols: 3; } }
@media (max-width: 900px) { html[data-hero="split"] .hero { grid-template-columns: 1fr; } html[data-hero="split"] .lead-image { aspect-ratio: 16 / 9; min-height: 0; } }
@media (max-width: 620px) {
  html[data-hero="stack"] .lead-image { border-radius: 0; box-shadow: none; }
  html[data-hero="stack"] .hero-type { padding: 24px var(--gutter) 0; }
  html[data-hero="split"] .hero { box-shadow: none; }
  html[data-hero="split"] .hero-type { padding: 24px var(--gutter); }
}

/* ---- responsive ---- */
@media (max-width: 1024px) {
  .story-grid, .story-grid-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
}
@media (max-width: 900px) {
  .reader-head, .reader-head h1, .reader-head > p { text-align: left; margin-inline: 0; }
  .reader-head .meta { justify-content: flex-start; }
  .reader-layout { grid-template-columns: 1fr; gap: 32px; margin-top: 32px; }
  .reader-aside { position: static; }
  .contents li a { padding-block: 4px; }
  .about-strip .j-wrap { grid-template-columns: 1fr; }
  .practice-layout { grid-template-columns: 1fr; gap: 16px; }
  .lead-image { aspect-ratio: 4 / 3; min-height: 360px; }
}
@media (min-width: 901px) { .reader-crumbs { justify-content: center; } }
@media (max-width: 620px) {
  .topbar .j-wrap { min-height: 56px; gap: 10px; }
  .utility-nav { gap: 10px; }
  .utility-nav a { font-size: 13px; }
  .task-link { padding: 0 14px; min-height: 36px; }
  body:not([data-active-edition]) .catalog-link { display: none; }
  .imprint { font-size: 9px; letter-spacing: .1em; white-space: nowrap; }
  .imprint svg { width: 22px; height: 22px; }
  .rubric-nav { gap: 20px; font-size: 13px; }
  .masthead { grid-template-columns: 1fr; padding-bottom: 48px; }
  .masthead > p:not(.masthead-line) { text-align: left; margin-bottom: 0; }
  .masthead-line span + span::before { margin: 0 8px; }
  .hero { margin-top: -24px; margin-inline: calc(-1 * var(--gutter)); border-radius: 0; box-shadow: none; }
  [data-active-edition] .hero { margin-top: 24px; }
  .lead-image { aspect-ratio: 4 / 3; min-height: 400px; }
  .cover-tab { top: 14px; left: 14px; }
  .hero-type > p { -webkit-line-clamp: 2; }
  .hero + .library { margin-top: 44px; }
  .library { margin-top: 48px; }
  .section-head { margin-bottom: 20px; }
  .rubrics { flex-wrap: nowrap; overflow-x: auto; scrollbar-width: none; margin-inline: calc(-1 * var(--gutter)); padding-inline: var(--gutter) 40px; padding-bottom: 4px;
    -webkit-mask-image: linear-gradient(90deg, #000 calc(100% - 32px), transparent); mask-image: linear-gradient(90deg, #000 calc(100% - 32px), transparent); }
  .rubrics::-webkit-scrollbar { display: none; }
  .rubrics a { flex: none; }
  .story-grid, .story-grid-3 { grid-template-columns: 1fr; gap: 24px; }
  .pager { flex-wrap: wrap; justify-content: center; }
  .rubric-head h1 { font-size: 40px; }
  .reader-head { margin-top: 24px; }
  .reader-head h1 { font-size: clamp(30px, 8vw, 40px); }
  .reader-cover img { aspect-ratio: 3 / 2; border-radius: 0; box-shadow: none; }
  .reader-cover { margin-inline: calc(-1 * var(--gutter)); }
  .reader-cover figcaption { padding-inline: var(--gutter); }
  .takeaways { padding: 18px 18px; }
  .page-prose h1, .not-found h1 { font-size: 40px; }
  .not-found::before { font-size: 140px; }
  .about-tiles-2 { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; padding: 32px 0 24px; }
  .footer-cta { padding: 28px 0; }
  .task-strip .j-wrap { gap: 10px 16px; }
  .strip-identity img { width: 36px; height: 36px; }
  .strip-identity b { font-size: 16px; }
  .strip-progress { display: none; }
  .strip-jump { min-height: 40px; padding: 0 14px; font-size: 13px; }
  .practice-nav a { min-height: 44px; padding: 8px 10px; }
  .practice-nav b { font-size: 12px; }
}
@media (max-width: 380px) { .imprint span { max-width: 110px; overflow: hidden; text-overflow: ellipsis; } .strip-identity img { display: none; } }
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; animation: none !important; scroll-behavior: auto !important; }
}
@media print {
  .topbar, .rubric-nav, .reader-aside, .reader-poll, .related, .j-footer, .task-strip, .practice, .reader-invite, .about-strip, .pager, .skip-link { display: none !important; }
  .j-header { background: none; color: #000; }
  body { background: #fff; color: #000; font-size: 12pt; }
  .reader-layout { display: block; }
  .reader-cover img, .hero, .story-link, .lead-image { box-shadow: none; }
  a[href^="http"]::after { content: " (" attr(href) ")"; font-size: 85%; color: #555; }
}