:root {
  --ink: #1a1b1b;
  --ink-soft: #4e5555;
  --paper: #fbfbf8;
  --paper-strong: #eef1f0;
  --blue: #0071bc;
  --blue-dark: #00598f;
  --coral: #eb1b2d;
  --yellow: #ffe000;
  --line: rgba(26, 27, 27, 0.17);
  --serif: "Source Serif 4", Georgia, serif;
  --sans: "DM Sans", Arial, sans-serif;
  --mono: "DM Mono", monospace;
  --condensed: "Barlow Condensed", "Arial Narrow", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.5;
}
button, input, textarea { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
a { color: inherit; text-decoration-thickness: 1px; text-underline-offset: 3px; }
button { cursor: pointer; }
::selection { background: #a9d6e8; }
mark { padding: 0 .08em; background: #ffe78a; color: inherit; }

.shell { width: min(1180px, calc(100% - 48px)); margin: 0 auto; }
.skip-link { position: fixed; top: -100px; left: 16px; z-index: 10; padding: 10px 14px; background: var(--ink); color: white; }
.skip-link:focus { top: 16px; }
.visually-hidden { position: absolute; width: 1px; height: 1px; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

.site-header { border-bottom: 1px solid var(--line); background: rgba(246, 244, 239, 0.94); position: sticky; top: 0; z-index: 5; backdrop-filter: blur(10px); }
.header-inner { min-height: 82px; display: flex; align-items: center; justify-content: space-between; gap: 26px; }
.wordmark { display: grid; gap: 1px; text-decoration: none; line-height: 1; min-width: 204px; }
.wordmark span { font-family: var(--condensed); font-size: 31px; font-weight: 500; letter-spacing: -0.035em; }
.wordmark i, .site-footer i { font-family: var(--serif); font-weight: 400; }
.wordmark small { color: var(--blue); font-size: 9px; font-weight: 600; letter-spacing: 0.1em; text-transform: uppercase; }
nav { display: flex; align-items: center; gap: 25px; }
nav a { color: var(--ink-soft); font-size: 13px; font-weight: 600; text-decoration: none; }
nav a:hover { color: var(--blue); }
.button:hover span, .text-link:hover span { transform: translate(2px, -2px); }

.hero { position: relative; isolation: isolate; overflow: hidden; border-bottom: 1px solid var(--line); background: #fcfcf9; }
.hero::before {
  content: "";
  position: absolute;
  top: 0;
  right: max(-120px, calc((100vw - 1400px) / 2));
  z-index: -1;
  width: 610px;
  height: 100%;
  opacity: 0.52;
  background:
    radial-gradient(circle at 18% 24%, var(--yellow) 0 7px, transparent 8px),
    radial-gradient(circle at 60% 17%, var(--coral) 0 6px, transparent 7px),
    radial-gradient(circle at 82% 72%, var(--blue) 0 7px, transparent 8px),
    linear-gradient(90deg, transparent 0 18%, rgba(0, 113, 188, 0.16) 18% calc(18% + 1px), transparent calc(18% + 1px) 40%, rgba(0, 113, 188, 0.16) 40% calc(40% + 1px), transparent calc(40% + 1px)),
    linear-gradient(0deg, transparent 0 30%, rgba(0, 113, 188, 0.16) 30% calc(30% + 1px), transparent calc(30% + 1px) 70%, rgba(0, 113, 188, 0.16) 70% calc(70% + 1px), transparent calc(70% + 1px));
  mask-image: linear-gradient(to right, transparent, black 20%, black 80%, transparent);
}
.hero-grid { min-height: 654px; display: grid; grid-template-columns: 1.12fr 0.88fr; align-items: center; gap: 90px; }
.hero-copy { padding: 75px 0; }
.eyebrow { margin: 0 0 13px; color: var(--blue); font-family: var(--mono); font-size: 10px; font-weight: 500; letter-spacing: 0.12em; text-transform: uppercase; }
h1, h2, p { margin-top: 0; }
h1 { margin-bottom: 24px; max-width: 730px; font-family: var(--condensed); font-size: clamp(60px, 7vw, 93px); font-weight: 400; letter-spacing: -0.04em; line-height: 0.87; }
h1 em { color: var(--blue); font-style: italic; }
.hero-intro { max-width: 565px; margin-bottom: 31px; color: var(--ink-soft); font-family: var(--serif); font-size: 20px; line-height: 1.42; }
.hero-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 22px; }
.button { display: inline-flex; align-items: center; justify-content: center; gap: 15px; min-height: 46px; border: 1px solid var(--blue); padding: 11px 17px; font-size: 12px; font-weight: 700; letter-spacing: 0.01em; text-decoration: none; transition: transform 0.2s ease, background-color 0.2s ease, color 0.2s ease; }
.button span { display: inline-block; font-size: 15px; transition: transform 0.2s ease; }
.button:hover { transform: translateY(-2px); }
.button-primary { background: var(--blue); color: #fff; }
.button-primary:hover { background: var(--blue-dark); }
.button-light { border-color: white; background: white; color: var(--blue-dark); }
.button-outline { background: transparent; color: var(--blue); }
.button-outline:hover { background: #dcecf1; }
.text-link { display: inline-flex; align-items: baseline; gap: 8px; border: 0; background: none; color: var(--blue); font-size: 12px; font-weight: 700; text-decoration: none; }
.text-link span { display: inline-block; font-size: 15px; transition: transform 0.2s ease; }
.text-button { padding: 0; }
.hero-stats { display: flex; gap: 34px; margin: 61px 0 0; }
.hero-stats div { min-width: 76px; }
.hero-stats dt { font-family: var(--condensed); font-size: 37px; font-weight: 500; line-height: 0.9; }
.hero-stats dd { margin: 4px 0 0; color: var(--ink-soft); font-family: var(--mono); font-size: 9px; letter-spacing: 0.06em; text-transform: uppercase; }
.hero-stats div::before { content: ""; display: block; width: 7px; height: 7px; margin-bottom: 8px; background: var(--blue); }
.hero-stats div:nth-child(2)::before { background: var(--yellow); }
.hero-stats div:nth-child(3)::before { background: var(--coral); }

.book-panel { width: 430px; height: 568px; justify-self: end; position: relative; overflow: hidden; }
.book-panel__rings { position: absolute; top: 104px; right: -78px; width: 320px; height: 320px; border: 1px solid rgba(0, 113, 188, 0.25); border-radius: 50%; box-shadow: 0 0 0 38px rgba(0, 113, 188, 0.04), 0 0 0 77px rgba(0, 113, 188, 0.035); }
.book-panel__rings::before, .book-panel__rings::after { content: ""; position: absolute; width: 13px; height: 13px; border-radius: 50%; }
.book-panel__rings::before { top: 18px; left: 30px; background: var(--yellow); }
.book-panel__rings::after { right: 4px; bottom: 44px; background: var(--coral); }
.book-image { position: absolute; z-index: 1; top: -150px; left: 50%; width: 920px; max-width: none; transform: translateX(-50%); filter: drop-shadow(16px 17px 12px rgba(26, 27, 27, 0.19)); }
.book-note { position: absolute; right: 8px; bottom: 2px; z-index: 2; display: flex; align-items: center; gap: 7px; margin: 0; color: var(--ink-soft); font-family: var(--mono); font-size: 9px; letter-spacing: 0.02em; transform: rotate(-4deg); }
.book-note span { width: 21px; height: 1px; background: var(--coral); display: inline-block; }

.intro-band { border-bottom: 1px solid var(--line); background: #e3eef1; }
.intro-band__grid { min-height: 157px; display: grid; grid-template-columns: minmax(0, 680px) 1fr; align-items: center; gap: 25px; }
.intro-band__grid > p { margin: 0; font-family: var(--serif); font-size: 23px; letter-spacing: -0.02em; line-height: 1.35; }
.intro-band strong { color: var(--blue); font-weight: 600; }
.arrow-link { justify-self: end; width: 43px; height: 43px; display: grid; place-items: center; border: 1px solid var(--blue); color: var(--blue); font-size: 19px; text-decoration: none; transition: background 0.2s, color 0.2s; }
.arrow-link:hover { background: var(--blue); color: white; }

.section { padding: 114px 0; }
.section-heading { display: flex; align-items: flex-end; justify-content: space-between; gap: 50px; padding-bottom: 30px; border-bottom: 1px solid var(--line); }
h2 { margin-bottom: 0; font-family: var(--condensed); font-size: clamp(45px, 5vw, 66px); font-weight: 400; letter-spacing: -0.035em; line-height: 0.88; }
.section-lede { max-width: 290px; margin: 0 0 3px; color: var(--ink-soft); font-size: 14px; line-height: 1.45; }

.resource-controls { padding: 27px 0 31px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.chapter-filters { display: flex; flex-wrap: wrap; gap: 8px; }
.filter-button { border: 1px solid var(--line); border-radius: 999px; padding: 7px 12px; background: transparent; color: var(--ink-soft); font-size: 11px; font-weight: 600; transition: background 0.2s, color 0.2s, border-color 0.2s; }
.filter-button:hover, .filter-button[aria-pressed="true"] { border-color: var(--blue); background: var(--blue); color: white; }
.search-field { width: min(300px, 100%); display: flex; align-items: center; gap: 9px; padding-bottom: 8px; border-bottom: 1px solid var(--ink); }
.search-field svg { width: 17px; stroke: var(--blue); stroke-width: 1.6; fill: none; flex: 0 0 auto; }
.search-field input { width: 100%; border: 0; outline: 0; background: transparent; color: var(--ink); font-size: 13px; }
.search-field input::placeholder { color: #7e8997; }

.resources-list { border-top: 1px solid var(--line); }
.resource-chapter { display: grid; grid-template-columns: 197px minmax(0, 1fr); gap: 37px; padding: 35px 0 44px; border-bottom: 1px solid var(--line); }
.chapter-index { padding-top: 2px; }
.chapter-index__part { margin: 0 0 8px; color: var(--blue); font-family: var(--mono); font-size: 9px; letter-spacing: 0.09em; text-transform: uppercase; }
.chapter-index h3 { margin: 0; font-family: var(--condensed); font-size: 32px; font-weight: 400; letter-spacing: -0.025em; line-height: 0.98; }
.resource-content { min-width: 0; }
.resource-content__intro { max-width: 850px; margin: 0 0 21px; font-family: var(--serif); font-size: 19px; line-height: 1.43; }
.resource-list { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--line); }
.resource-item { display: grid; grid-template-columns: 39px minmax(0, 1fr); gap: 12px; padding: 14px 0 15px; border-bottom: 1px solid var(--line); }
.resource-item__number { padding-top: 2px; color: var(--blue); font-family: var(--mono); font-size: 9px; letter-spacing: 0.06em; }
.resource-item__title { color: var(--ink); font-size: 13px; font-weight: 700; line-height: 1.3; }
a.resource-item__title { color: var(--blue-dark); text-decoration-color: #9cbfcb; transition: color .2s, text-decoration-color .2s; }
a.resource-item__title:hover { color: var(--blue); text-decoration-color: var(--blue); }
.resource-item__title span { display: inline-block; margin-left: 5px; font-size: 11px; }
.resource-item p { margin: 2px 0 0; color: var(--ink-soft); font-size: 12px; line-height: 1.45; }
.resource-item__book { display: flex; align-items: flex-end; gap: 16px; padding: 4px 0; }
.resource-item__cover-link { display: block; flex: 0 0 auto; }
.resource-item__cover { display: block; width: 112px; height: 158px; border: 1px solid var(--line); object-fit: contain; background: #fff; box-shadow: 0 5px 14px rgba(24, 42, 54, 0.11); transition: transform .2s, box-shadow .2s; }
.resource-item__cover-link:hover .resource-item__cover { transform: translateY(-2px); box-shadow: 0 8px 19px rgba(24, 42, 54, 0.16); }
.resource-item__book-link { padding-bottom: 3px; }
.resource-item__book-copy { max-width: 620px; padding-bottom: 3px; }
.resource-item__book-copy p { margin-top: 7px; }
.resource-item__papers,
.resource-item__links { display: grid; gap: 5px; margin: 8px 0 1px; padding: 0; list-style: none; }
.resource-item__papers li,
.resource-item__links li { display: flex; align-items: baseline; gap: 7px; font-size: 12px; line-height: 1.4; }
.resource-item__papers li::before,
.resource-item__links li::before { content: "↳"; color: var(--coral); font-family: var(--mono); font-size: 9px; }
.resource-item__papers a,
.resource-item__links a { color: var(--blue-dark); text-decoration-color: #9cbfcb; transition: color .2s, text-decoration-color .2s; }
.resource-item__papers a:hover,
.resource-item__links a:hover { color: var(--blue); text-decoration-color: var(--blue); }
.resource-item__papers a span,
.resource-item__links a span { display: inline-block; margin-left: 5px; font-size: 10px; }
.resource-feature { display: grid; grid-template-columns: minmax(180px, 280px) minmax(0, 1fr); gap: 18px; align-items: center; max-width: 780px; margin: 11px 0 13px; padding: 11px; border: 1px solid var(--line); color: var(--blue-dark); text-decoration: none; background: rgba(255, 255, 255, 0.55); transition: box-shadow .2s, transform .2s; }
.resource-feature:hover { transform: translateY(-2px); box-shadow: 0 8px 20px rgba(24, 42, 54, 0.12); }
.resource-feature img { display: block; width: 100%; aspect-ratio: 8 / 5; border: 1px solid var(--line); object-fit: cover; object-position: top; background: #fff; }
.resource-feature__copy { display: grid; gap: 7px; padding-right: 8px; }
.resource-feature__copy strong { font-size: 15px; line-height: 1.25; }
.resource-feature__copy strong i { margin-left: 4px; font-size: 10px; font-style: normal; }
.resource-feature__copy > span { color: var(--ink-soft); font-family: var(--serif); font-size: 13px; line-height: 1.45; }
.resource-item--gallery { padding-top: 20px; padding-bottom: 22px; }
.resource-gallery { min-width: 0; margin: 0; }
.resource-gallery__title { margin-bottom: 10px; }
.resource-gallery__grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 11px; }
.resource-gallery__card { min-width: 0; }
.resource-gallery__main-link { display: block; min-width: 0; color: var(--blue-dark); text-decoration: none; }
.resource-gallery__main-link img { display: block; width: 100%; aspect-ratio: 8 / 5; border: 1px solid var(--line); object-fit: cover; object-position: top; background: #fff; transition: transform .2s, box-shadow .2s; }
.resource-gallery__main-link:hover img { transform: translateY(-2px); box-shadow: 0 7px 17px rgba(24, 42, 54, 0.14); }
.resource-gallery__main-link > span { display: flex; gap: 7px; align-items: baseline; padding-top: 7px; font-size: 12px; font-weight: 700; }
.resource-gallery__main-link i { font-size: 10px; font-style: normal; }
.resource-gallery__extra-link { display: inline-block; margin-top: 4px; color: var(--blue-dark); font-family: var(--mono); font-size: 9px; text-decoration-color: #9cbfcb; }
.resource-gallery__extra-link:hover { color: var(--blue); text-decoration-color: var(--blue); }
.resource-gallery figcaption { max-width: 780px; margin-top: 16px; color: var(--ink-soft); font-size: 12px; line-height: 1.45; }
.chatbot-gallery { min-width: 0; margin: 0; }
.chatbot-gallery__grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 11px; }
.chatbot-card { min-width: 0; color: var(--blue-dark); text-decoration: none; }
.chatbot-card img { display: block; width: 100%; aspect-ratio: 8 / 5; border: 1px solid var(--line); object-fit: cover; object-position: top; background: #fff; transition: transform .2s, box-shadow .2s; }
.chatbot-card:hover img { transform: translateY(-2px); box-shadow: 0 7px 17px rgba(24, 42, 54, 0.14); }
.chatbot-card span { display: flex; gap: 7px; align-items: baseline; padding-top: 7px; font-size: 12px; font-weight: 700; }
.chatbot-card b { color: var(--blue); font-family: var(--mono); font-size: 8px; font-weight: 400; }
.chatbot-card i { font-size: 10px; font-style: normal; }
.chatbot-gallery figcaption { max-width: 780px; margin-top: 16px; color: var(--ink-soft); font-size: 12px; line-height: 1.45; }
.empty-state { margin: 25px 0; color: var(--ink-soft); font-family: var(--serif); font-size: 19px; }

.newsletter-band { background: var(--blue); color: white; }
.newsletter-band__grid { min-height: 303px; display: grid; grid-template-columns: 1.1fr 0.85fr auto; align-items: center; gap: 55px; }
.newsletter-band .eyebrow { color: #bde1ed; }
.newsletter-band h2 { max-width: 510px; }
.newsletter-band__grid > p { max-width: 320px; margin: 7px 0 0; color: #d8edf4; font-size: 14px; line-height: 1.6; }

.news { background: #fffefa; }
.section-heading--news { align-items: flex-end; }
.news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0; margin-top: 38px; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.post-card { min-height: 312px; display: flex; flex-direction: column; padding: 25px 28px 26px; border-right: 1px solid var(--line); }
.post-card:first-child { padding-left: 0; }
.post-card:last-child { border-right: 0; }
.post-card__meta { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-bottom: 46px; color: var(--blue); font-family: var(--mono); font-size: 9px; letter-spacing: 0.06em; text-transform: uppercase; }
.post-card h3 { margin: 0 0 11px; font-family: var(--condensed); font-size: 33px; font-weight: 400; letter-spacing: -0.025em; line-height: 0.98; }
.post-card p { margin-bottom: 22px; color: var(--ink-soft); font-size: 13px; line-height: 1.55; }
.post-card .text-link { margin-top: auto; }
.post-card--placeholder { background: #eef5f6; }
.post-card--placeholder .post-card__meta { color: var(--coral); }
.news-footer { display: flex; justify-content: space-between; padding-top: 22px; }
.news-footer p { margin: 0; color: var(--ink-soft); font-family: var(--mono); font-size: 9px; letter-spacing: 0.03em; }

.about { background: var(--paper-strong); }
.about-grid { display: grid; grid-template-columns: minmax(190px, 0.65fr) minmax(300px, 1.25fr); gap: 33px; }
.about-subtitle { margin: 10px 0; color: var(--blue); font-family: var(--serif); font-size: 21px; font-style: italic; }
.about-link { display: inline-flex; align-items: baseline; gap: 8px; margin-top: 9px; color: var(--blue-dark); font-size: 12px; font-weight: 700; text-decoration: none; }
.about-link span { display: inline-block; font-size: 14px; transition: transform 0.2s ease; }
.about-link:hover { color: var(--blue); text-decoration: underline; }
.about-link:hover span { transform: translate(2px, -2px); }
.about-copy { max-width: 580px; padding-top: 8px; }
.about-copy p { color: var(--ink-soft); font-family: var(--serif); font-size: 18px; line-height: 1.47; }
.about-copy p:last-child { margin-bottom: 0; }
.author-profile { display: grid; grid-template-columns: 150px minmax(0, 580px); gap: 30px; align-items: center; margin-top: 52px; padding-top: 36px; border-top: 1px solid var(--line); }
.author-profile__portrait { display: block; width: 150px; aspect-ratio: 1; border-radius: 50%; object-fit: cover; box-shadow: 0 8px 24px rgba(24, 42, 54, 0.12); }
.author-profile__copy .eyebrow { margin-bottom: 8px; }
.author-profile__copy h3 { margin: 0 0 10px; font-family: var(--condensed); font-size: 32px; font-weight: 500; letter-spacing: -0.02em; line-height: 1; }
.author-profile__copy > p:last-child { margin: 0; color: var(--ink-soft); font-family: var(--serif); font-size: 17px; line-height: 1.5; }

.site-footer { background: var(--ink); color: white; }
.footer-inner { min-height: 80px; display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.footer-inner p { margin: 0; font-family: var(--mono); font-size: 9px; letter-spacing: 0.06em; text-transform: uppercase; }
.footer-inner p:first-child { font-family: var(--sans); font-size: 14px; font-weight: 600; letter-spacing: -0.03em; text-transform: none; }
.footer-inner p:first-child span { padding: 0 4px; color: #a8c8d7; }

.close-button { width: 32px; height: 32px; border: 1px solid var(--line); border-radius: 50%; background: transparent; color: var(--ink); font-size: 25px; line-height: 1; }
.close-button:hover { background: var(--ink); color: white; }
.post-reader { width: min(700px, calc(100% - 32px)); max-height: min(790px, calc(100% - 32px)); border: 0; padding: 0; background: transparent; color: var(--ink); }
.post-reader::backdrop { background: rgba(8, 30, 48, 0.68); backdrop-filter: blur(4px); }
.post-reader__card { margin: 0; padding: 39px 42px 45px; overflow: auto; background: #fffefa; box-shadow: 14px 16px 0 var(--blue); }
.post-reader__header { display: flex; align-items: flex-start; justify-content: space-between; gap: 20px; margin-bottom: 32px; }
.post-reader__header .eyebrow { margin: 9px 0 0; }
.post-reader h2 { max-width: 570px; margin-bottom: 27px; font-size: clamp(39px, 5vw, 55px); }
.post-reader__body { max-width: 590px; color: var(--ink-soft); font-family: var(--serif); font-size: 20px; line-height: 1.5; }
.post-reader__body p:last-child { margin-bottom: 0; }
.post-reader__body h3, .post-reader__body h4 { margin: 1.4em 0 .45em; color: var(--ink); font-family: var(--condensed); font-weight: 500; line-height: 1.05; }
.post-reader__body h3 { font-size: 31px; }
.post-reader__body h4 { font-size: 25px; }
.post-reader__body ul { padding-left: 1.2em; }
.post-reader__body li { margin-bottom: .35em; }
.post-reader__body a { color: var(--blue-dark); }
.post-figure { margin: 30px 0; }
.post-figure img { display: block; width: 100%; height: auto; background: var(--paper-strong); }
.post-figure figcaption { margin-top: 8px; color: #657070; font-family: var(--sans); font-size: 11px; line-height: 1.45; }

@media (max-width: 850px) {
  .header-inner { min-height: 72px; }
  nav { gap: 15px; }
  .hero-grid { min-height: auto; grid-template-columns: 1fr 280px; gap: 24px; }
  .hero-copy { padding: 73px 0 58px; }
  .book-panel { width: 300px; height: 470px; padding: 0; }
  .book-image { top: -122px; width: 750px; }
  .resource-chapter { grid-template-columns: 150px minmax(0, 1fr); gap: 25px; }
  .newsletter-band__grid { grid-template-columns: 1fr 1fr; gap: 28px; padding: 52px 0; }
  .newsletter-band__grid .button { grid-column: 1 / -1; justify-self: start; }
  .about-grid { grid-template-columns: 1fr 1.25fr; gap: 25px; }
}

@media (max-width: 640px) {
  .shell { width: min(100% - 34px, 1180px); }
  .site-header { position: relative; }
  .header-inner { min-height: 65px; }
  .wordmark { min-width: 0; }
  .wordmark span { font-size: 22px; }
  nav { display: none; }
  .hero-grid { display: block; }
  .hero-copy { padding: 54px 0 35px; }
  h1 { font-size: clamp(49px, 15vw, 67px); }
  .hero-intro { font-size: 18px; }
  .hero-stats { margin-top: 43px; gap: 24px; }
  .book-panel { width: 275px; height: 452px; margin: 0 auto; padding: 0; }
  .book-image { top: -116px; width: 720px; }
  .book-panel__rings { top: 81px; right: -120px; transform: scale(0.78); }
  .book-note { bottom: 22px; right: -7px; }
  .intro-band__grid { min-height: 0; grid-template-columns: 1fr auto; gap: 15px; padding: 32px 0; }
  .intro-band__grid > p { font-size: 19px; }
  .section { padding: 72px 0; }
  .section-heading { align-items: flex-start; flex-direction: column; gap: 17px; padding-bottom: 23px; }
  h2 { font-size: 42px; }
  .resource-controls { align-items: stretch; flex-direction: column; padding: 20px 0; }
  .search-field { width: 100%; }
  .resource-chapter { display: block; padding: 27px 0 34px; }
  .chapter-index { margin-bottom: 23px; }
  .resource-content__intro { font-size: 18px; }
  .resource-item { grid-template-columns: 33px minmax(0, 1fr); gap: 9px; padding: 13px 0; }
  .resource-feature { grid-template-columns: 1fr; gap: 10px; }
  .resource-feature__copy { padding: 0 2px 3px; }
  .chatbot-gallery__grid,
  .resource-gallery__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .newsletter-band__grid { display: block; padding: 57px 0; }
  .newsletter-band h2 { margin-bottom: 18px; }
  .newsletter-band__grid > p { margin-bottom: 27px; }
  .news-grid { display: block; margin-top: 27px; }
  .post-card { min-height: 0; padding: 24px 0; border-right: 0; border-bottom: 1px solid var(--line); }
  .post-card:first-child { padding-left: 0; }
  .post-card:last-child { border-bottom: 0; }
  .post-card__meta { margin-bottom: 31px; }
  .news-footer { align-items: flex-start; flex-direction: column; gap: 13px; }
  .about-grid { display: block; }
  .about-copy { padding-top: 17px; }
  .about-copy p { font-size: 17px; }
  .author-profile { grid-template-columns: 105px minmax(0, 1fr); gap: 20px; margin-top: 36px; padding-top: 30px; }
  .author-profile__portrait { width: 105px; }
  .author-profile__copy h3 { font-size: 28px; }
  .author-profile__copy > p:last-child { font-size: 16px; }
  .footer-inner { min-height: 90px; align-items: flex-start; flex-direction: column; justify-content: center; gap: 8px; }
  .post-reader__card { padding: 27px 22px 32px; }
  .post-reader__body { font-size: 18px; }
}