/* Editorial refresh: one visual hierarchy across guides, hubs and utilities. */
:root { --container: 1200px; --sg-secondary: #dceef9; --sg-secondary-hover: #c2dfef; --sg-ai-strong: #176182; --sg-link: #176182; --sg-muted: #566578; --radius-md: .65rem; --radius-lg: .9rem; }
body { background: #fff; }
h1,h2,h3,h4 { text-wrap: balance; letter-spacing: -.025em; }
h1 { font-size: clamp(2.2rem,4.5vw,3.75rem); line-height: 1.08; }
h2 { font-size: clamp(1.65rem,2.6vw,2rem); line-height: 1.2; }
h3 { line-height: 1.3; }
.main-content { padding-block: 2.5rem 4rem; background: #fff; }
.site-header { background: transparent; backdrop-filter: none; -webkit-backdrop-filter: none; isolation: isolate; }
.site-header::before { content: ''; position: absolute; inset: 0; z-index: -1; pointer-events: none; background: #fafbfc; box-shadow: inset 0 1px 0 #ffffffb3, 0 4px 20px #191b2005; }
@supports ((backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px))) {
 .site-header::before { background: rgba(255,255,255,.76); backdrop-filter: blur(22px) saturate(145%); -webkit-backdrop-filter: blur(22px) saturate(145%); }
}
@media (prefers-reduced-transparency: reduce) { .site-header::before { background: #fff; backdrop-filter: none; -webkit-backdrop-filter: none; } }
.site-header-inner { min-height: 68px; gap: 1.25rem; }
.site-brand { font-size: 1.25rem; }
.site-brand-mark { border: 0; box-shadow: none; }
.site-logo { display: block; width: 180px; max-width: 100%; }
.site-logo img { display: block; width: 100%; height: auto; }
@media (max-width: 700px) { .site-header .site-logo { width: 145px; } }
@media (max-width: 359px) { .site-header .site-logo { width: 32px; } }
.primary-nav > ul { gap: clamp(.75rem,1.6vw,1.4rem); }
.primary-nav a { font-size: .82rem; font-weight: 550; color: #292d36; }
.primary-nav a[aria-current=page] { color: var(--sg-link); }
.primary-nav a[aria-current=page]::after { transform: scaleX(1); }
.header-search { display: flex; flex: 0 0 170px; align-items: center; margin: 0; border: 1px solid #c8ccd5; border-radius: .5rem; background: #ffffff8f; }
.header-search:focus-within { border-color: #254cc7; box-shadow: 0 0 0 2px #254cc726; }
.header-search input { width: 100%; min-width: 0; min-height: 42px; padding: .5rem 0 .5rem .7rem; color: #191b20; border: 0; background: transparent; border-radius: .5rem; font-size: .85rem; }
.header-search input::placeholder { color: #596171; opacity: 1; }
.header-search button { display: grid; place-items: center; flex: 0 0 42px; min-height: 42px; padding: 0; border: 0; border-radius: .4rem; color: #254cc7; background: transparent; cursor: pointer; }
.header-search button:hover { color: #fff; background: #183697; }
@media (max-width: 1279px) {
 .primary-nav { display: none; }
 .site-header .mobile-menu-toggle { display: inline-flex; align-items: center; justify-content: center; }
 .site-header .mobile-nav { position: fixed; inset: 0; z-index: 90; padding: 6rem var(--gutter) 2rem; overflow-y: auto; background: #fff; }
 .site-header .mobile-nav:not([hidden]) { display: block; }
 .site-header .mobile-nav ul { display: grid; gap: .5rem; }
 .site-header .mobile-nav a { min-height: 3rem; padding: .5rem; border-bottom: 1px solid var(--line); }
 .site-header .mobile-nav__close { position: absolute; top: 1rem; right: var(--gutter); width: 44px; height: 44px; color: var(--sg-primary); background: #fff; border: 1px solid var(--line); border-radius: .5rem; }
}
@media (max-width: 700px) {
 .site-header-inner { gap: .5rem; }
 .header-search { flex-basis: 125px; }
 .site-header .site-brand { font-size: 1rem; }
}
@media (max-width: 359px) { .site-header .site-brand > span:last-child { display: none; } }
.button { gap: .8rem; color: #fff; background: #16394b; border-color: #16394b; box-shadow: none; font-weight: 600; border-radius: .4rem; padding: .75rem 1.2rem; }
.button:hover { color: #fff; background: #24566c; border-color: #24566c; transform: none; }
.button--secondary { color: var(--sg-heading); background: #fff; border-color: var(--line); }
.button--secondary:hover { color: var(--sg-heading); background: var(--surface); border-color: var(--line); }
.eyebrow,.hero__eyebrow { color: #476575; font-weight: 650; font-size: .72rem; letter-spacing: .12em; }
.section { padding-block: 2.8rem; }
.section-heading h2 { margin-bottom: 0; }
.section-heading > a { font-size: .9rem; font-weight: 600; }
.card,.topic-tool-card,.topic-learning-card { box-shadow: none; background: #fff; border-color: var(--line); }
.card:hover,.topic-tool-card:hover { transform: none; box-shadow: none; border-color: #8babb9; }
.card--research::after,.card--intelligence::after,.topic-learning-card::after,.article-header--research::after { display: none; }
.card--research,.card--intelligence { background: #fff; border-color: var(--line); }
.card__label,.badge,.article-type-badge { color: #476575; background: transparent; border: 0; padding: 0; font-weight: 650; letter-spacing: .08em; border-radius: 0; }
.card h3 { font-size: 1.25rem; }
.card p { font-size: .95rem; line-height: 1.65; }
.card .card__label { font-size: .7rem; }
.editorial-home { padding-top: 0; }
.editorial-hero { display: grid; grid-template-columns: 1.1fr .9fr; gap: 5rem; align-items: center; padding: 4.5rem 0; border-bottom: 1px solid var(--line); }
.editorial-hero h1 { max-width: 16ch; margin-bottom: 1.25rem; }
.editorial-hero .dek { max-width: 43ch; font-size: 1.08rem; }
.editorial-hero .hero__actions { align-items: center; gap: 1.5rem; }
.editorial-text-link { font-size: .93rem; font-weight: 600; }
.editorial-hero__image { margin: 0; }
.editorial-hero__image img { aspect-ratio: 8/5; width: 100%; object-fit: cover; border-radius: .6rem; }
.editorial-hero__image figcaption { margin-top: .8rem; color: var(--sg-muted); font-size: .8rem; }
.editorial-feature-grid { display: grid; grid-template-columns: 1.25fr 1fr; gap: 0 2rem; }
.editorial-feature-grid .card { border: 0; border-radius: 0; padding: 1.25rem 0; }
.editorial-feature-grid .card:first-child { grid-row: span 2; padding: 2rem; background: #edf3f5; border-radius: .6rem; }
.editorial-feature-grid .card:first-child h3 { max-width: 25ch; font-size: clamp(1.55rem,2.5vw,2rem); }
.editorial-feature-grid .card + .card + .card { border-top: 1px solid var(--line); }
.editorial-feature-grid .card:first-child p { max-width: 48ch; }
.editorial-topic-grid { display: grid; grid-template-columns: repeat(5,minmax(0,1fr)); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.editorial-topic-grid > a { padding: 1.5rem 1rem; text-decoration: none; color: var(--sg-heading); }
.editorial-topic-grid > a + a { border-left: 1px solid var(--line); }
.editorial-topic-grid > a:hover { background: #f3f7f8; }
.editorial-topic-heading { display: flex; justify-content: space-between; gap: .5rem; margin-bottom: .7rem; font-size: 1rem; font-weight: 650; }
.editorial-topic-grid > a > span:last-child { display: block; font-size: .87rem; line-height: 1.55; color: var(--sg-muted); }
.editorial-tools .topic-tool-card { padding: 1.8rem; }
.topic-tool-card h3 { max-width: 30ch; }
.editorial-news .topic-news-list a { padding-block: 1.4rem; }
.editorial-standard { display: grid; grid-template-columns: 1fr 2fr; gap: 3rem; border-top: 1px solid var(--line); margin-top: 2rem; padding-top: 3rem; }
.editorial-standard p { max-width: 60ch; }
.editorial-standard a { font-size: .95rem; }
.editorial-hub .topic-hub-hero { padding: 2rem 0 1rem; }
.editorial-hub-content { max-width: 960px; }
.editorial-hub .topic-learning-card { padding: 2rem; background: #f1f5f6; }
.editorial-hub .topic-learning-card h3 { max-width: 32ch; font-size: 1.85rem; }
.editorial-hub .section + .section { border-top: 1px solid var(--line); }
.editorial-topic-links { display: flex; flex-wrap: wrap; align-items: center; gap: 1rem 2rem; padding: 2rem 0; border-top: 1px solid var(--line); }
.editorial-topic-links p { width: 100%; margin: 0; }
.editorial-topic-links a { font-size: .95rem; }
.topic-tool-grid { grid-template-columns: repeat(auto-fit,minmax(min(100%,320px),1fr)); }
.article-layout { grid-template-columns: minmax(0,760px) minmax(180px,240px); gap: 4.5rem; }
.article-header--research { padding: .5rem 0 1.5rem; background: transparent; border: 0; border-bottom: 1px solid var(--line); border-radius: 0; }
.article-header h1 { max-width: 25ch; font-size: clamp(2.1rem,3.5vw,3rem); }
.article-header__identity > .eyebrow { display: none; }
.article-header__meta { border: 0; padding: 0; font-size: .8rem; gap: .5rem 1rem; }
.article-header__meta > span:first-child { display: none; }
.article-sidebar { top: 100px; }
.article-sidebar .toc { padding: 0 0 0 1.25rem; background: none; border: 0; border-left: 1px solid var(--line); border-radius: 0; font-size: .85rem; }
.article-sidebar .toc ol { padding-left: 1rem; }
.article-mobile-toc { display: none; }
.prose { padding-top: 1rem; }
.prose h2 { margin-top: 2.75rem; font-size: 1.75rem; }
.prose h3 { margin-top: 2rem; }
.prose .callout--evidence { padding: 1.25rem; margin-top: 2rem; font-size: .9rem; }
.quick-answer { padding: 1.2rem; background: #f1f5f6; border: 0; border-left: 3px solid #6d99ab; border-radius: .3rem; }
.author-box { background: none; border: 0; border-top: 1px solid var(--line); padding: 1.5rem 0; }
.author-box h2 { font-size: 1rem; }
.author-box p { font-size: .9rem; }
.editorial-tool-page .article-layout { display: block; }
.editorial-tool-page .article-main { max-width: none; }
.editorial-tool-page .article-header { max-width: 880px; margin-bottom: 1.5rem; }
.editorial-tool-page .article-header h1 { max-width: 30ch; }
.editorial-tool-page .tool-product__intro { display: block; }
.editorial-tool-page .tool-product__intro .eyebrow,.editorial-tool-page .tool-product__intro p { display: none; }
.editorial-tool-page .tool-product__intro h2 { margin: 0; font-size: 1.2rem; }
.editorial-tool-page .robots-tool__header,.editorial-tool-page .schema-tool__header { display: none; }
.editorial-tool-page .robots-tool textarea[data-raw-output] { min-height: 14rem; height: 14rem; }
.editorial-tool-page .robots-tool textarea[data-validator-input] { min-height: 10rem; }
.editorial-tool-page .tool-product > [data-robots-tool],.editorial-tool-page .tool-product > [data-jsonld-generator] { max-width: none; }
/* Reserve the initial utility workspace before its browser-only module mounts.
 * Both initial desktop forms are at least 85rem tall. This is a minimum, not a
 * fixed height: added groups, validation messages and narrow layouts can grow.
 * Keep references and explanatory text from flashing above the loading form. */
.editorial-tool-page .tool-workspace { min-block-size: 85rem; }
.editorial-tool-page .tool-loading { color: var(--sg-muted); padding-block: 1rem; }
.editorial-tool-page .tool-explainer { margin-top: 2.5rem; }
.editorial-tool-page .prose { max-width: 760px; }
.editorial-tool-page .tool-product__sources { padding-top: 1rem; font-size: .9rem; }
.site-footer { background: #f3f6f7; border-top: 1px solid var(--line); color: var(--sg-body); padding-block: 3rem 1.5rem; }
.site-footer::before,.site-footer::after { display: none; }
.site-footer h2 { color: var(--sg-heading); font-size: .9rem; }
.site-footer a,.site-footer .site-brand { color: var(--sg-heading); }
.site-footer .site-brand-mark { color: #fff; background: var(--sg-primary); }
.site-footer__kicker { display: none; }
.site-footer__tagline { margin-top: 1.25rem; margin-bottom: .5rem; color: var(--sg-ink, #191b20); font-size: .95rem; font-weight: 600; line-height: 1.5; }
.brand-page__header { max-width: 760px; padding-block: 2rem 1.5rem; border-bottom: 1px solid var(--line); }
.brand-page__header h1 { margin-bottom: .5rem; }
.brand-page__body { max-width: 68ch; padding-top: 1.5rem; }
.brand-page__body .brand-lead { color: #191b20; font-size: clamp(1.3rem, 2vw, 1.65rem); line-height: 1.4; font-weight: 550; }
.brand-page__body p, .brand-page__body li { overflow-wrap: anywhere; }
.site-footer .footer-note { color: var(--sg-muted); max-width: 26ch; }
.site-footer-inner--preferences { margin-top: 2rem; padding-top: 1rem; }
.site-footer-inner--preferences .footer-note { display: none; }
.project-consent { padding: .85rem 1rem; box-shadow: 0 -3px 20px #1021320a; }
.project-consent__inner { width: min(100%,1200px); gap: 1rem; align-items: center; }
.project-consent__eyebrow { display: none; }
.project-consent h2 { font-size: 1rem; margin-bottom: .25rem; }
.project-consent p { font-size: .84rem; line-height: 1.5; margin: 0; max-width: 60ch; }
.project-consent button { font-size: .83rem; padding: .5rem .8rem; box-shadow: none; }
.project-consent button[data-project-consent-accept],.project-consent button[data-project-consent-reject] { color: var(--sg-heading); background: #fff; border-color: #9daeba; }
.project-consent button[data-project-consent-accept]:hover,.project-consent button[data-project-consent-reject]:hover { background: #edf3f5 !important; }
.project-consent-preferences { color: var(--sg-link); font-size: .85rem; }
@media(max-width: 1024px) {
 .editorial-hero { gap: 2rem; padding-block: 3rem; }
 .editorial-topic-grid { grid-template-columns: repeat(3,minmax(0,1fr)); }
 .editorial-topic-grid > a { border-bottom: 1px solid var(--line); }
 .article-layout { grid-template-columns: minmax(0,1fr); }
 .article-sidebar > .toc { display: none; }
 .article-mobile-toc { display: block; border-block: 1px solid var(--line); padding: .8rem 0; margin-bottom: 1.5rem; }
 .article-mobile-toc summary { cursor: pointer; font-size: .95rem; font-weight: 600; min-height: 28px; }
 .article-mobile-toc .toc { border: 0; background: none; padding: 1rem 0; }
}
/* September palette refinement. Structure and canonical content are unchanged.
 * Pale surface tokens must never be used as interactive text colors. */
:root {
 --sg-primary: #191b20; --sg-heading: #191b20; --sg-body: #505663;
 --sg-muted: #5a606b; --sg-border: #d4d6dc; --sg-surface: #f2f3f5;
 --sg-secondary: #dce4ff; --sg-secondary-hover: #c4d2ff;
 --sg-link: #254cc7; --sg-ai-strong: #183697; --sg-ai: #254cc7;
 --sg-surface-cyan: #edf1ff; --radius-md: .35rem; --radius-lg: .5rem;
}
.site-header { border-bottom-color: rgba(25,27,32,.1); }
.site-brand-mark { border-radius: .25rem; background: #254cc7; }
.site-brand { letter-spacing: -.045em; }
.editorial-hero h1 { font-family: Georgia, 'Times New Roman', serif; font-weight: 400; letter-spacing: -.055em; font-size: clamp(2.8rem,4.7vw,4.25rem); line-height: 1.04; }
.editorial-hero__image img { border-radius: .25rem; filter: saturate(.45); }
.eyebrow,.hero__eyebrow,.card__label,.badge,.article-type-badge { color: #454d61; }
.editorial-hero .hero__eyebrow { color: #254cc7; }
.section-heading h2,.editorial-standard h2 { font-weight: 600; letter-spacing: -.04em; }
.button { background: #254cc7; border-color: #254cc7; border-radius: .25rem; }
.button:hover,.button:focus-visible { color: #fff; background: #183697; border-color: #183697; box-shadow: 0 4px 0 #101e54; }
.button--secondary { color: #254cc7; background: #fff; border-color: #254cc7; }
.button:active { transform: translateY(1px); box-shadow: none; }
a,button,summary,.card,.topic-tool-card { transition: color 180ms ease, background-color 180ms ease, border-color 180ms ease, box-shadow 180ms ease; }
a:focus-visible,button:focus-visible,summary:focus-visible { outline: 3px solid #254cc7; outline-offset: 4px; }
.card h3 a:hover,.card h3 a:focus-visible,
.topic-tool-card h3 a:hover,.topic-learning-card h3 a:hover,
.topic-article-list__item h3 a:hover,.topic-content-card__body h3 a:hover,
.site-footer a:hover,.site-footer a:focus-visible { color: #183697; text-decoration: underline; text-decoration-thickness: 2px; text-underline-offset: .2em; }
.editorial-text-link:hover,.section-heading > a:hover,.editorial-standard a:hover { color: #183697; text-decoration: underline; text-decoration-thickness: 2px; text-underline-offset: .3em; }
.primary-nav a:hover { color: #183697; }
.primary-nav a::after { background: #254cc7; }
.header-action:not(.header-action--accent):hover,.mobile-menu-toggle:hover { color: #fff; background: #254cc7; border-color: #254cc7; }
.editorial-feature-grid .card:first-child { background: #fff; border-radius: .25rem; border: 1px solid #d4d6dc; border-top: 3px solid #254cc7; }
.editorial-feature-grid .card:first-child:hover,.editorial-feature-grid .card:first-child:focus-within { background: #fff; border-color: #254cc7; }
.editorial-feature-grid .card:first-child h3 { font-weight: 600; letter-spacing: -.035em; }
.editorial-feature-grid .card:not(:first-child):hover { background: #fff; }
.editorial-topic-grid > a:hover,.editorial-topic-grid > a:focus-visible { color: #fff; background: #254cc7; }
.editorial-topic-grid > a:hover > span:last-child,.editorial-topic-grid > a:focus-visible > span:last-child { color: #fff; }
.editorial-topic-grid > a { border-radius: 0; }
.editorial-tools .topic-tool-card { border-radius: .25rem; border: 1px solid #d4d6dc; background: #fff; }
.editorial-tools .topic-tool-card:hover,.editorial-tools .topic-tool-card:focus-within { border-color: #254cc7; background: #fff; box-shadow: none; }
.topic-tool-card__action { color: #254cc7; }
.topic-tool-card__action:hover { color: #183697; text-decoration: underline; text-underline-offset: .2em; }
.topic-news-list a:hover { color: #183697; background: #edf1ff; }
.editorial-hub .topic-learning-card,.quick-answer { background: #fff; border-left-color: #254cc7; }
.site-footer { background: #fff; }
.site-footer .site-brand-mark { background: #254cc7; color: #fff; }
.project-consent button[data-project-consent-accept]:hover,
.project-consent button[data-project-consent-reject]:hover,
.project-consent .project-consent__manage:hover { color: #fff !important; background: #183697 !important; border-color: #183697 !important; }
.project-consent-preferences:hover { color: #183697; text-decoration-thickness: 2px; }
@media(max-width:700px) { .editorial-hero h1 { font-size: 3rem; } .editorial-topic-grid > a { padding-inline: .75rem; } }
@media(prefers-reduced-motion:reduce) { a,button,summary,.card,.topic-tool-card { transition: none; } }
@media(max-width: 700px) {
 .main-content { padding-top: 1.5rem; }
 .site-header-inner { min-height: 68px; }
 .editorial-home { padding-top: 0; }
 .editorial-hero { grid-template-columns: 1fr; padding: 2.5rem 0 2rem; gap: 1.5rem; }
 .editorial-hero h1 { font-size: 2.6rem; max-width: 16ch; }
 .editorial-hero .dek { font-size: 1rem; }
 .editorial-hero__image img { aspect-ratio: 2.4/1; }
 .editorial-hero__image figcaption { display: none; }
 .section { padding-block: 2rem; }
 .section-heading { align-items: start; gap: 1rem; }
 .section-heading > a { font-size: .82rem; }
 .editorial-feature-grid { grid-template-columns: 1fr; gap: .5rem; }
 .editorial-feature-grid .card:first-child { grid-row: auto; padding: 1.5rem; }
 .editorial-topic-grid { grid-template-columns: 1fr; }
 .editorial-topic-grid > a { border-left: 0 !important; padding: 1rem 0; }
 .editorial-topic-heading { margin-bottom: .3rem; }
 .editorial-standard { grid-template-columns: 1fr; gap: 1rem; padding-top: 2rem; }
 .editorial-hub .topic-learning-card { padding: 1.5rem; }
 .editorial-hub .topic-learning-card h3 { font-size: 1.5rem; }
 .article-header h1 { font-size: 2.15rem; }
 .project-consent__inner { grid-template-columns: 1fr; gap: .65rem; }
 .project-consent__actions { display: grid; grid-template-columns: 1fr 1fr; gap: .4rem; }
 .project-consent__actions .project-consent__manage { grid-column: 1 / -1; min-height: 32px; padding: .2rem; border: 0 !important; text-decoration: underline; }
 .site-footer-inner { gap: 1.5rem; }
 .site-footer-inner:not(.site-footer-inner--preferences) { grid-template-columns: 1fr 1fr; }
 .site-footer__identity,.site-footer-inner:not(.site-footer-inner--preferences) > div:last-child { grid-column: 1 / -1; }
 .site-footer-inner:not(.site-footer-inner--preferences) > div:last-child ul { display: grid; grid-template-columns: 1fr 1fr; gap: .4rem 1rem; }
}

/* Selected concept 3: centered editorial copy above a single path of light. */
.editorial-hero--glint { display: flex; flex-direction: column; gap: 0; padding: 4.25rem 0 0; overflow: hidden; }
.editorial-hero--glint .editorial-hero__copy { position: relative; z-index: 1; width: 100%; text-align: center; }
.editorial-hero--glint .eyebrow { margin-bottom: 1.4rem; }
.editorial-hero--glint h1 { max-width: none; margin: 0 auto 1.4rem; font-size: clamp(3.3rem, 5vw, 4.65rem); line-height: 1.04; letter-spacing: -.05em; }
.editorial-hero--glint .dek { max-width: 61ch; margin: 0 auto; font-size: 1.05rem; line-height: 1.75; }
.editorial-hero--glint .hero__actions { justify-content: center; margin-top: 1.6rem; gap: 1.6rem; }
.editorial-hero--glint .editorial-hero__image { width: 100%; margin: -1rem 0 0; pointer-events: none; }
.editorial-hero--glint .editorial-hero__image img { display: block; width: 100%; height: auto; aspect-ratio: 1600 / 533; object-fit: contain; border-radius: 0; filter: none; }
@media (max-width: 700px) {
 .editorial-hero--glint { padding-top: 2.6rem; }
 .editorial-hero--glint .eyebrow { margin-bottom: 1.2rem; font-size: .64rem; }
 .editorial-hero--glint h1 { font-size: clamp(2.25rem, 9.2vw, 3.3rem); }
 .editorial-hero--glint .dek { max-width: 38ch; font-size: .98rem; }
 .editorial-hero--glint .hero__actions { gap: 1rem; flex-wrap: wrap; }
 .editorial-hero--glint .editorial-hero__image { width: 700px; max-width: none; align-self: flex-end; margin-top: -.5rem; }
}