@font-face {
  font-family: Manrope;
  src: url('/assets/fonts/manrope-variable.ttf') format('truetype');
  font-weight: 200 800;
  font-display: swap;
}
:root {
  --ink: #22202f;
  --muted: #666374;
  --night: #171424;
  --violet: #6844d9;
  --pale: #f7f5fc;
  --line: #e5e1ee;
  --radius: 20px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 32px; }
body { margin: 0; font: 17px/1.7 Manrope, sans-serif; color: var(--ink); background: #fff; }
button, input { font: inherit; }
button, a, input, summary { -webkit-tap-highlight-color: transparent; }
a { color: inherit; text-decoration-thickness: 1px; text-underline-offset: 4px; }
a:hover { text-decoration-color: currentColor; }
button, summary { cursor: pointer; }
button { color: inherit; }
img, svg { display: block; max-width: 100%; }
svg { width: 48px; height: 48px; flex-shrink: 0; }
p { margin: 0 0 22px; }
h1, h2, h3 { margin: 0; line-height: 1.16; letter-spacing: -.045em; }
h1 { font-weight: 600; }
h2 { font-size: clamp(34px, 3.6vw, 51px); font-weight: 600; }
h3 { font-size: 24px; font-weight: 650; }
:focus-visible { outline: 3px solid #c386ff; outline-offset: 5px; border-radius: 4px; }
[hidden] { display: none !important; }
.wrap { width: min(1180px, calc(100% - 80px)); margin-inline: auto; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }
.skip { position: fixed; z-index: 50; top: -100px; left: 20px; background: #fff; color: var(--ink); padding: 12px 20px; border-radius: 8px; }
.skip:focus { top: 15px; }
.site-header { color: #fff; background: #171424; }
.header-row { display: flex; align-items: center; justify-content: space-between; min-height: 100px; gap: 35px; }
.brand { display: inline-flex; align-items: center; gap: 12px; text-decoration: none; font-size: 23px; font-weight: 750; letter-spacing: -.055em; white-space: nowrap; }
.brand img { width: 43px; height: 43px; }
.brand-light { font-weight: 400; }
.brand-ca { font-size: 17px; font-weight: 500; letter-spacing: -.03em; }
#navigation { display: flex; align-items: center; gap: 29px; font-size: 15px; }
#navigation a { text-decoration: none; }
#navigation a:not(.nav-cta):hover, #navigation [aria-current] { color: #c9b5ff; }
.nav-cta { padding: 12px 19px; border: 1px solid #5b506e; border-radius: 9px; display: flex; gap: 12px; }
.nav-cta:hover { background: #2b2441; }
.menu-toggle { display: none; }
.hero { padding: 76px 0 0; background: radial-gradient(ellipse at 80% 20%, #352565 0%, transparent 55%), linear-gradient(115deg, #16151b, #1d1833 70%, #201735); color: white; }
.hero > .wrap { width: min(1180px, calc(100% - 80px)); }
.eyebrow { font-size: 15px; font-weight: 700; letter-spacing: .105em; text-transform: uppercase; color: var(--violet); margin-bottom: 19px; }
.hero-eyebrow { color: #c8b4f9; text-align: center; display: flex; align-items: center; justify-content: center; gap: 10px; }
.hero-eyebrow > span { width: 7px; height: 7px; border-radius: 50%; background: #bd92ff; box-shadow: 0 0 16px #b779f2; }
.hero h1 { font-size: clamp(44px, 5.5vw, 77px); text-align: center; line-height: 1.13; letter-spacing: -.055em; max-width: 1080px; margin: 0 auto 25px; }
.gradient-text { color: #ba9bff; background: linear-gradient(95deg, #a08cff 5%, #dc8bff 92%); background-clip: text; -webkit-text-fill-color: transparent; }
.hero-dek { text-align: center; color: #d2cddd; font-size: 21px; line-height: 1.6; margin: 0 auto 35px; }
.actions { display: flex; justify-content: center; flex-wrap: wrap; gap: 15px; }
.button { display: inline-flex; justify-content: center; align-items: center; gap: 22px; min-height: 56px; padding: 13px 25px; border-radius: 100px; text-decoration: none; font-size: 16px; font-weight: 700; line-height: 1.5; text-align: center; transition: transform .2s, box-shadow .2s; }
.button:hover { transform: translateY(-2px); box-shadow: 0 7px 22px #34155920; }
.button.primary { background: linear-gradient(100deg, #6944de, #8550e8); color: #fff; }
.button.light { background: #fff; color: #282134; }
.button > span { font-size: 21px; }
.topic-pills { display: flex; justify-content: center; flex-wrap: wrap; gap: 10px; margin: 31px auto 55px; }
.topic-pills a { border: 1px solid #51465f; border-radius: 100px; padding: 7px 15px; text-decoration: none; color: #e0d8ec; font-size: 15px; }
.topic-pills a::before { content: '✓'; color: #b190ff; margin-right: 9px; }
.topic-pills a:hover { border-color: #b190ff; background: #3c2c56; }
.system-map { background: #fff; color: var(--ink); border: 1px solid #6d5887; border-radius: 22px 22px 0 0; box-shadow: 0 -10px 80px #a05aff16; overflow: hidden; }
.map-bar { display: flex; align-items: center; gap: 10px; padding: 19px 27px; font-size: 15px; border-bottom: 1px solid var(--line); background: #fbfaff; font-weight: 650; }
.map-dot { width: 9px; height: 9px; background: #8157e9; border-radius: 50%; }
.map-caption { margin-left: auto; color: var(--muted); font-weight: 400; }
.map-body { padding: 30px 40px 33px; background-image: radial-gradient(#cfc4e7 1px, transparent 1px); background-size: 21px 21px; }
.map-centre { display: flex; align-items: center; gap: 17px; max-width: 510px; margin: 0 auto; background: #211a35; color: #fff; padding: 18px 24px; border-radius: 13px; text-decoration: none; box-shadow: 0 6px 15px #22193512; position: relative; }
.map-centre::after { content: ''; width: 1px; height: 22px; background: #b39bcf; position: absolute; bottom: -23px; left: 50%; }
.map-icon { color: #bf9cff; }
.map-centre strong { font-size: 20px; display: block; margin-bottom: 2px; letter-spacing: -.025em; }
.map-centre span span { display: block; color: #c5bcd6; font-size: 15px; }
.map-centre > span:last-child { margin-left: auto; }
.map-branches { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; position: relative; padding-top: 43px; }
.map-branches::before { content: ''; height: 22px; position: absolute; top: 22px; left: 16.4%; right: 16.4%; border: 1px solid #b39bcf; border-bottom: 0; border-radius: 10px 10px 0 0; }
.map-branches > a { display: grid; grid-template-columns: 1fr auto; position: relative; padding: 21px 23px; border: 1px solid #ddd3eb; border-radius: 12px; text-decoration: none; background: #fff; box-shadow: 0 4px 15px #23153307; }
.map-branches > a:hover { border-color: #8c66d4; }
.node-icon { color: #7950bf; grid-column: 1 / -1; margin-bottom: 9px; }
.node-icon svg { width: 33px; height: 33px; }
.map-branches strong { font-size: 17px; letter-spacing: -.02em; grid-column: 1 / -1; }
.map-branches > a > span:not(.node-icon) { color: #70667f; font-size: 15px; }
.map-branches > a > span:last-child { padding-left: 7px; }
.map-foot { padding: 16px 27px; display: flex; justify-content: space-between; gap: 15px; border-top: 1px solid var(--line); font-size: 15px; color: var(--muted); }
.map-foot a { color: #6944a3; font-weight: 650; text-decoration: none; }
.identity-strip { background: #f9f8fc; border-bottom: 1px solid var(--line); }
.identity-strip .wrap { display: flex; align-items: center; justify-content: space-around; gap: 25px; padding-block: 24px; font-size: 15px; color: #635b71; }
.identity-strip .wrap > span { display: flex; align-items: center; gap: 10px; }
.identity-strip svg { width: 25px; height: 25px; color: #80629f; }
.identity-strip a { text-decoration: none; }
.section { padding: 100px 0; }
.section-heading { margin-bottom: 43px; }
.section-heading h2 { margin-bottom: 20px; }
.section-heading p:not(.eyebrow) { color: var(--muted); margin: 0; font-size: 19px; }
.centered { text-align: center; }
.question-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.question-card { border: 1px solid var(--line); border-radius: var(--radius); padding: 30px; display: flex; flex-direction: column; background: linear-gradient(155deg, #fff, #fcfbff); }
.question-top { display: flex; justify-content: space-between; align-items: center; margin-bottom: 38px; }
.question-top > span { font-size: 15px; color: #8a8197; }
.question-top svg { color: var(--violet); width: 42px; height: 42px; }
.question-card h3 { max-width: 250px; margin-bottom: 17px; }
.question-card p { color: var(--muted); font-size: 16px; line-height: 1.8; }
.text-link { display: inline-flex; align-items: center; gap: 15px; font-size: 16px; font-weight: 700; text-decoration: none; color: #6340ab; }
.text-link:hover { text-decoration: underline; }
.question-card .text-link { margin-top: auto; padding-top: 10px; }
.pale { background: var(--pale); border-block: 1px solid #efebf5; }
.split { display: grid; grid-template-columns: 1fr 1fr; align-items: center; gap: 100px; }
.split h2 { margin-bottom: 27px; }
.split p:not(.eyebrow) { color: var(--muted); }
.violet { color: var(--violet); }
.split .button { margin-top: 8px; }
.framework-visual { padding: 30px; background: #fff; border: 1px solid #e5dcef; border-radius: 25px; box-shadow: 0 25px 55px #4f2b7510; }
.framework-heading { color: #766883; font-size: 15px; margin-bottom: 28px; text-transform: uppercase; letter-spacing: .08em; }
.framework-layer { display: flex; align-items: center; gap: 17px; padding: 23px 18px; border: 1px solid #d8caed; background: #f2ecfd; border-radius: 13px; }
.framework-number { font-size: 15px; color: #85689b; }
.framework-layer div { flex: 1; }
.framework-layer strong { font-size: 18px; display: block; }
.framework-layer div span { font-size: 15px; display: block; color: #74667f; margin-top: 4px; }
.framework-layer svg { width: 32px; height: 32px; color: #9771bb; }
.framework-layer.second { background: #faf6fd; margin-left: 18px; }
.framework-layer.third { background: #fff; margin-left: 36px; }
.framework-connector { width: 1px; height: 21px; background: #bca8d3; margin-left: 39px; }
.framework-visual p { font-size: 15px; text-align: center; margin: 27px 0 0; }
.heading-row { display: flex; justify-content: space-between; align-items: end; gap: 25px; }
.heading-row h2 { margin-bottom: 0; }
.heading-row > a { margin-bottom: 7px; }
.guide-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 25px; }
.guide-card { border: 1px solid var(--line); border-radius: 17px; overflow: hidden; display: flex; flex-direction: column; background: #fff; }
.card-symbol { display: flex; align-items: center; gap: 20px; min-height: 145px; padding: 30px; background: radial-gradient(ellipse at 95% 20%, #ecddff, transparent), #f7f3fd; border-bottom: 1px solid #eae1f4; color: #7951b6; }
.card-symbol svg { width: 57px; height: 57px; }
.card-symbol span { font-size: 15px; font-weight: 650; }
.guide-card:nth-child(3n + 2) .card-symbol { background: radial-gradient(ellipse at 95% 20%, #e0e3ff, transparent), #f3f4fd; color: #6260a8; }
.guide-card:nth-child(3n + 3) .card-symbol { background: radial-gradient(ellipse at 95% 20%, #f8deee, transparent), #fcf5f9; color: #a65b91; }
.card-body { padding: 28px; display: flex; flex-direction: column; flex: 1; }
.card-body h3 { font-size: 23px; line-height: 1.3; letter-spacing: -.035em; margin-bottom: 18px; }
.card-body h3 a { text-decoration: none; }
.card-body h3 a:hover { color: var(--violet); }
.card-body p { color: var(--muted); font-size: 16px; line-height: 1.75; }
.card-body .text-link { margin-top: auto; padding-top: 8px; }
.source-band { background: #1b1728; color: white; }
.source-band .eyebrow { color: #c3a6ff; }
.source-band .split p:not(.eyebrow) { color: #c3bccf; }
.source-band .text-link { color: #d2baff; }
.source-panel { background: linear-gradient(130deg,#30233e,#262038); border: 1px solid #5b466c; border-radius: 22px; padding: 43px; }
.source-symbol { width: 67px; height: 67px; display: flex; align-items: center; justify-content: center; border-radius: 17px; background: #46305e; color: #c7a6f0; margin-bottom: 26px; }
.source-panel h3 { font-size: 31px; margin-bottom: 22px; }
.source-panel a { color: #d4bbff; font-size: 16px; font-weight: 650; }
.next-banner { display: flex; justify-content: space-between; align-items: center; gap: 45px; background: #f6f2fd; border: 1px solid #e7dcf6; border-radius: 22px; padding: 45px; }
.next-banner h2 { font-size: 35px; margin-bottom: 16px; }
.next-banner p:not(.eyebrow) { color: var(--muted); font-size: 16px; margin: 0; }
.next-banner .button { flex-shrink: 0; max-width: 330px; }
.site-footer { background: #14121c; color: #d5cedf; padding: 68px 0 28px; }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr; gap: 70px; }
.footer-grid p { margin-top: 22px; color: #a9a1b4; font-size: 16px; }
.footer-grid h2 { font-size: 16px; font-weight: 700; margin: 8px 0 24px; letter-spacing: 0; color: #fff; }
.footer-grid > div > a:not(.brand) { display: block; text-decoration: none; font-size: 15px; margin-bottom: 11px; color: #b7aebf; }
.footer-grid > div > a:hover { color: #fff; }
.footer-bottom { display: flex; justify-content: space-between; align-items: end; gap: 60px; margin-top: 45px; padding-top: 26px; border-top: 1px solid #342d40; font-size: 15px; color: #a9a1b4; }
.footer-bottom p { max-width: 750px; margin: 0; }
.footer-bottom > div { display: flex; gap: 24px; flex-shrink: 0; }
.footer-bottom a { text-decoration: none; }
/* Reference and guide reading layouts. */
.page-hero { background: radial-gradient(ellipse at 85% 10%, #322458, transparent 75%), #1b1728; color: #fff; padding: 0 0 65px; }
.breadcrumbs { font-size: 15px; color: #bcb1ca; padding: 21px 0 40px; }
.breadcrumbs ol { list-style: none; display: flex; flex-wrap: wrap; padding: 0; margin: 0; gap: 6px 12px; }
.breadcrumbs li:not(:last-child)::after { content: '/'; margin-left: 12px; color: #7e708f; }
.breadcrumbs a { text-decoration: none; }
.page-hero .eyebrow { color: #b99be9; }
.page-hero h1 { font-size: clamp(39px,4.5vw,63px); max-width: 1000px; margin-bottom: 26px; }
.page-hero > .wrap > p:not(.eyebrow) { color: #c9bfd6; max-width: 790px; font-size: 20px; margin-bottom: 0; }
.reading-hero h1 { font-size: clamp(37px,4.1vw,57px); }
.reading-meta { display: flex; flex-wrap: wrap; gap: 12px 32px; margin-top: 27px; font-size: 15px; color: #b8acc8; }
.reading-meta a { color: #d1baef; text-decoration: none; }
.reading-layout { display: grid; grid-template-columns: 265px minmax(0,750px); gap: 90px; padding-block: 65px 100px; align-items: start; }
.contents { position: sticky; top: 28px; font-size: 15px; line-height: 1.6; }
.contents summary { font-weight: 750; margin-bottom: 21px; list-style: none; font-size: 16px; }
.contents summary::after { content: ' −'; color: #9a83b5; }
.contents details:not([open]) summary::after { content: ' +'; }
.contents ol { list-style: none; padding: 0 0 0 16px; margin: 0; border-left: 1px solid #e3d9f0; }
.contents li { margin-bottom: 13px; }
.contents a { text-decoration: none; color: #756582; }
.contents a:hover { color: #604087; }
.aside-note { padding: 24px; border-radius: 15px; background: #f7f4fb; margin-top: 32px; }
.aside-note p { margin: 12px 0 16px; color: #756b80; }
.aside-note a { color: var(--violet); font-weight: 700; }
.prose { min-width: 0; font-size: 18px; line-height: 1.85; }
.prose p { margin-bottom: 23px; }
.prose section { margin-top: 47px; scroll-margin-top: 30px; }
.prose h2 { font-size: 30px; line-height: 1.25; margin-bottom: 22px; letter-spacing: -.035em; }
.prose a { color: #6943a1; overflow-wrap: anywhere; }
.prose ul, .prose ol { padding-left: 25px; }
.prose li { padding-left: 5px; margin-bottom: 12px; }
.takeaways { background: #f7f3fd; padding: 29px 34px; border: 1px solid #e6dcf4; border-left: 4px solid #8f65db; border-radius: 0 16px 16px 0; }
.takeaways .eyebrow { margin-bottom: 16px; }
.takeaways ul { margin: 0; padding-left: 23px; }
.takeaways li { font-size: 17px; line-height: 1.65; }
.takeaways li:last-child { margin-bottom: 0; }
.sources { border-top: 1px solid var(--line); padding-top: 33px; }
.sources ol { font-size: 16px; }
.sources .eyebrow { margin-bottom: 12px; }
.article-next { padding: 30px; margin-top: 40px; background: #211a31; color: #fff; border-radius: 17px; }
.article-next p { font-size: 18px; }
.article-next a { color: #fff; }
.related > a { display: flex; justify-content: space-between; gap: 25px; padding: 19px 0; border-bottom: 1px solid var(--line); font-size: 17px; font-weight: 650; text-decoration: none; }
.guide-controls { display: none; }
.js .guide-controls { display: block; }
.library { padding-top: 55px; }
.guide-controls label { font-size: 18px; font-weight: 650; display: block; margin-bottom: 13px; }
.search-row { display: flex; gap: 12px; }
.search-row input { flex: 1; min-width: 0; border: 1px solid #cfc1e0; border-radius: 12px; padding: 17px 20px; background: #fff; font-size: 17px; color: var(--ink); }
.search-row input::placeholder { color: #7a7085; }
.search-row button { border: 1px solid #d7cbe5; background: #faf7fe; border-radius: 12px; padding: 13px 24px; font-size: 16px; }
.topic-filters { display: flex; flex-wrap: wrap; gap: 10px; padding: 23px 0 34px; }
.topic-filters button { padding: 9px 18px; border: 1px solid var(--line); border-radius: 50px; background: #fff; font-size: 15px; }
.topic-filters button[aria-pressed="true"] { background: #292034; color: #fff; border-color: #292034; }
.library-heading { display: flex; justify-content: space-between; align-items: center; gap: 20px; margin-bottom: 25px; }
.library-heading h2 { font-size: 28px; }
.library-heading p { margin: 0; color: var(--muted); font-size: 16px; }
#no-results { padding: 45px; border: 1px solid var(--line); background: var(--pale); border-radius: 18px; }
#no-results h3 { margin-bottom: 17px; }
#no-results p { margin: 0; }
.error-page { padding: 100px 0 125px; text-align: center; }
.error-page h1, .error-page > .wrap > p { margin-inline: auto; }
.error-page .actions { margin-top: 35px; }
@media (max-width: 1100px) {
  .wrap, .hero > .wrap { width: calc(100% - 48px); }
  #navigation { gap: 18px; }
  .brand { font-size: 21px; }
  .brand img { width: 38px; height: 38px; }
  .split { gap: 50px; }
  .question-card { padding: 25px; }
  .reading-layout { gap: 50px; grid-template-columns: 235px minmax(0,1fr); }
  .next-banner { gap: 25px; padding: 35px; }
  .next-banner .button { max-width: 290px; }
}
@media (max-width: 900px) {
  .header-row { flex-wrap: wrap; gap: 0; padding-block: 23px; min-height: 85px; }
  #navigation { width: 100%; flex-wrap: wrap; padding-top: 24px; gap: 20px 27px; }
  .js #navigation { display: none; }
  .js #navigation.open { display: flex; }
  .js .menu-toggle { display: flex; align-items: center; gap: 10px; font-size: 15px; border: 1px solid #5d4f71; border-radius: 8px; padding: 8px 12px; background: transparent; color: #fff; }
  .hero { padding-top: 57px; }
  .hero h1 { font-size: 60px; }
  .map-body { padding-inline: 25px; }
  .map-branches { gap: 14px; }
  .map-branches > a { padding: 18px 14px; }
  .question-grid { gap: 16px; }
  .question-card { padding: 23px; }
  .question-card h3 { font-size: 22px; }
  .split { gap: 35px; }
  .framework-visual { padding: 22px; }
  .framework-layer { gap: 10px; padding: 19px 13px; }
  .framework-layer svg { display: none; }
  .framework-layer.third { margin-left: 20px; }
  .framework-layer.second { margin-left: 10px; }
  .guide-grid { grid-template-columns: repeat(2,1fr); }
  .guide-grid > :last-child:nth-child(3) { grid-column: 1 / -1; }
  .guide-grid > :last-child:nth-child(3) .card-symbol { min-height: 110px; }
  .next-banner { flex-direction: column; align-items: flex-start; }
  .next-banner .button { max-width: none; }
  .footer-grid { gap: 35px; grid-template-columns: 1fr 1fr; }
  .footer-grid > div:first-child { grid-column: 1 / -1; }
  .footer-bottom { flex-direction: column; align-items: start; gap: 25px; }
  .reading-layout { grid-template-columns: 210px minmax(0,1fr); gap: 35px; }
  .prose { font-size: 17px; }
  .takeaways { padding: 25px; }
}
@media (max-width: 650px) {
  .wrap, .hero > .wrap { width: calc(100% - 40px); }
  .brand { font-size: 19px; gap: 8px; }
  .brand img { width: 34px; height: 34px; }
  .brand-ca { font-size: 15px; }
  .header-row { padding-block: 19px; }
  .js .menu-toggle { font-size: 15px; padding: 7px 9px; }
  #navigation { flex-direction: column; align-items: stretch; gap: 0; }
  #navigation a { padding: 13px 8px; }
  #navigation .nav-cta { margin-top: 8px; justify-content: space-between; padding-inline: 15px; }
  .hero { padding-top: 41px; }
  .hero-eyebrow { font-size: 15px; letter-spacing: .045em; gap: 7px; }
  .hero h1 { font-size: clamp(39px,10.6vw,60px); line-height: 1.13; margin-bottom: 23px; }
  .hero h1 br { display: none; }
  .hero-dek { font-size: 18px; margin-bottom: 28px; }
  .hero-dek br { display: none; }
  .actions { flex-direction: column; align-items: stretch; gap: 12px; }
  .button { min-height: 55px; padding-inline: 20px; }
  .topic-pills { gap: 8px; margin: 26px 0 35px; }
  .topic-pills a { padding: 6px 11px; }
  .topic-pills a::before { margin-right: 6px; }
  .system-map { border-radius: 16px 16px 0 0; }
  .map-bar { padding: 15px 18px; }
  .map-caption { display: none; }
  .map-body { padding: 23px 18px; }
  .map-centre { padding: 17px 16px; gap: 12px; }
  .map-icon svg { width: 35px; height: 35px; }
  .map-centre strong { font-size: 17px; }
  .map-centre span span { font-size: 15px; line-height: 1.5; }
  .map-centre > span:last-child { display: none; }
  .map-centre::after { height: 17px; bottom: -18px; }
  .map-branches { grid-template-columns: 1fr; gap: 10px; padding-top: 18px; }
  .map-branches::before { display: none; }
  .map-branches > a { padding: 16px; grid-template-columns: 33px 1fr auto; gap: 2px 12px; }
  .node-icon { grid-column: 1; grid-row: 1 / 3; align-self: center; margin: 0; }
  .map-branches strong { grid-column: 2; font-size: 16px; }
  .map-branches > a > span:not(.node-icon) { grid-column: 2; font-size: 15px; }
  .map-branches > a > span:last-child { grid-column: 3; grid-row: 1 / 3; align-self: center; padding: 0; }
  .map-foot { padding: 16px 18px; flex-direction: column; gap: 7px; font-size: 15px; }
  .identity-strip .wrap { flex-direction: column; align-items: flex-start; gap: 14px; padding-block: 24px; }
  .identity-strip a { margin-left: 35px; }
  .section { padding: 65px 0; }
  h2 { font-size: 34px; }
  .section-heading { margin-bottom: 30px; }
  .section-heading h2 br { display: none; }
  .section-heading p:not(.eyebrow) { font-size: 17px; }
  .eyebrow { letter-spacing: .07em; margin-bottom: 16px; }
  .question-grid { grid-template-columns: 1fr; gap: 18px; }
  .question-card { padding: 28px; }
  .question-top { margin-bottom: 24px; }
  .question-card h3 { font-size: 26px; max-width: none; }
  .question-card p { font-size: 17px; }
  .split { grid-template-columns: 1fr; gap: 40px; }
  .split h2 { font-size: 37px; }
  .framework-visual { padding: 23px; }
  .framework-layer { padding: 18px 14px; }
  .framework-layer strong { font-size: 17px; }
  .heading-row { display: block; }
  .heading-row > a { margin-top: 21px; }
  .guide-grid { grid-template-columns: 1fr; gap: 22px; }
  .guide-grid > :last-child:nth-child(3) { grid-column: auto; }
  .card-symbol, .guide-grid > :last-child:nth-child(3) .card-symbol { min-height: 125px; padding: 25px; }
  .card-body { padding: 27px; }
  .card-body h3 { font-size: 25px; }
  .card-body p { font-size: 17px; }
  .source-panel { padding: 29px; }
  .source-panel h3 { font-size: 29px; }
  .next-banner { padding: 29px; gap: 25px; }
  .next-banner h2 { font-size: 31px; }
  .next-banner .button { width: 100%; font-size: 16px; gap: 12px; }
  .site-footer { padding-top: 48px; }
  .footer-grid { gap: 27px 20px; }
  .footer-grid h2 { line-height: 1.4; }
  .footer-grid > div > a:not(.brand) { font-size: 15px; }
  .footer-bottom { margin-top: 30px; }
  .page-hero { padding-bottom: 42px; }
  .breadcrumbs { padding: 13px 0 29px; font-size: 15px; }
  .page-hero h1, .reading-hero h1 { font-size: 37px; line-height: 1.14; }
  .page-hero > .wrap > p:not(.eyebrow) { font-size: 18px; }
  .reading-meta { gap: 8px 20px; margin-top: 24px; }
  .reading-layout { display: block; padding-block: 30px 65px; }
  .contents { position: static; margin-bottom: 29px; }
  .contents details { border: 1px solid var(--line); border-radius: 12px; padding: 20px; }
  .contents summary { margin-bottom: 0; display: flex; justify-content: space-between; }
  .contents details[open] summary { margin-bottom: 21px; }
  .contents .aside-note { display: none; }
  .prose { font-size: 17px; line-height: 1.85; }
  .prose h2 { font-size: 28px; }
  .prose section { margin-top: 35px; }
  .takeaways { padding: 25px; }
  .article-next { padding: 25px; }
  .article-next .button { width: 100%; font-size: 16px; }
  .search-row { gap: 9px; }
  .search-row input { font-size: 16px; padding: 15px; }
  .search-row button { padding: 12px 16px; }
  .topic-filters { gap: 8px; padding-bottom: 26px; }
  .topic-filters button { padding: 7px 13px; }
  .library-heading h2 { font-size: 25px; }
  .library { padding-top: 32px; }
  #no-results { padding: 29px; }
  .error-page { padding-block: 65px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; animation: none !important; }
}