:root {
  --bg: #f4f5f8;
  --bg-warm: #efeee9;
  --surface: rgba(255, 255, 255, 0.88);
  --surface-strong: #ffffff;
  --ink: #10141b;
  --muted: #5d6675;
  --line: rgba(16, 20, 27, 0.11);
  --line-strong: rgba(16, 20, 27, 0.18);
  --accent: #1557ff;
  --accent-soft: #e9efff;
  --accent-deep: #102a72;
  --shadow: 0 18px 40px rgba(16, 20, 27, 0.08);
  --radius-xl: 28px;
  --radius-lg: 22px;
  --radius-md: 16px;
  --shell: min(1200px, calc(100vw - 48px));
  --font-display: "Aptos Display", "Avenir Next", "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  --font-sans: "Aptos", "Avenir Next", "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  --font-mono: "IBM Plex Mono", "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --brand-mark-size: 76px;
  --subscribe-form-width: 259px;
  --subscribe-field-width: 204px;
  --subscribe-button-width: 122px;
  --subscribe-button-start: #1b2545;
  --subscribe-button-end: #4e73d8;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at top right, rgba(21, 87, 255, 0.08), transparent 36%),
    linear-gradient(180deg, var(--bg-warm), var(--bg));
  color: var(--ink);
  font-family: var(--font-sans);
  line-height: 1.6;
}

body.modal-open {
  overflow: hidden;
}

.page-grid {
  position: fixed;
  inset: 0;
  z-index: 0;
  background-image:
    linear-gradient(rgba(16, 20, 27, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(16, 20, 27, 0.04) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.22), transparent 72%);
  pointer-events: none;
}

body > * {
  position: relative;
  z-index: 1;
}

a {
  color: inherit;
  text-decoration: none;
}

code {
  font-family: var(--font-mono);
  font-size: 0.95em;
}

.site-shell {
  width: var(--shell);
  margin: 0 auto;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 18px 0 10px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 16px;
  min-width: 0;
}

.brand-mark {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: var(--brand-mark-size);
  height: var(--brand-mark-size);
  flex: 0 0 var(--brand-mark-size);
  overflow: hidden;
  border-radius: 50%;
  background:
    radial-gradient(circle at 30% 24%, rgba(255, 255, 255, 0.38), rgba(255, 255, 255, 0) 42%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.18), rgba(16, 20, 27, 0.06));
  border: none;
  box-shadow:
    0 16px 28px rgba(16, 20, 27, 0.15),
    0 5px 12px rgba(16, 20, 27, 0.09),
    0 0 16px rgba(239, 238, 233, 0.58);
  color: inherit;
  font-family: inherit;
  font-size: 0;
  letter-spacing: 0;
}

.brand-mark img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.brand-copy {
  display: grid;
}

.brand-kicker,
.section-kicker,
.eyebrow,
.mini-label,
.panel-label {
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.brand-title {
  font-family: var(--font-display);
  font-size: 1.04rem;
  font-weight: 680;
  letter-spacing: -0.015em;
}

.topbar-links {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  color: var(--muted);
  font-size: 0.95rem;
}

.topbar-links a:hover,
.toc a:hover {
  color: var(--accent);
}

.hero,
.article-hero,
.section-block,
.site-footer {
  margin-bottom: 32px;
}

.article-section {
  margin-bottom: 26px;
}

.hero-grid,
.article-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(280px, 0.8fr);
  align-items: start;
  gap: 22px;
  padding: 28px 0 14px;
}

.hero-rail {
  display: grid;
  align-content: start;
  gap: 18px;
}

.hero-followup {
  margin-top: -2px;
  padding: 18px 20px 20px;
}

.hero-followup-copy {
  max-width: none;
}

.hero-followup-text {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.55;
  max-width: none;
}

.hero-copy h1,
.article-intro h1 {
  margin: 10px 0 18px;
  font-family: var(--font-display);
  font-weight: 710;
  letter-spacing: -0.032em;
  line-height: 1;
  text-wrap: balance;
}

.hero-copy h1 {
  font-size: clamp(2.405rem, 5.7vw, 4.955rem);
  font-weight: 680;
  margin-bottom: 10px;
  max-width: 13ch;
}

.hero-subtitle {
  margin: -4px 0 12px;
  color: var(--muted);
  font-size: clamp(1.18rem, 2.2vw, 1.72rem);
  font-weight: 560;
  letter-spacing: -0.018em;
  line-height: 1.12;
  max-width: 30ch;
}

.article-intro h1 {
  font-size: clamp(2.35rem, 5.2vw, 4.35rem);
  max-width: 12ch;
}

.hero-text,
.section-summary {
  color: var(--muted);
  font-size: 1.08rem;
  max-width: 62ch;
}

.hero-copy,
.article-intro,
.hero-rail,
.article-body,
.article-meta,
.hero-panel,
.about-teaser,
.publication-card,
.audience-card,
.principle-card,
.problem-card,
.problem-detail,
.note-card {
  min-width: 0;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.hero-kpis {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(11rem, 1fr));
  gap: 12px;
  align-content: start;
  margin-top: 16px;
}

.subscribe-copy h2 {
  margin: 8px 0 0;
  font-family: var(--font-display);
  font-size: clamp(1.52rem, 2.35vw, 2.08rem);
  line-height: 1.08;
  letter-spacing: -0.023em;
  font-weight: 690;
}

.subscribe-copy .section-summary {
  margin: 10px 0 0;
  max-width: 52ch;
}

.subscribe-modal {
  position: fixed;
  inset: 0;
  z-index: 30;
  display: grid;
  place-items: center;
  padding: 22px;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.18s ease, visibility 0.18s ease;
}

.subscribe-modal.is-open {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.subscribe-modal.legal-open {
  z-index: 32;
  pointer-events: none;
}

.subscribe-modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(16, 20, 27, 0.34);
  backdrop-filter: blur(5px);
}

.subscribe-modal.legal-open .subscribe-modal-backdrop {
  background: transparent;
  backdrop-filter: none;
}

.subscribe-modal-dialog {
  display: contents;
}

.subscribe-form-shell {
  position: relative;
  width: min(calc(100vw - 32px), var(--subscribe-form-width));
}

.subscribe-modal-close {
  position: absolute;
  top: -18px;
  right: -18px;
  width: 38px;
  height: 38px;
  border: 1px solid rgba(16, 20, 27, 0.1);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.94);
  color: var(--muted);
  font-size: 1.45rem;
  line-height: 1;
  cursor: pointer;
  z-index: 2;
  box-shadow: 0 10px 24px rgba(16, 20, 27, 0.08);
}

.subscribe-modal-close:hover,
.subscribe-modal-close:focus-visible {
  color: var(--accent);
  border-color: rgba(21, 87, 255, 0.22);
  background: rgba(255, 255, 255, 1);
}

.subscribe-form-card {
  width: 100%;
  overflow: hidden;
  border: 1px solid rgba(16, 20, 27, 0.11);
  border-radius: var(--radius-xl);
  background: var(--surface);
  box-shadow: var(--shadow);
  backdrop-filter: blur(10px);
}

.subscribe-form-header {
  padding: 16px 0 14px;
  text-align: center;
  border-bottom: 1px solid rgba(16, 20, 27, 0.11);
}

.subscribe-form-header h2 {
  margin: 0;
  font-family: var(--font-display) !important;
  font-size: 1.02rem !important;
  font-weight: 600 !important;
  letter-spacing: -0.01em !important;
  line-height: 1.2 !important;
  color: var(--ink) !important;
}

.subscribe-form-body {
  display: grid;
  justify-items: center;
  gap: 18px;
  margin: 0;
  padding: 28px 10px 34px;
}

.subscribe-field-wrap {
  width: min(calc(100% - 40px), var(--subscribe-field-width));
}

.subscribe-input {
  width: 100%;
  height: 45px;
  padding: 5px 10px;
  border: 2px solid rgb(222, 228, 244);
  border-radius: 50px;
  outline: none;
  background: rgba(255, 255, 255, 0.9);
  color: rgb(113, 106, 106);
  font-family: var(--font-sans);
  font-size: 14px;
}

.subscribe-input::placeholder {
  color: rgba(93, 102, 117, 0.82);
}

.subscribe-input:focus-visible {
  border-color: rgba(21, 87, 255, 0.3);
}

.subscribe-submit-wrap {
  width: min(calc(100% - 40px), var(--subscribe-button-width));
  margin-top: 8px;
}

.subscribe-submit {
  width: 100%;
  height: 45px;
  border: 0;
  border-radius: 50px;
  cursor: pointer;
  color: rgb(255, 255, 255);
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 600;
  background: linear-gradient(135deg, var(--subscribe-button-start), var(--subscribe-button-end));
  box-shadow: 0 8px 18px rgba(78, 115, 216, 0.14);
}

.subscribe-iframe-shell {
  position: relative;
  width: min(calc(100vw - 28px), 286px);
}

.subscribe-iframe-card {
  width: 100%;
  height: min(calc(100vh - 44px), 292px);
  overflow: hidden;
  border: 1px solid rgba(16, 20, 27, 0.11);
  border-radius: var(--radius-xl);
  background: #ffffff;
  box-shadow: var(--shadow);
}

.subscribe-iframe {
  display: block;
  width: calc(100% + 48px);
  height: calc(100% + 32px);
  border: 0;
  background: #ffffff;
  transform: translate(-24px, -14px);
  transform-origin: top left;
}

.subscribe-modal-legal {
  margin: 10px 0 0;
  text-align: center;
  color: var(--muted);
  font-size: 0.84rem;
  line-height: 1.35;
}

.subscribe-modal-legal .action-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 3px 10px;
  border-radius: 999px;
  background: radial-gradient(circle at center, rgba(255, 255, 255, 0.9), rgba(255, 255, 255, 0.46) 62%, rgba(255, 255, 255, 0) 100%);
  box-shadow: 0 0 16px rgba(255, 255, 255, 0.32);
  font-size: inherit;
}

.legal-modal {
  z-index: 31;
}

.legal-modal-dialog {
  position: relative;
  width: min(calc(100vw - 28px), 730px);
}

.legal-modal-shell {
  position: relative;
  width: 100%;
}

.legal-modal-card {
  width: 100%;
  height: min(calc(100vh - 34px), 70vh);
  overflow: hidden;
  border: 1px solid rgba(16, 20, 27, 0.11);
  border-radius: var(--radius-xl);
  background: #ffffff;
  box-shadow: var(--shadow);
}

.legal-frame {
  display: block;
  width: 100%;
  height: 100%;
  border: 0;
  background: #ffffff;
}

.subscribe-modal.legal-open .subscribe-iframe-shell {
  position: fixed;
  top: 30px;
  left: 50%;
  transform: translateX(-18%) scale(0.94);
  transform-origin: top center;
  opacity: 0.98;
  pointer-events: auto;
}

.subscribe-modal.legal-open .subscribe-modal-close {
  display: none;
}

.hero-chip {
  position: relative;
  min-width: 0;
  padding: 12px 14px 14px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.62);
}

.hero-chip p {
  margin: 0;
}

.hero-chip .mini-label {
  margin-bottom: 6px;
}

.hero-chip > p:nth-of-type(2) {
  font-weight: 600;
  line-height: 1.24;
}

.hero-chip-index {
  position: absolute;
  right: 14px;
  bottom: 4px;
  color: rgba(21, 87, 255, 0.28);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 650;
  letter-spacing: 0.08em;
  line-height: 1;
}

.hero-chip-meta {
  margin-top: 8px;
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.4;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 18px;
  border-radius: 999px;
  font-weight: 600;
  transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
}

.button:hover {
  transform: translateY(-1px);
}

.button-primary {
  color: #fff;
  background: linear-gradient(135deg, var(--ink), var(--accent));
  box-shadow: 0 10px 24px rgba(21, 87, 255, 0.2);
}

.button-primary-brand {
  color: #10141b;
  background: linear-gradient(135deg, #e09100, #ffd02e);
  box-shadow: 0 10px 24px rgba(242, 184, 0, 0.34);
}

.button-secondary {
  border: 1px solid var(--line-strong);
  background: rgba(255, 255, 255, 0.65);
}

.panel,
.publication-card,
.audience-card,
.principle-card,
.problem-card,
.problem-detail,
.callout,
.note-card {
  border: 1px solid var(--line);
  background: var(--surface);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow);
}

.panel,
.audience-card,
.principle-card,
.problem-card,
.problem-detail,
.callout,
.note-card,
.publication-card {
  border-radius: var(--radius-lg);
}

.hero-panel,
.article-meta,
.panel {
  padding: 20px;
}

.hero-panel {
  align-self: start;
}

.panel-row {
  display: grid;
  grid-template-columns: minmax(7.5rem, max-content) minmax(0, 1fr);
  align-items: flex-start;
  gap: 14px;
  padding: 10px 0;
  border-top: 1px solid var(--line);
}

.panel-row:first-of-type {
  border-top: 0;
  padding-top: 0;
}

.panel-value {
  max-width: none;
  justify-self: end;
  text-align: right;
  font-weight: 600;
  letter-spacing: -0.02em;
  overflow-wrap: anywhere;
}

.panel-note {
  margin: 16px 0 0;
  color: var(--muted);
}

.about-teaser {
  padding: 18px 20px 20px;
  background:
    linear-gradient(180deg, rgba(233, 239, 255, 0.2), rgba(255, 255, 255, 0.92)),
    var(--surface-strong);
}

.article-hero-note {
  margin-top: 18px;
  max-width: 42rem;
  padding: 16px 18px 18px;
  background:
    linear-gradient(180deg, rgba(233, 239, 255, 0.18), rgba(255, 255, 255, 0.92)),
    var(--surface-strong);
}

.article-hero-points {
  display: grid;
  gap: 10px;
}

.article-hero-points p {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  gap: 10px;
  margin: 0;
  line-height: 1.48;
}

.article-hero-points strong {
  color: var(--accent-deep);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
}

.about-teaser h3,
.about-card h3 {
  margin: 8px 0 12px;
}

.about-teaser p:last-of-type {
  margin-bottom: 0;
}

.site-home .topbar-links a,
.publication-page .topbar-links a,
.legal-page .topbar-links a,
.site-home .inline-link,
.publication-page .inline-link,
.legal-page .inline-link,
.site-home .action-link,
.publication-page .action-link,
.legal-page .action-link {
  color: var(--accent-deep);
  font-weight: 600;
  text-decoration-line: underline;
  text-decoration-thickness: 1.5px;
  text-underline-offset: 0.14em;
  text-decoration-color: rgba(21, 87, 255, 0.35);
}

.site-home .topbar-links a:hover,
.site-home .topbar-links a:focus-visible,
.publication-page .topbar-links a:hover,
.publication-page .topbar-links a:focus-visible,
.legal-page .topbar-links a:hover,
.legal-page .topbar-links a:focus-visible,
.site-home .inline-link:hover,
.site-home .inline-link:focus-visible,
.publication-page .inline-link:hover,
.publication-page .inline-link:focus-visible,
.legal-page .inline-link:hover,
.legal-page .inline-link:focus-visible,
.site-home .action-link:hover,
.site-home .action-link:focus-visible,
.publication-page .action-link:hover,
.publication-page .action-link:focus-visible,
.legal-page .action-link:hover,
.legal-page .action-link:focus-visible {
  color: var(--accent);
  text-decoration-color: currentColor;
}

.action-link-button {
  display: inline;
  margin: 0;
  padding: 0;
  border: 0;
  background: none;
  color: inherit;
  font: inherit;
  line-height: inherit;
  text-align: inherit;
  appearance: none;
  cursor: pointer;
}

.site-home .hero-followup-text > .action-link,
.publication-page .hero-followup-text > .action-link {
  color: var(--accent-deep);
  font-weight: 650;
  text-decoration-line: underline;
  text-decoration-thickness: 1.15px;
  text-underline-offset: 0.14em;
  text-decoration-color: rgba(21, 87, 255, 0.26);
}

.site-home .hero-followup-text > .action-link[data-subscribe-frame],
.publication-page .hero-followup-text > .action-link[data-subscribe-frame] {
  font-weight: 650;
  text-decoration-thickness: 1.15px;
  text-decoration-color: rgba(21, 87, 255, 0.26);
}

.site-home .hero-followup-text > .action-link:hover,
.site-home .hero-followup-text > .action-link:focus-visible,
.publication-page .hero-followup-text > .action-link:hover,
.publication-page .hero-followup-text > .action-link:focus-visible {
  color: var(--accent);
  text-decoration-color: currentColor;
}

@media (min-width: 561px) {
  .site-home .topbar-links a,
  .publication-page .topbar-links a,
  .legal-page .topbar-links a {
    color: var(--muted);
    font-weight: 500;
  }
}

.about-link {
  display: inline-flex;
  margin-top: 14px;
}

.section-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 18px;
}

.site-home .section-heading {
  display: grid;
  gap: 8px;
  align-items: start;
  justify-content: start;
}

.site-home .section-summary {
  max-width: 64ch;
}

.legal-page .section-summary {
  max-width: none;
}

.about-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.section-heading h2,
.article-section h2 {
  margin: 8px 0 0;
  font-family: var(--font-display);
  font-size: clamp(1.68rem, 2.7vw, 2.42rem);
  line-height: 1.08;
  letter-spacing: -0.025em;
  font-weight: 690;
  text-wrap: balance;
}

.publication-grid,
.audience-grid,
.principle-grid,
.problem-map,
.problem-grid,
.two-column-note {
  display: grid;
  gap: 18px;
}

.publication-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.audience-grid,
.principle-grid,
.problem-map {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.publication-card,
.audience-card,
.principle-card,
.problem-card {
  padding: 18px 18px 20px;
}

.publication-card.published {
  border-color: rgba(21, 87, 255, 0.24);
  background:
    linear-gradient(180deg, rgba(21, 87, 255, 0.08), rgba(255, 255, 255, 0.92)),
    var(--surface-strong);
}

.publication-card.coming-soon {
  background: rgba(255, 255, 255, 0.6);
}

.roadmap-cta-card {
  border-color: rgba(21, 87, 255, 0.24);
  background:
    linear-gradient(180deg, rgba(21, 87, 255, 0.08), rgba(255, 255, 255, 0.94)),
    var(--surface-strong);
}

.roadmap-cta-card .action-link {
  display: inline-flex;
  width: fit-content;
  margin-top: 6px;
}

.publication-card h3,
.audience-card h3,
.principle-card h3,
.problem-card h3,
.problem-detail h3 {
  margin: 8px 0 10px;
  font-family: var(--font-display);
  font-size: 1.22rem;
  line-height: 1.14;
  letter-spacing: -0.018em;
  font-weight: 680;
}

.publication-card p,
.audience-card p,
.principle-card p,
.problem-card p,
.problem-detail p,
.article-section p,
.article-section li {
  color: #212733;
  overflow-wrap: anywhere;
}

.verbatim-subhead {
  margin: 18px 0 8px;
  font-family: var(--font-display);
  font-size: 1.08rem;
  line-height: 1.18;
  letter-spacing: -0.01em;
  font-weight: 680;
}

.verbatim-list {
  display: grid;
  gap: 6px;
  margin-top: 10px;
}

.verbatim-list p {
  margin: 0;
}

.publication-meta,
.publication-footer {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 16px;
}

.pill {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 0 10px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent-deep);
  font-size: 0.82rem;
  font-weight: 650;
}

.publication-link {
  margin-top: 14px;
  color: var(--accent);
  font-weight: 650;
}

.article-layout {
  display: grid;
  grid-template-columns: minmax(230px, 260px) minmax(0, 1fr);
  gap: 24px;
}

.toc {
  position: sticky;
  top: 14px;
  align-self: start;
}

.toc-title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
}

.toc a {
  display: block;
  padding: 7px 0;
  color: var(--muted);
  border-top: 1px solid var(--line);
}

.toc a:first-of-type {
  border-top: 0;
}

.toc a.active {
  color: var(--accent);
  font-weight: 650;
}

.article-body {
  min-width: 0;
}

.publication-page .article-body,
.single-article-home .article-body {
  padding-bottom: 14px;
}

.article-section {
  padding: 26px;
  border-radius: var(--radius-xl);
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.84);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.publication-page #about-author.article-section,
.single-article-home #about-author.article-section {
  display: block;
  padding: 18px 20px 16px;
  scroll-margin-top: 18px;
}

.publication-page #about-author .section-kicker,
.single-article-home #about-author .section-kicker {
  grid-column: 1 / -1;
  margin: 0;
}

.publication-page #about-author h2,
.single-article-home #about-author h2 {
  grid-column: 1 / -1;
  margin: 2px 0 2px;
  font-size: clamp(1.34rem, 1.8vw, 1.72rem);
  line-height: 1.05;
}

.publication-page #about-author p,
.single-article-home #about-author p {
  margin: 0 0 10px;
  font-size: 0.98rem;
  line-height: 1.42;
}

.publication-page #about-author .section-kicker + p,
.single-article-home #about-author .section-kicker + p {
  margin-top: 6px;
}

.publication-page #about-author p:last-child,
.single-article-home #about-author p:last-child {
  margin-bottom: 0;
}

.callout {
  padding: 18px 20px;
  margin: 18px 0;
  background:
    linear-gradient(135deg, rgba(21, 87, 255, 0.08), rgba(255, 255, 255, 0.96)),
    var(--surface-strong);
}

.criteria-list,
.summary-list {
  padding-left: 20px;
  margin: 18px 0 0;
}

.criteria-list li,
.summary-list li {
  margin-bottom: 12px;
}

.two-column-note,
.problem-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: 18px;
}

.note-card,
.problem-detail {
  padding: 16px;
}

.equation-block {
  margin: 18px 0 0;
  padding: 18px 18px 6px;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(21, 87, 255, 0.2);
  background: linear-gradient(180deg, rgba(233, 239, 255, 0.95), rgba(255, 255, 255, 0.92));
}

.equation-block code {
  display: block;
  margin: 12px 0 16px;
  padding: 12px 14px;
  border-radius: 14px;
  background: rgba(16, 20, 27, 0.05);
  overflow-x: auto;
}

.math-inline {
  display: inline-block;
  vertical-align: -0.1em;
}

.math-inline-rendered {
  display: inline-block;
  vertical-align: -0.02em;
}

.inline-join {
  display: inline-flex;
  align-items: baseline;
  gap: 0.08em;
  white-space: nowrap;
}

.equation-stack {
  display: grid;
  gap: 10px;
  margin: 12px 0 16px;
}

.equation-block math[display="block"] {
  display: block;
  margin: 0;
  padding: 0;
  border-radius: 0;
  background: transparent;
  overflow-x: auto;
}

.equation-stack math[display="block"] {
  margin: 0;
}

.equation-verbatim {
  margin: 10px 0 14px;
  padding: 12px 14px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.94);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 0.95rem;
  line-height: 1.55;
  white-space: pre-wrap;
  overflow-x: auto;
}

.equation-rendered {
  margin: 10px 0 14px;
  padding: 12px 14px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.94);
  overflow-x: auto;
}

.equation-rendered math,
.math-inline-rendered math {
  color: var(--ink);
}

.equation-rendered math[display="block"] {
  display: block;
  margin: 0;
}

.math-inline-rendered math {
  display: inline-block;
}

.site-footer {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
  align-items: stretch;
  padding: 18px 20px 22px;
  margin-bottom: 40px;
}

.site-footer-legal-split {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.footer-column {
  min-width: 0;
  display: grid;
  align-content: start;
}

.publication-page .footer-column-author .footer-links {
  gap: 8px;
}

.publication-page .footer-column-author .footer-link {
  font-size: 0.96rem;
  line-height: 1.25;
  white-space: nowrap;
}

.footer-column .mini-label {
  margin: 0 0 10px;
}

.footer-links {
  display: grid;
  gap: 10px;
}

.site-footer-compact {
  grid-template-columns: minmax(0, 1.7fr) minmax(0, 1fr);
  align-items: start;
}

.site-footer-legal-split-compact {
  grid-template-columns: minmax(0, 1.7fr) minmax(0, 1fr) minmax(0, 1fr);
}

.footer-column-wide {
  min-width: 0;
}

.footer-links-inline {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
  align-items: center;
}

.footer-links-inline .footer-link {
  white-space: nowrap;
}

.legal-note-card {
  max-width: none;
  margin-top: 18px;
  padding: 16px 18px;
}

.legal-note-card .mini-label {
  margin: 0 0 10px;
}

.legal-note-text {
  margin: 0;
  color: var(--ink);
  font-size: 0.98rem;
  line-height: 1.42;
  white-space: nowrap;
  overflow-wrap: normal;
}

@media (max-width: 1120px) {
  .hero-kpis,
  .about-grid,
  .site-footer,
  .publication-grid,
  .audience-grid,
  .principle-grid,
  .problem-map {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .article-layout {
    grid-template-columns: 1fr;
  }

  .toc {
    position: static;
  }
}

@media (max-width: 1040px) {
  .hero-grid,
  .article-hero {
    grid-template-columns: 1fr;
    gap: 18px;
  }

  .hero-rail {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }

  .hero-panel,
  .article-meta,
  .about-teaser {
    height: 100%;
  }

  .section-heading {
    display: grid;
    align-items: start;
    justify-content: start;
    gap: 8px;
  }

  .section-summary {
    max-width: 64ch;
  }
}

@media (max-width: 860px) {
  .topbar,
  .section-heading,
  .hero-grid,
  .hero-followup,
  .article-hero,
  .two-column-note,
  .problem-grid {
    grid-template-columns: 1fr;
    display: grid;
  }

  .topbar {
    gap: 14px;
  }

  .topbar-links {
    gap: 12px;
  }

  .panel-value {
    text-align: left;
    max-width: none;
    justify-self: start;
  }

  .panel-row {
    display: grid;
  }

}

@media (max-width: 560px) {
  :root {
    --brand-mark-size: 64px;
  }

  .topbar-links {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 10px 14px;
  }

  .topbar-links a {
    white-space: nowrap;
  }

  .hero-actions .button {
    flex: 1 1 100%;
  }

  .brand-title {
    font-size: 0.98rem;
  }

  .brand-kicker {
    font-size: 0.7rem;
  }

  .hero-copy .eyebrow,
  .article-intro .eyebrow {
    color: rgba(16, 20, 27, 0.64);
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.075em;
    line-height: 1.5;
  }
}

@media (max-width: 640px) {
  :root {
    --shell: calc(100vw - 28px);
  }

  .hero-kpis,
  .publication-grid,
  .about-grid,
  .audience-grid,
  .principle-grid,
  .problem-map,
  .two-column-note,
  .problem-grid {
    grid-template-columns: 1fr;
  }

  .article-section,
  .panel,
  .publication-card,
  .audience-card,
  .principle-card,
  .problem-card {
    padding: 18px;
  }

  .hero,
  .article-hero,
  .section-block,
  .site-footer {
    margin-bottom: 22px;
  }

  .article-section {
    margin-bottom: 18px;
  }

  .topbar {
    gap: 10px;
    padding-top: 12px;
    padding-bottom: 4px;
  }

  .brand {
    align-items: center;
  }

  .hero-grid,
  .article-hero {
    padding-top: 12px;
  }

  .hero-copy .eyebrow,
  .article-intro .eyebrow {
    margin: 0 0 12px;
  }

  .hero-copy h1,
  .article-intro h1 {
    margin: 0 0 14px;
    line-height: 1.04;
  }

  .hero-copy h1 {
    max-width: 11.5ch;
  }

  .hero-subtitle {
    margin: 0 0 16px;
    line-height: 1.18;
    max-width: 20ch;
  }

  .hero-rail {
    grid-template-columns: 1fr;
  }

  .legal-note-text {
    white-space: normal;
  }

  .legal-modal-dialog {
    width: min(calc(100vw - 28px), 730px);
  }

  .legal-modal-card {
    height: min(calc(100vh - 28px), 72vh);
  }

  .subscribe-modal.legal-open .subscribe-iframe-shell {
    position: relative;
    top: auto;
    left: auto;
    right: auto;
    transform: none;
    margin: 0 auto 10px;
  }

  .subscribe-modal.legal-open .subscribe-modal-close {
    display: block;
  }

  .subscribe-modal {
    padding: 14px;
  }

  .subscribe-modal-dialog {
    display: contents;
  }

  .subscribe-form-shell {
    width: min(calc(100vw - 20px), var(--subscribe-form-width));
  }

  .subscribe-iframe-shell {
    width: min(calc(100vw - 20px), 286px);
  }

  .subscribe-iframe-card {
    height: min(calc(100vh - 30px), 292px);
  }

  .subscribe-form-body {
    padding: 28px 6px 30px;
  }

  .page-grid {
    background-size: 44px 44px;
  }

  .publication-page .footer-column-author .footer-link {
    white-space: normal;
  }

  .publication-page .article-body,
  .single-article-home .article-body {
    padding-bottom: 0;
  }

  .publication-page #about-author.article-section,
  .single-article-home #about-author.article-section {
    display: block;
    padding: 18px;
  }

  .publication-page #about-author h2,
  .single-article-home #about-author h2 {
    margin-top: 4px;
    font-size: clamp(1.52rem, 2.35vw, 2.08rem);
  }

  .publication-page #about-author p,
  .single-article-home #about-author p {
    margin-top: 10px;
  }
}