:root {
  --color-bg: #f7f7f4;
  --color-surface: #ffffff;
  --color-surface-muted: #eef2f1;
  --color-text: #17232d;
  --color-text-muted: #5f6d76;
  --color-border: #d9e0df;
  --color-border-strong: #b8c7c7;
  --color-accent: #176b78;
  --color-accent-dark: #0f4e59;
  --color-accent-soft: #e0f0ef;
  --color-note: #e9f0f4;
  --color-tip: #e6f1eb;
  --color-warning: #f6eee0;
  --color-methodology: #eeeaf5;
  --font-sans: ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --content-width: 1180px;
  --article-width: 780px;
  --radius-sm: 0.35rem;
  --radius-md: 0.65rem;
  --shadow-focus: 0 0 0 3px rgba(23, 107, 120, 0.22);
}

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

html {
  overflow-x: clip;
  color: var(--color-text);
  background: var(--color-bg);
  font-family: var(--font-sans);
  line-height: 1.55;
  text-size-adjust: 100%;
}

body {
  overflow-x: clip;
  min-width: 320px;
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
}

a {
  color: var(--color-accent-dark);
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.16em;
}

a:hover {
  color: var(--color-accent);
}

a:focus-visible,
button:focus-visible,
[tabindex]:focus-visible {
  outline: none;
  box-shadow: var(--shadow-focus);
  border-radius: var(--radius-sm);
}

img,
svg,
video {
  max-width: 100%;
  height: auto;
}

.container {
  width: min(calc(100% - 2rem), var(--content-width));
  margin-inline: auto;
}

.site-header {
  border-bottom: 1px solid var(--color-border);
  background: rgba(255, 255, 255, 0.94);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  min-height: 4.5rem;
}

.brand {
  color: var(--color-text);
  font-size: 1.12rem;
  font-weight: 750;
  letter-spacing: -0.02em;
  text-decoration: none;
  white-space: nowrap;
}

.site-nav ul,
.breadcrumbs ol,
.footer-links {
  display: flex;
  align-items: center;
  gap: 1.1rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-nav__link {
  display: inline-block;
  padding: 0.5rem 0;
  color: var(--color-text);
  font-size: 0.92rem;
  font-weight: 650;
  text-decoration: none;
}

.site-nav__link:hover,
.site-nav__link.is-active {
  color: var(--color-accent-dark);
}

.site-main {
  min-height: 60vh;
  padding: 3.5rem 0 5rem;
}

.eyebrow,
.card__eyebrow {
  margin: 0 0 0.65rem;
  color: var(--color-accent-dark);
  font-size: 0.75rem;
  font-weight: 750;
  letter-spacing: 0.1em;
  line-height: 1.3;
  text-transform: uppercase;
}

.hero {
  max-width: 800px;
  padding: 2rem 0 4.5rem;
}

.hero h1,
.page-header h1,
.not-found h1 {
  max-width: 850px;
  margin: 0;
  color: var(--color-text);
  font-size: clamp(2.1rem, 4.4vw, 3.8rem);
  letter-spacing: -0.055em;
  line-height: 1.04;
}

.hero h1 {
  max-width: 760px;
}

.hero__description,
.page-header__deck {
  max-width: 720px;
  margin: 1.4rem 0 0;
  color: var(--color-text-muted);
  font-size: clamp(1.08rem, 2vw, 1.3rem);
  line-height: 1.6;
}

.button {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  min-height: 2.9rem;
  margin-top: 1.8rem;
  padding: 0.75rem 1rem;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 700;
  text-decoration: none;
}

.button--primary {
  background: var(--color-accent-dark);
  color: #ffffff;
}

.button--primary:hover {
  background: var(--color-accent);
  color: #ffffff;
}

.button--secondary {
  border-color: var(--color-border-strong);
  background: var(--color-surface);
  color: var(--color-accent-dark);
}

.button--secondary:hover {
  border-color: var(--color-accent);
}

.section {
  padding: 4.5rem 0;
  border-top: 1px solid var(--color-border);
}

.section--muted {
  margin-inline: calc(50% - 50vw);
  padding-inline: max(1rem, calc((100vw - var(--content-width)) / 2));
  background: var(--color-surface-muted);
}

.section-heading {
  max-width: 720px;
  margin-bottom: 2rem;
}

.section-heading h2,
.hub h2,
.article h2,
.homepage h2 {
  margin: 0;
  color: var(--color-text);
  font-size: clamp(1.65rem, 3vw, 2.35rem);
  letter-spacing: -0.035em;
  line-height: 1.15;
}

.section-heading p:last-child {
  margin: 0.85rem 0 0;
  color: var(--color-text-muted);
}

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

.card-grid--resources {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.card {
  display: flex;
  min-height: 100%;
  flex-direction: column;
  padding: 1.25rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
}

.card:hover {
  border-color: var(--color-border-strong);
}

.card--linked {
  color: inherit;
  text-decoration: none;
}

.card--linked:hover,
.card--linked:focus-visible {
  border-color: var(--color-accent);
  color: inherit;
}

.card h3 {
  margin: 0;
  color: var(--color-text);
  font-size: 1.05rem;
  line-height: 1.3;
}

.card p {
  margin: 0.65rem 0 1rem;
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

.card__status {
  display: inline-block;
  margin-top: auto;
  color: #50636a;
  font-size: 0.78rem;
  font-weight: 650;
}

.resource-card .card__status {
  width: fit-content;
  padding: 0.18rem 0.45rem;
  border-radius: var(--radius-sm);
  background: var(--color-surface-muted);
}

.card__arrow {
  align-self: flex-end;
  margin-top: 0.7rem;
  color: var(--color-accent-dark);
  font-size: 1.1rem;
  font-weight: 750;
}

.topic-card {
  min-height: 10rem;
}

.text-link {
  display: inline-flex;
  gap: 0.45rem;
  margin-top: 1.5rem;
  font-weight: 700;
}

.principles-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 2rem;
}

.principles-grid h3 {
  margin: 0;
  font-size: 1.05rem;
}

.principles-grid p {
  margin: 0.5rem 0 0;
  color: var(--color-text-muted);
}

.homepage-summary {
  display: grid;
  grid-template-columns: minmax(12rem, 0.8fr) minmax(0, 1.2fr);
  gap: 2rem;
  margin: -1.5rem 0 3.5rem;
  padding: 1.5rem;
  border: 1px solid var(--color-border);
  border-left: 3px solid var(--color-accent);
  border-radius: var(--radius-md);
  background: var(--color-surface);
}

.homepage-summary h2 {
  font-size: 1.55rem;
}

.homepage-summary__content {
  max-width: 650px;
}

.summary-points {
  margin-bottom: 0 !important;
  padding-left: 1.2rem !important;
  color: var(--color-text-muted);
  font-size: 0.96rem;
}

.breadcrumbs {
  margin-bottom: 1.75rem;
}

.breadcrumbs ol {
  flex-wrap: wrap;
  gap: 0.55rem;
  color: var(--color-text-muted);
  font-size: 0.85rem;
}

.breadcrumbs a {
  color: var(--color-text-muted);
}

.page-header {
  max-width: var(--article-width);
  margin-bottom: 2.4rem;
}

.article-header h1,
.hub .page-header h1 {
  font-size: clamp(2.15rem, 4vw, 3.5rem);
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 2rem;
  margin: 1.5rem 0 0;
  color: var(--color-text-muted);
  font-size: 0.86rem;
}

.article-meta div {
  display: flex;
  gap: 0.35rem;
}

.article-meta dt {
  font-weight: 700;
}

.article-meta dd {
  margin: 0;
}

.prose {
  max-width: var(--article-width);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: 1.04rem;
  line-height: 1.75;
}

.prose > *:first-child {
  margin-top: 0;
}

.prose h1,
.prose h2,
.prose h3,
.prose h4,
.prose h5,
.prose h6 {
  margin: 2.3rem 0 0.7rem;
  color: var(--color-text);
  letter-spacing: -0.025em;
  line-height: 1.25;
}

.prose h1 {
  font-size: 2rem;
}

.prose h2 {
  font-size: 1.6rem;
}

.prose h3 {
  font-size: 1.25rem;
}

.prose p,
.prose ul,
.prose ol,
.prose blockquote,
.prose pre,
.prose table {
  margin: 1rem 0;
}

.prose ul,
.prose ol {
  padding-left: 1.45rem;
}

.prose li + li {
  margin-top: 0.35rem;
}

.prose .task-item {
  display: flex;
  gap: 0.55rem;
  padding-left: 0.1rem;
  list-style: none;
}

.prose .task-item input {
  width: 1rem;
  height: 1rem;
  margin-top: 0.35rem;
  accent-color: var(--color-accent);
}

.prose code {
  padding: 0.12em 0.3em;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface-muted);
  font-family: var(--font-mono);
  font-size: 0.88em;
}

.prose pre {
  overflow-x: auto;
  padding: 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: #18252d;
  color: #f2f6f5;
}

.prose pre code {
  padding: 0;
  border: 0;
  background: transparent;
  color: inherit;
}

.prose blockquote {
  margin-left: 0;
  padding: 0.25rem 1.25rem;
  border-left: 3px solid var(--color-border-strong);
  color: var(--color-text-muted);
}

.table-scroll {
  overflow-x: auto;
  margin: 1.5rem 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
}

.prose table {
  width: 100%;
  min-width: 36rem;
  margin: 0;
  border-collapse: collapse;
  font-size: 0.95rem;
  line-height: 1.5;
}

.prose th,
.prose td {
  padding: 0.75rem 0.9rem;
  border-bottom: 1px solid var(--color-border);
  text-align: left;
  vertical-align: top;
}

.prose th {
  background: var(--color-surface-muted);
  font-size: 0.85rem;
  font-weight: 750;
}

.prose tr:last-child td {
  border-bottom: 0;
}

.callout {
  margin: 1.5rem 0;
  padding: 1rem 1.1rem;
  border: 1px solid var(--color-border);
  border-left-width: 3px;
  border-radius: var(--radius-sm);
}

.callout p {
  margin: 0.35rem 0 0;
}

.callout--note {
  border-left-color: #5b829b;
  background: var(--color-note);
}

.callout--tip {
  border-left-color: #4b8b6b;
  background: var(--color-tip);
}

.callout--warning {
  border-left-color: #ae7b31;
  background: var(--color-warning);
}

.callout--template,
.callout--methodology {
  border-left-color: #76619e;
  background: var(--color-methodology);
}

.trust-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.75rem;
  max-width: var(--article-width);
  margin: 0 0 2rem;
}

.trust-card {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  padding: 0.9rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  color: var(--color-text-muted);
  font-size: 0.87rem;
}

.trust-card strong {
  color: var(--color-text);
  font-size: 0.83rem;
}

.related-articles {
  max-width: var(--article-width);
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--color-border);
}

.related-articles h2 {
  font-size: 1.35rem;
}

.hub__intro {
  margin-bottom: 3rem;
}

.empty-state {
  max-width: var(--article-width);
  margin-top: 3rem;
  padding: 1.5rem;
  border: 1px dashed var(--color-border-strong);
  border-radius: var(--radius-md);
  background: var(--color-surface);
}

.empty-state h2 {
  font-size: 1.25rem;
}

.empty-state p {
  margin: 0.5rem 0 0;
  color: var(--color-text-muted);
}

.not-found {
  max-width: 650px;
  padding: 3rem 0;
}

.not-found p:not(.eyebrow) {
  color: var(--color-text-muted);
  font-size: 1.1rem;
}

.site-footer {
  padding: 3rem 0 1.5rem;
  border-top: 1px solid var(--color-border);
  background: var(--color-surface);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 3rem;
}

.footer__brand,
.footer__heading {
  margin: 0;
  font-weight: 750;
}

.footer__description {
  max-width: 30rem;
  margin: 0.6rem 0 0;
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

.footer__heading {
  margin-bottom: 0.75rem;
  font-size: 0.85rem;
}

.footer-links {
  align-items: flex-start;
  flex-direction: column;
  gap: 0.45rem;
}

.footer-links a,
.footer__placeholder {
  font-size: 0.88rem;
}

.footer__placeholder {
  color: var(--color-text-muted);
}

.footer__placeholder small {
  margin-left: 0.3rem;
  color: var(--color-text-muted);
  font-size: 0.72rem;
}

.footer__bottom {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 2.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-size: 0.78rem;
}

@media (max-width: 900px) {
  .card-grid--resources,
  .card-grid--topics {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (max-width: 680px) {
  .container {
    width: min(calc(100% - 1.25rem), var(--content-width));
  }

  .site-header__inner {
    align-items: flex-start;
    flex-direction: column;
    gap: 0.35rem;
    padding: 0.85rem 0;
  }

  .site-nav ul {
    flex-wrap: wrap;
    gap: 0.2rem 0.9rem;
  }

  .site-nav__link {
    padding: 0.25rem 0;
  }

  .site-main {
    padding-top: 2.25rem;
  }

  .hero {
    padding-top: 1rem;
    padding-bottom: 3rem;
  }

  .section {
    padding: 3rem 0;
  }

  .section--muted {
    padding-inline: 0.625rem;
  }

  .card-grid,
  .card-grid--resources,
  .card-grid--topics,
  .principles-grid,
  .trust-grid,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .homepage-summary {
    margin-top: -0.5rem;
    grid-template-columns: 1fr;
    gap: 0.8rem;
  }

  .footer__bottom {
    align-items: flex-start;
    flex-direction: column;
  }
}