:root {
  color-scheme: light;
  --bg: oklch(0.975 0.008 105);
  --surface: oklch(0.995 0.004 105);
  --surface-strong: oklch(0.94 0.018 145);
  --text: oklch(0.22 0.025 150);
  --muted: oklch(0.39 0.025 150);
  --accent: oklch(0.42 0.1 153);
  --accent-hover: oklch(0.35 0.09 153);
  --accent-text: oklch(0.99 0.008 145);
  --border: oklch(0.86 0.018 125);
  --warning-bg: oklch(0.94 0.035 88);
  --warning-border: oklch(0.74 0.09 78);
  --warning-text: oklch(0.28 0.045 68);
  --focus: oklch(0.48 0.16 260);
  --font-sans: "Segoe UI", Arial, sans-serif;
  --font-serif: Georgia, "Times New Roman", serif;
  --wrap: 75rem;
  --measure: 72ch;
  --radius-sm: 0.55rem;
  --radius-md: 0.9rem;
  --radius-lg: 1.35rem;
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  margin: 0;
  min-width: 20rem;
  min-height: 100dvh;
  color: var(--text);
  background: var(--bg);
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.6;
}

a {
  color: var(--accent);
  text-decoration-thickness: from-font;
  text-underline-offset: 0.18em;
}

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

a:focus-visible,
[tabindex]:focus-visible {
  outline: 0.18rem solid var(--focus);
  outline-offset: 0.2rem;
}

img {
  display: block;
  max-width: 100%;
  height: auto;
}

.metric-pixel {
  position: absolute;
  inset-inline-start: -9999px;
  width: 1px;
  height: 1px;
}

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

.skip-link {
  position: fixed;
  inset-block-start: 0.75rem;
  inset-inline-start: 0.75rem;
  z-index: 100;
  padding: 0.7rem 1rem;
  border-radius: var(--radius-sm);
  color: var(--text);
  background: var(--surface);
  box-shadow: 0 0 0 1px var(--border), 0 0.5rem 1.5rem oklch(0.2 0.02 150 / 0.15);
  transform: translateY(-160%);
}

.skip-link:focus {
  transform: none;
}

.site-header {
  border-bottom: 1px solid var(--border);
  background: oklch(0.995 0.004 105 / 0.94);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  min-height: 4.5rem;
  padding-block: 0.75rem;
}

.logo {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  gap: 0.7rem;
  min-height: 2.75rem;
  color: var(--text);
  font-size: 1.15rem;
  font-weight: 750;
  letter-spacing: -0.02em;
  text-decoration: none;
}

.logo-mark {
  display: grid;
  place-items: center;
  width: 2rem;
  height: 2rem;
  border-radius: 0.65rem;
  color: var(--accent-text);
  background: var(--accent);
  font-family: var(--font-serif);
  font-size: 1.1rem;
  font-weight: 700;
}

.primary-nav ul {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-end;
  gap: 0.25rem 0.5rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.primary-nav a {
  display: inline-flex;
  align-items: center;
  min-height: 2.75rem;
  padding-inline: 0.7rem;
  border-radius: var(--radius-sm);
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 650;
  text-decoration: none;
}

.primary-nav a:hover,
.primary-nav a[aria-current="page"] {
  color: var(--text);
  background: var(--surface-strong);
}

.main-layout {
  padding-block: clamp(1.5rem, 4vw, 3.5rem) 4.5rem;
}

.main-layout > div,
.main-layout > article {
  width: 100%;
  max-width: var(--measure);
  margin-inline: auto;
}

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 0.55rem;
  margin-bottom: 1.25rem;
  color: var(--muted);
  font-size: 0.82rem;
}

.breadcrumbs a {
  color: inherit;
}

.content-article {
  max-width: var(--measure);
}

.content-article h1,
.content-article h2,
.content-article h3,
.content-article h4,
.materials-heading h1,
.materials-group h2,
.related h2 {
  color: var(--text);
  font-family: var(--font-serif);
  text-wrap: balance;
}

.content-article h1,
.materials-heading h1 {
  margin: 0 0 1.35rem;
  font-size: clamp(2rem, 6vw, 3.65rem);
  line-height: 1.08;
  letter-spacing: -0.035em;
}

.content-article h2 {
  margin: 2.7rem 0 1rem;
  font-size: clamp(1.45rem, 3vw, 2rem);
  line-height: 1.2;
}

.content-article h3 {
  margin: 2rem 0 0.75rem;
  font-size: 1.25rem;
  line-height: 1.3;
}

.content-article h4,
.content-article h5,
.content-article h6 {
  margin: 1.5rem 0 0.65rem;
  font-size: 1.05rem;
  line-height: 1.35;
}

.content-article p,
.content-article li,
.materials-heading p {
  text-wrap: pretty;
}

.content-article p {
  margin: 0 0 1.1rem;
}

.content-article ul,
.content-article ol {
  margin: 0 0 1.4rem;
  padding-inline-start: 1.5rem;
}

.content-article li + li {
  margin-top: 0.45rem;
}

.content-article blockquote {
  margin: 1.75rem 0;
  padding: 0.25rem 0 0.25rem 1.25rem;
  border-inline-start: 0.25rem solid var(--accent);
  color: var(--muted);
  font-family: var(--font-serif);
  font-size: 1.1rem;
}

.content-article pre,
.content-article code {
  font-family: Consolas, "Courier New", monospace;
}

.content-article pre {
  overflow-x: auto;
  padding: 1rem;
  border-radius: var(--radius-md);
  background: oklch(0.92 0.012 145);
  font-size: 0.9rem;
}

.content-article img {
  margin-block: 1.5rem;
  border-radius: var(--radius-sm);
  box-shadow: 0 0 0 1px oklch(0 0 0 / 0.1);
}

.table-scroll {
  max-width: 100%;
  margin-block: 1.5rem;
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--surface);
}

.table-scroll table {
  width: 100%;
  border-collapse: collapse;
}

.table-scroll th,
.table-scroll td {
  min-width: 8rem;
  padding: 0.7rem 0.8rem;
  border-bottom: 1px solid var(--border);
  text-align: start;
  vertical-align: top;
}

.related {
  margin-top: 3.5rem;
  padding: 1.5rem;
  border-radius: var(--radius-lg);
  background: var(--surface);
  box-shadow: 0 0 0 1px var(--border);
}

.related h2 {
  margin: 0 0 1rem;
  font-size: 1.35rem;
}

.related ul {
  display: grid;
  gap: 0.65rem;
  margin: 0;
  padding-inline-start: 1.15rem;
}

.eyebrow {
  margin: 0 0 0.75rem;
  color: var(--accent);
  font-size: 0.82rem;
  font-weight: 750;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.materials-heading {
  margin-bottom: 3rem;
}

.materials-heading p:last-child {
  max-width: 60ch;
  color: var(--muted);
  font-size: 1.08rem;
}

.materials-group {
  margin-top: 3rem;
}

.materials-group h2 {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  margin: 0 0 1rem;
  font-size: clamp(1.4rem, 4vw, 2rem);
}

.materials-group h2 span {
  color: var(--muted);
  font-family: var(--font-sans);
  font-size: 0.85rem;
  font-variant-numeric: tabular-nums;
}

.materials-group ul {
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--border);
  list-style: none;
}

.materials-group li {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 1rem;
  padding-block: 0.8rem;
  border-bottom: 1px solid var(--border);
}

.materials-group li span {
  color: var(--muted);
  font-size: 0.84rem;
  font-variant-numeric: tabular-nums;
}

.site-footer {
  border-top: 1px solid var(--border);
  background: var(--surface);
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.75rem 1.5rem;
  padding-block: 2rem;
  color: var(--muted);
  font-size: 0.88rem;
}

.footer-inner p {
  margin: 0;
}

@media (max-width: 52rem) {
  .header-inner {
    align-items: flex-start;
    flex-direction: column;
    gap: 0.35rem;
  }

  .primary-nav {
    width: 100%;
  }

  .primary-nav ul {
    flex-wrap: wrap;
    justify-content: flex-start;
  }
}

@media (max-width: 30rem) {
  .wrap {
    width: min(100% - 1.25rem, var(--wrap));
  }

  .content-article h1,
  .materials-heading h1 {
    overflow-wrap: break-word;
  }

  .materials-group li {
    grid-template-columns: 1fr;
    gap: 0.2rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}

@media (prefers-contrast: more) {
  :root {
    --muted: oklch(0.29 0.02 150);
    --border: oklch(0.55 0.025 125);
  }
}

@media print {
  .site-header,
  .site-footer,
  .related,
  .breadcrumbs {
    display: none;
  }

  body {
    color: #000;
    background: #fff;
    font-size: 11pt;
  }

  .main-layout {
    display: block;
    padding: 0;
  }

  a {
    color: inherit;
  }
}