/* Industry — design-system tokens and component classes.
   Base copied from index.html's <style>; shared by blog/ and about pages. */
:root {
  --color-bg: #f2f2f3;
  --color-surface: #e9e9ea;
  --color-text: #1d1f20;
  --color-accent: #5980a6;
  --color-accent-2: #728fab;
  --color-divider: color-mix(in srgb, #1d1f20 16%, transparent);

  --color-neutral-100: #f5f5f8;
  --color-neutral-200: #e7e7ea;
  --color-neutral-300: #d4d4d7;
  --color-neutral-400: #b7b7ba;
  --color-neutral-500: #98989b;
  --color-neutral-600: #7a7a7d;
  --color-neutral-700: #5d5d60;
  --color-neutral-800: #424244;
  --color-neutral-900: #2b2b2d;

  --color-accent-100: #eef6ff;
  --color-accent-200: #d6ebff;
  --color-accent-300: #b5d9fd;
  --color-accent-400: #94bce3;
  --color-accent-500: #749dc4;
  --color-accent-600: #597ea3;
  --color-accent-700: #416180;
  --color-accent-800: #2c455d;
  --color-accent-900: #1d2d3d;

  --font-heading: "Barlow Condensed", system-ui, sans-serif;
  --font-heading-weight: 600;
  --font-body: "Barlow", system-ui, sans-serif;

  --space-1: 3.4px;
  --space-2: 6.8px;
  --space-3: 10.2px;
  --space-4: 13.6px;
  --space-6: 20.4px;
  --space-8: 27.2px;

  --radius-sm: 2px;
  --radius-md: 4px;
  --radius-lg: 7px;

  --shadow-sm: 0 1px 2px color-mix(in srgb, #2b2b2d 14%, transparent);
  --shadow-md: 0 3px 10px color-mix(in srgb, #2b2b2d 16%, transparent);
  --shadow-lg: 0 12px 32px color-mix(in srgb, #2b2b2d 22%, transparent);
}

body {
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
}
h1, h2, h3, h4 { font-family: var(--font-heading); font-weight: var(--font-heading-weight); }

.blueprint {
  position: relative;
  border: 1px solid var(--color-divider);
  border-radius: 0;
}
.blueprint.halftone, .blueprint.plate, .blueprint.duotone { overflow: visible; }
.blueprint > .corner {
  position: absolute; width: 11px; height: 11px;
  color: color-mix(in srgb, var(--color-text) 55%, transparent);
}
.blueprint > .corner::before, .blueprint > .corner::after {
  content: ""; position: absolute; background: currentColor;
}
.blueprint > .corner::before { left: 5px; top: 0; width: 1px; height: 100%; }
.blueprint > .corner::after  { top: 5px; left: 0; width: 100%; height: 1px; }
.blueprint > .corner.tl { top: -6px; left: -6px; }
.blueprint > .corner.tr { top: -6px; right: -6px; }
.blueprint > .corner.bl { bottom: -6px; left: -6px; }
.blueprint > .corner.br { bottom: -6px; right: -6px; }

.duotone{position:relative;overflow:hidden}
.duotone::after{content:"";position:absolute;inset:0;pointer-events:none;
  background:var(--color-accent);mix-blend-mode:color}

*, *::before, *::after { box-sizing: border-box; }
body { margin: 0; font-size: 15px; line-height: 1.55; font-weight: 400; }
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading); font-weight: var(--font-heading-weight);
  line-height: 1.12; letter-spacing: -0.015em; margin: 0 0 var(--space-2);
}
h1 { font-size: 42px; }
h2 { font-size: 32px; }
h3 { font-size: 25px; }
h4 { font-size: 20px; }
h5 { font-size: 16px; }
h6 { font-size: 13px; letter-spacing: 0.08em; text-transform: uppercase; }
p { margin: 0 0 var(--space-3); }
/* accent-700, not accent: #5980a6 on the page ground is 3.7:1, under AA for body text. */
a { color: var(--color-accent-700); text-underline-offset: 3px; }
img { display: block; max-width: 100%; }
figure { margin: 0; }
figcaption {
  font-size: 11px; margin-top: var(--space-1);
  color: color-mix(in srgb, var(--color-text) 55%, transparent);
}
.text-muted { color: color-mix(in srgb, var(--color-text) 55%, transparent); }
:focus { outline: none; }
:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 2px; }
::selection { background: color-mix(in srgb, var(--color-accent) 30%, transparent); }

.hr {
  height: 1px; border: 0; margin: var(--space-4) 0;
  background: var(--color-divider);
}

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  cursor: pointer; text-decoration: none;
  font-family: var(--font-heading); font-weight: var(--font-heading-weight);
  font-size: 14px; line-height: 1.2; color: var(--color-text);
  background: transparent; border: 1px solid transparent;
  padding: var(--space-2) calc(var(--space-3) * 1.2);
  border-radius: var(--radius-md);
}
.btn svg { display: block; }
.btn:disabled { opacity: 0.45; cursor: not-allowed; }
.btn-primary { background: var(--color-accent); color: var(--color-bg); }
.btn-primary:hover { background: var(--color-accent-600); }
.btn-primary:active { background: var(--color-accent-700); }
.btn-secondary { border-color: var(--color-divider); }
.btn-secondary:hover { background: color-mix(in srgb, var(--color-text) 7%, transparent); }
.btn-secondary:active { background: color-mix(in srgb, var(--color-text) 14%, transparent); }
.btn-ghost { color: var(--color-accent); padding-inline: var(--space-1); }
.btn-ghost:hover { background: color-mix(in srgb, var(--color-accent) 10%, transparent); }
.btn-ghost:active { background: color-mix(in srgb, var(--color-accent) 18%, transparent); }

.field > label {
  display: block; font-size: 12px; margin-bottom: 5px;
  color: color-mix(in srgb, var(--color-text) 70%, transparent);
}
.input {
  width: 100%; min-height: 36px; padding: 6px 10px; font: inherit;
  font-size: 14px; color: var(--color-text); caret-color: var(--color-accent);
  background: var(--color-surface);
  border: 1px solid var(--color-divider); border-radius: var(--radius-md);
}
.input:hover { border-color: color-mix(in srgb, var(--color-text) 45%, transparent); }
.input:focus-visible { border-color: var(--color-accent); outline-offset: 0; }

.tag {
  display: inline-flex; align-items: center; font-size: 11px;
  letter-spacing: 0.02em; padding: 3px 10px;
  border-radius: calc(var(--radius-md) * 0.75);
}
.tag-accent { background: var(--color-accent-100); color: var(--color-accent-800); }
.tag-neutral { background: var(--color-neutral-100); color: var(--color-neutral-800); }
.tag-outline { border: 1px solid var(--color-accent); color: var(--color-accent); }

.nav {
  display: flex; align-items: center; gap: var(--space-4);
  padding: var(--space-3) var(--space-4);
  border-bottom: none;
}
.nav-brand {
  font-family: var(--font-heading); font-weight: var(--font-heading-weight);
  font-size: 18px; margin-right: auto;
}
.nav a { color: inherit; text-decoration: none; font-size: 14px; }
.nav a:hover, .nav a[aria-current='page'] { color: var(--color-accent); }

.table { width: 100%; border-collapse: collapse; font-size: 14px; }
.table th {
  text-align: left; font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase;
  color: color-mix(in srgb, var(--color-text) 60%, transparent);
  padding: var(--space-2); border-bottom: 1px solid var(--color-divider);
}
.table td {
  padding: var(--space-2);
  border-bottom: 1px solid color-mix(in srgb, var(--color-text) 8%, transparent);
}
.table tbody tr:hover { background: color-mix(in srgb, var(--color-text) 4%, transparent); }

/* blueprint frame: components are wireframe objects */
.btn, .input, .tag { border-radius: 0; }
.btn { border: 1px solid var(--color-divider); }
.btn-primary { border-color: var(--color-accent); }
.btn-ghost { border-color: transparent; }

body{margin:0;text-wrap:pretty}
html{scroll-behavior:smooth}
a{color:var(--color-accent-700);text-decoration:none}
a:hover{color:var(--color-accent)}

/* ===== Shared page scaffolding (nav, footer, kickers) ===== */
.site-nav { max-width: 1200px; margin: 0 auto; padding: 14px clamp(20px, 5vw, 72px); gap: 22px; }
.site-nav .nav-brand { font-size: 20px; letter-spacing: .02em; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 clamp(20px, 5vw, 72px); }

.site-footer {
  padding: 40px 0; border-top: 1px solid var(--color-divider);
  display: flex; flex-wrap: wrap; gap: 16px;
  font-size: 13px; line-height: 24px;
  color: color-mix(in srgb, var(--color-text) 70%, transparent);
}
.site-footer-links { display: flex; gap: 16px; flex-wrap: wrap; margin-left: auto; }

.kicker {
  display: block; font-size: 13px; line-height: 12px; letter-spacing: .08em;
  text-transform: uppercase; font-weight: 600; color: var(--color-accent-700);
  margin-bottom: 12px;
}
.rule { height: 1px; border: 0; margin: 0 0 34px; background: var(--color-divider); }

@media (max-width: 719px) {
  .nav-links { display: none; }
}

/* ===== Article layout ===== */
.article { max-width: 860px; margin: 0 auto; padding: 56px clamp(20px, 5vw, 72px) 48px; }
.article-header { margin-bottom: 44px; }
.article-header h1 {
  font-size: clamp(34px, 5.4vw, 56px); line-height: 1.06;
  letter-spacing: .01em; text-transform: uppercase; margin: 16px 0 0 -.045em;
}
.article-header .lede {
  font-size: 17px; line-height: 1.5; max-width: 62ch; margin: 22px 0 0;
  color: color-mix(in srgb, var(--color-text) 82%, transparent);
}
.article-meta {
  display: flex; flex-wrap: wrap; gap: 12px; margin-top: 18px;
  font-size: 13px; letter-spacing: .04em; text-transform: uppercase;
  color: color-mix(in srgb, var(--color-text) 60%, transparent);
}

.article section { margin-bottom: 48px; }
.article h2 {
  font-size: clamp(24px, 3vw, 30px); line-height: 1.12;
  letter-spacing: .02em; text-transform: uppercase;
  margin: 44px 0 16px; scroll-margin-top: 24px;
}
.article h3 {
  font-size: 20px; letter-spacing: .02em; text-transform: uppercase;
  margin: 30px 0 12px;
}
.article h4 { font-size: 17px; letter-spacing: .01em; margin: 22px 0 8px; }
.article p, .article li {
  font-size: 15px; line-height: 24px;
  color: color-mix(in srgb, var(--color-text) 82%, transparent);
}
.article p { margin: 0 0 14px; }
.article ul, .article ol { margin: 0 0 16px; padding-left: 22px; }
.article li { margin-bottom: 8px; }
.article li:last-child { margin-bottom: 0; }
.article strong { color: var(--color-text); }
.article em { color: inherit; }
.article a { text-decoration: underline; text-underline-offset: 3px; }

/* Callout / panel boxes */
.box {
  position: relative; border: 1px solid var(--color-divider);
  padding: 20px 22px; margin: 26px 0;
}
.box-label {
  display: block; font-size: 12px; line-height: 12px; letter-spacing: .08em;
  text-transform: uppercase; font-weight: 600; color: var(--color-accent-700);
  margin-bottom: 12px;
}
.box > p:last-child, .box > ul:last-child, .box > ol:last-child,
.box > div:last-child, .box > pre:last-child { margin-bottom: 0; }
.box-accent { background: color-mix(in srgb, var(--color-accent) 7%, transparent); }
.box-warning { border-left: 3px solid var(--color-accent-700); }

/* Monospace blocks (scripts, file lists, checklists) */
.mono, .article pre {
  background: var(--color-surface); border: 1px solid var(--color-divider);
  padding: 16px 18px; overflow-x: auto; margin: 0 0 14px;
  font-family: ui-monospace, Menlo, Consolas, monospace;
  font-size: 13px; line-height: 20px; color: var(--color-text);
  white-space: pre;
}
.mono-caption {
  font-family: ui-monospace, Menlo, Consolas, monospace; font-size: 11px;
  letter-spacing: .08em; color: var(--color-accent-700); margin: 0 0 8px;
}

/* Tables */
.table-wrap { overflow-x: auto; margin: 26px 0; }
.table-wrap .table { min-width: 520px; }

/* Card grids */
.card-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 18px; margin: 26px 0; }
.card {
  border: 1px solid var(--color-divider); padding: 18px 20px;
}
.card > :last-child { margin-bottom: 0; }

/* Glossary entries */
.glossary-item {
  border: 1px solid var(--color-divider); padding: 20px 22px; margin: 0 0 18px;
  scroll-margin-top: 24px;
}
.glossary-item h3 { margin: 0 0 10px; }
.glossary-head { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.glossary-tip {
  border-top: 1px solid var(--color-divider); margin-top: 14px; padding-top: 12px;
  font-size: 13px; line-height: 20px;
  color: color-mix(in srgb, var(--color-text) 70%, transparent);
}

/* Steps */
.step-head { display: flex; align-items: flex-start; gap: 18px; margin-bottom: 18px; }
.step-number {
  flex-shrink: 0; width: 44px; height: 44px; display: grid; place-items: center;
  border: 1px solid var(--color-accent); color: var(--color-accent-700);
  font-family: var(--font-heading); font-weight: 600; font-size: 22px;
}
.step-head h2 { margin: 0 0 4px; }
.step-sub { font-size: 14px; color: color-mix(in srgb, var(--color-text) 60%, transparent); margin: 0; }

/* FAQ */
.faq-item { border-top: 1px solid var(--color-divider); padding: 18px 0; }
.faq-item:last-child { border-bottom: 1px solid var(--color-divider); }
.faq-item h3 { font-size: 17px; text-transform: none; letter-spacing: 0; margin: 0 0 8px; }
.faq-item p { margin: 0; color: color-mix(in srgb, var(--color-text) 70%, transparent); }

/* Related articles */
.related-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 18px; margin-top: 22px; }
.related-card { display: block; border: 1px solid var(--color-divider); padding: 18px 20px; }
.related-card:hover { border-color: var(--color-accent); }
.related-card h3 { font-size: 18px; text-transform: uppercase; letter-spacing: .02em; margin: 0 0 8px; }
.related-card p { font-size: 13px; line-height: 20px; margin: 0; color: color-mix(in srgb, var(--color-text) 70%, transparent); }

/* Blog index list */
.blog-index-item { border-bottom: 1px solid var(--color-divider); }
.blog-index-item:last-child { border-bottom: none; }

/* In-page TOC */
.toc { margin: 26px 0; }
.toc ul, .toc ol { margin: 0; padding-left: 0; list-style: none; }
.toc li { margin-bottom: 6px; }
.toc a { text-decoration: none; }