:root {
  color-scheme: dark;
  --kmd-color-canvas: #0d0e11;
  --kmd-color-surface-1: #16181d;
  --kmd-color-border: #242731;
  --kmd-color-text: #fff;
  --kmd-color-text-muted: #808594;
  --kmd-color-accent: #e65616;
  --kmd-color-on-accent: #0d0e11;
  --kmd-color-success: #10b981;
  --kmd-color-warning: #ffd700;
  --kmd-color-indigo: #4f46e5;
  --kmd-color-focus: #60a5fa;
  --kmd-color-reading: #d8d9dc;
  --kmd-font-sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --kmd-reading-measure: 66ch;
  --kmd-shell-max: 86.25rem;
  --kmd-radius-sm: .75rem;
  --kmd-radius-md: 1.125rem;
  --kmd-radius-lg: 1.5rem;
  --kmd-radius-xl: 1.875rem;
  --kmd-space-section: clamp(4.5rem, 8vw, 7.5rem);
  --kmd-shadow-card: 0 1.5rem 4rem rgb(0 0 0 / 18%);
  --kmd-motion-fast: 180ms ease;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; overflow-x: hidden; background: var(--kmd-color-canvas); color: var(--kmd-color-text); font-family: var(--kmd-font-sans); font-size: 1rem; line-height: 1.65; }
img { display: block; max-width: 100%; }
a { color: inherit; text-underline-offset: .22em; }
a:hover { color: var(--kmd-color-warning); }
:focus-visible { outline: .2rem solid var(--kmd-color-focus); outline-offset: .25rem; }
.skip-link { position: fixed; left: 1rem; top: 1rem; z-index: 100; padding: .75rem 1rem; border-radius: var(--kmd-radius-sm); background: var(--kmd-color-accent); color: var(--kmd-color-on-accent); font-weight: 700; transform: translateY(-180%); }
.skip-link:focus { transform: none; }
.shell { width: min(calc(100% - clamp(2rem, 5vw, 4rem)), var(--kmd-shell-max)); margin-inline: auto; }
.shell--reading { max-width: var(--kmd-reading-measure); }
.preview-bar { position: relative; z-index: 30; padding: .5rem 1rem; background: var(--kmd-color-warning); color: var(--kmd-color-on-accent); text-align: center; font-size: .78rem; font-weight: 700; letter-spacing: .06em; }

.site-header { position: sticky; top: 0; z-index: 20; border-bottom: 1px solid rgb(255 255 255 / 6%); background: rgb(13 14 17 / 86%); backdrop-filter: blur(1.5rem); }
.header-inner { min-height: 5.75rem; display: flex; align-items: center; justify-content: space-between; gap: clamp(1.5rem, 4vw, 3rem); }
.brand { min-width: 0; display: inline-flex; align-items: center; gap: .9rem; color: var(--kmd-color-text); text-decoration: none; }
.brand:hover { color: var(--kmd-color-text); }
.brand-logo { width: 6.5rem; height: auto; flex: 0 0 auto; }
.surface-name { padding-left: .9rem; border-left: 1px solid var(--kmd-color-border); color: var(--kmd-color-text-muted); font-size: .76rem; font-weight: 650; letter-spacing: .13em; text-transform: uppercase; }
.site-nav { display: flex; flex-wrap: wrap; align-items: center; justify-content: flex-end; gap: clamp(1rem, 3vw, 2.25rem); }
.site-nav a, .footer-nav a { position: relative; color: var(--kmd-color-text-muted); font-weight: 650; text-decoration: none; transition: color var(--kmd-motion-fast); }
.site-nav a::after { content: ""; position: absolute; left: 0; right: 100%; bottom: -.45rem; height: 2px; background: var(--kmd-color-accent); transition: right var(--kmd-motion-fast); }
.site-nav a:hover, .footer-nav a:hover { color: var(--kmd-color-text); }
.site-nav a:hover::after { right: 0; }

.hero { position: relative; min-height: min(52rem, calc(100svh - 5.75rem)); display: grid; align-items: center; padding-block: clamp(5rem, 10vw, 9rem); overflow: hidden; }
.hero::before { content: ""; position: absolute; inset: -30% auto auto -20%; width: 48rem; height: 48rem; border-radius: 50%; background: radial-gradient(circle, rgb(230 86 22 / 10%), transparent 68%); pointer-events: none; }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.03fr) minmax(24rem, .97fr); align-items: center; gap: clamp(3rem, 7vw, 7rem); }
.hero-content { position: relative; z-index: 1; }
.eyebrow { margin: 0 0 1rem; color: var(--kmd-color-accent); font-size: .75rem; font-weight: 700; letter-spacing: .15em; text-transform: uppercase; }
h1, h2, h3 { margin: 0; line-height: 1.08; letter-spacing: -.035em; text-wrap: balance; }
h1 { max-width: 12ch; font-size: clamp(3rem, 6.3vw, 5.75rem); font-weight: 700; }
h2 { font-size: clamp(2rem, 4vw, 3.3rem); font-weight: 700; }
h3 { font-size: clamp(1.25rem, 2vw, 1.6rem); font-weight: 700; }
.hero-copy, .deck { max-width: 46rem; color: var(--kmd-color-text-muted); font-size: clamp(1.08rem, 2vw, 1.35rem); }
.hero-copy { margin-top: 1.75rem; }
.button-row { display: flex; flex-wrap: wrap; gap: 1rem; margin-top: 2.25rem; }
.button { min-height: 3.5rem; display: inline-flex; align-items: center; justify-content: center; gap: .75rem; padding: .9rem 1.55rem; border: 1px solid var(--kmd-color-accent); border-radius: var(--kmd-radius-md); background: var(--kmd-color-accent); box-shadow: 0 0 1.75rem rgb(230 86 22 / 24%); color: var(--kmd-color-text); font-size: 1.1875rem; font-weight: 700; line-height: 1.25; text-decoration: none; transition: transform var(--kmd-motion-fast), background-color var(--kmd-motion-fast), box-shadow var(--kmd-motion-fast), border-color var(--kmd-motion-fast); }
.button:not(.button--secondary):not(.button--disabled):hover { border-color: var(--kmd-color-indigo); background: var(--kmd-color-indigo); box-shadow: 0 0 1.75rem rgb(79 70 229 / 28%); color: var(--kmd-color-text); transform: translateY(-2px); }
.button:focus-visible { outline: .2rem solid var(--kmd-color-focus); outline-offset: .25rem; }
.button:not(.button--disabled):active { box-shadow: 0 0 .8rem rgb(79 70 229 / 20%); transform: translateY(1px); }
.button:not(.button--secondary):not(.button--disabled):hover:active { box-shadow: 0 0 .8rem rgb(79 70 229 / 20%); transform: translateY(1px); }
.button--secondary { border-color: var(--kmd-color-border); background: rgb(255 255 255 / 3%); box-shadow: none; color: var(--kmd-color-text); }
.button--secondary:not(.button--disabled):hover { border-color: var(--kmd-color-warning); background: rgb(255 255 255 / 3%); box-shadow: 0 0 1.25rem rgb(255 215 0 / 8%); color: var(--kmd-color-text); }
.button--disabled { border-color: var(--kmd-color-border); background: var(--kmd-color-surface-1); box-shadow: none; color: var(--kmd-color-text-muted); cursor: not-allowed; opacity: 1; transform: none; }

.system-visual { position: relative; isolation: isolate; min-height: 31rem; display: grid; place-items: center; border: 1px solid rgb(255 255 255 / 8%); border-radius: var(--kmd-radius-xl); background: radial-gradient(circle at 50% 46%, rgb(230 86 22 / 17%), transparent 26%), linear-gradient(145deg, rgb(22 24 29 / 98%), rgb(13 14 17 / 92%)); box-shadow: var(--kmd-shadow-card), inset 0 1px rgb(255 255 255 / 4%); overflow: hidden; }
.system-visual::before { content: ""; position: absolute; inset: 0; z-index: -2; background-image: linear-gradient(rgb(255 255 255 / 3%) 1px, transparent 1px), linear-gradient(90deg, rgb(255 255 255 / 3%) 1px, transparent 1px); background-size: 2.5rem 2.5rem; mask-image: linear-gradient(to bottom, black, transparent 90%); }
.system-visual::after { content: ""; position: absolute; inset: 10%; z-index: -1; border-radius: 50%; background: conic-gradient(from 80deg, transparent, rgb(79 70 229 / 18%), transparent 28%, rgb(16 185 129 / 14%), transparent 56%, rgb(255 215 0 / 13%), transparent 82%); filter: blur(1.5rem); }
.visual-orbit { position: absolute; border: 1px solid rgb(255 255 255 / 9%); border-radius: 50%; }
.visual-orbit--outer { width: 23rem; height: 23rem; }
.visual-orbit--inner { width: 15rem; height: 15rem; border-color: rgb(230 86 22 / 24%); }
.visual-core { width: 9rem; aspect-ratio: 1; display: grid; place-content: center; border: 1px solid rgb(230 86 22 / 45%); border-radius: 50%; background: rgb(13 14 17 / 90%); box-shadow: 0 0 3rem rgb(230 86 22 / 18%); text-align: center; }
.visual-core strong { font-size: .8rem; letter-spacing: .16em; }
.visual-core small { margin-top: .3rem; color: var(--kmd-color-text-muted); font-size: .65rem; }
.visual-node { position: absolute; min-width: 6.6rem; padding: .65rem .8rem; border: 1px solid var(--kmd-color-border); border-radius: 999px; background: var(--kmd-color-surface-1); color: var(--kmd-color-text-muted); text-align: center; font-size: .68rem; font-weight: 700; letter-spacing: .12em; }
.visual-node--signal { top: 14%; left: 12%; border-color: rgb(255 215 0 / 35%); }
.visual-node--context { right: 8%; top: 38%; border-color: rgb(79 70 229 / 44%); }
.visual-node--decision { bottom: 15%; left: 20%; border-color: rgb(16 185 129 / 40%); }
.system-visual > p { position: absolute; bottom: 1.5rem; margin: 0; color: var(--kmd-color-text-muted); font-size: .72rem; letter-spacing: .12em; text-transform: uppercase; }

.section { padding-block: var(--kmd-space-section); }
.section + .section { border-top: 1px solid var(--kmd-color-border); }
.section-heading { display: flex; align-items: end; justify-content: space-between; gap: 2rem; margin-bottom: 2.5rem; }
.card-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1.5rem; }
.card { position: relative; min-width: 0; padding: clamp(1.6rem, 3vw, 2.65rem); border: 1px solid var(--kmd-color-border); border-radius: var(--kmd-radius-xl); background: linear-gradient(145deg, var(--kmd-color-surface-1), rgb(18 20 25)); box-shadow: 0 1.2rem 3rem rgb(0 0 0 / 12%); overflow: hidden; transition: transform var(--kmd-motion-fast), border-color var(--kmd-motion-fast), box-shadow var(--kmd-motion-fast); }
.card:hover { border-color: rgb(255 215 0 / 22%); box-shadow: 0 1.5rem 3.5rem rgb(0 0 0 / 24%), 0 0 2.5rem rgb(255 215 0 / 5%); transform: translateY(-3px); }
.card-accent { width: 3.5rem; height: .22rem; margin-bottom: 1.5rem; border-radius: 999px; background: var(--kmd-color-accent); }
.card:nth-child(4n + 2) .card-accent { background: var(--kmd-color-warning); }
.card:nth-child(4n + 3) .card-accent { background: var(--kmd-color-indigo); }
.card:nth-child(4n + 4) .card-accent { background: var(--kmd-color-success); }
.card h3 { margin-block: 1.25rem; }
.card h3 a { text-decoration: none; }
.card p { color: var(--kmd-color-text-muted); }
.card__meta { display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.featured-card .card { padding: clamp(2rem, 5vw, 4rem); }
.featured-card .card h3 { max-width: 22ch; font-size: clamp(1.8rem, 4vw, 3rem); }
.topic-chip, .state, .resource-id { width: fit-content; display: inline-flex; padding: .35rem .7rem; border: 1px solid var(--kmd-color-border); border-radius: 999px; color: var(--kmd-color-text-muted); font-size: .68rem; font-weight: 700; letter-spacing: .07em; text-decoration: none; text-transform: uppercase; }
.state { border-color: rgb(230 86 22 / 32%); color: var(--kmd-color-accent); }
.text-link { color: var(--kmd-color-warning); font-weight: 700; text-decoration: none; }
.text-link:hover { color: var(--kmd-color-text); }
.topic-list { display: flex; flex-wrap: wrap; gap: .75rem; }
.topics-section { display: grid; grid-template-columns: minmax(0, 1fr) minmax(18rem, .75fr); align-items: end; gap: 3rem; }
.cta-block { position: relative; display: flex; align-items: end; justify-content: space-between; gap: 3rem; margin-block: var(--kmd-space-section); padding: clamp(2.25rem, 6vw, 4.5rem); border: 1px solid var(--kmd-color-border); border-radius: var(--kmd-radius-xl); background: radial-gradient(circle at 90% 10%, rgb(230 86 22 / 15%), transparent 34%), linear-gradient(135deg, var(--kmd-color-surface-1), rgb(13 14 17)); overflow: hidden; }
.cta-block::before { content: ""; position: absolute; inset: 0 auto 0 0; width: .25rem; background: var(--kmd-color-accent); }
.cta-copy { max-width: 50rem; }
.cta-block p:not(.eyebrow) { color: var(--kmd-color-text-muted); }

.page-header, .article-header { padding-block: clamp(4.5rem, 9vw, 8rem); }
.page-header h1, .article-header h1 { max-width: none; font-size: clamp(2.5rem, 6vw, 4.8rem); }
.breadcrumb { display: flex; flex-wrap: wrap; gap: .65rem; margin-bottom: 2rem; color: var(--kmd-color-text-muted); font-size: .85rem; }
.article-kicker { display: flex; flex-wrap: wrap; gap: .75rem; margin-bottom: 1.5rem; }
.article-meta { display: flex; flex-wrap: wrap; gap: 2rem; padding: 1rem 0 0; color: var(--kmd-color-text-muted); }
.article-meta div { display: flex; gap: .45rem; }
.article-meta dt { font-weight: 700; }
.article-meta dd { margin: 0; }
.diagram { position: relative; min-height: 15rem; display: flex; flex-wrap: wrap; align-items: center; justify-content: center; gap: 1rem; margin-bottom: 4rem; padding: 2rem; border: 1px solid var(--kmd-color-border); border-radius: var(--kmd-radius-xl); background: radial-gradient(circle, rgb(79 70 229 / 10%), transparent 50%), var(--kmd-color-surface-1); overflow: auto; }
.diagram span { width: 4.5rem; aspect-ratio: 1; border: 1px solid var(--kmd-color-accent); border-radius: 50%; box-shadow: 0 0 1.5rem rgb(230 86 22 / 10%); }
.diagram span:nth-child(2) { border-color: var(--kmd-color-warning); }
.diagram span:nth-child(3) { border-color: var(--kmd-color-success); }
.diagram p { flex-basis: 100%; margin: 0; color: var(--kmd-color-text-muted); text-align: center; }
.diagram--resource span { border-radius: var(--kmd-radius-sm); transform: rotate(45deg); }
.prose { font-size: clamp(1.05rem, 1.4vw, 1.18rem); }
.prose > * + * { margin-top: 1.35em; }
.prose h2 { margin-top: 2.5em; font-size: clamp(1.65rem, 3vw, 2.35rem); }
.prose h3 { margin-top: 2em; }
.prose p, .prose li { color: var(--kmd-color-reading); }
.prose blockquote { margin-inline: 0; padding: 1.25rem 1.5rem; border: 1px solid var(--kmd-color-border); border-left: .25rem solid var(--kmd-color-accent); border-radius: 0 var(--kmd-radius-md) var(--kmd-radius-md) 0; background: var(--kmd-color-surface-1); font-size: 1.1em; }
.prose table { width: 100%; border-collapse: collapse; }
.prose th, .prose td { padding: .75rem; border: 1px solid var(--kmd-color-border); text-align: left; }
.prose pre { max-width: 100%; padding: 1rem; overflow: auto; border: 1px solid var(--kmd-color-border); border-radius: var(--kmd-radius-sm); background: #090a0c; }
.practical-callout, .related-content, .download-pending { margin-block: 4rem; padding: clamp(1.75rem, 4vw, 2.5rem); border: 1px solid var(--kmd-color-border); border-radius: var(--kmd-radius-lg); background: var(--kmd-color-surface-1); box-shadow: 0 1rem 2.5rem rgb(0 0 0 / 10%); }
.practical-callout { border-left: .25rem solid var(--kmd-color-warning); }
.related-content { border-left: .25rem solid var(--kmd-color-indigo); }
.download-pending { border-left: .25rem solid var(--kmd-color-accent); }
.resource-grid { display: grid; gap: 1rem; }
.resource-grid section { padding-block: 1.5rem; border-top: 1px solid var(--kmd-color-border); }
.empty-state { color: var(--kmd-color-text-muted); }

.site-footer { margin-top: var(--kmd-space-section); padding-block: clamp(4rem, 8vw, 6.25rem) 2rem; border-top: 1px solid rgb(255 255 255 / 7%); background: linear-gradient(to bottom, rgb(22 24 29 / 40%), transparent); color: var(--kmd-color-text-muted); }
.footer-grid { display: grid; grid-template-columns: minmax(0, 1.35fr) minmax(10rem, .65fr) minmax(15rem, 1fr); gap: clamp(2.5rem, 6vw, 5rem); align-items: start; }
.footer-brand p { max-width: 24rem; }
.footer-nav { display: flex; flex-direction: column; gap: .8rem; }
.footer-status { display: flex; justify-content: flex-end; gap: .75rem; text-align: left; }
.footer-status p { margin: 0; }
.footer-status strong { color: var(--kmd-color-text); font-size: .75rem; letter-spacing: .1em; }
.status-dot { width: .65rem; height: .65rem; flex: 0 0 auto; margin-top: .45rem; border: 2px solid var(--kmd-color-warning); border-radius: 50%; }
.footer-baseline { display: flex; justify-content: space-between; gap: 2rem; margin-top: 4rem; padding-top: 1.5rem; border-top: 1px solid var(--kmd-color-border); font-size: .75rem; }

@media (max-width: 64rem) {
  .hero { min-height: auto; }
  .hero-grid { grid-template-columns: 1fr; }
  .hero-content { max-width: 52rem; }
  .system-visual { min-height: 27rem; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-status { justify-content: flex-start; }
}

@media (max-width: 48rem) {
  .header-inner { min-height: auto; align-items: flex-start; flex-direction: column; padding-block: .8rem 1rem; gap: .65rem; }
  .brand-logo { width: 5.75rem; }
  .site-nav { width: 100%; justify-content: flex-start; gap: .7rem 1.35rem; padding-top: .65rem; border-top: 1px solid var(--kmd-color-border); }
  .site-nav a { min-height: 2.75rem; display: inline-flex; align-items: center; }
  .card-grid, .footer-grid, .topics-section { grid-template-columns: 1fr; }
  .section-heading, .cta-block { align-items: flex-start; flex-direction: column; }
  .system-visual { min-height: 23rem; }
  .visual-orbit--outer { width: 19rem; height: 19rem; }
  .visual-orbit--inner { width: 12.5rem; height: 12.5rem; }
  .footer-baseline { flex-direction: column; gap: .5rem; }
}

@media (max-width: 28rem) {
  .shell { width: min(calc(100% - 1.25rem), var(--kmd-shell-max)); }
  .surface-name { padding-left: .65rem; font-size: .66rem; }
  .button-row, .button { width: 100%; }
  h1 { overflow-wrap: anywhere; }
  .system-visual { min-height: 20rem; }
  .visual-orbit--outer { width: 16.5rem; height: 16.5rem; }
  .visual-orbit--inner { width: 11rem; height: 11rem; }
  .visual-node { min-width: 5.3rem; padding: .5rem; font-size: .58rem; }
  .visual-node--signal { left: 4%; }
  .visual-node--context { right: 3%; }
  .visual-node--decision { left: 10%; }
  .visual-core { width: 7rem; }
  .card { padding: 1.4rem; border-radius: var(--kmd-radius-lg); }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; }
}

@media (forced-colors: active) {
  .button, .card, .system-visual, .diagram, .cta-block { border: 1px solid CanvasText; }
  .card-accent, .cta-block::before { background: CanvasText; }
}