/* Hallmark · macrostructure: Ecosystem Index · genre: modern-minimal · theme: Cobalt · pre-emit critique: P5 H5 E4 S5 R5 V4 */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500;600&family=Space+Grotesk:wght@400;500;600;700&display=swap');

:root {
  --color-paper: oklch(97.4% 0.007 245);
  --color-paper-deep: oklch(94.9% 0.011 244);
  --color-paper-warm: oklch(98.4% 0.004 245);
  --color-ink: oklch(18.8% 0.033 255);
  --color-ink-soft: oklch(34% 0.028 255);
  --color-muted: oklch(53.5% 0.025 250);
  --color-muted-light: oklch(69.5% 0.021 250);
  --color-rule: oklch(86.5% 0.019 246);
  --color-rule-strong: oklch(76.5% 0.028 249);
  --color-accent: oklch(58.5% 0.205 254);
  --color-accent-dark: oklch(43.5% 0.167 254);
  --color-accent-soft: oklch(91.6% 0.048 252);
  --color-navy: oklch(22.5% 0.047 255);
  --color-navy-2: oklch(27.6% 0.054 255);
  --color-navy-rule: oklch(40% 0.047 255);
  --color-header-surface: oklch(97.4% 0.007 245 / 0.9);
  --color-navy-copy: oklch(81% 0.022 252);
  --color-navy-copy-strong: oklch(87% 0.014 252);
  --color-shadow: oklch(18.8% 0.033 255);
  --color-white: oklch(100% 0 0);
  --color-yes: oklch(47.5% 0.131 152);
  --color-yes-soft: oklch(91% 0.042 151);
  --color-no: oklch(53% 0.105 26);
  --color-no-soft: oklch(92% 0.037 25);
  --color-unknown: oklch(52% 0.064 80);
  --color-unknown-soft: oklch(93% 0.043 86);
  --color-unverified: oklch(48% 0.076 309);
  --color-unverified-soft: oklch(93% 0.035 309);
  --font-display: 'Space Grotesk', 'Arial', sans-serif;
  --font-body: 'Inter', 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Cascadia Mono', monospace;
  --space-2xs: 0.25rem;
  --space-xs: 0.5rem;
  --space-sm: 0.75rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4.5rem;
  --space-4xl: 7rem;
  --radius-sm: 6px;
  --radius-md: 10px;
  --shadow-soft: 0 1px 0 oklch(18.8% 0.033 255 / 0.04), 0 14px 34px oklch(18.8% 0.033 255 / 0.045);
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-in: cubic-bezier(0.55, 0, 1, 0.45);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --dur-fast: 140ms;
  --dur-base: 220ms;
  --dur-slow: 420ms;
  --content-width: 1240px;
}

* { box-sizing: border-box; }
html { overflow-x: clip; scroll-behavior: smooth; background: var(--color-paper); }
body { margin: 0; min-width: 320px; overflow-x: clip; background: var(--color-paper); color: var(--color-ink); font-family: var(--font-body); font-size: 1rem; line-height: 1.55; -webkit-font-smoothing: antialiased; }
body.menu-open { overflow: hidden; }
a { color: inherit; text-decoration: none; }
button, input, select { font: inherit; }
button { cursor: pointer; }
img, svg { display: block; max-width: 100%; }
::selection { color: var(--color-white); background: var(--color-accent); }

.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
.shell { width: min(calc(100% - 3rem), var(--content-width)); margin-inline: auto; }
.skip-link { position: fixed; z-index: 30; top: var(--space-sm); left: var(--space-sm); transform: translateY(-180%); padding: var(--space-xs) var(--space-sm); border-radius: var(--radius-sm); background: var(--color-ink); color: var(--color-white); transition: transform var(--dur-fast) var(--ease-out); }
.skip-link:focus { transform: translateY(0); }
.eyebrow { display: inline-flex; align-items: center; gap: var(--space-xs); color: var(--color-muted); font-family: var(--font-mono); font-size: 0.68rem; font-weight: 500; letter-spacing: 0.13em; line-height: 1.3; text-transform: uppercase; }
.eyebrow::before { width: 0.35rem; height: 0.35rem; border-radius: 50%; background: var(--color-accent); content: ''; }
.eyebrow--light { color: var(--color-muted-light); }
.eyebrow--light::before { background: var(--color-accent); }
.muted { color: var(--color-muted); }

.site-header { position: relative; z-index: 10; border-bottom: 1px solid var(--color-rule); background: var(--color-header-surface); backdrop-filter: blur(16px); }
.site-header__inner { display: flex; min-height: 72px; align-items: center; gap: var(--space-lg); }
.brand { display: inline-flex; align-items: center; gap: var(--space-sm); font-family: var(--font-display); font-size: 1.05rem; font-weight: 600; letter-spacing: -0.035em; white-space: nowrap; }
.brand-mark { position: relative; display: grid; width: 1.4rem; height: 1.4rem; grid-template: repeat(2, 1fr) / repeat(2, 1fr); gap: 2px; transform: rotate(45deg); }
.brand-mark span { display: block; background: var(--color-accent); }
.brand-mark span:nth-child(2) { opacity: 0.62; }
.brand-mark span:nth-child(3) { opacity: 0.42; }
.brand-mark span:nth-child(4) { opacity: 0.82; }
.site-nav { display: flex; align-items: center; gap: var(--space-xl); margin-left: auto; }
.site-nav a { position: relative; padding-block: var(--space-xs); color: var(--color-muted); font-size: 0.86rem; font-weight: 500; white-space: nowrap; }
.site-nav a::after { position: absolute; right: 0; bottom: -1px; left: 0; height: 2px; transform: scaleX(0); transform-origin: right; background: var(--color-accent); content: ''; transition: transform var(--dur-base) var(--ease-out); }
.site-nav a:hover, .site-nav a:focus-visible, .site-nav a.is-current { color: var(--color-ink); }
.site-nav a:hover::after, .site-nav a:focus-visible::after, .site-nav a.is-current::after { transform: scaleX(1); transform-origin: left; }
.snapshot-chip { display: inline-flex; align-items: center; gap: var(--space-xs); margin-left: var(--space-lg); padding: var(--space-xs) var(--space-sm); border: 1px solid var(--color-rule); border-radius: var(--radius-sm); color: var(--color-muted); font-family: var(--font-mono); font-size: 0.62rem; letter-spacing: 0.045em; white-space: nowrap; }
.snapshot-chip__dot { width: 0.4rem; height: 0.4rem; border-radius: 50%; background: var(--color-yes); box-shadow: 0 0 0 3px var(--color-yes-soft); }
.menu-toggle { display: none; width: 2.5rem; height: 2.5rem; padding: 0.6rem; border: 1px solid var(--color-rule); border-radius: var(--radius-sm); background: transparent; }
.menu-toggle__line { display: block; width: 100%; height: 1px; margin: 0.32rem 0; background: var(--color-ink); transition: transform var(--dur-fast) var(--ease-out), opacity var(--dur-fast) var(--ease-out); }
.menu-toggle[aria-expanded="true"] .menu-toggle__line:first-of-type { transform: translateY(0.16rem) rotate(45deg); }
.menu-toggle[aria-expanded="true"] .menu-toggle__line:last-of-type { transform: translateY(-0.16rem) rotate(-45deg); }

h1, h2, h3, p, dl, dd, dt, ul, ol { margin: 0; }
h1, h2, h3 { font-family: var(--font-display); font-style: normal; font-weight: 600; letter-spacing: -0.055em; line-height: 1.05; overflow-wrap: anywhere; }
h1 { font-size: clamp(3.2rem, 7vw, 5.45rem); }
h2 { font-size: clamp(2rem, 4vw, 3.5rem); }
h3 { font-size: 1.1rem; letter-spacing: -0.035em; }
p { color: var(--color-ink-soft); }
.lede { max-width: 34rem; font-size: clamp(1.05rem, 1.5vw, 1.24rem); line-height: 1.55; }
.button { display: inline-flex; min-height: 42px; align-items: center; justify-content: center; gap: var(--space-sm); padding: 0.68rem 1rem; border: 1px solid transparent; border-radius: var(--radius-sm); font-size: 0.82rem; font-weight: 600; line-height: 1; text-align: center; white-space: nowrap; transition: color var(--dur-fast) var(--ease-out), background-color var(--dur-fast) var(--ease-out), border-color var(--dur-fast) var(--ease-out), transform var(--dur-fast) var(--ease-out); }
.button:hover { transform: translateY(-1px); }
.button:active { transform: translateY(0); }
.button--primary { background: var(--color-accent); color: var(--color-white); }
.button--primary:hover, .button--primary:focus-visible { background: var(--color-accent-dark); }
.button--subtle { border-color: var(--color-rule-strong); background: transparent; color: var(--color-ink); }
.button--subtle:hover, .button--subtle:focus-visible { border-color: var(--color-accent); background: var(--color-accent-soft); color: var(--color-accent-dark); }
.button--full { width: 100%; }
.quiet-link, .text-link, .arrow-link, .light-link { font-size: 0.82rem; font-weight: 600; }
.quiet-link, .text-link, .arrow-link { color: var(--color-accent-dark); }
.quiet-link:hover, .quiet-link:focus-visible, .text-link:hover, .text-link:focus-visible, .arrow-link:hover, .arrow-link:focus-visible { color: var(--color-accent); }
.arrow-link { display: inline-flex; align-items: center; gap: var(--space-sm); }
.light-link { display: inline-flex; align-items: center; gap: var(--space-sm); color: var(--color-white); }
.light-link:hover, .light-link:focus-visible { color: var(--color-accent-soft); }

:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 3px; }

.home-intro { display: grid; min-height: 580px; grid-template-columns: minmax(0, 1fr) minmax(320px, 0.72fr); align-items: center; gap: var(--space-4xl); padding-block: var(--space-4xl) var(--space-3xl); }
.home-intro__copy { display: grid; max-width: 50rem; gap: var(--space-lg); }
.home-intro h1 span, .directory-hero h1 span, .compare-hero h1 span, .method-hero h1 span, .changes-hero h1 span { color: var(--color-accent-dark); }
.intro-actions { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-lg); margin-top: var(--space-sm); }
.snapshot-panel { min-height: 310px; padding: var(--space-xl); border: 1px solid var(--color-rule-strong); background: var(--color-paper-warm); box-shadow: var(--shadow-soft); }
.snapshot-panel__header { display: flex; align-items: center; justify-content: space-between; padding-bottom: var(--space-xl); border-bottom: 1px solid var(--color-rule); }
.snapshot-panel__mark { display: grid; width: 2.1rem; height: 2.1rem; place-items: center; border: 1px solid var(--color-rule-strong); color: var(--color-accent-dark); font-family: var(--font-mono); font-size: 0.64rem; }
.snapshot-panel__metrics { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-md); padding-block: var(--space-2xl); }
.snapshot-panel__metrics div { display: grid; gap: var(--space-xs); }
.snapshot-panel__metrics strong { color: var(--color-ink); font-family: var(--font-display); font-size: clamp(2rem, 4vw, 3.2rem); font-weight: 500; letter-spacing: -0.08em; line-height: 0.9; }
.snapshot-panel__metrics span { color: var(--color-muted); font-size: 0.68rem; line-height: 1.35; }
.snapshot-panel > p { padding-top: var(--space-lg); border-top: 1px solid var(--color-rule); color: var(--color-muted); font-size: 0.8rem; }
.home-featured { padding-bottom: var(--space-4xl); }
.section-heading { display: grid; grid-template-columns: minmax(0, 1fr) minmax(240px, 0.58fr); align-items: end; gap: var(--space-2xl); padding-bottom: var(--space-xl); border-bottom: 1px solid var(--color-rule); }
.section-heading h2 { margin-top: var(--space-sm); }
.section-heading > p { max-width: 28rem; justify-self: end; color: var(--color-muted); font-size: 0.9rem; }
.provider-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: var(--space-md); }
.provider-grid--featured { margin-top: var(--space-xl); }
.provider-card { position: relative; display: flex; min-width: 0; flex-direction: column; padding: var(--space-lg); border: 1px solid var(--color-rule); background: var(--color-paper-warm); transition: border-color var(--dur-base) var(--ease-out), box-shadow var(--dur-base) var(--ease-out), transform var(--dur-base) var(--ease-out); }
.provider-card:hover { border-color: var(--color-rule-strong); box-shadow: var(--shadow-soft); transform: translateY(-2px); }
.provider-card--featured { min-height: 430px; }
.provider-card__top { display: flex; min-width: 0; align-items: flex-start; gap: var(--space-sm); }
.provider-card__top--detail { gap: var(--space-md); }
.monogram { display: grid; width: 2.25rem; height: 2.25rem; flex: 0 0 auto; place-items: center; border: 1px solid var(--color-rule-strong); background: var(--color-accent-soft); color: var(--color-accent-dark); font-family: var(--font-mono); font-size: 0.68rem; font-weight: 600; }
.monogram--large { width: 3.5rem; height: 3.5rem; font-size: 0.85rem; }
.provider-card__identity { min-width: 0; flex: 1; }
.provider-card__status { display: flex; min-height: 1.25rem; align-items: center; gap: var(--space-xs); margin-bottom: var(--space-xs); }
.provider-card h3 { font-size: 1.28rem; }
.provider-card h3 a:hover, .provider-card h3 a:focus-visible { color: var(--color-accent-dark); }
.positioning { margin-top: 0.22rem; color: var(--color-muted); font-size: 0.75rem; line-height: 1.35; }
.provider-card__summary { display: -webkit-box; overflow: hidden; min-height: 3.8em; margin-top: var(--space-lg); -webkit-box-orient: vertical; -webkit-line-clamp: 3; color: var(--color-ink-soft); font-size: 0.84rem; line-height: 1.5; }
.provider-card__tags, .detail-tags { display: flex; flex-wrap: wrap; gap: var(--space-xs); min-height: 1.4rem; margin-top: var(--space-md); }
.tag { display: inline-flex; align-items: center; min-height: 1.4rem; padding: 0.22rem 0.42rem; border: 1px solid var(--color-rule); color: var(--color-muted); font-family: var(--font-mono); font-size: 0.6rem; line-height: 1; text-transform: lowercase; }
.field-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); margin-top: var(--space-lg); border-top: 1px solid var(--color-rule); }
.field { min-width: 0; padding: 0.58rem 0.65rem 0.58rem 0; border-bottom: 1px solid var(--color-rule); }
.field:nth-child(odd) { padding-right: var(--space-sm); }
.field:nth-child(even) { padding-left: var(--space-sm); border-left: 1px solid var(--color-rule); }
.field dt { color: var(--color-muted); font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.015em; line-height: 1.25; }
.field dd { min-width: 0; margin-top: 0.3rem; color: var(--color-ink); font-size: 0.75rem; line-height: 1.35; overflow-wrap: anywhere; }
.field-note { display: block; margin-top: 0.18rem; color: var(--color-muted); font-size: 0.68rem; font-style: normal; }
.pricing-value { overflow-wrap: anywhere; }
.provider-card__footer { display: flex; align-items: center; justify-content: space-between; gap: var(--space-xs); margin-top: auto; padding-top: var(--space-lg); }
.evidence-label { display: inline-flex; align-items: center; width: fit-content; padding: 0.25rem 0.38rem; border: 1px solid var(--color-rule); color: var(--color-muted); font-family: var(--font-mono); font-size: 0.58rem; line-height: 1; white-space: nowrap; }
.evidence-label--implementation { border-color: var(--color-yes-soft); color: var(--color-yes); }
.evidence-label--commercial { border-color: var(--color-accent-soft); color: var(--color-accent-dark); }
.status { display: inline-flex; max-width: 100%; align-items: center; gap: 0.36rem; color: var(--color-ink-soft); font-size: 0.73rem; line-height: 1.2; white-space: nowrap; }
.status--compact { color: var(--color-muted); font-family: var(--font-mono); font-size: 0.58rem; letter-spacing: 0.01em; text-transform: uppercase; }
.status-dot { width: 0.42rem; height: 0.42rem; flex: 0 0 auto; border-radius: 50%; background: var(--color-muted-light); }
.status--yes .status-dot { background: var(--color-yes); box-shadow: 0 0 0 3px var(--color-yes-soft); }
.status--no .status-dot { background: var(--color-no); box-shadow: 0 0 0 3px var(--color-no-soft); }
.status--unknown .status-dot { background: var(--color-unknown); box-shadow: 0 0 0 3px var(--color-unknown-soft); }
.status--unverified .status-dot { background: var(--color-unverified); box-shadow: 0 0 0 3px var(--color-unverified-soft); }
.status--yes { color: var(--color-yes); }
.status--no { color: var(--color-no); }
.status--unknown { color: var(--color-unknown); }
.status--unverified { color: var(--color-unverified); }
.value-list { display: flex; flex-wrap: wrap; gap: 0.2rem 0.45rem; }
.value-list span + span::before { content: '·'; margin-right: 0.45rem; color: var(--color-muted-light); }
.section-more { display: flex; justify-content: flex-end; padding-top: var(--space-xl); }

.insight-panel, .method-boundaries, .changes-note { background: var(--color-navy); color: var(--color-white); }
.insight-panel { padding-block: var(--space-4xl); }
.insight-panel__inner { display: grid; grid-template-columns: minmax(280px, 0.62fr) minmax(0, 1fr); gap: var(--space-4xl); }
.insight-panel__lead { display: grid; align-content: start; gap: var(--space-lg); }
.insight-panel h2 { color: var(--color-white); }
.insight-panel__lead p, .insight-item p { color: var(--color-navy-copy); }
.insight-panel__grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: var(--space-lg); }
.insight-item { padding-top: var(--space-sm); border-top: 1px solid var(--color-navy-rule); }
.insight-item__number { display: block; margin-bottom: var(--space-lg); color: var(--color-accent-soft); font-family: var(--font-mono); font-size: 0.65rem; }
.insight-item h3 { margin-bottom: var(--space-sm); color: var(--color-white); font-size: 1rem; }
.insight-item p { font-size: 0.78rem; line-height: 1.6; }
.insight-item a { color: var(--color-white); text-decoration: underline; text-decoration-color: var(--color-navy-rule); text-underline-offset: 0.18em; }
.insight-item a:hover, .insight-item a:focus-visible { color: var(--color-accent-soft); }
.evidence-key { display: inline-block; margin-bottom: 0.25rem; color: var(--color-white); font-family: var(--font-mono); font-size: 0.62rem; }
.evidence-key--implementation::before, .evidence-key--commercial::before { display: inline-block; width: 0.38rem; height: 0.38rem; margin-right: 0.4rem; border-radius: 50%; background: var(--color-yes); content: ''; }
.evidence-key--commercial::before { background: var(--color-accent); }
.home-method { display: grid; grid-template-columns: minmax(0, 0.78fr) minmax(320px, 1fr); gap: var(--space-4xl); padding-block: var(--space-4xl); }
.home-method__copy { display: grid; align-content: start; gap: var(--space-lg); }
.home-method__copy p { max-width: 34rem; color: var(--color-muted); }
.home-method__links { border-top: 1px solid var(--color-rule); }
.link-row { display: grid; grid-template-columns: 2rem minmax(0, 1fr) auto; align-items: center; gap: var(--space-sm); min-height: 64px; border-bottom: 1px solid var(--color-rule); color: var(--color-ink); }
.link-row span:first-child { color: var(--color-muted); font-family: var(--font-mono); font-size: 0.65rem; }
.link-row strong { font-family: var(--font-display); font-size: 1rem; font-weight: 500; }
.link-row:hover strong, .link-row:focus-visible strong { color: var(--color-accent-dark); }

.site-footer { border-top: 1px solid var(--color-rule); background: var(--color-paper-deep); }
.site-footer__inner { display: flex; align-items: flex-start; justify-content: space-between; gap: var(--space-xl); padding-block: var(--space-2xl); }
.brand--footer { font-size: 0.9rem; }
.site-footer p { margin-top: var(--space-sm); color: var(--color-muted); font-size: 0.72rem; }
.footer-meta { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: var(--space-lg); color: var(--color-muted); font-family: var(--font-mono); font-size: 0.68rem; }
.footer-meta a:hover, .footer-meta a:focus-visible { color: var(--color-accent-dark); }

.directory-hero, .compare-hero, .method-hero, .changes-hero { display: grid; grid-template-columns: minmax(0, 1fr) minmax(280px, 0.58fr); align-items: end; gap: var(--space-4xl); padding-block: var(--space-4xl) var(--space-3xl); }
.directory-hero > p, .method-hero > p, .changes-hero > p { max-width: 31rem; justify-self: end; color: var(--color-muted); font-size: 1rem; }
.directory { padding-bottom: var(--space-4xl); }
.directory-toolbar { display: grid; grid-template-columns: minmax(220px, 1.6fr) repeat(6, minmax(120px, 0.72fr)) auto; gap: var(--space-sm); align-items: end; padding: var(--space-lg); border: 1px solid var(--color-rule); background: var(--color-paper-warm); }
.directory-search, .filter-block { min-width: 0; }
.directory-toolbar label { display: block; margin-bottom: var(--space-xs); color: var(--color-muted); font-family: var(--font-mono); font-size: 0.68rem; letter-spacing: 0.03em; line-height: 1.2; }
.search-input { position: relative; display: flex; align-items: center; }
.search-input > span { position: absolute; left: 0.72rem; color: var(--color-muted); font-size: 1rem; pointer-events: none; }
.search-input input, .directory-toolbar select { width: 100%; min-height: 40px; border: 1px solid var(--color-rule-strong); border-radius: var(--radius-sm); background: var(--color-paper); color: var(--color-ink); font-size: 0.78rem; }
.search-input input { padding: 0.62rem 2rem; }
.directory-toolbar select { padding: 0.62rem 0.55rem; }
.search-input input:hover, .directory-toolbar select:hover { border-color: var(--color-accent); }
.input-clear { position: absolute; right: 0.35rem; display: none; width: 1.7rem; height: 1.7rem; padding: 0; border: 0; background: transparent; color: var(--color-muted); font-size: 1.1rem; }
.input-clear.is-visible { display: block; }
.directory-toolbar > .button { min-height: 40px; }
.directory-summary { display: flex; align-items: baseline; justify-content: space-between; gap: var(--space-lg); padding-block: var(--space-xl) var(--space-md); }
.directory-summary h2 { font-size: 1.35rem; }
.directory-summary p { color: var(--color-muted); font-size: 0.76rem; }
.provider-grid--directory { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.compare-control { display: inline-flex; align-items: center; gap: 0.35rem; margin-left: auto; color: var(--color-muted); font-family: var(--font-mono); font-size: 0.58rem; line-height: 1; white-space: nowrap; }
.compare-control input { width: 1rem; height: 1rem; margin: 0; accent-color: var(--color-accent); }
.no-results { padding: var(--space-4xl) var(--space-lg); border: 1px dashed var(--color-rule-strong); text-align: center; }
.no-results__mark { display: block; margin-bottom: var(--space-md); color: var(--color-accent); font-family: var(--font-mono); font-size: 2.5rem; }
.no-results h3 { margin-bottom: var(--space-xs); }
.no-results p { margin-bottom: var(--space-lg); color: var(--color-muted); }

.detail-hero { padding-block: var(--space-xl) var(--space-3xl); }
.breadcrumbs { display: flex; align-items: center; gap: var(--space-sm); margin-bottom: var(--space-3xl); color: var(--color-muted); font-family: var(--font-mono); font-size: 0.63rem; }
.breadcrumbs a:hover, .breadcrumbs a:focus-visible { color: var(--color-accent-dark); }
.detail-hero__grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(280px, 0.46fr); gap: var(--space-4xl); align-items: start; }
.detail-hero h1 { margin-top: var(--space-sm); font-size: clamp(3rem, 7vw, 5rem); }
.detail-status-note { color: var(--color-muted); font-size: 0.72rem; }
.detail-lede { max-width: 48rem; margin-top: var(--space-xl); font-size: 1.08rem; }
.detail-aside { padding: var(--space-lg); border: 1px solid var(--color-rule-strong); background: var(--color-paper-warm); }
.detail-aside dl { margin-top: var(--space-lg); border-top: 1px solid var(--color-rule); }
.detail-aside dl > div { display: grid; grid-template-columns: 1fr auto; gap: var(--space-md); padding-block: var(--space-sm); border-bottom: 1px solid var(--color-rule); }
.detail-aside dt { color: var(--color-muted); font-family: var(--font-mono); font-size: 0.6rem; }
.detail-aside dd { color: var(--color-ink); font-size: 0.75rem; text-align: right; }
.detail-aside__note { margin-top: var(--space-lg); font-size: 0.76rem; }
.detail-aside .button { margin-top: var(--space-lg); }
.detail-section { padding-block: var(--space-3xl); border-top: 1px solid var(--color-rule); }
.detail-section .field-grid { margin-top: var(--space-xl); }
.detail-section--split { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--space-4xl); }
.detail-column > h2 { margin-top: var(--space-sm); font-size: clamp(1.8rem, 3vw, 2.8rem); }
.capability-list { margin-top: var(--space-xl); border-top: 1px solid var(--color-rule); }
.capability-row { display: flex; align-items: center; justify-content: space-between; min-height: 52px; border-bottom: 1px solid var(--color-rule); }
.capability-row > span:first-child { font-family: var(--font-mono); font-size: 0.72rem; }
.detail-block { margin-top: var(--space-xl); padding-top: var(--space-md); border-top: 1px solid var(--color-rule); }
.detail-block h3 { margin-bottom: var(--space-sm); font-size: 0.8rem; color: var(--color-muted); font-family: var(--font-mono); font-weight: 500; letter-spacing: 0.04em; text-transform: uppercase; }
.detail-block p { font-size: 0.86rem; }
.protocol-list { display: flex; flex-wrap: wrap; gap: var(--space-xs); }
.protocol-list span { padding: 0.36rem 0.48rem; border: 1px solid var(--color-rule); font-family: var(--font-mono); font-size: 0.62rem; }
.stacked-fields { margin-top: var(--space-xl); border-top: 1px solid var(--color-rule); }
.stacked-fields .field { display: flex; min-height: 52px; align-items: center; justify-content: space-between; gap: var(--space-lg); padding-block: var(--space-sm); border-bottom: 1px solid var(--color-rule); }
.stacked-fields .field:nth-child(even) { padding-left: 0; border-left: 0; }
.stacked-fields .field dd { margin-top: 0; text-align: right; }
.evidence-section { background: var(--color-paper-deep); }
.evidence-list, .source-list { display: grid; gap: var(--space-lg); margin-top: var(--space-xl); padding: 0; list-style: none; }
.evidence-list li { padding-top: var(--space-sm); border-top: 1px solid var(--color-rule-strong); }
.evidence-entry__top { display: flex; align-items: center; gap: var(--space-sm); color: var(--color-accent-dark); font-family: var(--font-mono); font-size: 0.62rem; }
.evidence-entry__rule { width: 2rem; height: 1px; background: var(--color-accent); }
.evidence-list h3 { margin-top: var(--space-sm); font-size: 1.05rem; }
.evidence-list p { margin-top: var(--space-xs); font-size: 0.82rem; }
.source-list li { display: grid; grid-template-columns: 7rem minmax(0, 1fr); gap: var(--space-sm); padding-top: var(--space-sm); border-top: 1px solid var(--color-rule-strong); }
.source-kind { color: var(--color-muted); font-family: var(--font-mono); font-size: 0.68rem; text-transform: uppercase; }
.source-list p { margin-top: 0.25rem; color: var(--color-muted); font-size: 0.72rem; }
.source-note { margin-top: var(--space-xl); color: var(--color-muted); font-size: 0.72rem; }
.detail-history { padding-block: var(--space-xl); }
.detail-history details { border-top: 1px solid var(--color-rule); border-bottom: 1px solid var(--color-rule); }
.detail-history summary { display: flex; align-items: center; justify-content: space-between; gap: var(--space-lg); padding-block: var(--space-lg); cursor: pointer; list-style: none; }
.detail-history summary::-webkit-details-marker { display: none; }
.detail-history summary strong { display: block; margin-top: var(--space-xs); font-family: var(--font-display); font-size: 1.15rem; letter-spacing: -0.035em; }
.details-toggle { color: var(--color-accent-dark); font-family: var(--font-mono); font-size: 1.35rem; font-weight: 300; }
.detail-history details[open] .details-toggle { transform: rotate(45deg); }
.details-content { padding: 0 0 var(--space-xl); }
.details-content > p { font-size: 0.76rem; }
.history-list { display: grid; gap: var(--space-sm); margin-top: var(--space-lg); padding: 0; list-style: none; }
.history-list li { display: grid; grid-template-columns: 7rem minmax(0, 1fr); gap: var(--space-md); padding-top: var(--space-sm); border-top: 1px solid var(--color-rule); font-size: 0.76rem; }
.history-list li > span { color: var(--color-muted); font-family: var(--font-mono); font-size: 0.62rem; }
.history-list strong { font-weight: 600; }
.detail-next { display: flex; justify-content: space-between; gap: var(--space-lg); padding-block: var(--space-xl) var(--space-4xl); }

.compare-hero__aside { display: grid; gap: var(--space-lg); justify-self: end; max-width: 30rem; }
.compare-hero__aside p { color: var(--color-muted); }
.copy-feedback { min-height: 1.1rem; color: var(--color-yes); font-family: var(--font-mono); font-size: 0.62rem; }
.compare-section { padding-bottom: var(--space-4xl); }
.compare-toolbar { display: flex; align-items: end; justify-content: space-between; gap: var(--space-lg); padding-bottom: var(--space-xl); border-bottom: 1px solid var(--color-rule); }
.compare-toolbar h2 { margin-top: var(--space-sm); font-size: clamp(1.8rem, 3vw, 2.5rem); }
.compare-empty { display: grid; justify-items: start; gap: var(--space-md); padding-block: var(--space-4xl); }
.compare-empty__mark { display: grid; width: 2.5rem; height: 2.5rem; place-items: center; border: 1px solid var(--color-rule-strong); color: var(--color-accent); font-family: var(--font-mono); font-size: 1.5rem; }
.compare-empty p { color: var(--color-muted); }
.compare-table-wrap { overflow-x: auto; padding-block: var(--space-xl); }
.compare-table { width: 100%; min-width: 760px; border-collapse: collapse; table-layout: fixed; }
.compare-table th, .compare-table td { min-width: 0; padding: var(--space-md); border-bottom: 1px solid var(--color-rule); text-align: left; vertical-align: top; font-size: 0.78rem; overflow-wrap: anywhere; }
.compare-table thead th { border-top: 1px solid var(--color-rule-strong); color: var(--color-ink); font-family: var(--font-display); font-size: 1rem; font-weight: 600; }
.compare-table thead th:first-child { width: 18%; color: var(--color-muted); font-family: var(--font-mono); font-size: 0.62rem; font-weight: 500; }
.compare-table tbody th { color: var(--color-muted); font-family: var(--font-mono); font-size: 0.72rem; font-weight: 500; }
.compare-table td { color: var(--color-ink-soft); }
.text-link--strong { color: var(--color-ink); font-family: var(--font-display); font-size: 1rem; font-weight: 600; }
.compare-note { display: grid; grid-template-columns: minmax(0, 0.7fr) minmax(0, 1fr); gap: var(--space-4xl); padding-block: var(--space-3xl); border-top: 1px solid var(--color-rule); }
.compare-note p { max-width: 33rem; color: var(--color-muted); }

.method-hero { padding-bottom: var(--space-4xl); }
.method-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--space-md); padding-bottom: var(--space-4xl); }
.method-card { min-height: 300px; padding: var(--space-xl); border: 1px solid var(--color-rule); background: var(--color-paper-warm); }
.method-card--wide { grid-column: span 2; min-height: 0; }
.method-card h2 { margin-top: var(--space-lg); font-size: clamp(1.65rem, 3vw, 2.55rem); }
.method-card > p { max-width: 48rem; margin-top: var(--space-lg); color: var(--color-ink-soft); }
.method-source { padding-top: var(--space-md); border-top: 1px solid var(--color-rule); font-size: 0.78rem; }
.method-source .text-link { font-size: inherit; }
.method-stat-line { display: flex; flex-wrap: wrap; gap: var(--space-xl); margin-top: var(--space-2xl); padding-top: var(--space-lg); border-top: 1px solid var(--color-rule); color: var(--color-muted); font-family: var(--font-mono); font-size: 0.68rem; }
.method-stat-line strong { margin-right: 0.3rem; color: var(--color-ink); font-family: var(--font-display); font-size: 1.6rem; font-weight: 500; }
.status-explainer { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: var(--space-md); margin-top: var(--space-xl); }
.status-explainer > div { display: grid; gap: var(--space-sm); padding-top: var(--space-sm); border-top: 1px solid var(--color-rule); }
.status-explainer p { color: var(--color-muted); font-size: 0.72rem; }
.method-boundaries { padding-block: var(--space-4xl); }
.method-boundaries__inner { display: grid; grid-template-columns: minmax(0, 0.7fr) minmax(0, 1fr); gap: var(--space-4xl); }
.method-boundaries h2 { margin-top: var(--space-lg); color: var(--color-white); }
.method-boundaries ul { display: grid; gap: var(--space-sm); padding: 0; list-style: none; }
.method-boundaries li { padding-top: var(--space-sm); border-top: 1px solid var(--color-navy-rule); color: var(--color-navy-copy); font-size: 0.83rem; }
.method-boundaries li::before { margin-right: var(--space-sm); color: var(--color-accent-soft); content: '—'; }
.method-footer { display: flex; align-items: center; justify-content: space-between; gap: var(--space-lg); padding-block: var(--space-2xl) var(--space-4xl); }
.method-footer p { color: var(--color-muted); font-size: 0.78rem; }

.changes-hero { padding-bottom: var(--space-4xl); }
.changes-section { padding-bottom: var(--space-4xl); }
.changes-summary { display: grid; grid-template-columns: minmax(0, 0.7fr) minmax(0, 1fr); gap: var(--space-4xl); padding-block: var(--space-xl); border-top: 1px solid var(--color-rule); border-bottom: 1px solid var(--color-rule); }
.changes-summary h2 { margin-top: var(--space-sm); font-size: clamp(1.7rem, 3vw, 2.6rem); }
.changes-summary p { color: var(--color-muted); font-size: 0.84rem; }
.changes-summary code { padding: 0.15rem 0.3rem; background: var(--color-paper-deep); color: var(--color-accent-dark); font-family: var(--font-mono); font-size: 0.68rem; }
.baseline-list { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0 var(--space-lg); padding: 0; list-style: none; }
.baseline-list li { display: grid; grid-template-columns: 2rem minmax(0, 1fr); align-items: baseline; gap: var(--space-sm); padding: var(--space-md) 0; border-bottom: 1px solid var(--color-rule); }
.baseline-list li > span { color: var(--color-muted); font-family: var(--font-mono); font-size: 0.62rem; }
.baseline-list strong { font-family: var(--font-display); font-size: 0.94rem; font-weight: 600; }
.baseline-list em { grid-column: 2; color: var(--color-muted); font-family: var(--font-mono); font-size: 0.58rem; font-style: normal; }
.changes-note { padding-block: var(--space-4xl); }
.changes-note h2 { max-width: 38rem; margin-top: var(--space-lg); color: var(--color-white); }
.changes-note p { max-width: 38rem; margin-top: var(--space-lg); color: var(--color-navy-copy); }

.not-found { display: grid; min-height: 60vh; align-content: center; justify-items: start; gap: var(--space-lg); padding-block: var(--space-4xl); }
.not-found h1 { max-width: 40rem; }
.not-found p { color: var(--color-muted); }
.not-found > div { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-lg); }

[hidden] { display: none !important; }
.compare-selection-bar { position: fixed; z-index: 12; right: var(--space-lg); bottom: var(--space-lg); left: var(--space-lg); display: flex; align-items: center; justify-content: space-between; gap: var(--space-lg); padding: 0.7rem 0.7rem 0.7rem var(--space-lg); border: 1px solid var(--color-navy-rule); background: var(--color-navy); color: var(--color-white); box-shadow: 0 14px 38px var(--color-shadow); }
.compare-selection-bar p { color: var(--color-navy-copy-strong); font-size: 0.78rem; }
.compare-selection-bar strong { color: var(--color-white); font-family: var(--font-display); }
.compare-selection-bar .button { background: var(--color-white); color: var(--color-ink); }
.compare-selection-bar .button:hover { background: var(--color-accent-soft); }

@media (max-width: 1100px) {
  .directory-toolbar { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .directory-search { grid-column: span 2; }
  .directory-toolbar > .button { grid-column: span 2; justify-self: start; }
  .provider-grid, .provider-grid--directory { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .provider-card--featured { min-height: 0; }
  .insight-panel__inner, .home-method { gap: var(--space-2xl); }
}

@media (max-width: 780px) {
  .shell { width: min(calc(100% - 2rem), var(--content-width)); }
  .site-header__inner { min-height: 64px; }
  .menu-toggle { display: block; order: 3; }
  .site-nav { position: absolute; top: calc(100% + 1px); right: 0; left: 0; display: none; flex-direction: column; align-items: stretch; gap: 0; padding: var(--space-sm) 1rem var(--space-md); border-bottom: 1px solid var(--color-rule); background: var(--color-paper); box-shadow: var(--shadow-soft); }
  .site-nav.is-open { display: flex; }
  .site-nav a { padding-block: var(--space-sm); border-bottom: 1px solid var(--color-rule); }
  .site-nav a:last-child { border-bottom: 0; }
  .site-nav a::after { bottom: 0; left: 0; width: 2rem; }
  .snapshot-chip { margin-left: auto; }
  .home-intro, .directory-hero, .compare-hero, .method-hero, .changes-hero { grid-template-columns: 1fr; gap: var(--space-2xl); min-height: 0; padding-block: var(--space-3xl); }
  .directory-hero > p, .method-hero > p, .changes-hero > p, .compare-hero__aside { justify-self: start; }
  .section-heading { grid-template-columns: 1fr; gap: var(--space-md); }
  .section-heading > p { justify-self: start; }
  .provider-grid, .provider-grid--directory { grid-template-columns: 1fr; }
  .insight-panel__inner, .home-method, .detail-hero__grid, .detail-section--split, .compare-note, .method-boundaries__inner, .changes-summary { grid-template-columns: 1fr; gap: var(--space-2xl); }
  .insight-panel__grid { grid-template-columns: 1fr; gap: var(--space-xl); }
  .home-featured, .directory, .compare-section, .method-grid, .changes-section { padding-bottom: var(--space-3xl); }
  .directory-toolbar { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .directory-search, .directory-toolbar > .button { grid-column: span 2; }
  .snapshot-panel { min-height: 0; }
  .detail-hero h1 { font-size: clamp(2.85rem, 12vw, 4.6rem); }
  .detail-aside { max-width: none; }
  .method-grid { grid-template-columns: 1fr; }
  .method-card--wide { grid-column: auto; }
  .status-explainer { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .baseline-list { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .method-footer, .site-footer__inner, .detail-next { align-items: flex-start; flex-direction: column; }
  .footer-meta { justify-content: flex-start; }
}

@media (max-width: 480px) {
  .brand { font-size: 0.96rem; }
  .snapshot-chip { display: none; }
  h1 { font-size: clamp(2.8rem, 14vw, 4rem); }
  .home-intro { padding-block: var(--space-2xl) var(--space-3xl); }
  .snapshot-panel__metrics { gap: var(--space-sm); }
  .snapshot-panel__metrics strong { font-size: 2.25rem; }
  .snapshot-panel__metrics span { font-size: 0.62rem; }
  .field-grid { grid-template-columns: 1fr; }
  .field:nth-child(even), .field:nth-child(odd) { padding-inline: 0; border-left: 0; }
  .provider-card__footer { align-items: flex-start; flex-direction: column; }
  .directory-toolbar { grid-template-columns: 1fr; }
  .directory-search, .directory-toolbar > .button { grid-column: auto; }
  .directory-summary { align-items: flex-start; flex-direction: column; gap: var(--space-xs); }
  .status-explainer, .baseline-list { grid-template-columns: 1fr; }
  .compare-toolbar { align-items: flex-start; flex-direction: column; }
  .compare-selection-bar { right: var(--space-xs); bottom: var(--space-xs); left: var(--space-xs); padding-left: var(--space-sm); }
  .compare-selection-bar p { font-size: 0.68rem; }
  .compare-selection-bar .button { padding-inline: 0.65rem; font-size: 0.72rem; }
  .source-list li, .history-list li { grid-template-columns: 1fr; gap: var(--space-xs); }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; }
}