@layer reset, tokens, base, layout, components, utilities;

@layer tokens {
  :root {
    --color-brand-50: #fff2f2;
    --color-brand-100: #ffe0e1;
    --color-brand-500: #d21f2b;
    --color-brand-600: #b5121b;
    --color-brand-700: #911019;
    --color-ink-950: #121619;
    --color-ink-800: #283036;
    --color-ink-650: #48545c;
    --color-ink-500: #68737a;
    --color-line: #dce1e4;
    --color-line-strong: #b8c0c5;
    --color-surface: #ffffff;
    --color-surface-subtle: #f5f7f7;
    --color-surface-dark: #171d21;
    --color-success: #177245;
    --color-success-bg: #eaf7ef;
    --color-warning: #8b5800;
    --color-warning-bg: #fff7e5;
    --color-error: #a20d19;
    --color-error-bg: #fff0f1;
    --color-info: #1e5b82;
    --color-info-bg: #edf7fc;

    --font-sans: Aptos, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --font-mono: "Cascadia Code", "SFMono-Regular", Consolas, monospace;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-md: clamp(1.0625rem, 1rem + 0.25vw, 1.1875rem);
    --font-size-lg: clamp(1.25rem, 1.1rem + 0.65vw, 1.625rem);
    --font-size-xl: clamp(1.75rem, 1.4rem + 1.2vw, 2.5rem);
    --font-size-2xl: clamp(2.35rem, 1.7rem + 2.4vw, 4.4rem);
    --line-tight: 1.05;
    --line-heading: 1.2;
    --line-body: 1.65;

    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;
    --space-24: 6rem;

    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.85rem;
    --radius-pill: 999px;
    --border: 1px solid var(--color-line);
    --border-strong: 1px solid var(--color-line-strong);
    --shadow-sm: 0 1px 2px rgb(18 22 25 / 8%);
    --shadow-md: 0 12px 35px rgb(18 22 25 / 10%);
    --shadow-focus: 0 0 0 3px rgb(210 31 43 / 25%);
    --max-width: 75rem;
    --content-width: 48rem;
    --header-height: 4.75rem;
    --transition-fast: 160ms ease;
    --transition-base: 240ms ease;
  }
}

@layer reset {
  *, *::before, *::after { box-sizing: border-box; }
  html { scroll-behavior: smooth; }
  body, h1, h2, h3, h4, p, figure, blockquote, dl, dd { margin: 0; }
  ul, ol { margin: 0; padding: 0; }
  img, picture, svg { display: block; max-width: 100%; }
  button, input, textarea, select { font: inherit; }
  button { cursor: pointer; }
  [hidden] { display: none !important; }
}

@layer base {
  html { color-scheme: light; scroll-padding-top: calc(var(--header-height) + var(--space-4)); }
  body { background: var(--color-surface); color: var(--color-ink-800); font-family: var(--font-sans); font-size: var(--font-size-base); line-height: var(--line-body); text-rendering: optimizeLegibility; }
  body.menu-open { overflow: hidden; }
  a { color: var(--color-brand-700); text-decoration-thickness: 0.08em; text-underline-offset: 0.18em; }
  a:hover { color: var(--color-brand-600); }
  h1, h2, h3, h4 { color: var(--color-ink-950); font-weight: 720; letter-spacing: -0.025em; line-height: var(--line-heading); text-wrap: balance; }
  h1 { font-size: var(--font-size-2xl); line-height: var(--line-tight); }
  h2 { font-size: var(--font-size-xl); }
  h3 { font-size: var(--font-size-lg); }
  p { text-wrap: pretty; }
  :focus-visible { border-radius: var(--radius-sm); outline: 2px solid var(--color-brand-600); outline-offset: 3px; }
  ::selection { background: var(--color-brand-100); color: var(--color-ink-950); }
}

@layer layout {
  .container { margin-inline: auto; max-width: var(--max-width); padding-inline: var(--space-5); width: 100%; }
  .section { padding-block: var(--space-16); }
  .section--subtle { background: var(--color-surface-subtle); }
  .section--dark { background: var(--color-surface-dark); color: #dce2e5; }
  .section--dark h2, .section--dark h3 { color: #fff; }
  .section-header { display: grid; gap: var(--space-4); margin-bottom: var(--space-10); max-width: 47rem; }
  .section-header p:not(.eyebrow) { color: var(--color-ink-650); font-size: var(--font-size-md); }
  .grid { display: grid; gap: var(--space-5); }
  .grid--2, .grid--3, .grid--4 { grid-template-columns: 1fr; }
  .content-layout { display: grid; gap: var(--space-10); }
  .prose { max-width: var(--content-width); }
  .prose > * + * { margin-top: var(--space-5); }
  .prose ul, .prose ol { padding-left: var(--space-6); }
  .stack > * + * { margin-top: var(--stack-space, var(--space-5)); }
}

@layer components {
  .skip-link { background: var(--color-ink-950); color: #fff; left: var(--space-4); padding: var(--space-3) var(--space-4); position: fixed; top: var(--space-3); transform: translateY(-160%); z-index: 1000; }
  .skip-link:focus { color: #fff; transform: translateY(0); }
  .icon { height: 1.1em; width: 1.1em; }
  .sr-only { clip: rect(0 0 0 0); clip-path: inset(50%); height: 1px; overflow: hidden; position: absolute; white-space: nowrap; width: 1px; }
  .eyebrow { color: var(--color-brand-700); font-family: var(--font-mono); font-size: var(--font-size-xs); font-weight: 700; letter-spacing: 0.11em; text-transform: uppercase; }
  .eyebrow--light { color: #ffd6d8; }

  .site-header { background: rgb(255 255 255 / 94%); border-bottom: var(--border); min-height: var(--header-height); position: sticky; top: 0; z-index: 100; }
  .site-header__inner { align-items: center; display: flex; gap: var(--space-4); min-height: var(--header-height); }
  .brand { align-items: center; color: var(--color-ink-950); display: inline-flex; gap: var(--space-3); margin-right: auto; text-decoration: none; }
  .brand:hover { color: var(--color-ink-950); }
  .brand__mark { align-items: center; background: var(--color-brand-600); border-radius: var(--radius-sm); color: #fff; display: inline-flex; font-size: 1.15rem; font-weight: 800; height: 2.45rem; justify-content: center; width: 2.45rem; }
  .brand__text { display: grid; line-height: 1.05; }
  .brand__text strong { font-size: 1.16rem; }
  .brand__text small { color: var(--color-ink-650); font-size: 0.61rem; letter-spacing: 0.04em; margin-top: 0.28rem; text-transform: uppercase; }
  .site-nav, .site-header__cta { display: none; }
  .site-nav__list { align-items: center; display: flex; gap: var(--space-2); }
  .site-nav a { border-radius: var(--radius-sm); color: var(--color-ink-800); display: block; font-size: var(--font-size-sm); font-weight: 650; padding: var(--space-2) var(--space-3); text-decoration: none; }
  .site-nav a:hover { background: var(--color-surface-subtle); color: var(--color-brand-700); }
  .icon-button { align-items: center; background: #fff; border: var(--border-strong); border-radius: var(--radius-md); color: var(--color-ink-950); display: inline-flex; height: 2.75rem; justify-content: center; padding: 0; width: 2.75rem; }
  .icon-button:hover { background: var(--color-surface-subtle); }
  .mobile-menu { background: #fff; bottom: 0; box-shadow: var(--shadow-md); max-width: 23rem; padding: var(--space-5); position: fixed; right: 0; top: 0; width: min(90vw, 23rem); z-index: 300; }
  .mobile-menu__top { align-items: center; border-bottom: var(--border); display: flex; justify-content: space-between; padding-bottom: var(--space-5); }
  .mobile-menu__list { display: grid; list-style: none; padding-block: var(--space-5); }
  .mobile-menu__list a { border-bottom: var(--border); color: var(--color-ink-950); display: block; font-size: 1.05rem; font-weight: 650; padding: var(--space-3) 0; text-decoration: none; }
  .mobile-menu__actions { display: grid; gap: var(--space-3); }
  .mobile-menu-backdrop { background: rgb(18 22 25 / 48%); inset: 0; position: fixed; z-index: 200; }

  .button { align-items: center; background: var(--color-brand-600); border: 1px solid var(--color-brand-600); border-radius: var(--radius-md); color: #fff; display: inline-flex; font-weight: 700; gap: var(--space-2); justify-content: center; min-height: 3rem; padding: 0.7rem 1.15rem; text-align: center; text-decoration: none; transition: background var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast); }
  .button:hover { background: var(--color-brand-700); border-color: var(--color-brand-700); color: #fff; transform: translateY(-1px); }
  .button:active { transform: translateY(0); }
  .button--secondary { background: #fff; border-color: var(--color-line-strong); color: var(--color-ink-950); }
  .button--secondary:hover { background: var(--color-surface-subtle); border-color: var(--color-ink-650); color: var(--color-ink-950); }
  .button--light { background: #fff; border-color: #fff; color: var(--color-brand-700); }
  .button--light:hover { background: var(--color-brand-50); border-color: var(--color-brand-50); color: var(--color-brand-700); }
  .button--ghost-light { background: transparent; border-color: rgb(255 255 255 / 55%); color: #fff; }
  .button--ghost-light:hover { background: rgb(255 255 255 / 10%); border-color: #fff; color: #fff; }
  .button--small { min-height: 2.55rem; padding: 0.5rem 0.85rem; }
  .button-group { align-items: stretch; display: flex; flex-direction: column; gap: var(--space-3); }

  .breadcrumbs { border-bottom: var(--border); font-size: var(--font-size-sm); }
  .breadcrumbs ol { display: flex; flex-wrap: wrap; gap: var(--space-2); list-style: none; padding-block: var(--space-3); }
  .breadcrumbs li:not(:last-child)::after { color: var(--color-ink-500); content: "/"; margin-left: var(--space-2); }
  .breadcrumbs a { color: var(--color-ink-650); }
  .breadcrumbs [aria-current] { color: var(--color-ink-950); font-weight: 650; }

  .hero { overflow: hidden; padding-block: var(--space-16); position: relative; }
  .hero::before { background-image: linear-gradient(var(--color-line) 1px, transparent 1px), linear-gradient(90deg, var(--color-line) 1px, transparent 1px); background-size: 3rem 3rem; content: ""; inset: 0 0 auto 52%; height: 100%; mask-image: linear-gradient(to right, transparent, black); opacity: 0.32; pointer-events: none; position: absolute; }
  .hero__grid { display: grid; gap: var(--space-10); position: relative; }
  .hero__content { display: grid; gap: var(--space-6); max-width: 50rem; }
  .hero__lead { color: var(--color-ink-650); font-size: var(--font-size-md); max-width: 42rem; }
  .hero__panel { align-content: start; background: var(--color-surface-dark); border-radius: var(--radius-lg); box-shadow: var(--shadow-md); color: #cbd2d6; display: grid; gap: var(--space-4); min-height: 21rem; overflow: hidden; padding: var(--space-8); position: relative; }
  .hero__panel::after { background: var(--color-brand-600); bottom: 0; content: ""; height: 0.3rem; left: 0; position: absolute; width: 42%; }
  .hero__panel h2 { color: #fff; font-size: var(--font-size-lg); }
  .hero__panel-index { color: #96a1a8; font-family: var(--font-mono); font-size: var(--font-size-xs); }
  .signal-grid { align-self: end; display: grid; gap: 0.35rem; grid-template-columns: repeat(6, 1fr); margin-top: var(--space-6); }
  .signal-grid i { background: var(--color-brand-500); border-radius: var(--radius-sm); height: 3rem; opacity: 0.35; }
  .signal-grid i:nth-child(2) { height: 5rem; opacity: 0.55; }
  .signal-grid i:nth-child(3) { height: 7rem; opacity: 0.8; }
  .signal-grid i:nth-child(4) { height: 4rem; opacity: 0.5; }
  .signal-grid i:nth-child(5) { height: 8rem; opacity: 1; }
  .signal-grid i:nth-child(6) { height: 5.5rem; opacity: 0.65; }

  .card { background: #fff; border: var(--border); border-radius: var(--radius-lg); display: grid; gap: var(--space-4); padding: var(--space-6); position: relative; transition: border-color var(--transition-base), box-shadow var(--transition-base), transform var(--transition-base); }
  .card:hover { border-color: var(--color-line-strong); box-shadow: var(--shadow-md); transform: translateY(-3px); }
  .card__link { color: var(--color-ink-950); text-decoration: none; }
  .card__link::after { content: ""; inset: 0; position: absolute; }
  .card p { color: var(--color-ink-650); }
  .product-card { min-height: 19rem; }
  .product-card__meta { align-items: center; display: flex; font-family: var(--font-mono); font-size: var(--font-size-xs); justify-content: space-between; letter-spacing: 0.07em; text-transform: uppercase; }
  .product-card__meta span:first-child { background: var(--color-brand-50); border-radius: var(--radius-sm); color: var(--color-brand-700); padding: var(--space-1) var(--space-2); }
  .product-card .text-link { align-self: end; }
  .feature-card__icon { align-items: center; background: var(--color-brand-50); border-radius: var(--radius-md); color: var(--color-brand-700); display: inline-flex; height: 2.75rem; justify-content: center; width: 2.75rem; }
  .pain-card { border-top: 2px solid var(--color-ink-950); display: grid; gap: var(--space-4); grid-template-columns: auto 1fr; padding-block: var(--space-5); }
  .pain-card__number { color: var(--color-brand-700); font-family: var(--font-mono); font-size: var(--font-size-xs); padding-top: 0.35rem; }
  .pain-card p { color: var(--color-ink-650); margin-top: var(--space-2); }
  .text-link { align-items: center; color: var(--color-brand-700); display: inline-flex; font-size: var(--font-size-sm); font-weight: 700; gap: var(--space-2); }

  .alert { align-items: flex-start; border: 1px solid; border-radius: var(--radius-md); display: flex; gap: var(--space-3); padding: var(--space-4); }
  .alert .icon { flex: 0 0 auto; margin-top: 0.25em; }
  .alert--info { background: var(--color-info-bg); border-color: #a8d6ed; color: var(--color-info); }
  .alert--success { background: var(--color-success-bg); border-color: #9ed4b4; color: var(--color-success); }
  .alert--warning { background: var(--color-warning-bg); border-color: #efd18f; color: var(--color-warning); }
  .alert--error { background: var(--color-error-bg); border-color: #ecadb2; color: var(--color-error); }

  .form-card { background: #fff; border: var(--border); border-radius: var(--radius-lg); box-shadow: var(--shadow-sm); display: grid; gap: var(--space-6); padding: var(--space-6); }
  .form-card__header { display: grid; gap: var(--space-3); }
  .form-grid { display: grid; gap: var(--space-5); }
  .field { display: grid; gap: var(--space-2); }
  .field label { color: var(--color-ink-950); font-size: var(--font-size-sm); font-weight: 700; }
  .field input, .field textarea, .field select { background: #fff; border: var(--border-strong); border-radius: var(--radius-md); color: var(--color-ink-950); min-height: 3rem; padding: 0.68rem 0.8rem; width: 100%; }
  .field textarea { resize: vertical; }
  .field input:hover, .field textarea:hover, .field select:hover { border-color: var(--color-ink-650); }
  .field input:focus, .field textarea:focus, .field select:focus { border-color: var(--color-brand-600); box-shadow: var(--shadow-focus); outline: none; }
  .field [aria-invalid="true"] { border-color: var(--color-error); box-shadow: 0 0 0 3px rgb(162 13 25 / 14%); }
  .field__hint { color: var(--color-ink-650); font-size: var(--font-size-xs); }
  .field__error { color: var(--color-error); display: none; font-size: var(--font-size-xs); }
  .field:has([aria-invalid="true"]) .field__error { display: block; }
  .checkbox { align-items: start; grid-template-columns: auto 1fr; }
  .checkbox input { margin-top: 0.25rem; min-height: auto; width: 1.1rem; }
  .checkbox label { font-weight: 500; }
  .checkbox .field__error { grid-column: 2; }
  .field--trap { height: 0; left: -10000px; overflow: hidden; position: absolute; width: 0; }
  .authority-band { border-block: var(--border); padding-block: var(--space-5); }
  .authority-band__list { display: grid; gap: var(--space-4); list-style: none; }
  .authority-band__list li { align-items: center; color: var(--color-ink-650); display: flex; font-size: var(--font-size-sm); font-weight: 650; gap: var(--space-2); }
  .authority-band__list .icon { color: var(--color-brand-700); flex: 0 0 auto; }
  .section-actions { margin-top: var(--space-8); }
  .segment-list { display: grid; gap: var(--space-3); list-style: none; }
  .segment-list a { align-items: center; background: #fff; border: var(--border); border-radius: var(--radius-md); color: var(--color-ink-950); display: flex; font-weight: 700; justify-content: space-between; padding: var(--space-4); text-decoration: none; }
  .segment-list a:hover { border-color: var(--color-brand-600); color: var(--color-brand-700); }
  .segment-list > li > span { background: #fff; border: var(--border); border-radius: var(--radius-md); color: var(--color-ink-950); display: block; font-weight: 700; padding: var(--space-4); }
  .home-form-grid { display: grid; gap: var(--space-8); }
  .home-form-copy { align-content: start; display: grid; gap: var(--space-5); }
  .home-form-copy ul { display: grid; gap: var(--space-3); list-style: none; }
  .home-form-copy li { align-items: flex-start; display: flex; gap: var(--space-2); }
  .home-form-copy li .icon { color: var(--color-success); margin-top: .35em; }
  .product-content { max-width: var(--content-width); }
  .definition-panel { background: var(--color-surface-dark); border-radius: var(--radius-lg); color: #dce2e5; display: grid; gap: var(--space-3); padding: var(--space-6); }
  .definition-panel strong { color: #fff; }
  .consequence-panel { border-left: 3px solid var(--color-warning); margin-top: var(--space-8); max-width: var(--content-width); padding: var(--space-4) var(--space-5); }
  .consequence-panel h3 { font-size: var(--font-size-md); margin-bottom: var(--space-2); }
  .consequence-panel p { color: var(--color-ink-650); }
  .evaluation-grid { border-top: var(--border-strong); display: grid; gap: var(--space-10); margin-top: var(--space-10); padding-top: var(--space-10); }
  .check-list { display: grid; gap: var(--space-3); list-style: none; }
  .check-list li { align-items: flex-start; display: flex; gap: var(--space-3); }
  .check-list .icon { color: var(--color-brand-700); flex: 0 0 auto; margin-top: .35em; }
  .hub-hero { background: var(--color-surface-dark); color: #dce2e5; }
  .hub-hero h1 { color: #fff; max-width: 55rem; }
  .hub-hero p:not(.eyebrow) { font-size: var(--font-size-md); margin-top: var(--space-5); max-width: 48rem; }
  .knowledge-tools { display: grid; gap: var(--space-5); margin-bottom: var(--space-8); }
  .knowledge-search { max-width: 38rem; }
  .knowledge-search-form { align-items: end; display: flex; flex-wrap: wrap; gap: var(--space-3); }
  .knowledge-search-form .knowledge-search { flex: 1 1 20rem; }
  .filter-list { display: flex; flex-wrap: wrap; gap: var(--space-2); }
  .filter-list a { background: #fff; border: var(--border); border-radius: var(--radius-pill); color: var(--color-ink-800); font-size: var(--font-size-sm); padding: var(--space-2) var(--space-4); text-decoration: none; }
  .filter-list a:hover, .filter-list a[aria-current="page"] { border-color: var(--color-brand-600); color: var(--color-brand-700); }
  .knowledge-results { color: var(--color-ink-650); font-size: var(--font-size-sm); min-height: 1.5rem; }
  .knowledge-grid { display: grid; gap: var(--space-5); }
  .knowledge-card { background: #fff; border: var(--border); border-radius: var(--radius-lg); display: grid; gap: var(--space-4); padding: var(--space-6); position: relative; }
  .knowledge-card__meta { color: var(--color-ink-650); display: flex; flex-wrap: wrap; font-family: var(--font-mono); font-size: var(--font-size-xs); gap: var(--space-3); text-transform: uppercase; }
  .knowledge-card h2 { font-size: var(--font-size-lg); }
  .knowledge-card h2 a { color: var(--color-ink-950); text-decoration: none; }
  .knowledge-card h2 a::after { content: ""; inset: 0; position: absolute; }
  .knowledge-card p { color: var(--color-ink-650); }
  .pagination { align-items: center; display: flex; gap: var(--space-4); justify-content: center; margin-top: var(--space-10); }
  .pagination a { border: var(--border); border-radius: var(--radius-md); padding: var(--space-2) var(--space-4); text-decoration: none; }
  .empty-state { background: var(--color-info-bg); border-left: 3px solid var(--color-info); padding: var(--space-4); }
  .hub-links { display: flex; flex-wrap: wrap; gap: var(--space-3); margin-top: var(--space-6); }
  .hub-links a { font-weight: 700; }
  .article-hero { border-bottom: var(--border); padding-block: var(--space-16); }
  .article-hero h1 { max-width: 58rem; }
  .article-lead { color: var(--color-ink-650); font-size: var(--font-size-md); margin-top: var(--space-5); max-width: 48rem; }
  .article-meta { color: var(--color-ink-650); display: flex; flex-wrap: wrap; font-size: var(--font-size-sm); gap: var(--space-3) var(--space-5); margin-top: var(--space-6); }
  .article-layout { padding-block: var(--space-12); }
  .article-body { max-width: var(--content-width); }
  .article-intro { border-left: 3px solid var(--color-brand-600); color: var(--color-ink-950); font-size: var(--font-size-md); margin-bottom: var(--space-8); padding-left: var(--space-5); }
  .article-section { scroll-margin-top: calc(var(--header-height) + var(--space-5)); }
  .article-section + .article-section { border-top: var(--border); margin-top: var(--space-10); padding-top: var(--space-10); }
  .article-section h2 { margin-bottom: var(--space-5); }
  .article-section h3 { font-size: var(--font-size-md); margin-bottom: var(--space-3); }
  .article-section p + p { margin-top: var(--space-4); }
  .article-section ul { display: grid; gap: var(--space-2); margin-top: var(--space-5); padding-left: var(--space-6); }
  .article-references { background: var(--color-surface-subtle); border-radius: var(--radius-md); margin-top: var(--space-6); padding: var(--space-5); }
  .editorial-note { align-items: flex-start; background: var(--color-info-bg); border-left: 3px solid var(--color-info); display: flex; gap: var(--space-3); margin-top: var(--space-10); padding: var(--space-5); }
  .editorial-note .icon { color: var(--color-info); flex: 0 0 auto; margin-top: .3em; }
  .article-commercial { border-top: 2px solid var(--color-ink-950); margin-top: var(--space-10); padding-top: var(--space-8); }
  .article-commercial h2, .article-commercial p { margin-top: var(--space-3); }
  .article-commercial .button { margin-top: var(--space-5); }
  .glossary-grid { display: grid; gap: var(--space-4); margin-top: var(--space-8); }
  .glossary-term { background: #fff; border: var(--border); border-radius: var(--radius-md); padding: var(--space-5); }
  .glossary-term h2 { font-size: var(--font-size-md); margin-bottom: var(--space-2); }
  .glossary-term p { color: var(--color-ink-650); }

  .accordion { border-top: var(--border-strong); }
  .accordion__item { border-bottom: var(--border-strong); }
  .accordion h3 { font-size: var(--font-size-md); }
  .accordion button { align-items: center; background: transparent; border: 0; color: var(--color-ink-950); display: flex; font-weight: 700; gap: var(--space-4); justify-content: space-between; padding: var(--space-5) 0; text-align: left; width: 100%; }
  .accordion button .icon { flex: 0 0 auto; transition: transform var(--transition-fast); }
  .accordion button[aria-expanded="true"] .icon { transform: rotate(180deg); }
  .accordion__panel { color: var(--color-ink-650); max-width: 50rem; padding: 0 0 var(--space-5); }

  .testimonial { background: var(--color-surface-dark); border-radius: var(--radius-lg); color: #dce2e5; display: grid; gap: var(--space-6); padding: var(--space-8); }
  .testimonial__icon { color: var(--color-brand-500); }
  .testimonial__icon .icon { height: 2rem; width: 2rem; }
  .testimonial blockquote { color: #fff; font-size: var(--font-size-lg); line-height: 1.45; }
  .testimonial figcaption { display: grid; font-size: var(--font-size-sm); }
  .testimonial figcaption span { color: #9da7ad; }

  .logo-strip { border-block: var(--border); padding-block: var(--space-6); }
  .logo-strip > p { color: var(--color-ink-650); font-size: var(--font-size-xs); font-weight: 700; letter-spacing: 0.08em; margin-bottom: var(--space-5); text-transform: uppercase; }
  .logo-strip ul { display: grid; gap: var(--space-3); grid-template-columns: repeat(2, 1fr); list-style: none; }
  .logo-strip li { align-items: center; border: 1px dashed var(--color-line-strong); color: var(--color-ink-650); display: flex; font-family: var(--font-mono); font-size: var(--font-size-xs); justify-content: center; min-height: 4rem; padding: var(--space-3); text-align: center; }

  .authority-grid { display: grid; gap: var(--space-4); }
  .authority-card { align-items: start; border-left: 3px solid var(--color-brand-600); display: grid; gap: var(--space-4); grid-template-columns: auto 1fr; padding: var(--space-4) var(--space-5); }
  .authority-card > span { color: var(--color-brand-700); padding-top: 0.2rem; }
  .authority-card p { color: var(--color-ink-650); margin-top: var(--space-1); }
  .reviewer { align-items: start; background: var(--color-surface-subtle); border: var(--border); border-radius: var(--radius-lg); display: grid; gap: var(--space-4); grid-template-columns: auto 1fr; padding: var(--space-5); }
  .reviewer__avatar { align-items: center; background: var(--color-ink-950); border-radius: 50%; color: #fff; display: flex; font-family: var(--font-mono); height: 3.25rem; justify-content: center; width: 3.25rem; }
  .reviewer p:not(.eyebrow), .reviewer span { color: var(--color-ink-650); font-size: var(--font-size-sm); }

  .toc { border-left: 3px solid var(--color-brand-600); padding: var(--space-4) var(--space-5); }
  .toc__title { color: var(--color-ink-950); font-weight: 750; margin-bottom: var(--space-3); }
  .toc ol { display: grid; gap: var(--space-2); padding-left: var(--space-5); }
  .toc a { color: var(--color-ink-650); }

  .related-content { display: grid; gap: var(--space-4); }
  .related-content article { border-top: 2px solid var(--color-ink-950); display: grid; gap: var(--space-3); padding-block: var(--space-5); position: relative; }
  .related-content h3 a { color: var(--color-ink-950); text-decoration: none; }
  .related-content h3 a::after { content: ""; inset: 0; position: absolute; }
  .related-content p:not(.eyebrow) { color: var(--color-ink-650); }

  .table-wrap { border: var(--border); border-radius: var(--radius-md); overflow-x: auto; }
  .table-wrap:focus-visible { box-shadow: var(--shadow-focus); outline: none; }
  table { border-collapse: collapse; min-width: 42rem; width: 100%; }
  th, td { border-bottom: var(--border); padding: var(--space-4); text-align: left; vertical-align: top; }
  thead th { background: var(--color-surface-dark); color: #fff; font-size: var(--font-size-sm); }
  tbody th { color: var(--color-ink-950); }
  tbody tr:nth-child(even) { background: var(--color-surface-subtle); }

  .cta-block { align-items: start; background: var(--color-brand-600); border-radius: var(--radius-lg); color: #ffe9ea; display: grid; gap: var(--space-8); overflow: hidden; padding: var(--space-8); position: relative; }
  .cta-block::after { border: 4rem solid rgb(255 255 255 / 8%); border-radius: 50%; content: ""; height: 18rem; position: absolute; right: -7rem; top: -7rem; width: 18rem; }
  .cta-block > * { position: relative; z-index: 1; }
  .cta-block h2 { color: #fff; margin-bottom: var(--space-3); }

  .cookie-notice { background: #fff; border: var(--border-strong); border-radius: var(--radius-lg); bottom: var(--space-4); box-shadow: var(--shadow-md); display: grid; gap: var(--space-5); left: var(--space-4); max-width: 44rem; padding: var(--space-5); position: fixed; right: var(--space-4); z-index: 400; }
  .cookie-notice p:not(.eyebrow) { color: var(--color-ink-650); margin-block: var(--space-2); }

  .site-footer { background: var(--color-surface-dark); color: #aeb8be; padding-top: var(--space-16); }
  .site-footer__grid { display: grid; gap: var(--space-10); }
  .brand--footer, .brand--footer:hover { color: #fff; }
  .brand--footer .brand__text small { color: #9da7ad; }
  .site-footer__brand p { margin-top: var(--space-5); max-width: 25rem; }
  .site-footer__heading { color: #fff; font-size: var(--font-size-base); margin-bottom: var(--space-4); }
  .site-footer__links { display: grid; gap: var(--space-2); list-style: none; }
  .site-footer a { color: #cbd2d6; }
  .site-footer__bottom { border-top: 1px solid #364047; display: grid; gap: var(--space-4); margin-top: var(--space-12); padding-block: var(--space-5); }
  .site-footer__bottom ul { display: flex; flex-wrap: wrap; gap: var(--space-4); list-style: none; }
}

@layer utilities {
  .color-swatch { border: var(--border); border-radius: var(--radius-md); overflow: hidden; }
  .color-swatch__sample { height: 5rem; }
  .color-swatch__meta { display: grid; font-family: var(--font-mono); font-size: var(--font-size-xs); gap: var(--space-1); padding: var(--space-3); }
  .type-sample { border-top: var(--border); padding-block: var(--space-5); }
  .type-sample code { color: var(--color-ink-650); font-family: var(--font-mono); font-size: var(--font-size-xs); }
  .style-guide-note { background: var(--color-warning-bg); border-left: 3px solid var(--color-warning); padding: var(--space-4); }
}

@media (min-width: 40rem) {
  .container { padding-inline: var(--space-8); }
  .button-group { align-items: center; flex-direction: row; }
  .authority-band__list { grid-template-columns: repeat(3, 1fr); }
  .segment-list { grid-template-columns: repeat(2, 1fr); }
  .evaluation-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .knowledge-grid, .glossary-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .form-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .field--full { grid-column: 1 / -1; }
  .logo-strip ul { grid-template-columns: repeat(4, 1fr); }
  .related-content, .authority-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .cookie-notice { align-items: center; grid-template-columns: 1fr auto; }
  .site-footer__bottom { align-items: center; grid-template-columns: 1fr auto; }
}

@media (min-width: 64rem) {
  .section { padding-block: var(--space-20); }
  .site-nav, .site-header__cta { display: block; }
  .menu-toggle { display: none; }
  .hero { padding-block: var(--space-24); }
  .hero__grid { align-items: center; grid-template-columns: minmax(0, 1.35fr) minmax(20rem, 0.65fr); }
  .grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .segment-list { grid-template-columns: repeat(3, 1fr); }
  .home-form-grid { grid-template-columns: minmax(0, .8fr) minmax(30rem, 1.2fr); }
  .knowledge-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .content-layout { align-items: start; grid-template-columns: 16rem minmax(0, 1fr); }
  .toc { position: sticky; top: calc(var(--header-height) + var(--space-5)); }
  .related-content { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .authority-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .cta-block { align-items: center; grid-template-columns: minmax(0, 1fr) auto; padding: var(--space-10); }
  .site-footer__grid { grid-template-columns: 1.5fr repeat(3, 1fr); }
}

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

@media (forced-colors: active) {
  .button, .brand__mark, .feature-card__icon { forced-color-adjust: none; }
}