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

@layer reset {
  *, *::before, *::after { box-sizing: border-box; }
  html { scroll-behavior: smooth; }
  body, h1, h2, h3, p, ul, ol, dl, dd, figure { margin: 0; }
  img { display: block; max-width: 100%; }
  button, a { font: inherit; }
}

@layer tokens {
  :root {
    --ink: #101318;
    --paper: #fbfaf6;
    --white: #ffffff;
    --cobalt: #174ea6;
    --blue: #245aab;
    --mist: #e7edf7;
    --graphite: #3c4655;
    --signal: #9c2f16;
    --line: #c4ccd8;
    --display: "Arial Narrow", "Roboto Condensed", Impact, sans-serif;
    --body: Arial, Helvetica, sans-serif;
    --measure: 72rem;
    --space-1: .4rem;
    --space-2: .75rem;
    --space-3: 1rem;
    --space-4: 1.5rem;
    --space-5: 2.25rem;
    --space-6: 3.5rem;
    --space-7: 5rem;
  }
}

@layer base {
  body {
    background: var(--paper);
    color: var(--ink);
    font-family: var(--body);
    font-size: 1rem;
    line-height: 1.65;
    text-rendering: optimizeLegibility;
  }
  h1, h2, h3 { font-family: var(--display); font-stretch: condensed; line-height: .96; text-transform: uppercase; }
  h1 { font-size: clamp(3rem, 9vw, 8.2rem); letter-spacing: -.045em; }
  h2 { font-size: clamp(2rem, 5vw, 4.4rem); letter-spacing: -.025em; }
  h3 { font-size: clamp(1.25rem, 2.5vw, 2rem); letter-spacing: -.012em; }
  p + p { margin-top: 1em; }
  a { color: var(--cobalt); text-decoration-thickness: .12em; text-underline-offset: .18em; }
  a:hover { color: var(--signal); }
  a:focus-visible, button:focus-visible { outline: .22rem solid var(--signal); outline-offset: .22rem; }
  ::selection { background: var(--cobalt); color: var(--white); }
}

@layer layout {
  .shell { width: min(calc(100% - 2rem), var(--measure)); margin-inline: auto; }
  .band { padding-block: clamp(3rem, 7vw, 6.5rem); }
  .band--ink { background: var(--ink); color: var(--white); }
  .band--cobalt { background: var(--cobalt); color: var(--white); }
  .band--mist { background: var(--mist); }
  .band--offset { position: relative; }
  .band--offset::before { content: ""; position: absolute; inset: 0 0 auto; height: .55rem; background: var(--signal); }
  .split { display: grid; grid-template-columns: minmax(0, 1.3fr) minmax(16rem, .7fr); gap: clamp(2rem, 6vw, 6rem); align-items: start; }
  .reading-grid { display: grid; grid-template-columns: minmax(12rem, .6fr) minmax(0, 1.4fr); gap: clamp(2rem, 6vw, 5rem); align-items: start; }
  .measure { max-width: 47rem; }
  .stack > * + * { margin-top: var(--space-4); }
}

@layer components {
  .skip-link { position: fixed; z-index: 100; top: .5rem; left: .5rem; transform: translateY(-180%); padding: .8rem 1rem; background: var(--white); color: var(--ink); border: .2rem solid var(--signal); }
  .skip-link:focus { transform: translateY(0); }

  .site-header { background: var(--paper); border-bottom: 1px solid var(--line); }
  .utility-row { background: var(--ink); color: var(--white); font-size: .78rem; letter-spacing: .09em; text-transform: uppercase; }
  .utility-row .shell { display: flex; justify-content: space-between; gap: 1rem; padding-block: .45rem; }
  .masthead { display: flex; justify-content: space-between; align-items: end; gap: 2rem; padding-block: 1.25rem .8rem; }
  .wordmark { color: var(--ink); text-decoration: none; font-family: var(--display); font-size: clamp(2.2rem, 5vw, 4rem); font-weight: 900; letter-spacing: -.04em; text-transform: uppercase; line-height: .85; }
  .descriptor { max-width: 17rem; color: var(--graphite); font-size: .84rem; line-height: 1.35; text-align: right; }
  .menu-toggle { display: none; min-height: 44px; padding: .6rem .8rem; border: 2px solid var(--ink); background: transparent; color: var(--ink); cursor: pointer; }
  .site-nav { border-top: 1px solid var(--line); }
  .site-nav ul { display: flex; flex-wrap: wrap; gap: 0; padding: 0; list-style: none; }
  .site-nav a { display: block; min-height: 44px; padding: .72rem 1rem; color: var(--ink); font-size: .82rem; font-weight: 700; letter-spacing: .035em; text-decoration: none; text-transform: uppercase; border-left: 1px solid var(--line); }
  .site-nav li:last-child a { border-right: 1px solid var(--line); }
  .site-nav a:hover, .site-nav a[aria-current="page"] { background: var(--cobalt); color: var(--white); }

  .eyebrow { display: inline-flex; gap: .5rem; align-items: center; color: var(--cobalt); font-size: .78rem; font-weight: 800; letter-spacing: .14em; text-transform: uppercase; }
  .band--ink .eyebrow, .band--cobalt .eyebrow { color: var(--white); }
  .eyebrow::before { content: ""; width: 2.5rem; height: .18rem; background: currentColor; }
  .hero { padding-block: clamp(3.5rem, 9vw, 8rem); overflow: hidden; }
  .hero h1 span { display: block; color: var(--cobalt); }
  .hero-intro { max-width: 45rem; margin-top: 2rem; font-size: clamp(1.05rem, 2vw, 1.35rem); }
  .hero-actions { display: flex; flex-wrap: wrap; gap: .8rem; margin-top: 2rem; }
  .button-link { display: inline-flex; align-items: center; justify-content: center; min-height: 46px; padding: .72rem 1rem; background: var(--cobalt); color: var(--white); font-weight: 800; text-decoration: none; text-transform: uppercase; letter-spacing: .035em; }
  .button-link:hover { background: var(--signal); color: var(--white); }
  .button-link--ghost { background: transparent; color: var(--ink); border: 2px solid var(--ink); }

  .section-head { display: grid; grid-template-columns: 7rem 1fr; gap: 1rem; align-items: start; margin-bottom: clamp(2rem, 5vw, 4rem); }
  .section-no { padding-top: .35rem; color: var(--cobalt); font-family: "Courier New", monospace; font-weight: 700; }
  .band--ink .section-no, .band--cobalt .section-no { color: var(--white); }

  .thesis { border-top: .6rem solid var(--cobalt); padding-top: 1.5rem; }
  .thesis-lead { max-width: 54rem; font-size: clamp(1.35rem, 3vw, 2.2rem); line-height: 1.25; }
  .evidence-strip { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; margin-top: 2.5rem; background: var(--line); border: 1px solid var(--line); }
  .evidence-strip div { background: var(--white); padding: 1.2rem; }
  .evidence-strip b { display: block; font-family: var(--display); font-size: 1.25rem; text-transform: uppercase; }
  .evidence-strip small { color: var(--graphite); }

  .book-index { container-type: inline-size; }
  .book-row { display: grid; grid-template-columns: 4rem minmax(0, 1.3fr) minmax(11rem, .65fr) minmax(12rem, .7fr); gap: 1.2rem; align-items: start; padding: 1.6rem 0; border-top: .38rem solid var(--cobalt); }
  .book-row + .book-row { margin-top: 1rem; }
  .book-code { font: 700 .8rem/1.2 "Courier New", monospace; color: var(--cobalt); }
  .book-row h3 { margin-bottom: .65rem; }
  .book-meta { color: var(--graphite); font-size: .9rem; }
  .book-links { display: grid; gap: .55rem; }
  .amazon-link { display: inline-flex; justify-content: space-between; gap: 1rem; min-height: 44px; padding: .6rem 0; border-block: 1px solid currentColor; font-weight: 800; text-decoration: none; }
  .amazon-link .arrow { transition: transform .18s ease; }
  .amazon-link:hover .arrow { transform: translate(.2rem, -.2rem); }
  .notice { padding: 1rem 1.2rem; border-left: .45rem solid var(--signal); background: var(--white); color: var(--ink); }
  .notice--dark { background: rgba(255,255,255,.08); color: var(--white); border-color: var(--white); }

  .force-map { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1px; background: var(--white); border: 1px solid rgba(255,255,255,.35); }
  .force-map article { min-height: 13rem; padding: 1.5rem; background: var(--ink); border-top: .45rem solid var(--white); }
  .force-map .axis { font-family: "Courier New", monospace; font-size: .78rem; text-transform: uppercase; letter-spacing: .08em; opacity: .8; }
  .force-map h3 { margin: .8rem 0; color: var(--white); }

  .archive-plate { display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(16rem, .6fr); gap: 0; background: var(--ink); color: var(--white); }
  .archive-plate img { width: 100%; height: 100%; min-height: 28rem; object-fit: cover; filter: grayscale(1) contrast(1.08); }
  .archive-caption { padding: clamp(1.5rem, 4vw, 3rem); border-top: .6rem solid var(--signal); }
  .archive-caption dl { margin-top: 2rem; }
  .archive-caption dt { font: 700 .76rem/1.3 "Courier New", monospace; color: #b8c9e8; text-transform: uppercase; }
  .archive-caption dd + dt { margin-top: 1rem; }

  .method-steps { counter-reset: method; display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); }
  .method-steps article { counter-increment: method; background: var(--paper); padding: 1.5rem; border-top: .45rem solid var(--cobalt); }
  .method-steps article::before { content: "0" counter(method); font: 800 1rem/1 "Courier New", monospace; color: var(--cobalt); }
  .method-steps h3 { margin: .85rem 0; }

  .breadcrumb { padding-block: 1rem; font-size: .85rem; color: var(--graphite); }
  .breadcrumb ol { display: flex; flex-wrap: wrap; gap: .5rem; padding: 0; list-style: none; }
  .breadcrumb li + li::before { content: "/"; margin-right: .5rem; }
  .book-hero { padding-block: clamp(2.5rem, 6vw, 5rem); border-block: .65rem solid var(--cobalt); }
  .book-hero h1 { font-size: clamp(2.5rem, 7vw, 6.2rem); }
  .cover-placeholder { min-height: 22rem; display: grid; place-items: center; padding: 2rem; background: var(--ink); color: var(--white); border-top: .7rem solid var(--signal); text-align: center; font: 800 1.3rem/1.2 var(--display); text-transform: uppercase; }
  .facts { border-top: .45rem solid var(--cobalt); }
  .facts div { display: grid; grid-template-columns: 9rem 1fr; gap: 1rem; padding: .7rem 0; border-bottom: 1px solid var(--line); }
  .facts dt { font: 700 .75rem/1.4 "Courier New", monospace; color: var(--graphite); text-transform: uppercase; }
  .review-body { max-width: 48rem; }
  .review-body section { padding-block: 2rem; border-top: .35rem solid var(--cobalt); }
  .review-body h2 { margin-bottom: 1.25rem; font-size: clamp(1.8rem, 4vw, 3rem); }
  .evidence-label { display: inline-block; margin-top: 1rem; padding: .4rem .55rem; background: var(--mist); color: var(--cobalt); font: 700 .76rem/1.2 "Courier New", monospace; text-transform: uppercase; }
  .external-panel { margin-top: 2.5rem; padding: 1.5rem; background: var(--mist); border-top: .55rem solid var(--signal); }
  .external-panel h2 { font-size: 1.8rem; }
  .related { margin-top: 2rem; }
  .related ul { padding-left: 1.2rem; }

  .page-title { padding-block: clamp(3rem, 7vw, 6rem); background: var(--cobalt); color: var(--white); }
  .page-title h1 { font-size: clamp(3rem, 8vw, 7rem); }
  .prose { max-width: 54rem; }
  .prose h2 { margin: 2.2rem 0 1rem; font-size: clamp(1.8rem, 4vw, 3rem); }
  .prose h3 { margin: 1.5rem 0 .7rem; }
  .prose ul, .prose ol { padding-left: 1.4rem; }
  .prose li + li { margin-top: .55rem; }

  .site-footer { padding-block: 3rem; background: var(--ink); color: var(--white); border-top: .65rem solid var(--signal); }
  .footer-grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: 3rem; }
  .footer-wordmark { font: 900 clamp(2rem, 5vw, 4rem)/.9 var(--display); text-transform: uppercase; }
  .footer-links { display: flex; flex-wrap: wrap; gap: .65rem 1rem; padding: 0; list-style: none; }
  .site-footer a { color: var(--white); }
  .footer-legal { margin-top: 2rem; padding-top: 1.2rem; border-top: 1px solid rgba(255,255,255,.3); font-size: .84rem; }

  @container (max-width: 52rem) {
    .book-row { grid-template-columns: 3rem 1fr; }
    .book-meta, .book-links { grid-column: 2; }
  }
}

@layer utilities {
  .muted { color: var(--graphite); }
  .small { font-size: .84rem; }
  .mono { font-family: "Courier New", monospace; }
  .top-gap { margin-top: var(--space-5); }
  .visually-hidden { position: absolute !important; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
}

@media (max-width: 52rem) {
  .split, .reading-grid, .archive-plate, .footer-grid { grid-template-columns: 1fr; }
  .evidence-strip, .method-steps { grid-template-columns: repeat(2, 1fr); }
  .archive-plate img { min-height: 20rem; }
  .js .menu-toggle { display: inline-flex; align-items: center; }
  .js .site-nav { display: none; }
  .js .site-nav[data-open="true"] { display: block; }
  .site-nav ul { display: grid; }
  .site-nav a, .site-nav li:last-child a { border: 0; border-top: 1px solid var(--line); }
}

@media (max-width: 35rem) {
  .shell { width: min(calc(100% - 1.2rem), var(--measure)); }
  .utility-row .shell { display: block; }
  .utility-row span:last-child { display: none; }
  .masthead { align-items: center; }
  .descriptor { display: none; }
  .section-head { grid-template-columns: 1fr; }
  .evidence-strip, .method-steps, .force-map { grid-template-columns: 1fr; }
  .book-row { grid-template-columns: 1fr; }
  .book-meta, .book-links { grid-column: 1; }
  .facts div { grid-template-columns: 1fr; gap: .2rem; }
}

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