@font-face {
  font-family: Inter;
  src: url('/kpv-inter-variable.woff2') format('woff2');
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
}

:root {
  --paper: #ffffff;
  --ink: #000000;
  --unit: 8px;
  --space-xs: calc(var(--unit) * 1);
  --space-sm: calc(var(--unit) * 2);
  --space-md: calc(var(--unit) * 3);
  --space-lg: calc(var(--unit) * 4);
  --space-xl: calc(var(--unit) * 6);
  --space-xxl: calc(var(--unit) * 8);
  --space-section: calc(var(--unit) * 12);
  --containment: 1280px;
  --measure: 72ch;
  --font-body: Inter, Arial, sans-serif;
  --font-value: ui-monospace, SFMono-Regular, Menlo, monospace;
  --text-body: 1rem;
  --text-label: .875rem;
  --text-h1: 2.25rem;
  --text-hero: clamp(2.5rem, 4.6vw, 4rem);
  --leading-body: 1.6;
  --leading-display: 1.04;
  --tracking-display: -.055em;
  --border: 1px solid var(--ink);
  --tap: 48px;
  --motion-duration: 280ms;
}

* { box-sizing: border-box; }
html { scroll-padding-top: 112px; }
body { margin: 0; background: var(--paper); color: var(--ink); font-family: var(--font-body); font-size: var(--text-body); font-weight: 400; line-height: var(--leading-body); }
button { font: inherit; }
a { color: inherit; text-decoration-thickness: 1px; text-underline-offset: .25em; }
a:hover { text-decoration-thickness: 2px; }
a:focus-visible, button:focus-visible { outline: 3px solid var(--ink); outline-offset: 4px; }
[hidden] { display: none !important; }
::selection { color: var(--paper); background: var(--ink); }
h1, h2, h3, p, figure { margin: 0; }
h1, h2, h3 { font-weight: 700; }
h1 { max-width: 25ch; font-size: var(--text-h1); line-height: var(--leading-display); letter-spacing: var(--tracking-display); }
h2 { font-size: clamp(1.5rem, 2.5vw, 2rem); letter-spacing: -.04em; line-height: 1.16; }
h3 { font-size: 1.125rem; line-height: 1.3; letter-spacing: -.025em; }
p { max-width: var(--measure); }
p + p { margin-top: var(--space-sm); }
img { max-width: 100%; }
code { font-family: var(--font-value); font-size: 1rem; font-weight: 400; }
.containment { width: min(calc(100% - var(--space-xxl)), var(--containment)); margin-inline: auto; }
.eyebrow { margin-bottom: var(--space-md); font-size: var(--text-label); font-weight: 500; line-height: 1.5; letter-spacing: .015em; }
.lead { margin-top: var(--space-md); max-width: 58ch; font-size: 1.125rem; line-height: 1.6; }
.skip-link { position: fixed; top: var(--space-xs); left: var(--space-xs); z-index: 10; padding: var(--space-sm); background: var(--ink); color: var(--paper); transform: translateY(-160%); }
.skip-link:focus { transform: translateY(0); }
.masthead { min-height: 104px; display: flex; align-items: center; justify-content: space-between; gap: var(--space-md); }
.site-name { min-height: var(--tap); display: inline-flex; gap: var(--space-sm); align-items: center; text-decoration: none; font-size: 1rem; font-weight: 500; }
.site-initials { font-size: 1.75rem; font-weight: 700; line-height: 1; letter-spacing: -.075em; }
.language-toggle { min-height: var(--tap); padding: var(--space-xs) var(--space-sm); border: var(--border); background: var(--paper); color: var(--ink); cursor: pointer; font-size: 1rem; font-weight: 500; }
.language-toggle[aria-pressed='true'] { background: var(--ink); color: var(--paper); }
.language-toggle:hover { text-decoration: underline; text-underline-offset: 4px; }
.rail-shell { position: sticky; top: 0; z-index: 3; border-block: var(--border); background: var(--paper); }
.anchor-rail { display: flex; align-items: stretch; flex-wrap: wrap; column-gap: var(--space-lg); }
.anchor-rail a { display: flex; align-items: center; min-width: 48px; min-height: var(--tap); font-size: 1rem; text-decoration: none; }
.anchor-rail a:hover { text-decoration: underline; }
.anchor-rail a:first-child { margin-right: auto; font-weight: 500; }
.home-reading { padding-top: var(--space-xxl); }
.split-hero { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr); gap: var(--space-xxl); }
.hero-copy h1 { max-width: 11ch; font-size: var(--text-hero); }
.hero-copy .lead { max-width: 46ch; }
.hero-copy, .briefing-hero { animation: settle var(--motion-duration) ease-out; }
.first-answer { margin-top: var(--space-xl); }
.first-answer h2 { margin-bottom: var(--space-md); font-size: 1.5rem; }
.hero-art { display: grid; align-content: start; gap: var(--space-lg); padding-top: var(--space-sm); }
.still-life { position: relative; isolation: isolate; width: 100%; aspect-ratio: 3 / 2; overflow: hidden; background: var(--paper); border: var(--border); }
.still-life img { position: absolute; inset: 0; z-index: 1; width: 100%; height: 100%; object-fit: cover; color: transparent; font-size: 0; }
.paper-form { position: absolute; width: 36%; height: 54%; left: 19%; top: 27%; background: var(--ink); clip-path: polygon(0 0, 100% 20%, 66% 100%, 16% 73%); }
.round-form { position: absolute; width: 21%; aspect-ratio: 1; left: 60%; top: 43%; border: 2px solid var(--ink); border-radius: 50%; background: var(--paper); }
.still-life-1 { aspect-ratio: 4 / 3; margin-top: var(--space-lg); }
.still-life-1 .paper-form { background: var(--paper); border: 1px solid var(--ink); clip-path: none; transform: rotate(-12deg); }
.word-help { padding: var(--space-md); border: var(--border); }
.word-help h2 { font-size: 1.125rem; font-weight: 500; letter-spacing: .015em; line-height: 1.5; margin-bottom: var(--space-sm); }
.word-help p { font-size: 1rem; line-height: 1.6; }
.home-chapter { margin-top: var(--space-section); }
.chapter-heading { max-width: var(--measure); }
.chapter-heading h2 { margin-bottom: var(--space-md); }
.term-index { margin-top: var(--space-xl); border-top: var(--border); }
.term-row { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); align-items: center; gap: var(--space-lg); padding: var(--space-md) 0; border-bottom: var(--border); }
.term-row:nth-child(even) { grid-template-columns: minmax(0, 1.2fr) minmax(0, .8fr); }
.term-row h3 { font-size: clamp(1.5rem, 2.7vw, 2.25rem); line-height: 1.16; letter-spacing: -.04em; }
.term-row a { display: flex; align-items: center; justify-content: space-between; gap: var(--space-md); min-height: var(--tap); text-decoration: none; }
.term-row a span { font-family: var(--font-value); font-size: 1.5rem; font-weight: 400; }
.term-row a:hover { text-decoration: underline; }
.term-row p { max-width: 40ch; font-size: 1rem; }
.practical-chapter { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: var(--space-xxl); }
.practical-index { border-top: var(--border); }
.practical-index a, .recovery-links a { display: flex; justify-content: space-between; align-items: center; gap: var(--space-md); padding: var(--space-sm) 0; border-bottom: var(--border); min-height: var(--tap); font-size: 1rem; text-decoration: none; }
.practical-index a:hover, .recovery-links a:hover { text-decoration: underline; }
.briefing-reading { padding-top: var(--space-xxl); }
.briefing-hero { max-width: 780px; margin-bottom: var(--space-xxl); }
.reading-layout { display: grid; grid-template-columns: minmax(0, 72ch) minmax(0, 1fr); gap: var(--space-xxl); align-items: start; }
.chapter-prose { min-width: 0; }
.reading-section + .reading-section, .reading-section > .reading-section { margin-top: var(--space-xl); }
.reading-section h2, .reading-section h3 { margin-bottom: var(--space-md); font-size: 1.5rem; letter-spacing: -.03em; line-height: 1.2; }
.reading-margin { min-width: 0; }
.chapter-notes { margin-top: var(--space-section); padding-top: var(--space-lg); border-top: var(--border); }
.chapter-notes > h2 { margin-bottom: var(--space-lg); }
.notes-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--space-lg) var(--space-xxl); }
.endnote { min-width: 0; }
.endnote h3 { margin-bottom: var(--space-sm); }
.endnote p { font-size: 1rem; max-width: 62ch; }
.endnote a { display: inline-flex; align-items: center; justify-content: space-between; gap: var(--space-sm); min-height: var(--tap); padding-block: var(--space-xs); font-size: 1rem; }
.read-next { display: grid; grid-template-columns: minmax(0, 1.3fr) minmax(0, .7fr); margin-top: var(--space-xxl); border: var(--border); }
.read-next a { display: grid; grid-template-columns: minmax(0, 1fr) auto; align-content: center; gap: var(--space-xs) var(--space-md); min-height: 144px; padding: var(--space-lg); text-decoration: none; }
.read-next a > span:first-child { grid-column: 1; font-size: 1rem; }
.read-next strong { grid-column: 1; font-size: 1.25rem; font-weight: 700; line-height: 1.25; letter-spacing: -.025em; }
.read-next a > span:last-child { grid-column: 2; grid-row: 1 / 3; align-self: center; font-size: 1.5rem; font-family: var(--font-value); }
.next-step { color: var(--paper); background: var(--ink); }
.read-next a:hover strong { text-decoration: underline; text-underline-offset: .2em; }
.site-footer { display: flex; justify-content: space-between; align-items: center; gap: var(--space-xl); margin-top: var(--space-section); padding-block: var(--space-lg); border-top: var(--border); }
.site-footer p { max-width: 60ch; font-size: 1rem; }
.footer-links { display: flex; gap: var(--space-md); flex-wrap: wrap; }
.footer-links a { display: inline-flex; align-items: center; min-width: 48px; min-height: var(--tap); padding-block: var(--space-xs); font-size: 1rem; white-space: nowrap; }
.missing-page { padding-top: var(--space-section); max-width: 800px; }
.missing-page > p { margin-top: var(--space-md); }
.missing-page .word-help, .recovery-links { margin-top: var(--space-lg); }
@keyframes settle { from { opacity: .94; transform: translateY(6px); } to { opacity: 1; transform: translateY(0); } }
@media (max-width: 960px) {
  .containment { width: min(calc(100% - var(--space-xl)), var(--containment)); }
  .split-hero { gap: var(--space-lg); }
  .reading-layout { grid-template-columns: minmax(0, 1fr) 260px; gap: var(--space-lg); }
  .practical-chapter { gap: var(--space-lg); }
  .site-footer { flex-direction: column; align-items: start; gap: var(--space-sm); }
}
@media (max-width: 700px) {
  html { scroll-padding-top: 160px; }
  .masthead { min-height: 88px; gap: var(--space-sm); }
  .site-name { gap: var(--space-xs); }
  .site-initials { font-size: 1.5rem; }
  .site-name > span:last-child { max-width: 8ch; line-height: 1.25; }
  .language-toggle { padding-inline: var(--space-sm); }
  .anchor-rail { column-gap: var(--space-md); }
  .anchor-rail a:first-child { margin-right: 0; }
  .home-reading, .briefing-reading { padding-top: var(--space-xl); }
  .split-hero, .practical-chapter, .reading-layout, .notes-grid { grid-template-columns: minmax(0, 1fr); }
  .hero-copy h1 { max-width: 13ch; }
  .hero-art { padding-top: 0; }
  .hero-art .still-life { max-width: 480px; }
  .hero-art .word-help { order: -1; }
  .hero-copy .lead, .lead { font-size: 1rem; }
  .briefing-hero { margin-bottom: var(--space-lg); }
  .reading-margin { grid-row: 1; }
  .reading-margin .still-life { display: none; }
  .term-row, .term-row:nth-child(even) { grid-template-columns: minmax(0, 1fr); gap: var(--space-xs); }
  .term-row h3 { font-size: 1.75rem; }
  .term-row p { max-width: none; }
  .home-chapter, .chapter-notes { margin-top: var(--space-xxl); }
  .read-next { grid-template-columns: minmax(0, 1fr); }
  .read-next a { min-height: 128px; padding: var(--space-md); }
  .site-footer { margin-top: var(--space-xxl); }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
}