:root {
  --paper: #f4efe5;
  --ink: #11100e;
  --muted: #6c675f;
  --line: #c9c0b2;
  --max: 1180px;
  --reading: 720px;
  --font-sans: "Helvetica Neue", Helvetica, Arial, sans-serif;
  --font-condensed: "Arial Narrow", "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 18px;
  line-height: 1.55;
}
a { color: inherit; text-decoration-thickness: 1px; text-underline-offset: .22em; }
img { display: block; width: 100%; height: auto; }
button, input, textarea, select { font: inherit; }
[hidden] { display: none !important; }

.skip-link {
  position: fixed;
  z-index: 100;
  top: 1rem;
  left: 1rem;
  transform: translateY(-200%);
  background: var(--ink);
  color: var(--paper);
  padding: .7rem 1rem;
}
.skip-link:focus { transform: none; }

.site-header {
  width: min(calc(100% - 2rem), var(--max));
  margin: 0 auto;
  min-height: 110px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  border-bottom: 1px solid var(--line);
}
.wordmark {
  display: inline-flex;
  flex-direction: column;
  gap: 0;
  font-family: var(--font-condensed);
  font-stretch: condensed;
  font-weight: 800;
  font-size: 1.45rem;
  line-height: .75;
  letter-spacing: -.05em;
  text-decoration: none;
}
.site-nav { display: flex; gap: 1.5rem; font-size: .75rem; letter-spacing: .12em; text-transform: uppercase; }
.site-nav a { text-decoration: none; }
.site-nav a[aria-current="page"] { border-bottom: 1px solid; }
.nav-toggle { display: none; border: 0; background: none; text-transform: uppercase; font-size: .75rem; letter-spacing: .1em; }

main { min-height: 70vh; }
.home-intro, .page-hero, .experience-header, .current-threshold, .path-preview, .home-principle,
.path-list, .random-link, .trace-grid, .trace-detail, .principle-page, .link-list, .error-page, .experience-nav {
  width: min(calc(100% - 2rem), var(--max));
  margin-inline: auto;
}

.home-intro { padding: clamp(5rem, 12vw, 10rem) 0 clamp(4rem, 8vw, 7rem); }
.home-intro h1, .page-hero h1 {
  max-width: 1050px;
  margin: 0;
  font-family: var(--font-condensed);
  font-size: clamp(3.7rem, 10vw, 9rem);
  line-height: .88;
  letter-spacing: -.065em;
  text-transform: uppercase;
}
.kicker, .section-label, .threshold-path {
  margin: 0 0 1.2rem;
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .18em;
  text-transform: uppercase;
}
.home-deck, .page-intro { max-width: var(--reading); margin-top: 2rem; font-size: clamp(1.1rem, 2vw, 1.5rem); }

.current-threshold { padding: 4rem 0 7rem; border-top: 1px solid var(--line); }
.threshold {
  max-width: 920px;
  margin: 0 auto;
  padding: clamp(2rem, 6vw, 5rem);
  border: 1px solid var(--ink);
  background: rgba(255,255,255,.18);
}
.threshold-stop {
  max-width: 850px;
  margin: 0 0 2.5rem;
  font-family: var(--font-condensed);
  font-size: clamp(3rem, 8vw, 7rem);
  line-height: .9;
  letter-spacing: -.055em;
  text-transform: uppercase;
}
.threshold-fragment { max-width: 760px; margin: 2rem 0; font-size: clamp(1.25rem, 3vw, 2.1rem); line-height: 1.25; }
.threshold-media { margin: 2rem 0; }
.threshold-audio audio { width: 100%; }
.threshold-instruction { max-width: 650px; font-size: clamp(1.1rem, 2vw, 1.4rem); }
.timer-button {
  margin-top: 2rem;
  padding: .85rem 1.2rem;
  border: 1px solid var(--ink);
  background: var(--ink);
  color: var(--paper);
  cursor: pointer;
}
.timer-button:disabled { opacity: .45; cursor: wait; }
.timer-display { margin-top: 2rem; font-family: var(--font-condensed); font-size: clamp(4rem, 12vw, 9rem); line-height: 1; }
.threshold-question { margin-top: 3rem; max-width: 760px; border-top: 1px solid var(--line); padding-top: 2rem; font-size: clamp(1.6rem, 4vw, 3rem); line-height: 1.05; }
.threshold-note { max-width: 650px; margin-top: 3rem; color: var(--muted); font-size: .95rem; }
.threshold-more { max-width: 920px; margin: 1rem auto 0; text-align: right; font-size: .8rem; text-transform: uppercase; letter-spacing: .1em; }

.path-preview, .home-principle { padding: 6rem 0; border-top: 1px solid var(--line); }
.path-preview h2 { max-width: 800px; font-size: clamp(2.2rem, 5vw, 4.8rem); line-height: .95; letter-spacing: -.04em; }
.path-grid { display: grid; grid-template-columns: repeat(5, 1fr); margin-top: 4rem; border-top: 1px solid var(--line); }
.path-card { min-height: 280px; padding: 1rem; border-right: 1px solid var(--line); text-decoration: none; display: flex; flex-direction: column; }
.path-card:last-child { border-right: 0; }
.path-number { color: var(--muted); font-size: .75rem; }
.path-card strong { margin-top: auto; font-family: var(--font-condensed); font-size: 2rem; line-height: 1; text-transform: uppercase; }
.path-card span:last-child { margin-top: 1rem; font-size: .85rem; color: var(--muted); }
.home-principle blockquote { max-width: 950px; margin: 2rem 0; font-family: var(--font-condensed); font-size: clamp(2.7rem, 7vw, 6.5rem); line-height: .92; letter-spacing: -.05em; text-transform: uppercase; }
.text-link { display: inline-block; margin-top: 1.5rem; }

.page-hero { padding: clamp(5rem, 10vw, 9rem) 0 5rem; }
.path-list { border-top: 1px solid var(--ink); }
.path-row { display: grid; grid-template-columns: 70px 1fr 1.5fr; gap: 2rem; padding: 1.5rem 0; border-bottom: 1px solid var(--line); text-decoration: none; align-items: baseline; }
.path-row strong { font-family: var(--font-condensed); font-size: clamp(1.8rem, 4vw, 3.5rem); line-height: 1; text-transform: uppercase; }
.path-row em { font-style: normal; color: var(--muted); }
.random-link { padding: 3rem 0 7rem; text-align: right; }

.experience-header { padding: 3rem 0 2rem; }
.back-link { font-size: .78rem; text-transform: uppercase; letter-spacing: .1em; }
.template-experience .threshold { margin-bottom: 5rem; }
.experience-nav { padding: 2rem 0 6rem; display: flex; justify-content: space-between; border-top: 1px solid var(--line); }

.trace-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); margin-bottom: 7rem; }
.trace-card { background: var(--paper); padding: 1.5rem; text-decoration: none; }
.trace-card img, .trace-placeholder { aspect-ratio: 9 / 7; object-fit: cover; background: linear-gradient(135deg, transparent 45%, var(--line) 46%, var(--line) 54%, transparent 55%); margin-bottom: 1.5rem; }
.trace-card span { font-size: .7rem; letter-spacing: .12em; text-transform: uppercase; color: var(--muted); }
.trace-card h2 { font-family: var(--font-condensed); font-size: clamp(2rem, 4vw, 4rem); line-height: .95; letter-spacing: -.04em; text-transform: uppercase; }
.trace-card p { color: var(--muted); }
.trace-detail, .principle-page { padding: 5rem 0 8rem; }
.trace-detail > h1 { max-width: 960px; font-family: var(--font-condensed); font-size: clamp(3.5rem, 9vw, 8rem); line-height: .88; letter-spacing: -.06em; text-transform: uppercase; }
.trace-deck { max-width: 720px; font-size: 1.4rem; }
.trace-detail figure { margin: 4rem 0; }

.prose { max-width: var(--reading); margin: 4rem auto 0; }
.prose > * + * { margin-top: 1.4em; }
.prose h2 { margin-top: 3em; font-family: var(--font-condensed); font-size: 2.4rem; line-height: 1; text-transform: uppercase; }
.prose blockquote { margin: 2.5rem 0; font-family: var(--font-condensed); font-size: 2.3rem; line-height: 1.05; }
.prose-large { font-size: 1.12rem; }
.principle-subtitle { max-width: 700px; font-size: 1.5rem; }
.echo { max-width: var(--reading); margin: 5rem auto 0; padding: 2rem 0; border-top: 1px solid var(--ink); }

.link-list { display: grid; gap: 1px; background: var(--line); border: 1px solid var(--line); margin-bottom: 8rem; }
.external-card { display: grid; grid-template-columns: 1fr 2fr auto; gap: 2rem; padding: 2rem; background: var(--paper); text-decoration: none; align-items: baseline; }
.external-card strong { font-family: var(--font-condensed); font-size: 2.5rem; text-transform: uppercase; }
.external-card span { color: var(--muted); }
.external-card em { font-style: normal; font-size: .75rem; letter-spacing: .1em; text-transform: uppercase; }
.error-page { padding: 10rem 0; }
.error-page h1 { font-family: var(--font-condensed); font-size: clamp(4rem, 10vw, 9rem); line-height: .9; text-transform: uppercase; }

.site-footer {
  width: min(calc(100% - 2rem), var(--max));
  margin: 0 auto;
  padding: 4rem 0 2rem;
  border-top: 1px solid var(--ink);
}
.footer-statement { margin: 0; font-family: var(--font-condensed); font-size: clamp(2rem, 5vw, 4.5rem); line-height: 1; text-transform: uppercase; }
.footer-context { max-width: 680px; color: var(--muted); font-size: .85rem; }
.footer-nav { display: flex; gap: 1rem; margin-top: 3rem; font-size: .7rem; letter-spacing: .12em; text-transform: uppercase; }

@media (max-width: 900px) {
  .nav-toggle { display: block; }
  .site-nav { display: none; position: absolute; top: 95px; left: 1rem; right: 1rem; z-index: 20; padding: 1.5rem; background: var(--ink); color: var(--paper); flex-direction: column; }
  .site-nav.is-open { display: flex; }
  .path-grid { grid-template-columns: 1fr; }
  .path-card { min-height: 170px; border-right: 0; border-bottom: 1px solid var(--line); }
  .path-row { grid-template-columns: 45px 1fr; }
  .path-row em { grid-column: 2; }
  .trace-grid { grid-template-columns: 1fr; }
  .external-card { grid-template-columns: 1fr; gap: .75rem; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}