/* ═══════════════════════════════════════════════════════════
   THE PERCH — shared site stylesheet

   Design DNA from baothiento.com/essays/chosen-care, tuned for ODA.
   Ink on parchment, warm-earth palette (ember/terra/cream) with
   cool muted accents (dusk/heather). PP Mori → Inter fallback;
   Fragment Mono → JetBrains Mono fallback; serif-italic →
   Fraunces. Narrow measure, generous whitespace.
   ═══════════════════════════════════════════════════════════ */

:root {
  --ink: #0e0c0a;
  --ink-85: rgba(14,12,10,0.85);
  --ink-70: rgba(14,12,10,0.70);
  --ink-50: rgba(14,12,10,0.50);
  --ink-30: rgba(14,12,10,0.30);
  --ink-12: rgba(14,12,10,0.12);
  --ink-6:  rgba(14,12,10,0.06);
  --ink-3:  rgba(14,12,10,0.03);
  --parchment: #F6F0E3;

  --ember:    #8B5A3C;
  --terra:    #C5624A;
  --cream:    #DCC495;
  --dusk:     #4A7888;
  --heather:  #7A5F94;
  --accent:   var(--ember);

  --font-body: 'Inter', ui-sans-serif, system-ui, -apple-system, 'PP Mori', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fragment Mono', ui-monospace, 'SFMono-Regular', Menlo, Monaco, Consolas, monospace;
  --font-serif:'Fraunces', 'Tiempos Text', 'Source Serif Pro', Georgia, serif;

  --size-eyebrow: 0.68rem;
  --size-small:   0.875rem;
  --size-body:    1.0625rem;
  --size-lead:    1.22rem;
  --size-title:   clamp(1.75rem, 1.2rem + 2vw, 2.6rem);
  --size-hero:    clamp(2.4rem, 1.6rem + 3vw, 3.8rem);

  --leading-body:  1.75;
  --leading-tight: 1.15;

  --track-body:    -0.006em;
  --track-lead:    -0.012em;
  --track-eyebrow: 0.18em;

  --measure:      60ch;
  --measure-wide: 72ch;

  --gap-para:    1.35em;
  --gap-section: 3.5em;

  --tick: 530ms;
}

@media (prefers-color-scheme: dark) {
  :root {
    --ink: #F6F0E3;
    --ink-85: rgba(246,240,227,0.85);
    --ink-70: rgba(246,240,227,0.70);
    --ink-50: rgba(246,240,227,0.50);
    --ink-30: rgba(246,240,227,0.30);
    --ink-12: rgba(246,240,227,0.12);
    --ink-6:  rgba(246,240,227,0.06);
    --ink-3:  rgba(246,240,227,0.03);
    --parchment: #0e0c0a;
    --accent:   var(--cream);
  }
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--parchment);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: var(--size-body);
  line-height: var(--leading-body);
  letter-spacing: var(--track-body);
  font-feature-settings: "kern" 1, "liga" 1, "calt" 1;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
}

::selection { background: var(--cream); color: var(--ink); }
@media (prefers-color-scheme: dark) {
  ::selection { background: var(--ember); color: var(--parchment); }
}

a { color: inherit; text-decoration: none; }
a.link { border-bottom: 1px solid var(--ink-30); transition: border-color 160ms; }
a.link:hover { border-color: var(--terra); color: var(--terra); }

/* ─── Top nav (shared across all pages) ─── */
.topnav {
  position: sticky;
  top: 0;
  z-index: 30;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  background: color-mix(in oklab, var(--parchment) 85%, transparent);
  border-bottom: 1px solid var(--ink-6);
  padding: 0.9rem 1.75rem;
  display: flex;
  gap: 1.6rem;
  align-items: center;
  font-family: var(--font-mono);
  font-size: var(--size-eyebrow);
  letter-spacing: var(--track-eyebrow);
  text-transform: uppercase;
}
.topnav .mark {
  color: var(--ember);
  margin-right: auto;
  font-weight: 500;
}
.topnav a.nav {
  color: var(--ink-50);
  border-bottom: 1px solid transparent;
  padding-bottom: 2px;
  transition: color 200ms, border-color 200ms;
}
.topnav a.nav:hover { color: var(--ink); }
.topnav a.nav.active { color: var(--ink); border-color: var(--ember); }
.topnav .muted { color: var(--ink-30); cursor: default; }

/* ─── main container ─── */
main {
  max-width: var(--measure);
  margin: 0 auto;
  padding: 5rem 1.75rem 14rem;
  position: relative;
}
main.wide { max-width: var(--measure-wide); }

/* ─── editorial chrome ─── */
.eyebrow {
  font-family: var(--font-mono);
  font-size: var(--size-eyebrow);
  letter-spacing: var(--track-eyebrow);
  text-transform: uppercase;
  color: var(--ink-50);
  margin: 0 0 2.25rem;
}

.title {
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 400;
  font-size: var(--size-title);
  line-height: var(--leading-tight);
  letter-spacing: var(--track-lead);
  margin: 0 0 0.6rem;
}

.hero {
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 400;
  font-size: var(--size-hero);
  line-height: 1.05;
  letter-spacing: -0.018em;
  margin: 0 0 1.5rem;
}

.subtitle {
  font-family: var(--font-body);
  font-size: var(--size-small);
  color: var(--ink-50);
  margin: 0 0 4.25rem;
  max-width: 54ch;
}

.abstract {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: var(--size-lead);
  line-height: 1.65;
  color: var(--ink-85);
  border-left: 2px solid var(--ember);
  padding: 0.4em 0 0.4em 1.35em;
  margin: 0 0 2.25rem;
  max-width: 56ch;
}
.abstract .label {
  display: block;
  font-family: var(--font-mono);
  font-style: normal;
  font-size: var(--size-eyebrow);
  letter-spacing: var(--track-eyebrow);
  text-transform: uppercase;
  color: var(--ember);
  margin-bottom: 0.7em;
}

.keywords {
  font-family: var(--font-mono);
  font-size: var(--size-eyebrow);
  letter-spacing: var(--track-eyebrow);
  text-transform: uppercase;
  color: var(--ink-50);
  margin: 0 0 3.25rem;
  line-height: 1.8;
}
.keywords .tag { color: var(--ink-70); }

/* ─── essay body ─── */
.essay-body { margin-top: 2rem; }
.essay-body p { margin: 0 0 var(--gap-para); }
.essay-body h2 {
  font-family: var(--font-mono);
  font-size: var(--size-eyebrow);
  letter-spacing: var(--track-eyebrow);
  text-transform: uppercase;
  color: var(--ember);
  margin: 3em 0 1em;
}
.essay-body h2 .roman {
  color: var(--ink-30);
  margin-right: 0.8em;
}
.essay-body h3 {
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 500;
  font-size: var(--size-lead);
  color: var(--ink-85);
  line-height: 1.3;
  margin: 2em 0 0.8em;
}
.essay-body strong { font-weight: 600; color: var(--ink); }
.essay-body em { font-style: italic; }
.essay-body ul, .essay-body ol { padding-left: 1.4em; margin: 0 0 var(--gap-para); }
.essay-body li { margin-bottom: 0.4em; }

.essay-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 2em 0;
  font-size: var(--size-small);
  line-height: 1.5;
}
.essay-body th, .essay-body td {
  text-align: left;
  padding: 0.6em 0.9em;
  border-bottom: 1px solid var(--ink-6);
  vertical-align: top;
}
.essay-body th {
  font-family: var(--font-mono);
  font-size: var(--size-eyebrow);
  letter-spacing: var(--track-eyebrow);
  text-transform: uppercase;
  color: var(--ink-50);
  font-weight: 400;
  border-bottom: 1px solid var(--ink-12);
}

/* ─── slab (MANIFESTO) ─── */
.slab {
  margin: 2em 0;
  padding: 0.5em 0 0.5em 2.5em;
  position: relative;
}
.slab::before {
  content: attr(data-num);
  position: absolute;
  left: 0;
  top: 0.5em;
  font-family: var(--font-mono);
  font-size: var(--size-eyebrow);
  letter-spacing: var(--track-eyebrow);
  color: var(--ember);
  line-height: 1.5;
}
.slab p {
  font-family: var(--font-body);
  font-size: var(--size-lead);
  line-height: 1.55;
  color: var(--ink-85);
}
.slab p + p { margin-top: 0.5em; }

/* ─── aside whisper ─── */
aside.whisper {
  background: var(--ink-3);
  border: 1px solid var(--ink-6);
  border-radius: 0.5rem;
  padding: 1.2rem 1.5rem;
  margin: 2.5em 0;
  font-family: var(--font-serif);
  font-style: italic;
  color: var(--ink-70);
}

/* ─── untranslatables ─── */
.untranslatable {
  font-family: var(--font-serif);
  font-style: italic;
  color: var(--dusk);
  cursor: help;
  text-decoration: underline;
  text-decoration-style: dotted;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  text-decoration-color: rgba(74,120,136,0.4);
}
@media (prefers-color-scheme: dark) {
  .untranslatable { color: var(--cream); text-decoration-color: rgba(220,196,149,0.4); }
}

/* ─── footnotes ─── */
sup.fn {
  font-family: var(--font-mono);
  font-size: 0.62em;
  color: var(--terra);
  cursor: pointer;
  margin-left: 0.12em;
  padding: 0 0.22em;
  vertical-align: super;
  border-radius: 2px;
  transition: background 160ms;
}
sup.fn:hover { background: var(--cream); }
sup.fn.active { background: var(--cream); color: var(--ember); }

.fn-body {
  display: block;
  margin: 0.4em 0 1.6em;
  padding: 0.6em 1em;
  background: var(--ink-3);
  border-left: 2px solid var(--terra);
  font-family: var(--font-serif);
  font-size: var(--size-small);
  color: var(--ink-70);
  line-height: 1.6;
}
.fn-body .num {
  font-family: var(--font-mono);
  font-style: normal;
  color: var(--terra);
  margin-right: 0.6em;
}

/* ─── dividers ─── */
.hole {
  display: block;
  text-align: center;
  color: var(--ink-30);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  margin: 2em 0;
  letter-spacing: 1em;
  padding-left: 1em;
}
hr.plain {
  border: none;
  border-top: 1px solid var(--ink-12);
  margin: 3em 0;
}

/* ─── essay index cards ─── */
.essay-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  margin-top: 2rem;
}
.essay-card {
  display: grid;
  grid-template-columns: 5rem 1fr auto;
  gap: 1.5rem;
  padding: 1.6rem 0;
  border-bottom: 1px solid var(--ink-6);
  align-items: baseline;
  transition: background 200ms;
}
.essay-card:hover { background: var(--ink-3); }
.essay-card .num {
  font-family: var(--font-mono);
  font-size: var(--size-eyebrow);
  letter-spacing: var(--track-eyebrow);
  color: var(--ink-30);
}
.essay-card .body .title {
  font-size: var(--size-lead);
  font-style: italic;
  font-family: var(--font-serif);
  margin: 0 0 0.35em;
  line-height: 1.2;
  color: var(--ink);
}
.essay-card .body .desc {
  font-size: var(--size-small);
  color: var(--ink-70);
  line-height: 1.55;
  margin: 0;
  max-width: 50ch;
}
.essay-card .meta {
  font-family: var(--font-mono);
  font-size: var(--size-eyebrow);
  letter-spacing: var(--track-eyebrow);
  text-transform: uppercase;
  color: var(--ink-30);
  white-space: nowrap;
}
@media (max-width: 640px) {
  .essay-card { grid-template-columns: 3rem 1fr; }
  .essay-card .meta { grid-column: 2; font-size: 0.58rem; margin-top: 0.4em; }
}

/* ─── doorways (home page) ─── */
.doorways {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  margin: 3rem 0 6rem;
}
.doorway {
  padding: 2rem 0;
  border-top: 1px solid var(--ink-6);
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 2rem;
  align-items: baseline;
  transition: background 200ms;
}
.doorway:last-child { border-bottom: 1px solid var(--ink-6); }
.doorway:hover { background: var(--ink-3); padding-left: 0.5rem; padding-right: 0.5rem; }
.doorway .name {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: var(--size-lead);
  color: var(--ink);
  margin: 0 0 0.4rem;
  line-height: 1.25;
}
.doorway .desc {
  font-size: var(--size-small);
  color: var(--ink-70);
  margin: 0;
  max-width: 56ch;
}
.doorway .arrow {
  font-family: var(--font-mono);
  font-size: var(--size-eyebrow);
  letter-spacing: var(--track-eyebrow);
  color: var(--ember);
  align-self: center;
}

/* ─── footer ─── */
footer.site {
  max-width: var(--measure-wide);
  margin: 6rem auto 0;
  padding: 3rem 1.75rem 4rem;
  border-top: 1px solid var(--ink-6);
  font-family: var(--font-mono);
  font-size: var(--size-eyebrow);
  letter-spacing: var(--track-eyebrow);
  text-transform: uppercase;
  color: var(--ink-30);
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
  justify-content: space-between;
}
footer.site .line { margin: 0; }
footer.site .line strong { color: var(--ink-50); font-weight: 400; }

/* ─── responsive ─── */
@media (max-width: 720px) {
  main { padding: 3.5rem 1.1rem 8rem; }
  .topnav { padding: 0.7rem 1rem; gap: 1rem; font-size: 0.58rem; }
}

/* ─── accessibility — reduced motion ─── */
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
}