/* Manhattan Reasoning — research vision
   Layers on css/style.css and inherits every brand token from its :root.

   One column of text with a section rail beside it. The column is the reading
   measure, and the hero, the prose, the figures and the captions all share its
   two edges. Nothing else: this is a paper, and the job is to read it. */

:root {
  --measure: 80ch;          /* body copy line length */
  --read-gap: clamp(28px, 5vw, 64px);
  /* the hero and the reading block share one left edge and one right edge */
  --read-w: calc(var(--rail-w) + var(--read-gap) + var(--measure) + 48px);
  --plate: #ffffff;
  --rail-w: 172px;
}

/* ---------------- hero: a journal front page -----------------------------
   Title, byline and route in the left column; the paper's own abstract in the
   right, ruled off in the brand blue. */

.paper-hero {
  padding: 152px 0 76px;
  border-bottom: 1px solid var(--line);
}
.paper-hero .container {
  max-width: var(--read-w);
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
  gap: clamp(28px, 3.6vw, 52px);
  align-items: start;
}
.paper-hero .eyebrow {
  font-family: var(--mono);
  font-size: 0.76rem;
  color: var(--ink-3);
  letter-spacing: 0.02em;
}
.paper-hero h1 {
  margin-top: 14px;
  font-size: clamp(1.9rem, 3.3vw, 2.65rem);
  line-height: 1.08;
  letter-spacing: -0.024em;
  font-weight: 700;
  text-wrap: balance;
}
.paper-hero .subtitle {
  margin-top: 18px;
  font-size: clamp(1rem, 1.3vw, 1.12rem);
  line-height: 1.52;
  color: var(--ink-2);
}
.byline { margin-top: 30px; display: grid; gap: 3px; }
.byline .names { font-size: 0.98rem; font-weight: 600; color: var(--ink); }
.byline .affils { font-size: 0.87rem; color: var(--ink-3); line-height: 1.5; }
.hero-actions { margin-top: 26px; display: flex; gap: 12px; flex-wrap: wrap; }

.hero-abstract {
  border-left: 2px solid var(--accent);
  padding: 4px 0 4px 24px;
  scroll-margin-top: 88px;
  align-self: end;
}
.hero-abstract p { font-size: 0.99rem; line-height: 1.66; color: var(--ink-2); }
.hero-abstract p + p { margin-top: 16px; }

/* ---------------- reading layout ----------------------------------------- */

.read {
  max-width: var(--read-w);
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: var(--rail-w) minmax(0, var(--measure));
  gap: var(--read-gap);
  justify-content: center;
  align-items: start;
}

/* section rail — where you are in the argument */
.rail {
  position: sticky;
  top: 96px;
  padding: 74px 0 0;
  font-size: 0.85rem;
}
.rail ol { list-style: none; display: grid; gap: 2px; }
.rail a {
  display: grid;
  grid-template-columns: 1.7em minmax(0, 1fr);
  padding: 5px 0 5px 10px;
  color: var(--ink-3);
  border-left: 2px solid var(--line);
  line-height: 1.35;
  transition: color 0.15s ease, border-color 0.15s ease;
}
.rail a .n { font-family: var(--mono); font-size: 0.78rem; }
.rail a:hover { color: var(--ink-2); text-decoration: none; }
.rail a.current { color: var(--ink); border-left-color: var(--accent); font-weight: 600; }
.rail a.sub { grid-template-columns: 2.5em minmax(0, 1fr); font-size: 0.8rem; }

/* ---------------- prose ---------------------------------------------------- */

.prose { padding: 74px 0 0; min-width: 0; }

.prose section { scroll-margin-top: 88px; }
.prose section + section { margin-top: 72px; }
.prose [id] { scroll-margin-top: 88px; }

.prose h2 {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.5em;
  align-items: baseline;
  font-size: clamp(1.55rem, 2.6vw, 2.05rem);
  line-height: 1.15;
  letter-spacing: -0.018em;
  font-weight: 700;
}
.prose h2.plain { display: block; }
.prose h2 .num {
  font-family: var(--mono);
  font-size: 0.6em;
  font-weight: 500;
  color: var(--accent-ink);
}
.prose h3 {
  margin-top: 50px;
  font-size: 1.18rem;
  font-weight: 700;
  letter-spacing: -0.008em;
}
.prose h4 {
  margin-top: 34px;
  font-size: 1rem;
  font-weight: 600;
  color: var(--ink-2);
}
.prose p {
  margin-top: 18px;
  font-size: 1.09rem;
  line-height: 1.75;
  color: #24262c;
}
.prose h2 + p, .prose h3 + p, .prose h4 + p { margin-top: 14px; }
.prose strong { font-weight: 600; color: var(--ink); }
.prose a { color: var(--accent-ink); }
.prose a.btn { color: #fff; }
.prose a.btn.ghost { color: var(--ink); }
.prose code { font-family: var(--mono); font-size: 0.88em; color: var(--ink-2); }
.prose img, .prose pre, .prose table { max-width: 100%; }

/* contribution and research-question lists */
.prose ul.points { margin-top: 24px; display: grid; gap: 16px; list-style: none; }
.prose ul.points > li {
  position: relative;
  padding-left: 22px;
  font-size: 1.05rem;
  line-height: 1.7;
  color: var(--ink-2);
}
.prose ul.points > li::before {
  content: "";
  position: absolute;
  left: 0; top: 0.72em;
  width: 10px; height: 1.5px;
  background: var(--accent);
}
.prose ul.points > li b { color: var(--ink); font-weight: 600; }

/* block quotation — Nelson on transparency */
.prose blockquote {
  margin: 30px 0 0;
  padding-left: 22px;
  border-left: 2px solid var(--line);
}
.prose blockquote p { font-size: 1.09rem; line-height: 1.7; color: var(--ink-2); }
.prose blockquote cite {
  display: block;
  margin-top: 10px;
  font-style: normal;
  font-size: 0.84rem;
  color: var(--ink-3);
}

/* inline citation markers */
.cite {
  font-size: 0.76em;
  font-weight: 600;
  vertical-align: 0.32em;
  line-height: 0;
  color: var(--accent-ink);
  white-space: nowrap;
}
.cite a { color: inherit; }

/* ---------------- figure plates ------------------------------------------ */

.plate { margin: 44px 0 0; }
.plate-body {
  position: relative;
  background: var(--plate);
  border: 1px solid #eceae2;
  border-radius: 12px;
  padding: 20px 22px;
  overflow: hidden;
  box-shadow: 0 1px 2px rgba(20, 24, 40, 0.04),
              0 12px 32px -18px rgba(20, 24, 40, 0.14);
}
.plate-body img { display: block; width: 100%; height: auto; }
.plate figcaption {
  margin-top: 14px;
  font-size: 0.88rem;
  line-height: 1.62;
  color: var(--ink-2);
}
.plate figcaption .fignum { font-weight: 700; color: var(--ink); }

.plate.zoomable .plate-body { cursor: zoom-in; }
.plate.zoomable .plate-body:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
.zoom-hint {
  position: absolute;
  top: 10px; right: 12px;
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--ink-3);
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 2px 7px;
  opacity: 0;
  transition: opacity 0.15s ease;
  pointer-events: none;
}
.plate.zoomable .plate-body:hover .zoom-hint,
.plate.zoomable .plate-body:focus-visible .zoom-hint { opacity: 1; }
@media (hover: none) { .zoom-hint { opacity: 1; } }

.plate .code-card { border-radius: 12px; }
.plate .code-card pre { font-size: 0.8rem; line-height: 1.66; }

/* ---------------- references ---------------------------------------------- */

.refs { margin-top: 72px; }
.refs ol {
  margin-top: 24px;
  list-style: none;
  counter-reset: ref;
  display: grid;
  gap: 12px;
}
.refs li {
  counter-increment: ref;
  display: grid;
  grid-template-columns: 2.6em minmax(0, 1fr);
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--ink-2);
  scroll-margin-top: 96px;
}
.refs li::before {
  content: "[" counter(ref) "]";
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--ink-3);
  padding-top: 0.16em;
}
.refs li .t { color: var(--ink); }
.refs li a { overflow-wrap: anywhere; }
.refs li:target { background: rgba(0, 114, 255, 0.07); border-radius: 6px; }
.refs li:target::before { color: var(--accent-ink); }

/* closing call, then the paper's own footer strip */
.paper-close { margin-top: 44px; }
.paper-close .actions { display: flex; gap: 12px; flex-wrap: wrap; }
.paper-foot {
  margin-top: 72px;
  padding: 26px 0 8px;
  border-top: 1px solid var(--line);
  max-width: none;
  font-size: 0.88rem;
  color: var(--ink-3);
}

/* ---------------- reading progress ---------------------------------------- */

.progress {
  position: fixed;
  top: 0; left: 0;
  height: 2px;
  width: 0;
  background: var(--accent);
  z-index: 60;
}

/* ---------------- lightbox -------------------------------------------------- */

.lightbox {
  position: fixed;
  inset: 0;
  z-index: 100;
  background: rgba(23, 24, 28, 0.85);
  display: none;
  padding: 24px;
  overflow: auto;
  overscroll-behavior: contain;
}
.lightbox.open { display: block; }
.lightbox img {
  display: block;
  width: 100%;
  max-width: 1600px;
  height: auto;
  margin: 0 auto;
  background: #fff;
  border-radius: 10px;
  padding: 20px;
}
.lightbox-close {
  position: fixed;
  top: 18px; right: 20px;
  width: 40px; height: 40px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.28);
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
  font-size: 1.1rem;
  line-height: 1;
  cursor: pointer;
}
.lightbox-close:hover { background: rgba(255, 255, 255, 0.2); }

/* ---------------- responsive -------------------------------------------------- */

@media (max-width: 1040px) {
  .paper-hero { padding: 120px 0 56px; }
  .paper-hero .container { grid-template-columns: minmax(0, 1fr); }
  .hero-abstract { margin-top: 34px; align-self: start; }
  .read { grid-template-columns: minmax(0, 1fr); gap: 0; justify-content: stretch; }
  .rail {
    position: static;
    padding: 40px 0 26px;
    border-bottom: 1px solid var(--line);
  }
  .rail a.sub { display: none; }
  .prose { padding-top: 44px; }
  .prose section + section { margin-top: 56px; }
}

@media (max-width: 640px) {
  .read { padding: 0 16px; }
  .paper-hero .container { padding: 0 16px; }
  .prose p { font-size: 1.01rem; line-height: 1.7; }
  .hero-abstract { padding-left: 18px; }
  .hero-abstract p { font-size: 0.99rem; }
  .plate { margin-top: 32px; }
  .plate-body { padding: 14px; border-radius: 10px; }
  .refs li { grid-template-columns: 2.2em minmax(0, 1fr); }
}

@media (prefers-reduced-motion: reduce) {
  .rail a, .zoom-hint { transition: none; }
}