/* Hand-authored - not part of the grunt/base.css pipeline described in RUNBOOK.md.
   See CLAUDE.md "CSS build" for which pipeline governs which files. */

:root {
  --font-display: "Oxanium", "Eurostile", "Bank Gothic", sans-serif;
  --font-body: "Space Grotesk", "Avenir Next", "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", "SFMono-Regular", "Menlo", monospace;
  --paper: #070810;
  --surface: rgba(14, 16, 27, 0.82);
  --ink: #e8e8dc;
  --text-soft: #aeb7af;
  --muted: #89978f;
  --line: rgba(203, 195, 224, 0.15);
  --signal: #b49bdd;
  --signal-ink: #0d0914;
  --signal-soft: rgba(180, 155, 221, 0.15);
  --gold: #d9b36c;
  --shadow: 0 30px 100px rgba(0, 0, 0, 0.42);
  --radius: 28px;
  --page-width: 1220px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  margin: 0;
  color: var(--ink);
  font-family: var(--font-body);
  background:
    radial-gradient(circle at 8% 0%, rgba(104, 54, 145, 0.4), transparent 32%),
    radial-gradient(circle at 92% 6%, rgba(78, 101, 145, 0.24), transparent 27%),
    radial-gradient(circle at 55% 42%, rgba(44, 30, 73, 0.2), transparent 36%),
    linear-gradient(180deg, #05060b 0%, var(--paper) 72%);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(rgba(180, 155, 221, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(180, 155, 221, 0.04) 1px, transparent 1px);
  background-size: 32px 32px;
  mask-image: linear-gradient(180deg, #000, transparent 82%);
  pointer-events: none;
}

.star-field {
  position: fixed;
  inset: 0;
  z-index: 0;
  overflow: hidden;
  pointer-events: none;
  contain: strict;
}

.star {
  --star-size: 2px;
  --star-peak: 0.72;
  --star-drift: -3px;
  position: absolute;
  left: var(--star-x);
  top: var(--star-y);
  width: var(--star-size);
  aspect-ratio: 1;
  border-radius: 50%;
  background: var(--star-color);
  box-shadow: 0 0 calc(var(--star-size) * 5) color-mix(in srgb, var(--star-color) 55%, transparent);
  opacity: 0.24;
  animation: star-twinkle var(--star-duration) var(--star-delay) ease-in-out infinite;
}

@keyframes star-twinkle {
  0%, 100% { opacity: 0.16; transform: translate3d(0, 0, 0) scale(0.78); }
  38% { opacity: var(--star-peak); transform: translate3d(0, var(--star-drift), 0) scale(1); }
  54% { opacity: var(--star-peak); transform: translate3d(0, var(--star-drift), 0) scale(0.94); }
  72% { opacity: 0.24; transform: translate3d(0, 0, 0) scale(0.84); }
}

a {
  color: inherit;
  text-decoration: none;
}

a:focus-visible,
button:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--signal) 68%, white);
  outline-offset: 3px;
}

.page-shell {
  position: relative;
  z-index: 1;
  width: min(calc(100% - 2rem), var(--page-width));
  margin: 0 auto;
  padding: 1rem 0 2rem;
}

.panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  backdrop-filter: blur(14px);
}

/* Header */

.site-header {
  position: sticky;
  top: 1rem;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 1.25rem;
}

.masthead {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.wordmark {
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 2.6vw, 2.4rem);
  line-height: 0.95;
  font-weight: 500;
}

.top-nav {
  display: flex;
  gap: 1.25rem;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.top-nav a:hover {
  color: var(--signal);
}

.site-main {
  display: grid;
  gap: 1.25rem;
  margin-top: 1.25rem;
}

.site-main > section {
  scroll-margin-top: 8.5rem;
}

.section-label {
  margin: 0;
  color: var(--gold);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* Hero (homepage) */

.hero {
  min-height: min(560px, calc(100vh - 8rem));
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(320px, 0.75fr);
  gap: clamp(1.2rem, 3vw, 2.5rem);
  padding: clamp(1.4rem, 3vw, 2.5rem);
  background:
    radial-gradient(circle at 10% 15%, rgba(111, 63, 152, 0.14), transparent 30%),
    linear-gradient(145deg, rgba(18, 19, 32, 0.93), rgba(9, 12, 20, 0.9));
}

.hero-copy {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 3rem;
  padding: 0.4rem 0;
}

.hero h1 {
  max-width: 13ch;
  margin: 0.8rem 0 0;
  font-family: var(--font-display);
  font-weight: 500;
  line-height: 0.98;
  letter-spacing: -0.035em;
  font-size: clamp(2.8rem, 5.6vw, 4.6rem);
}

.hero-bottom {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: end;
  gap: 1.5rem;
}

.hero-lead {
  max-width: 48ch;
  margin: 0;
  color: var(--text-soft);
  font-size: 1.02rem;
  line-height: 1.68;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  min-height: 3.15rem;
  padding: 0.9rem 1.4rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  white-space: nowrap;
  transition: transform 180ms ease;
}

.button:hover {
  transform: translateY(-2px);
}

.button-primary {
  color: var(--signal-ink);
  background: var(--signal);
  box-shadow: 0 12px 30px var(--signal-soft);
}

.button-secondary {
  color: var(--ink);
  background: rgba(255, 255, 255, 0.035);
}

.cover-card {
  position: relative;
  min-height: 420px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 1.4rem;
  color: var(--ink);
  background:
    radial-gradient(circle at 85% 26%, rgba(185, 200, 226, 0.2), transparent 22%),
    radial-gradient(circle at 15% 82%, rgba(111, 63, 152, 0.46), transparent 34%),
    linear-gradient(145deg, #171426 0%, #101b2c 58%, #2a1d3e 100%);
  border-radius: calc(var(--radius) - 4px);
  border: 1px solid rgba(180, 155, 221, 0.22);
  box-shadow: inset 0 0 70px rgba(2, 4, 8, 0.35);
  isolation: isolate;
}

.cover-grid {
  position: absolute;
  inset: 0;
  z-index: -1;
  opacity: 0.32;
  background-image:
    radial-gradient(circle at 18% 20%, #f2dfae 0 1.3px, transparent 1.8px),
    radial-gradient(circle at 68% 12%, #f2f1e7 0 1px, transparent 1.5px),
    radial-gradient(circle at 37% 64%, #b49bdd 0 1px, transparent 1.5px),
    linear-gradient(rgba(180, 155, 221, 0.13) 1px, transparent 1px),
    linear-gradient(90deg, rgba(180, 155, 221, 0.13) 1px, transparent 1px);
  background-size: 180px 210px, 230px 170px, 270px 250px, 42px 42px, 42px 42px;
  mask-image: linear-gradient(180deg, #000, transparent 88%);
}

.cover-head,
.cover-foot {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin: 0;
}

.cover-head p,
.cover-foot p {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.cover-title {
  display: grid;
  gap: 0.7rem;
}

.cover-mark {
  margin: 0;
  color: transparent;
  font-family: var(--font-display);
  font-size: clamp(5rem, 12vw, 9rem);
  font-weight: 500;
  line-height: 0.65;
  letter-spacing: -0.08em;
  -webkit-text-stroke: 1px rgba(180, 155, 221, 0.34);
}

.cover-card h2 {
  max-width: 9ch;
  margin: 0;
  font-family: var(--font-display);
  font-weight: 500;
  line-height: 0.98;
  letter-spacing: -0.035em;
  font-size: clamp(2rem, 3.6vw, 3rem);
}

.cover-foot {
  align-items: end;
  font-size: 0.9rem;
}

.about-teaser {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  flex-wrap: wrap;
  padding: clamp(1.5rem, 3vw, 2.5rem);
}

.about-teaser p:last-child {
  margin: 0.5rem 0 0;
  color: var(--text-soft);
  max-width: 56ch;
}

/* Whitepapers index / collection */

.collection-section {
  padding: clamp(1.5rem, 4vw, 3rem) clamp(0rem, 1vw, 0.5rem);
}

.collection-heading {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 0.65fr);
  align-items: end;
  gap: 2rem;
  margin-bottom: clamp(2rem, 4vw, 3rem);
}

.collection-heading h2 {
  margin: 0.65rem 0 0;
  font-family: var(--font-display);
  font-weight: 500;
  line-height: 0.98;
  letter-spacing: -0.035em;
  font-size: clamp(2.2rem, 4.4vw, 3.6rem);
}

.collection-note {
  max-width: 49ch;
  margin: 0;
  color: var(--text-soft);
  font-size: 1.02rem;
  line-height: 1.68;
}

.collection-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(330px, 0.85fr);
  align-items: start;
  gap: 1.25rem;
}

.paper-index {
  border-top: 1px solid var(--line);
}

.paper-row {
  width: 100%;
  display: grid;
  grid-template-columns: 2.2rem minmax(0, 1fr) auto 1.5rem;
  align-items: center;
  gap: 1rem;
  padding: 1.35rem 0.65rem;
  color: var(--ink);
  text-align: left;
  background: transparent;
  border: 0;
  border-bottom: 1px solid var(--line);
  cursor: pointer;
  transition: color 180ms ease, background-color 180ms ease, padding 180ms ease;
}

.paper-row:hover,
.paper-row.is-active {
  padding-left: 1rem;
  color: var(--signal);
  background: linear-gradient(90deg, var(--signal-soft), rgba(255, 255, 255, 0.015));
}

.paper-row-copy {
  display: grid;
  gap: 0.35rem;
}

.paper-row-copy strong {
  font-family: var(--font-display);
  font-size: clamp(1.3rem, 2.2vw, 1.9rem);
  font-weight: 500;
  line-height: 1;
  letter-spacing: -0.03em;
}

.paper-number,
.paper-meta,
.paper-topic {
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.paper-row.is-active .paper-number,
.paper-row.is-active .paper-meta,
.paper-row.is-active .paper-topic {
  color: var(--signal);
}

.paper-row-meta {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.4rem;
}

.paper-row-read {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  color: var(--signal);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  opacity: 0.75;
  cursor: pointer;
  transition: opacity 150ms ease;
}

.paper-row-read .icon-eye {
  flex-shrink: 0;
}

.paper-row-read:hover,
.paper-row-read:focus-visible {
  opacity: 1;
  text-decoration: underline;
}

.paper-arrow {
  font-size: 1.2rem;
  opacity: 0;
  transform: translate(-5px, 5px);
  transition: opacity 180ms ease, transform 180ms ease;
}

.paper-row:hover .paper-arrow,
.paper-row.is-active .paper-arrow {
  opacity: 1;
  transform: translate(0, 0);
}

.paper-detail {
  position: sticky;
  top: 8.6rem;
  overflow: hidden;
  padding: 1.4rem;
  background:
    radial-gradient(circle at 85% 10%, color-mix(in srgb, var(--paper-accent, var(--signal)) 16%, transparent), transparent 28%),
    linear-gradient(145deg, rgba(18, 21, 32, 0.97), rgba(8, 11, 18, 0.96));
}

.paper-detail::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 5px;
  background: var(--paper-accent, var(--signal));
}

.detail-head {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
}

.detail-year {
  margin: 0;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.75rem;
}

.detail-mark {
  margin: 1.6rem 0 0.6rem;
  color: transparent;
  font-family: var(--font-display);
  font-size: clamp(4.5rem, 9vw, 7rem);
  line-height: 0.7;
  letter-spacing: -0.08em;
  -webkit-text-stroke: 1px color-mix(in srgb, var(--paper-accent, var(--signal)) 34%, transparent);
}

.paper-detail h3 {
  max-width: 12ch;
  margin: 0;
  font-family: var(--font-display);
  font-weight: 500;
  line-height: 0.98;
  letter-spacing: -0.035em;
  font-size: clamp(1.8rem, 3.2vw, 2.6rem);
}

.detail-summary {
  margin: 1.2rem 0;
  color: var(--text-soft);
  font-size: 1rem;
  line-height: 1.6;
}

.detail-meta {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.8rem;
  margin: 1.5rem 0;
}

.detail-meta div {
  padding-top: 0.75rem;
  border-top: 1px solid var(--line);
}

.detail-meta dt {
  margin: 0;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.detail-meta dd {
  margin: 0.4rem 0 0;
  font-size: 0.95rem;
  font-weight: 600;
}

.detail-action {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 1.1rem;
  color: #0d0914;
  background: var(--paper-accent, var(--signal));
  border: 0;
  border-radius: 999px;
  cursor: pointer;
  font-weight: 600;
  transition: filter 180ms ease, transform 180ms ease;
}

.detail-action:hover {
  filter: brightness(1.1);
  transform: translateY(-2px);
}

/* About */

.about-section {
  overflow: hidden;
  display: grid;
  grid-template-columns: minmax(260px, 0.72fr) minmax(0, 1.28fr);
  align-items: center;
  gap: clamp(2.5rem, 6vw, 5rem);
  padding: clamp(1.5rem, 3.2vw, 2.8rem);
  background:
    radial-gradient(circle at 12% 18%, rgba(180, 155, 221, 0.13), transparent 28%),
    radial-gradient(circle at 90% 85%, rgba(217, 179, 108, 0.07), transparent 24%),
    linear-gradient(145deg, rgba(17, 19, 31, 0.96), rgba(8, 11, 18, 0.94));
}

.about-visual {
  display: grid;
  gap: 2rem;
  justify-items: center;
}

.portrait-frame {
  position: relative;
  width: min(100%, 280px);
  aspect-ratio: 1;
}

.portrait-frame::before {
  content: "";
  position: absolute;
  inset: -18px;
  z-index: -1;
  border: 1px solid rgba(180, 155, 221, 0.34);
  border-radius: 50%;
  box-shadow: 0 0 0 12px rgba(180, 155, 221, 0.035), 0 0 70px rgba(111, 63, 152, 0.2);
  transform: rotate(-10deg) scaleY(0.88);
}

.portrait-frame::after {
  content: "";
  position: absolute;
  top: 7%;
  right: 4%;
  width: 12px;
  aspect-ratio: 1;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 0 5px rgba(217, 179, 108, 0.1), 0 0 22px rgba(217, 179, 108, 0.45);
}

.portrait-frame img {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
  border: 1px solid rgba(180, 155, 221, 0.26);
  border-radius: 46% 46% 42% 42%;
  filter: saturate(0.82) contrast(1.04);
}

.profile-facts {
  width: 100%;
  display: grid;
  gap: 0;
  margin: 0;
  border-top: 1px solid var(--line);
}

.profile-facts div {
  display: grid;
  grid-template-columns: 7rem minmax(0, 1fr);
  gap: 1rem;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--line);
}

.profile-facts dt,
.profile-facts dd {
  margin: 0;
}

.profile-facts dt {
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.profile-facts dd {
  color: var(--ink);
  font-size: 0.9rem;
}

.about-content h2 {
  max-width: 11ch;
  margin: 0.65rem 0 1.5rem;
  font-family: var(--font-display);
  font-weight: 500;
  line-height: 0.98;
  letter-spacing: -0.04em;
  font-size: clamp(2.2rem, 4.4vw, 3.8rem);
}

.about-copy {
  display: grid;
  gap: 1rem;
}

.about-copy p {
  margin: 0;
  color: var(--text-soft);
  font-size: 1rem;
  line-height: 1.72;
}

.about-copy p:nth-of-type(2) {
  padding: 1rem 1.1rem;
  color: var(--ink);
  background: linear-gradient(90deg, rgba(180, 155, 221, 0.11), transparent);
  border-left: 3px solid var(--signal);
}

.about-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.about-social {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  margin-top: 1.35rem;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.about-social a:hover {
  color: var(--signal);
}

/* Footer */

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.5rem 0 0;
  color: var(--muted);
  font-size: 0.85rem;
}

.site-footer p {
  margin: 0;
}

/* Reveal-on-scroll */

.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 620ms ease, transform 620ms ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Paper reader */

.reading-progress {
  position: fixed;
  inset: 0 0 auto;
  z-index: 100;
  height: 3px;
  background: rgba(255, 255, 255, 0.035);
  pointer-events: none;
}

.reading-progress span {
  display: block;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, var(--signal), var(--gold));
  box-shadow: 0 0 12px var(--signal-soft);
  transform: scaleX(0);
  transform-origin: left center;
}

.paper-shell {
  --page-width: 1280px;
}

.paper-main {
  display: grid;
  gap: 1.25rem;
  margin-top: 1.25rem;
}

.paper-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(300px, 0.75fr);
  align-items: stretch;
  gap: clamp(1.5rem, 4vw, 3rem);
  padding: clamp(1.5rem, 3.5vw, 2.8rem);
  background:
    radial-gradient(circle at 15% 18%, rgba(180, 155, 221, 0.16), transparent 31%),
    radial-gradient(circle at 86% 80%, rgba(217, 179, 108, 0.07), transparent 25%),
    linear-gradient(145deg, rgba(17, 19, 31, 0.96), rgba(7, 10, 17, 0.94));
}

.paper-hero-copy {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.paper-hero h1 {
  max-width: 13ch;
  margin: 1rem 0 0;
  font-family: var(--font-display);
  font-weight: 500;
  line-height: 0.96;
  letter-spacing: -0.045em;
  font-size: clamp(2.6rem, 5vw, 4.4rem);
}

.paper-subtitle {
  margin: 1rem 0 0;
  color: var(--signal);
  font-family: var(--font-display);
  font-size: clamp(1.2rem, 2vw, 1.6rem);
  letter-spacing: -0.02em;
}

.paper-deck {
  max-width: 58ch;
  margin: 1.6rem 0 0;
  color: var(--text-soft);
  font-size: clamp(1rem, 1.5vw, 1.15rem);
  line-height: 1.7;
}

.paper-byline {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
  margin-top: 1.6rem;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
}

.paper-byline p {
  margin: 0;
}

.paper-byline span {
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.paper-cover-mini {
  position: relative;
  min-height: 340px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 1.4rem;
  background:
    radial-gradient(circle at 80% 28%, rgba(185, 200, 226, 0.19), transparent 22%),
    radial-gradient(circle at 18% 84%, rgba(111, 63, 152, 0.5), transparent 37%),
    linear-gradient(145deg, #171426 0%, #101b2c 58%, #2a1d3e 100%);
  border: 1px solid rgba(180, 155, 221, 0.22);
  border-radius: calc(var(--radius) - 4px);
  box-shadow: inset 0 0 80px rgba(2, 4, 8, 0.42);
}

.cover-index {
  margin: 0;
  color: var(--gold);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.paper-cover-mark {
  color: transparent;
  font-family: var(--font-display);
  font-size: clamp(5.5rem, 11vw, 8rem);
  font-weight: 500;
  line-height: 0.65;
  letter-spacing: -0.09em;
  -webkit-text-stroke: 1px rgba(180, 155, 221, 0.38);
}

.paper-cover-mini dl {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.7rem;
  margin: 0;
}

.paper-cover-mini dl div {
  padding-top: 0.75rem;
  border-top: 1px solid rgba(255, 255, 255, 0.13);
}

.paper-cover-mini dt,
.paper-cover-mini dd {
  margin: 0;
}

.paper-cover-mini dt {
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.paper-cover-mini dd {
  margin-top: 0.4rem;
  font-weight: 600;
  font-size: 0.9rem;
}

.paper-layout {
  display: grid;
  grid-template-columns: 235px minmax(0, 1fr);
  align-items: start;
  gap: clamp(2rem, 5vw, 4rem);
  padding: clamp(2rem, 5vw, 4rem) clamp(0rem, 2vw, 1.5rem);
}

.paper-rail {
  align-self: stretch;
}

.paper-toc {
  position: sticky;
  top: 8.6rem;
  padding: 1.2rem;
  background: rgba(12, 14, 24, 0.82);
}

.paper-toc ul {
  display: grid;
  gap: 0.2rem;
  margin: 1rem 0 0;
  padding: 0;
  list-style: none;
}

.paper-toc ul ul {
  margin: 0.2rem 0 0.2rem 0.9rem;
}

.paper-toc a {
  display: block;
  padding: 0.4rem 0;
  color: var(--muted);
  font-size: 0.85rem;
  line-height: 1.35;
  border-bottom: 1px solid transparent;
  transition: color 180ms ease, border-color 180ms ease, padding-left 180ms ease;
}

.paper-toc ul ul a {
  font-size: 0.78rem;
}

.paper-toc a:hover,
.paper-toc a.is-active {
  padding-left: 0.3rem;
  color: var(--signal);
  border-bottom-color: var(--line);
}

.paper-article {
  min-width: 0;
  max-width: 850px;
  /* The paper's own section numbering starts at "0.", so start the counter one
     below zero: the first h2 increments it to 0, showing "00" to match. */
  counter-reset: section -1;
}

.paper-article h2 {
  position: relative;
  counter-increment: section;
  max-width: 20ch;
  margin: 0;
  padding-top: 3.2rem;
  border-top: 1px solid var(--line);
  font-family: var(--font-display);
  font-size: clamp(2rem, 3.6vw, 3.2rem);
  font-weight: 500;
  line-height: 1.05;
  letter-spacing: -0.03em;
}

.paper-article > :first-child,
.paper-article h2:first-of-type {
  padding-top: 0;
  border-top: 0;
  margin-top: 0;
}

.paper-article h2::before {
  content: counter(section, decimal-leading-zero);
  display: block;
  margin-bottom: 0.6rem;
  color: var(--signal);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
}

.paper-article h2 + * {
  margin-top: 1.2rem;
}

.paper-article h2 ~ h2 {
  margin-top: 4.5rem;
}

.paper-article h3 {
  margin: 2.2rem 0 0.8rem;
  color: var(--signal);
  font-family: var(--font-display);
  font-size: clamp(1.2rem, 2vw, 1.5rem);
  font-weight: 500;
  letter-spacing: -0.01em;
}

.paper-article p,
.paper-article li {
  color: var(--text-soft);
  font-size: 1.02rem;
  line-height: 1.75;
}

.paper-article strong {
  color: var(--ink);
}

.paper-article ul,
.paper-article ol {
  padding-left: 1.3rem;
}

.paper-article li + li {
  margin-top: 0.6rem;
}

.paper-article hr {
  margin: 2.5rem 0;
  border: 0;
  border-top: 1px solid var(--line);
}

.paper-article blockquote {
  margin: 0;
  padding: 1.2rem 1.4rem;
  background: rgba(180, 155, 221, 0.05);
  border: 1px solid rgba(180, 155, 221, 0.19);
  border-left: 4px solid var(--signal);
  border-radius: 0 var(--radius) var(--radius) 0;
}

.paper-article blockquote p {
  margin: 0;
  color: var(--ink);
  font-size: 0.98rem;
}

.paper-article .position-callout {
  padding: 1.4rem 1.5rem;
  background: radial-gradient(circle at 100% 0, rgba(180, 155, 221, 0.13), transparent 35%), rgba(180, 155, 221, 0.05);
  border: 1px solid rgba(180, 155, 221, 0.19);
  border-left: 4px solid var(--signal);
  border-radius: 0 var(--radius) var(--radius) 0;
}

.paper-article .position-callout p {
  margin: 0;
  color: var(--ink);
  font-family: var(--font-display);
  font-size: clamp(1.1rem, 2vw, 1.4rem);
  line-height: 1.35;
}

.table-wrap {
  overflow-x: auto;
  margin: 1.8rem 0;
  background: rgba(12, 14, 24, 0.78);
  border-radius: 18px;
}

.paper-article table {
  width: 100%;
  min-width: 600px;
  border-collapse: collapse;
  text-align: left;
}

.paper-article th,
.paper-article td {
  padding: 0.9rem 1rem;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
  font-size: 0.92rem;
  line-height: 1.55;
}

.paper-article thead th {
  color: var(--gold);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.paper-article tbody th {
  color: var(--ink);
  font-family: var(--font-display);
  font-weight: 500;
}

.paper-article tbody td {
  color: var(--text-soft);
}

.paper-article tbody tr:last-child th,
.paper-article tbody tr:last-child td {
  border-bottom: 0;
}

.paper-article pre {
  overflow-x: auto;
  margin: 1.8rem 0;
  padding: 1.2rem 1.3rem;
  background: #090b13;
  border: 1px solid rgba(180, 155, 221, 0.2);
  border-radius: 18px;
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.28);
}

.paper-article pre code {
  color: #c9cedb;
  font-family: var(--font-mono);
  font-size: clamp(0.72rem, 1.3vw, 0.82rem);
  line-height: 1.65;
}

.paper-article code {
  font-family: var(--font-mono);
}

.paper-endmark {
  margin-top: 3rem;
  padding-top: 1rem;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-align: right;
  border-top: 1px solid var(--line);
}

.paper-footer {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 2rem;
  padding: clamp(1.5rem, 3vw, 2.5rem);
}

.paper-footer h2 {
  max-width: 15ch;
  margin: 0.6rem 0 0;
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3.6vw, 3rem);
  font-weight: 500;
  line-height: 1;
}

/* Responsive */

@media (max-width: 1020px) {
  .hero,
  .collection-heading,
  .collection-layout,
  .about-section,
  .paper-hero,
  .paper-layout {
    grid-template-columns: 1fr;
  }

  .site-header {
    align-items: flex-start;
    flex-direction: column;
  }

  .paper-toc {
    position: relative;
    top: auto;
  }
}

@media (max-width: 720px) {
  .page-shell {
    width: min(calc(100% - 1rem), var(--page-width));
  }

  .site-header {
    position: relative;
    top: auto;
  }

  .top-nav {
    gap: 1rem;
  }

  .hero,
  .about-section,
  .paper-hero {
    border-radius: 22px;
  }

  .paper-meta {
    display: none;
  }

  .detail-meta {
    grid-template-columns: 1fr;
  }

  .about-actions {
    display: grid;
  }

  .site-footer {
    flex-direction: column;
  }
}

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

  *, *::before, *::after {
    animation: none !important;
    transition: none !important;
  }
}