@import url('https://fonts.googleapis.com/css2?family=Newsreader:opsz,wght@6..72,400;6..72,500;6..72,600;6..72,700&family=IBM+Plex+Sans:wght@400;500;600;700&display=swap');

:root {
  --paper-page-width: 52rem;
  --paper-content-width: 48rem;
  --paper-title-width: 31ch;
  --paper-summary-width: 68ch;
}

body.research-paper-page {
  min-height: 100vh;
  color: #171411;
}

.paper-topnav {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(14px);
}

.paper-topnav__inner {
  max-width: var(--paper-page-width);
  height: 3rem;
  margin: 0 auto;
  padding: 0 0.95rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.paper-topnav__inner a {
  color: var(--ink-soft);
  font-family: 'IBM Plex Sans', system-ui, sans-serif;
  font-size: 0.84rem;
  text-decoration: none;
}

.paper-topnav__inner a:hover {
  color: var(--accent);
}

.paper-shell {
  max-width: var(--paper-page-width);
  margin: 0 auto;
  padding: 2.1rem 0.95rem 2.8rem;
}

.paper-breadcrumb {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  margin-bottom: 1.1rem;
  color: var(--muted);
  font-family: 'IBM Plex Sans', system-ui, sans-serif;
  font-size: 0.84rem;
  text-decoration: none;
}

.paper-breadcrumb:hover {
  color: var(--accent);
}

.paper-header {
  display: grid;
  gap: 1rem;
  margin-bottom: 1.2rem;
  max-width: var(--paper-content-width);
}

.paper-kicker {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  flex-wrap: wrap;
  margin: 0;
  color: var(--muted);
  font-family: 'IBM Plex Sans', system-ui, sans-serif;
  font-size: 0.76rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.status-chip {
  display: inline-flex;
  align-items: center;
  padding: 0.18rem 0.58rem;
  border: 1px solid rgba(122, 88, 60, 0.22);
  border-radius: 999px;
  background: #efe1ce;
  color: #7a583c;
  font-size: 0.68rem;
  letter-spacing: 0.06em;
}

.paper-title {
  margin: 0;
  max-width: min(100%, var(--paper-title-width));
  font-family: 'Newsreader', Georgia, serif;
  font-size: clamp(2.1rem, 4vw, 3.2rem);
  font-weight: 600;
  letter-spacing: -0.04em;
  line-height: 0.95;
  text-wrap: balance;
  overflow-wrap: anywhere;
  hyphens: auto;
}

.paper-subtitle {
  max-width: 40rem;
  margin: 0;
  color: var(--ink-soft);
  font-family: 'IBM Plex Sans', system-ui, sans-serif;
  font-size: 1rem;
  line-height: 1.62;
  overflow-wrap: anywhere;
}

.paper-actions {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  flex-wrap: wrap;
  margin-top: 0.2rem;
}

.paper-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.6rem;
  padding: 0.65rem 0.95rem;
  border: 1px solid rgba(184, 160, 133, 0.44);
  border-radius: 999px;
  background: rgba(255, 252, 247, 0.78);
  color: var(--ink-soft);
  font-family: 'IBM Plex Sans', system-ui, sans-serif;
  font-size: 0.84rem;
  font-weight: 500;
  text-decoration: none;
  box-shadow: 0 8px 20px rgba(73, 48, 15, 0.04);
}

.paper-action:hover {
  color: var(--accent);
  border-color: var(--line-strong);
  background: rgba(255, 253, 249, 0.96);
  transform: translateY(-1px);
}

.paper-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.95rem;
  align-items: start;
  max-width: var(--paper-content-width);
  margin: 0 auto;
}

.paper-card {
  border: 1px solid rgba(184, 160, 133, 0.42);
  border-radius: 28px;
  background: linear-gradient(180deg, rgba(255, 253, 249, 0.84) 0%, rgba(249, 242, 232, 0.76) 100%);
  box-shadow: var(--card-shadow);
  box-sizing: border-box;
  min-width: 0;
  width: 100%;
  overflow: hidden;
}

.paper-main {
  padding: 1.35rem;
  width: 100%;
}

.paper-main h2,
.paper-side h2 {
  margin: 0 0 0.8rem;
  color: var(--accent);
  font-family: 'IBM Plex Sans', system-ui, sans-serif;
  font-size: 0.76rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.paper-summary-text {
  margin: 0;
  max-width: min(100%, var(--paper-summary-width));
  color: var(--ink-soft);
  font-family: 'Newsreader', Georgia, serif;
  font-size: 1.18rem;
  line-height: 1.72;
  overflow-wrap: anywhere;
  text-wrap: pretty;
}

.paper-summary-text + .paper-summary-text {
  margin-top: 1rem;
}

.paper-figure {
  margin-top: 1.4rem;
  padding: 1rem;
  border: 1px solid rgba(184, 160, 133, 0.34);
  border-radius: 22px;
  background: rgba(255, 251, 245, 0.72);
  box-sizing: border-box;
  max-width: 100%;
}

.paper-figure img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid rgba(184, 160, 133, 0.28);
  border-radius: 16px;
  background: #fff;
}

.paper-figure figcaption {
  margin-top: 0.8rem;
  color: var(--muted);
  font-family: 'IBM Plex Sans', system-ui, sans-serif;
  font-size: 0.84rem;
  line-height: 1.55;
}

.paper-side {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.95rem;
  width: 100%;
  min-width: 0;
}

.paper-side-card {
  padding: 1.1rem;
  width: 100%;
}

.fact-list {
  display: grid;
  gap: 0.9rem;
  margin: 0;
  min-width: 0;
}

.fact-list dt {
  margin: 0 0 0.22rem;
  color: var(--muted);
  font-family: 'IBM Plex Sans', system-ui, sans-serif;
  font-size: 0.73rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.fact-list dd {
  margin: 0;
  color: var(--ink-soft);
  font-family: 'IBM Plex Sans', system-ui, sans-serif;
  font-size: 0.95rem;
  line-height: 1.6;
  overflow-wrap: anywhere;
}

.citation-text,
.availability-note {
  margin: 0;
  color: var(--ink-soft);
  font-family: 'IBM Plex Sans', system-ui, sans-serif;
  font-size: 0.93rem;
  line-height: 1.62;
  overflow-wrap: anywhere;
}

.citation-pre {
  margin: 0.85rem 0 0;
  padding: 1rem;
  width: 100%;
  max-width: 100%;
  overflow-x: auto;
  border: 1px solid rgba(35, 41, 47, 0.25);
  border-radius: 18px;
  background: #23282f;
  color: #f3ede4;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.76rem;
  line-height: 1.6;
  box-sizing: border-box;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  word-break: break-word;
}

.paper-footer {
  max-width: var(--paper-page-width);
  margin: 0 auto;
  padding: 0 0.95rem 2.2rem;
  color: var(--muted);
  font-family: 'IBM Plex Sans', system-ui, sans-serif;
  font-size: 0.79rem;
}

.paper-footer a {
  color: var(--accent);
}

@media (max-width: 700px) {
  .paper-side {
    grid-template-columns: 1fr;
  }

  .paper-header,
  .paper-layout,
  .paper-main,
  .paper-side,
  .paper-side-card,
  .paper-title,
  .paper-summary-text {
    max-width: none;
  }
}

@media (max-width: 640px) {
  .paper-shell {
    padding: 1.3rem 0.8rem 2rem;
  }

  .paper-title {
    font-size: clamp(1.72rem, 7.2vw, 2.3rem);
    max-width: none;
  }

  .paper-subtitle {
    font-size: 0.94rem;
  }

  .paper-main {
    padding: 1rem;
  }

  .paper-side-card {
    padding: 0.95rem;
  }

  .paper-summary-text {
    font-size: 1.02rem;
    line-height: 1.62;
  }

  .paper-action {
    min-height: 2.45rem;
    padding: 0.58rem 0.84rem;
    font-size: 0.8rem;
  }
}