/* CaseMirror Research — public preprint pages (casemirror-xzydj)
   Palette and type come from styles.css tokens (main-app palette). */

.research-body {
  background: var(--color-paper);
  color: var(--color-ink);
}

.research-main {
  flex: 1;
  width: 100%;
  max-width: 1080px;
  margin: 0 auto;
  padding: var(--space-2xl) var(--space-lg) var(--space-3xl);
}

/* ---------- Shared: identifier handle (signature element) ---------- */

.research-id {
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
  font-family: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.75rem;
  letter-spacing: 0.02em;
  color: var(--color-burgundy);
  text-decoration: none;
  border-bottom: 1px dotted var(--color-burgundy-light);
}

.research-id::before {
  content: "";
  width: 0.45em;
  height: 0.45em;
  border-radius: 50%;
  background: var(--color-burgundy);
  box-shadow:
    0.9em -0.5em 0 -0.08em var(--color-burgundy-light),
    0.9em 0.5em 0 -0.08em var(--color-burgundy-light);
  margin-right: 1.1em;
}

.research-id:hover {
  border-bottom-style: solid;
}

/* ---------- Index hero ---------- */

.research-hero {
  max-width: 760px;
  margin-bottom: var(--space-3xl);
}

.research-eyebrow {
  font-family: var(--font-ui);
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-burgundy);
  margin: 0 0 var(--space-md);
}

.research-title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(2.25rem, 5vw, 3.5rem);
  line-height: 1.05;
  letter-spacing: -0.01em;
  color: var(--color-ink);
  margin: 0 0 var(--space-lg);
}

.research-title em {
  font-style: italic;
  font-weight: 500;
  color: var(--color-burgundy);
}

.research-thesis {
  font-family: var(--font-body);
  font-size: 1.1875rem;
  line-height: 1.65;
  color: var(--color-ink-light);
  margin: 0;
}

/* ---------- Index list ---------- */

.research-list-heading {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-md);
  border-bottom: 2px solid var(--color-ink);
  padding-bottom: var(--space-sm);
  margin-bottom: var(--space-lg);
}

.research-list-heading h2 {
  font-family: var(--font-ui);
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin: 0;
  color: var(--color-ink);
}

.research-count {
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 0.75rem;
  color: var(--color-ink-muted);
}

.research-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.research-card {
  display: grid;
  grid-template-columns: 168px 1fr;
  gap: var(--space-xl);
  padding: var(--space-xl) 0;
  border-bottom: 1px solid var(--color-border);
}

.research-card:last-child {
  border-bottom: none;
}

.research-thumb {
  display: block;
  position: relative;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  box-shadow:
    0 1px 0 var(--color-white),
    3px 3px 0 var(--color-paper-darker),
    4px 4px 0 var(--color-border);
  transition:
    transform var(--transition-base),
    box-shadow var(--transition-base);
}

.research-thumb img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 935 / 1210;
  object-fit: cover;
}

.research-thumb:hover {
  transform: translate(-1px, -1px);
  box-shadow:
    0 1px 0 var(--color-white),
    4px 4px 0 var(--color-paper-darker),
    6px 6px 0 var(--color-border);
}

.research-thumb-empty {
  aspect-ratio: 935 / 1210;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-style: italic;
  color: var(--color-ink-muted);
}

.research-card-body {
  min-width: 0;
}

.research-card-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-sm) var(--space-md);
  margin-bottom: var(--space-sm);
  font-family: var(--font-ui);
  font-size: 0.8125rem;
  color: var(--color-ink-muted);
}

.research-draft-badge {
  font-family: var(--font-ui);
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-burgundy);
  background: var(--color-paper-darker);
  padding: 0.15rem 0.5rem;
  border-radius: 3px;
}

.research-card-title {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 600;
  line-height: 1.25;
  margin: 0 0 var(--space-sm);
}

.research-card-title a {
  color: var(--color-ink);
  text-decoration: none;
}

.research-card-title a:hover {
  color: var(--color-burgundy);
}

.research-authors {
  font-family: var(--font-ui);
  font-size: 0.9375rem;
  color: var(--color-ink-light);
  margin: 0 0 var(--space-md);
}

.research-authors a {
  color: var(--color-ink-light);
  text-decoration: none;
  border-bottom: 1px solid var(--color-border);
}

.research-authors a:hover {
  color: var(--color-burgundy);
  border-bottom-color: var(--color-burgundy);
}

.research-card-excerpt {
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.6;
  color: var(--color-ink);
  margin: 0 0 var(--space-md);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.research-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  font-family: var(--font-ui);
  font-size: 0.875rem;
  font-weight: 500;
}

.research-links a {
  color: var(--color-burgundy);
  text-decoration: none;
}

.research-links a:hover {
  text-decoration: underline;
}

.research-links a[rel~="external"] {
  color: var(--color-sage);
}

.research-links a[rel~="external"]::after {
  content: " \2197";
  font-size: 0.8em;
}

.research-empty {
  font-family: var(--font-body);
  font-style: italic;
  color: var(--color-ink-muted);
  padding: var(--space-2xl) 0;
}

.research-error {
  font-family: var(--font-ui);
  color: var(--color-burgundy);
  padding: var(--space-lg);
  border: 1px solid var(--color-burgundy-light);
  border-radius: 6px;
  background: var(--color-white);
}

/* Skeleton */
.research-skeleton .skeleton-block {
  background: linear-gradient(
    90deg,
    var(--color-paper-darker) 25%,
    var(--color-border-light) 50%,
    var(--color-paper-darker) 75%
  );
  background-size: 200% 100%;
  animation: research-shimmer 1.5s infinite;
  border-radius: 3px;
}

@keyframes research-shimmer {
  0% {
    background-position: 200% 0;
  }
  100% {
    background-position: -200% 0;
  }
}

/* ---------- Paper page ---------- */

.paper-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 280px;
  gap: var(--space-3xl);
  align-items: start;
}

.paper-main {
  min-width: 0;
  max-width: var(--reader-width);
}

.paper-breadcrumb {
  font-family: var(--font-ui);
  font-size: 0.8125rem;
  margin-bottom: var(--space-lg);
}

.paper-breadcrumb a {
  color: var(--color-ink-muted);
  text-decoration: none;
}

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

.paper-title {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.01em;
  margin: var(--space-md) 0 var(--space-md);
  color: var(--color-ink);
}

.paper-authors {
  font-family: var(--font-ui);
  font-size: 1.0625rem;
  color: var(--color-ink-light);
  margin: 0 0 var(--space-xs);
}

.paper-authors a {
  color: var(--color-ink);
  text-decoration: none;
  border-bottom: 1px solid var(--color-border);
}

.paper-authors a:hover {
  color: var(--color-burgundy);
  border-bottom-color: var(--color-burgundy);
}

.paper-date {
  font-family: var(--font-ui);
  font-size: 0.875rem;
  color: var(--color-ink-muted);
  margin: 0 0 var(--space-2xl);
}

.paper-section {
  margin-bottom: var(--space-2xl);
}

.paper-section h2 {
  font-family: var(--font-ui);
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-burgundy);
  margin: 0 0 var(--space-md);
  padding-bottom: var(--space-xs);
  border-bottom: 1px solid var(--color-border);
}

.paper-prose p {
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.7;
  margin: 0 0 var(--space-md);
  color: var(--color-ink);
}

.paper-prose p:last-child {
  margin-bottom: 0;
}

.paper-abstract p {
  font-size: 1rem;
  line-height: 1.65;
  color: var(--color-ink-light);
}

.paper-relevance {
  border-left: 3px solid var(--color-burgundy);
  padding-left: var(--space-lg);
}

.paper-bibtex {
  font-family: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.78rem;
  line-height: 1.55;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  padding: var(--space-md) var(--space-lg);
  margin: 0 0 var(--space-sm);
  white-space: pre-wrap;
  word-break: break-word;
  color: var(--color-ink);
}

.paper-cite-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  align-items: center;
  font-family: var(--font-ui);
  font-size: 0.875rem;
}

.paper-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5em;
  font-family: var(--font-ui);
  font-size: 0.9375rem;
  font-weight: 600;
  padding: 0.7rem 1.1rem;
  border-radius: 6px;
  border: 1px solid var(--color-burgundy);
  color: var(--color-burgundy);
  background: var(--color-white);
  text-decoration: none;
  cursor: pointer;
  transition:
    background var(--transition-fast),
    color var(--transition-fast),
    border-color var(--transition-fast);
}

.paper-btn:hover {
  background: rgba(139, 38, 53, 0.08);
}

.paper-btn:focus-visible,
.research-thumb:focus-visible,
.research-links a:focus-visible {
  outline: 2px solid var(--color-burgundy);
  outline-offset: 2px;
}

.paper-btn-primary {
  background: var(--color-burgundy);
  color: var(--color-white);
}

.paper-btn-primary:hover {
  background: var(--color-burgundy-dark);
  border-color: var(--color-burgundy-dark);
}

.paper-btn-small {
  font-size: 0.8125rem;
  padding: 0.4rem 0.75rem;
}

.paper-cite-link {
  color: var(--color-burgundy);
  text-decoration: none;
}

.paper-cite-link:hover {
  text-decoration: underline;
}

/* Sidebar */
.paper-side {
  position: sticky;
  top: calc(var(--header-height) + var(--space-lg));
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.paper-side .research-thumb {
  width: 100%;
}

.paper-side-actions {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.paper-side-actions .paper-btn[rel~="external"]::after {
  content: "\2197";
  font-size: 0.85em;
}

.paper-side-block h3 {
  font-family: var(--font-ui);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-ink-muted);
  margin: 0 0 var(--space-sm);
}

.paper-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  list-style: none;
  margin: 0;
  padding: 0;
}

.paper-tags li {
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 0.75rem;
  background: var(--color-paper-darker);
  color: var(--color-ink-light);
  padding: 0.2rem 0.5rem;
  border-radius: 3px;
}

.paper-versions {
  list-style: none;
  margin: 0;
  padding: 0;
  font-family: var(--font-ui);
  font-size: 0.875rem;
  color: var(--color-ink-light);
}

.paper-versions li {
  display: flex;
  gap: var(--space-sm);
  padding: var(--space-xs) 0;
  border-bottom: 1px solid var(--color-border-light);
}

.paper-versions li:last-child {
  border-bottom: none;
}

.paper-versions a {
  color: var(--color-burgundy);
  text-decoration: none;
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 0.8125rem;
}

.paper-versions a:hover {
  text-decoration: underline;
}

.paper-versions .paper-version-note {
  color: var(--color-ink-muted);
}

.paper-notfound {
  max-width: var(--reader-width);
}

.paper-notfound h1 {
  font-family: var(--font-display);
  font-size: 2rem;
  margin: 0 0 var(--space-md);
}

.paper-notfound p {
  font-family: var(--font-body);
  color: var(--color-ink-light);
}

/* Responsive */
@media (max-width: 900px) {
  .paper-layout {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }

  .paper-side {
    position: static;
    padding-top: var(--space-lg);
    border-top: 1px solid var(--color-border);
    display: grid;
    grid-template-columns: 140px 1fr;
    gap: var(--space-lg);
    align-items: start;
  }

  .paper-side .paper-side-block {
    grid-column: 1 / -1;
  }
}

@media (max-width: 600px) {
  .research-main {
    padding: var(--space-xl) var(--space-md) var(--space-2xl);
  }

  .research-card {
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }

  .research-thumb {
    width: 140px;
  }

  .paper-side {
    grid-template-columns: 1fr;
  }

  .paper-side .research-thumb {
    width: 140px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .research-thumb,
  .paper-btn {
    transition: none;
  }

  .research-skeleton .skeleton-block {
    animation: none;
  }
}