/* Academic Paper and Citation Search — Stylesheet
   Prefix: --acd-
   Cluster: education (accent: --tf-accent #2d5a27 in light, #74c66e in dark). */

:root {
  --acd-surface: #ffffff;
  --acd-card: #ffffff;
  --acd-border: #e2e8f0;
  --acd-text: #0f172a;
  --acd-muted: #64748b;
  --acd-code-bg: #f8fafc;
  --acd-radius: 4px;
}

.acd-container {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 20px;
}

.acd-main {
  padding: 16px 0 60px;
}

/* Search Bar */
.acd-search-section {
  margin-bottom: 24px;
}

.acd-sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

.acd-input-wrap {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--acd-surface);
  border: 1.5px solid var(--acd-border);
  border-radius: 6px;
  padding: 6px 10px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.acd-search-icon {
  color: var(--acd-muted);
  flex-shrink: 0;
  margin-left: 4px;
}

.acd-input {
  flex: 1;
  border: none;
  background: transparent;
  font-size: 1rem;
  color: var(--acd-text);
  padding: 8px;
  outline: none;
  font-family: inherit;
}

.acd-btn-search {
  background: var(--tf-accent);
  color: var(--tf-accent-ink, #ffffff);
  border: 1px solid var(--tf-accent);
  padding: 10px 18px;
  border-radius: var(--acd-radius);
  font-size: 0.875rem;
  font-weight: 700;
  cursor: pointer;
  white-space: nowrap;
  transition: background-color 0.15s ease;
}

.acd-btn-search:hover {
  background: var(--tf-accent-hover);
}

@media (max-width: 640px) {
  .acd-input-wrap {
    flex-direction: column;
    align-items: stretch;
  }
}

/* Discipline filters */
.acd-filters-row {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
  margin: 10px 0;
}

.acd-filter-lbl {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--acd-muted);
}

.acd-discipline-btn {
  background: var(--acd-surface);
  border: 1px solid var(--acd-border);
  color: var(--acd-text);
  padding: 4px 10px;
  border-radius: var(--acd-radius);
  font-size: 0.75rem;
  font-weight: 600;
  cursor: pointer;
  transition: border-color 0.15s, color 0.15s, background-color 0.15s;
}

.acd-discipline-btn:hover {
  border-color: var(--tf-accent);
  color: var(--tf-accent);
}

.acd-discipline-btn.active {
  background: var(--tf-accent-wash);
  border-color: var(--tf-accent);
  color: var(--tf-accent);
}

/* Presets */
.acd-presets {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
  margin-bottom: 24px;
}

.acd-preset-lbl {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--acd-muted);
}

.acd-chip {
  background: var(--acd-surface);
  border: 1px solid var(--acd-border);
  color: var(--acd-text);
  padding: 4px 10px;
  border-radius: var(--acd-radius);
  font-size: 0.75rem;
  font-weight: 600;
  cursor: pointer;
  transition: border-color 0.15s, color 0.15s, background-color 0.15s;
}

.acd-chip:hover {
  border-color: var(--tf-accent);
  color: var(--tf-accent);
}

.acd-results-status {
  margin-bottom: 14px;
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--acd-muted);
}

/* Results Grid */
.acd-results-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-bottom: 24px;
}

.acd-paper-card {
  background: var(--acd-surface);
  border: 1.5px solid var(--acd-border);
  border-radius: 6px;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.03);
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.acd-paper-card:hover {
  border-color: var(--tf-accent);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.06);
}

.acd-paper-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
}

.acd-paper-title {
  font-size: 1.125rem;
  font-weight: 800;
  color: var(--acd-text);
  margin: 0;
  line-height: 1.35;
}

.acd-paper-authors {
  font-size: 0.8125rem;
  color: var(--acd-muted);
}

.acd-paper-meta-row {
  display: flex;
  gap: 12px;
  align-items: center;
  font-size: 0.75rem;
  color: var(--acd-muted);
  flex-wrap: wrap;
}

.acd-citation-count {
  font-family: ui-monospace, monospace;
  font-weight: 700;
  color: var(--tf-accent);
  background: var(--tf-accent-wash);
  border: 1px solid var(--tf-accent);
  padding: 2px 8px;
  border-radius: var(--acd-radius);
}

.acd-paper-actions {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid var(--acd-border);
  padding-top: 12px;
  margin-top: 4px;
  flex-wrap: wrap;
  gap: 8px;
}

.acd-btn-cite {
  background: var(--acd-surface);
  border: 1px solid var(--acd-border);
  color: var(--acd-text);
  padding: 6px 12px;
  border-radius: var(--acd-radius);
  font-size: 0.8125rem;
  font-weight: 600;
  cursor: pointer;
  transition: border-color 0.15s, color 0.15s;
}

.acd-btn-cite:hover {
  border-color: var(--tf-accent);
  color: var(--tf-accent);
}

.acd-pdf-link {
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--tf-accent);
  text-decoration: none;
}

.acd-pdf-link:hover {
  text-decoration: underline;
}

/* Citation Modal */
.acd-modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 20px;
}

.acd-modal-content {
  background: var(--acd-surface);
  border: 1.5px solid var(--acd-border);
  border-radius: 6px;
  max-width: 600px;
  width: 100%;
  padding: 24px;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
}

.acd-modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
  border-bottom: 1px solid var(--acd-border);
  padding-bottom: 10px;
}

.acd-modal-title {
  font-size: 1.125rem;
  font-weight: 800;
  color: var(--acd-text);
  margin: 0;
}

.acd-modal-close {
  background: transparent;
  border: none;
  font-size: 1.25rem;
  color: var(--acd-muted);
  cursor: pointer;
}

.acd-citation-formats {
  display: flex;
  gap: 6px;
  margin-bottom: 12px;
}

.acd-cite-tab {
  background: var(--acd-surface);
  border: 1px solid var(--acd-border);
  color: var(--acd-muted);
  padding: 4px 10px;
  border-radius: var(--acd-radius);
  font-size: 0.75rem;
  font-weight: 600;
  cursor: pointer;
}

.acd-cite-tab.active {
  background: var(--tf-accent-wash);
  border-color: var(--tf-accent);
  color: var(--tf-accent);
  font-weight: 700;
}

.acd-citation-text {
  width: 100%;
  box-sizing: border-box;
  background: var(--acd-code-bg);
  border: 1px solid var(--acd-border);
  color: var(--acd-text);
  font-family: ui-monospace, monospace;
  font-size: 0.8125rem;
  padding: 10px;
  border-radius: var(--acd-radius);
  resize: none;
  margin-bottom: 14px;
}

.acd-modal-actions {
  display: flex;
  justify-content: flex-end;
}

.acd-btn-primary {
  background: var(--tf-accent);
  color: var(--tf-accent-ink, #ffffff);
  border: 1px solid var(--tf-accent);
  padding: 8px 16px;
  border-radius: var(--acd-radius);
  font-size: 0.875rem;
  font-weight: 700;
  cursor: pointer;
}

.acd-ad-container {
  margin-block: 2rem;
  min-height: 280px;
  border: 1px dashed var(--acd-border);
  border-radius: var(--acd-radius);
  display: flex;
  align-items: center;
  justify-content: center;
}

.acd-spinner {
  display: inline-block;
  width: 12px;
  height: 12px;
  margin-right: 6px;
  border: 2px solid currentColor;
  border-right-color: transparent;
  border-radius: 50%;
  vertical-align: -2px;
  animation: acd-spin 0.6s linear infinite;
}

.acd-spinner-lg {
  width: 20px;
  height: 20px;
  border-width: 2.5px;
  display: block;
  margin: 0 auto 12px;
}

@keyframes acd-spin {
  to { transform: rotate(360deg); }
}

.acd-loading-state {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--acd-muted);
  font-weight: 700;
}

#acdSearchBtn:disabled {
  opacity: 0.75;
  cursor: wait;
}
/* tf:dark-palette — generated by migrate_chrome.py */
/* Neutrals inherit the shared chrome tokens so all tools share one
   ground; brand hues are kept and lightened, never inverted. */
[data-theme="dark"] {
  --acd-surface: var(--tf-surface);
  --acd-card: var(--tf-surface);
  --acd-border: var(--tf-surface);
  --acd-text: var(--tf-ink);
  --acd-muted: var(--tf-ink-faint);
  --acd-code-bg: var(--tf-surface);
}