/* Balance On Hand Research — research.css
 * Extends the main design system for the BOHR research portal.
 * Uses existing design tokens from styles.css.
 */

/* ---------- Research hero ---------- */
.research-hero {
  padding: 72px 0 56px;
  background:
    radial-gradient(circle at 15% 30%, rgba(30, 111, 184, 0.06), transparent 50%),
    radial-gradient(circle at 85% 10%, rgba(16, 185, 129, 0.05), transparent 40%),
    var(--color-bg);
  border-bottom: 1px solid var(--color-border);
}

.research-hero .section-eyebrow {
  font-size: 0.82rem;
  letter-spacing: 0.1em;
}

.research-hero h1 {
  font-size: 2.2rem;
  margin-bottom: 0.3em;
}

.research-hero .lead {
  max-width: 64ch;
  font-size: 1.1rem;
}

.research-mission {
  margin-top: 1.2em;
  font-size: 0.95rem;
  color: var(--color-text-muted);
  max-width: 64ch;
}

/* ---------- Breadcrumbs ---------- */
.breadcrumbs {
  padding: 12px 0;
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.breadcrumbs a {
  color: var(--color-text-muted);
}

.breadcrumbs a:hover {
  color: var(--color-primary);
}

.breadcrumbs span {
  margin: 0 6px;
  color: var(--color-border-strong);
}

/* ---------- Publication cards ---------- */
.pub-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-sm);
  transition: box-shadow 150ms ease, border-color 150ms ease;
}

.pub-card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--color-border-strong);
}

.pub-card-id {
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.pub-card h3 {
  font-size: 1.2rem;
  margin-bottom: 0.2em;
}

.pub-card-subtitle {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  margin-bottom: 12px;
}

.pub-card-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.82rem;
  color: var(--color-text-muted);
  margin-bottom: 14px;
}

.pub-card-meta span {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.pub-card-abstract {
  font-size: 0.92rem;
  color: var(--color-text-soft);
  margin-bottom: 18px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.pub-card-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.pub-card-actions a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 600;
  text-decoration: none;
  transition: background 120ms ease, color 120ms ease, border-color 120ms ease;
}

.pub-card-actions .btn-read {
  background: var(--color-primary);
  color: #fff;
}

.pub-card-actions .btn-read:hover {
  background: var(--color-primary-dark);
  color: #fff;
  text-decoration: none;
}

.pub-card-actions .btn-download {
  background: #fff;
  color: var(--color-primary-dark);
  border: 1px solid var(--color-border-strong);
}

.pub-card-actions .btn-download:hover {
  background: var(--color-bg-muted);
  border-color: var(--color-primary);
  text-decoration: none;
}

/* ---------- Status badges ---------- */
.status-badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.status-badge.is-published {
  background: rgba(16, 185, 129, 0.12);
  color: var(--color-accent-dark);
}

.status-badge.is-planned {
  background: var(--color-bg-muted);
  color: var(--color-text-muted);
}

.status-badge.is-progress {
  background: rgba(30, 111, 184, 0.1);
  color: var(--color-primary-dark);
}

/* ---------- Category badges ---------- */
.category-badge {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 600;
  background: var(--color-bg-muted);
  color: var(--color-primary-dark);
}

/* ---------- Category grid ---------- */
.category-grid {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(2, 1fr);
}

.category-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px;
  text-align: center;
  transition: box-shadow 150ms ease, border-color 150ms ease;
}

.category-card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--color-border-strong);
}

.category-card h3 {
  font-size: 0.95rem;
  margin: 0;
  color: var(--color-text);
}

.category-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--color-bg-muted);
  color: var(--color-primary-dark);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  font-weight: 700;
  margin: 0 auto 10px;
}

/* ---------- Principles list ---------- */
.principles-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 14px;
}

.principles-list li {
  display: grid;
  grid-template-columns: 36px 1fr;
  gap: 14px;
  align-items: start;
  padding: 16px 20px;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.principle-number {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.85rem;
  flex-shrink: 0;
}

.principles-list strong {
  display: block;
  margin-bottom: 2px;
}

/* ---------- Roadmap ---------- */
.roadmap-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.roadmap-item {
  display: grid;
  grid-template-columns: 100px 1fr;
  gap: 16px;
  padding: 18px 0;
  border-bottom: 1px solid var(--color-border);
  align-items: center;
}

.roadmap-item:last-child {
  border-bottom: none;
}

.roadmap-id {
  font-weight: 700;
  font-size: 0.88rem;
  color: var(--color-text);
}

.roadmap-title {
  font-size: 0.95rem;
  color: var(--color-text-soft);
}

/* ---------- Paper page ---------- */
.paper-header {
  padding: 48px 0 32px;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
}

.paper-pub-id {
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.paper-header h1 {
  font-size: 2rem;
  margin-bottom: 0.15em;
}

.paper-header-subtitle {
  font-size: 1.15rem;
  color: var(--color-text-soft);
  margin-bottom: 20px;
}

.paper-meta-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 12px;
  margin-top: 20px;
}

.paper-meta-item {
  font-size: 0.85rem;
}

.paper-meta-item dt {
  font-weight: 600;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-size: 0.72rem;
  margin-bottom: 2px;
}

.paper-meta-item dd {
  margin: 0;
  color: var(--color-text);
}

/* ---------- Paper content (rendered markdown) ---------- */
.paper-body {
  padding: 48px 0;
}

.paper-content {
  max-width: 780px;
}

.paper-content h1 {
  font-size: 1.8rem;
  margin-top: 2.4em;
  padding-top: 1.2em;
  border-top: 1px solid var(--color-border);
}

.paper-content h1:first-child {
  margin-top: 0;
  padding-top: 0;
  border-top: none;
}

.paper-content h2 {
  font-size: 1.5rem;
  margin-top: 2em;
  padding-top: 0.8em;
}

.paper-content h3 {
  font-size: 1.2rem;
  margin-top: 1.6em;
}

.paper-content p {
  line-height: 1.75;
  margin-bottom: 1.1em;
}

.paper-content ul,
.paper-content ol {
  line-height: 1.7;
  padding-left: 1.5em;
}

.paper-content li {
  margin-bottom: 0.5em;
}

.paper-content blockquote {
  margin: 1.5em 0;
  padding: 16px 20px;
  background: var(--color-bg-soft);
  border-left: 4px solid var(--color-primary);
  border-radius: var(--radius-sm);
  color: var(--color-text);
}

.paper-content blockquote p {
  color: var(--color-text);
  margin-bottom: 0.5em;
}

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

.paper-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5em 0;
  font-size: 0.9rem;
}

.paper-content thead th {
  background: var(--color-bg-soft);
  padding: 10px 14px;
  text-align: left;
  font-weight: 600;
  border-bottom: 2px solid var(--color-border-strong);
}

.paper-content tbody td {
  padding: 10px 14px;
  border-bottom: 1px solid var(--color-border);
  vertical-align: top;
}

.paper-content tbody tr:last-child td {
  border-bottom: none;
}

.paper-content pre {
  background: #1e293b;
  color: #e2e8f0;
  padding: 18px 20px;
  border-radius: var(--radius-md);
  overflow-x: auto;
  font-size: 0.85rem;
  line-height: 1.6;
  margin: 1.5em 0;
}

.paper-content code {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 0.88em;
}

.paper-content p code,
.paper-content li code {
  background: var(--color-bg-muted);
  padding: 2px 6px;
  border-radius: 4px;
  color: var(--color-primary-dark);
}

.paper-content hr {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: 2em 0;
}

.paper-content strong {
  color: var(--color-text);
}

.paper-content em {
  font-style: italic;
}

/* ---------- Paper sidebar / actions ---------- */
.paper-actions-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  padding: 20px 0;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 32px;
}

.paper-actions-bar a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 20px;
  border-radius: 999px;
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
  transition: background 120ms ease, border-color 120ms ease;
}

.paper-actions-bar .btn-primary {
  background: var(--color-primary);
  color: #fff;
}

.paper-actions-bar .btn-primary:hover {
  background: var(--color-primary-dark);
  color: #fff;
  text-decoration: none;
}

.paper-actions-bar .btn-secondary {
  background: #fff;
  color: var(--color-primary-dark);
  border: 1px solid var(--color-border-strong);
}

.paper-actions-bar .btn-secondary:hover {
  background: var(--color-bg-muted);
  border-color: var(--color-primary);
  text-decoration: none;
}

/* ---------- Integrity / hash display ---------- */
.integrity-section {
  margin-top: 48px;
  padding-top: 32px;
  border-top: 1px solid var(--color-border);
}

.hash-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
  margin-top: 16px;
}

.hash-table th {
  text-align: left;
  padding: 8px 12px;
  font-weight: 600;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  font-size: 0.72rem;
  background: var(--color-bg-soft);
  border-bottom: 1px solid var(--color-border);
}

.hash-table td {
  padding: 8px 12px;
  border-bottom: 1px solid var(--color-border);
  vertical-align: middle;
  word-break: break-all;
}

.hash-table .hash-value {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 0.8rem;
  color: var(--color-text-soft);
}

.copy-hash-btn {
  appearance: none;
  background: var(--color-bg-muted);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 4px 10px;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-text-muted);
  cursor: pointer;
  transition: background 120ms ease, color 120ms ease;
}

.copy-hash-btn:hover {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}

/* ---------- Table of contents ---------- */
.paper-toc {
  background: var(--color-bg-soft);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  margin-bottom: 32px;
}

.paper-toc h2 {
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin: 0 0 12px;
  color: var(--color-text);
}

.paper-toc ol {
  margin: 0;
  padding-left: 1.2em;
  color: var(--color-text-soft);
}

.paper-toc li {
  margin-bottom: 6px;
  font-size: 0.88rem;
}

.paper-toc a {
  color: var(--color-text-soft);
}

.paper-toc a:hover {
  color: var(--color-primary);
}

/* ---------- Version history on paper page ---------- */
.version-history {
  margin-top: 48px;
  padding-top: 32px;
  border-top: 1px solid var(--color-border);
}

.version-history table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
}

.version-history th {
  text-align: left;
  padding: 8px 12px;
  font-weight: 600;
  background: var(--color-bg-soft);
  border-bottom: 1px solid var(--color-border);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-text-muted);
}

.version-history td {
  padding: 8px 12px;
  border-bottom: 1px solid var(--color-border);
}

/* ---------- Publication footer ---------- */
.pub-footer {
  margin-top: 48px;
  padding: 28px;
  background: var(--color-bg-soft);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 0.85rem;
  color: var(--color-text-soft);
  line-height: 1.8;
}

.pub-footer strong {
  color: var(--color-text);
  display: block;
  margin-bottom: 8px;
  font-size: 0.95rem;
}

.pub-footer-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px 24px;
}

.pub-footer-grid dt {
  font-weight: 600;
  color: var(--color-text-muted);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.pub-footer-grid dd {
  margin: 0 0 8px;
}

/* ---------- Verify page ---------- */
.coming-soon-box {
  text-align: center;
  padding: 64px 32px;
  background: var(--color-bg-soft);
  border: 2px dashed var(--color-border-strong);
  border-radius: var(--radius-lg);
  margin: 32px 0;
}

.coming-soon-box h2 {
  color: var(--color-text-muted);
  margin-bottom: 0.5em;
}

.coming-soon-box p {
  color: var(--color-text-muted);
  max-width: 48ch;
  margin: 0 auto;
}

/* ---------- Related papers ---------- */
.related-papers {
  margin-top: 48px;
  padding-top: 32px;
  border-top: 1px solid var(--color-border);
}

.related-papers-grid {
  display: grid;
  gap: 16px;
  margin-top: 16px;
}

.related-paper-card {
  display: flex;
  gap: 14px;
  align-items: center;
  padding: 14px 18px;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  text-decoration: none;
  transition: box-shadow 150ms ease, border-color 150ms ease;
}

.related-paper-card:hover {
  box-shadow: var(--shadow-sm);
  border-color: var(--color-border-strong);
  text-decoration: none;
}

.related-paper-card .pub-card-id {
  margin-bottom: 0;
  flex-shrink: 0;
}

.related-paper-card .related-title {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--color-text);
}

.related-paper-card .related-status {
  font-size: 0.78rem;
  color: var(--color-text-muted);
}

/* ---------- Research page sections ---------- */
.research-section {
  padding: 48px 0;
}

.research-section-alt {
  padding: 48px 0;
  background: var(--color-bg-soft);
}

.research-section h2 {
  margin-bottom: 0.8em;
}

/* ---------- Paper loading state ---------- */
.paper-loading {
  text-align: center;
  padding: 64px 0;
  color: var(--color-text-muted);
}

/* ---------- Responsive adjustments ---------- */
@media (min-width: 600px) {
  .category-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .related-papers-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 768px) {
  .research-hero h1 {
    font-size: 2.6rem;
  }

  .paper-header h1 {
    font-size: 2.4rem;
  }

  .category-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

@media (min-width: 1024px) {
  .research-hero h1 {
    font-size: 2.8rem;
  }
}