/* Library page styles */

.library-wrap {
  max-width: 1000px;
  padding: 24px 18px;
}

.library-header {
  margin-bottom: 32px;
}

.header-left {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.back-link {
  color: var(--muted);
  text-decoration: none;
  font-size: 14px;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: color 0.15s;
}

.back-link:hover {
  color: var(--text);
}

.library-header h1 {
  font-size: 28px;
  margin: 0;
}

.subtitle {
  font-size: 14px;
  color: var(--muted);
  margin: 0;
}

/* Filters */
.filters-section {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 20px;
  margin-bottom: 24px;
}

.filters-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-bottom: 16px;
}

.filter-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.filter-group label {
  font-size: 12px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.filter-input {
  padding: 8px 12px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-size: 14px;
  font-family: inherit;
}

.filter-input:focus {
  outline: none;
  border-color: rgba(80, 200, 120, 0.5);
}

.filter-input.small {
  width: 80px;
}

.year-inputs {
  display: flex;
  align-items: center;
  gap: 8px;
}

.filter-actions {
  display: flex;
  gap: 10px;
}

/* Results */
.library-main {
  margin-bottom: 48px;
}

.results-header {
  margin-bottom: 16px;
}

.results-header h2 {
  font-size: 18px;
  margin: 0;
  color: var(--muted);
}

/* Papers grid */
.papers-grid {
  display: grid;
  gap: 16px;
}

.loading {
  text-align: center;
  color: var(--muted);
  padding: 48px;
  font-size: 14px;
}

.paper-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 18px;
  transition: all 0.15s;
}

.paper-card:hover {
  border-color: rgba(255, 255, 255, 0.12);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.paper-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 12px;
}

.paper-title {
  font-size: 16px;
  font-weight: 600;
  line-height: 1.3;
  flex: 1;
}

.paper-strength {
  padding: 4px 10px;
  border-radius: 6px;
  font-size: 11px;
  text-transform: uppercase;
  font-weight: 700;
  letter-spacing: 0.05em;
  white-space: nowrap;
}

.paper-strength.like {
  background: rgba(80, 200, 120, 0.15);
  color: rgba(80, 200, 120, 1);
  border: 1px solid rgba(80, 200, 120, 0.3);
}

.paper-strength.super {
  background: rgba(255, 210, 80, 0.15);
  color: rgba(255, 210, 80, 1);
  border: 1px solid rgba(255, 210, 80, 0.3);
}

.paper-authors {
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 10px;
  line-height: 1.4;
}

.paper-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 12px;
  color: var(--muted);
  margin-bottom: 12px;
}

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

.paper-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 12px;
}

.tag {
  padding: 4px 8px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 11px;
  color: var(--muted);
}

.tag.org {
  background: rgba(100, 150, 255, 0.1);
  border-color: rgba(100, 150, 255, 0.3);
  color: rgba(150, 180, 255, 1);
}

.tag.theme {
  background: rgba(255, 150, 100, 0.1);
  border-color: rgba(255, 150, 100, 0.3);
  color: rgba(255, 180, 150, 1);
}

.paper-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 10px;
  border-top: 1px solid var(--border);
}

.paper-date {
  font-size: 11px;
  color: var(--muted);
}

.paper-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 6px 12px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  text-decoration: none;
  font-size: 12px;
  transition: all 0.15s;
}

.paper-link:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.15);
}

/* Empty state */
.empty-state {
  text-align: center;
  padding: 64px 24px;
  color: var(--muted);
}

.empty-state h3 {
  font-size: 20px;
  margin: 0 0 12px 0;
  color: var(--text);
}

.empty-state p {
  font-size: 14px;
  margin: 0 0 24px 0;
}

.empty-state .btn {
  display: inline-block;
  padding: 12px 24px;
}