.pr-wrap {
  max-width: 860px;
}

.pr-intro h1 {
  margin: 0 0 8px;
  font-size: 28px;
  letter-spacing: -0.01em;
}

.pr-intro .tagline {
  margin: 0;
  color: var(--text-muted);
  font-size: 15px;
}

.pr-caption {
  color: var(--text-muted);
  font-size: 13px;
  margin: 10px 0 0;
}

/* ---------- Heatmap ---------- */
.heatmap {
  display: grid;
  grid-auto-flow: column;
  grid-template-rows: repeat(7, 12px);
  gap: 3px;
  overflow-x: auto;
  padding-bottom: 4px;
}
.heatmap .cell {
  width: 12px;
  height: 12px;
  border-radius: 2px;
  background: var(--pill-bg);
  border: 1px solid var(--border);
}
.heatmap .cell[data-level="1"] { background: color-mix(in srgb, var(--accent) 25%, var(--pill-bg)); border-color: transparent; }
.heatmap .cell[data-level="2"] { background: color-mix(in srgb, var(--accent) 50%, var(--pill-bg)); border-color: transparent; }
.heatmap .cell[data-level="3"] { background: color-mix(in srgb, var(--accent) 75%, var(--pill-bg)); border-color: transparent; }
.heatmap .cell[data-level="4"] { background: var(--accent); border-color: transparent; }
.heatmap .cell.future { visibility: hidden; }

/* ---------- Stats ---------- */
.pr-stats {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}
.pr-stat {
  background: var(--pill-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 16px;
  min-width: 92px;
}
.pr-stat .n {
  font-size: 20px;
  font-weight: 700;
  line-height: 1.2;
}
.pr-stat .l {
  font-size: 12px;
  color: var(--text-muted);
}

/* ---------- Filters ---------- */
.pr-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}
.pr-search,
.pr-select {
  font: inherit;
  font-size: 14px;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 7px;
  padding: 7px 10px;
}
.pr-search {
  flex: 1 1 220px;
  min-width: 160px;
}
.pr-topics {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  width: 100%;
}
.topic-chip {
  font-size: 13px;
  color: var(--text-muted);
  background: var(--pill-bg);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 4px 12px;
  cursor: pointer;
}
.topic-chip.active {
  color: #fff;
  background: var(--accent);
  border-color: var(--accent);
}

/* ---------- Paper list ---------- */
.pr-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.pr-card {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px 18px;
}
.pr-card-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 14px;
}
.pr-actions {
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 6px;
}
.pr-card-title {
  font-weight: 600;
  font-size: 16px;
  line-height: 1.4;
}
.pr-card-meta {
  margin-top: 5px;
  font-size: 13px;
  color: var(--text-muted);
  display: flex;
  flex-wrap: wrap;
  gap: 6px 8px;
  align-items: center;
}
.pr-tag {
  display: inline-block;
  background: var(--pill-bg);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 1px 9px;
  font-size: 12px;
  color: var(--text-muted);
}
.pr-brief {
  margin: 12px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text);
  overflow: hidden;
  max-height: 4.9em;
}
.pr-brief.expanded {
  max-height: none;
}
.pr-brief-toggle {
  margin-top: 6px;
  font-size: 13px;
  background: none;
  border: none;
  padding: 0;
  color: var(--accent);
  cursor: pointer;
  font-family: inherit;
}
.pr-model-tag {
  margin-top: 10px;
  font-size: 12px;
  color: var(--text-muted);
}

/* Read status (brief + deep read) */
.pr-status {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 6px;
}
.pr-read-toggle {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--text-muted);
  background: var(--pill-bg);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 5px 12px 5px 8px;
  cursor: pointer;
  white-space: nowrap;
}
.pr-read-toggle .dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  border: 1.5px solid var(--text-muted);
  flex-shrink: 0;
}
.pr-read-toggle .ic {
  font-size: 11px;
  line-height: 1;
  filter: grayscale(1) opacity(0.6);
  flex-shrink: 0;
}
.pr-read-toggle.is-read {
  color: var(--accent);
  border-color: var(--accent);
}
.pr-read-toggle.is-read .dot {
  background: var(--accent);
  border-color: var(--accent);
}
.pr-read-toggle.deep.is-read {
  color: #fff;
  background: var(--accent);
  border-color: var(--accent);
}
.pr-read-toggle.deep.is-read .ic {
  filter: none;
}
.pr-read-toggle.readonly {
  cursor: default;
}

/* Read full text link */
.pr-readfull {
  font-size: 12px;
  color: var(--accent);
  text-decoration: none;
  white-space: nowrap;
  margin-top: 2px;
}
.pr-readfull:hover { text-decoration: underline; }

/* Interest rating */
.pr-interest {
  display: flex;
  gap: 1px;
}
.pr-star {
  font: inherit;
  font-size: 15px;
  line-height: 1;
  background: none;
  border: none;
  padding: 2px;
  color: var(--border);
  cursor: pointer;
}
.pr-star.filled {
  color: var(--accent);
}
.pr-interest.readonly .pr-star {
  cursor: default;
}
.pr-interest:not(.readonly) .pr-star:hover {
  color: var(--accent-hover);
}

/* ---------- Pagination ---------- */
.pr-pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-top: 22px;
}
.pr-page-btn {
  font: inherit;
  font-size: 13px;
  color: var(--text);
  background: var(--pill-bg);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 6px 16px;
  cursor: pointer;
}
.pr-page-btn:disabled {
  opacity: 0.4;
  cursor: default;
}
.pr-page-btn:not(:disabled):hover {
  border-color: var(--accent);
}
.pr-page-info {
  font-size: 13px;
  color: var(--text-muted);
  font-variant-numeric: tabular-nums;
}

@media (max-width: 560px) {
  .pr-card-head {
    flex-direction: column;
  }
}