:root {
  --bg: #0f1115;
  --panel: #171a21;
  --border: #2a2e37;
  --text: #e6e8eb;
  --muted: #8b8f98;
  --accent: #6ea8fe;
  --error: #ff6b6b;
  --success: #5ec48b;

  /* Categorical chart palette (dark values) — dataviz skill, palette.md */
  --series-0: #3987e5; /* blue */
  --series-1: #d95926; /* orange */
  --series-2: #199e70; /* aqua */
  --series-3: #c98500; /* yellow */
  --series-4: #d55181; /* magenta */
  --series-5: #008300; /* green */
  --series-other: #898781;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f7f7f8;
    --panel: #ffffff;
    --border: #e2e2e6;
    --text: #1b1d22;
    --muted: #6b6f78;
    --accent: #2e6de0;

    --series-0: #2a78d6;
    --series-1: #eb6834;
    --series-2: #1baf7a;
    --series-3: #eda100;
    --series-4: #e87ba4;
    --series-5: #008300;
    --series-other: #898781;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.site-header {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  padding: 0.75rem 1.5rem;
  border-bottom: 1px solid var(--border);
  background: var(--panel);
  flex-wrap: wrap;
}

.brand { font-weight: 700; font-size: 1.1rem; color: var(--text); }

.search-form { display: flex; gap: 0.5rem; flex: 1; min-width: 200px; max-width: 480px; }
.search-form input {
  flex: 1;
  padding: 0.55rem 0.8rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  font-size: 0.95rem;
}
.search-form button {
  padding: 0.5rem 1rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text);
  cursor: pointer;
}

/* Summary box + nav share the far-right end of the header, so the box lives
   in the page's top-right corner without ever overlapping page content. */
.header-right { display: flex; align-items: center; gap: 1rem; margin-left: auto; flex-wrap: wrap; }
nav { display: flex; gap: 1rem; }

.summary-box {
  border-collapse: collapse;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 0.75rem;
  padding: 0.3rem 0;
}
.summary-box td { padding: 0.1rem 0.5rem; white-space: nowrap; }
.summary-box td:first-child { color: var(--muted); }
.summary-box td:last-child { text-align: right; font-weight: 600; }

.container { max-width: 1100px; margin: 0 auto; padding: 1.5rem; }
.container.narrow { max-width: 420px; }

.content { min-width: 0; }

/* Continuous auto-scrolling ticker with the project description, homepage only */
.ticker {
  overflow: hidden;
  white-space: nowrap;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--panel);
  padding: 0.6rem 0;
  margin-bottom: 1.5rem;
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 5%, #000 95%, transparent);
          mask-image: linear-gradient(90deg, transparent, #000 5%, #000 95%, transparent);
}
.ticker-track {
  display: inline-flex;
  animation: ticker-scroll 32s linear infinite;
}
.ticker-track span {
  padding-right: 4rem;
  color: var(--muted);
  font-size: 0.85rem;
}
@keyframes ticker-scroll {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}
@media (prefers-reduced-motion: reduce) {
  .ticker-track { animation: none; }
  .ticker { overflow-x: auto; }
}

/* Centered, wrapping subject bar (replaces the old left sidebar) */
.subject-bar {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 0.6rem;
  padding-bottom: 1.5rem;
  margin-bottom: 1.5rem;
  border-bottom: 1px solid var(--border);
}
.all-link {
  font-weight: 700;
  color: var(--text);
  padding: 0.2rem 0;
}
.all-link.active { color: var(--accent); }

.subject-group {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.4rem;
  max-width: 900px;
}
.subject-group-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--muted);
}
.subject-pills {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.4rem;
}
.subject-pills .tag-pill.active {
  border-color: var(--accent);
  color: var(--accent);
  font-weight: 600;
}
.tag-pill .count { color: var(--muted); font-size: 0.75rem; }

.tags-overflow-link {
  display: block;
  margin-top: 0.5rem;
  font-size: 0.8rem;
  color: var(--muted);
}
.tags-overflow-link:hover { color: var(--accent); }

.tags-directory { justify-content: flex-start; max-width: none; }

.project-description {
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.6;
  max-width: 70ch;
  margin: 0 0 1.5rem;
}

.filter-summary { color: var(--muted); margin-bottom: 1rem; text-align: center; }
.result-count { color: var(--muted); font-size: 0.85rem; margin-bottom: 1rem; text-align: center; }

.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0.4rem;
  margin-top: 2rem;
  flex-wrap: wrap;
  font-size: 0.9rem;
}
.pagination a, .pagination span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 2rem;
  height: 2rem;
  padding: 0 0.5rem;
  border-radius: 6px;
}
.pagination a { border: 1px solid var(--border); color: var(--text); }
.pagination a:hover { border-color: var(--accent); text-decoration: none; }
.pagination-current { background: var(--accent); color: #0f1115; font-weight: 600; }
.pagination-disabled { color: var(--muted); }
.pagination-ellipsis { color: var(--muted); }

.item-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1.25rem;
}

.item-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.item-thumb, .item-detail-thumb {
  width: 100%;
  max-height: 160px;
  object-fit: cover;
  border-radius: 6px;
}

.item-card h3 { margin: 0; font-size: 1.05rem; }
.item-meta { color: var(--muted); font-size: 0.85rem; display: flex; gap: 0.6rem; margin: 0; }
.item-authors { font-size: 0.9rem; color: var(--muted); margin: 0; }
.item-abstract { font-size: 0.9rem; margin: 0; }

.item-tags { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-top: 0.25rem; }
.tag-pill {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.15rem 0.6rem;
  font-size: 0.8rem;
  color: var(--text);
}

.empty-state { color: var(--muted); }

.item-detail h1 { margin-bottom: 0.25rem; }
.item-abstract-full, .item-notes { max-width: 70ch; }
.external-link { font-weight: 600; }
.item-actions { margin-top: 2rem; color: var(--muted); }

.inline-form { display: inline; }
.link-button {
  background: none;
  border: none;
  padding: 0;
  color: var(--accent);
  cursor: pointer;
  font: inherit;
  text-decoration: none;
}
.link-button:hover { text-decoration: underline; }

.item-form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  max-width: 640px;
}
.item-form label { display: flex; flex-direction: column; gap: 0.3rem; font-size: 0.9rem; color: var(--muted); }
.item-form label.checkbox-label { flex-direction: row; align-items: center; gap: 0.5rem; }
.item-form label.checkbox-label input[type="checkbox"] { width: auto; }
.item-form input, .item-form textarea {
  padding: 0.5rem 0.6rem;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text);
  font: inherit;
}
.item-form button {
  align-self: flex-start;
  padding: 0.5rem 1.2rem;
  border-radius: 6px;
  border: none;
  background: var(--accent);
  color: #0f1115;
  font-weight: 600;
  cursor: pointer;
}

.fetch-row { display: flex; gap: 0.5rem; }
.fetch-row input { flex: 1; }
.fetch-row button {
  padding: 0.5rem 0.8rem;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text);
  cursor: pointer;
}

.muted { color: var(--muted); font-size: 0.85rem; }
.error { color: var(--error); }
.success { color: var(--success); }

.credits-list { padding-left: 1.5rem; line-height: 1.9; }
.credits-list li { margin-bottom: 0.5rem; }

.callout {
  background: var(--panel);
  border: 1px solid var(--accent);
  border-left: 4px solid var(--accent);
  border-radius: 8px;
  padding: 1rem 1.25rem;
  margin: 1rem 0;
  line-height: 1.6;
}

.site-footer {
  max-width: 1100px;
  margin: 2rem auto 0;
  padding: 1rem 1.5rem 2rem;
  color: var(--muted);
  font-size: 0.8rem;
  text-align: center;
  border-top: 1px solid var(--border);
}

.chart-scroll { overflow-x: auto; padding-bottom: 0.25rem; }
.activity-chart { display: block; height: 230px; }
.chart-seg { transition: opacity 0.1s; }
.chart-seg:hover { opacity: 0.8; }
.chart-grid { stroke: var(--border); stroke-width: 1; }
.chart-axis-label { font-size: 9px; fill: var(--muted); font-family: inherit; }

.chart-legend { display: flex; flex-wrap: wrap; gap: 0.75rem; margin: 0.75rem 0; font-size: 0.85rem; }
.chart-legend-item { display: flex; align-items: center; gap: 0.4rem; color: var(--text); }
.chart-swatch { width: 10px; height: 10px; border-radius: 2px; display: inline-block; }

.chart-table-toggle summary { cursor: pointer; color: var(--muted); font-size: 0.85rem; margin-bottom: 0.5rem; }

.seed-table { width: 100%; border-collapse: collapse; margin-top: 1rem; font-size: 0.9rem; }
.seed-table th, .seed-table td {
  text-align: left;
  padding: 0.5rem 0.6rem;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}
.seed-table td a { word-break: break-all; }
.seed-table pre { white-space: pre-wrap; font-size: 0.8rem; color: var(--muted); }
#run-now-btn {
  padding: 0.5rem 1rem;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--accent);
  color: #0f1115;
  font-weight: 600;
  cursor: pointer;
}