:root {
  --bg: #ffffff;
  --fg: #1a202c;
  --muted: #6b7280;
  --accent: #2f855a;
  --accent2: #2b6cb0;
  --border: #e5e7eb;
  --card: #f9fafb;
  --warn-bg: #fffbeb;
  --warn-border: #f59e0b;
  --max: 1040px;
}

* { box-sizing: border-box; }

/* Screen-reader-only text (e.g. the home page's h1, kept out of the visual design). */
.visually-hidden {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0;
}
/* Keyboard skip-link: hidden until focused. */
.skip-link {
  position: absolute; left: 0.5rem; top: -3rem; z-index: 100;
  background: var(--accent); color: #fff; padding: 0.5rem 0.9rem; border-radius: 0 0 6px 6px;
  transition: top 0.15s ease;
}
.skip-link:focus { top: 0; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--fg);
  background: var(--bg);
  line-height: 1.6;
}

.container { max-width: var(--max); margin: 0 auto; padding: 0 1.25rem; }

a { color: var(--accent2); text-decoration: none; }
a:hover { text-decoration: underline; }

code { background: var(--card); padding: 0.1em 0.35em; border-radius: 4px; font-size: 0.9em; }

/* Header */
.site-header { border-bottom: 1px solid var(--border); background: var(--bg); }
.header-inner { display: flex; align-items: center; justify-content: space-between; padding: 0.9rem 1.25rem; flex-wrap: wrap; gap: 0.5rem; }
.brand { display: flex; flex-direction: column; line-height: 1.25; color: var(--fg); }
.brand-name { font-weight: 700; font-size: 1.15rem; }
.brand-tagline { font-weight: 400; font-size: 0.78rem; color: var(--muted); }
.nav a { margin-left: 1rem; color: var(--fg); font-size: 0.95rem; }
.nav a:first-child { margin-left: 0; }

.updated-bar { background: var(--card); border-bottom: 1px solid var(--border); font-size: 0.88rem; color: var(--muted); }
.updated-bar .container { padding-top: 0.5rem; padding-bottom: 0.5rem; }

main.container { padding-top: 2rem; padding-bottom: 3rem; }

/* About-page tagline */
.tagline { color: var(--muted); font-size: 1.1rem; margin-top: 0; }

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

/* Mermaid loop */
.loop { margin: 2rem 0; }
.mermaid { background: var(--card); border: 1px solid var(--border); border-radius: 10px; padding: 1rem; overflow-x: auto; text-align: center; }

/* Stats */
.stats { display: flex; flex-wrap: wrap; gap: 1rem; margin: 2rem 0; }
.stat { flex: 1 1 140px; background: var(--card); border: 1px solid var(--border); border-radius: 10px; padding: 1rem; text-align: center; }
.stat .num { display: block; font-size: 1.6rem; font-weight: 700; color: var(--accent); }
.stat .lbl { color: var(--muted); font-size: 0.85rem; }

/* Plots — large, interactive Plotly figures, one per row */
.plot-grid { display: grid; grid-template-columns: 1fr; gap: 1.75rem; }
.plot-card { margin: 0; background: var(--card); border: 1px solid var(--border); border-radius: 10px; padding: 1rem 1.25rem 1.25rem; }
.plot-card .plot-figure { width: 100%; }
.plot-card .plot-figure .plotly-graph-div { width: 100% !important; }
.plot-card img { width: 100%; height: auto; border-radius: 6px; }
.plot-card figcaption { color: var(--muted); font-size: 0.9rem; margin-top: 0.5rem; }
@media (min-width: 900px) {
  /* Two charts per row on large screens; full-width is still readable. */
  .plot-grid { grid-template-columns: repeat(2, 1fr); }
  /* Trends charts are multi-series time series + long-label bars — give them the
     full width so legends don't wrap and labels/axes aren't cramped. */
  .plot-grid.trend-wide { grid-template-columns: 1fr; }
}

/* Disclaimer */
.disclaimer { background: var(--warn-bg); border: 1px solid var(--warn-border); border-left-width: 5px; border-radius: 8px; padding: 0.85rem 1rem; margin: 1.25rem 0; font-size: 0.95rem; }

/* Clusters */
.cluster-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 1rem; }
.cluster { background: var(--card); border: 1px solid var(--border); border-radius: 10px; padding: 1rem; }
.cluster h3 { margin-top: 0; }
.cluster ul { margin: 0.5rem 0 0; padding-left: 1.1rem; font-size: 0.9rem; }
.keyphrases { columns: 2; }

/* Knowledge base entries */
.entries { list-style: none; padding: 0; }
.entry { border-bottom: 1px solid var(--border); padding: 0.9rem 0; }
.entry-title { font-weight: 600; }
.entry-meta { color: var(--muted); font-size: 0.9rem; }
.entry-links a { margin-right: 0.6rem; font-size: 0.85rem; text-transform: capitalize; }
.entry-abstract { margin-top: 0.4rem; }
.entry-abstract summary { cursor: pointer; color: var(--accent2); font-size: 0.9rem; }

/* Ideas */
.idea { background: var(--card); border: 1px solid var(--border); border-radius: 10px; padding: 1.25rem; margin: 1.25rem 0; }
.idea h2 { margin-top: 0; }
.idea h3 { margin-bottom: 0.2rem; font-size: 1.02rem; color: var(--accent); }
/* Experiments / risks arrive as multi-line text; preserve the line breaks. */
.idea p { white-space: pre-line; }

/* Best ideas + realized star */
.best-ideas { background: #f0fff4; border: 1px solid #c6f6d5; border-radius: 10px; padding: 0.75rem 1.25rem 1rem; margin: 1.25rem 0; }
.best-ideas ol { margin: 0.5rem 0 0; padding-left: 1.4rem; }
.best-ideas li { margin: 0.3rem 0; }
.best-score { display: inline-block; min-width: 1.6rem; margin-left: 0.5rem; padding: 0 0.4rem; border-radius: 999px; background: var(--accent); color: #fff; font-size: 0.8rem; text-align: center; }
.star { color: #d69e2e; font-weight: 700; }
/* Model-of-Interestingness score pill on each idea */
.moi-badge { display: inline-block; margin-left: 0.4rem; padding: 0.05rem 0.5rem; border-radius: 999px;
  background: #ebf8ff; border: 1px solid #bee3f8; color: var(--accent2); font-size: 0.72rem;
  font-weight: 700; vertical-align: middle; white-space: nowrap; }
.realized-note { background: #fffaf0; border: 1px solid #f6e05e; border-radius: 8px; padding: 0.5rem 0.75rem; font-size: 0.92rem; }

/* Voting */
.idea-vote { display: flex; align-items: center; gap: 0.6rem; margin: 1rem 0 0.5rem; }
.vote-btn { cursor: pointer; border: 1px solid var(--border); background: #fff; border-radius: 8px; padding: 0.35rem 0.7rem; font-size: 0.95rem; }
.vote-btn:hover { border-color: var(--accent); }
.vote-btn.up.active { background: #f0fff4; border-color: var(--accent); }
.vote-btn.down.active { background: #fff5f5; border-color: #e53e3e; }
.score-badge { color: var(--muted); font-size: 0.9rem; }

/* GitHub-Issues voting (static site) */
.idea-vote-gh { display: flex; align-items: center; flex-wrap: wrap; gap: 0.75rem; margin: 1rem 0 0.25rem; }
.gh-tally { font-size: 0.95rem; }
.gh-link { font-size: 0.9rem; font-weight: 600; }
.gh-pending { margin: 1rem 0 0.25rem; font-size: 0.9rem; }

/* Feedback */
.feedback-block { margin-top: 0.75rem; }
.feedback-block summary { cursor: pointer; color: var(--accent2); font-size: 0.92rem; }
.feedback-list { list-style: none; padding: 0; margin: 0.6rem 0; }
.feedback-list li { border-left: 3px solid var(--border); padding: 0.25rem 0 0.25rem 0.7rem; margin: 0.5rem 0; font-size: 0.92rem; }
.feedback-form { display: flex; flex-direction: column; gap: 0.4rem; max-width: 520px; }
.feedback-form input, .feedback-form textarea { border: 1px solid var(--border); border-radius: 6px; padding: 0.45rem; font: inherit; }
.feedback-form button { align-self: flex-start; cursor: pointer; background: var(--accent); color: #fff; border: 0; border-radius: 6px; padding: 0.45rem 0.9rem; }

/* Cluster member lists */
.cluster-members { margin: 0.4rem 0 0; padding-left: 1.2rem; font-size: 0.9rem; }
.cluster details summary { cursor: pointer; color: var(--accent2); font-size: 0.9rem; }

/* Changelog */
.changelog-entry { border-bottom: 1px solid var(--border); padding: 1rem 0; }

/* Consensus */
.consensus { border-left: 4px solid var(--accent); padding-left: 1rem; color: var(--fg); font-style: italic; }

/* Intro lead */
.intro .lead { font-size: 1.15rem; line-height: 1.6; color: var(--fg); max-width: 70ch; margin: 0.5rem 0 1.5rem; }

/* Most-cited papers list (full titles wrap; bar shows relative citations) */
.cited-list { list-style: none; margin: 0.6rem 0 1.5rem; padding: 0; }
.cited-item { display: grid; grid-template-columns: 1.6rem 1fr auto; align-items: baseline; gap: 0.6rem; padding: 0.45rem 0; border-bottom: 1px solid var(--border); }
.cited-rank { font-variant-numeric: tabular-nums; font-size: 0.85rem; text-align: right; }
.cited-main { min-width: 0; }
.cited-track { display: block; margin-top: 0.3rem; height: 0.4rem; background: var(--card); border: 1px solid var(--border); border-radius: 4px; overflow: hidden; }
.cited-fill { display: block; height: 100%; background: linear-gradient(90deg, var(--accent2), var(--accent)); }
.cited-count { font-variant-numeric: tabular-nums; font-size: 0.9rem; font-weight: 600; color: var(--accent); white-space: nowrap; }

/* Concept prevalence bars */
.concept-bars { list-style: none; margin: 0.6rem 0 1.4rem; padding: 0; }
.concept-bar { display: grid; grid-template-columns: minmax(140px, 16rem) 1fr auto; align-items: center; gap: 0.6rem; padding: 0.18rem 0; }
.concept-name { font-size: 0.92rem; }
.concept-track { background: var(--card); border: 1px solid var(--border); border-radius: 6px; height: 0.8rem; overflow: hidden; }
.concept-fill { display: block; height: 100%; background: linear-gradient(90deg, var(--accent2), var(--accent)); }
.concept-count { font-variant-numeric: tabular-nums; font-size: 0.85rem; min-width: 2ch; text-align: right; }
/* "rising momentum" badge on the future-directions summary */
.fd-recent { display: inline-block; margin-left: 0.4rem; padding: 0 0.4rem; border-radius: 999px;
  background: #f0fff4; border: 1px solid #c6f6d5; color: var(--accent); font-size: 0.72rem;
  font-weight: 600; vertical-align: middle; white-space: nowrap; }
@media (max-width: 560px) {
  .concept-bar { grid-template-columns: 1fr auto; }
  .concept-track { grid-column: 1 / -1; order: 3; }
}

/* Footer */
.site-footer { border-top: 1px solid var(--border); background: var(--card); margin-top: 2rem; }
.site-footer .container { padding-top: 1.25rem; padding-bottom: 1.25rem; }
.credits { color: var(--muted); font-size: 0.88rem; margin: 0; }

@media (max-width: 560px) {
  .keyphrases { columns: 1; }
  .nav a { margin-left: 0.6rem; }
}