/* ============================================================
   Climate Questions: minimal design system
   One accent color, system fonts, light/dark from the same tokens.
   ============================================================ */

:root {
  color-scheme: light dark;

  --page:            #f9f9f7;
  --surface:         #fcfcfb;
  --ink:             #0b0b0b;
  --ink-secondary:   #52514e;
  --ink-muted:       #898781;
  --hairline:        #e1e0d9;
  --border:          rgba(11, 11, 11, 0.10);
  --accent:          #2a78d6;
  --accent-ink:      #ffffff;

  /* chart tokens (validated palette, light mode) */
  --series-1:        #2a78d6;
  --series-2:        #008300;
  --grid:            #e1e0d9;
  --axis:            #c3c2b7;

  /* status palette (fixed scale, same steps in light and dark) */
  --status-good:      #0ca30c;
  --status-warning:   #fab219;
  --status-serious:   #ec835a;
  --status-critical:  #d03b3b;

  --measure: 42rem;
  --radius: 10px;
  font-size: 17px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --page:          #0d0d0d;
    --surface:       #1a1a19;
    --ink:           #ffffff;
    --ink-secondary: #c3c2b7;
    --ink-muted:     #898781;
    --hairline:      #2c2c2a;
    --border:        rgba(255, 255, 255, 0.10);
    --accent:        #3987e5;

    --series-1:      #3987e5;
    --series-2:      #008300;
    --grid:          #2c2c2a;
    --axis:          #383835;
  }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}

body {
  margin: 0;
  background: var(--page);
  color: var(--ink);
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-underline-offset: 2px; }
a:hover { text-decoration-thickness: 2px; }

/* ---------- layout chrome ---------- */

.site-header {
  max-width: var(--measure);
  margin: 0 auto;
  padding: 2rem 1.25rem 0;
}

.site-header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.site-name {
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.01em;
  color: var(--ink);
  text-decoration: none;
}
.site-name span { color: var(--accent); }

.site-nav a {
  color: var(--ink-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 600;
}
.site-nav a:hover { color: var(--accent); }

.site-tag {
  margin: 0.15rem 0 0;
  color: var(--ink-muted);
  font-size: 0.9rem;
}

main {
  max-width: var(--measure);
  margin: 0 auto;
  padding: 1.5rem 1.25rem 4rem;
}

.site-footer {
  max-width: var(--measure);
  margin: 0 auto;
  padding: 1.5rem 1.25rem 3rem;
  border-top: 1px solid var(--hairline);
  color: var(--ink-muted);
  font-size: 0.85rem;
}

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

/* ---------- progress bar ---------- */

.progress {
  position: fixed;
  inset: 0 0 auto 0;
  height: 3px;
  background: transparent;
  z-index: 10;
}
.progress-fill {
  height: 100%;
  width: 0%;
  background: var(--accent);
  transition: width 0.35s ease;
}

/* ---------- landing page ---------- */

.intro {
  margin: 2.5rem 0 2.75rem;
}
.intro h1 {
  font-size: clamp(1.7rem, 4.5vw, 2.4rem);
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin: 0 0 0.75rem;
}
.intro p {
  color: var(--ink-secondary);
  max-width: 36rem;
  margin: 0;
}

.search {
  margin: 0 0 1.75rem;
}

.search-input {
  display: block;
  width: 100%;
  font: inherit;
  font-size: 1rem;
  color: var(--ink);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.7rem 1rem;
}
.search-input::placeholder { color: var(--ink-muted); }
.search-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 18%, transparent);
}

.search-empty {
  color: var(--ink-muted);
  padding: 0.5rem 0 1rem;
}

.card-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1rem;
}

.card {
  display: block;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.4rem 1.5rem 1.25rem;
  text-decoration: none;
  color: inherit;
  transition: border-color 0.15s ease, transform 0.15s ease;
}
.card:hover, .card:focus-visible {
  border-color: var(--accent);
  transform: translateY(-1px);
}

.card-claim {
  font-size: 1.25rem;
  font-weight: 650;
  line-height: 1.35;
  letter-spacing: -0.01em;
  margin: 0 0 0.5rem;
}
.card-claim::before { content: "“"; color: var(--accent); }
.card-claim::after  { content: "”"; color: var(--accent); }

.card-teaser {
  margin: 0 0 0.85rem;
  color: var(--ink-secondary);
  font-size: 0.95rem;
}

.card-meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--ink-muted);
  font-size: 0.8rem;
}
.chip {
  border: 1px solid var(--hairline);
  border-radius: 999px;
  padding: 0.1rem 0.6rem;
}

/* ---------- essay: the claim hero ---------- */

.claim-hero {
  min-height: 62vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 2rem 0 3rem;
}

.claim-kicker {
  color: var(--ink-muted);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin: 0 0 1rem;
}

.claim-quote {
  font-size: clamp(1.6rem, 5vw, 2.6rem);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.02em;
  margin: 0 0 2rem;
  max-width: 34rem;
}
.claim-quote::before { content: "“"; color: var(--accent); }
.claim-quote::after  { content: "”"; color: var(--accent); }

.btn {
  appearance: none;
  border: none;
  border-radius: 999px;
  background: var(--accent);
  color: var(--accent-ink);
  font: inherit;
  font-weight: 600;
  font-size: 1rem;
  padding: 0.7rem 1.6rem;
  cursor: pointer;
  align-self: flex-start;
  transition: transform 0.15s ease, opacity 0.15s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); opacity: 0.9; }

.btn-ghost {
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--accent);
}

/* ---------- essay: beats ---------- */

.beat {
  border-top: 1px solid var(--hairline);
  padding: 2.25rem 0 0.5rem;
  animation: beat-in 0.5s ease both;
}

@keyframes beat-in {
  from { opacity: 0; transform: translateY(14px); }
  to   { opacity: 1; transform: none; }
}

.beat h2 {
  font-size: 1.05rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--accent);
  margin: 0 0 0.9rem;
}

.beat p { margin: 0 0 1rem; max-width: var(--measure); }
.beat p:last-child { margin-bottom: 0; }
.beat strong { font-weight: 650; }
.beat ul, .beat ol { padding-left: 1.3rem; color: inherit; }
.beat li { margin-bottom: 0.4rem; }

.beat blockquote {
  margin: 1.25rem 0;
  padding: 0.2rem 0 0.2rem 1.1rem;
  border-left: 3px solid var(--accent);
  color: var(--ink-secondary);
  font-style: italic;
}

.essay-controls {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 2rem 0 1rem;
}
.essay-controls .btn-ghost {
  margin-left: auto;
}

/* ---------- verdict card ---------- */

.verdict {
  margin: 2.5rem 0 1.5rem;
  background: var(--surface);
  border: 1px solid var(--accent);
  border-radius: var(--radius);
  padding: 1.5rem 1.6rem;
  animation: beat-in 0.5s ease both;
}
.verdict-label {
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin: 0 0 0.6rem;
}
.verdict p {
  margin: 0;
  font-size: 1.2rem;
  font-weight: 600;
  line-height: 1.45;
  letter-spacing: -0.01em;
}

/* ---------- sources & essay footer ---------- */

.sources {
  margin-top: 2rem;
  font-size: 0.85rem;
  color: var(--ink-secondary);
}
.sources h3 {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-muted);
  margin: 0 0 0.5rem;
}
.sources ol { margin: 0; padding-left: 1.2rem; }
.sources li { margin-bottom: 0.3rem; overflow-wrap: anywhere; }

.essay-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: space-between;
  margin-top: 2.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--hairline);
  font-size: 0.95rem;
}

/* ---------- figures (Plotly charts) ---------- */

.figure {
  margin: 1.75rem 0;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.1rem 1.1rem 0.9rem;
}
.figure-title {
  font-size: 0.9rem;
  font-weight: 650;
  margin: 0 0 0.15rem;
}
.figure-sub {
  font-size: 0.78rem;
  color: var(--ink-muted);
  margin: 0 0 0.75rem;
}
.figure-caption {
  font-size: 0.78rem;
  color: var(--ink-muted);
  margin: 0.6rem 0 0;
}

.plotly-figure {
  min-height: 300px;
}
.plotly-figure--tall {
  min-height: 380px;
}
.plotly-figure .js-plotly-plot,
.plotly-figure .plot-container {
  width: 100%;
}
/* Plotly's own hover box replaces the drop shadow of a floating tooltip;
   just let its border read against the card. */
.js-plotly-plot .hoverlayer .hovertext rect { rx: 6px; }

.figure-data {
  margin-top: 0.9rem;
}
.figure-data summary {
  cursor: pointer;
  font-size: 0.8rem;
  font-weight: 650;
  color: var(--accent);
  padding: 0.15rem 0;
}
.figure-data .model-table-wrap {
  margin: 0.75rem 0 0;
  max-height: 16rem;
  overflow-y: auto;
}
.figure-data .model-table-wrap + .model-table-wrap {
  margin-top: 1.25rem;
}
.figure-data .model-table { font-size: 0.82rem; }
.figure-data .model-table th, .figure-data .model-table td {
  padding: 0.5rem 1rem 0.5rem 0;
}

/* ---------- AI model tracker ---------- */

.grade-badge {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  padding: 0.15rem 0.7rem;
  font-size: 0.78rem;
  font-weight: 650;
  color: var(--ink);
  border: 1px solid var(--gb, var(--hairline));
  background: color-mix(in srgb, var(--gb, var(--hairline)) 20%, var(--surface));
  white-space: nowrap;
}
.grade-badge--accurate      { --gb: var(--status-good); }
.grade-badge--hedged        { --gb: var(--status-warning); }
.grade-badge--false-balance { --gb: var(--status-serious); }
.grade-badge--denialist     { --gb: var(--status-critical); }

.methodology {
  margin: 0 0 2.5rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.4rem;
}
.methodology summary {
  cursor: pointer;
  font-weight: 650;
  color: var(--accent);
  padding: 0.15rem 0;
}
.methodology-body { margin-top: 1rem; }
.methodology-questions {
  padding-left: 1.3rem;
  color: var(--ink-secondary);
}
.methodology-questions li { margin-bottom: 0.5rem; }
.methodology-rubric { margin: 1rem 0 0; }
.methodology-rubric dt { margin: 0.85rem 0 0.3rem; }
.methodology-rubric dt:first-child { margin-top: 0; }
.methodology-rubric dd {
  margin: 0;
  color: var(--ink-secondary);
  font-size: 0.9rem;
}

.model-empty { color: var(--ink-muted); padding: 0.5rem 0 1rem; }

.model-table-wrap {
  overflow-x: auto;
  margin: 0 0 1rem;
}
.model-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}
.model-table caption {
  caption-side: top;
  text-align: left;
  color: var(--ink-muted);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 0.85rem;
}
.model-table th, .model-table td {
  padding: 0.7rem 1.4rem 0.7rem 0;
  border-bottom: 1px solid var(--hairline);
  text-align: left;
  white-space: nowrap;
  vertical-align: top;
}
.model-table thead th {
  color: var(--ink-muted);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 600;
}
.model-table tbody th { font-weight: 650; }
.model-vendor {
  display: block;
  color: var(--ink-muted);
  font-size: 0.75rem;
  font-weight: 400;
}
.model-cell { text-decoration: none; }
.model-cell-empty { color: var(--ink-muted); }
.model-cell-version {
  display: block;
  color: var(--ink-muted);
  font-size: 0.72rem;
  font-weight: 400;
  letter-spacing: 0.01em;
}

/* grade distribution: stacked bar + per-grade counts */
.grade-dist {
  display: inline-flex;
  flex-direction: column;
  gap: 0.4rem;
  min-width: 96px;
  text-decoration: none;
  color: inherit;
}
.grade-dist--summary { margin: 0.6rem 0 0.2rem; }

.grade-dist-bar {
  display: flex;
  gap: 2px;
  height: 8px;
}
.grade-dist-bar:empty { display: none; }
.grade-dist-seg {
  min-width: 5px;
  border-radius: 2px;
  background: var(--gb, var(--hairline));
}
.grade-dist-seg--accurate      { --gb: var(--status-good); }
.grade-dist-seg--hedged        { --gb: var(--status-warning); }
.grade-dist-seg--false-balance { --gb: var(--status-serious); }
.grade-dist-seg--denialist     { --gb: var(--status-critical); }

.grade-dist-counts {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem 0.7rem;
  align-items: center;
}
.grade-dist-count {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.8rem;
  white-space: nowrap;
}
.grade-dist-swatch {
  width: 9px;
  height: 9px;
  border-radius: 3px;
  flex: none;
  background: var(--gb, var(--hairline));
}
.grade-dist-count--accurate      { --gb: var(--status-good); }
.grade-dist-count--hedged        { --gb: var(--status-warning); }
.grade-dist-count--false-balance { --gb: var(--status-serious); }
.grade-dist-count--denialist     { --gb: var(--status-critical); }
.grade-dist-num { color: var(--ink); font-weight: 650; }
.grade-dist-label { color: var(--ink-secondary); }

.grade-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1.1rem;
  margin: 0.25rem 0 1.5rem;
  font-size: 0.8rem;
}
.grade-legend-item {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  color: var(--ink-secondary);
}

.model-back {
  display: inline-block;
  margin: 0.5rem 0 0.5rem;
  color: var(--accent);
  text-decoration: none;
  font-size: 0.9rem;
}

.model-flag {
  margin: 0 0 2rem;
  padding: 1rem 1.25rem;
  border: 1px solid var(--status-critical);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--status-critical) 10%, var(--surface));
}
.model-flag p { margin: 0; font-weight: 600; }

.model-month {
  border-top: 1px solid var(--hairline);
  padding: 1.75rem 0;
}
.model-month h2 { font-size: 1.1rem; margin: 0 0 0.5rem; }
.model-month--collapsed summary {
  cursor: pointer;
  font-weight: 650;
  font-size: 1.05rem;
}
.model-month--collapsed .model-month-body { padding-top: 1rem; }
.model-month-meta {
  color: var(--ink-muted);
  font-size: 0.85rem;
  margin: 0 0 1.25rem;
}
.model-answer {
  margin: 0 0 1.75rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px dashed var(--hairline);
}
.model-answer:last-child { border-bottom: none; margin-bottom: 0; }
.model-answer-prompt { font-weight: 600; margin: 0 0 0.6rem; }
.model-answer blockquote {
  margin: 0.85rem 0;
  padding: 0.2rem 0 0.2rem 1.1rem;
  border-left: 3px solid var(--hairline);
  color: var(--ink-secondary);
  font-style: italic;
}
.model-answer-note {
  margin: 0.5rem 0 0;
  color: var(--ink-secondary);
  font-size: 0.9rem;
}

/* ---------- 404 ---------- */

.notfound { padding: 3rem 0; color: var(--ink-secondary); }

@media (max-width: 480px) {
  :root { font-size: 16px; }
  .claim-hero { min-height: 52vh; }
}