/* Provenance — Facing Pages (design direction 1b, Classical system).
   Tokens + base components come from classical.css (loaded first); this file
   holds the Provenance-specific classes (ported from the design doc's <style>)
   and the book-spread layout. Answer on the verso, live source on the recto. */

body { background: var(--color-bg); }
.wrap { max-width: 1240px; margin: 0 auto; padding: 0 24px; }
.hidden { display: none !important; }
.muted { color: var(--color-neutral-600); }

/* ── masthead ─────────────────────────────────────────────────────────── */
.prov-head { border-bottom: 1px solid var(--color-divider); background: var(--color-bg); }
.prov-masthead { display: flex; align-items: baseline; gap: 22px; padding: 22px 0 0; }
.prov-brand { font-family: var(--font-heading); font-weight: 600; font-size: 30px; letter-spacing: -0.015em; }
.prov-kicker { font-family: var(--font-body); font-size: 10.5px; letter-spacing: 0.16em;
  text-transform: uppercase; color: var(--color-neutral-600); }
.prov-tabs { margin-left: auto; display: flex; gap: 22px; align-self: flex-end; }
.prov-lead { font-family: var(--font-body); font-size: 14px; line-height: 1.6;
  color: var(--color-neutral-700); max-width: 720px; margin: 12px 0 18px; }
.prov-lead b { font-family: var(--font-heading); color: var(--color-text); }

.prov-tab { font-family: var(--font-body); font-size: 14px; text-decoration: none;
  color: var(--color-neutral-600); padding: 5px 2px; border: none;
  border-bottom: 2px solid transparent; cursor: pointer; background: none;
  -webkit-appearance: none; appearance: none; }
.prov-tab:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 2px; }
.prov-tab.on { color: var(--color-text); border-bottom-color: var(--color-accent); }

/* ── the spread card ──────────────────────────────────────────────────── */
main { padding: 26px 0 80px; }
.view { display: none; }
.view.active { display: block; }
.prov-card { background: var(--color-bg); border: 1px solid var(--color-divider);
  box-shadow: var(--shadow-md); overflow: hidden; position: relative; }

.prov-qbar { display: flex; align-items: center; gap: 14px;
  border-bottom: 1px solid var(--color-divider); padding: 16px 36px; }
.prov-q-mark { font-family: var(--font-heading); font-size: 18px; color: var(--color-neutral-500); }
.prov-input { flex: 1; width: 100%; font-family: var(--font-body); font-size: 16px;
  color: var(--color-text); background: transparent; border: none; outline: none;
  caret-color: var(--color-accent); }

.prov-controls { display: flex; align-items: center; gap: 14px;
  padding: 12px 36px; border-bottom: 1px solid var(--color-divider);
  font-family: var(--font-body); font-size: 11.5px; color: var(--color-neutral-600); }
.prov-status { margin-left: auto; color: var(--color-accent); }

/* the two-page grid */
.prov-spread { display: grid; grid-template-columns: 1fr 1px 1fr; }
.prov-spread.eval { grid-template-columns: 1fr 1px 1.15fr; }
.prov-gutter { background: var(--color-divider); }
.prov-verso { padding: 30px 36px 40px; }
.prov-recto { padding: 30px 36px 40px; background: var(--color-surface); position: relative; }
.prov-eyebrow { font-family: var(--font-body); font-size: 10px; letter-spacing: 0.18em;
  text-transform: uppercase; color: var(--color-neutral-600); margin-bottom: 16px; }
.prov-eyebrow.accent { color: var(--color-accent); }

.prov-answer { font-family: var(--font-body); font-size: 17.5px; line-height: 1.74;
  text-align: justify; hyphens: auto; margin: 0; }
.prov-note-box { border: 1px solid var(--color-divider); border-left: 2px solid var(--color-accent);
  border-radius: var(--radius-md); padding: 16px 18px; }
.prov-note-box h4 { font-size: 16px; margin: 0 0 7px; }
.prov-note-box p { font-family: var(--font-body); font-size: 14px; line-height: 1.62;
  color: var(--color-neutral-700); margin: 0; }
.mono { font-family: ui-monospace, Menlo, monospace; font-size: 0.86em; }

/* citation chips inside the answer */
.prov-cite { color: var(--color-accent); font-family: var(--font-heading); font-weight: 600;
  cursor: pointer; text-decoration: none; white-space: nowrap; }
.prov-cite:hover, .prov-cite.on { text-decoration: underline; }

/* ── the source rail (verso) ─────────────────────────────────────────── */
.prov-rail-head { display: flex; align-items: baseline; justify-content: space-between; margin-bottom: 10px; }
.prov-fsrc { border-radius: var(--radius-sm); padding: 9px 12px; cursor: pointer;
  transition: background .12s ease, box-shadow .12s ease; }
.prov-fsrc:hover { background: color-mix(in srgb, var(--color-text) 4%, transparent); }
.prov-fsrc.on { box-shadow: inset 3px 0 0 var(--color-accent);
  background: color-mix(in srgb, var(--color-accent) 7%, transparent); }
.prov-fsrc-row { display: flex; align-items: baseline; gap: 8px; font-family: var(--font-body); font-size: 13.5px; }
.prov-fnum { color: var(--color-accent); font-family: var(--font-heading); font-weight: 600; }
.prov-fco { font-family: var(--font-heading); font-weight: 600; font-size: 14px; }
.prov-fmeta { color: var(--color-neutral-600); }
.prov-fscore { margin-left: auto; color: var(--color-neutral-500);
  font-variant-numeric: tabular-nums; font-size: 11px; }
.prov-fsrc.dim { opacity: 0.7; }
.prov-fsrc.dim .prov-fnum { color: var(--color-neutral-500); }

/* ── the source plate (recto) ────────────────────────────────────────── */
.prov-plate-co { font-family: var(--font-heading); font-weight: 600; font-size: 19px; }
.prov-plate-meta { font-family: var(--font-body); font-size: 12.5px; color: var(--color-neutral-600);
  margin: 2px 0 16px; font-variant-numeric: tabular-nums; }
.prov-plate-text { font-family: var(--font-body); font-size: 15px; line-height: 1.72;
  color: var(--color-neutral-700); margin: 0; }
.prov-mark { background: var(--color-accent-100); box-shadow: inset 2px 0 0 var(--color-accent); padding: 1px 2px; }
.prov-recto-open { position: absolute; top: 14px; right: 16px; display: flex; align-items: center;
  gap: 6px; font-family: var(--font-body); font-size: 10.5px; color: var(--color-accent); pointer-events: none; }
.prov-recto.zoom { cursor: zoom-in; }

.prov-ghost { background: transparent; border: 1px solid var(--color-divider);
  color: var(--color-neutral-700); font-family: var(--font-body); font-size: 11.5px;
  padding: 4px 10px; border-radius: var(--radius-md); cursor: pointer; font-variant-numeric: tabular-nums; }
.prov-ghost:hover { border-color: var(--color-accent); color: var(--color-accent); }

/* ── loading: pipeline stepper + skeletons ───────────────────────────── */
.prov-stepper { display: flex; align-items: center; padding: 14px 36px;
  border-bottom: 1px solid var(--color-divider); }
.prov-step { display: flex; align-items: center; gap: 9px; font-family: var(--font-body);
  font-size: 12px; color: var(--color-neutral-500); }
.prov-step.on { color: var(--color-text); }
.prov-step .bead { width: 8px; height: 8px; border-radius: 50%; border: 1px solid var(--color-neutral-400); }
.prov-step.done .bead, .prov-step.now .bead { background: var(--color-accent); border-color: var(--color-accent); }
.prov-step-fill { flex: 1; height: 1px; background: var(--color-divider); margin: 0 12px; max-width: 70px; }
.prov-step-fill.on { background: var(--color-accent); }
@keyframes prov-pulse { 0% { box-shadow: 0 0 0 0 color-mix(in srgb, var(--color-accent) 55%, transparent); }
  70% { box-shadow: 0 0 0 6px transparent; } 100% { box-shadow: 0 0 0 0 transparent; } }
.prov-pulse { animation: prov-pulse 1.4s ease-out infinite; }
@keyframes prov-sk { 0%, 100% { opacity: .45; } 50% { opacity: .8; } }
.prov-sk { background: linear-gradient(90deg, var(--color-neutral-200), var(--color-neutral-300), var(--color-neutral-200));
  border-radius: 3px; animation: prov-sk 1.3s ease-in-out infinite; }
@keyframes prov-flash { from { background: var(--color-accent-100); } to { background: transparent; } }
.prov-flash { animation: prov-flash 1.3s ease; }

/* ── full-filing overlay (recto → whole document), scoped to the card ── */
.prov-overlay { position: absolute; inset: 0; z-index: 5; display: none;
  align-items: stretch; justify-content: flex-end;
  background: color-mix(in srgb, var(--color-neutral-900) 55%, transparent); }
.prov-overlay.open { display: flex; }
.prov-overlay-panel { width: 64%; background: var(--color-bg); box-shadow: var(--shadow-lg);
  display: flex; flex-direction: column; height: 100%; }
.prov-overlay-head { display: flex; align-items: baseline; gap: 14px; padding: 18px 28px;
  border-bottom: 1px solid var(--color-divider); }
.prov-overlay-title { font-family: var(--font-heading); font-weight: 600; font-size: 19px; }
.prov-overlay-sub { font-family: var(--font-body); font-size: 11px; color: var(--color-neutral-600); font-variant-numeric: tabular-nums; }
.prov-overlay-crumbs { display: flex; align-items: center; gap: 14px; padding: 9px 28px;
  border-bottom: 1px solid var(--color-divider); font-family: var(--font-body); font-size: 11px; color: var(--color-neutral-600); }
.prov-overlay-scroll { overflow: auto; padding: 30px 40px; font-family: var(--font-body);
  font-size: 15px; line-height: 1.8; color: var(--color-neutral-700); text-align: justify; hyphens: auto; white-space: pre-wrap; }

/* ── Evaluation spread ───────────────────────────────────────────────── */
.prov-arg { font-family: var(--font-body); font-size: 16.5px; line-height: 1.74;
  text-align: justify; hyphens: auto; margin: 0 0 22px; }
.prov-toggle-row { display: flex; align-items: center; gap: 12px; padding: 14px 0;
  border-top: 1px solid var(--color-divider); border-bottom: 1px solid var(--color-divider);
  font-family: var(--font-body); font-size: 13px; }
.prov-toggle-row .rr-side { margin-left: auto; font-size: 11px; color: var(--color-neutral-500); }
.prov-toggle { width: 34px; height: 19px; border: 1px solid var(--color-accent); border-radius: 10px;
  position: relative; display: inline-block; cursor: pointer; transition: background .18s ease; flex: none; }
.prov-toggle .knob { position: absolute; top: 1px; left: 16px; width: 15px; height: 15px;
  border-radius: 50%; background: var(--color-accent); transition: left .18s ease, background .18s ease; }
.prov-toggle.off { border-color: var(--color-neutral-400); }
.prov-toggle.off .knob { left: 1px; background: var(--color-neutral-400); }
.rr-state { color: var(--color-accent); font-family: var(--font-heading); font-weight: 600; }

.prov-metrics { display: grid; grid-template-columns: 1fr 1fr 1fr; margin-top: 24px; }
.prov-metric { padding: 0 18px; }
.prov-metric:first-child { padding-left: 0; }
.prov-metric + .prov-metric { border-left: 1px solid var(--color-divider); }
.prov-metric-k { font-family: var(--font-body); font-size: 10px; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--color-neutral-600); }
.prov-metric-v { font-family: var(--font-heading); font-weight: 600; font-size: 40px;
  font-variant-numeric: tabular-nums; line-height: 1.1; margin-top: 4px; }
.prov-metric-d { font-family: var(--font-body); font-size: 11.5px; font-variant-numeric: tabular-nums; color: var(--color-accent-700); }
.prov-metric-d.base { color: var(--color-neutral-500); }
.prov-fignote { font-family: var(--font-body); font-size: 13px; line-height: 1.6;
  color: var(--color-neutral-600); margin: 0; font-style: italic; }

.prov-ledger-head { display: flex; align-items: baseline; justify-content: space-between; margin-bottom: 6px; }
#rank-chart { width: 100%; height: auto; font-family: var(--font-body); }
.prov-rankrow line, .prov-rankrow .dot, .prov-rankrow text { transition: all .5s cubic-bezier(.4,0,.2,1); }
.prov-hit { stroke: transparent; stroke-width: 12; cursor: pointer; }

.prov-tip { position: absolute; pointer-events: none; z-index: 8; display: none;
  background: var(--color-bg); border: 1px solid var(--color-divider); border-radius: var(--radius-md);
  padding: 8px 11px; max-width: 260px; font-family: var(--font-body); font-size: 12px;
  box-shadow: var(--shadow-md); }
.prov-tip.on { display: block; }
.prov-tip b { font-family: var(--font-heading); }

/* table-view twin, below the fold */
.prov-tables { margin-top: 30px; }
.prov-tables summary { cursor: pointer; font-family: var(--font-body); font-size: 12.5px;
  color: var(--color-neutral-600); padding: 4px 0; }
.prov-tables summary:hover { color: var(--color-accent); }
table.eval { width: 100%; border-collapse: collapse; margin-top: 14px; font-family: var(--font-body);
  font-size: 13.5px; font-variant-numeric: tabular-nums; }
table.eval th, table.eval td { padding: 9px 10px; text-align: right; border-bottom: 1px solid var(--color-divider); }
table.eval th:first-child, table.eval td:first-child { text-align: left; }
table.eval thead th { color: var(--color-neutral-600); font-size: 11px; letter-spacing: 0.06em; text-transform: uppercase; }
table.eval tr.trained td { color: var(--color-accent-700); font-weight: 600; }
.prov-q-cell { max-width: 460px; font-size: 12.5px; color: var(--color-neutral-800); }

@media (max-width: 980px) {
  .prov-spread, .prov-spread.eval { grid-template-columns: 1fr; }
  .prov-gutter { height: 1px; }
  .prov-recto { background: var(--color-surface); }
}
@media (prefers-reduced-motion: reduce) {
  .prov-rankrow line, .prov-rankrow .dot, .prov-rankrow text { transition: none; }
  .prov-sk, .prov-pulse { animation: none; }
}