/* ───────────────────────────────────────────────────────────────
   Infinite Conversations — Agent Studio context APIs demo

   Design notes
   · Subject: a conversation that folds instead of overflowing. The
     signature element is "the fold" — the ledger's creased bands and
     the crease glyph in the wordmark.
   · Status colors (ok / approaching / over) are mutually exclusive
     states, each shipped with a shape-differentiated dot AND a text
     label, so identity is never carried by color alone.
   ─────────────────────────────────────────────────────────────── */


/* ── The meter (cost / savings strip) ─────────────────────────────
   A KPI row of three stat tiles, not a chart: three headline numbers whose job
   is magnitude and one comparison, which is what a stat tile is for. Saved is
   the tile the reader came for, so it is the one with the crease rule and the
   larger figure — the fold's own colour, because the fold is what did the
   saving. Sticky at top:0 as body's first child: never moves, never overlaps.
   ─────────────────────────────────────────────────────────────── */

.costbar {
  position: sticky;
  top: 0;
  z-index: 30;
  background: var(--surface);
  border-bottom: 1px solid var(--line);
  box-shadow: light-dark(0 10px 22px -22px rgba(20, 22, 42, 0.55), 0 12px 26px -24px #000);
}
.costbar-inner {
  display: flex;
  align-items: center;
  gap: 20px;
  max-width: 1240px;
  margin: 0 auto;
  padding: 7px 28px;
}
.costbar-eyebrow {
  flex: none;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-3);
  white-space: nowrap;
}

.cost-tiles { display: flex; align-items: center; gap: 15px; min-width: 0; }
.cost-op { font-family: var(--mono); font-size: 13px; color: var(--ink-3); }

/* stat-tile contract: label · value · sub. The left rule carries which tile it
   is; no tile wears a fill, so nothing here competes with the ledger below. */
.cost-tile {
  display: grid;
  gap: 1px;
  min-width: 0;
  padding: 1px 0 1px 9px;
  border-left: 2px solid var(--line-strong);
  cursor: help;
}
.ct-label {
  font-size: 9.5px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-3);
  white-space: nowrap;
}
.ct-value {
  /* tabular figures are deliberate here and only here: the value animates, and
     proportional digits would re-measure the whole strip on every frame.
     overflow:hidden is the odometer's mask — the digits roll behind it. */
  font-family: var(--mono);
  font-size: 15.5px;
  font-variant-numeric: tabular-nums;
  line-height: 1.2;
  letter-spacing: -0.01em;
  overflow: hidden;
}
.ct-sub {
  display: flex;
  align-items: center;
  gap: 7px;
  font-family: var(--mono);
  font-size: 10px;
  font-variant-numeric: tabular-nums;
  color: var(--ink-3);
  white-space: nowrap;
}

.cost-tile.is-hero { border-left-color: var(--crease); padding-left: 11px; }
.cost-tile.is-hero .ct-label { color: var(--crease); }
.cost-tile.is-hero .ct-value { font-size: 22px; letter-spacing: -0.025em; }
/* the fold has been billed but not yet repaid: say so rather than showing a
   cheerful zero */
.cost-tile.is-hero.is-behind { border-left-color: var(--warn); }
.cost-tile.is-hero.is-behind .ct-label,
.cost-tile.is-hero.is-behind .ct-value { color: var(--warn); }

.ct-badge, .ct-est {
  margin-left: 5px;
  padding: 0 5px;
  border-radius: 999px;
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0;
  text-transform: none;
  white-space: nowrap;
}
.ct-badge { border: 1px solid var(--over); color: var(--over); }
.ct-est { border: 1px dashed var(--line-strong); color: var(--ink-3); }

/* the savings ratio. The track is 0→100% of naive by construction — there is no
   axis to truncate, and a full track means every penny was saved. */
.ct-chip { display: inline-flex; align-items: center; gap: 6px; }
.ct-chip-num { color: var(--crease); }
.cost-tile.is-hero.is-behind .ct-chip-num { color: var(--warn); }
.ct-chip-track {
  width: 34px; height: 4px;
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: 2px;
  overflow: hidden;
}
.ct-chip-track > span {
  display: block;
  height: 100%;
  width: 0;
  background: var(--crease);
  border-radius: 0 2px 2px 0;
  transition: width 0.5s cubic-bezier(0.2, 0.7, 0.2, 1);
}

/* one digit, one span, so only the digits that changed move */
.ct-value .dg { display: inline-block; }

.cost-toggle {
  display: none;
  margin-left: auto;
  padding: 4px 10px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: var(--surface);
  color: var(--ink-3);
  font-family: var(--body);
  font-size: 11px;
  cursor: pointer;
}
.cost-toggle:hover { color: var(--ink); border-color: var(--ink-3); }

@media (max-width: 720px) {
  .costbar-inner { gap: 12px; padding: 6px 16px; }
  .costbar-eyebrow { display: none; }
  .cost-tiles { gap: 11px; }
  .cost-op { display: none; }
}
/* phone: the saving is the headline, the two operands are one tap away */
@media (max-width: 420px) {
  .cost-toggle { display: inline-flex; }
  .costbar[data-open="0"] .cost-tile:not(.is-hero) { display: none; }
  .costbar[data-open="1"] .costbar-inner { flex-wrap: wrap; row-gap: 6px; }
  /* a grid, not a flex row: minmax(0,…) is what stops three tiles whose content
     is wider than a third of a phone from pushing the page sideways */
  .costbar[data-open="1"] .cost-tiles {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr) minmax(0, 1.15fr);
    gap: 8px;
    flex: 1 1 100%;
  }
  .costbar[data-open="1"] .ct-label { min-width: 0; overflow: hidden; text-overflow: ellipsis; }
  /* the sub line wraps rather than ellipsising: "80% of naive" is the answer, and
     a clipped answer is worse than a two-line strip (which nothing overlaps) */
  .costbar[data-open="1"] .ct-sub { min-width: 0; flex-wrap: wrap; gap: 0 7px; }
  .costbar[data-open="1"] .ct-value { font-size: 12.5px; }
  .costbar[data-open="1"] .cost-tile.is-hero .ct-value { font-size: 17px; }
  .costbar[data-open="1"] .ct-chip-track { display: none; }
  .cost-tile.is-hero .ct-value { font-size: 20px; }
  /* the full wording is 110px of a ~107px column. font-size:0 hides it from the
     eye and keeps it in the accessibility tree, where it is the useful version;
     the glyph plus the tile's tooltip carry it for everyone else. */
  .ct-badge { font-size: 0; padding: 0; border: 0; }
  .ct-badge::after {
    content: "✗";
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 14px; height: 14px;
    border: 1px solid var(--over);
    border-radius: 50%;
    font-size: 9px;
    line-height: 1;
    vertical-align: -3px;
  }
}

/* ── Masthead ─────────────────────────────────────────────────── */

.masthead {
  border-bottom: 1px solid var(--line);
  background:
    linear-gradient(180deg, var(--surface) 0%, var(--paper) 100%);
}
.masthead-inner {
  max-width: 1240px;
  margin: 0 auto;
  padding: 44px 28px 34px;
}
.eyebrow {
  margin: 0 0 18px;
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--ink-3);
}
.tag {
  display: inline-block;
  margin-left: 4px;
  padding: 1px 6px;
  border: 1px solid var(--crease);
  border-radius: 999px;
  color: var(--crease);
  font-size: 10px;
  letter-spacing: 0.06em;
}

h1 {
  margin: 0;
  font-family: var(--display);
  font-optical-sizing: auto;
  font-weight: 800;
  font-size: clamp(2.6rem, 8.4vw, 5.6rem);
  line-height: 0.9;
  letter-spacing: -0.035em;
}
/* the crease: a folded corner sitting between the two words */
.fold-mark {
  display: inline-block;
  width: 0.42em;
  height: 0.42em;
  margin: 0 0.14em 0.04em;
  background: linear-gradient(135deg, var(--crease) 0 50%, transparent 50% 100%);
  border: 1.5px solid var(--crease);
  border-radius: 2px;
  transform: rotate(-8deg);
  vertical-align: baseline;
}

.lede {
  max-width: 62ch;
  margin: 20px 0 0;
  font-size: 1.02rem;
  color: var(--ink-2);
}
.lede code {
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: 3px;
  padding: 1px 5px;
  color: var(--ink);
}

.masthead-meters {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: 34px;
  margin-top: 30px;
}
.hero-stat { display: flex; flex-direction: column; }
/* 34px between three stats does not fit a phone: they wrapped 2 + 1 with a hole */
@media (max-width: 620px) {
  .masthead-meters { gap: 18px 20px; margin-top: 22px; }
  .cta { margin-left: 0; }
}
.hero-num {
  font-family: var(--mono);
  font-size: clamp(1.5rem, 3.4vw, 2.1rem);
  font-variant-numeric: tabular-nums;
  line-height: 1;
  letter-spacing: -0.02em;
}
.hero-label {
  margin-top: 6px;
  font-size: 11.5px;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--ink-3);
}
.cta {
  margin-left: auto;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 18px;
  border: 1px solid var(--ink);
  border-radius: var(--radius);
  background: var(--ink);
  color: var(--paper);
  font-weight: 600;
  text-decoration: none;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.cta:hover {
  transform: translate(-2px, -2px);
  box-shadow: 4px 4px 0 var(--crease);
}

/* ── Layout ───────────────────────────────────────────────────── */

.grid {
  display: grid;
  grid-template-columns: minmax(340px, 430px) minmax(0, 1fr);
  gap: 22px;
  max-width: 1240px;
  margin: 26px auto;
  padding: 0 28px;
  align-items: start;
}
@media (max-width: 940px) {
  /* minmax(0,…) not 1fr: 1fr's auto minimum lets the ledger's nowrap bands
     force the column wider than the viewport */
  .grid { grid-template-columns: minmax(0, 1fr); }
}

.panel {
  min-width: 0;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 6px;
  box-shadow: var(--shadow);
  padding: 22px;
}
.panel-h {
  margin: 0 0 4px;
  font-family: var(--display);
  font-size: 0.94rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}
.panel-sub {
  margin: 0 0 14px;
  font-size: 12.8px;
  color: var(--ink-3);
}
.rule {
  border: 0;
  border-top: 1px solid var(--line);
  margin: 22px 0 18px;
}

.field-label {
  display: block;
  margin-bottom: 6px;
  font-size: 11.5px;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--ink-3);
}
textarea, input[type="text"], select {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--surface-2);
  color: var(--ink);
  font-family: var(--body);
  font-size: 14px;
}
textarea { font-family: var(--mono); font-size: 12.4px; resize: vertical; }
.hint { margin: 6px 0 0; font-size: 11.5px; color: var(--ink-3); }

.row { display: flex; align-items: center; gap: 10px; margin-top: 12px; flex-wrap: wrap; }
.field-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
@media (max-width: 520px) { .field-grid { grid-template-columns: 1fr; } }

.btn {
  padding: 9px 15px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--ink);
  font-family: var(--body);
  font-size: 13.5px;
  font-weight: 600;
  cursor: pointer;
}
.btn:hover:not(:disabled) { border-color: var(--ink-3); }
.btn:disabled { opacity: 0.45; cursor: not-allowed; }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
@media (prefers-color-scheme: dark) { .btn.primary { color: #12122a; } }
.btn.ghost { background: transparent; border-style: dashed; font-weight: 500; }
.file-btn {
  padding: 9px 15px;
  border: 1px dashed var(--line-strong);
  border-radius: var(--radius);
  font-size: 13.5px;
  cursor: pointer;
  color: var(--ink-2);
}
.file-btn:hover { border-color: var(--ink-3); }
.ingest-status { font-family: var(--mono); font-size: 12px; color: var(--ok); }

.url-label { margin-top: 18px; }
/* min-width:0 or the input's default intrinsic width pushes Fetch out of the row */
.url-row input { flex: 1 1 200px; min-width: 0; }
#url-status:empty { display: none; }
#url-status.is-working { color: var(--ink-2); }
#url-status.is-ok { color: var(--ok); }
#url-status.is-err { color: var(--over); }
/* the honest label: whose pipe the bytes came down */
.via {
  font-family: var(--mono);
  font-size: 10.5px;
  padding: 1px 5px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  color: var(--ink-3);
  white-space: nowrap;
}

.info {
  width: 15px; height: 15px;
  margin-left: 4px;
  padding: 0;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  background: transparent;
  color: var(--ink-3);
  font-size: 10px;
  line-height: 1;
  cursor: help;
}
.info:hover { color: var(--ink); border-color: var(--ink-3); }

/* ── Meter ────────────────────────────────────────────────────── */

.meter-figure { margin: 0; }
.meter-figure figcaption {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 10px;
  margin-bottom: 8px;
}
.meter-title { font-size: 12.5px; color: var(--ink-2); }
.meter-read {
  font-family: var(--mono);
  font-size: 12.5px;
  font-variant-numeric: tabular-nums;
}
.meter-track {
  position: relative;
  height: 14px;
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: 3px;
  overflow: hidden;
}
.meter-fill {
  height: 100%;
  width: 0;
  background: var(--ok);
  border-radius: 0 3px 3px 0;
  transition: width 0.45s cubic-bezier(0.2, 0.7, 0.2, 1), background-color 0.3s ease;
}
.meter-fill.is-warn { background: var(--warn); }
.meter-fill.is-over { background: var(--over); }
/* over budget: the bar is full, so the excess is shown as a hatch plus an
   arrow on the axis label — the bar itself never lies about its 0→max scale */
.meter-fill.is-clamped {
  border-radius: 0;
  background-image: repeating-linear-gradient(
    135deg, rgba(255, 255, 255, 0.45) 0 3px, transparent 3px 7px);
}
.meter-track:has(.is-clamped) { border-color: var(--over); }
.meter-track:has(.is-clamped)::after {
  content: "";
  position: absolute;
  top: 0; right: 0; bottom: 0;
  width: 5px;
  background: var(--over);
  box-shadow: -3px 0 0 var(--surface);
}
.meter-threshold {
  position: absolute;
  top: -1px; bottom: -1px;
  width: 2px;
  background: var(--ink);
  opacity: 0.55;
}
.meter-axis {
  display: flex;
  justify-content: space-between;
  margin-top: 5px;
  font-family: var(--mono);
  font-size: 10.5px;
  color: var(--ink-3);
}
.meter-axis span:nth-child(2) { flex: 0 0 auto; }
.meter-state { margin: 10px 0 0; font-size: 12.8px; color: var(--ink-2); }
.dot {
  display: inline-block;
  width: 9px; height: 9px;
  margin-right: 6px;
  vertical-align: 0;
}
.state-ok { background: var(--ok); border-radius: 50%; }
.state-warn { background: var(--warn); border-radius: 1px; transform: rotate(45deg); }
.state-over { background: var(--over); clip-path: polygon(50% 0, 100% 100%, 0 100%); }
/* the remedy is running: a fourth state, so "over budget" stops reading as ignored */
.state-working {
  background: var(--accent);
  border-radius: 50%;
  animation: fold-pulse 1.1s ease-in-out infinite;
}
@media (prefers-reduced-motion: reduce) {
  .state-working { animation: none; }
}

/* ── Ledger (the signature) ───────────────────────────────────── */

.ledger {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-height: 78px;
  padding: 8px;
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}
.ledger:empty::after {
  content: "Empty — no messages carried yet.";
  font-size: 12px;
  color: var(--ink-3);
}
.band {
  position: relative;
  min-height: 18px;
  line-height: 14px;
  border-radius: 2px;
  background: var(--accent-soft);
  border-left: 3px solid var(--accent);
  padding: 2px 8px;
  font-family: var(--mono);
  font-size: 10.5px;
  color: var(--ink-2);
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
  animation: band-in 0.3s ease-out;
}
.band.assistant { background: var(--surface); border-left-color: var(--line-strong); }
.band.summary {
  border-left-color: var(--crease);
  background:
    repeating-linear-gradient(135deg,
      transparent 0 5px,
      color-mix(in oklab, var(--crease) 16%, transparent) 5px 6px);
  color: var(--ink);
}
.band.summary::after {
  content: "";
  position: absolute;
  top: 0; right: 0;
  width: 12px; height: 12px;
  background: linear-gradient(225deg, var(--crease) 0 50%, transparent 50%);
}
@keyframes band-in {
  from { opacity: 0; transform: translateX(-6px); }
  to { opacity: 1; transform: none; }
}
@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.001s !important; transition-duration: 0.001s !important; }
}

/* ── Chat ─────────────────────────────────────────────────────── */

.chat-panel { display: flex; flex-direction: column; min-height: 620px; }
.thread {
  flex: 1;
  overflow-y: auto;
  max-height: 60vh;
  padding: 4px 4px 8px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.empty {
  margin: auto;
  max-width: 34ch;
  text-align: center;
  color: var(--ink-3);
  font-size: 13.5px;
}
.empty p { margin: 4px 0; }

.msg { display: flex; flex-direction: column; gap: 5px; max-width: 84%; }
.msg .who {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-3);
}
.msg .bubble {
  padding: 11px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface-2);
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}
.msg.user { align-self: flex-end; align-items: flex-end; }
.msg.user .bubble { background: var(--accent-soft); border-color: transparent; }
.msg.doc { max-width: 92%; }
.msg.doc .bubble { padding: 0; overflow: hidden; white-space: normal; }
.doc-text {
  font-family: var(--mono);
  font-size: 11.8px;
  line-height: 1.5;
  color: var(--ink-2);
  padding: 12px 14px;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}
.doc-text[data-mode="full"] {
  max-height: 340px;
  overflow-y: auto;
  border-bottom: 1px solid var(--line);
}
.doc-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 8px 14px;
  border-top: 1px dashed var(--line-strong);
  background: var(--surface-2);
}
.doc-count {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-3);
  cursor: help;
}
.doc-toggle {
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--ink-2);
  font-family: var(--body);
  font-size: 11.5px;
  padding: 4px 9px;
  cursor: pointer;
}
.doc-toggle:hover { color: var(--ink); border-color: var(--ink-3); }
/* stamped on the ingested-document card once its text has left the history */
.doc-folded {
  font-family: var(--mono);
  font-size: 10.5px;
  padding: 1px 6px;
  border: 1px solid var(--crease);
  border-radius: 999px;
  color: var(--crease);
  cursor: help;
}
.msg .cursor { display: inline-block; width: 7px; background: var(--ink-3); animation: blink 1s steps(2) infinite; }
@keyframes blink { 50% { opacity: 0; } }

/* compaction event card */
.event {
  align-self: stretch;
  max-width: none;
  border: 1px solid var(--crease);
  border-radius: var(--radius);
  background: color-mix(in oklab, var(--crease) 8%, var(--surface));
  padding: 13px 15px;
}
.event-h {
  margin: 0 0 8px;
  font-family: var(--display);
  font-size: 0.95rem;
  font-weight: 600;
}
.event-figures {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  font-family: var(--mono);
  font-size: 12px;
  font-variant-numeric: tabular-nums;
}
.event-figures div { display: flex; flex-direction: column; gap: 2px; }
.event-figures .k { font-family: var(--body); font-size: 10.5px; letter-spacing: 0.07em; text-transform: uppercase; color: var(--ink-3); }
.event-note { margin: 10px 0 0; font-size: 12.4px; color: var(--ink-2); }

/* before → after bar pair inside the event card */
.ba { margin-top: 12px; display: grid; gap: 6px; }
.ba-row { display: grid; grid-template-columns: 52px 1fr 72px; align-items: center; gap: 8px; font-family: var(--mono); font-size: 10.5px; color: var(--ink-3); }
.ba-bar { height: 8px; background: var(--surface-2); border: 1px solid var(--line); border-radius: 2px; overflow: hidden; }
.ba-bar > span { display: block; height: 100%; background: var(--ink-3); }
.ba-row.after .ba-bar > span { background: var(--crease); }
.ba-val { text-align: right; color: var(--ink); font-variant-numeric: tabular-nums; }

/* ── Hierarchical fold card ───────────────────────────────────────
   One card per fold, one group per pass, one row per section. Rows carry a
   shape-differentiated marker AND a text state, so progress never depends on
   colour alone. ──────────────────────────────────────────────────── */

.fold-levels { display: grid; gap: 12px; margin-top: 12px; }
.fold-level-h {
  display: block;
  margin-bottom: 6px;
  font-family: var(--body);
  font-size: 10.5px;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--ink-3);
}
.fold-steps { margin: 0; padding: 0; list-style: none; display: grid; gap: 3px; }
.fold-steps li {
  display: grid;
  grid-template-columns: 14px 1fr auto;
  align-items: center;
  gap: 8px;
  padding: 3px 8px;
  border-radius: 2px;
  background: var(--surface-2);
  border-left: 3px solid var(--line-strong);
  font-family: var(--mono);
  font-size: 11px;
  font-variant-numeric: tabular-nums;
  color: var(--ink-3);
}
.fold-steps .mark { width: 9px; height: 9px; justify-self: center; background: var(--line-strong); }
.fold-steps .val { color: var(--ink-2); }

.fold-steps li[data-state="working"] {
  border-left-color: var(--accent);
  background: var(--accent-soft);
  color: var(--ink);
}
.fold-steps li[data-state="working"] .mark {
  background: var(--accent);
  border-radius: 50%;
  animation: fold-pulse 1.1s ease-in-out infinite;
}
.fold-steps li[data-state="done"] {
  border-left-color: var(--crease);
  color: var(--ink-2);
}
.fold-steps li[data-state="done"] .mark {
  background: var(--crease);
  clip-path: polygon(0 0, 100% 0, 100% 100%);
}
.fold-steps li[data-state="failed"] { border-left-color: var(--over); color: var(--over); }
.fold-steps li[data-state="failed"] .mark { background: var(--over); clip-path: polygon(50% 0, 100% 100%, 0 100%); }
@keyframes fold-pulse { 50% { opacity: 0.35; } }
@media (prefers-reduced-motion: reduce) {
  .fold-steps li[data-state="working"] .mark { animation: none; }
}

/* the reduce is one call over the section summaries: a diamond, not a triangle */
.fold-steps li.is-reduce { border-left-color: var(--crease); }
.fold-steps li.is-reduce .mark { clip-path: polygon(50% 0, 100% 50%, 50% 100%, 0 50%); border-radius: 0; }
.fold-steps li.is-reduce[data-state="done"] .mark { background: var(--crease); }

/* inline peek at what a section summary actually says; the panel has the rest */
.sum-peek {
  grid-column: 2 / -1;
  justify-self: stretch;
  min-width: 0;
  max-width: 100%;
  margin: 0 0 1px;
  padding: 0;
  border: 0;
  border-bottom: 1px dashed var(--line-strong);
  background: none;
  font-family: var(--body);
  font-size: 11.5px;
  line-height: 1.5;
  text-align: left;
  color: var(--ink-3);
  cursor: help;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.sum-peek:hover, .sum-peek:focus-visible { color: var(--ink-2); border-bottom-color: var(--ink-3); }

.fold-live {
  margin: 10px 0 0;
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--ink-2);
}
.fold-live:empty { display: none; }

.fold-timing {
  margin: 10px 0 0;
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--ink-2);
  cursor: help;
  border-bottom: 1px dashed var(--line-strong);
  display: inline-block;
}

/* ── Dig deeper ────────────────────────────────────────────────────
   A finished section row can be reopened three ways, so it grows a strip of
   quiet controls and, on demand, one inline field. Everything sits inside the
   row's own grid, in the columns the summary peek already uses, so a row that
   can be dug into does not look like a different kind of row. ────── */

.fold-steps li[data-dig="1"] { padding-bottom: 6px; }
.dig-tools {
  grid-column: 2 / -1;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 2px;
}
.dig-btn {
  padding: 2px 8px;
  border: 1px dashed var(--line-strong);
  border-radius: 999px;
  background: transparent;
  color: var(--ink-3);
  font-family: var(--body);
  font-size: 11px;
  cursor: pointer;
}
.dig-btn:hover:not(:disabled), .dig-btn:focus-visible {
  color: var(--accent);
  border-color: var(--accent);
  border-style: solid;
}

.dig-form {
  grid-column: 2 / -1;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 6px;
  margin-top: 6px;
}
/* the rebuild has nothing to type: the button is the whole form */
.dig-form.is-bare { grid-template-columns: auto; justify-content: start; }
.dig-form input {
  padding: 6px 9px;
  font-size: 12.5px;
  min-width: 0;
}
.dig-form .dig-go {
  padding: 6px 12px;
  font-size: 12px;
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
@media (prefers-color-scheme: dark) { .dig-form .dig-go { color: #12122a; } }
.dig-hint {
  grid-column: 1 / -1;
  margin: 0;
  font-family: var(--body);
  font-size: 11px;
  line-height: 1.45;
  color: var(--ink-3);
}

/* a row whose summary was replaced, and the digest that has not caught up */
.refocused, .stale-hint {
  margin-left: 7px;
  padding: 1px 6px;
  border-radius: 999px;
  font-family: var(--mono);
  font-size: 10px;
  white-space: nowrap;
  cursor: help;
}
.refocused { border: 1px solid var(--accent); color: var(--accent); }
.stale-hint { border: 1px dashed var(--warn); color: var(--warn); }

/* the small label on a turn whose context was not the ordinary one */
.turn-chip {
  /* the bubble column stretches its children; a chip is label-sized, not
     column-sized, so it opts out on whichever side its speaker sits */
  align-self: flex-start;
  padding: 1px 7px;
  border: 1px solid var(--crease);
  border-radius: 999px;
  font-family: var(--mono);
  font-size: 10px;
  color: var(--crease);
  cursor: help;
  white-space: nowrap;
}
.msg.user .turn-chip { align-self: flex-end; }
.turn-note {
  margin: 6px 0 0;
  font-size: 11.5px;
  line-height: 1.5;
  color: var(--ink-3);
}

/* the agent-driven unfold: the accent colour, because the model drove it */
.msg.event.unfold {
  border-color: var(--accent);
  background: color-mix(in oklab, var(--accent) 7%, var(--surface));
}
.msg.event.unfold.is-capped {
  border-color: var(--warn);
  background: color-mix(in oklab, var(--warn) 7%, var(--surface));
}
.uf-steps { margin-top: 10px; }

/* an answer big enough to sit in the protected tail: a caution, not a failure */
.msg.event.large-answer {
  border-color: var(--warn);
  background: color-mix(in oklab, var(--warn) 7%, var(--surface));
}
.msg.event.large-answer .event-h { color: var(--warn); }
/* no dashed rule under this one: the other event headings carry their tooltips
   without one, and a dashed line across a full-width heading reads as an error */
.msg.event.large-answer .event-h { cursor: help; }

/* a fold-card change, recorded in the thread rather than only in the card */
.msg.fold-note {
  align-self: stretch;
  max-width: none;
  padding: 7px 11px;
  border-left: 3px solid var(--crease);
  background: var(--surface-2);
  font-size: 12px;
  line-height: 1.5;
  color: var(--ink-2);
}

/* ── Error card — human sentence here, raw payload in the wire log ── */

.msg.error {
  align-self: stretch;
  max-width: none;
  border: 1px solid var(--over);
  border-radius: var(--radius);
  background: color-mix(in oklab, var(--over) 7%, var(--surface));
  padding: 13px 15px;
}
.error-h {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 6px;
  font-family: var(--display);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--over);
}
.error-h .mark {
  flex: none;
  width: 11px; height: 11px;
  background: var(--over);
  clip-path: polygon(50% 0, 100% 100%, 0 100%);
}
.error-body { margin: 0; font-size: 12.8px; color: var(--ink-2); }
.error-body + .error-body { margin-top: 6px; }
.error-hint { margin: 8px 0 0; font-size: 11.5px; color: var(--ink-3); }

.composer { display: flex; gap: 10px; margin-top: 14px; }
.composer input { flex: 1; }

/* ── Wire log ─────────────────────────────────────────────────── */

.wire { margin-top: 16px; border-top: 1px solid var(--line); padding-top: 12px; }
.wire summary {
  cursor: pointer;
  font-family: var(--display);
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}
.wire-count { font-family: var(--mono); font-size: 11px; font-weight: 400; text-transform: none; color: var(--ink-3); margin-left: 8px; }
.wire-list { margin: 12px 0 0; padding-left: 20px; display: grid; gap: 8px; }
.wire-list li { font-family: var(--mono); font-size: 11.5px; color: var(--ink-2); overflow-wrap: anywhere; }
.wire-list .verb { color: var(--accent); }
.wire-list .stat { color: var(--ink-3); }
.wire-list .err { color: var(--over); }
/* what this one call cost, on the same rates the strip at the top uses */
.wire-list .wire-cost {
  display: inline-block;
  margin-left: 6px;
  padding: 0 5px;
  border: 1px dashed var(--line-strong);
  border-radius: 999px;
  font-size: 10px;
  color: var(--ink-3);
  cursor: help;
}
.wire-list .wire-cost.is-free { border-style: solid; border-color: var(--ok); color: var(--ok); }
/* a client-side repair fired on this response — see unwrapContentBlocks in app.js */
.wire-list .wire-fix {
  display: inline-block;
  margin-left: 6px;
  padding: 0 5px;
  border: 1px solid var(--crease);
  border-radius: 999px;
  font-size: 10px;
  color: var(--crease);
  cursor: help;
}

/* ── Footer ───────────────────────────────────────────────────── */

.footer {
  max-width: 1240px;
  margin: 34px auto 0;
  padding: 26px 28px 44px;
  border-top: 1px solid var(--line);
}
.footer-lede { margin: 0 0 12px; font-family: var(--display); font-weight: 600; }
.footer-links { margin: 0; padding: 0; list-style: none; display: grid; gap: 6px; font-size: 12.8px; color: var(--ink-2); overflow-wrap: anywhere; }
.event, .msg.error, .msg .bubble, .ledger .band { max-width: 100%; }
.footer-note { margin: 16px 0 0; max-width: 70ch; font-size: 12.4px; color: var(--ink-3); }

/* ── Tooltip ──────────────────────────────────────────────────── */

.tooltip {
  position: fixed;
  z-index: 40;
  max-width: 320px;
  padding: 9px 12px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--ink);
  box-shadow: 0 10px 30px -18px rgba(0, 0, 0, 0.7);
  font-size: 12.2px;
  line-height: 1.45;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.12s ease;
}
.tooltip.on { opacity: 1; }
.tooltip code { display: block; margin-top: 6px; color: var(--accent); white-space: pre-wrap; }
.tooltip .tip-body { display: block; }

/* the rich flavour holds a whole generated summary, so it scrolls — which means
   it has to accept the pointer that scrolls it */
.tooltip.is-rich {
  pointer-events: auto;
  overflow-y: auto;
  overscroll-behavior: contain;
}
.tooltip.is-rich .tip-body {
  font-family: var(--mono);
  font-size: 11.4px;
  line-height: 1.55;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  color: var(--ink-2);
}
/* a summary rendered as Markdown reads as prose, not as syntax */
.tooltip.is-rich .tip-body.md {
  font-family: var(--body);
  font-size: 12.2px;
  white-space: normal;
}
.tooltip .tip-h {
  display: block;
  margin-bottom: 6px;
  font-size: 10.5px;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--ink-3);
  position: sticky;
  top: -9px;
  padding: 9px 0 4px;
  margin-top: -9px;
  background: var(--surface);
}

/* ── Theme toggle ─────────────────────────────────────────────────
   Sits with the masthead's other affordances. Two states, each labelled for
   screen readers; the glyph alone never carries the meaning. ────────── */

.theme-toggle {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 8px 12px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: var(--surface);
  color: var(--ink-2);
  font-family: var(--body);
  font-size: 12px;
  cursor: pointer;
}
.theme-toggle:hover { color: var(--ink); border-color: var(--ink-3); }
.theme-toggle .glyph { font-size: 13px; line-height: 1; }
.masthead-tools {
  display: flex;
  align-items: center;
  gap: 10px;
  float: right;
  margin: -8px 0 0 12px;
}
/* narrow: the toggle's word is what pushes the eyebrow onto a second line, and
   the glyph plus its aria-label already say everything */
@media (max-width: 560px) {
  .theme-toggle { padding: 7px 10px; }
  .theme-toggle span:not(.glyph) {
    position: absolute; width: 1px; height: 1px;
    padding: 0; margin: -1px; overflow: hidden;
    clip: rect(0 0 0 0); white-space: nowrap;
  }
}

/* ── Markdown inside an assistant bubble ──────────────────────────
   Rendered by md.js from escaped text, so every tag here was emitted locally.
   Tight vertical rhythm: a chat bubble is not an article. ───────────── */

/* .bubble is pre-wrap for plain text; rendered markdown wants normal flow */
.md { white-space: normal; }
.md > :first-child { margin-top: 0; }
.md > :last-child { margin-bottom: 0; }
.md p { margin: 0 0 0.6em; }
.md h4, .md h5, .md h6 {
  margin: 0.9em 0 0.35em;
  font-family: var(--display);
  font-weight: 600;
  line-height: 1.25;
}
.md h4 { font-size: 1.02em; }
.md h5 { font-size: 0.96em; }
.md h6 { font-size: 0.92em; color: var(--ink-2); }
.md ul, .md ol { margin: 0 0 0.6em; padding-left: 1.35em; }
.md li { margin: 0.12em 0; }
.md li > ul, .md li > ol { margin: 0.12em 0 0.2em; }
.md strong { font-weight: 600; color: var(--ink); }
.md em { font-style: italic; }
.md del { opacity: 0.7; }
.md code {
  padding: 1px 4px;
  border-radius: 3px;
  background: var(--surface-2);
  border: 1px solid var(--line);
}
.md pre {
  margin: 0 0 0.6em;
  padding: 9px 11px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface-2);
  overflow-x: auto;
}
.md pre code { padding: 0; border: 0; background: none; }
.md blockquote {
  margin: 0 0 0.6em;
  padding: 2px 0 2px 11px;
  border-left: 3px solid var(--line-strong);
  color: var(--ink-2);
}
.md hr { margin: 0.8em 0; border: 0; border-top: 1px solid var(--line); }
.md a { overflow-wrap: anywhere; }

/* the headline model's badge, and the honesty marker on an unpublished window */
.model-badge {
  display: inline-block;
  padding: 1px 6px;
  border: 1px solid var(--crease);
  border-radius: 999px;
  color: var(--crease);
  font-size: 10px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  cursor: help;
}
.unverified {
  color: var(--warn);
  border-bottom: 1px dashed var(--warn);
  cursor: help;
}
/* same dashed affordance as .unverified, but in the body ink rather than warn:
   the number is sourced, so it invites a look without asking for caution */
.measured {
  border-bottom: 1px dashed var(--crease);
  cursor: help;
}

/* the docs link on a wire-log row and in the footer */
.doc-link {
  font-family: var(--mono);
  font-size: 10.5px;
  margin-left: 6px;
  white-space: nowrap;
}