/* IBM Plex, OFL-1.1 (fonts/OFL.txt), self-hosted so the page works offline. */
@font-face { font-family: "IBM Plex Sans"; src: url(fonts/IBMPlexSans-Regular.woff2) format("woff2"); font-weight: 400; font-display: block; }
@font-face { font-family: "IBM Plex Sans"; src: url(fonts/IBMPlexSans-SemiBold.woff2) format("woff2"); font-weight: 600; font-display: block; }
@font-face { font-family: "IBM Plex Mono"; src: url(fonts/IBMPlexMono-Regular.woff2) format("woff2"); font-weight: 400; font-display: block; }
@font-face { font-family: "IBM Plex Mono"; src: url(fonts/IBMPlexMono-SemiBold.woff2) format("woff2"); font-weight: 600; font-display: block; }

/* Tokens: docs/DESIGN.md §4. Radix Colors 3.0.0 (MIT) sand + brown, logo tan. */
:root {
  --bg: #fdfdfc;
  --panel: #f9f9f8;
  --panel-2: #f1f0ef;
  --line: #dad9d6;
  --line-strong: #bcbbb5;
  --ink: #21201c;
  --ink-2: #63635e;
  --brume: #cbb698;
  --accent: #815e46;
  --accent-soft: #f6eee7;
  --ok: #2a7e3b;
  --warn: #ffc53d;
  --warn-soft: #fff7c2;
  --bad: #d13415;

  --sans: "IBM Plex Sans", ui-sans-serif, system-ui, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, "SF Mono", Menlo, monospace;
  --ease: cubic-bezier(0.23, 1, 0.32, 1);
  --ease-exit: cubic-bezier(0.4, 0, 1, 1);
  --dur-out: 90ms; --dur-in: 120ms; --dur-press: 160ms; --dur-state: 240ms; --dur-flash: 300ms;
  color-scheme: light;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  height: 100dvh;
  display: grid;
  grid-template:
    "bar bar" 44px
    "band band" auto
    "list detail" 1fr
    "foot foot" auto / 340px 1fr;
  background: var(--bg);
  color: var(--ink);
  font: 400 16px/1.5 var(--sans);
}

.mono { font-family: var(--mono); font-variant-numeric: tabular-nums; }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* Top bar */
.bar {
  grid-area: bar;
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 0 16px;
  border-bottom: 1px solid var(--line);
}
.brand {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--ink);
  font-weight: 600;
  font-size: 18px;
  text-decoration: none;
}
.brand img { border-radius: 6px; object-fit: cover; background: var(--brume); }
.badge { font-size: 14px; color: var(--ink-2); margin-left: auto; }
.btn {
  font: inherit;
  font-size: 14px;
  padding: 4px 12px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--bg);
  color: var(--ink);
  cursor: pointer;
}

.band {
  grid-area: band;
  padding: 8px 16px;
  background: var(--warn-soft);
  border-bottom: 1px solid var(--warn);
  font-size: 14px;
}

/* Escrow list */
.list {
  grid-area: list;
  overflow-y: auto;
  background: var(--panel);
  border-right: 1px solid var(--line);
  padding: 16px 8px;
}
.group { margin: 0 8px; font-size: 14px; font-weight: 600; }
.group ~ .group { margin-top: 20px; }
.meta { margin: 0 8px 12px; font-size: 14px; color: var(--ink-2); }
.row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  height: 40px;
  padding: 0 8px;
  border-radius: 6px;
  color: var(--ink);
  text-decoration: none;
  font-size: 14px;
}
.row[aria-current] { background: var(--accent-soft); box-shadow: inset 2px 0 var(--accent); }

/* State chip: icon + label (Primer StateLabel pattern), glyph shape carries the state */
.chip { display: inline-flex; align-items: center; gap: 6px; font-size: 14px; white-space: nowrap; }
.glyph { width: 12px; height: 12px; flex: none; border-radius: 50%; border: 1.5px solid var(--ink); }
.state-ResultSubmitted .glyph { background: conic-gradient(var(--ink) 0 50%, transparent 0); }
.state-RefundRequested .glyph { background: radial-gradient(var(--ink) 0 2px, transparent 2.5px); }
.state-Disputed .glyph { background: var(--ink); }
.state-null .glyph { border-style: dashed; border-color: var(--ink-2); }
.net { color: var(--ink-2); }

/* Detail */
.detail { grid-area: detail; overflow-y: auto; padding: 24px 32px 32px; }
.head { display: flex; align-items: center; justify-content: space-between; gap: 12px 24px; flex-wrap: wrap; margin-bottom: 16px; }
.title { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; }
.title h1 { margin: 0; font-size: 24px; font-weight: 600; }
.copy { font-size: 14px; padding: 2px 8px; }
.copy-face { display: inline-grid; }
.copy-face > * { grid-area: 1 / 1; display: inline-flex; align-items: center; gap: 6px; }
.copy-face > *::before { content: ""; width: 12px; height: 12px; background: currentColor; -webkit-mask: var(--icon) center / contain no-repeat; mask: var(--icon) center / contain no-repeat; }
.copy .idle { --icon: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='none' stroke='%23000' stroke-width='1.5'%3E%3Crect x='5.5' y='5.5' width='8.5' height='8.5' rx='1.5'/%3E%3Cpath d='M10.5 4V3A1.5 1.5 0 0 0 9 1.5H3.5A1.5 1.5 0 0 0 2 3v5.5A1.5 1.5 0 0 0 3.5 10H4'/%3E%3C/svg%3E"); }
.copy .done { --icon: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='none' stroke='%23000' stroke-width='1.75' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M3 8.5l3.2 3.2L13 4.8'/%3E%3C/svg%3E"); }
/* Both faces share one grid cell, so the width never changes; the hidden face is out of the accessible name. Revert is instant. */
.copy .done, .copy[data-copied] .idle { visibility: hidden; }
.copy[data-copied] .done { visibility: visible; }
.copy[data-copied="in"] .done { animation: brume-fade var(--dur-in) var(--ease) both; }
.clocks { display: flex; flex-wrap: wrap; gap: 8px 32px; margin: 0 0 8px; font-size: 14px; }
.clocks div { display: grid; }
.clocks dt { color: var(--ink-2); }
.clocks dd { margin: 0; }
.datum { margin-bottom: 20px; }
.datum summary { cursor: pointer; font-size: 14px; color: var(--ink-2); width: fit-content; }
.datum dl { display: grid; grid-template-columns: max-content 1fr; gap: 4px 24px; margin: 8px 0 0; font-size: 14px; }
.datum dt { color: var(--ink-2); }
.datum dd { margin: 0; overflow-wrap: anywhere; }

/* Reachability grid */
.grid { border-collapse: separate; border-spacing: 6px 4px; margin: 0 -6px; }
.grid caption { text-align: left; padding: 0 6px 6px; font-size: 18px; font-weight: 600; }
.grid caption small { display: block; font-size: 14px; font-weight: 400; color: var(--ink-2); }
.grid th { font-size: 14px; font-weight: 600; text-align: left; padding: 0 6px; }
.grid tbody th { font-weight: 400; white-space: nowrap; padding-right: 16px; }
.idx { display: inline-block; width: 1.5em; color: var(--ink-2); }
.cell {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 200px;
  height: 40px;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: var(--panel);
  color: var(--ink-2);
  font: inherit;
  font-size: 14px;
  text-align: left;
  cursor: pointer;
}
.cell .glyph { border-radius: 2px; border-color: var(--ink-2); }
.cell.can { background: var(--brume); border-color: var(--ink); color: var(--ink); font-weight: 600; }
.cell.can .glyph { background: var(--ink); border-color: var(--ink); }
.cell.skel { background: var(--panel-2); border-color: var(--panel-2); animation: none; cursor: default; }
@keyframes resolve { from { opacity: 0; transform: translateY(2px); } }
.animate .cell { animation: resolve 120ms var(--ease) both; animation-delay: calc(var(--i) * 14ms); }
@media (prefers-reduced-motion: reduce) { .animate .cell { animation: none; } }
/* backwards holds the from-state during the stagger delay only, so the 21 finished cells leave getAnimations(). */
.animate .cell { animation-fill-mode: backwards; }
/* Content replacing the painted boot skeleton fades in once, at its final geometry; the grid keeps its own stagger. No fill, so nothing lingers in getAnimations(). */
@media (prefers-reduced-motion: no-preference) { .fade-in > :not(.grid) { animation: brume-fade var(--dur-in) var(--ease); } }

/* Cell detail popover */
.pop {
  position: fixed;
  inset: auto;
  margin: 0;
  width: 340px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--bg);
  color: var(--ink);
  box-shadow: 0 4px 16px rgb(33 32 28 / .12);
  font-size: 14px;
}
.pop h3 { margin: 0 0 4px; font-size: 16px; }
.pop p { margin: 0 0 12px; }
.pop h4 { margin: 12px 0 4px; font-size: 14px; color: var(--ink-2); font-weight: 400; }
.pop ul { margin: 0; padding-left: 18px; }

.btn.primary { background: var(--accent); border-color: var(--accent); color: #fefdfc; font-weight: 600; }
.btn:disabled { opacity: .5; cursor: not-allowed; }
.hint { font-size: 14px; color: var(--ink-2); }
.col-note { display: block; font-weight: 400; }
.error { margin: 8px 0 0; color: var(--ink); font-size: 14px; }
.error::before { content: "!"; display: inline-grid; place-items: center; width: 16px; height: 16px; margin-right: 6px; border-radius: 50%; background: var(--bad); color: #fff; font-weight: 600; font-size: 12px; }

/* View switch (Primer SegmentedControl pattern) */
.seg { display: inline-flex; width: fit-content; padding: 2px; border-radius: 6px; background: var(--panel-2); }
.seg a { padding: 4px 16px; border-radius: 4px; color: var(--ink-2); font-size: 14px; text-decoration: none; }
.seg a[aria-current] { background: var(--bg); color: var(--ink); font-weight: 600; box-shadow: 0 0 0 1px var(--line); }

/* Settle steps: Carbon progress-indicator glyphs, GOV.UK task-list status at the row end */
.steps { list-style: none; margin: 0; padding: 0; max-width: 820px; }
.step { position: relative; display: grid; grid-template-columns: 16px 1fr; gap: 16px; padding: 10px 16px; border-radius: 6px; }
.step:not(:last-child)::before { content: ""; position: absolute; left: 23px; top: 32px; bottom: -6px; width: 1.5px; background: var(--line-strong); }
.step.done::before { background: var(--ink); }
.step-head { display: flex; justify-content: space-between; gap: 16px; }
.step-label { font-weight: 600; }
.step.later .step-label, .step.later .status { color: var(--ink-2); font-weight: 400; }
.step .status { font-size: 14px; white-space: nowrap; }
.step.current { background: var(--brume); }
.step.current .status { font-weight: 600; }
.step-body p { margin: 2px 0 0; font-size: 14px; }
.mark { position: relative; width: 16px; height: 16px; margin-top: 4px; border-radius: 50%; border: 1.5px solid var(--ink-2); background: var(--bg); }
.done .mark { border-color: var(--ink); }
.done .mark::after { content: ""; position: absolute; left: 4.5px; top: 1.5px; width: 3.5px; height: 7px; border: solid var(--ink); border-width: 0 1.5px 1.5px 0; transform: rotate(45deg); }
.current .mark { border-color: var(--ink); background: conic-gradient(var(--ink) 0 50%, var(--bg) 0); }
.error .mark { border-color: var(--bad); background: var(--bad); }
.error .mark::after { content: "!"; position: absolute; inset: 0; display: grid; place-items: center; color: #fff; font-size: 11px; font-weight: 600; }
/* A hole (provider down, nothing sent) is not a refusal: warn mark, ink glyph */
.step.hole .mark { border-color: var(--warn); background: var(--warn); }
.step.hole .mark::after { color: var(--ink); }
.hole-note { margin: 8px 0 0; color: var(--ink); font-size: 14px; }
.hole-note .btn { margin-left: 8px; }
.hash a, .log a, .alert a { color: var(--accent); }
.lock { color: var(--ink-2); }
.cmd { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 12px; margin-top: 8px; }
.cmd code { padding: 4px 8px; border-radius: 4px; background: var(--bg); border: 1px solid var(--ink); font-size: 14px; }
.propose { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 12px; margin-top: 8px; }
.propose label { display: flex; align-items: center; gap: 8px; font-size: 14px; }
.propose .band-hint { flex-basis: 100%; margin: 0; color: var(--ink); }
.try { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 12px; margin-top: 16px; padding-top: 12px; border-top: 1px solid var(--line); }
.try-out { flex-basis: 100%; }
.try-out p { margin: 0; }
/* The node's answer arrives once per send (the node is built then), so no tracking: one beat, same for phase 1 and 2, no tint. */
.try-out .observed { animation: resolve var(--dur-in) var(--ease); }
.matched::before { content: ""; display: inline-block; width: 4px; height: 8px; margin: 0 9px 2px 5px; border: solid var(--ok); border-width: 0 2px 2px 0; transform: rotate(45deg); }
.share { width: 6em; padding: 4px 8px; font: inherit; font-family: var(--mono); border: 1px solid var(--line-strong); border-radius: 6px; background: var(--bg); }

/* Balances (Carbon data-table pattern) */
.balances { width: 100%; margin-top: 8px; border-collapse: collapse; font-size: 14px; }
.balances th, .balances td { padding: 6px 8px; text-align: left; border-bottom: 1px solid var(--line); }
.balances thead th { font-weight: 600; border-bottom-color: var(--line-strong); }
.balances .num { text-align: right; white-space: nowrap; }
.balances-wrap { overflow-x: auto; }

/* Transactions (Primer Timeline pattern, condensed) */
.log { margin-top: 32px; max-width: 820px; }
.log h2 { margin: 0 0 8px; font-size: 18px; }
.timeline { list-style: none; margin: 0; padding: 0; }
.timeline li { display: grid; grid-template-columns: 16px 1fr auto auto; align-items: center; gap: 16px; padding: 8px 16px; border-bottom: 1px solid var(--line); font-size: 14px; }
.timeline .status { color: var(--ink-2); }
.timeline li.accepted .mark { border-color: var(--ok); }
.timeline li.accepted .mark::after { content: ""; position: absolute; left: 4.5px; top: 1.5px; width: 3.5px; height: 7px; border: solid var(--ok); border-width: 0 1.5px 1.5px 0; transform: rotate(45deg); }
.timeline li.refused .mark { border-color: var(--bad); background: var(--bad); }
.timeline li.refused .mark::after { content: "!"; position: absolute; inset: 0; display: grid; place-items: center; color: #fff; font-size: 11px; font-weight: 600; }
.timeline li.hole .mark { border-color: var(--warn); background: var(--warn); } /* not sent: a hole, not a refusal */
.timeline .mark { margin-top: 0; }

/* Solver: range bars on one shared 0-100% axis (dataviz: thin marks, 4px rounded ends, recessive axis, direct labels) */
.bands, .paths { max-width: 820px; }
.bands h2, .paths h2 { margin: 0; font-size: 18px; }
.bands > .hint { margin: 2px 0 16px; }
.keys-note { margin: 0 0 16px; max-width: 72ch; }
.witnesses { margin-top: 24px; }
.witnesses .signers { grid-column: 2 / -1; color: var(--ink-2); }
.band-grid { display: grid; grid-template-columns: max-content 1fr 9em; align-items: center; gap: 8px 20px; }
.band-label { font-size: 14px; }
.track { position: relative; height: 12px; border-radius: 4px; background: var(--panel-2); }
.range { position: absolute; top: 0; bottom: 0; min-width: 4px; border-radius: 4px; background: var(--brume); box-shadow: inset 0 0 0 1px var(--ink); }
.band-value { font-size: 14px; }
.axis { position: relative; height: 20px; font-size: 14px; color: var(--ink-2); }
.axis span { position: absolute; transform: translateX(-50%); }
.axis span:first-child { transform: none; }
.axis span:last-child { transform: translateX(-100%); }
.paths { margin-top: 24px; }
.paths table { width: 100%; margin-top: 8px; border-collapse: collapse; font-size: 14px; }
.paths th, .paths td { padding: 8px 12px; text-align: left; vertical-align: top; border-bottom: 1px solid var(--line); }
.paths thead th { font-weight: 600; border-bottom-color: var(--line-strong); }
.paths tbody th { font-weight: 400; color: var(--ink-2); width: 34%; }
.wait tbody th { width: 20%; }
.wait tr.off th, .wait tr.off td { color: var(--ink-2); opacity: .55; }
.wait > .hint { margin: 4px 0 0; }
.alert { margin: 8px 0 0; padding: 8px 12px; border: 1px solid var(--bad); border-radius: 4px; font-size: 14px; }
.alert ul { margin: 4px 0 0; padding-left: 20px; }

/* Empty and error states (Primer Blankslate pattern) */
.blank { max-width: 56ch; padding: 48px 0; }
.blank h2 { margin: 0 0 8px; font-size: 18px; }
.blank p { margin: 0 0 16px; color: var(--ink-2); }

/* Provenance footer (OWID pattern) */
.foot {
  grid-area: foot;
  display: flex;
  flex-wrap: wrap;
  gap: 4px 24px;
  padding: 8px 16px;
  border-top: 1px solid var(--line);
  font-size: 14px;
  color: var(--ink-2);
}
.foot .warn::before, .meta.warn::before, .hole-note::before { content: ""; display: inline-block; width: 8px; height: 8px; margin-right: 6px; border-radius: 50%; background: var(--warn); }

@media (max-width: 900px) {
  /* The asked escrow comes first; the list follows it */
  body { height: auto; grid-template: "bar" 44px "band" auto "detail" auto "list" auto "foot" auto / 1fr; }
  .list { border-right: 0; border-bottom: 1px solid var(--line); }
  .detail { padding: 16px; overflow-x: auto; }
}

/* Press feedback and hover, Emil Kowalski's rules: transform only, ease-out, hover only on fine pointers */
.btn, .cell { transition: transform 160ms var(--ease); }
.btn:active:not(:disabled), .cell:active { transform: scale(0.97); }
@media (hover: hover) and (pointer: fine) {
  .btn:hover { background: var(--panel-2); }
  .btn.primary:hover { background: #6f503b; }
  .row:hover { background: var(--panel-2); }
  .cell:hover { border-color: var(--line-strong); }
  .cell.can:hover { border-color: var(--ink); }
}
@media (prefers-reduced-motion: reduce) { .btn:active:not(:disabled), .cell:active { transform: none; } }

/* Popover grows out of its cell (transform-origin set in JS); exits instantly */
.pop:popover-open {
  opacity: 1;
  transform: none;
  transition: opacity 150ms var(--ease), transform 150ms var(--ease);
  @starting-style { opacity: 0; transform: scale(0.97); }
}
@media (prefers-reduced-motion: reduce) { .pop:popover-open { transition: opacity 150ms ease; } }

/* Phone: platform baseline (mobile-native skill) */
html { -webkit-tap-highlight-color: transparent; -webkit-text-size-adjust: 100%; }
button, a { touch-action: manipulation; }
.btn, .cell, .seg a { user-select: none; -webkit-user-select: none; }
.cell-text { min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

@media (max-width: 900px) {
  /* Grid: three columns share the width; long redeemer names wrap instead of pushing the table off screen */
  .grid { width: 100%; table-layout: fixed; border-spacing: 4px; margin: 0 -4px; }
  .grid thead td { width: 38%; }
  .grid tbody th { white-space: normal; padding-right: 4px; font-size: 14px; }
  .cell { width: 100%; padding: 0 8px; gap: 6px; }
  /* Solver bands: label on its own line, then the bar and its value; the axis sits under the bars */
  .band-grid { grid-template-columns: 1fr auto; gap: 4px 12px; }
  .band-label { grid-column: 1 / -1; margin-top: 8px; }
  .band-grid > span:empty { display: none; }
  /* Transactions: hash and status drop under the step name */
  .timeline li { grid-template-columns: 16px 1fr; gap: 2px 12px; }
  .timeline li > :nth-child(n + 3) { grid-column: 2; }
  .cmd code { overflow-wrap: anywhere; }
  /* Balances: tighter cells so Matches stays on screen at 375 px */
  .balances th, .balances td { padding: 6px 4px; }
  .step-body { min-width: 0; } /* a wide table scrolls inside its wrapper, never the page */
  .balances thead th.num { white-space: normal; }
}

.tnum { font-variant-numeric: tabular-nums; }
.front-run { margin: 8px 0 0; }
.balances .match { white-space: nowrap; }
.balances .match::before { content: ""; display: inline-block; width: 8px; height: 8px; margin-right: 6px; border-radius: 50%; }
.balances .match.ok::before { background: var(--ok); }
.balances .match.off { font-weight: 600; }
.balances .match.off::before { background: var(--bad); }
.band-none { grid-column: span 2; font-size: 14px; color: var(--ink-2); }
/* Settle step cues: data-motion is set by brumeMotion (app.js) for the render that sees a step change, removed on animationend.
   The tan of .step.current is the row's own background, so it is not animated. A done step's mark is ink (neutral): no flash. */
.step[data-motion] .mark, .step[data-motion] .status, .step[data-motion="await-in"] .cmd { animation: resolve var(--dur-in) var(--ease) both; }
.step[data-motion="refused"], .step[data-motion="expired"] { isolation: isolate; --flash-color: var(--bad); --flash-from: .12; }
.step[data-motion="refused"]::after, .step[data-motion="expired"]::after { content: ""; position: absolute; inset: 0; border-radius: inherit; pointer-events: none; z-index: -1; background: var(--flash-color); animation: brume-flash var(--dur-flash) var(--ease-exit) both; }
@keyframes brume-flash { from { opacity: var(--flash-from); } to { opacity: 0; } }
@media (prefers-reduced-motion: reduce) { @keyframes resolve { from { opacity: 0; } } }
/* Settle values: data-motion is set by cueValue (app.js). Inline-block so resolve's translate applies to a span. */
span[data-cue] { display: inline-block; }
[data-cue][data-motion="in"] { animation: resolve var(--dur-in) var(--ease) both; }
[data-cue][data-motion="swap"] { animation: brume-fade var(--dur-in) var(--ease) both; }
@keyframes brume-fade { from { opacity: 0; } }

.timeline li.pending .mark { border-color: var(--ink); background: conic-gradient(var(--ink) 0 50%, var(--bg) 0); }
.tag { display: inline-block; margin-left: 4px; padding: 0 6px; border: 1px solid var(--line-strong); border-radius: 4px; font-size: 14px; color: var(--ink-2); white-space: nowrap; }
/* The node's raw answer, one click away from the sentence */
.raw { margin-top: 4px; font-size: 14px; }
.raw summary { cursor: pointer; color: var(--ink-2); width: fit-content; }
.raw pre { margin: 4px 0 0; padding: 8px; max-width: 100%; overflow-x: auto; border: 1px solid var(--line); border-radius: 4px; background: var(--panel); font-size: 14px; white-space: pre-wrap; overflow-wrap: anywhere; }
.timeline .raw { grid-column: 2 / -1; margin-top: 0; }