:root {
  --doppler: #C73E3E;
  --doe: #2B6CB0;
  --doe-validate: #6B46C1;
  --cerebras: #E55A1F;

  --ink: #0F172A;
  --body: #334155;
  --muted: #64748B;
  --line: #E2E8F0;
  --hairline: #EEF2F7;
  --bg: #FAFAFA;
  --surface: #FFFFFF;

  --red-wash: rgba(199, 62, 62, 0.035);
  --blue-wash: rgba(43, 108, 176, 0.035);
  --purple-wash: rgba(107, 70, 193, 0.04);
  --orange-wash: rgba(229, 90, 31, 0.035);

  --red-edge: rgba(199, 62, 62, 0.42);
  --blue-edge: rgba(43, 108, 176, 0.42);
  --purple-edge: rgba(107, 70, 193, 0.42);
  --orange-edge: rgba(229, 90, 31, 0.42);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--body);
  font-family: 'IBM Plex Sans', -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--ink); text-decoration: none; border-bottom: 1px dotted var(--line); }
a:hover { border-bottom-color: var(--ink); }

h1, h2, h3 {
  font-family: 'Space Grotesk', system-ui, sans-serif;
  color: var(--ink);
  font-weight: 600;
  letter-spacing: -0.02em;
}
h1 { margin: 0; font-size: clamp(1.7rem, 3.4vw, 2.4rem); line-height: 1.1; letter-spacing: -0.03em; }
h2 { margin: 0; font-size: 1.05rem; line-height: 1.25; }
h3 { margin: 0; font-size: 0.86rem; font-weight: 600; }

code, pre, .mono {
  font-family: 'JetBrains Mono', 'SF Mono', Menlo, Consolas, monospace;
  font-variant-numeric: tabular-nums;
}
:not(pre) > code {
  padding: 0.08rem 0.3rem;
  border-radius: 3px;
  background: var(--hairline);
  color: var(--ink);
  font-size: 0.86em;
}
pre {
  margin: 0;
  padding: 0.85rem 0.95rem;
  background: #0F172A;
  color: #E2E8F0;
  border-radius: 6px;
  font-size: 0.78rem;
  line-height: 1.55;
  overflow-x: auto;
  white-space: pre;
}

.page {
  width: min(1180px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 2.6rem 0 4rem;
}

/* HEADER ---------------------------------------------------- */

header.forge-head {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 1.5rem;
  align-items: end;
  padding-bottom: 1.4rem;
  margin-bottom: 1.8rem;
  border-bottom: 1px solid var(--line);
}
header.forge-head .crumbs {
  margin: 0 0 0.5rem;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}
header.forge-head .crumbs a {
  color: var(--muted);
  border-bottom-color: transparent;
}
header.forge-head .crumbs a:hover { color: var(--ink); border-bottom-color: var(--ink); }
header.forge-head .meta {
  text-align: right;
  font-size: 0.78rem;
  color: var(--muted);
  font-family: 'JetBrains Mono', monospace;
  line-height: 1.6;
}
header.forge-head .meta strong { color: var(--ink); font-weight: 500; }

/* PROMPT BAR ------------------------------------------------ */

.prompt-bar {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 1rem;
  align-items: center;
  padding: 1rem 1.2rem;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  margin-bottom: 1.4rem;
}
.prompt-bar .prompt-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}
.prompt-bar .prompt-text {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.92rem;
  color: var(--ink);
  background: var(--hairline);
  padding: 0.45rem 0.7rem;
  border-radius: 4px;
}
.prompt-bar .prompt-token {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.78rem;
  color: var(--muted);
}

/* LANES ----------------------------------------------------- */

.lanes {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.1rem;
}

.lane {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 1.1rem 1.2rem 1rem;
  display: flex;
  flex-direction: column;
  min-height: 320px;
}
.lane.red    { border-color: var(--red-edge);    background: linear-gradient(180deg, var(--red-wash), var(--surface) 60%); }
.lane.blue   { border-color: var(--blue-edge);   background: linear-gradient(180deg, var(--blue-wash), var(--surface) 60%); }
.lane.orange { border-color: var(--orange-edge); background: linear-gradient(180deg, var(--orange-wash), var(--surface) 60%); }
.lane.purple { border-color: var(--purple-edge); background: linear-gradient(180deg, var(--purple-wash), var(--surface) 60%); }

.lane-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 0.6rem;
  margin-bottom: 0.55rem;
}
.lane-head .kicker {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.66rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
}
.lane-head .pill {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.62rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  padding: 0.18rem 0.45rem;
  border-radius: 3px;
  border: 1px solid var(--line);
  color: var(--muted);
  background: var(--surface);
  white-space: nowrap;
}
.pill.recorded { color: var(--doppler); border-color: var(--red-edge); }
.pill.live-webgpu { color: var(--doe); border-color: var(--blue-edge); }
.pill.live-cpu { color: var(--cerebras); border-color: var(--orange-edge); }
.pill.failed { color: var(--muted); border-color: var(--line); }
.pill.bound { color: var(--doe-validate); border-color: var(--purple-edge); }
.pill.computing { color: var(--muted); border-color: var(--line); animation: pulse 1.4s ease-in-out infinite; }
@keyframes pulse {
  0%, 100% { opacity: 0.55; }
  50% { opacity: 1; }
}

.lane h2 { font-size: 1.05rem; }
.lane .lane-note {
  margin: 0.3rem 0 0.85rem;
  color: var(--muted);
  font-size: 0.85rem;
}

.lane-body { flex: 1; display: flex; flex-direction: column; gap: 0.55rem; }

.kv {
  display: grid;
  grid-template-columns: 11rem 1fr;
  gap: 0.4rem 0.85rem;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.78rem;
  align-items: baseline;
}
.kv dt { color: var(--muted); }
.kv dd { margin: 0; color: var(--ink); word-break: break-all; }
.kv dd.num { font-variant-numeric: tabular-nums; }
.kv dd.hash { color: var(--doe-validate); }
.kv dd.ok { color: var(--doe); }
.kv dd.warn { color: var(--cerebras); }
.kv dd.fail { color: var(--doppler); }

.lane-foot {
  margin-top: 0.85rem;
  padding-top: 0.7rem;
  border-top: 1px dashed var(--line);
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.7rem;
  color: var(--muted);
  display: flex;
  justify-content: space-between;
  gap: 0.6rem;
}

/* CSL SOURCE TOGGLE ----------------------------------------- */

details.csl {
  margin-top: 0.4rem;
}
details.csl summary {
  cursor: pointer;
  list-style: none;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  padding: 0.35rem 0;
  border-top: 1px dashed var(--line);
}
details.csl summary::-webkit-details-marker { display: none; }
details.csl summary::after {
  content: " +";
  color: var(--muted);
}
details.csl[open] summary::after { content: " −"; }
details.csl pre { margin-top: 0.5rem; max-height: 280px; }

.csl-tabs {
  display: flex;
  gap: 0.4rem;
  margin-top: 0.5rem;
}
.csl-tab {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.7rem;
  padding: 0.25rem 0.55rem;
  border: 1px solid var(--line);
  border-radius: 3px;
  background: var(--surface);
  color: var(--muted);
  cursor: pointer;
}
.csl-tab.active { color: var(--ink); border-color: var(--ink); }
.csl-pane { display: none; }
.csl-pane.active { display: block; }

/* CHUNKS ---------------------------------------------------- */

.chunks {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.3rem;
  margin-top: 0.4rem;
}
.chunk-row {
  display: grid;
  grid-template-columns: 4.5rem 1fr 1fr 1fr 5rem;
  gap: 0.7rem;
  align-items: baseline;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.74rem;
  padding: 0.32rem 0.5rem;
  border-radius: 3px;
  background: var(--hairline);
}
.chunk-row .label { color: var(--muted); }
.chunk-row .recorded-val { color: var(--doppler); }
.chunk-row .live-val { color: var(--ink); }
.chunk-row .diff { color: var(--muted); text-align: right; }
.chunk-row.match .diff { color: var(--doe); }
.chunk-row.mismatch .diff { color: var(--doppler); }
.chunk-row.pending { opacity: 0.55; }

/* AGGREGATE BAR --------------------------------------------- */

.agg {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 0.7rem 0.9rem;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.78rem;
  margin-top: 0.6rem;
}
.agg .agg-row {
  display: grid;
  grid-template-columns: 9rem 1fr 1fr 1fr;
  gap: 0.6rem;
  padding: 0.16rem 0;
}
.agg .agg-row .label { color: var(--muted); }
.agg .agg-row .recorded-val { color: var(--doppler); }
.agg .agg-row .live-val { color: var(--ink); }
.agg .agg-row .diff { color: var(--muted); text-align: right; }
.agg .agg-row.bound .diff { color: var(--doe); }
.agg .agg-row.bound .diff::before { content: "≈ "; color: var(--muted); }

/* RECEIPT --------------------------------------------------- */

.receipt-block {
  margin-top: 0.5rem;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.74rem;
  line-height: 1.55;
}
.receipt-block .scope, .receipt-block .notwhat {
  margin: 0.4rem 0;
  padding: 0.55rem 0.7rem;
  border-radius: 3px;
  background: var(--hairline);
  color: var(--body);
  white-space: normal;
}
.receipt-block .scope strong, .receipt-block .notwhat strong {
  display: block;
  font-size: 0.66rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 0.3rem;
}

/* FOOTER ---------------------------------------------------- */

footer.forge-foot {
  margin-top: 2.5rem;
  padding-top: 1.4rem;
  border-top: 1px solid var(--line);
  font-size: 0.78rem;
  color: var(--muted);
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 1rem;
  align-items: baseline;
}
footer.forge-foot .links {
  display: flex;
  gap: 1.2rem;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.74rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

/* RESPONSIVE ------------------------------------------------ */

@media (max-width: 880px) {
  .lanes { grid-template-columns: 1fr; }
  header.forge-head { grid-template-columns: 1fr; }
  header.forge-head .meta { text-align: left; }
  .kv { grid-template-columns: 9rem 1fr; }
  .chunk-row { grid-template-columns: 3.4rem 1fr 1fr 1fr 4rem; font-size: 0.7rem; gap: 0.5rem; }
  .agg .agg-row { grid-template-columns: 8rem 1fr 1fr 1fr; font-size: 0.74rem; }
}
@media (max-width: 600px) {
  .chunk-row {
    grid-template-columns: 3rem 1fr 1fr;
    grid-template-areas:
      "label rec-act rec-w"
      "label rec-out diff";
    row-gap: 0.15rem;
  }
  .chunk-row .label { grid-area: label; }
  .chunk-row > :nth-child(2) { grid-area: rec-act; }
  .chunk-row > :nth-child(3) { grid-area: rec-w; }
  .chunk-row > :nth-child(4) { grid-area: rec-out; }
  .chunk-row > :nth-child(5) { grid-area: diff; text-align: right; }
}