:root {
  --bench-serif: "Source Serif 4", "Iowan Old Style", "Palatino Linotype", serif;
  --bench-mono: "Inconsolata", "SF Mono", "Consolas", monospace;
  --bench-sans: "DM Sans", system-ui, sans-serif;
  --bench-size: clamp(1rem, 0.94rem + 0.28vw, 1.15rem);
  --bench-baseline: 1.58;
  --bench-ink: #1c2428;
  --bench-ink-muted: #4a5c64;
  --bench-paper: #e8eef0;
  --bench-paper-warm: #dfe8ea;
  --bench-copper: #b87333;
  --bench-copper-soft: #d4a574;
  --bench-teal: #2a6b6e;
  --bench-teal-deep: #163a3d;
  --bench-rail: #3d8a8e;
  --bench-danger: #8b3a3a;
  --bench-ok: #2d6a4f;
  --bench-w: min(calc(100vw - 1.6rem), 40rem);
  --focus: #c47a2c;
}

* { box-sizing: border-box; }

html {
  background: #0a1214;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--bench-serif);
  font-size: var(--bench-size);
  line-height: var(--bench-baseline);
  color: var(--bench-ink);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

#bench-canvas {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
  opacity: 0.28;
}

.site-top {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 20;
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  padding: 0.7rem 1rem;
  pointer-events: none;
}

.home-link {
  pointer-events: auto;
  font-family: var(--bench-sans);
  font-size: 0.88rem;
  font-weight: 500;
  color: #c8dde0;
  text-decoration: none;
}

.home-link:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
}

.language-nav {
  display: flex;
  flex: 1;
  justify-content: flex-end;
  gap: 0.5rem;
  font-family: var(--bench-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  pointer-events: auto;
}

.language-link {
  color: rgba(200, 221, 224, 0.65);
  text-decoration: none;
}

.language-link[aria-current="page"] {
  color: #e8f0f2;
  box-shadow: inset 0 -1px 0 var(--bench-copper-soft);
}

.article-wrap {
  position: relative;
  z-index: 1;
  padding: 4.5rem 0.8rem 4rem;
}

.article-slab {
  width: var(--bench-w);
  margin: 0 auto 2.5rem;
  padding: 2rem 1.6rem 2.2rem;
  background: var(--bench-paper);
  border: 1px solid rgba(42, 107, 110, 0.22);
  box-shadow: 0 1px 0 rgba(255,255,255,0.06) inset, 0 12px 40px rgba(0,0,0,0.35);
}

.article-head h1 {
  font-size: clamp(1.65rem, 1.2rem + 1.8vw, 2.35rem);
  font-weight: 500;
  line-height: 1.2;
  text-align: center;
  text-wrap: balance;
  margin: 0 0 0.4rem;
  color: var(--bench-teal-deep);
}

.article-subtitle {
  font-family: var(--bench-sans);
  font-size: 0.88em;
  text-align: center;
  color: var(--bench-ink-muted);
  margin: 0 0 0.6rem;
}

.article-meta {
  font-family: var(--bench-mono);
  font-size: 0.72em;
  text-align: center;
  letter-spacing: 0.06em;
  color: var(--bench-ink-muted);
  margin: 0;
}

.article-meta.article-companion {
  margin-top: 0.45rem;
  font-size: 0.68em;
  letter-spacing: 0.04em;
  text-transform: none;
}

.article-meta.article-companion a {
  color: var(--bench-teal);
  text-decoration: none;
  border-bottom: 1px solid rgba(61, 138, 142, 0.45);
}

.article-meta.article-companion a:hover {
  color: var(--bench-copper-soft);
  border-bottom-color: var(--bench-copper-soft);
}

.page-prelude p {
  margin-top: 1.4rem;
  text-align: justify;
  hyphens: auto;
  text-wrap: pretty;
}

.section-label {
  font-family: var(--bench-mono);
  font-size: 0.68em;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--bench-copper);
  margin: 0 0 0.35rem;
}

.section-title {
  font-size: 1.22em;
  font-weight: 500;
  margin: 0 0 1rem;
  color: var(--bench-teal-deep);
  text-wrap: balance;
}

.page-body p {
  margin: 0 0 0.85rem;
  text-align: justify;
  hyphens: auto;
  text-wrap: pretty;
}

.page-body p:last-child { margin-bottom: 0; }

.meter-strip {
  font-family: var(--bench-mono);
  font-size: 0.82em;
  padding: 0.55rem 0.75rem;
  margin: 1rem 0;
  background: var(--bench-paper-warm);
  border-left: 3px solid var(--bench-copper);
  color: var(--bench-teal-deep);
  overflow-x: auto;
  white-space: nowrap;
}

.bench-viz {
  margin: 1.4rem 0;
  padding: 0.9rem;
  background: var(--bench-teal-deep);
  border-radius: 2px;
  color: #d8e8ea;
}

.bench-viz-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 0.75rem;
  margin-bottom: 0.75rem;
}

.bench-viz-head label {
  font-family: var(--bench-sans);
  font-size: 0.75em;
  font-weight: 500;
}

.pattern-select {
  font-family: var(--bench-mono);
  font-size: 0.78em;
  padding: 0.35rem 0.5rem;
  background: #0f2224;
  color: #d8e8ea;
  border: 1px solid var(--bench-rail);
  border-radius: 2px;
  cursor: pointer;
}

.pattern-select:focus-visible {
  outline: 2px solid var(--bench-copper-soft);
  outline-offset: 1px;
}

.bench-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.bench-btn {
  font-family: var(--bench-mono);
  font-size: 0.7em;
  letter-spacing: 0.04em;
  padding: 0.35rem 0.6rem;
  background: rgba(61, 138, 142, 0.35);
  color: #e8f0f2;
  border: 1px solid var(--bench-rail);
  border-radius: 2px;
  cursor: pointer;
}

.bench-btn:hover { background: rgba(61, 138, 142, 0.55); }

.bench-btn:focus-visible {
  outline: 2px solid var(--bench-copper-soft);
  outline-offset: 1px;
}

.bench-btn[aria-pressed="true"] {
  background: var(--bench-copper);
  border-color: var(--bench-copper-soft);
  color: #1a1210;
}

#bench-stage {
  position: relative;
  width: 100%;
  height: 16rem;
  background: #0c1c1e;
  border: 1px solid var(--bench-rail);
  border-radius: 2px;
  overflow: hidden;
}

.bench-metrics {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(7.5rem, 1fr));
  gap: 0.45rem;
  margin-top: 0.65rem;
}

.event-feed {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-top: 0.55rem;
  min-height: 1.6rem;
}

.event-chip {
  font-family: var(--bench-mono);
  font-size: 0.62em;
  line-height: 1.35;
  padding: 0.25rem 0.45rem;
  background: rgba(184, 115, 51, 0.22);
  border: 1px solid rgba(184, 115, 51, 0.45);
  border-radius: 2px;
  color: #f0dcc8;
}

.event-chip.muted {
  background: rgba(61, 138, 142, 0.15);
  border-color: var(--bench-rail);
  color: #9ab4b8;
}

.metric-cell {
  font-family: var(--bench-mono);
  font-size: 0.68em;
  padding: 0.4rem 0.5rem;
  background: rgba(0,0,0,0.25);
  border-left: 2px solid var(--bench-rail);
}

.metric-cell strong {
  display: block;
  font-size: 1.15em;
  color: var(--bench-copper-soft);
  margin-top: 0.15rem;
}

.metric-cell.danger strong { color: #e8a0a0; }
.metric-cell.ok strong { color: #8fd4b0; }

.stability-banner {
  margin: 0.5rem 0 0;
  padding: 0.45rem 0.65rem;
  font-family: var(--bench-mono);
  font-size: 0.72rem;
  line-height: 1.45;
  color: #f0d4a8;
  background: rgba(139, 58, 58, 0.35);
  border: 1px solid rgba(232, 160, 160, 0.35);
  border-radius: 3px;
}

.stability-banner[hidden] { display: none; }

.stability-banner.tail-banner {
  background: rgba(90, 70, 40, 0.4);
  border-color: rgba(240, 212, 168, 0.45);
  color: #e8d4b0;
}

.health-panel {
  margin-top: 0.65rem;
  padding: 0.55rem 0.65rem;
  background: rgba(15, 34, 36, 0.65);
  border: 1px solid var(--bench-rail);
  border-radius: 3px;
}

.health-panel .health-head {
  border-left-color: var(--bench-teal);
  margin-bottom: 0.45rem;
}

.health-index {
  display: inline-block;
  margin-left: 0.5rem;
  font-size: 0.95em;
  opacity: 0.85;
}

.health-lanes-wrap {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 0.35rem;
}

.health-lane {
  display: block;
  height: 0.45rem;
  background: rgba(0, 0, 0, 0.35);
  border-radius: 2px;
  overflow: hidden;
}

.health-lane i {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, var(--bench-teal), var(--bench-copper-soft));
  border-radius: 2px;
}

.health-lane-key {
  margin: 0.4rem 0 0;
  font-size: 0.62em;
  opacity: 0.75;
}

.metric-cell[data-space]::before {
  content: attr(data-space);
  display: block;
  font-family: var(--bench-mono);
  font-size: 0.58rem;
  letter-spacing: 0.06em;
  opacity: 0.55;
  margin-bottom: 0.15rem;
}

.rate-input {
  font-family: var(--bench-mono);
  font-size: 0.72em;
  width: 4.2rem;
  padding: 0.25rem 0.35rem;
  background: rgba(0,0,0,0.35);
  border: 1px solid var(--bench-rail);
  color: var(--bench-copper-soft);
  border-radius: 2px;
}

.rate-input.wide { width: 5.5rem; }

.scenario-strip {
  margin-top: 0.45rem;
  flex-wrap: wrap;
}

.scenario-label {
  font-family: var(--bench-mono);
  font-size: 0.65em;
  color: #9ab4b8;
  align-self: center;
  margin-right: 0.25rem;
}

.transport-strip {
  margin-top: 0.45rem;
  margin-bottom: 0.35rem;
}

.speed-label {
  font-family: var(--bench-mono);
  font-size: 0.65em;
  color: #9ab4b8;
  align-self: center;
  margin-left: 0.35rem;
}

.speed-select {
  width: auto;
  min-width: 3.5rem;
  padding: 0.28rem 0.4rem;
}

.customer-meter {
  margin-top: 0.55rem;
  padding: 0.5rem 0.6rem;
  background: rgba(0,0,0,0.28);
  border: 1px solid var(--bench-rail);
  border-left: 3px solid #c44;
}

.customer-meter-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  font-family: var(--bench-mono);
  font-size: 0.68em;
  color: #9ab4b8;
  margin-bottom: 0.35rem;
}

.customer-meter-head strong {
  color: var(--bench-copper-soft);
  font-size: 1.05em;
}

.redline-bar {
  position: relative;
  height: 0.55rem;
  background: rgba(40, 20, 20, 0.6);
  border: 1px solid rgba(196, 68, 68, 0.45);
  border-radius: 1px;
  overflow: hidden;
}

.redline-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, #3d8a8e 0%, #b87333 72%, #c44 100%);
  transition: width 0.25s ease;
}

.redline-fill.over-budget {
  background: linear-gradient(90deg, #b87333 0%, #e05050 55%, #ff7070 100%);
  animation: redline-pulse 1.2s ease-in-out infinite;
}

@keyframes redline-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.72; }
}

.prediction-meter {
  margin-top: 0.55rem;
  padding: 0.5rem 0.6rem;
  background: rgba(0,0,0,0.28);
  border: 1px solid var(--bench-rail);
  border-left: 3px solid #3d8a8e;
}

.prediction-chart {
  display: block;
  width: 100%;
  height: 4.5rem;
  margin-top: 0.35rem;
  border: 1px solid rgba(61, 138, 142, 0.35);
  border-radius: 1px;
}

.prediction-readout {
  margin-top: 0.35rem;
  margin-bottom: 0;
}

.triple-readout {
  font-family: var(--bench-mono);
  font-size: 0.78em;
  padding: 0.5rem 0.65rem;
  margin: 0.75rem 0;
  background: #0f2224;
  color: var(--bench-copper-soft);
  text-align: center;
  letter-spacing: 0.02em;
}

.reading-card {
  margin: 1rem 0;
  padding: 0.75rem 0.9rem;
  background: var(--bench-paper-warm);
  border-top: 2px solid var(--bench-teal);
}

.reading-card dt {
  font-family: var(--bench-mono);
  font-size: 0.68em;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--bench-ink-muted);
  margin-top: 0.5rem;
}

.reading-card dt:first-child { margin-top: 0; }

.reading-card dd {
  margin: 0.15rem 0 0;
  font-size: 0.92em;
}

.code-ref {
  font-family: var(--bench-mono);
  font-size: 0.78em;
  padding: 0.85rem 1rem;
  margin: 1rem 0;
  background: #0f2224;
  color: #a8c8cc;
  overflow-x: auto;
  border-radius: 2px;
  line-height: 1.45;
}

@media (prefers-reduced-motion: reduce) {
  #bench-canvas { display: none; }
  .bench-viz .bench-btn { transition: none; }
}

@media (max-width: 480px) {
  .article-slab { padding: 1.4rem 1rem 1.6rem; }
  #bench-stage { height: 12rem; }
}