@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Space+Grotesk:wght@400;500;600;700&display=swap');

:root {
  --bg: #20242c;
  --bg-deep: #1a1d24;
  --surface: #272c35;
  --surface-2: #2d333d;
  --text: #eceef0;
  --soft: #c2c7cf;
  --muted: #9aa1ac;
  --faint: #8d94a0;
  --hairline: #343a45;
  --hairline-strong: #484f5c;
  --accent: #9cb6d8;
  --accent-soft: rgba(156, 182, 216, 0.12);
  --accent-line: rgba(156, 182, 216, 0.4);
  --d1: #7db3ff; /* blue - LaDeDa / Spatial */
  --d2: #f2a65a; /* orange - CLIP / Semantics */
  --d3: #62d2a2; /* green - Real / Low anomaly */
  --danger: #ef6b73; /* red - Synthetic / High anomaly */
  --danger-soft: rgba(239, 107, 115, 0.12);
  --danger-line: rgba(239, 107, 115, 0.4);
  --success: #62d2a2;
  --success-soft: rgba(98, 210, 162, 0.12);
  --success-line: rgba(98, 210, 162, 0.4);
  --font-display: "Space Grotesk", "Inter", "Helvetica Neue", system-ui, -apple-system, sans-serif;
  --font-body: "Inter", "Helvetica Neue", "Segoe UI", system-ui, -apple-system, sans-serif;
  --font-mono: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;
  --container: 74rem;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

*, *::before, *::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

::selection {
  background: var(--accent);
  color: var(--bg);
}

h1, h2, h3, h4, p, ul, ol, figure, pre {
  margin: 0;
}

a {
  color: inherit;
}

.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: 1.2rem;
}

@media (min-width: 768px) {
  .container {
    padding-inline: 3rem;
  }
}

.icon {
  width: 1em;
  height: 1em;
  flex: none;
  display: inline-block;
  vertical-align: -0.12em;
}

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

.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 0.9rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.eyebrow-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-soft);
  border: 1px solid var(--accent-line);
  padding: 0.22rem 0.65rem;
}

.badge--fake {
  color: var(--danger);
  background: var(--danger-soft);
  border-color: var(--danger-line);
}

.badge--real {
  color: var(--success);
  background: var(--success-soft);
  border-color: var(--success-line);
}

.tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--soft);
  background: var(--bg-deep);
  border: 1px solid var(--hairline);
  padding: 0.2rem 0.6rem;
}

/* Header */
.site-header {
  border-bottom: 1px solid var(--hairline);
  background: rgba(32, 36, 44, 0.88);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  position: sticky;
  top: 0;
  z-index: 50;
}

.site-nav {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  flex-wrap: wrap;
  row-gap: 0.6rem;
  column-gap: 2rem;
  padding-block: 1rem;
}

.site-brand {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--text);
  text-decoration: none;
  white-space: nowrap;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.site-brand span {
  color: var(--accent);
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1.6rem;
  list-style: none;
  padding: 0;
  margin: 0;
}

/* The mock badge's slot stays out of the gap math when the badge is hidden. */
.nav-links li:has(> [hidden]) {
  display: none;
}

.nav-links a {
  position: relative;
  color: var(--soft);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 0.3s var(--ease);
}

.nav-links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 100%;
  height: 1px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.35s var(--ease);
}

.nav-links a:hover {
  color: var(--accent);
}

.nav-links a:hover::after {
  transform: scaleX(1);
}

/* Mock banner */
.mock-indicator {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  padding: 0.15rem 0.5rem;
  background: rgba(242, 166, 90, 0.15);
  border: 1px solid rgba(242, 166, 90, 0.4);
  color: var(--d2);
}

.mock-indicator[hidden] {
  display: none !important;
}

/* Hero */
.hero {
  position: relative;
  padding-block: clamp(3rem, 7vh, 5rem) clamp(2.5rem, 5vh, 4rem);
  border-bottom: 1px solid var(--hairline);
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(var(--hairline) 1px, transparent 1px),
    linear-gradient(90deg, var(--hairline) 1px, transparent 1px);
  background-size: 44px 44px;
  opacity: 0.22;
  -webkit-mask-image: radial-gradient(ellipse 70% 90% at 70% 0%, #000 0%, transparent 75%);
  mask-image: radial-gradient(ellipse 70% 90% at 70% 0%, #000 0%, transparent 75%);
  pointer-events: none;
}

.hero > .container {
  position: relative;
}

.hero-title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(2.2rem, 5vw, 3.8rem);
  line-height: 1.1;
  letter-spacing: -0.025em;
  max-width: 25ch;
  margin-bottom: 1.2rem;
}

.hero-title em {
  font-style: normal;
  color: var(--accent);
}

.hero-lede {
  font-size: clamp(1.05rem, 1.6vw, 1.22rem);
  line-height: 1.6;
  color: var(--soft);
  max-width: 48rem;
  margin-bottom: 1.6rem;
}

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  list-style: none;
  padding: 0;
  margin: 0;
}

/* Section styling */
.section {
  padding-block: clamp(2.5rem, 6vh, 4.5rem);
  border-bottom: 1px solid var(--hairline);
}

.section-head {
  margin-bottom: 2rem;
}

.section-title {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.section-sub {
  color: var(--muted);
  font-size: 0.92rem;
  margin-top: 0.4rem;
  max-width: 48rem;
}

/* Panel cards */
.panel {
  background: var(--surface);
  border: 1px solid var(--hairline);
  position: relative;
}

.panel-head {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem 1.6rem;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.4rem;
  border-bottom: 1px solid var(--hairline);
}

.panel-title {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1.1rem;
  letter-spacing: -0.01em;
}

.panel-body {
  padding: 1.4rem;
}

/* Upload card */
.upload-wrap {
  display: grid;
  gap: 1.4rem;
}

@media (min-width: 900px) {
  .upload-wrap {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
  }
}

.dropzone {
  border: 2px dashed var(--hairline-strong);
  background: var(--bg-deep);
  padding: clamp(2rem, 5vw, 3.2rem) 1.5rem;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.25s var(--ease), background 0.25s var(--ease);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.9rem;
}

.dropzone:hover, .dropzone.is-dragover {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.dropzone-icon {
  width: 2.8rem;
  height: 2.8rem;
  color: var(--accent);
  margin-bottom: 0.2rem;
}

.dropzone-prompt {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1.05rem;
  color: var(--text);
}

.dropzone-hint {
  font-size: 0.82rem;
  color: var(--muted);
  max-width: 24rem;
  line-height: 1.5;
}

.upload-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 0.5rem;
}

.btn {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 500;
  letter-spacing: 0.03em;
  padding: 0.6rem 1.2rem;
  border: 1px solid var(--hairline-strong);
  background: var(--surface-2);
  color: var(--text);
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  transition: all 0.25s var(--ease);
}

.btn:hover:not(:disabled) {
  border-color: var(--accent-line);
  background: var(--accent-soft);
  color: var(--accent);
}

.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.btn--primary {
  background: var(--accent);
  color: var(--bg);
  border-color: var(--accent);
  font-weight: 600;
}

.btn--primary:hover:not(:disabled) {
  background: #b5cce8;
  color: var(--bg);
  border-color: #b5cce8;
}

.btn--sm {
  font-size: 0.74rem;
  padding: 0.35rem 0.75rem;
}

/* Preview card */
.preview-card {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.preview-media {
  position: relative;
  background: var(--bg-deep);
  border: 1px solid var(--hairline);
  min-height: 14rem;
  display: grid;
  place-items: center;
  overflow: hidden;
}

.preview-media img {
  max-width: 100%;
  max-height: 18rem;
  object-fit: contain;
  display: block;
}

.preview-empty {
  color: var(--faint);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  text-align: center;
  padding: 2rem;
}

.preview-meta {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--hairline);
  border: 1px solid var(--hairline);
}

.meta-item {
  background: var(--surface);
  padding: 0.6rem 0.8rem;
}

.meta-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--muted);
  text-transform: uppercase;
}

.meta-val {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text);
  margin-top: 0.15rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* Error banner */
.error-banner {
  background: var(--danger-soft);
  border: 1px solid var(--danger-line);
  padding: 0.8rem 1.1rem;
  color: var(--danger);
  font-size: 0.88rem;
  display: flex;
  align-items: flex-start;
  gap: 0.8rem;
  margin-top: 1rem;
}

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

/* Verdict section */
.verdict-grid {
  display: grid;
  gap: 1.2rem;
}

@media (min-width: 900px) {
  .verdict-grid {
    grid-template-columns: 1.3fr 1fr;
  }
}

.verdict-hero {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 1.4rem;
}

.verdict-main {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.verdict-status {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3.8vw, 2.6rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.1;
}

.verdict-status.is-fake {
  color: var(--danger);
}

.verdict-status.is-real {
  color: var(--success);
}

/* Expert Disagreement Warning Banner */
.agreement-banner {
  background: rgba(242, 166, 90, 0.12);
  border: 1px solid rgba(242, 166, 90, 0.4);
  padding: 0.85rem 1rem;
  margin-block: 0.4rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

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

.agreement-banner-header {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  color: var(--d2);
  font-weight: 600;
  font-size: 0.95rem;
  line-height: 1.2;
}

.agreement-warning-icon {
  font-size: 1rem;
  line-height: 1;
}

.agreement-title {
  font-family: var(--font-display);
}

.agreement-message {
  font-size: 0.85rem;
  line-height: 1.45;
  color: var(--text);
  margin: 0;
}

.agreement-check {
  border-top: 1px solid rgba(242, 166, 90, 0.25);
  padding-top: 0.55rem;
}

.agreement-check-title {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--soft);
  margin-bottom: 0.45rem;
}

.agreement-signals {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.agreement-signal-row {
  display: grid;
  grid-template-columns: 1fr auto 90px 18px;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.78rem;
}

.agreement-signal-label {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: var(--soft);
}

.agreement-signal-row.is-contradicting .agreement-signal-label {
  color: var(--d2);
  font-weight: 500;
}

.agreement-signal-prob {
  font-size: 0.78rem;
  color: var(--text);
  min-width: 42px;
  text-align: right;
}

.agreement-signal-bar {
  width: 100%;
}

.agreement-signal-bar .variant-bar-track {
  height: 8px;
}

.agreement-signal-bar .variant-tick {
  top: -3px;
  bottom: -3px;
}

.agreement-signal-warn {
  color: var(--d2);
  font-size: 0.85rem;
  text-align: center;
  line-height: 1;
  min-width: 14px;
}

@media (max-width: 500px) {
  .agreement-signal-row {
    grid-template-columns: 1fr auto 65px 16px;
    gap: 0.4rem;
    font-size: 0.74rem;
  }
}

.verdict-prob {
  font-family: var(--font-mono);
  font-size: clamp(2.4rem, 5vw, 3.6rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--text);
}

.verdict-prob small {
  font-size: 0.45em;
  color: var(--muted);
  font-weight: 400;
  margin-left: 0.3em;
}

.verdict-subtext {
  font-size: 0.88rem;
  color: var(--soft);
}

/* Gauge Meter */
.gauge-wrap {
  margin-top: 0.5rem;
}

.gauge-track {
  height: 12px;
  background: var(--bg-deep);
  border: 1px solid var(--hairline);
  position: relative;
  overflow: visible;
}

.gauge-fill {
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  width: 0%;
  background: linear-gradient(90deg, var(--d3) 0%, var(--d2) 40%, var(--danger) 100%);
  transition: width 0.9s var(--ease);
}

.gauge-tick {
  position: absolute;
  top: -6px;
  bottom: -6px;
  width: 2px;
  background: #ffffff;
  box-shadow: 0 0 6px rgba(255, 255, 255, 0.6);
  z-index: 3;
  transform: translateX(-50%);
}

.gauge-tick-label {
  position: absolute;
  top: -24px;
  transform: translateX(-50%);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--text);
  background: var(--bg-deep);
  border: 1px solid var(--hairline-strong);
  padding: 0.1rem 0.35rem;
  white-space: nowrap;
}

.gauge-labels {
  display: flex;
  justify-content: space-between;
  margin-top: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--muted);
}

/* Timing stats */
.stats-strip {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--hairline);
  border: 1px solid var(--hairline);
}

@media (min-width: 600px) {
  .stats-strip {
    grid-template-columns: repeat(4, 1fr);
  }
}

.strip-item {
  background: var(--surface);
  padding: 0.8rem 1rem;
}

.strip-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--muted);
  text-transform: uppercase;
}

.strip-val {
  font-family: var(--font-mono);
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text);
  margin-top: 0.15rem;
}

/* Pipeline Diagram */
.pipeline-card {
  overflow: hidden;
}

.pipeline-svg-container {
  width: 100%;
  overflow-x: auto;
  background: var(--bg-deep);
  padding: 1.4rem 1rem;
}

.pipeline-svg {
  display: block;
  min-width: 820px;
  width: 100%;
  height: auto;
}

/* Phones: pipeline-layout.js redraws the diagram top to bottom, so it fits the width without scrolling. */
.pipeline-svg--vertical {
  min-width: 0;
  max-width: 420px;
  margin: 0 auto;
}

/* Grid items default to min-width: auto, which lets the wide gradient table push the column off screen. */
.attribution-grid > * {
  min-width: 0;
}

/* SVG node styling */
.p-node {
  fill: var(--surface);
  stroke: var(--hairline-strong);
  stroke-width: 1.5;
  transition: stroke 0.4s var(--ease), filter 0.4s var(--ease);
}

.p-node.is-active {
  stroke: var(--accent);
  filter: drop-shadow(0 0 8px var(--accent-soft));
}

.p-node.is-fake {
  stroke: var(--danger);
  filter: drop-shadow(0 0 8px var(--danger-soft));
}

.p-node.is-real {
  stroke: var(--success);
  filter: drop-shadow(0 0 8px var(--success-soft));
}

.p-link {
  fill: none;
  stroke: var(--hairline-strong);
  stroke-width: 1.5;
  transition: stroke 0.4s var(--ease);
}

.p-link.is-active {
  stroke: var(--accent);
  stroke-dasharray: 6 3;
  animation: flowLine 1.5s linear infinite;
}

@keyframes flowLine {
  from {
    stroke-dashoffset: 27;
  }
  to {
    stroke-dashoffset: 0;
  }
}

.p-text-title {
  font-family: var(--font-display);
  font-size: 11px;
  font-weight: 600;
  fill: var(--text);
}

.p-text-sub {
  font-family: var(--font-mono);
  font-size: 9.5px;
  fill: var(--muted);
}

.p-text-val {
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 600;
  fill: var(--accent);
}

/* Heatmap & Spectrum interactive viewers */
.heatmaps-grid {
  display: grid;
  gap: 1.4rem;
  margin-top: 1.4rem;
}

@media (min-width: 860px) {
  .heatmaps-grid {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
  }
}

.heatmap-viewer {
  background: var(--bg-deep);
  border: 1px solid var(--hairline);
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}

.heatmap-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.heatmap-title {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text);
}

.canvas-wrap {
  position: relative;
  width: 100%;
  aspect-ratio: 1;
  max-height: 340px;
  background: #000;
  border: 1px solid var(--hairline);
  display: grid;
  place-items: center;
  overflow: hidden;
}

.canvas-wrap { position: relative; }

.canvas-wrap canvas {
  display: block;
  width: 100%;
  height: 100%;
  image-rendering: pixelated;
}

/* The model sees the photo stretched to 256 x 256, so the photo and the patch map share that square. */
#patch-canvas { position: absolute; inset: 0; z-index: 1; }

.canvas-overlay-img {
  position: absolute;
  inset: 0;
  z-index: 0;
  width: 100%;
  height: 100%;
  object-fit: fill;
  pointer-events: none;
}

.controls-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--soft);
}

.controls-row input[type="range"] {
  flex: 1;
  accent-color: var(--accent);
}

.stats-legend {
  display: flex;
  gap: 1rem;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--muted);
}

/* Section 5: Attribution / Who decided */
.attribution-grid {
  display: grid;
  gap: 1.4rem;
}

@media (min-width: 900px) {
  .attribution-grid {
    grid-template-columns: 1fr 1.2fr;
  }
}

.share-card {
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
}

.share-bar-container {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.share-bar {
  display: flex;
  height: 24px;
  border: 1px solid var(--hairline-strong);
  background: var(--bg-deep);
  overflow: hidden;
}

.share-segment {
  height: 100%;
  transition: width 0.8s var(--ease);
  position: relative;
}

.share-segment--ladeda {
  background: var(--d1);
}

.share-segment--clip {
  background: var(--d2);
}

.share-labels {
  display: flex;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.82rem;
}

.share-label-item {
  display: flex;
  align-items: center;
  gap: 0.45rem;
}

.swatch {
  width: 10px;
  height: 10px;
  display: inline-block;
}

.formula-box {
  background: var(--bg-deep);
  border: 1px solid var(--hairline);
  padding: 1rem 1.2rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--soft);
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.formula-box b {
  color: var(--text);
}

.explanation-text {
  font-size: 0.92rem;
  color: var(--soft);
  line-height: 1.6;
}

/* Gradient sensitivity table */
.grad-table-wrap {
  overflow-x: auto;
  border: 1px solid var(--hairline);
}

.grad-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.84rem;
  min-width: 28rem;
}

.grad-table th, .grad-table td {
  padding: 0.65rem 0.9rem;
  border-bottom: 1px solid var(--hairline);
  text-align: left;
}

.grad-table th {
  background: var(--surface-2);
  color: var(--text);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.grad-table td {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  color: var(--soft);
}

.grad-table tr:last-child td {
  border-bottom: 0;
}

.grad-bar-cell {
  width: 35%;
}

.mini-bar-track {
  height: 6px;
  background: var(--bg-deep);
  border: 1px solid var(--hairline);
  position: relative;
  width: 100%;
}

.mini-bar-fill {
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  background: var(--accent);
}

/* Section 6: Variants chart */
.variants-wrap {
  display: flex;
  flex-direction: column;
  gap: 1.8rem;
}

.group-section {
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
}

.group-title {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  border-bottom: 1px solid var(--hairline);
  padding-bottom: 0.35rem;
}

.variant-row {
  display: grid;
  grid-template-columns: minmax(130px, 1.2fr) minmax(160px, 3fr) 80px;
  align-items: center;
  gap: 0.8rem 1.2rem;
  padding: 0.55rem 0.8rem;
  background: var(--surface);
  border: 1px solid var(--hairline);
  cursor: pointer;
  transition: all 0.25s var(--ease);
  position: relative;
}

.variant-row:hover, .variant-row.is-selected {
  border-color: var(--accent-line);
  background: var(--surface-2);
  transform: translateX(2px);
}

.variant-row--metafake {
  border-color: var(--accent);
  background: rgba(156, 182, 216, 0.06);
}

.variant-name {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 0.92rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.variant-row--metafake .variant-name {
  color: var(--accent);
  font-weight: 600;
}

.variant-bar-track {
  position: relative;
  height: 10px;
  background: var(--bg-deep);
  border: 1px solid var(--hairline);
}

.variant-bar-fill {
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  background: var(--accent);
  transition: width 0.7s var(--ease);
}

.variant-bar-fill.is-fake {
  background: var(--danger);
}

.variant-bar-fill.is-real {
  background: var(--success);
}

.variant-tick {
  position: absolute;
  top: -4px;
  bottom: -4px;
  width: 2px;
  background: #ffffff;
  z-index: 2;
  transform: translateX(-50%);
}

.variant-val {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  text-align: right;
  color: var(--text);
  font-variant-numeric: tabular-nums;
}

/* Tooltip / detail flyout */
.variant-tooltip {
  position: fixed;
  z-index: 100;
  min-width: min(18rem, calc(100vw - 2rem));
  max-width: min(24rem, calc(100vw - 2rem));
  background: var(--bg-deep);
  border: 1px solid var(--hairline-strong);
  padding: 1rem 1.2rem;
  box-shadow: 0 16px 36px -10px rgba(0, 0, 0, 0.75);
  pointer-events: none;
  opacity: 0;
  transform: translateY(6px);
  transition: opacity 0.15s, transform 0.15s;
}

.variant-tooltip.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.tooltip-title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.05rem;
  color: var(--text);
  margin-bottom: 0.3rem;
}

.tooltip-desc {
  font-size: 0.8rem;
  color: var(--muted);
  line-height: 1.5;
  margin-bottom: 0.8rem;
}

.tooltip-metrics {
  border-top: 1px solid var(--hairline);
  padding-top: 0.6rem;
  display: grid;
  gap: 0.3rem;
  font-family: var(--font-mono);
  font-size: 0.74rem;
}

.tooltip-metric-row {
  display: flex;
  justify-content: space-between;
  color: var(--soft);
}

.tooltip-metric-row b {
  color: var(--text);
}

/* Footer */
.site-footer {
  padding-block: 3.5rem 3rem;
  background: var(--bg-deep);
  border-top: 1px solid var(--hairline);
  margin-top: 2rem;
}

.footer-grid {
  display: grid;
  gap: 2rem;
}

@media (min-width: 800px) {
  .footer-grid {
    grid-template-columns: 2fr 1fr;
    align-items: start;
  }
}

.footer-brand {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.3rem;
  letter-spacing: -0.01em;
  margin-bottom: 0.5rem;
}

.footer-pitch {
  color: var(--muted);
  font-size: 0.88rem;
  max-width: 38rem;
  line-height: 1.6;
  margin-bottom: 1.2rem;
}

.footer-notes {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 0.45rem;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--faint);
}

.footer-notes li::before {
  content: "— ";
  color: var(--accent);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-links a {
  color: var(--soft);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 0.25s var(--ease);
}

.footer-links a:hover {
  color: var(--accent);
}

/* Mobile responsive adjustments down to 375px */
@media (max-width: 640px) {
  .pipeline-svg-container {
    padding: 1rem 0.5rem;
  }

  /* One swipeable row of links instead of three wrapped lines eating the sticky header. */
  .site-nav {
    padding-block: 0.7rem;
    row-gap: 0.4rem;
  }
  .nav-links {
    flex-wrap: nowrap;
    width: 100%;
    overflow-x: auto;
    scrollbar-width: none;
    padding-bottom: 6px;
  }
  .nav-links::-webkit-scrollbar {
    display: none;
  }
  .nav-links li {
    flex: none;
    white-space: nowrap;
  }
  .grad-table {
    min-width: 0;
    font-size: 0.74rem;
  }
  .grad-table th, .grad-table td {
    padding: 0.5rem 0.4rem;
  }
  .grad-table th {
    font-size: 0.64rem;
    letter-spacing: 0.02em;
  }
  .grad-bar-cell {
    width: 22%;
  }
}

@media (max-width: 500px) {
  .variant-row {
    grid-template-columns: 1fr auto;
  }
  .variant-bar-wrap {
    grid-column: 1 / -1;
  }
  .stats-strip {
    grid-template-columns: 1fr;
  }
  .preview-meta {
    grid-template-columns: 1fr;
  }
}

/* "Runs on" hardware and software grid */
.system-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1px;
  margin: 0;
  background: var(--hairline);
}
.system-grid > div { background: var(--surface); padding: 14px 16px; min-width: 0; }
.system-grid dt { font-size: 0.7rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted); }
.system-grid dd { margin: 6px 0 0; font-family: var(--font-mono); overflow-wrap: anywhere; }