/* =========================================================
   LEARNING REWIRED LAB — SIGNAL RUNNER
   Design Lab detail page
   URL: /resource-lab/signal-runner/
   Depends on:
   - /global.css
   - /assets/css/lab-detail.css
   ========================================================= */

.signal-runner-page {
  --sr-ink: #f8fbff;
  --sr-muted: rgba(226, 232, 240, 0.76);
  --sr-muted-strong: rgba(226, 232, 240, 0.92);
  --sr-line: rgba(148, 163, 184, 0.22);
  --sr-line-strong: rgba(148, 163, 184, 0.34);
  --sr-panel: rgba(10, 24, 42, 0.78);
  --sr-panel-soft: rgba(255, 255, 255, 0.06);
  --sr-cyan: #66e3ff;
  --sr-lime: #b9ff7a;
  --sr-blue: #72a7ff;
  --sr-gold: #ffd36e;
  --sr-pink: #ff87c8;
  --sr-red: #ff8a8a;
  --sr-orange: #ffd36e;
  --sr-shadow: 0 22px 62px rgba(0, 0, 0, 0.24);
  --sr-shadow-soft: 0 16px 44px rgba(0, 0, 0, 0.18);

  position: relative;
  width: 100%;
  overflow: hidden;
  color: var(--sr-ink);
}

.signal-runner-page *,
.signal-runner-page *::before,
.signal-runner-page *::after {
  box-sizing: border-box;
}

.signal-runner-page h1,
.signal-runner-page h2,
.signal-runner-page h3,
.signal-runner-page h4,
.signal-runner-page p {
  margin: 0;
}

.signal-runner-page a {
  color: inherit;
}

.signal-runner-page button {
  font: inherit;
}

/* =========================================================
   Shared shell corrections
   ========================================================= */

.signal-runner-page .resource-detail-inner,
.signal-runner-page .dld-shell {
  width: min(1120px, calc(100% - 40px));
  max-width: 1120px;
  margin-inline: auto;
}

.signal-runner-page .resource-detail-hero {
  max-width: 1120px;
  margin: 0 auto clamp(42px, 6vw, 72px);
}

.signal-runner-page .resource-detail-hero h1 {
  max-width: 980px;
  padding-right: 0.12em;
  padding-bottom: 0.12em;
  overflow: visible;
}

.signal-runner-page .resource-detail-gradient {
  display: inline-block;
  padding-right: 0.08em;
  padding-bottom: 0.1em;
}

/* =========================================================
   Page article rhythm
   ========================================================= */

.sr-article {
  display: grid;
  gap: clamp(40px, 5vw, 64px);
  width: 100%;
  max-width: 1120px;
  margin: 0 auto;
}

.sr-section {
  width: 100%;
  margin: 0 auto;
}

.sr-reading-section,
.signal-runner-showcase {
  max-width: 920px;
  padding: clamp(24px, 4vw, 38px);
  border: 1px solid var(--sr-line);
  border-radius: 32px;
  background:
    radial-gradient(circle at 8% 0%, rgba(102, 227, 255, 0.11), transparent 34%),
    radial-gradient(circle at 92% 12%, rgba(185, 255, 122, 0.07), transparent 32%),
    rgba(255, 255, 255, 0.045);
  box-shadow: var(--sr-shadow-soft);
}

.sr-card-section,
.signal-runner-demo-section,
.signal-runner-comparison,
.sr-panel-section,
.signal-runner-code-section,
.signal-runner-adapt-section,
.signal-runner-closing {
  max-width: 1120px;
}

.signal-runner-demo-section,
.signal-runner-comparison,
.sr-panel-section,
.signal-runner-code-section,
.signal-runner-adapt-section {
  padding: clamp(24px, 4vw, 38px);
  border: 1px solid var(--sr-line);
  border-radius: 34px;
  background:
    radial-gradient(circle at 10% 0%, rgba(102, 227, 255, 0.12), transparent 34%),
    radial-gradient(circle at 92% 12%, rgba(185, 255, 122, 0.08), transparent 32%),
    rgba(255, 255, 255, 0.045);
  box-shadow: var(--sr-shadow-soft);
}

.signal-runner-section-header,
.signal-runner-demo-header,
.signal-runner-code-header,
.signal-runner-comparison-copy,
.signal-runner-adapt-copy {
  max-width: 820px;
  margin: 0 0 28px;
}

.signal-runner-kicker,
.runner-mini-kicker {
  display: inline-flex;
  width: fit-content;
  margin: 0 0 16px;
  padding: 8px 11px;
  border: 1px solid rgba(102, 227, 255, 0.2);
  border-radius: 999px;
  background: rgba(102, 227, 255, 0.1);
  color: var(--sr-cyan);
  font-size: 0.7rem;
  font-weight: 920;
  letter-spacing: 0.11em;
  line-height: 1;
  text-transform: uppercase;
}

.sr-reading-section h2,
.signal-runner-section-header h2,
.signal-runner-demo-header h2,
.signal-runner-code-header h2,
.signal-runner-comparison-copy h2,
.signal-runner-adapt-copy h2,
.signal-runner-showcase h2,
.signal-runner-closing-card h2 {
  max-width: 780px;
  margin: 0 0 18px;
  color: var(--sr-ink);
  font-size: clamp(2.15rem, 4vw, 3.15rem);
  font-weight: 820;
  line-height: 1;
  letter-spacing: -0.058em;
  text-wrap: balance;
}

.sr-reading-section p:not(.signal-runner-kicker),
.signal-runner-demo-header p:not(.signal-runner-kicker),
.signal-runner-code-header p:not(.signal-runner-kicker),
.signal-runner-adapt-copy p:not(.signal-runner-kicker),
.signal-runner-showcase p:not(.signal-runner-kicker),
.signal-runner-closing-card p:not(.signal-runner-kicker) {
  max-width: 720px;
  color: var(--sr-muted);
  font-size: clamp(1rem, 1.35vw, 1.08rem);
  line-height: 1.72;
}

.sr-reading-section p + p,
.signal-runner-showcase p + p {
  margin-top: 18px;
}

/* =========================================================
   Buttons
   ========================================================= */

.signal-runner-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 20px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-size: 15px;
  font-weight: 850;
  text-decoration: none !important;
  cursor: pointer;
  transition:
    transform 0.22s ease,
    box-shadow 0.22s ease,
    border-color 0.22s ease,
    color 0.22s ease,
    background 0.22s ease;
}

.signal-runner-btn:hover {
  transform: translateY(-2px);
}

.signal-runner-btn.primary,
.signal-runner-btn.primary:visited {
  background: linear-gradient(135deg, var(--sr-cyan), var(--sr-lime));
  color: #071321 !important;
  box-shadow: 0 14px 30px rgba(102, 227, 255, 0.18);
}

.signal-runner-btn.secondary,
.signal-runner-btn.secondary:visited {
  border-color: var(--sr-line);
  background: rgba(255, 255, 255, 0.075);
  color: var(--sr-ink) !important;
  box-shadow: none;
}

.signal-runner-page .resource-detail-btn.secondary {
  border-color: var(--sr-line);
  background: rgba(255, 255, 255, 0.075);
  color: var(--sr-ink) !important;
  box-shadow: none;
}

/* =========================================================
   Info cards
   ========================================================= */

.signal-runner-card-grid,
.signal-runner-columns,
.signal-runner-mini-grid,
.signal-runner-adapt-grid {
  display: grid;
  gap: 18px;
}

.signal-runner-card-grid,
.signal-runner-adapt-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.signal-runner-columns,
.signal-runner-mini-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.signal-runner-info-card,
.signal-runner-column,
.signal-runner-adapt-grid article,
.signal-runner-mini-grid div {
  padding: 24px;
  border: 1px solid var(--sr-line);
  border-radius: 26px;
  background:
    radial-gradient(circle at 92% 12%, rgba(102, 227, 255, 0.08), transparent 38%),
    rgba(255, 255, 255, 0.055);
  box-shadow: 0 14px 34px rgba(0, 0, 0, 0.14);
}

.signal-runner-column.strong {
  border-color: rgba(185, 255, 122, 0.32);
  background:
    radial-gradient(circle at 92% 12%, rgba(185, 255, 122, 0.1), transparent 38%),
    rgba(255, 255, 255, 0.06);
}

.signal-runner-info-card span,
.signal-runner-column span,
.signal-runner-adapt-grid span,
.signal-runner-mini-grid span {
  display: inline-flex;
  width: fit-content;
  margin-bottom: 16px;
  padding: 8px 11px;
  border-radius: 999px;
  background: rgba(102, 227, 255, 0.1);
  color: var(--sr-cyan);
  font-size: 0.68rem;
  font-weight: 920;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

.signal-runner-column.strong span {
  background: rgba(185, 255, 122, 0.1);
  color: var(--sr-lime);
}

.signal-runner-info-card h3,
.signal-runner-column h3,
.signal-runner-adapt-grid h3,
.signal-runner-mini-grid h3 {
  margin: 0 0 12px;
  color: var(--sr-ink);
  font-size: 1.35rem;
  line-height: 1.05;
  letter-spacing: -0.04em;
}

.signal-runner-info-card p,
.signal-runner-column p,
.signal-runner-adapt-grid p,
.signal-runner-mini-grid p {
  margin: 0;
  color: var(--sr-muted);
  font-size: 0.96rem;
  line-height: 1.62;
}

/* =========================================================
   Runner demo shell
   ========================================================= */

.runner-shell {
  padding: clamp(18px, 3vw, 26px);
  border: 1px solid var(--sr-line);
  border-radius: 30px;
  background:
    radial-gradient(circle at 92% 10%, rgba(102, 227, 255, 0.1), transparent 30%),
    radial-gradient(circle at 8% 92%, rgba(185, 255, 122, 0.08), transparent 34%),
    rgba(255, 255, 255, 0.045);
  box-shadow: var(--sr-shadow);
}

.runner-demo-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 20px;
  align-items: end;
  margin-bottom: 18px;
}

.runner-demo-head h3 {
  margin: 0;
  color: var(--sr-ink);
  font-size: clamp(1.8rem, 3vw, 2.6rem);
  line-height: 1;
  letter-spacing: -0.045em;
}

.runner-stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(96px, 1fr));
  gap: 10px;
}

.runner-stat {
  min-height: 76px;
  padding: 14px;
  border: 1px solid var(--sr-line);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.055);
}

.runner-stat span {
  display: block;
  margin-bottom: 5px;
  color: var(--sr-muted);
  font-size: 0.74rem;
  font-weight: 850;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.runner-stat strong {
  display: block;
  color: var(--sr-cyan);
  font-size: 1.55rem;
  line-height: 1;
}

.runner-stat.red strong {
  color: var(--sr-red);
}

.runner-stat.purple strong {
  color: var(--sr-lime);
}

/* =========================================================
   Game layout
   ========================================================= */

.runner-game-layout {
  display: grid;
  grid-template-columns: 170px minmax(0, 1fr) 150px;
  gap: 14px;
  align-items: stretch;
}

.runner-lane-list,
.runner-side {
  display: grid;
  gap: 0;
  border: 1px solid var(--sr-line);
  border-radius: 18px;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.045);
}

.runner-lane-key {
  min-height: 62px;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  border-bottom: 1px solid var(--sr-line);
}

.runner-lane-key:last-child {
  border-bottom: none;
}

.runner-lane-key span {
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  flex: 0 0 auto;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.07);
  color: var(--sr-cyan);
}

.runner-lane-key b {
  display: block;
  color: var(--sr-ink);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.runner-lane-key small {
  display: block;
  margin-top: 3px;
  color: var(--sr-muted);
  font-size: 0.72rem;
}

.runner-lane-key.teal span,
.runner-lane-key.teal b {
  color: var(--sr-cyan);
}

.runner-lane-key.blue span,
.runner-lane-key.blue b {
  color: var(--sr-blue);
}

.runner-lane-key.red span,
.runner-lane-key.red b {
  color: var(--sr-red);
}

.runner-lane-key.purple span,
.runner-lane-key.purple b {
  color: var(--sr-pink);
}

.runner-lane-key.orange span,
.runner-lane-key.orange b {
  color: var(--sr-gold);
}

.runner-stage {
  position: relative;
  height: 372px;
  overflow: hidden;
  border: 1px solid var(--sr-line);
  border-radius: 18px;
  background:
    linear-gradient(90deg, rgba(148, 163, 184, 0.075) 1px, transparent 1px),
    linear-gradient(rgba(148, 163, 184, 0.075) 1px, transparent 1px),
    rgba(3, 8, 18, 0.4);
  background-size: 44px 44px;
}

.runner-stage:focus {
  outline: 3px solid rgba(102, 227, 255, 0.26);
  outline-offset: 4px;
}

.runner-lane {
  position: absolute;
  left: 0;
  right: 0;
  height: 62px;
  border-bottom: 1px dashed rgba(148, 163, 184, 0.36);
}

.runner-lane:nth-child(1) { top: 0; }
.runner-lane:nth-child(2) { top: 62px; }
.runner-lane:nth-child(3) { top: 124px; }
.runner-lane:nth-child(4) { top: 186px; }
.runner-lane:nth-child(5) { top: 248px; }
.runner-lane:nth-child(6) {
  top: 310px;
  border-bottom: none;
}

.runner-player {
  position: absolute;
  left: 50%;
  bottom: 18px;
  transform: translateX(-50%);
  width: 48px;
  height: 48px;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--sr-cyan), var(--sr-lime));
  box-shadow: 0 14px 26px rgba(102, 227, 255, 0.22);
  z-index: 20;
  transition:
    left 0.15s ease,
    bottom 0.15s ease;
}

.runner-player::before {
  content: "▲";
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  color: #071321;
  font-weight: 950;
  font-size: 1.1rem;
}

.runner-token {
  position: absolute;
  height: 34px;
  min-width: 122px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 12px;
  border-radius: 999px;
  border: 1px solid var(--sr-line);
  background: rgba(255, 255, 255, 0.9);
  color: #071321;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.18);
  font-size: 0.72rem;
  font-weight: 850;
  white-space: nowrap;
  z-index: 12;
}

.runner-token.good {
  border-color: rgba(185, 255, 122, 0.7);
  background: rgba(185, 255, 122, 0.9);
}

.runner-token.bad {
  border-color: rgba(255, 138, 138, 0.7);
  background: rgba(255, 138, 138, 0.9);
}

.runner-token.bonus {
  border-color: rgba(255, 211, 110, 0.8);
  background: rgba(255, 211, 110, 0.95);
}

.runner-token::before {
  margin-right: 7px;
}

.runner-token.good::before { content: "◆"; }
.runner-token.bad::before { content: "●"; }
.runner-token.bonus::before { content: "★"; }

/* =========================================================
   Overlay / controls
   ========================================================= */

.runner-overlay {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 20px;
  background: rgba(3, 8, 18, 0.72);
  backdrop-filter: blur(8px);
  z-index: 40;
}

.runner-start {
  max-width: 520px;
  padding: 28px;
  border: 1px solid var(--sr-line);
  border-radius: 24px;
  background:
    radial-gradient(circle at top right, rgba(102, 227, 255, 0.12), transparent 42%),
    rgba(10, 24, 42, 0.94);
  box-shadow: var(--sr-shadow);
  text-align: center;
}

.runner-start h3 {
  margin: 0 0 10px;
  color: var(--sr-ink);
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1;
  letter-spacing: -0.055em;
}

.runner-start p {
  margin: 0 0 20px;
  color: var(--sr-muted);
  line-height: 1.6;
}

.runner-control-card,
.runner-tip-card {
  padding: 16px;
  border-bottom: 1px solid var(--sr-line);
  background: rgba(255, 255, 255, 0.045);
}

.runner-tip-card {
  border-bottom: none;
}

.runner-control-card {
  text-align: center;
}

.runner-side-title {
  margin-bottom: 12px;
  color: var(--sr-cyan);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-weight: 920;
}

.runner-controls {
  display: grid;
  grid-template-columns: repeat(3, 38px);
  grid-template-rows: repeat(2, 38px);
  gap: 6px;
  justify-content: center;
  margin-bottom: 12px;
}

.runner-control {
  border: 1px solid var(--sr-line);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.07);
  color: var(--sr-ink);
  font-weight: 950;
  cursor: pointer;
}

.runner-control:hover {
  background: rgba(102, 227, 255, 0.12);
}

.runner-control.up { grid-column: 2; grid-row: 1; }
.runner-control.left { grid-column: 1; grid-row: 2; }
.runner-control.down { grid-column: 2; grid-row: 2; }
.runner-control.right { grid-column: 3; grid-row: 2; }

.runner-control-card p,
.runner-tip-card p {
  margin: 0;
  color: var(--sr-muted);
  font-size: 0.78rem;
  line-height: 1.45;
}

/* =========================================================
   Badges
   ========================================================= */

.runner-badges {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 12px;
  margin-top: 16px;
}

.runner-badge {
  min-height: 92px;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px;
  border: 1px solid var(--sr-line);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.045);
  opacity: 0.52;
  filter: grayscale(1);
  transition:
    opacity 0.2s ease,
    filter 0.2s ease,
    transform 0.2s ease,
    box-shadow 0.2s ease;
}

.runner-badge.unlocked {
  opacity: 1;
  filter: none;
  transform: translateY(-2px);
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.18);
}

.runner-badge-icon {
  flex: 0 0 auto;
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  border-radius: 14px;
  border: 2px solid currentColor;
  font-size: 1.2rem;
}

.runner-badge.teal { color: var(--sr-cyan); }
.runner-badge.blue { color: var(--sr-blue); }
.runner-badge.red { color: var(--sr-red); }
.runner-badge.purple { color: var(--sr-pink); }
.runner-badge.orange { color: var(--sr-gold); }

.runner-badge strong {
  display: block;
  margin-bottom: 4px;
  color: var(--sr-ink);
  font-size: 0.86rem;
}

.runner-badge span {
  display: block;
  color: var(--sr-muted);
  font-size: 0.76rem;
  line-height: 1.35;
}

/* =========================================================
   Starter code
   ========================================================= */

.signal-runner-code-box {
  overflow: hidden;
  border: 1px solid var(--sr-line);
  border-radius: 26px;
  background: rgba(3, 8, 18, 0.92);
  box-shadow: var(--sr-shadow);
}

.signal-runner-code-box pre {
  margin: 0;
  max-height: 560px;
  overflow: auto;
  padding: clamp(18px, 3vw, 26px);
  color: rgba(226, 232, 240, 0.92);
  font-size: 0.84rem;
  line-height: 1.65;
}

.signal-runner-code-box code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
}

/* =========================================================
   Closing
   ========================================================= */

.signal-runner-closing-card {
  width: 100%;
  max-width: 980px;
  margin: 0 auto;
  padding: clamp(28px, 5vw, 46px);
  border: 1px solid var(--sr-line);
  border-radius: 34px;
  background:
    radial-gradient(circle at 18% 8%, rgba(102, 227, 255, 0.14), transparent 34%),
    radial-gradient(circle at 88% 20%, rgba(185, 255, 122, 0.09), transparent 36%),
    rgba(255, 255, 255, 0.055);
  box-shadow: var(--sr-shadow);
  text-align: left;
}

.signal-runner-closing-card p {
  max-width: 760px;
}

.signal-runner-closing-card .resource-detail-actions {
  justify-content: flex-start;
  margin-top: 26px;
}

/* =========================================================
   Responsive
   ========================================================= */

@media (max-width: 1100px) {
  .runner-demo-head,
  .runner-game-layout {
    grid-template-columns: 1fr;
  }

  .runner-stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .runner-lane-list {
    display: none;
  }

  .runner-badges,
  .signal-runner-card-grid,
  .signal-runner-adapt-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .signal-runner-columns,
  .signal-runner-mini-grid {
    grid-template-columns: 1fr;
  }

  .runner-side {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .runner-control-card,
  .runner-tip-card {
    border-bottom: none;
  }

  .runner-control-card {
    border-right: 1px solid var(--sr-line);
  }
}

@media (max-width: 760px) {
  .signal-runner-page .resource-detail-inner,
  .signal-runner-page .dld-shell {
    width: min(100% - 32px, 1120px);
  }

  .sr-article {
    gap: 42px;
  }

  .sr-reading-section,
  .signal-runner-showcase,
  .signal-runner-demo-section,
  .signal-runner-comparison,
  .sr-panel-section,
  .signal-runner-code-section,
  .signal-runner-adapt-section,
  .signal-runner-closing-card {
    padding: 20px;
    border-radius: 26px;
  }

  .sr-reading-section h2,
  .signal-runner-section-header h2,
  .signal-runner-demo-header h2,
  .signal-runner-code-header h2,
  .signal-runner-comparison-copy h2,
  .signal-runner-adapt-copy h2,
  .signal-runner-showcase h2,
  .signal-runner-closing-card h2 {
    font-size: clamp(2.1rem, 10vw, 3.1rem);
    line-height: 1;
  }

  .runner-shell {
    padding: 16px;
    border-radius: 24px;
  }

  .runner-stats,
  .runner-badges,
  .signal-runner-card-grid,
  .signal-runner-adapt-grid {
    grid-template-columns: 1fr;
  }

  .runner-side {
    grid-template-columns: 1fr;
  }

  .runner-control-card {
    border-right: none;
    border-bottom: 1px solid var(--sr-line);
  }

  .runner-stage {
    height: 372px;
  }

  .runner-token {
    min-width: 104px;
    font-size: 0.68rem;
  }

  .signal-runner-btn,
  .signal-runner-closing-card .resource-detail-actions,
  .signal-runner-closing-card .resource-detail-btn {
    width: 100%;
  }

  .signal-runner-code-box pre {
    font-size: 12px;
  }
}

@media (max-width: 560px) {
  .signal-runner-page .resource-detail-inner,
  .signal-runner-page .dld-shell {
    width: min(100% - 28px, 1120px);
  }

  .signal-runner-info-card,
  .signal-runner-column,
  .signal-runner-adapt-grid article,
  .signal-runner-mini-grid div {
    padding: 20px;
    border-radius: 22px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .signal-runner-btn,
  .runner-player,
  .runner-badge,
  .runner-token {
    transition: none !important;
  }

  .signal-runner-btn:hover,
  .runner-badge.unlocked {
    transform: none !important;
  }
}

/* =========================================================
   v2 LIGHT EDITORIAL MIGRATION
   ---------------------------------------------------------
   Dark glass theme (--sr-ink near-white, translucent-white
   surfaces for a dark page) re-skinned to the light system.
   The runner "game" overlays were dark stages with light text;
   converted to light surfaces so their text reads. The
   .signal-runner-code-box stays dark (its code text is light).
   ========================================================= */
.signal-runner-page {
  --sr-ink: #0f172a;
  --sr-muted: #475569;
  --sr-muted-strong: #334155;
  --sr-line: rgba(15, 23, 42, 0.10);
  --sr-line-strong: rgba(15, 23, 42, 0.16);
  --sr-cyan: #0e7490;
  --sr-shadow: 0 18px 44px rgba(15, 23, 42, 0.08);
  --sr-shadow-soft: 0 12px 30px rgba(15, 23, 42, 0.06);
}

.signal-runner-page .sr-reading-section,
.signal-runner-page .signal-runner-showcase,
.signal-runner-page .signal-runner-demo-section,
.signal-runner-page .signal-runner-comparison,
.signal-runner-page .sr-panel-section,
.signal-runner-page .signal-runner-code-section,
.signal-runner-page .signal-runner-adapt-section,
.signal-runner-page .runner-shell {
  background: #f8fafc;
}

.signal-runner-page .signal-runner-info-card,
.signal-runner-page .signal-runner-column,
.signal-runner-page .signal-runner-adapt-grid article,
.signal-runner-page .signal-runner-mini-grid div,
.signal-runner-page .runner-stat,
.signal-runner-page .runner-lane-list,
.signal-runner-page .runner-side,
.signal-runner-page .runner-control-card,
.signal-runner-page .runner-tip-card,
.signal-runner-page .runner-control,
.signal-runner-page .signal-runner-btn.secondary,
.signal-runner-page .signal-runner-btn.secondary:visited,
.signal-runner-page .resource-detail-btn.secondary,
.signal-runner-page .signal-runner-closing-card {
  background: #ffffff;
  box-shadow: 0 8px 22px rgba(15, 23, 42, 0.06);
}

.signal-runner-page .signal-runner-column.strong,
.signal-runner-page .runner-badge,
.signal-runner-page .runner-lane-key span {
  background: #eef6ff;
}

.signal-runner-page .runner-overlay,
.signal-runner-page .runner-start {
  background: #f1f5f9;
}