/* src/styles.css — heat-metrics-lab brand + chapter layout + reduced-motion gate.
 * Tokens kept in sync with DESIGN.md. If you edit tokens here, update DESIGN.md too. */

:root {
  /* Surface */
  --paper: #F5EFDF;
  --paper-edge: #E9E0C8;
  --surface-card: #FBF6E8;

  /* Ink */
  --ink: #1B1B1B;
  --ink-soft: #3D3A33;
  --ink-faint: #6B6657;
  --rule: #221A15;

  /* Metric inks (the load-bearing semantic colors) */
  --air: #3F5160;
  --heat-index: #A45A2A;
  --wbgt: #702424;

  /* Link tokens */
  --accent-link: var(--wbgt);
  --accent-link-hover: #A45A2A;

  /* Type stacks (all self-hosted; no Google Fonts) */
  --font-display: "GT Sectra Display", "Spectral", "Charter", "Georgia", serif;
  --font-body: "Spectral", "Charter", "Georgia", serif;
  --font-mono: "IBM Plex Mono", "JetBrains Mono", ui-monospace, "Menlo", monospace;
  --font-ui: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;

  /* Type scale (rem; base 16 px) */
  --fs-hero:     clamp(2.75rem, 8vw, 5.5rem);
  --fs-h2:       clamp(1.75rem, 4vw, 2.5rem);
  --fs-body:     clamp(1.0625rem, 1.2vw, 1.1875rem);
  --fs-caption:  0.875rem;
  --fs-marginalia: 0.8125rem;

  /* Spacing (8-pt baseline) */
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 32px;
  --space-6: 48px;
  --space-8: 64px;
  --space-12: 96px;
  --space-16: 128px;

  /* Layout */
  --strip-h-mobile: 56px;
  --strip-h-desktop: 48px;
  --max-content: 64ch;
}

/* Reset / base */
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: 1.65;
  /* Account for the persistent strip at top */
  padding-top: var(--strip-h-mobile);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
@media (min-width: 768px) {
  body { padding-top: var(--strip-h-desktop); }
}

a { color: var(--accent-link); text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 0.15em; }
a:hover, a:focus-visible { color: var(--accent-link-hover); }

p { margin: 0 0 var(--space-3) 0; max-width: var(--max-content); }
h1, h2, h3 { font-family: var(--font-display); margin: 0 0 var(--space-3) 0; }
.chapter__title { font-size: var(--fs-h2); }
.chapter__title--hero { font-size: var(--fs-hero); line-height: 1.05; }

/* Chapter layout */
main { display: flex; flex-direction: column; }
.chapter {
  min-height: 100dvh;
  display: grid;
  place-items: center;
  padding: var(--space-12) var(--space-3);
  transition: opacity 0.4s ease;
  opacity: 0.55;
}
.chapter.is-active { opacity: 1.0; }
.chapter__inner {
  width: 100%;
  max-width: 80ch;
  margin: 0 auto;
}
.chapter__inner--hero { max-width: 100%; text-align: center; }

/* Hero numbers (Ch 0) */
.hero-numbers {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
  margin: var(--space-6) 0;
}
@media (min-width: 768px) { .hero-numbers { grid-template-columns: repeat(3, 1fr); } }
.hero-numbers__cell { display: flex; flex-direction: column; align-items: center; }
.hero-numbers__cell--air   { color: var(--air); }
.hero-numbers__cell--hi    { color: var(--heat-index); }
.hero-numbers__cell--wbgt  { color: var(--wbgt); }
.hero-numbers__value { font-family: var(--font-mono); font-size: clamp(3rem, 10vw, 6rem); line-height: 1; font-weight: 500; }
.hero-numbers__unit  { font-family: var(--font-mono); font-size: 0.4em; opacity: 0.7; }
.hero-numbers__label { font-family: var(--font-ui); font-size: var(--fs-caption); margin-top: var(--space-2); color: var(--ink-soft); text-align: center; }

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0s !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0s !important;
    scroll-behavior: auto !important;
  }
  .chapter { opacity: 1.0; transition: none; }
}

/* ---- Skip link (a11y; hidden until focused) ---- */

.skip-link {
  position: absolute;
  top: -100px;
  left: var(--space-2);
  background: var(--ink);
  color: var(--paper);
  padding: var(--space-2) var(--space-3);
  font-family: var(--font-ui);
  font-size: var(--fs-caption);
  text-decoration: none;
  z-index: 200;
  border-radius: 4px;
}
.skip-link:focus { top: var(--space-2); outline: 2px solid var(--wbgt); outline-offset: 2px; }

/* ---- Three-number strip (persistent top-of-viewport) ---- */

.strip {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--strip-h-mobile);
  background: var(--paper);
  border-bottom: 1px solid var(--paper-edge);
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  z-index: 100;
}
@media (min-width: 768px) { .strip { height: var(--strip-h-desktop); } }

.strip__cell {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  border-right: 1px solid var(--paper-edge);
  font-family: var(--font-ui);
  padding: 0 var(--space-3);
}
.strip__cell:last-child { border-right: none; }
.strip__label {
  font-size: 0.6875rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-faint);
}
.strip__value {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 500;
  color: var(--ink-faint);
  transition: color 0.4s ease;
}
@media (min-width: 768px) { .strip__value { font-size: 1.5rem; } }

/* Active-metric highlighting — the chapter's data-metric tells which cell is "live" */
.strip__cell--air   .strip__value { color: var(--ink-faint); }
.strip__cell--hi    .strip__value { color: var(--ink-faint); }
.strip__cell--wbgt  .strip__value { color: var(--ink-faint); }

.strip[data-active-metric="air"]  .strip__cell--air  .strip__value { color: var(--air); font-weight: 600; }
.strip[data-active-metric="heat-index"] .strip__cell--hi .strip__value { color: var(--heat-index); font-weight: 600; }
.strip[data-active-metric="wbgt"] .strip__cell--wbgt .strip__value { color: var(--wbgt); font-weight: 600; }
.strip[data-active-metric="all"]  .strip__value { color: var(--ink); }

/* ---- Unit toggle (persistent footer button) ---- */

.site-footer {
  position: fixed;
  bottom: 16px;
  right: 16px;
  z-index: 99;
}
.unit-toggle {
  font-family: var(--font-ui);
  font-size: 0.8125rem;
  background: var(--surface-card);
  color: var(--ink);
  border: 1px solid var(--paper-edge);
  border-radius: 6px;
  padding: 10px 14px;
  min-width: 44px;
  min-height: 44px;
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(0,0,0,0.06);
  transition: background-color 0.2s ease;
}
.unit-toggle:hover { background: var(--paper); }
.unit-toggle:focus-visible { outline: 2px solid var(--wbgt); outline-offset: 2px; }
.unit-toggle[aria-pressed="true"] { background: var(--ink-faint); color: var(--paper); }
.unit-toggle__alt { font-family: var(--font-mono); font-weight: 600; }

/* ---- Side dispatch (for Phase 3+) ---- */

.side-dispatch {
  background: var(--surface-card);
  border-left: 3px solid var(--ink-soft);
  padding: var(--space-3);
  margin: var(--space-4) 0;
  font-size: 0.9375rem;
}
.side-dispatch::before {
  content: "For practitioners.";
  font-family: var(--font-ui);
  font-size: 0.6875rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-faint);
  display: block;
  margin-bottom: var(--space-2);
}

/* ---- Citation chips (lazy-loaded source metadata on hover/focus) ---- */

cite.citation-chip {
  position: relative;
  font-style: normal;
  font-family: var(--font-mono);
  font-size: 0.75em;
  vertical-align: super;
  line-height: 1;
  background: var(--surface-card);
  color: var(--ink-soft);
  padding: 1px 5px;
  border-radius: 3px;
  border: 1px solid var(--paper-edge);
  cursor: help;
  margin: 0 2px;
  transition: background-color 0.15s ease;
}
cite.citation-chip:hover,
cite.citation-chip:focus-visible {
  background: var(--paper-edge);
  outline: none;
}
cite.citation-chip:focus-visible {
  box-shadow: 0 0 0 2px var(--wbgt);
}

.citation-chip__tip {
  position: absolute;
  bottom: calc(100% + 6px);
  left: 0;
  z-index: 50;
  display: none;
  width: max-content;
  max-width: min(360px, 80vw);
  padding: 10px 12px;
  background: var(--paper);
  color: var(--ink);
  border: 1px solid var(--rule);
  border-radius: 4px;
  box-shadow: 0 4px 14px rgba(0,0,0,0.15);
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-style: normal;
  line-height: 1.45;
  vertical-align: baseline;
  text-align: left;
  white-space: normal;
}
.citation-chip__tip.is-visible { display: block; }
.citation-chip__tip strong { font-family: var(--font-ui); font-size: 0.8125rem; text-transform: uppercase; letter-spacing: 0.04em; color: var(--ink-faint); display: block; margin-bottom: 4px; }
.citation-chip__tip a { font-size: 0.8125rem; word-break: break-all; }
.citation-chip__tip small { color: var(--ink-faint); font-size: 0.75rem; }

@media (prefers-reduced-motion: reduce) {
  cite.citation-chip { transition: none; }
}

/* ---- Chapter figures (embedded SVG diagrams in body prose) ---- */

.chapter-figure {
  margin: var(--space-6) 0;
  text-align: center;
}
.chapter-figure img {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 0 auto;
  background: var(--paper);
}
.chapter-figure figcaption {
  font-family: var(--font-ui);
  font-size: var(--fs-caption);
  color: var(--ink-soft);
  margin-top: var(--space-2);
  max-width: 64ch;
  margin-left: auto;
  margin-right: auto;
  font-style: italic;
}

/* Hero tag (Ch 0) */
.hero-tag {
  font-family: var(--font-display);
  font-size: clamp(1.25rem, 2.5vw, 1.625rem);
  color: var(--ink-soft);
  margin: var(--space-4) 0 var(--space-6) 0;
  font-style: italic;
}

/* Hero disclaimer (Ch 0) */
.hero-disclaimer {
  max-width: 60ch;
  margin: var(--space-4) auto 0 auto;
  padding: var(--space-3);
  background: var(--surface-card);
  border: 1px solid var(--paper-edge);
  font-size: 0.9375rem;
  color: var(--ink-soft);
  text-align: left;
}
.hero-disclaimer p { margin: 0 0 var(--space-2) 0; }
.hero-disclaimer p:last-child { margin-bottom: 0; }

/* ---- Ch 4 scenario flipper centerpiece ---- */

.chapter__inner--centerpiece { width: 100%; max-width: 92ch; }
.chapter__lede {
  font-family: var(--font-display);
  font-size: clamp(1.125rem, 1.6vw, 1.375rem);
  color: var(--ink-soft);
  margin: 0 0 var(--space-6) 0;
  font-style: italic;
  max-width: 56ch;
}

.scenario-flipper {
  background: var(--surface-card);
  border: 1px solid var(--paper-edge);
  border-radius: 8px;
  padding: var(--space-4);
  margin-bottom: var(--space-6);
}

.scenario-flipper__chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: var(--space-4);
}
.scenario-flipper__chip {
  font-family: var(--font-ui);
  font-size: 0.8125rem;
  background: var(--paper);
  color: var(--ink);
  border: 1px solid var(--paper-edge);
  border-radius: 6px;
  padding: 8px 12px;
  cursor: pointer;
  min-height: 44px;
  transition: background-color 0.15s ease;
}
.scenario-flipper__chip:hover { background: var(--paper-edge); }
.scenario-flipper__chip:focus-visible { outline: 2px solid var(--wbgt); outline-offset: 2px; }
.scenario-flipper__chip.is-active {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
}

.scenario-flipper__readout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
  padding: var(--space-3) 0;
  border-top: 1px solid var(--paper-edge);
  border-bottom: 1px solid var(--paper-edge);
  margin-bottom: var(--space-3);
}
@media (min-width: 640px) {
  .scenario-flipper__readout { grid-template-columns: repeat(3, 1fr); }
}
.scenario-flipper__cell { display: flex; flex-direction: column; align-items: center; }
.scenario-flipper__cell--air .scenario-flipper__value  { color: var(--air); }
.scenario-flipper__cell--hi  .scenario-flipper__value  { color: var(--heat-index); }
.scenario-flipper__cell--wbgt .scenario-flipper__value { color: var(--wbgt); }
.scenario-flipper__label {
  font-family: var(--font-ui);
  font-size: 0.6875rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin-bottom: 4px;
}
.scenario-flipper__value {
  font-family: var(--font-mono);
  font-size: clamp(2.5rem, 6vw, 3.5rem);
  line-height: 1;
  font-weight: 500;
}

.scenario-flipper__decision {
  font-family: var(--font-body);
  font-size: 0.9375rem;
  color: var(--ink);
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: baseline;
}
.scenario-flipper__decision-label { color: var(--ink-soft); }
.scenario-flipper__decision-value {
  font-family: var(--font-ui);
  font-weight: 600;
  color: var(--ink);
}
.scenario-flipper__decision-priority {
  font-family: var(--font-ui);
  font-size: 0.75rem;
  background: var(--heat-index);
  color: var(--paper);
  padding: 2px 8px;
  border-radius: 4px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.scenario-flipper__decision-citations {
  display: inline-flex;
  gap: 4px;
  align-items: baseline;
  margin-left: auto;
}

@media (prefers-reduced-motion: reduce) {
  .scenario-flipper__chip { transition: none; }
}

/* ---- Ch 5 divergence map ---- */

.divergence-map { margin-bottom: var(--space-6); }

.divergence-map__toggle {
  display: flex;
  gap: 8px;
  margin-bottom: var(--space-3);
}
.divergence-map__toggle button {
  font-family: var(--font-ui);
  font-size: 0.8125rem;
  background: var(--surface-card);
  color: var(--ink);
  border: 1px solid var(--paper-edge);
  border-radius: 6px;
  padding: 8px 12px;
  min-height: 44px;
  cursor: pointer;
  transition: background-color 0.15s ease;
}
.divergence-map__toggle button:hover { background: var(--paper-edge); }
.divergence-map__toggle button:focus-visible { outline: 2px solid var(--wbgt); outline-offset: 2px; }
.divergence-map__toggle button.is-active {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
}

.divergence-map__svg {
  width: 100%;
  height: auto;
  background: var(--paper);
  border: 1px solid var(--paper-edge);
  display: block;
}
.divergence-map__svg rect {
  cursor: crosshair;
  transition: stroke 0.1s ease;
}
.divergence-map__svg rect:hover {
  stroke: var(--ink);
  stroke-width: 1;
}

.divergence-map__legend {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-2);
  font-family: var(--font-ui);
  font-size: 0.8125rem;
  color: var(--ink-soft);
}
.divergence-map__legend-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.divergence-map__legend-item::before {
  content: "";
  display: inline-block;
  width: 12px;
  height: 12px;
  border-radius: 2px;
  flex-shrink: 0;
}
.divergence-map__legend-item--air::before   { background: var(--air); }
.divergence-map__legend-item--hi::before    { background: var(--heat-index); }
.divergence-map__legend-item--wbgt::before  { background: var(--wbgt); }
.divergence-map__legend-item--none::before  { background: var(--paper-edge); border: 1px solid var(--ink-faint); }

.divergence-map__readout {
  margin-top: var(--space-3);
  padding: var(--space-3);
  background: var(--surface-card);
  border: 1px solid var(--paper-edge);
  border-radius: 6px;
  min-height: 76px;
  font-family: var(--font-ui);
  font-size: 0.9375rem;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  align-items: baseline;
}
.divergence-map__readout-prompt { color: var(--ink-faint); font-style: italic; }
.divergence-map__readout-coords {
  font-family: var(--font-mono);
  font-size: 1.0625rem;
  color: var(--ink);
}
.divergence-map__readout-metric {
  font-family: var(--font-mono);
  font-size: 0.9375rem;
  color: var(--ink-soft);
}
.divergence-map__readout-metric .dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  margin-right: 4px;
  vertical-align: middle;
}
.divergence-map__readout-metric .dot--air   { background: var(--air); }
.divergence-map__readout-metric .dot--hi    { background: var(--heat-index); }
.divergence-map__readout-metric .dot--wbgt  { background: var(--wbgt); }
.divergence-map__readout-action {
  font-family: var(--font-ui);
  font-weight: 600;
  color: var(--ink);
  margin-left: auto;
}
/* Color-code the action call by dominant metric */
.divergence-map__readout-action--air        { color: var(--air); }
.divergence-map__readout-action--heat-index { color: var(--heat-index); }
.divergence-map__readout-action--wbgt       { color: var(--wbgt); }

@media (prefers-reduced-motion: reduce) {
  .divergence-map__svg rect { transition: none; }
  .divergence-map__toggle button { transition: none; }
}

/* ---- Ch 6 blind-spot cards ---- */

.blind-spot-cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
  margin-bottom: var(--space-6);
}
@media (min-width: 768px) {
  .blind-spot-cards { grid-template-columns: repeat(3, 1fr); }
}

.blind-spot-card {
  background: var(--surface-card);
  border: 1px solid var(--paper-edge);
  border-left-width: 4px;
  border-radius: 6px;
  padding: var(--space-3);
  outline: none;
  transition: box-shadow 0.15s ease;
}
.blind-spot-card:hover,
.blind-spot-card:focus-visible {
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.06);
}
.blind-spot-card:focus-visible {
  outline: 2px solid var(--wbgt);
  outline-offset: 2px;
}
.blind-spot-card--air        { border-left-color: var(--air); }
.blind-spot-card--heat-index { border-left-color: var(--heat-index); }
.blind-spot-card--wbgt       { border-left-color: var(--wbgt); }

.blind-spot-card__title {
  font-family: var(--font-display);
  font-size: 1.125rem;
  margin: 0 0 var(--space-2) 0;
  line-height: 1.3;
}
.blind-spot-card--air        .blind-spot-card__title { color: var(--air); }
.blind-spot-card--heat-index .blind-spot-card__title { color: var(--heat-index); }
.blind-spot-card--wbgt       .blind-spot-card__title { color: var(--wbgt); }

.blind-spot-card__items {
  margin: 0 0 var(--space-3) 0;
  padding-left: var(--space-3);
  font-size: 0.9375rem;
  color: var(--ink-soft);
  line-height: 1.55;
}
.blind-spot-card__items li { margin-bottom: 4px; }
.blind-spot-card__items li:last-child { margin-bottom: 0; }

.blind-spot-card__note {
  margin: 0;
  font-style: italic;
  font-size: 0.875rem;
  color: var(--ink-faint);
  line-height: 1.45;
}

@media (prefers-reduced-motion: reduce) {
  .blind-spot-card { transition: none; }
}

/* ---- Ch 7 mode toggle + sandbox calculator + live NWS panel ---- */

.ch7-mode-toggle {
  display: flex;
  gap: 8px;
  margin-bottom: var(--space-3);
}
.ch7-mode-toggle button {
  font-family: var(--font-ui);
  font-size: 0.875rem;
  background: var(--surface-card);
  color: var(--ink);
  border: 1px solid var(--paper-edge);
  border-radius: 6px;
  padding: 10px 16px;
  min-height: 44px;
  cursor: pointer;
  transition: background-color 0.15s ease;
}
.ch7-mode-toggle button:hover { background: var(--paper-edge); }
.ch7-mode-toggle button:focus-visible { outline: 2px solid var(--wbgt); outline-offset: 2px; }
.ch7-mode-toggle button.is-active {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
}

.sandbox, .live-nws {
  background: var(--surface-card);
  border: 1px solid var(--paper-edge);
  border-radius: 8px;
  padding: var(--space-4);
  margin-bottom: var(--space-4);
}

.sandbox__controls {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}
@media (min-width: 640px) {
  .sandbox__controls { grid-template-columns: repeat(2, 1fr); }
}

.sandbox__slider-label {
  font-family: var(--font-ui);
  font-size: 0.8125rem;
  color: var(--ink-soft);
  display: flex;
  justify-content: space-between;
  margin-bottom: 6px;
}
.sandbox__slider-value {
  font-family: var(--font-mono);
  color: var(--ink);
  font-weight: 500;
}
.sandbox__slider input[type="range"] {
  width: 100%;
  min-height: 32px;
  accent-color: var(--wbgt);
  cursor: pointer;
}

.sandbox__readout,
.live-nws__readout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
  padding: var(--space-3) 0;
  border-top: 1px solid var(--paper-edge);
  margin-top: var(--space-3);
}
@media (min-width: 640px) {
  .sandbox__readout,
  .live-nws__readout { grid-template-columns: repeat(3, 1fr); }
}

.sandbox__cell,
.live-nws__cell { display: flex; flex-direction: column; align-items: center; }

.sandbox__cell--air   .sandbox__value,
.live-nws__cell--air  .live-nws__value  { color: var(--air); }
.sandbox__cell--hi    .sandbox__value,
.live-nws__cell--hi   .live-nws__value  { color: var(--heat-index); }
.sandbox__cell--wbgt  .sandbox__value,
.live-nws__cell--wbgt .live-nws__value  { color: var(--wbgt); }

.sandbox__label,
.live-nws__label {
  font-family: var(--font-ui);
  font-size: 0.6875rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin-bottom: 4px;
}
.sandbox__value,
.live-nws__value {
  font-family: var(--font-mono);
  font-size: clamp(2rem, 5vw, 2.875rem);
  line-height: 1;
  font-weight: 500;
}

/* Live NWS panel controls */
.live-nws__controls {
  display: flex;
  gap: 8px;
  margin-bottom: var(--space-3);
}
.live-nws__input {
  flex: 1;
  font-family: var(--font-mono);
  font-size: 0.9375rem;
  background: var(--paper);
  color: var(--ink);
  border: 1px solid var(--paper-edge);
  border-radius: 6px;
  padding: 10px 12px;
  min-height: 44px;
}
.live-nws__input:focus {
  outline: 2px solid var(--wbgt);
  outline-offset: 2px;
}
.live-nws__submit {
  font-family: var(--font-ui);
  font-size: 0.875rem;
  background: var(--ink);
  color: var(--paper);
  border: 1px solid var(--ink);
  border-radius: 6px;
  padding: 10px 16px;
  min-height: 44px;
  cursor: pointer;
  transition: opacity 0.15s ease;
}
.live-nws__submit:hover { opacity: 0.85; }
.live-nws__submit:focus-visible { outline: 2px solid var(--wbgt); outline-offset: 2px; }

.live-nws__presets {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: var(--space-3);
}
.live-nws__preset {
  font-family: var(--font-ui);
  font-size: 0.8125rem;
  background: var(--paper);
  color: var(--ink);
  border: 1px solid var(--paper-edge);
  border-radius: 5px;
  padding: 6px 10px;
  cursor: pointer;
  transition: background-color 0.15s ease;
}
.live-nws__preset:hover { background: var(--paper-edge); }
.live-nws__preset:focus-visible { outline: 2px solid var(--wbgt); outline-offset: 2px; }

.live-nws__loading,
.live-nws__prompt,
.live-nws__error {
  font-family: var(--font-ui);
  font-size: 0.9375rem;
  color: var(--ink-soft);
  margin: var(--space-3) 0;
}
.live-nws__error { color: var(--wbgt); }

.live-nws__detect {
  display: inline-block;
  font-family: var(--font-ui);
  font-size: 0.9375rem;
  background: var(--ink);
  color: var(--paper);
  border: 1px solid var(--ink);
  border-radius: 5px;
  padding: 8px 14px;
  cursor: pointer;
  margin-bottom: var(--space-3);
  transition: background-color 0.15s ease;
}
.live-nws__detect:hover { background: var(--ink-soft); border-color: var(--ink-soft); }
.live-nws__detect:focus-visible { outline: 2px solid var(--wbgt); outline-offset: 2px; }

.live-nws__station {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--ink-faint);
  margin: var(--space-2) 0 var(--space-3) 0;
  letter-spacing: 0.01em;
}

.live-nws__meta {
  font-family: var(--font-ui);
  font-size: 0.8125rem;
  color: var(--ink-faint);
  margin: var(--space-3) 0;
  line-height: 1.5;
}

.live-nws__chart {
  margin-top: var(--space-3);
  border-top: 1px solid var(--paper-edge);
  padding-top: var(--space-3);
}
.live-nws__chart svg {
  width: 100%;
  max-width: 600px;
  display: block;
  margin: 0 auto;
  overflow: visible;
}

@media (prefers-reduced-motion: reduce) {
  .ch7-mode-toggle button,
  .live-nws__preset,
  .live-nws__submit { transition: none; }
}

/* ---- Colophon (closing footer at end of <main>) ---- */

.colophon {
  background: var(--paper);
  border-top: 1px solid var(--paper-edge);
  padding: var(--space-12) var(--space-3) var(--space-16) var(--space-3);
  font-family: var(--font-body);
  color: var(--ink-soft);
}
.colophon__inner {
  max-width: 80ch;
  margin: 0 auto;
}
.colophon__heading {
  font-family: var(--font-display);
  font-size: var(--fs-h2);
  color: var(--ink);
  margin: 0 0 var(--space-4) 0;
}
.colophon__subheading {
  font-family: var(--font-ui);
  font-size: 0.8125rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-faint);
  margin: var(--space-6) 0 var(--space-3) 0;
}
.colophon__disclaimer {
  background: var(--surface-card);
  border-left: 3px solid var(--wbgt);
  padding: var(--space-3);
  margin: 0 0 var(--space-4) 0;
}
.colophon__disclaimer p { margin: 0; font-size: 0.9375rem; }
.colophon__col { margin-bottom: var(--space-4); }
.colophon__refs {
  margin: 0;
  padding-left: var(--space-3);
  font-size: 0.9375rem;
}
.colophon__refs li { margin-bottom: 6px; }
.colophon__refs a {
  color: var(--accent-link);
  text-decoration-thickness: 1px;
}
.colophon__manifest code {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  background: var(--surface-card);
  padding: 1px 4px;
  border-radius: 3px;
  color: var(--ink);
}