/* ==========================================================================
   GA Applications — Case Studies "Living Atlas"
   case-studies-collection.css
   Exhibition-index design system: near-black/graphite base, mineral-white
   reading surfaces, sparse cyan + acid-lime accents, mono coordinates.
   No webfonts are shipped; stacks resolve to licensed drop-ins when present
   (see INTEGRATION-README.md) and otherwise to strong system fallbacks.
   ========================================================================== */

:root {
  --ink: #101114;
  --graphite: #1c1e24;
  --graphite-2: #24262e;
  --graphite-3: #2e313a;
  --mineral: #f4f1ea;
  --mineral-2: #e9e5da;
  --fog: #b9bec6;
  --mute-dark: #565b64;
  --cyan: #00c2d8;
  --cyan-deep: #007483;
  --lime: #c8f04a;
  --lime-deep: #5d7013;
  --line: rgba(244, 241, 234, 0.14);
  --line-strong: rgba(244, 241, 234, 0.28);
  --line-light: rgba(16, 17, 20, 0.16);
  --line-light-strong: rgba(16, 17, 20, 0.34);
  --font-display: "Bricolage Grotesque", "Instrument Sans", "Geist", "Segoe UI",
    system-ui, -apple-system, sans-serif;
  --font-body: "Instrument Sans", "Geist", system-ui, -apple-system, "Segoe UI",
    Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "Geist Mono", ui-monospace, "SF Mono", SFMono-Regular, Menlo,
    Consolas, "Liberation Mono", monospace;
  --measure: 68ch;
  --pad: clamp(1.25rem, 4vw, 4rem);
  --maxw: 1560px;
  --ease: cubic-bezier(0.22, 0.61, 0.21, 1);
}

/* ---------------------------------------------------------------- reset */
*,
*::before,
*::after {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}
body {
  margin: 0;
  background: var(--ink);
  color: var(--mineral);
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.6;
  overflow-x: clip;
}
img {
  max-width: 100%;
  height: auto;
  display: block;
}
a {
  color: inherit;
}
h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.04;
  letter-spacing: -0.015em;
  margin: 0;
  text-wrap: balance;
}
p {
  margin: 0;
}
ul, ol {
  margin: 0;
  padding: 0;
  list-style: none;
}
button {
  font: inherit;
  color: inherit;
  cursor: pointer;
}
[hidden] {
  display: none !important;
}
:focus-visible {
  outline: 3px solid var(--lime);
  outline-offset: 3px;
  border-radius: 2px;
}
.light-band :focus-visible,
.ga-footer :focus-visible {
  outline-color: var(--cyan-deep);
}
::selection {
  background: var(--lime);
  color: var(--ink);
}

.visually-hidden {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0 0 0 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

.skip-link {
  position: absolute;
  inset-inline-start: 1rem;
  top: -4rem;
  z-index: 200;
  background: var(--lime);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  padding: 0.75rem 1.1rem;
  text-decoration: none;
  transition: top 0.18s var(--ease);
}
.skip-link:focus-visible {
  top: 0.75rem;
  outline-color: var(--ink);
}

/* Mono micro-label shared pattern */
.eyebrow,
.mono-tag {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

/* ==========================================================================
   Global GA header (one only; logo drop-in hook documented in README)
   ========================================================================== */
.ga-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(16, 17, 20, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.ga-header__inner {
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--pad);
  min-height: 68px;
  display: flex;
  align-items: center;
  gap: 1.25rem;
}
.ga-wordmark {
  display: inline-flex;
  align-items: baseline;
  gap: 0.45rem;
  text-decoration: none;
  font-family: var(--font-display);
  font-size: 1.22rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  min-height: 44px;
  align-items: center;
}
.ga-wordmark__ga {
  color: var(--lime);
}
.ga-wordmark__apps {
  color: var(--mineral);
}
.ga-wordmark::after {
  content: "";
  width: 2.1rem;
  height: 2px;
  background: var(--cyan);
  align-self: center;
  margin-inline-start: 0.35rem;
}
.ga-primary-nav {
  margin-inline-start: auto;
}
.ga-primary-nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: 0.15rem;
}
.ga-primary-nav a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0.35rem 0.7rem;
  text-decoration: none;
  font-size: 0.92rem;
  color: var(--fog);
  border-radius: 3px;
  transition: color 0.16s var(--ease), background 0.16s var(--ease);
}
.ga-primary-nav a:hover {
  color: var(--mineral);
  background: var(--graphite-2);
}
.ga-primary-nav a[aria-current="page"] {
  color: var(--lime);
}
.ga-header__actions {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-inline-start: 0.5rem;
}
.ga-maven {
  min-height: 44px;
  padding: 0.45rem 0.95rem;
  background: transparent;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  color: var(--mineral);
  font-size: 0.9rem;
  transition: border-color 0.16s var(--ease), color 0.16s var(--ease);
}
.ga-maven:hover {
  border-color: var(--cyan);
  color: var(--cyan);
}
.ga-start {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0.45rem 1.15rem;
  background: var(--lime);
  color: var(--ink);
  border-radius: 999px;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.92rem;
  transition: background 0.16s var(--ease);
}
.ga-start:hover {
  background: var(--mineral);
}
.ga-nav-toggle {
  display: none;
  min-height: 44px;
  min-width: 44px;
  margin-inline-start: auto;
  background: transparent;
  border: 1px solid var(--line-strong);
  border-radius: 4px;
  padding: 0.5rem 0.8rem;
  align-items: center;
  gap: 0.55rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.ga-nav-toggle__lines,
.ga-nav-toggle__lines::before,
.ga-nav-toggle__lines::after {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--mineral);
  content: "";
  transition: transform 0.18s var(--ease), opacity 0.18s var(--ease);
}
.ga-nav-toggle__lines::before {
  transform: translateY(-6px);
}
.ga-nav-toggle__lines::after {
  transform: translateY(4px);
}
.ga-header.nav-open .ga-nav-toggle__lines {
  background: transparent;
}
.ga-header.nav-open .ga-nav-toggle__lines::before {
  transform: translateY(1px) rotate(45deg);
}
.ga-header.nav-open .ga-nav-toggle__lines::after {
  transform: translateY(-1px) rotate(-45deg);
}
.ga-header__noscript {
  margin: 0;
  padding: 0.5rem var(--pad) 0.75rem;
  font-size: 0.9rem;
  color: var(--fog);
  border-top: 1px solid var(--line);
}
.ga-header__noscript a {
  color: var(--cyan);
}

/* ------------------------------------------------------- branch bar */
.branch-bar {
  background: var(--graphite);
  border-bottom: 1px solid var(--line);
}
.branch-bar ul {
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--pad);
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 1.6rem;
}
.branch-bar li {
  display: flex;
  align-items: center;
}
.branch-bar li + li::before {
  content: "";
  width: 4px;
  height: 4px;
  background: var(--cyan);
  margin-inline-end: 1.6rem;
  border-radius: 50%;
  opacity: 0.7;
}
.branch-bar a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0.35rem 0;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--fog);
}
.branch-bar a:hover {
  color: var(--mineral);
}
.branch-bar a[aria-current="page"] {
  color: var(--lime);
}
.branch-bar .branch-bar__cta {
  margin-inline-start: auto;
}
.branch-bar .branch-bar__cta a {
  color: var(--cyan);
}

/* ==========================================================================
   Hero
   ========================================================================== */
.hero {
  position: relative;
  border-bottom: 1px solid var(--line);
  background:
    linear-gradient(rgba(244, 241, 234, 0.035) 1px, transparent 1px) 0 0 / 100% 25%,
    var(--ink);
}
.hero__inner {
  max-width: var(--maxw);
  margin-inline: auto;
  padding: clamp(3rem, 7vh, 5.5rem) var(--pad) clamp(2.5rem, 5vh, 4rem);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.4rem;
}
.hero .eyebrow {
  color: var(--cyan);
  display: flex;
  align-items: center;
  gap: 0.8rem;
}
.hero .eyebrow::before {
  content: "";
  width: 2.6rem;
  height: 1px;
  background: var(--cyan);
}
.hero h1 {
  font-size: clamp(2.4rem, 5.4vw, 4.6rem);
  max-width: 15ch;
  color: var(--mineral);
}
.hero h1 em {
  font-style: normal;
  color: var(--lime);
}
.hero__lead {
  font-size: clamp(1.12rem, 1.6vw, 1.35rem);
  line-height: 1.55;
  max-width: var(--measure);
  color: var(--mineral);
}
.hero__support {
  max-width: var(--measure);
  color: var(--fog);
}
.hero__ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: 0.4rem;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  min-height: 48px;
  padding: 0.7rem 1.5rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.98rem;
  text-decoration: none;
  background: transparent;
  border: 1px solid transparent;
  transition: background 0.16s var(--ease), color 0.16s var(--ease),
    border-color 0.16s var(--ease), transform 0.16s var(--ease);
}
.btn--primary {
  background: var(--lime);
  color: var(--ink);
}
.btn--primary:hover {
  background: var(--mineral);
}
.btn--ghost {
  border-color: var(--line-strong);
  color: var(--mineral);
}
.btn--ghost:hover {
  border-color: var(--cyan);
  color: var(--cyan);
}
.fact-band {
  margin-top: clamp(1.6rem, 4vh, 2.6rem);
  border-top: 1px solid var(--line);
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
}
.fact-band li {
  padding: 1.1rem 1.2rem 1.15rem 0;
  border-right: 1px solid var(--line);
  margin-right: 1.2rem;
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}
.fact-band li:last-child {
  border-right: 0;
}
.fact-band strong {
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 3vw, 2.5rem);
  font-weight: 700;
  color: var(--mineral);
  line-height: 1;
}
.fact-band span {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--fog);
}

/* ==========================================================================
   Policy band (compact disclosure, before the explorer)
   ========================================================================== */
.policy-band {
  background: var(--graphite);
  border-bottom: 1px solid var(--line);
}
.policy-band__inner {
  max-width: var(--maxw);
  margin-inline: auto;
  padding: 1.1rem var(--pad);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.7rem 1.8rem;
}
.policy-band__mark {
  flex: 0 0 auto;
  width: 10px;
  height: 10px;
  background: var(--lime);
  border-radius: 50%;
}
.policy-band__text {
  font-size: 0.95rem;
  color: var(--mineral);
  max-width: 72ch;
}
.policy-band__links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1.4rem;
  margin-inline-start: auto;
}
.policy-band__links a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}
.policy-band__links a:hover {
  border-bottom-color: var(--cyan);
}

/* ==========================================================================
   Explorer
   ========================================================================== */
.explorer {
  position: relative;
  background: var(--ink);
  border-bottom: 1px solid var(--line);
}
.explorer__inner {
  max-width: var(--maxw);
  margin-inline: auto;
  padding: clamp(2.8rem, 6vh, 4.5rem) var(--pad);
}
.explorer__head {
  display: grid;
  gap: 0.9rem;
  margin-bottom: 2rem;
}
.explorer__head h2 {
  font-size: clamp(1.9rem, 3.4vw, 2.9rem);
}
.explorer__head p {
  color: var(--fog);
  max-width: var(--measure);
}
.explorer__head .eyebrow {
  color: var(--lime);
}

/* Controls */
.controls {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 1.6rem;
  align-items: flex-end;
  padding: 1.1rem 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  margin-bottom: 0.4rem;
}
.controls__filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.filter-btn {
  min-height: 44px;
  padding: 0.5rem 1.05rem;
  border-radius: 999px;
  border: 1px solid var(--line-strong);
  background: transparent;
  color: var(--fog);
  font-size: 0.92rem;
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  transition: color 0.16s var(--ease), border-color 0.16s var(--ease),
    background 0.16s var(--ease);
}
.filter-btn:hover {
  color: var(--mineral);
  border-color: var(--mineral);
}
.filter-btn__count {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  padding: 0.1rem 0.5rem;
  border-radius: 999px;
  background: var(--graphite-2);
  color: var(--mineral);
}
.filter-btn.is-active {
  background: var(--lime);
  border-color: var(--lime);
  color: var(--ink);
}
.filter-btn.is-active .filter-btn__count {
  background: var(--ink);
  color: var(--lime);
}
.controls__search {
  margin-inline-start: auto;
  display: grid;
  gap: 0.35rem;
  min-width: min(100%, 320px);
}
.controls__search label {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--fog);
}
.controls__search input {
  min-height: 48px;
  padding: 0.6rem 1rem;
  background: var(--graphite);
  border: 1px solid var(--line-strong);
  border-radius: 4px;
  color: var(--mineral);
  font: inherit;
  width: 100%;
}
.controls__search input::placeholder {
  color: var(--mute-dark);
}
.controls__search input:focus-visible {
  outline-color: var(--cyan);
  border-color: var(--cyan);
}
.atlas-status {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.06em;
  color: var(--fog);
  padding: 0.85rem 0;
}

/* Grid: index + stage */
.explorer__grid {
  display: grid;
  gap: clamp(1.5rem, 3vw, 3rem);
  align-items: start;
}
@media (min-width: 1100px) {
  .explorer__grid {
    grid-template-columns: minmax(0, 38fr) minmax(0, 62fr);
  }
}
@media (min-width: 700px) and (max-width: 1099.98px) {
  .explorer__grid {
    grid-template-columns: minmax(0, 45fr) minmax(0, 55fr);
  }
}

/* Index rows */
.atlas-index {
  border-top: 1px solid var(--line);
  counter-reset: atlas;
}
.atlas-row {
  border-bottom: 1px solid var(--line);
}
.atlas-row[hidden] {
  display: none;
}
.atlas-row__inner {
  display: grid;
  grid-template-columns: 3.4rem minmax(0, 1fr) auto 3.2rem;
  align-items: stretch;
  min-height: 84px;
  cursor: pointer;
  transition: background 0.16s var(--ease), color 0.16s var(--ease);
}
.atlas-row__seq {
  display: flex;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--cyan);
  padding-inline-start: 0.2rem;
  border-right: 1px solid var(--line);
}
.atlas-row__body {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 0.28rem;
  padding: 0.75rem 1rem;
  min-width: 0;
}
.atlas-row__name {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.08rem;
  line-height: 1.2;
  color: var(--mineral);
  transition: color 0.16s var(--ease);
}
.atlas-row__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem 0.9rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--fog);
}
.atlas-row__status {
  color: var(--fog);
}
.atlas-row__type {
  color: var(--cyan);
}
.atlas-row__type--alt {
  color: var(--lime);
}
.atlas-row__version {
  align-self: center;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  padding: 0.22rem 0.6rem;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  color: var(--mineral);
  white-space: nowrap;
}
.atlas-row__open {
  display: flex;
  align-items: center;
  justify-content: center;
  border-left: 1px solid var(--line);
  text-decoration: none;
  min-width: 44px;
  transition: background 0.16s var(--ease);
}
.atlas-row__arrow {
  font-size: 1.15rem;
  color: var(--fog);
  transition: transform 0.18s var(--ease), color 0.16s var(--ease);
}
.atlas-row__open:hover .atlas-row__arrow {
  transform: translateX(4px);
  color: var(--lime);
}
@media (hover: hover) {
  .atlas-row__inner:hover {
    background: var(--mineral);
  }
  .atlas-row__inner:hover .atlas-row__name {
    color: var(--ink);
  }
  .atlas-row__inner:hover .atlas-row__meta,
  .atlas-row__inner:hover .atlas-row__status {
    color: var(--mute-dark);
  }
  .atlas-row__inner:hover .atlas-row__seq {
    color: var(--cyan-deep);
    border-right-color: var(--line-light);
  }
  .atlas-row__inner:hover .atlas-row__open {
    border-left-color: var(--line-light);
  }
  .atlas-row__inner:hover .atlas-row__arrow {
    color: var(--ink);
  }
  .atlas-row__inner:hover .atlas-row__version {
    border-color: var(--line-light-strong);
    color: var(--ink);
  }
}
.atlas-row.is-selected .atlas-row__inner {
  background: var(--graphite-2);
  box-shadow: inset 4px 0 0 var(--lime);
}
.atlas-row.is-selected .atlas-row__name {
  color: var(--lime);
}

/* Inline (mobile) preview injected by JS */
.row-preview {
  border-bottom: 1px solid var(--line);
  background: var(--graphite);
  padding: 1.1rem 1rem 1.3rem;
  display: grid;
  gap: 0.9rem;
}
.row-preview[hidden] {
  display: none;
}
.row-preview img {
  width: 100%;
  border: 1px solid var(--line-strong);
  border-radius: 4px;
  background: var(--ink);
}
.row-preview__name {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
}
.row-preview__meta {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--fog);
  display: grid;
  gap: 0.25rem;
}
.row-preview .btn {
  justify-self: start;
}
.row-preview__series ul {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.row-preview__series a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0.4rem 0.9rem;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  text-decoration: none;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--mineral);
}
.row-preview__series a:hover {
  border-color: var(--lime);
  color: var(--lime);
}

/* Stage */
.atlas-stage {
  min-width: 0;
}
@media (min-width: 1100px) {
  .atlas-stage__sticky {
    position: sticky;
    top: 92px;
  }
}
.stage-frame {
  margin: 0;
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  overflow: hidden;
  background: var(--graphite);
}
.stage-frame__bar {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  padding: 0.55rem 0.9rem;
  border-bottom: 1px solid var(--line);
  background: var(--graphite-2);
}
.stage-frame__dots {
  display: inline-flex;
  gap: 6px;
}
.stage-frame__dots i {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--graphite-3);
}
.stage-frame__url {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--fog);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.stage-frame img {
  width: 100%;
  aspect-ratio: 1600 / 1000;
  background: var(--ink);
  transition: opacity 0.24s var(--ease);
}
.stage-frame.is-swapping img {
  opacity: 0.25;
}
.stage-meta {
  display: grid;
  gap: 0.55rem;
  padding: 1.2rem 0.2rem 0;
}
.stage-meta__eyebrow {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--cyan);
}
.stage-meta__name {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 2.4vw, 2.1rem);
  font-weight: 700;
  color: var(--mineral);
}
.stage-meta__version {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--lime);
}
.stage-meta__status {
  font-size: 0.95rem;
  color: var(--fog);
  border-inline-start: 3px solid var(--lime);
  padding-inline-start: 0.8rem;
}
.stage-meta__type {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--fog);
}
.stage-meta__action {
  padding-top: 0.5rem;
}
.stage-series {
  margin-top: 1rem;
  border-top: 1px solid var(--line);
  padding-top: 1rem;
  display: grid;
  gap: 0.7rem;
}
.stage-series__title {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--fog);
}
.stage-series ul {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 0.55rem;
}
.stage-series a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  min-height: 48px;
  padding: 0.55rem 0.85rem;
  border: 1px solid var(--line-strong);
  border-radius: 4px;
  text-decoration: none;
  font-family: var(--font-mono);
  font-size: 0.84rem;
  color: var(--mineral);
  transition: border-color 0.16s var(--ease), color 0.16s var(--ease);
}
.stage-series a:hover {
  border-color: var(--lime);
  color: var(--lime);
}
.stage-series a[aria-current="true"] {
  border-color: var(--cyan);
  color: var(--cyan);
}

/* Empty state + noscript */
.atlas-empty {
  border: 1px dashed var(--line-strong);
  border-radius: 6px;
  padding: 2rem;
  margin-top: 1.5rem;
  display: grid;
  gap: 1rem;
  justify-items: start;
  color: var(--fog);
}
.atlas-empty[hidden] {
  display: none;
}
.noscript-note {
  margin-top: 1.5rem;
  padding: 1rem 1.2rem;
  border: 1px solid var(--line);
  border-radius: 4px;
  color: var(--fog);
  font-size: 0.95rem;
}

/* Decorative coordinate cursor (JS, pointer-events none, reduced-motion off) */
.coord-cursor {
  position: absolute;
  z-index: 5;
  pointer-events: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  transform: translate(-50%, -50%);
  transition: opacity 0.2s var(--ease);
  opacity: 0;
}
.coord-cursor.is-live {
  opacity: 1;
}
.coord-cursor__dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--cyan);
}
.coord-cursor__label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  color: var(--cyan);
  background: rgba(16, 17, 20, 0.85);
  padding: 0.15rem 0.45rem;
  border: 1px solid var(--line);
  border-radius: 3px;
  white-space: nowrap;
}

/* ==========================================================================
   Motion Worlds bridge
   ========================================================================== */
.motion-bridge {
  background: var(--graphite);
  border-bottom: 1px solid var(--line);
}
.motion-bridge__inner {
  max-width: var(--maxw);
  margin-inline: auto;
  padding: clamp(2.8rem, 6vh, 4.5rem) var(--pad);
  display: grid;
  gap: 1.2rem;
}
.motion-bridge .eyebrow {
  color: var(--cyan);
}
.motion-bridge h2 {
  font-size: clamp(1.7rem, 3vw, 2.4rem);
}
.motion-bridge__intro {
  max-width: var(--measure);
  color: var(--fog);
}
.motion-bridge__intro strong {
  color: var(--mineral);
  font-weight: 600;
}
.motion-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  margin-top: 0.6rem;
}
@media (min-width: 620px) {
  .motion-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}
@media (min-width: 1020px) {
  .motion-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}
.motion-list li {
  background: var(--graphite);
}
.motion-list a {
  display: grid;
  gap: 0.5rem;
  align-content: start;
  min-height: 132px;
  padding: 1.1rem 1.2rem;
  text-decoration: none;
  transition: background 0.16s var(--ease);
}
.motion-list a:hover {
  background: var(--graphite-2);
}
.motion-list .motion-list__idx {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--cyan);
}
.motion-list .motion-list__name {
  font-family: var(--font-display);
  font-size: 1.06rem;
  font-weight: 600;
  color: var(--mineral);
  line-height: 1.25;
}
.motion-list .motion-list__go {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--fog);
}
.motion-list a:hover .motion-list__go {
  color: var(--lime);
}
.motion-bridge__more {
  margin-top: 0.4rem;
}
.motion-bridge__more a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}
.motion-bridge__more a:hover {
  border-bottom-color: var(--cyan);
}

/* ==========================================================================
   Light reading bands: policy panel, how-to-read, FAQ, project CTA
   ========================================================================== */
.light-band {
  background: var(--mineral);
  color: var(--ink);
  border-bottom: 1px solid var(--line-light);
}
.light-band__inner {
  max-width: var(--maxw);
  margin-inline: auto;
  padding: clamp(2.8rem, 6vh, 4.5rem) var(--pad);
  display: grid;
  gap: 1.15rem;
}
.light-band .eyebrow {
  color: var(--cyan-deep);
}
.light-band h2 {
  font-size: clamp(1.7rem, 3vw, 2.4rem);
  color: var(--ink);
}
.light-band p {
  max-width: var(--measure);
}
.light-band .lead-para {
  font-size: 1.12rem;
  line-height: 1.6;
}
.light-band a {
  color: var(--cyan-deep);
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
}
.light-band a:hover {
  color: var(--ink);
}
.policy-panel__lead {
  font-size: 1.08rem;
  border-inline-start: 3px solid var(--lime-deep);
  padding-inline-start: 1rem;
}
.policy-panel__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: 0.4rem;
}
.light-band .btn--ghost {
  border-color: var(--line-light-strong);
  color: var(--ink);
}
.light-band .btn--ghost:hover {
  border-color: var(--cyan-deep);
  color: var(--cyan-deep);
}
.light-band .btn--primary {
  background: var(--ink);
  color: var(--mineral);
}
.light-band .btn--primary:hover {
  background: var(--cyan-deep);
}

.reading dl,
.reading .reading__cols {
  max-width: var(--measure);
}
.reading__cols {
  display: grid;
  gap: 1.4rem;
}
@media (min-width: 900px) {
  .reading__cols {
    grid-template-columns: 1fr 1fr;
    max-width: none;
  }
  .reading__cols > * {
    max-width: var(--measure);
  }
}
.reading h3 {
  font-size: 1.18rem;
  margin-bottom: 0.4rem;
}
.reading__item {
  border-top: 1px solid var(--line-light);
  padding-top: 1rem;
}

.faq {
  display: grid;
  gap: 0;
  margin-top: 0.8rem;
  max-width: var(--measure);
}
.faq__item {
  border-top: 1px solid var(--line-light);
  padding: 1.1rem 0;
  display: grid;
  gap: 0.45rem;
}
.faq__item:last-child {
  border-bottom: 1px solid var(--line-light);
}
.faq__item h3 {
  font-size: 1.12rem;
  font-weight: 600;
}
.faq__item p {
  color: #33363d;
}

/* Project CTA */
.project-cta {
  background: var(--ink);
  border-bottom: 1px solid var(--line);
}
.project-cta__inner {
  max-width: var(--maxw);
  margin-inline: auto;
  padding: clamp(3rem, 7vh, 5rem) var(--pad);
  display: grid;
  gap: 1.1rem;
}
.project-cta .eyebrow {
  color: var(--lime);
}
.project-cta h2 {
  font-size: clamp(1.9rem, 3.6vw, 3rem);
  max-width: 22ch;
}
.project-cta p {
  max-width: var(--measure);
  color: var(--fog);
}
.project-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: 0.5rem;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.ga-footer {
  background: #0b0c0f;
  color: var(--fog);
}
.ga-footer__inner {
  max-width: var(--maxw);
  margin-inline: auto;
  padding: clamp(2.5rem, 6vh, 4rem) var(--pad) 2rem;
  display: grid;
  gap: 2.2rem;
}
.ga-footer__grid {
  display: grid;
  gap: 2rem;
}
@media (min-width: 820px) {
  .ga-footer__grid {
    grid-template-columns: 1.2fr 1fr 1fr;
  }
}
.ga-footer h2,
.ga-footer h3 {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  font-weight: 400;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--mineral);
  margin-bottom: 0.8rem;
}
.ga-footer__brand p {
  font-size: 0.92rem;
  max-width: 40ch;
}
.ga-footer__brand .ga-wordmark {
  margin-bottom: 0.7rem;
}
.ga-footer__links {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.1rem 1.2rem;
}
.ga-footer__links a {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  color: var(--fog);
  text-decoration: none;
  font-size: 0.94rem;
}
.ga-footer__links a:hover {
  color: var(--lime);
}
.ga-footer__contact p {
  margin-bottom: 0.55rem;
  font-size: 0.94rem;
}
.ga-footer__contact a {
  color: var(--cyan);
  text-decoration: none;
}
.ga-footer__contact a:hover {
  text-decoration: underline;
}
.ga-footer__concept-note {
  max-width: 86ch;
  margin-top: clamp(1.5rem, 3vw, 2.5rem);
  padding-top: 1.2rem;
  border-top: 1px solid var(--line);
  color: var(--fog);
  font-size: 0.84rem;
  line-height: 1.65;
}
.ga-footer__concept-note p {
  margin: 0;
}
.ga-footer__concept-note strong {
  color: var(--mineral);
}
.ga-footer__concept-note a {
  color: var(--cyan);
  text-underline-offset: 3px;
}
.ga-footer__legal {
  border-top: 1px solid var(--line);
  padding-top: 1.4rem;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.05em;
  color: var(--mute-dark);
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1.6rem;
}

/* ==========================================================================
   Responsive behaviour
   ========================================================================== */
@media (max-width: 1080px) {
  .ga-primary-nav,
  .ga-header__actions {
    display: none;
  }
  .ga-nav-toggle {
    display: inline-flex;
  }
  .ga-header.nav-open .ga-primary-nav,
  .ga-header.nav-open .ga-header__actions {
    display: flex;
  }
  .ga-header.nav-open .ga-header__inner {
    flex-wrap: wrap;
    padding-bottom: 0.9rem;
  }
  .ga-header.nav-open .ga-primary-nav {
    order: 3;
    flex-basis: 100%;
    margin-inline-start: 0;
    border-top: 1px solid var(--line);
    padding-top: 0.6rem;
  }
  .ga-header.nav-open .ga-primary-nav ul {
    flex-direction: column;
    gap: 0;
  }
  .ga-header.nav-open .ga-primary-nav a {
    width: 100%;
    font-size: 1rem;
  }
  .ga-header.nav-open .ga-header__actions {
    order: 4;
    flex-basis: 100%;
    margin-inline-start: 0;
    padding-top: 0.4rem;
  }
}

@media (max-width: 1099.98px) {
  .fact-band {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .fact-band li:nth-child(2n) {
    border-right: 0;
  }
  .fact-band li {
    padding-bottom: 0.9rem;
  }
}

@media (max-width: 699.98px) {
  body {
    font-size: 1rem;
  }
  .atlas-stage {
    display: none;
  }
  .fact-band {
    grid-template-columns: 1fr 1fr;
    gap: 0;
  }
  .fact-band li {
    margin-right: 0.8rem;
  }
  .controls__search {
    margin-inline-start: 0;
    width: 100%;
  }
  .atlas-row__inner {
    grid-template-columns: 2.6rem minmax(0, 1fr) auto 2.9rem;
    min-height: 92px;
  }
  .atlas-row__meta {
    gap: 0.2rem 0.6rem;
  }
  .branch-bar ul {
    gap: 0.25rem 1rem;
  }
  .branch-bar li + li::before {
    margin-inline-end: 1rem;
  }
  .branch-bar .branch-bar__cta {
    margin-inline-start: 0;
    flex-basis: 100%;
  }
}

@media (max-width: 380px) {
  .atlas-row__inner {
    grid-template-columns: 2.2rem minmax(0, 1fr) auto 2.6rem;
  }
  .hero__ctas .btn {
    width: 100%;
  }
}

/* ==========================================================================
   Reduced motion: remove decorative motion, keep every state readable
   ========================================================================== */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
  .coord-cursor {
    display: none;
  }
  .stage-frame img {
    transition: none;
  }
}