html,
body {
  overflow-x: clip;
}

html {
  scroll-behavior: smooth;
  background: var(--color-paper);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--color-paper);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.65;
  text-rendering: optimizeLegibility;
  padding-block-end: 5.25rem;
}

img,
video {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration-thickness: var(--rule-hair);
  text-underline-offset: 0.18em;
}

button,
a,
summary,
[role="tab"] {
  -webkit-tap-highlight-color: transparent;
}

button,
input {
  font: inherit;
}

h1,
h2,
h3 {
  margin: 0;
  color: inherit;
  font-family: var(--font-display);
  font-style: normal;
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: -0.025em;
  overflow-wrap: anywhere;
  min-width: 0;
}

h2 {
  font-size: clamp(2rem, 3.5vw, var(--text-3xl));
}

h3 {
  font-size: var(--text-lg);
}

p,
dl,
figure {
  margin: 0;
}

p + p {
  margin-block-start: var(--space-md);
}

.shell {
  width: min(100%, var(--page-max));
  margin-inline: auto;
  padding-inline: var(--page-gutter);
}

.skip-link {
  position: fixed;
  inset-block-start: var(--space-sm);
  inset-inline-start: var(--space-sm);
  z-index: var(--z-tooltip);
  padding: var(--space-sm) var(--space-md);
  background: var(--color-paper);
  color: var(--color-ink);
  transform: translateY(-180%);
}

.skip-link:focus {
  transform: translateY(0);
}

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

.site-nav {
  position: fixed;
  inset-block-start: 0;
  inset-inline: 0;
  z-index: var(--z-sticky-nav);
  min-height: var(--banner-height);
  padding-block: 0;
  border-block-end: var(--rule-hair) solid var(--color-rule);
  background-color: var(--color-nav);
  color: var(--color-night-ink);
  backdrop-filter: saturate(1.2) blur(14px);
  transition: background-color var(--dur-mid) var(--ease-out), border-color var(--dur-mid) var(--ease-out), backdrop-filter var(--dur-mid) var(--ease-out);
}

.site-nav.is-floating {
  padding-block: var(--space-2xs);
  border-color: transparent;
  background-color: transparent;
  backdrop-filter: blur(0);
}

.nav-inner {
  width: calc(100% - (2 * var(--page-gutter)));
  max-width: var(--page-max);
  min-height: var(--banner-height);
  margin-inline: auto;
  padding: var(--space-sm) var(--space-md);
  display: flex;
  align-items: center;
  gap: var(--space-md);
  border: var(--rule-hair) solid transparent;
  border-radius: 0;
  background-color: transparent;
  backdrop-filter: blur(0);
  box-shadow: none;
  transform: translateY(0);
  transition: border-radius var(--dur-mid) var(--ease-out), border-color var(--dur-mid) var(--ease-out), background-color var(--dur-mid) var(--ease-out), backdrop-filter var(--dur-mid) var(--ease-out), box-shadow var(--dur-mid) var(--ease-out), transform var(--dur-mid) var(--ease-out);
}

.nav-inner > .button {
  display: none;
}

.site-nav.is-floating .nav-inner {
  max-width: 58rem;
  min-height: 3.25rem;
  padding-block: var(--space-2xs);
  border-color: var(--color-rule);
  border-radius: var(--radius-pill);
  background-color: var(--color-nav-solid);
  backdrop-filter: blur(18px);
  box-shadow: 0 var(--space-xs) var(--space-xl) var(--color-shadow);
  transform: translateY(var(--space-xs));
}

.wordmark {
  margin-inline-end: auto;
  font-family: var(--font-display);
  font-weight: 800;
  text-decoration: none;
  white-space: nowrap;
}

.desktop-links {
  display: none;
  align-items: center;
  gap: var(--space-md);
}

.desktop-links a,
.mobile-panel a,
.footer-links a,
.tabs button {
  white-space: nowrap;
}

.desktop-links a {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  font-size: var(--text-sm);
  text-decoration: none;
  border-block-end: var(--rule-hair) solid transparent;
}

.desktop-links a[aria-current="page"],
.desktop-links a:hover {
  border-color: var(--color-accent);
}

.menu-toggle,
.icon-button {
  min-width: 44px;
  min-height: 44px;
  padding: var(--space-xs) var(--space-sm);
  border: var(--rule-hair) solid var(--color-rule);
  border-radius: var(--radius-xs);
  background: var(--color-night-2);
  color: var(--color-night-ink);
  cursor: pointer;
}

.mobile-panel {
  position: fixed;
  inset-block-start: var(--banner-height);
  inset-inline: var(--space-md);
  z-index: var(--z-dropdown);
  display: grid;
  gap: var(--space-xs);
  padding: var(--space-md);
  border: var(--rule-hair) solid var(--color-rule);
  background: var(--color-night);
  color: var(--color-night-ink);
  opacity: 0;
  transform: translateY(calc(-1 * var(--space-xs)));
  pointer-events: none;
  transition: opacity var(--dur-short) var(--ease-out), transform var(--dur-short) var(--ease-out);
}

.mobile-panel.is-open {
  opacity: 1;
  transform: none;
  pointer-events: auto;
}

.mobile-panel a {
  min-height: 44px;
  display: flex;
  align-items: center;
  text-decoration: none;
  border-block-end: var(--rule-hair) solid var(--color-rule);
}

.button {
  position: relative;
  min-height: 46px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
  padding: var(--space-sm) var(--space-lg);
  border: var(--rule-hair) solid var(--color-ink);
  border-radius: var(--radius-xs);
  background: var(--color-paper);
  color: var(--color-ink);
  font-weight: 800;
  line-height: 1.2;
  text-decoration: none;
  white-space: nowrap;
  overflow: clip;
  cursor: pointer;
  transition: background-color var(--dur-short) var(--ease-out), color var(--dur-short) var(--ease-out), transform var(--dur-micro) var(--ease-out), border-color var(--dur-short) var(--ease-out), opacity var(--dur-short) var(--ease-out);
}

.button--primary {
  border-color: var(--color-action);
  background: var(--color-action);
  color: var(--color-action-ink);
}

.button--dark {
  border-color: var(--color-night);
  background: var(--color-night);
  color: var(--color-night-ink);
}

.button--large {
  min-height: 54px;
  padding-inline: var(--space-xl);
  font-size: var(--text-md);
}

.button--shine::after {
  content: "";
  position: absolute;
  inset: -50% auto -50% -45%;
  width: 22%;
  background: var(--color-paper);
  opacity: 0.42;
  transform: skewX(-18deg) translateX(-250%);
  animation: shine-once 2.8s var(--ease-out) 1.1s 1 both;
}

@keyframes shine-once {
  70%, 100% { transform: skewX(-18deg) translateX(850%); }
}

@media (hover: hover) and (pointer: fine) {
  .button:hover,
  .gallery-item:hover,
  .guide-card:hover {
    transform: translateY(calc(-1 * var(--space-3xs)));
  }
  .button--primary:hover {
    background: var(--color-gold);
    border-color: var(--color-gold);
  }
}

.button:active,
.gallery-item:active,
.guide-card:active,
.menu-toggle:active,
.icon-button:active {
  transform: translateY(var(--space-3xs));
}

.button[aria-disabled="true"],
.button:disabled,
.menu-toggle:disabled,
.icon-button:disabled,
.gallery-item:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

.button[data-state="loading"]::before {
  content: "";
  width: 1em;
  aspect-ratio: 1;
  border: var(--rule-hair) solid currentColor;
  border-block-start-color: transparent;
  border-radius: var(--radius-pill);
  animation: spin 0.9s linear infinite;
}

.button[data-state="error"] {
  border-color: var(--color-error);
}

.button[data-state="success"] {
  border-color: var(--color-success);
  background: var(--color-success);
  color: var(--color-success-ink);
}

@keyframes spin { to { transform: rotate(1turn); } }

.hero {
  position: relative;
  min-height: clamp(38rem, 78dvh, 52rem);
  display: grid;
  align-items: end;
  isolation: isolate;
  background: var(--color-night);
  color: var(--color-night-ink);
}

.hero-media,
.hero-media::after {
  position: absolute;
  inset: 0;
}

.hero-media {
  z-index: calc(var(--z-base) * -1);
  overflow: clip;
}

.hero-media::after {
  content: "";
  background: var(--color-overlay);
}

.hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 60% center;
  transform: translateY(var(--parallax-y, 0)) scale(1.03);
  animation: hero-breathe 18s var(--ease-in-out) 1 both;
}

@keyframes hero-breathe { to { transform: translateY(var(--parallax-y, 0)) scale(1.05); } }

.hero-inner {
  position: relative;
  display: grid;
  gap: var(--space-xl);
  padding-block: calc(var(--banner-height) + var(--space-xl)) var(--space-4xl);
}

.hero-copy {
  max-width: 47rem;
}

.tags,
.hero-actions,
.meta-row,
.tabs,
.footer-links,
.final-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
}

.tag {
  padding: var(--space-2xs) var(--space-sm);
  border: var(--rule-hair) solid var(--color-rule);
  border-radius: var(--radius-pill);
  background: var(--color-nav);
  color: var(--color-night-ink);
  font-size: var(--text-sm);
}

.hero h1 {
  margin-block-start: var(--space-md);
  font-size: var(--text-display);
  line-height: 1.03;
  text-wrap: balance;
}

.hero h1 small {
  display: block;
  margin-block-start: var(--space-xs);
  font-family: var(--font-body);
  font-size: var(--text-md);
  font-weight: 400;
  letter-spacing: 0.02em;
}

.hero-lede {
  max-width: 46rem;
  margin-block-start: var(--space-lg);
  font-size: clamp(1rem, 2vw, var(--text-md));
}

.hero-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-sm);
  margin-block-start: var(--space-lg);
}

.hero-facts div {
  padding-block: var(--space-sm);
  border-block-start: var(--rule-hair) solid var(--color-rule);
}

.hero-facts dt,
.info-grid dt,
.spec-list dt {
  color: var(--color-neutral);
  font-size: var(--text-sm);
}

.hero-facts dd,
.info-grid dd,
.spec-list dd {
  margin: 0;
  font-variant-numeric: tabular-nums;
  font-weight: 800;
}

.hero-actions {
  margin-block-start: var(--space-lg);
}

.dialogue-box {
  max-width: 42rem;
  padding: var(--space-md) var(--space-lg);
  border: var(--rule-hair) solid var(--color-gold);
  background: var(--color-nav-solid);
}

.dialogue-box b {
  color: var(--color-gold);
}

.info-strip {
  background: var(--color-night);
  color: var(--color-night-ink);
}

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

.info-grid div {
  min-width: 0;
  padding: var(--space-lg) var(--space-md);
  border-block-end: var(--rule-hair) solid var(--color-rule);
}

.section {
  padding-block: var(--space-2xl);
}

.section--tight {
  padding-block: var(--space-xl);
}

.section--paper-2 {
  background: var(--color-paper-2);
  color: var(--color-ink);
}

.section--night {
  background: var(--color-night);
  color: var(--color-night-ink);
}

.section-head {
  display: grid;
  gap: var(--space-sm);
  max-width: 48rem;
  margin-block-end: var(--space-xl);
}

.section-head p {
  max-width: 65ch;
  color: var(--color-muted);
}

.section--night .section-head p,
.section--night .muted {
  color: var(--color-rule);
}

.story-layout,
.media-split,
.download-layout,
.guide-layout {
  display: grid;
  gap: var(--space-xl);
}

.story-copy {
  max-width: 65ch;
  font-size: var(--text-md);
}

.story-visual img,
.media-figure img,
.media-figure video {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border: var(--rule-hair) solid var(--color-rule);
}

.media-figure figcaption,
.gallery-item figcaption {
  margin-block-start: var(--space-xs);
  color: var(--color-muted);
  font-size: var(--text-sm);
}

.feature-stack {
  display: grid;
  gap: var(--space-xl);
}

.feature-pinned {
  align-self: start;
}

.feature-pinned p {
  max-width: 38ch;
  margin-block-start: var(--space-md);
}

.feature-scroll {
  display: grid;
  gap: var(--space-xl);
}

.feature-scene {
  display: grid;
  gap: var(--space-md);
  padding-block-end: var(--space-lg);
  border-block-end: var(--rule-hair) solid var(--color-rule);
}

.feature-scene img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.features-ledger {
  display: grid;
  border-block-start: var(--rule-hair) solid var(--color-rule);
}

.feature-row {
  display: grid;
  gap: var(--space-sm);
  padding-block: var(--space-lg);
  border-block-end: var(--rule-hair) solid var(--color-rule);
}

.feature-row span {
  color: var(--color-success);
  font-weight: 800;
}

.gallery-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-md);
}

.gallery-item {
  min-width: 0;
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--color-ink);
  text-align: start;
  cursor: zoom-in;
  transition: transform var(--dur-short) var(--ease-out), opacity var(--dur-short) var(--ease-out);
}

.gallery-item[hidden] {
  display: none;
}

.gallery-item img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border: var(--rule-hair) solid var(--color-rule);
}

.gallery-item:nth-child(5n + 1) {
  grid-column: span 1;
}

.tabs {
  margin-block-end: var(--space-lg);
}

.tabs button {
  min-height: 44px;
  padding: var(--space-xs) var(--space-md);
  border: var(--rule-hair) solid var(--color-rule);
  background: var(--color-paper);
  color: var(--color-ink);
  cursor: pointer;
}

.tabs button[aria-selected="true"] {
  border-color: var(--color-accent);
  background: var(--color-accent);
  color: var(--color-accent-ink);
}

.download-card,
.guide-card,
.audience-note {
  padding: var(--space-lg);
  border-block-start: var(--rule-hair) solid var(--color-rule);
}

.download-card h3,
.guide-card h3 {
  margin-block-end: var(--space-sm);
}

.download-card .button,
.guide-card .button {
  margin-block-start: var(--space-md);
}

.guide-grid,
.download-cards,
.audience-grid {
  display: grid;
  gap: var(--space-lg);
}

.guide-card {
  display: block;
  color: inherit;
  text-decoration: none;
  transition: transform var(--dur-short) var(--ease-out), background-color var(--dur-short) var(--ease-out);
}

.guide-card:hover {
  background: var(--color-paper-2);
}

.route-diagram {
  display: grid;
  gap: var(--space-xs);
}

.route-node {
  padding: var(--space-md);
  border: var(--rule-hair) solid var(--color-rule);
  background: var(--color-paper);
}

.route-arrow {
  color: var(--color-accent);
  text-align: center;
  font-weight: 800;
}

.spec-list {
  display: grid;
  border-block-start: var(--rule-hair) solid var(--color-rule);
}

.spec-list div {
  display: grid;
  grid-template-columns: minmax(7rem, 0.7fr) minmax(0, 1.3fr);
  gap: var(--space-md);
  padding-block: var(--space-sm);
  border-block-end: var(--rule-hair) solid var(--color-rule);
}

.timeline,
.faq-list {
  border-block-start: var(--rule-hair) solid var(--color-rule);
}

details {
  border-block-end: var(--rule-hair) solid var(--color-rule);
}

summary {
  min-height: 54px;
  padding-block: var(--space-md);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  cursor: pointer;
  font-weight: 800;
  list-style: none;
}

summary::-webkit-details-marker {
  display: none;
}

summary::after {
  content: "+";
  flex: 0 0 auto;
  color: var(--color-accent);
  font-size: var(--text-lg);
}

details[open] summary::after {
  content: "−";
}

.details-body {
  max-width: 70ch;
  padding-block-end: var(--space-lg);
}

.notice {
  padding: var(--space-lg);
  border: var(--rule-hair) solid var(--color-gold);
  background: var(--color-night-2);
  color: var(--color-night-ink);
}

.notice strong {
  color: var(--color-gold);
}

.final-cta {
  position: relative;
  background: var(--color-night);
  color: var(--color-night-ink);
  overflow: clip;
}

.final-cta-inner {
  position: relative;
  z-index: var(--z-raised);
  padding-block: var(--space-3xl);
}

.final-cta h2 {
  max-width: 18ch;
}

.final-cta p {
  max-width: 52ch;
  margin-block: var(--space-md) var(--space-lg);
}

.fine-print {
  display: block;
  margin-block-start: var(--space-lg);
  color: var(--color-rule);
}

.site-footer {
  padding-block: var(--space-2xl);
  border-block-start: var(--rule-hair) solid var(--color-gold);
  background: var(--color-night);
  color: var(--color-night-ink);
}

.footer-statement {
  max-width: 70rem;
  font-size: var(--text-sm);
}

.footer-statement strong {
  font-family: var(--font-display);
  font-size: var(--text-lg);
}

.footer-links {
  margin-block: var(--space-lg);
}

.footer-links a {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  color: var(--color-night-ink);
}

.sticky-download {
  position: fixed;
  inset-inline: 0;
  inset-block-end: 0;
  z-index: var(--z-sticky-nav);
  min-height: 4.75rem;
  padding: var(--space-xs) max(var(--space-md), env(safe-area-inset-right)) max(var(--space-xs), env(safe-area-inset-bottom)) max(var(--space-md), env(safe-area-inset-left));
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm);
  border-block-start: var(--rule-hair) solid var(--color-gold);
  background: var(--color-nav-solid);
  color: var(--color-night-ink);
}

.sticky-download span {
  display: none;
}

.sticky-download .button {
  flex: 1;
}

.back-top {
  position: fixed;
  inset-inline-end: var(--space-md);
  inset-block-end: 6rem;
  z-index: var(--z-sticky);
  min-width: 44px;
  min-height: 44px;
  border: var(--rule-hair) solid var(--color-rule);
  border-radius: var(--radius-pill);
  background: var(--color-paper);
  color: var(--color-ink);
  cursor: pointer;
  opacity: 0;
  pointer-events: none;
  transform: translateY(var(--space-xs));
  transition: opacity var(--dur-short) var(--ease-out), transform var(--dur-short) var(--ease-out);
}

.back-top.is-visible {
  opacity: 1;
  pointer-events: auto;
  transform: none;
}

.lightbox {
  position: fixed;
  inset: 0;
  width: min(94%, 84rem);
  height: fit-content;
  max-height: 88dvh;
  margin: auto;
  padding: var(--space-md);
  border: var(--rule-hair) solid var(--color-rule);
  background: var(--color-night);
  color: var(--color-night-ink);
}

.lightbox::backdrop {
  background: var(--color-overlay);
}

.lightbox figure {
  display: grid;
  gap: var(--space-xs);
}

.lightbox img {
  width: 100%;
  max-height: 74dvh;
  object-fit: contain;
}

.lightbox-controls {
  display: flex;
  justify-content: space-between;
  gap: var(--space-xs);
  margin-block-start: var(--space-sm);
}

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

.article-hero {
  padding-block: calc(var(--banner-height) + var(--space-2xl)) var(--space-xl);
  background: var(--color-paper-2);
}

.article-hero h1 {
  max-width: 19ch;
  font-size: clamp(2.35rem, 5vw, 4.5rem);
}

.article-hero p {
  max-width: 60ch;
  margin-block-start: var(--space-md);
  font-size: var(--text-md);
}

.toc {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  margin-block-start: var(--space-lg);
}

.toc a {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  padding-inline: var(--space-sm);
  border: var(--rule-hair) solid var(--color-rule);
  text-decoration: none;
  white-space: nowrap;
}

.prose {
  max-width: 72ch;
}

.prose h2 {
  margin-block: var(--space-2xl) var(--space-md);
}

.prose h3 {
  margin-block: var(--space-xl) var(--space-sm);
}

.prose li + li {
  margin-block-start: var(--space-xs);
}

.prose table {
  width: 100%;
  border-collapse: collapse;
  font-variant-numeric: tabular-nums;
}

.prose th,
.prose td {
  padding: var(--space-sm);
  border-block-end: var(--rule-hair) solid var(--color-rule);
  text-align: start;
  vertical-align: top;
}

@media (min-width: 40rem) {
  .hero-facts,
  .info-grid,
  .gallery-grid,
  .guide-grid,
  .download-cards,
  .audience-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .gallery-item:nth-child(5n + 1) {
    grid-column: span 2;
  }
  .feature-row {
    grid-template-columns: minmax(10rem, 0.8fr) minmax(0, 1.4fr) auto;
    align-items: baseline;
  }
  .sticky-download span {
    display: block;
  }
  .sticky-download .button {
    flex: 0 0 auto;
  }
}

@media (min-width: 60rem) {
  body {
    padding-block-end: 0;
  }
  .desktop-links {
    display: flex;
  }
  .nav-inner > .button {
    display: inline-flex;
  }
  .menu-toggle,
  .mobile-panel {
    display: none;
  }
  .hero-inner {
    grid-template-columns: minmax(0, 1.3fr) minmax(18rem, 0.7fr);
    align-items: end;
  }
  .dialogue-box {
    justify-self: end;
  }
  .info-grid {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }
  .info-grid div {
    border-inline-end: var(--rule-hair) solid var(--color-rule);
  }
  .story-layout,
  .media-split,
  .download-layout,
  .guide-layout {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    align-items: start;
  }
  .feature-stack {
    grid-template-columns: minmax(16rem, 0.65fr) minmax(0, 1.35fr);
  }
  .feature-pinned {
    position: sticky;
    top: calc(var(--banner-height) + var(--space-xl));
    z-index: var(--z-sticky);
  }
  .gallery-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .gallery-item:nth-child(5n + 1) {
    grid-column: span 2;
  }
  .guide-grid {
    grid-template-columns: 1.15fr 0.85fr;
  }
  .sticky-download {
    inset-inline: auto var(--space-lg);
    inset-block-end: var(--space-lg);
    min-width: 28rem;
    border: var(--rule-hair) solid var(--color-gold);
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    animation-duration: 150ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 150ms !important;
  }
  .hero-media img {
    transform: scale(1.03) !important;
  }
}

@media (max-width: 39.999rem), (pointer: coarse) {
  .hero-media img {
    transform: scale(1.03);
  }
}