/* Porta · genre: quiet technical confidence · macrostructure: Guided Product Tour
 * variation: centered product promise · six-scene case-led product proof · governed product truth
 * pre-emit critique: P5 H5 E5 S5 R5 V5
 * theme: Porta quiet control room · studied-DNA (Otty restraint + Orca product evidence)
 * display/body: Porta Sans · technical: Porta Pixel Code
 * imagery: App-faithful code demo + explicit playable artifact + governed product captures, never generated UI
 * nav: N9 edge-aligned minimal · footer: Ft2 inline rule
 * contrast: pass (46–50) · slop: pass (51–55) · honest: pass (56)
 * chrome: pass (57) · tokens: pass (58) · responsive/mobile: pass (36, 59, 61–69) · icons: pass (60)
 */
@import url("/tokens.css");

@font-face {
  font-family: "Porta Sans";
  src: url("/fonts/PortaSans-Variable.woff2") format("woff2-variations");
  font-display: swap;
  font-style: normal;
  font-weight: 100 900;
}

@font-face {
  font-family: "Porta Pixel Code";
  src: url("/fonts/PixelCode-Regular.woff2") format("woff2");
  font-display: swap;
  font-style: normal;
  font-weight: 400;
}

@font-face {
  font-family: "Porta Pixel Code";
  src: url("/fonts/PixelCode-Medium.woff2") format("woff2");
  font-display: swap;
  font-style: normal;
  font-weight: 500;
}

:root {
  --site-gutter: max(var(--page-gutter), env(safe-area-inset-left), env(safe-area-inset-right));
  --site-min-width: 20rem;
  --site-logo-size: 1.75rem;
  --site-status-size: 0.5rem;
  --site-rule-width: var(--line-hair);
  --site-menu-width: 15rem;
  --site-table-min-width: 42rem;
  --site-growth-media-ratio: 4 / 5;
  --site-demo-media-ratio: 11 / 18;
  font-family: var(--font-body);
  font-synthesis: none;
  text-rendering: optimizeLegibility;
}

* {
  box-sizing: border-box;
}

html,
body {
  overflow-x: clip;
}

html {
  background: var(--color-paper);
  scroll-behavior: smooth;
  scrollbar-color: var(--color-rule-strong) var(--color-paper);
  scrollbar-width: thin;
}

::-webkit-scrollbar {
  width: var(--space-2xs);
  height: var(--space-2xs);
}

::-webkit-scrollbar-track {
  background: var(--color-paper);
}

::-webkit-scrollbar-thumb {
  border: var(--space-3xs) solid var(--color-paper);
  border-radius: var(--radius-pill);
  background: var(--color-rule-strong);
}

body {
  min-width: var(--site-min-width);
  margin: 0;
  padding-bottom: env(safe-area-inset-bottom);
  background: var(--color-paper);
  color: var(--color-ink);
  font-feature-settings: "calt" 1, "kern" 1, "liga" 1;
  font-family: var(--font-body);
  font-kerning: normal;
  font-optical-sizing: auto;
  font-size: var(--text-body);
  font-weight: var(--weight-regular);
  letter-spacing: var(--tracking-body);
  line-height: var(--leading-body);
  -moz-osx-font-smoothing: grayscale;
  -webkit-font-smoothing: antialiased;
}

html[lang="zh-CN"] body {
  font-family: var(--font-cjk);
  letter-spacing: 0;
}

::selection {
  background: var(--color-selection);
  color: var(--color-ink);
}

a {
  color: inherit;
  text-decoration-color: var(--color-rule-strong);
  text-decoration-thickness: var(--site-rule-width);
  text-underline-offset: var(--underline-offset);
  transition: color var(--dur-short) var(--ease-out), transform var(--dur-micro) var(--ease-out), text-decoration-color var(--dur-short) var(--ease-out);
}

a:hover {
  color: var(--color-ink);
  text-decoration-color: var(--color-accent-line);
}

.ui-icon,
.site-ui-icon,
.demo-ui-icon {
  display: block;
  flex: 0 0 auto;
  width: 1em;
  height: 1em;
}

.site-ui-icon {
  width: 0.875rem;
  height: 0.875rem;
}

a:focus-visible,
button:focus-visible,
summary:focus-visible,
.comparison-table-wrap:focus-visible {
  outline: var(--line-focus) solid var(--color-focus);
  outline-offset: var(--space-3xs);
}

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

main {
  display: block;
}

:where(main, section)[id] {
  scroll-margin-top: calc(var(--nav-height) + var(--space-xl));
}

.site-header {
  position: sticky;
  z-index: var(--z-sticky);
  top: 0;
  padding: max(var(--space-xs), env(safe-area-inset-top)) var(--site-gutter) 0;
  background: color-mix(in oklch, var(--color-paper) 90%, transparent);
  backdrop-filter: blur(var(--space-sm));
  pointer-events: none;
}

.site-nav {
  display: flex;
  width: min(100%, var(--content-max));
  min-height: var(--nav-height);
  margin-inline: auto;
  padding: 0;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2xs);
  border-bottom: var(--site-rule-width) solid var(--color-rule);
  background: transparent;
  pointer-events: auto;
}

.site-brand {
  display: inline-flex;
  min-height: var(--touch-height);
  padding-inline: var(--space-2xs);
  align-items: center;
  gap: var(--space-2xs);
  color: var(--color-ink);
  font-family: var(--font-technical);
  font-size: var(--text-small);
  font-weight: var(--weight-medium);
  letter-spacing: -0.03em;
  line-height: var(--leading-control);
  text-decoration: none;
  white-space: nowrap;
}

.site-brand:hover {
  color: var(--color-ink);
}

.site-brand img {
  width: var(--site-logo-size);
  height: var(--site-logo-size);
  border-radius: var(--radius-control);
}

.site-nav-actions,
.site-nav-links {
  display: flex;
  min-width: 0;
  align-items: center;
  gap: var(--space-3xs);
}

.site-nav-links {
  display: none;
}

.site-nav-links a,
.site-menu-panel a {
  display: flex;
  min-height: var(--touch-height);
  padding-inline: var(--space-xs);
  align-items: center;
  color: var(--color-ink-2);
  font-size: var(--text-small);
  line-height: var(--leading-control);
  text-decoration: none;
}

.site-nav-links a:hover,
.site-nav-links a[aria-current="page"],
.site-menu-panel a:hover,
.site-menu-panel a[aria-current="page"] {
  color: var(--color-ink);
}

.site-nav-links a[aria-current="page"],
.site-menu-panel a[aria-current="page"] {
  text-decoration-color: var(--color-accent);
  text-decoration-line: underline;
}

.site-nav .nav-cta,
.desktop-language-link {
  display: none;
}

.site-menu {
  position: relative;
}

.site-menu summary {
  display: inline-flex;
  min-height: var(--touch-height);
  padding-inline: var(--space-xs);
  align-items: center;
  gap: var(--space-2xs);
  border: var(--site-rule-width) solid var(--color-rule);
  border-radius: var(--radius-pill);
  color: var(--color-ink-2);
  cursor: pointer;
  font-size: var(--text-small);
  list-style: none;
}

.site-menu summary::-webkit-details-marker {
  display: none;
}

.site-menu[open] summary {
  border-color: var(--color-rule-strong);
  color: var(--color-ink);
}

.site-menu-chevron {
  transition: transform var(--dur-short) var(--ease-out);
}

.site-menu[open] .site-menu-chevron {
  transform: rotate(180deg);
}

.site-menu-panel {
  position: absolute;
  z-index: var(--z-sticky);
  inset-block-start: calc(100% + var(--space-2xs));
  inset-inline-end: 0;
  display: grid;
  width: min(var(--site-menu-width), calc(100vw - (var(--site-gutter) * 2)));
  padding: var(--space-2xs);
  border: var(--site-rule-width) solid var(--color-rule-strong);
  border-radius: var(--radius-panel);
  background: var(--color-paper-2);
  box-shadow: var(--shadow-stage);
}

.language-link,
.nav-cta,
.button-link,
.text-link,
.site-footer-links a {
  white-space: nowrap;
}

.language-link {
  min-height: var(--touch-height);
  padding-inline: var(--space-sm);
  align-items: center;
  color: var(--color-ink-2);
  font-size: var(--text-small);
  line-height: var(--leading-control);
  text-decoration: none;
}

.nav-cta,
.button-link {
  display: inline-flex;
  min-height: var(--control-height);
  padding-inline: var(--space-md);
  align-items: center;
  justify-content: center;
  gap: var(--space-2xs);
  border: var(--site-rule-width) solid var(--color-ink);
  border-radius: var(--radius-pill);
  background: var(--color-ink);
  color: var(--color-paper);
  font-size: var(--text-small);
  font-weight: var(--weight-medium);
  line-height: var(--leading-control);
  text-decoration: none;
  transition: background-color var(--dur-short) var(--ease-out), color var(--dur-short) var(--ease-out), transform var(--dur-micro) var(--ease-out);
}

.nav-cta:hover,
.button-link:hover {
  background: var(--color-accent-strong);
  color: var(--color-accent-ink);
  transform: translateY(calc(var(--site-rule-width) * -1));
}

.nav-cta:active,
.button-link:active {
  transform: translateY(var(--site-rule-width));
}

.nav-cta[aria-disabled="true"],
.button-link[aria-disabled="true"] {
  opacity: var(--opacity-disabled);
  cursor: not-allowed;
  pointer-events: none;
}

.text-link {
  display: inline-flex;
  min-height: var(--touch-height);
  align-items: center;
  gap: var(--space-2xs);
  color: var(--color-ink-2);
  font-size: var(--text-small);
  font-weight: var(--weight-medium);
  line-height: var(--leading-control);
}

.text-link .site-ui-icon {
  color: var(--color-accent);
  transition: transform var(--dur-micro) var(--ease-out);
}

.text-link:hover .site-ui-icon {
  transform: translateX(var(--space-3xs));
}

.hero,
.section,
.page-hero,
.document,
.simple-page {
  width: min(calc(100% - (var(--site-gutter) * 2)), var(--content-max));
  margin-inline: auto;
}

.hero {
  padding-block: clamp(var(--space-xl), 7vw, var(--space-3xl)) clamp(var(--space-3xl), 9vw, var(--space-4xl));
}

.hero-layout {
  display: grid;
  min-width: 0;
  gap: clamp(var(--space-2xl), 8vw, var(--space-4xl));
}

.hero-copy-panel {
  max-width: 44rem;
  align-self: center;
  animation: hero-settle var(--dur-long) var(--ease-out) both;
}

.hero h1,
.page-hero h1 {
  min-width: 0;
  margin: 0;
  overflow-wrap: anywhere;
  font-family: var(--font-display);
  font-size: var(--text-display);
  font-weight: var(--weight-medium);
  letter-spacing: var(--tracking-display);
  line-height: var(--leading-tight);
  text-wrap: balance;
}

.hero h1 {
  max-width: 12ch;
}

.hero h1 span,
.hero h1 strong {
  display: block;
}

.hero h1 strong {
  position: relative;
  margin-top: var(--space-2xs);
  font-weight: var(--weight-medium);
}

.hero h1 strong::after {
  display: block;
  width: var(--space-xl);
  height: var(--site-rule-width);
  margin-top: var(--space-md);
  background: var(--color-accent);
  content: "";
}

.section-index,
.chapter-label,
.page-kicker,
.workflow-step-label {
  color: var(--color-ink-3);
  font-family: var(--font-technical);
  font-size: var(--text-micro);
  font-weight: var(--weight-medium);
  letter-spacing: var(--tracking-label);
  line-height: var(--leading-control);
}

.section-index,
.chapter-label,
.page-kicker {
  margin: 0 0 var(--space-md);
}

.chapter-label {
  color: var(--color-accent-strong);
}

.hero-copy,
.page-summary {
  max-width: 58ch;
  margin: var(--space-lg) 0 0;
  color: var(--color-ink-2);
  font-size: var(--text-lede);
  line-height: 1.55;
  text-wrap: pretty;
}

.hero-actions {
  display: flex;
  margin-top: var(--space-lg);
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-sm) var(--space-md);
}

.hero-context {
  display: flex;
  margin: clamp(var(--space-lg), 6vw, var(--space-xl)) 0 0;
  padding-top: var(--space-sm);
  flex-wrap: wrap;
  gap: var(--space-xs) var(--space-md);
  border-top: var(--site-rule-width) solid var(--color-rule);
  color: var(--color-ink-3);
  font-family: var(--font-technical);
  font-size: var(--text-micro);
  line-height: var(--leading-body);
}

.hero-lifecycle {
  position: relative;
  display: grid;
  max-width: 34rem;
  margin: var(--space-lg) auto 0;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  color: var(--color-ink-3);
  font-family: var(--font-technical);
  font-size: var(--text-micro);
  letter-spacing: var(--tracking-label);
}

.hero-lifecycle::before,
.hero-lifecycle::after {
  position: absolute;
  inset-block-start: var(--lifecycle-line-top);
  inset-inline-start: 12.5%;
  width: 75%;
  height: var(--site-rule-width);
  background: var(--color-rule-strong);
  content: "";
}

.hero-lifecycle::after {
  background: var(--color-accent-line);
  transform: scaleX(0);
  transform-origin: left;
  animation: lifecycle-trace var(--dur-lifecycle) var(--ease-in-out) var(--dur-lifecycle-delay) both;
}

.hero-lifecycle span {
  position: relative;
  z-index: var(--z-base);
  display: grid;
  place-items: start center;
  gap: var(--space-2xs);
  text-align: center;
}

.hero-lifecycle i {
  width: var(--lifecycle-node-size);
  height: var(--lifecycle-node-size);
  border: var(--site-rule-width) solid var(--color-rule-strong);
  border-radius: var(--radius-pill);
  background: var(--color-paper);
  animation: lifecycle-node var(--dur-lifecycle) var(--ease-out) calc(var(--dur-lifecycle-delay) + (var(--lifecycle-index) * var(--dur-lifecycle-stagger))) both;
}

.terminal-status {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: var(--space-2xs);
  color: var(--color-accent-strong);
  white-space: nowrap;
}

.terminal-status::before {
  width: var(--site-status-size);
  height: var(--site-status-size);
  border-radius: var(--radius-pill);
  background: var(--color-accent);
  box-shadow: var(--shadow-status);
  content: "";
}

.terminal-status::after {
  position: absolute;
  inset-inline-start: 0;
  width: var(--site-status-size);
  height: var(--site-status-size);
  border: var(--site-rule-width) solid var(--color-accent);
  border-radius: var(--radius-pill);
  animation: status-pulse var(--dur-status) var(--ease-out) infinite;
  content: "";
  pointer-events: none;
}

.demo-app-bar i,
.demo-live-label i,
.demo-running-dot,
.demo-preview-record footer i {
  width: var(--site-status-size);
  height: var(--site-status-size);
  border-radius: var(--radius-pill);
  background: var(--demo-app-accent);
  box-shadow: var(--shadow-status);
}

.product-shot {
  display: block;
  width: 100%;
  height: 100%;
  max-width: none;
  background: var(--color-paper);
  object-fit: contain;
}

.product-shot-crop {
  object-fit: cover;
  object-position: center top;
}

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

.section-heading {
  max-width: var(--copy-max);
  margin-bottom: var(--space-2xl);
}

.section-index {
  margin-bottom: var(--space-sm);
}

.section-heading h2,
.thesis-copy h2,
.principle-statement h2,
.download-copy h2 {
  min-width: 0;
  margin: 0;
  overflow-wrap: anywhere;
  font-family: var(--font-display);
  font-size: var(--text-section-title);
  font-weight: var(--weight-medium);
  letter-spacing: var(--tracking-heading);
  line-height: var(--leading-heading);
  text-wrap: balance;
}

.section-heading > p,
.thesis-copy > p,
.principle-intro > p:not(.section-index),
.download-copy > p,
.download-requirements li {
  color: var(--color-ink-2);
}

.section-heading > p,
.thesis-copy > p,
.principle-intro > p:not(.section-index),
.download-copy > p {
  max-width: 54ch;
  margin: var(--space-md) 0 0;
  text-wrap: pretty;
}

.thesis-section {
  display: grid;
  padding-block: clamp(var(--space-3xl), 11vw, var(--space-4xl));
  gap: 0;
  border-block: var(--site-rule-width) solid var(--color-rule);
}

.thesis-copy h2 {
  max-width: 20ch;
}

.thesis-copy > p {
  max-width: 48ch;
}

.workflow-heading h2 {
  max-width: 18ch;
}

.workflow-section {
  position: relative;
  padding-top: var(--space-lg);
}

.workflow-heading {
  position: relative;
  margin-bottom: var(--space-2xl);
}

.workflow-heading::after {
  display: block;
  width: var(--space-xl);
  height: var(--site-rule-width);
  margin-top: var(--space-lg);
  background: var(--color-accent);
  content: "";
}

.product-demo {
  display: grid;
  min-width: 0;
  gap: var(--space-lg);
}

.product-demo-tabs {
  display: flex;
  min-width: 0;
  margin: 0 calc(var(--site-gutter) * -1);
  padding-inline: var(--site-gutter);
  overflow-x: auto;
  border-block: var(--site-rule-width) solid var(--color-rule);
  scrollbar-width: none;
  scroll-snap-type: x proximity;
}

.product-demo-tabs::-webkit-scrollbar {
  display: none;
}

.product-demo-tab {
  position: relative;
  display: grid;
  flex: 0 0 min(44vw, 10.5rem);
  min-width: 0;
  min-height: calc(var(--touch-height) + var(--space-lg));
  margin: 0;
  padding: var(--space-sm) var(--space-sm) var(--space-md);
  align-content: start;
  gap: var(--space-xs);
  border: 0;
  border-inline-end: var(--site-rule-width) solid var(--color-rule);
  border-radius: 0;
  background: transparent;
  color: var(--color-ink-3);
  cursor: pointer;
  font: inherit;
  scroll-snap-align: center;
  text-align: start;
  transition: background-color var(--dur-short) var(--ease-out), color var(--dur-short) var(--ease-out), transform var(--dur-micro) var(--ease-out);
}

.product-demo-tab::after {
  position: absolute;
  inset-block-end: calc(var(--site-rule-width) * -1);
  inset-inline-start: 0;
  width: 100%;
  height: var(--line-focus);
  background: var(--color-accent);
  content: "";
  opacity: 0;
  transform: scaleX(0.45);
  transform-origin: left;
  transition: opacity var(--dur-short) var(--ease-out), transform var(--dur-short) var(--ease-out);
}

.product-demo-tab:hover {
  background: var(--color-surface);
  color: var(--color-ink-2);
}

.product-demo-tab:active {
  transform: translateY(var(--site-rule-width));
}

.product-demo-tab:disabled {
  opacity: var(--opacity-disabled);
  cursor: not-allowed;
}

.product-demo-tab[aria-selected="true"] {
  background: var(--color-paper-2);
  color: var(--color-ink);
}

.product-demo-tab[aria-selected="true"]::after {
  opacity: 1;
  transform: scaleX(1);
}

.product-demo-tab-index {
  color: var(--color-ink-3);
  font-family: var(--font-technical);
  font-size: var(--text-micro);
  letter-spacing: var(--tracking-label);
  line-height: var(--leading-control);
}

.product-demo-tab-copy {
  display: grid;
  gap: var(--space-2xs);
}

.product-demo-tab-copy strong {
  font-size: var(--text-small);
  font-weight: var(--weight-medium);
  line-height: var(--leading-control);
  white-space: nowrap;
}

.product-demo-stage {
  min-width: 0;
  overflow: hidden;
  border: var(--site-rule-width) solid var(--color-rule-strong);
  border-radius: var(--radius-product);
  background: var(--color-paper-2);
  box-shadow: var(--shadow-stage);
}

.product-demo-status {
  display: flex;
  min-height: var(--control-height);
  padding: 0 var(--space-sm);
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm);
  border-bottom: var(--site-rule-width) solid var(--color-rule);
  color: var(--color-ink-3);
  font-family: var(--font-technical);
  font-size: var(--text-micro);
}

.product-demo-playback,
.product-demo-playback button {
  display: flex;
  align-items: center;
}

.product-demo-playback {
  gap: var(--space-xs);
}

.product-demo-playback > span {
  white-space: nowrap;
}

.demo-play-icon {
  display: grid;
  width: 1rem;
  height: 1rem;
  place-items: center;
}

.demo-play-icon .demo-ui-icon {
  width: 0.875rem;
  height: 0.875rem;
}

.product-demo-playback button {
  min-height: var(--touch-height);
  margin: 0;
  padding: 0 var(--space-xs);
  gap: var(--space-2xs);
  border: 0;
  border-inline-start: var(--site-rule-width) solid var(--color-rule);
  background: transparent;
  color: var(--color-ink-2);
  cursor: pointer;
  font: inherit;
  white-space: nowrap;
  transition: color var(--dur-short) var(--ease-out), transform var(--dur-micro) var(--ease-out);
}

.product-demo-playback button:hover,
.product-demo-playback button[aria-pressed="true"] {
  color: var(--color-accent-strong);
}

.product-demo-playback button:active {
  transform: translateY(var(--site-rule-width));
}

.product-demo-progress {
  height: var(--line-focus);
  background: var(--color-rule);
}

.product-demo-progress span {
  display: block;
  width: 100%;
  height: 100%;
  background: var(--color-accent);
  transform: scaleX(var(--demo-progress, 0.2));
  transform-origin: left;
  transition: transform var(--dur-long) var(--ease-out);
}

.product-demo.is-timing .product-demo-progress span {
  transition: none;
  will-change: transform;
}

.product-demo-stage-grid {
  display: grid;
  min-width: 0;
  padding: var(--space-sm);
  gap: var(--space-lg);
  touch-action: pan-y;
}

.porta-demo-device {
  position: relative;
  width: min(100%, 25.25rem);
  margin-inline: auto;
  padding: 0.375rem;
  border: var(--site-rule-width) solid var(--demo-device-edge);
  border-radius: var(--demo-device-radius);
  background: var(--demo-device-shell);
  box-shadow: var(--demo-device-shadow-stack);
}

.demo-device-key {
  position: absolute;
  z-index: var(--z-raised);
  inset-inline-end: -0.1875rem;
  width: 0.1875rem;
  border-radius: 0 var(--radius-pill) var(--radius-pill) 0;
  background: var(--demo-device-edge);
}

.demo-device-key.is-volume {
  inset-block-start: 6.25rem;
  height: 3.25rem;
}

.demo-device-key.is-power {
  inset-block-start: 10.25rem;
  height: 2.5rem;
}

.porta-demo-runtime {
  container-type: inline-size;
  position: relative;
  width: 100%;
  min-width: 0;
  margin-inline: auto;
  overflow: hidden;
  border: var(--site-rule-width) solid var(--demo-app-border-strong);
  border-radius: var(--demo-device-screen-radius);
  background: var(--demo-app-canvas);
  color: var(--demo-app-text);
  box-shadow: var(--demo-device-screen-shadow);
  font-family: var(--font-body);
}

.demo-system-status {
  position: relative;
  display: flex;
  min-height: var(--demo-system-bar-height);
  padding: 0 var(--space-sm);
  align-items: center;
  justify-content: space-between;
  background: var(--demo-app-page);
  color: var(--demo-app-muted);
  font-family: var(--font-technical);
  font-size: var(--demo-type-system);
}

.demo-system-status::after {
  position: absolute;
  inset-block-start: 0.4375rem;
  inset-inline-start: 50%;
  width: 0.4375rem;
  height: 0.4375rem;
  border: var(--site-rule-width) solid var(--demo-device-edge);
  border-radius: var(--radius-pill);
  background: var(--demo-device-shell);
  content: "";
  transform: translateX(-50%);
}

.demo-system-indicators {
  display: flex;
  align-items: center;
  gap: 0.3125rem;
}

.demo-system-signal {
  width: 0.6875rem;
  height: 0.5rem;
  background: linear-gradient(to right, currentColor 0 18%, transparent 18% 27%, currentColor 27% 48%, transparent 48% 57%, currentColor 57% 78%, transparent 78% 87%, currentColor 87% 100%);
  clip-path: polygon(0 100%, 0 72%, 18% 72%, 18% 53%, 48% 53%, 48% 30%, 78% 30%, 78% 0, 100% 0, 100% 100%);
}

.demo-system-wifi {
  width: 0.6875rem;
  height: 0.4375rem;
  border-top: var(--site-rule-width) solid currentColor;
  border-radius: 50% 50% 0 0;
  transform: scaleY(0.72);
}

.demo-system-indicators b {
  min-width: 1.125rem;
  padding: 0.125rem 0.1875rem;
  border-radius: 0.25rem;
  background: var(--demo-app-muted);
  color: var(--demo-app-page);
  font-size: var(--demo-type-system-compact);
  font-weight: var(--weight-semibold);
  line-height: 1;
  text-align: center;
}

.demo-system-navigation {
  display: grid;
  min-height: var(--demo-system-nav-height);
  place-items: center;
  background: var(--demo-app-canvas);
}

.demo-system-navigation span {
  width: 5.25rem;
  height: 0.1875rem;
  border-radius: var(--radius-pill);
  background: color-mix(in oklch, var(--demo-app-muted) 72%, transparent);
}

.demo-device-status,
.demo-app-bar,
.demo-app-navigation {
  display: flex;
  align-items: center;
}

.demo-device-status {
  min-height: 1.75rem;
  padding-inline: var(--space-xs);
  justify-content: space-between;
  background: var(--demo-app-canvas);
  color: var(--demo-app-muted);
  font-family: var(--font-technical);
  font-size: var(--demo-type-meta);
}

.demo-app-bar {
  min-height: 3.5rem;
  padding-inline: var(--space-xs);
  gap: var(--space-2xs);
  border-bottom: var(--site-rule-width) solid var(--demo-app-border);
  background: var(--demo-app-page);
}

.demo-app-bar img {
  width: 1.625rem;
  height: 1.625rem;
  border-radius: var(--demo-radius-control);
}

.demo-app-bar > div {
  display: grid;
  min-width: 0;
  margin-inline-end: auto;
  gap: 0.0625rem;
}

.demo-app-bar strong {
  font-size: var(--demo-type-title);
  font-weight: var(--weight-semibold);
  line-height: 1.2;
}

.demo-app-bar > div span {
  display: flex;
  align-items: center;
  gap: var(--space-3xs);
  color: var(--demo-app-muted);
  font-size: var(--demo-type-meta);
}

.demo-app-bar code {
  color: var(--demo-app-accent-strong);
  font-family: var(--font-technical);
  font-size: var(--demo-type-meta);
}

.product-demo-panels,
.product-demo-panel {
  min-width: 0;
}

.product-demo-panels {
  min-height: 31rem;
  background: var(--demo-app-canvas);
}

.product-demo-panel {
  margin: 0;
}

.product-demo-panel[hidden] {
  display: none;
}

.product-demo-captions {
  min-width: 0;
  align-self: center;
}

.product-demo-caption {
  display: grid;
  max-width: 34rem;
  margin-inline: auto;
  gap: var(--space-md);
  animation: demo-copy-settle var(--dur-long) var(--ease-out) both;
}

.product-demo-caption[hidden] {
  display: none;
}

.product-demo-panel:not([hidden]) :is(.demo-prompt-card, .demo-inbox-event, .demo-game-shell, .demo-feedback-canvas, .demo-accept-record) {
  animation: demo-detail-settle var(--dur-long) var(--ease-out) both;
}

.product-demo-panel:not([hidden]) .demo-terminal-lines p,
.product-demo-panel:not([hidden]) .demo-evidence-chain li {
  animation: demo-detail-settle var(--dur-long) var(--ease-out) both;
}

.product-demo-panel:not([hidden]) .demo-terminal-lines p:nth-child(2),
.product-demo-panel:not([hidden]) .demo-evidence-chain li:nth-child(2) {
  animation-delay: 60ms;
}

.product-demo-panel:not([hidden]) .demo-terminal-lines p:nth-child(3),
.product-demo-panel:not([hidden]) .demo-evidence-chain li:nth-child(3) {
  animation-delay: 120ms;
}

.product-demo-panel:not([hidden]) .demo-terminal-lines p:nth-child(4) {
  animation-delay: 180ms;
}

.product-demo-panel:not([hidden]) .demo-feedback-scene .demo-annotation-box {
  animation: demo-annotation-settle var(--dur-long) var(--ease-out) 120ms both;
}

.demo-touch-cue {
  position: absolute;
  z-index: var(--z-raised);
  display: block;
  width: var(--demo-touch-cue-size);
  height: var(--demo-touch-cue-size);
  border: var(--site-rule-width) solid color-mix(in oklch, var(--demo-app-text) 72%, transparent);
  border-radius: var(--radius-pill);
  background: color-mix(in oklch, var(--demo-app-text) 12%, transparent);
  opacity: 0;
  pointer-events: none;
}

.demo-touch-cue span {
  position: absolute;
  inset: 0.4375rem;
  border-radius: inherit;
  background: var(--demo-app-text);
}

.demo-prompt-card,
.demo-inbox-event,
.demo-feedback-canvas {
  position: relative;
}

.demo-prompt-card .demo-touch-cue {
  inset-inline-end: var(--space-xs);
  inset-block-end: var(--space-xs);
}

.demo-inbox-event .demo-touch-cue {
  inset-inline-end: var(--space-sm);
  inset-block-end: var(--space-sm);
}

.demo-feedback-canvas .demo-touch-cue {
  inset-inline-end: 18%;
  inset-block-end: 12%;
}

.product-demo-panel:not([hidden]) .demo-touch-cue.is-tap {
  animation: demo-touch-tap var(--dur-touch-tap) var(--ease-out) var(--dur-touch-tap-delay) both;
}

.product-demo-panel:not([hidden]) .demo-touch-cue.is-drag {
  animation: demo-touch-drag var(--dur-touch-drag) var(--ease-in-out) var(--dur-touch-drag-delay) both;
}

.demo-build-activity {
  display: flex;
  margin-top: var(--space-sm);
  gap: var(--space-3xs);
}

.demo-build-activity span {
  width: 0.3125rem;
  height: 0.3125rem;
  border-radius: var(--radius-pill);
  background: var(--demo-app-accent);
  opacity: 0.3;
}

.product-demo-panel:not([hidden]) .demo-build-activity span {
  animation: demo-build-step var(--dur-build-activity) var(--ease-in-out) calc(var(--dur-build-delay) + (var(--build-index, 0) * var(--dur-build-stagger))) 2 alternate;
}

.demo-build-activity span:nth-child(2) {
  --build-index: 1;
}

.demo-build-activity span:nth-child(3) {
  --build-index: 2;
}

.product-demo-caption span,
.product-demo-caption small {
  color: var(--color-accent-strong);
  font-family: var(--font-technical);
  font-size: var(--text-micro);
  font-weight: var(--weight-medium);
  letter-spacing: var(--tracking-label);
  line-height: var(--leading-control);
}

.product-demo-caption strong {
  max-width: 25ch;
  font-size: var(--text-heading-3);
  font-weight: var(--weight-medium);
  letter-spacing: var(--tracking-heading);
  line-height: var(--leading-heading);
}

.product-demo-caption p {
  max-width: 46ch;
  margin: 0;
  color: var(--color-ink-2);
  font-size: var(--text-small);
}

.product-demo-caption small {
  color: var(--color-ink-3);
}

.demo-app-page {
  min-height: 31rem;
  padding: var(--demo-page-padding);
  background: var(--demo-app-page);
}

.demo-page-heading,
.demo-section-label,
.demo-host-group header,
.demo-project-row,
.demo-session-row,
.demo-inbox-event header,
.demo-preview-record > header,
.demo-preview-record footer {
  display: flex;
  min-width: 0;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2xs);
}

.demo-page-heading {
  min-height: var(--demo-touch-height);
  margin-bottom: var(--space-sm);
}

.demo-page-heading > div {
  display: grid;
  gap: 0.125rem;
}

.demo-page-heading span,
.demo-section-label,
.demo-page-heading small {
  color: var(--demo-app-faint);
  font-size: var(--demo-type-meta);
}

.demo-page-heading h3 {
  margin: 0;
  color: var(--demo-app-text);
  font-size: 1.1875rem;
  font-weight: var(--weight-semibold);
  letter-spacing: -0.02em;
  line-height: 1.18;
}

.demo-faux-control {
  display: inline-flex;
  min-height: var(--demo-touch-height);
  padding-inline: var(--space-xs);
  align-items: center;
  justify-content: center;
  border: var(--site-rule-width) solid var(--demo-app-border);
  border-radius: var(--demo-radius-control);
  background: var(--demo-app-control);
  color: var(--demo-app-text);
  font: inherit;
  font-size: var(--demo-type-control);
}

.demo-page-heading .demo-faux-control {
  width: var(--demo-touch-height);
  padding: 0;
  color: var(--demo-app-accent-strong);
  font-size: 1.25rem;
}

.demo-search {
  display: flex;
  min-height: 2.5rem;
  padding-inline: var(--space-xs);
  align-items: center;
  margin-bottom: var(--space-md);
  border: var(--site-rule-width) solid var(--demo-app-border);
  border-radius: var(--demo-radius-control);
  background: var(--demo-app-control);
  color: var(--demo-app-faint);
  font-size: var(--demo-type-body);
}

.demo-section-label {
  margin-bottom: var(--space-2xs);
  text-transform: uppercase;
  letter-spacing: var(--tracking-label);
}

.demo-section-label small {
  color: var(--demo-app-faint);
  font-size: inherit;
  text-transform: none;
  letter-spacing: 0;
}

.demo-host-group,
.demo-inbox-event,
.demo-preview-record {
  overflow: hidden;
  border: var(--site-rule-width) solid var(--demo-app-border);
  border-radius: var(--demo-radius-card);
  background: var(--demo-app-surface);
}

.demo-host-group header {
  min-height: var(--demo-row-height);
  padding: 0 var(--space-xs);
}

.demo-host-icon,
.demo-source-mark {
  display: grid;
  flex: 0 0 auto;
  width: 2.125rem;
  height: 2.125rem;
  place-items: center;
  border: var(--site-rule-width) solid var(--color-accent-line);
  border-radius: var(--demo-radius-control);
  background: var(--demo-app-accent-soft);
  color: var(--demo-app-accent-strong);
  font-family: var(--font-technical);
  font-size: var(--demo-type-control);
}

.demo-host-group header > div:nth-child(2),
.demo-project-row > div,
.demo-session-row > div {
  display: grid;
  min-width: 0;
  margin-inline-end: auto;
  gap: 0.125rem;
}

.demo-host-group strong,
.demo-project-row strong,
.demo-session-row strong,
.demo-inbox-event strong,
.demo-artifact-row strong {
  font-size: var(--demo-type-title);
  font-weight: var(--weight-semibold);
  line-height: 1.24;
}

.demo-host-group small,
.demo-project-row small,
.demo-session-row small,
.demo-artifact-row small {
  color: var(--demo-app-faint);
  font-size: var(--demo-type-meta);
}

.demo-live-label {
  display: flex;
  align-items: center;
  gap: var(--space-3xs);
  color: var(--demo-app-accent-strong);
  font-size: var(--demo-type-meta);
}

.demo-project-row,
.demo-session-row {
  min-height: var(--demo-row-height);
  padding-inline: var(--space-xs);
  border-top: var(--site-rule-width) solid var(--demo-app-border);
}

.demo-project-row > span:last-child {
  color: var(--demo-app-accent-strong);
  font-size: var(--demo-type-meta);
}

.demo-folder-mark {
  width: 1.5rem;
  height: 1.125rem;
  border: var(--site-rule-width) solid var(--demo-app-accent-strong);
  border-radius: 0.25rem;
}

.demo-session-row {
  margin-inline-start: var(--space-lg);
}

.demo-session-row code,
.demo-inbox-event code,
.demo-preview-record code {
  color: var(--demo-app-accent-strong);
  font-family: var(--font-technical);
  font-size: var(--demo-type-meta);
}

.demo-segment {
  display: grid;
  min-height: 2.25rem;
  margin-bottom: var(--space-sm);
  padding: 0.1875rem;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-radius: var(--demo-radius-control);
  background: var(--demo-app-control);
  color: var(--demo-app-faint);
  font-size: var(--demo-type-meta);
  text-align: center;
}

.demo-segment > * {
  display: grid;
  place-items: center;
}

.demo-segment strong {
  border-radius: calc(var(--demo-radius-control) - 0.125rem);
  background: var(--demo-app-surface-raised);
  color: var(--demo-app-text);
  font-weight: var(--weight-medium);
}

.demo-count,
.demo-ready-tag {
  padding: 0.25rem 0.5rem;
  border: var(--site-rule-width) solid var(--color-accent-line);
  border-radius: var(--radius-pill);
  color: var(--demo-app-accent-strong) !important;
  font-family: var(--font-technical);
}

.demo-inbox-event {
  display: grid;
  padding: var(--space-xs);
  grid-template-columns: 2.125rem minmax(0, 1fr);
  gap: var(--space-xs);
}

.demo-inbox-event + .demo-inbox-event {
  margin-top: var(--space-2xs);
}

.demo-inbox-event.is-primary {
  border-color: var(--color-accent-line);
  background: color-mix(in oklch, var(--demo-app-accent-soft) 18%, var(--demo-app-surface));
}

.demo-source-mark span {
  width: 0.875rem;
  height: 0.875rem;
  border: var(--site-rule-width) solid currentColor;
  border-radius: var(--radius-pill);
}

.demo-source-mark.is-warm {
  border-color: color-mix(in oklch, var(--demo-app-warning) 50%, var(--demo-app-border));
  background: color-mix(in oklch, var(--demo-app-warning) 12%, transparent);
  color: var(--demo-app-warning);
}

.demo-inbox-event > div:last-child {
  min-width: 0;
}

.demo-inbox-event time {
  color: var(--demo-app-faint);
  font-size: var(--demo-type-meta);
}

.demo-inbox-event p {
  margin: var(--space-2xs) 0;
  color: var(--demo-app-muted);
  font-size: var(--demo-type-control);
  line-height: 1.4;
}

.demo-inbox-event small {
  color: var(--demo-app-accent-strong);
  font-size: var(--demo-type-meta);
}

.demo-task-link {
  display: grid;
  margin-top: var(--space-sm);
  padding-block: var(--space-xs);
  grid-template-columns: minmax(0, 1fr) auto auto;
  align-items: center;
  gap: var(--space-xs);
  border-block: var(--site-rule-width) solid var(--demo-app-border);
  color: var(--demo-app-faint);
  font-size: var(--demo-type-meta);
}

.demo-task-link strong {
  color: var(--demo-app-text);
  font-weight: var(--weight-medium);
}

.demo-task-link code {
  color: var(--demo-app-accent-strong);
  font-family: var(--font-technical);
}

.demo-terminal-scene {
  display: grid;
  min-height: 31rem;
  grid-template-rows: auto minmax(0, 1fr) auto;
  background: var(--demo-app-canvas);
}

.demo-tmux-strip,
.demo-keybar {
  display: flex;
  min-width: 0;
  overflow: hidden;
  border-bottom: var(--site-rule-width) solid var(--demo-app-border);
  background: var(--demo-app-page);
  color: var(--demo-app-faint);
  font-family: var(--font-technical);
  font-size: var(--demo-type-meta);
}

.demo-tmux-strip > * {
  min-height: 2.75rem;
  padding-inline: var(--space-xs);
  display: flex;
  flex: 0 0 auto;
  align-items: center;
  font-weight: 400;
}

.demo-tmux-strip strong {
  border: var(--site-rule-width) solid var(--color-accent-line);
  border-radius: var(--demo-radius-control);
  color: var(--demo-app-accent-strong);
}

.demo-tmux-strip i {
  width: 0.3125rem;
  height: 0.3125rem;
  margin-inline-start: var(--space-3xs);
  border-radius: var(--radius-pill);
  background: var(--demo-app-accent);
}

.demo-terminal-lines {
  min-width: 0;
  padding: var(--space-sm);
  overflow: hidden;
  color: var(--demo-app-text);
  font-family: var(--font-technical);
  font-size: var(--demo-type-control);
  line-height: 1.62;
}

.demo-terminal-lines p {
  margin: 0 0 var(--space-2xs);
  overflow-wrap: anywhere;
}

.demo-terminal-lines p:first-child {
  display: flex;
  justify-content: space-between;
  color: var(--demo-app-muted);
}

.demo-terminal-lines i,
.demo-terminal-lines b {
  color: var(--demo-app-accent-strong);
  font-style: normal;
  font-weight: 400;
}

.demo-terminal-lines .is-muted {
  color: var(--demo-app-faint);
}

.demo-prompt-card {
  display: grid;
  margin-block: var(--space-sm);
  padding: var(--space-sm);
  gap: var(--space-2xs);
  border: var(--site-rule-width) solid var(--demo-app-border-strong);
  border-radius: var(--demo-radius-card);
  background: var(--demo-app-surface);
  color: var(--demo-app-text);
  font-family: var(--font-body);
}

.demo-prompt-card span {
  color: var(--demo-app-accent-strong);
  font-family: var(--font-technical);
  font-size: var(--demo-type-meta);
}

.demo-prompt-card strong {
  font-size: var(--demo-type-title);
  line-height: var(--leading-heading);
}

.demo-prompt-card p {
  margin: 0;
  color: var(--demo-app-muted);
  font-size: var(--demo-type-control);
  line-height: 1.45;
}

.demo-terminal-cursor span {
  display: inline-block;
  width: 0.4375rem;
  height: 0.875rem;
  margin-inline-start: var(--space-3xs);
  vertical-align: -0.125rem;
  background: var(--demo-app-accent);
}

.demo-keybar {
  min-height: var(--demo-touch-height);
  border-top: var(--site-rule-width) solid var(--demo-app-border);
  border-bottom: 0;
}

.demo-keybar span {
  display: grid;
  flex: 1 1 auto;
  min-width: 2.5rem;
  place-items: center;
  border-inline-end: var(--site-rule-width) solid var(--demo-app-border);
  color: var(--demo-app-muted);
}

.demo-preview-record > header,
.demo-preview-record footer {
  min-height: var(--demo-row-height);
  padding-inline: var(--space-xs);
}

.demo-preview-record > header > div {
  display: grid;
  gap: 0.125rem;
}

.demo-preview-record > header > span,
.demo-preview-record footer {
  color: var(--demo-app-faint);
  font-size: var(--demo-type-meta);
}

.demo-artifact-row {
  display: grid;
  min-height: 4.25rem;
  padding: var(--space-2xs) var(--space-xs);
  align-items: center;
  grid-template-columns: 2.125rem minmax(0, 1fr) auto;
  gap: var(--space-xs);
  border-top: var(--site-rule-width) solid var(--demo-app-border);
}

.demo-artifact-row > div {
  display: grid;
  min-width: 0;
  gap: 0.125rem;
}

.demo-artifact-icon {
  display: grid;
  width: 2.125rem;
  height: 2.125rem;
  place-items: center;
  border-radius: var(--demo-radius-control);
  background: var(--demo-app-control);
  color: var(--demo-app-accent-strong);
  font-family: var(--font-technical);
  font-size: 0.5625rem;
}

.demo-artifact-row .demo-faux-control {
  min-height: 2rem;
  padding-inline: var(--space-2xs);
  color: var(--demo-app-accent-strong);
}

.demo-preview-record footer {
  border-top: var(--site-rule-width) solid var(--demo-app-border);
}

.demo-preview-record footer span {
  display: flex;
  align-items: center;
  gap: var(--space-3xs);
}

.demo-game-shell {
  display: grid;
  padding: var(--space-xs);
  gap: var(--space-xs);
  border: var(--site-rule-width) solid var(--demo-app-border);
  border-radius: var(--demo-radius-card);
  background: color-mix(in oklch, var(--demo-app-surface) 72%, var(--demo-app-canvas));
}

.demo-game-shell > header {
  display: flex;
  min-width: 0;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-xs);
}

.demo-game-shell > header > div {
  display: grid;
  min-width: 0;
  gap: var(--space-3xs);
}

.demo-game-shell > header span,
.demo-game-shell > header small,
.demo-game-status {
  color: var(--demo-app-faint);
  font-family: var(--font-technical);
  font-size: var(--demo-type-meta);
}

.demo-game-shell > header strong {
  color: var(--demo-app-accent-strong);
  font-size: var(--demo-type-title);
  font-weight: var(--weight-medium);
  line-height: 1.2;
}

.demo-game-shell > header > small {
  white-space: nowrap;
}

.demo-game-scoreboard {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-block: var(--site-rule-width) solid var(--demo-app-border);
}

.demo-game-scoreboard > span {
  display: grid;
  min-height: var(--demo-game-scoreboard-height);
  place-content: center;
  gap: 0.125rem;
  text-align: center;
}

.demo-game-scoreboard > span + span {
  border-inline-start: var(--site-rule-width) solid var(--demo-app-border);
}

.demo-game-scoreboard small {
  color: var(--demo-app-faint);
  font-family: var(--font-technical);
  font-size: var(--demo-type-system-compact);
  letter-spacing: var(--tracking-label);
}

.demo-game-scoreboard b {
  color: var(--demo-app-text);
  font-family: var(--font-technical);
  font-size: var(--demo-type-title);
  font-weight: var(--weight-medium);
}

.demo-game-board-wrap {
  position: relative;
  width: min(100%, var(--demo-game-board-size));
  margin-inline: auto;
}

.demo-game-board {
  display: grid;
  width: 100%;
  aspect-ratio: 1;
  padding: var(--demo-game-board-padding);
  grid-template-columns: repeat(12, minmax(0, 1fr));
  grid-template-rows: repeat(12, minmax(0, 1fr));
  gap: var(--demo-game-grid-gap);
  touch-action: none;
  border: var(--site-rule-width) solid var(--demo-app-border-strong);
  border-radius: var(--demo-radius-control);
  background:
    radial-gradient(circle at 50% 44%, color-mix(in oklch, var(--demo-app-accent-soft) 58%, transparent), transparent 62%),
    var(--demo-app-control);
}

.demo-game-board:focus-visible {
  outline: var(--line-focus) solid var(--color-focus);
  outline-offset: var(--underline-offset);
}

.demo-game-cell {
  min-width: 0;
  min-height: 0;
  border-radius: var(--demo-game-cell-radius);
  background: color-mix(in oklch, var(--demo-app-surface-raised) 74%, transparent);
}

.demo-game-cell.is-snake {
  background: color-mix(in oklch, var(--demo-app-accent) 82%, var(--demo-app-surface-raised));
  box-shadow: inset 0 var(--site-rule-width) 0 color-mix(in oklch, var(--demo-app-text) 22%, transparent);
}

.demo-game-cell.is-head {
  background: var(--demo-app-accent-strong);
  box-shadow: inset 0 0 0 var(--site-rule-width) color-mix(in oklch, var(--demo-app-text) 46%, transparent);
}

.demo-game-cell.is-food {
  border-radius: var(--radius-pill);
  background: var(--demo-app-warning);
  transform: scale(0.68);
  box-shadow: 0 0 0 0.125rem color-mix(in oklch, var(--demo-app-warning) 16%, transparent);
}

.demo-game-gesture {
  position: absolute;
  inset-inline-end: var(--space-2xs);
  inset-block-end: var(--space-2xs);
  padding: 0.1875rem 0.3125rem;
  border-radius: 0.25rem;
  background: color-mix(in oklch, var(--demo-device-shell) 82%, transparent);
  color: var(--demo-app-muted);
  font-family: var(--font-technical);
  font-size: var(--demo-type-gesture);
  letter-spacing: var(--tracking-label);
  pointer-events: none;
}

.demo-game-status {
  min-height: 1lh;
  text-align: center;
}

.demo-game-controls,
.demo-game-controls > div {
  display: flex;
  min-width: 0;
  gap: var(--space-3xs);
}

.demo-game-controls {
  align-items: center;
  justify-content: space-between;
}

.demo-game-controls > div {
  flex: 0 0 auto;
}

.demo-game-button {
  min-width: var(--demo-touch-height);
  min-height: var(--demo-touch-height);
  padding-inline: var(--space-xs);
  border: var(--site-rule-width) solid var(--demo-app-border-strong);
  border-radius: var(--demo-radius-control);
  background: var(--demo-app-surface-raised);
  color: var(--demo-app-text);
  font: inherit;
  font-size: var(--demo-type-control);
  white-space: nowrap;
  transition: transform var(--dur-micro) var(--ease-out), background-color var(--dur-micro) var(--ease-out);
}

.demo-game-start {
  min-width: 7.5rem;
  border-color: var(--color-accent-line);
  background: var(--demo-app-accent);
  color: var(--color-accent-ink);
  font-weight: var(--weight-semibold);
}

.demo-game-dpad .demo-game-button {
  padding-inline: 0;
  font-family: var(--font-technical);
}

.demo-game-button:focus-visible {
  outline: var(--line-focus) solid var(--color-focus);
  outline-offset: var(--underline-offset);
}

.demo-game-button:active {
  transform: translateY(var(--site-rule-width));
}

.demo-game-button:disabled {
  cursor: not-allowed;
  opacity: var(--opacity-disabled);
}

@container (max-width: 22.5rem) {
  .demo-game-controls {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
  }

  .demo-game-controls > div {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .demo-game-start,
  .demo-game-controls > div .demo-game-button {
    width: 100%;
    min-width: 0;
  }
}

@media (hover: hover) and (pointer: fine) {
  .demo-game-button:hover {
    background: var(--demo-app-surface-raised);
  }

  .demo-game-start:hover {
    background: var(--demo-app-accent-strong);
  }
}

.demo-feedback-canvas {
  position: relative;
  min-height: 18rem;
  padding: var(--space-md);
  overflow: hidden;
  border: var(--site-rule-width) solid var(--demo-app-border);
  border-radius: var(--demo-radius-card);
  background: var(--demo-app-canvas);
}

.demo-game-feedback {
  display: grid;
  align-content: center;
  gap: var(--space-2xs);
}

.demo-game-feedback .demo-game-board {
  width: min(100%, 15rem);
}

.demo-feedback-action {
  min-height: 2rem;
  padding-inline: var(--space-xs);
  display: inline-flex;
  align-items: center;
  justify-self: center;
  border: var(--site-rule-width) solid var(--demo-app-border-strong);
  border-radius: var(--demo-radius-control);
  background: var(--demo-app-control);
  color: var(--demo-app-muted);
  font-size: var(--demo-type-control);
}

.demo-game-feedback .demo-annotation-box {
  inset: auto calc(50% - 5.25rem) var(--space-sm) auto;
  width: 10.5rem;
  height: 3.125rem;
}

.demo-accepted-tag {
  padding: var(--space-3xs) var(--space-2xs);
  border-radius: var(--radius-pill);
  background: var(--demo-app-accent);
  color: var(--color-accent-ink) !important;
  font-family: var(--font-technical);
}

.demo-accept-record {
  display: grid;
  padding: var(--space-md);
  grid-template-columns: auto minmax(0, 1fr);
  gap: var(--space-sm);
  border: var(--site-rule-width) solid var(--color-accent-line);
  border-radius: var(--demo-radius-card);
  background: color-mix(in oklch, var(--demo-app-accent-soft) 18%, var(--demo-app-surface));
}

.demo-accept-mark {
  display: grid;
  width: 2.5rem;
  height: 2.5rem;
  place-items: center;
  border-radius: var(--radius-pill);
  background: var(--demo-app-accent);
  color: var(--color-accent-ink);
  font-weight: var(--weight-semibold);
}

.demo-accept-mark .demo-ui-icon {
  width: 1.125rem;
  height: 1.125rem;
}

.demo-accept-record strong,
.demo-evidence-chain strong,
.demo-next-step strong {
  font-size: var(--demo-type-title);
  font-weight: var(--weight-semibold);
}

.demo-accept-record p {
  margin: var(--space-2xs) 0 0;
  color: var(--demo-app-muted);
  font-size: var(--demo-type-control);
  line-height: 1.45;
}

.demo-evidence-chain {
  margin: var(--space-sm) 0 0;
  padding: 0;
  list-style: none;
  border-block: var(--site-rule-width) solid var(--demo-app-border);
}

.demo-evidence-chain li {
  display: grid;
  min-height: var(--demo-row-height);
  padding-inline: var(--space-2xs);
  grid-template-columns: auto minmax(0, 1fr);
  align-items: center;
  gap: var(--space-xs);
}

.demo-evidence-chain li + li {
  border-top: var(--site-rule-width) solid var(--demo-app-border);
}

.demo-evidence-chain li > span {
  color: var(--demo-app-accent-strong);
  font-family: var(--font-technical);
  font-size: var(--demo-type-meta);
}

.demo-evidence-chain li > div {
  display: grid;
  gap: var(--space-3xs);
}

.demo-evidence-chain small,
.demo-next-step span {
  color: var(--demo-app-faint);
  font-size: var(--demo-type-meta);
}

.demo-next-step {
  display: flex;
  min-height: var(--demo-touch-height);
  margin-top: var(--space-sm);
  padding-inline: var(--space-xs);
  align-items: center;
  justify-content: space-between;
  gap: var(--space-xs);
  border-radius: var(--demo-radius-control);
  background: var(--demo-app-control);
}

.demo-feedback-product {
  display: grid;
  min-height: 15rem;
  padding: var(--space-lg);
  align-content: center;
  gap: var(--space-2xs);
  border: var(--site-rule-width) solid var(--demo-app-border);
  background: var(--demo-app-page);
}

.demo-feedback-product span,
.demo-feedback-product small {
  color: var(--demo-app-faint);
  font-family: var(--font-technical);
  font-size: var(--demo-type-meta);
}

.demo-feedback-product strong {
  max-width: 12ch;
  font-size: 1.5rem;
  letter-spacing: -0.035em;
  line-height: 1.05;
}

.demo-feedback-product i {
  display: block;
  width: 4rem;
  height: 1.75rem;
  margin-block: var(--space-2xs);
  border-radius: var(--demo-radius-control);
  background: var(--demo-app-accent);
}

.demo-annotation-box {
  position: absolute;
  inset: 4.5rem 1.25rem auto auto;
  width: 9.5rem;
  height: 5.5rem;
  border: 0.125rem solid var(--demo-app-danger);
  border-radius: var(--demo-radius-control);
}

.demo-annotation-box b {
  position: absolute;
  inset: -0.75rem -0.75rem auto auto;
  display: grid;
  width: 1.5rem;
  height: 1.5rem;
  place-items: center;
  border-radius: var(--radius-pill);
  background: var(--demo-app-danger);
  color: var(--demo-app-text);
  font-size: var(--demo-type-meta);
}

.demo-feedback-composer {
  display: grid;
  margin-top: var(--space-2xs);
  padding: var(--space-xs);
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: var(--space-xs);
  border: var(--site-rule-width) solid var(--demo-app-border);
  border-radius: var(--demo-radius-card);
  background: var(--demo-app-surface);
}

.demo-feedback-composer strong {
  font-size: var(--demo-type-title);
}

.demo-feedback-composer p {
  margin: 0.125rem 0 0;
  color: var(--demo-app-muted);
  font-size: var(--demo-type-meta);
  line-height: 1.35;
}

.demo-feedback-composer .demo-faux-control.is-primary {
  padding-inline: var(--space-xs);
  border-color: var(--color-accent-line);
  background: var(--demo-app-accent);
  color: var(--color-accent-ink);
  font-weight: var(--weight-semibold);
}

.demo-app-navigation {
  min-height: 3.25rem;
  border-top: var(--site-rule-width) solid var(--demo-app-border);
  background: var(--demo-app-page);
}

.demo-app-navigation span {
  display: grid;
  flex: 1 1 0;
  min-width: 0;
  place-items: center;
  gap: 0.1875rem;
  color: var(--demo-app-faint);
  font-size: 0.5625rem;
  line-height: 1;
  white-space: nowrap;
}

.demo-app-navigation i {
  width: 1rem;
  height: 0.1875rem;
  border-radius: var(--radius-pill);
  background: var(--demo-app-border-strong);
}

.demo-app-navigation span.is-active {
  color: var(--demo-app-accent-strong);
}

.demo-app-navigation span.is-active i {
  background: var(--demo-app-accent);
}

@media (max-width: 26.875rem) {
  .hero {
    padding-block: var(--space-xl) var(--space-lg);
  }

  .hero h1 {
    font-size: clamp(2.375rem, 11vw, 3rem);
  }

  .hero-copy {
    margin-top: var(--space-md);
  }

  .hero-context {
    margin-top: var(--space-lg);
  }

  .product-demo-status {
    padding-inline: var(--space-2xs);
    gap: var(--space-3xs);
  }

  .product-demo-status > .terminal-status {
    font-size: 0;
  }

  .product-demo-status > .terminal-status::after {
    position: static;
    width: auto;
    height: auto;
    border: 0;
    animation: none;
    content: "LIVE";
    font-size: var(--text-micro);
  }

  .product-demo-playback {
    gap: var(--space-3xs);
  }

  .product-demo-playback button {
    min-width: var(--touch-height);
    padding-inline: var(--space-2xs);
    justify-content: center;
  }

  .product-demo-playback [data-demo-play-label] {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    overflow: hidden;
    clip: rect(0 0 0 0);
    white-space: nowrap;
  }

  .demo-feedback-composer {
    grid-template-columns: minmax(0, 1fr);
  }

  .demo-feedback-composer .demo-faux-control.is-primary {
    justify-self: stretch;
  }

  .demo-artifact-row {
    grid-template-columns: 2.125rem minmax(0, 1fr);
  }

  .demo-artifact-row .demo-faux-control {
    grid-column: 2;
    justify-self: start;
  }
}

.principle-section {
  padding-top: 0;
}

.principle-statement {
  display: grid;
  padding-block: clamp(var(--space-3xl), 10vw, var(--space-4xl));
  gap: var(--space-2xl);
  border-block: var(--site-rule-width) solid var(--color-rule);
}

.principle-intro {
  align-self: start;
}

.principle-statement h2 {
  max-width: 16ch;
  font-size: var(--text-statement);
}

.principle-list {
  margin: 0;
  padding: 0;
  border-top: var(--site-rule-width) solid var(--color-rule-strong);
  list-style: none;
}

.principle-list li {
  display: grid;
  padding-block: var(--space-lg);
  grid-template-columns: 2rem minmax(0, 1fr);
  gap: var(--space-sm);
  border-bottom: var(--site-rule-width) solid var(--color-rule);
}

.principle-list li > span {
  padding-top: 0.1875rem;
  color: var(--color-accent-strong);
  font-family: var(--font-technical);
  font-size: var(--text-micro);
  letter-spacing: var(--tracking-label);
}

.principle-list h3 {
  margin: 0;
  color: var(--color-ink);
  font-size: var(--text-heading-3);
  font-weight: var(--weight-medium);
  letter-spacing: var(--tracking-heading);
  line-height: var(--leading-heading);
}

.principle-list p {
  max-width: 52ch;
  margin: var(--space-xs) 0 0;
  color: var(--color-ink-2);
  font-size: var(--text-small);
  text-wrap: pretty;
}

.download-section {
  padding-top: 0;
}

.download-band {
  display: grid;
  padding-block: var(--section-space);
  gap: var(--space-2xl);
}

.download-copy h2 {
  max-width: 18ch;
}

.download-copy > p {
  max-width: 48ch;
}

.store-list {
  margin-top: var(--space-xl);
  border-top: var(--site-rule-width) solid var(--color-rule-strong);
}

.store-option {
  display: grid;
  min-height: calc(var(--touch-height) * 2);
  padding-block: var(--space-sm);
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: var(--space-md);
  border-bottom: var(--site-rule-width) solid var(--color-rule);
  color: var(--color-ink);
  text-decoration: none;
  transition: border-color var(--dur-short) var(--ease-out), color var(--dur-short) var(--ease-out), transform var(--dur-micro) var(--ease-out);
}

.store-option:hover {
  border-color: var(--color-accent-line);
  transform: translateX(var(--space-3xs));
}

.store-option-copy {
  display: grid;
  min-width: 0;
}

.store-option-copy small {
  color: var(--color-ink-3);
  font-family: var(--font-technical);
  font-size: var(--text-micro);
  letter-spacing: var(--tracking-label);
}

.store-option-copy strong {
  margin-top: var(--space-3xs);
  font-size: var(--text-heading-3);
  font-weight: var(--weight-medium);
}

.store-option-copy span {
  margin-top: var(--space-3xs);
  color: var(--color-ink-2);
  font-size: var(--text-small);
}

.store-option-state {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3xs);
  color: var(--color-accent-strong);
  font-family: var(--font-technical);
  font-size: var(--text-small);
  white-space: nowrap;
}

.store-option[data-state="pending"] {
  color: var(--color-ink-2);
}

.store-option[data-state="pending"] .store-option-state {
  color: var(--color-ink-3);
}

.download-actions {
  display: flex;
  margin-top: var(--space-md);
  flex-wrap: wrap;
  gap: var(--space-xs) var(--space-md);
}

.download-requirements {
  align-self: end;
  padding-top: var(--space-md);
  border-top: var(--site-rule-width) solid var(--color-rule-strong);
}

.download-requirements h3 {
  margin: 0 0 var(--space-md);
  font-size: var(--text-heading-3);
  font-weight: var(--weight-medium);
}

.download-requirements ul {
  margin: 0;
  padding-inline-start: var(--space-md);
}

.download-requirements li + li {
  margin-top: var(--space-xs);
}

.download-requirements li::marker {
  color: var(--color-accent);
}

.page-hero {
  padding-block: clamp(var(--space-2xl), 9vw, var(--space-4xl)) var(--space-2xl);
}

.page-hero h1 {
  max-width: 18ch;
  font-size: var(--text-page-title);
}

.page-kicker {
  color: var(--color-accent-strong);
}

.growth-page-hero {
  display: grid;
  gap: var(--space-2xl);
}

.growth-page-copy {
  align-self: center;
}

.growth-page-visual {
  min-width: 0;
  margin: 0;
}

.growth-page-media {
  aspect-ratio: var(--site-growth-media-ratio);
  overflow: hidden;
  border: var(--site-rule-width) solid var(--color-rule-strong);
  border-radius: var(--radius-product);
  background: var(--color-paper-2);
  box-shadow: var(--shadow-stage);
}

.growth-page-visual figcaption {
  display: flex;
  min-height: var(--touch-height);
  align-items: center;
  color: var(--color-ink-3);
  font-family: var(--font-technical);
  font-size: var(--text-micro);
}

.growth-page {
  max-width: var(--reading-max);
  padding-bottom: var(--space-3xl);
}

.growth-section,
.document-section,
.simple-section {
  padding-block: var(--space-xl);
  border-top: var(--site-rule-width) solid var(--color-rule);
}

.growth-section-body,
.document-section,
.simple-section {
  max-width: var(--reading-max);
}

.growth-section h2,
.document-section h2,
.simple-section h2 {
  max-width: 27ch;
  margin: 0 0 var(--space-md);
  font-size: var(--text-heading-3);
  font-weight: var(--weight-semibold);
  letter-spacing: var(--tracking-heading);
  line-height: var(--leading-heading);
}

.growth-section p,
.growth-section li,
.document-section p,
.document-section li,
.document-section dd,
.simple-section p,
.simple-section li {
  color: var(--color-ink-2);
}

.growth-section p,
.document-section p,
.simple-section p {
  margin: 0 0 var(--space-md);
}

.growth-section ul,
.document-section ul,
.simple-section ul,
.step-list {
  margin-block: var(--space-md);
  padding-inline-start: var(--space-md);
}

.growth-section li + li,
.document-section li + li,
.simple-section li + li,
.step-list li + li {
  margin-top: var(--space-2xs);
}

.growth-section li::marker,
.document-section li::marker,
.simple-section li::marker,
.step-list li::marker {
  color: var(--color-accent);
}

.growth-section-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs) var(--space-md);
  font-size: var(--text-small);
}

.growth-section-links a {
  white-space: nowrap;
}

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

.comparison-table-wrap {
  overflow-x: auto;
  border-block: var(--site-rule-width) solid var(--color-rule-strong);
}

.comparison-table {
  width: 100%;
  min-width: var(--site-table-min-width);
  border-collapse: collapse;
  text-align: start;
}

.comparison-table caption {
  padding-block: var(--space-sm);
  color: var(--color-ink-3);
  font-family: var(--font-technical);
  font-size: var(--text-micro);
  letter-spacing: var(--tracking-label);
  text-align: start;
}

.comparison-table th,
.comparison-table td {
  padding: var(--space-sm);
  border-top: var(--site-rule-width) solid var(--color-rule);
  color: var(--color-ink-2);
  font-size: var(--text-small);
  font-weight: var(--weight-regular);
  text-align: start;
  vertical-align: top;
}

.comparison-table thead th,
.comparison-table tbody th {
  color: var(--color-ink);
  font-weight: var(--weight-medium);
}

.comparison-sources {
  display: flex;
  flex-wrap: wrap;
  margin: var(--space-sm) 0 0;
  padding: 0;
  gap: var(--space-2xs) var(--space-md);
  color: var(--color-ink-3);
  font-size: var(--text-small);
  list-style: none;
}

.comparison-sources li {
  margin: 0;
}

.comparison-sources li::marker {
  content: none;
}

.fit-grid {
  display: grid;
  margin-top: var(--space-xl);
  gap: var(--space-xl);
}

.fit-grid article {
  padding-top: var(--space-md);
  border-top: var(--site-rule-width) solid var(--color-rule-strong);
}

.fit-grid h2 {
  margin: 0;
  font-size: var(--text-heading-3);
  font-weight: var(--weight-medium);
}

.fit-grid p {
  margin: var(--space-xs) 0 0;
  color: var(--color-ink-2);
}

.faq-list {
  margin: var(--space-xl) 0 0;
}

.faq-list > div {
  padding-block: var(--space-md);
  border-top: var(--site-rule-width) solid var(--color-rule);
}

.faq-list > div:last-child {
  border-bottom: var(--site-rule-width) solid var(--color-rule);
}

.faq-list dt {
  color: var(--color-ink);
  font-size: var(--text-body);
  font-weight: var(--weight-medium);
  line-height: var(--leading-heading);
}

.faq-list dd {
  margin: var(--space-xs) 0 0;
  color: var(--color-ink-2);
  line-height: var(--leading-body);
}

.document {
  max-width: var(--reading-max);
  padding-bottom: var(--space-3xl);
}

.document-meta {
  display: grid;
  margin: 0 0 var(--space-xl);
  padding-block: var(--space-sm);
  gap: var(--space-sm);
  border-block: var(--site-rule-width) solid var(--color-rule);
}

.document-meta span,
.document-meta strong {
  display: block;
}

.document-meta span {
  color: var(--color-ink-3);
  font-family: var(--font-technical);
  font-size: var(--text-micro);
  letter-spacing: var(--tracking-label);
}

.document-meta strong {
  margin-top: var(--space-3xs);
  font-size: var(--text-small);
  font-weight: var(--weight-medium);
  overflow-wrap: anywhere;
}

.document-highlights {
  margin: 0 0 var(--space-xl);
  padding: var(--space-md) var(--space-md) var(--space-md) var(--space-lg);
  border-block: var(--site-rule-width) solid var(--color-rule);
  color: var(--color-ink-2);
}

.document-section dl {
  margin: var(--space-md) 0 0;
}

.document-section dl > div {
  padding-block: var(--space-md);
  border-top: var(--site-rule-width) solid var(--color-rule);
}

.document-section dt {
  color: var(--color-ink);
  font-weight: var(--weight-semibold);
}

.document-section dd {
  margin: var(--space-2xs) 0 0;
}

.simple-page {
  max-width: var(--reading-max);
  padding-bottom: var(--space-3xl);
}

.contact-panel {
  padding: var(--space-md);
  border: var(--site-rule-width) solid var(--color-rule-strong);
  border-radius: var(--radius-panel);
  background: var(--color-paper-2);
}

.support-store-section {
  scroll-margin-top: calc(var(--nav-height) + var(--space-md));
}

.contact-panel strong,
.contact-panel a {
  display: block;
}

.contact-panel a {
  margin-top: var(--space-2xs);
  color: var(--color-accent-strong);
  font-family: var(--font-technical);
  overflow-wrap: anywhere;
}

.site-footer {
  background: var(--color-paper);
}

.site-footer-inner {
  width: min(calc(100% - (var(--site-gutter) * 2)), var(--content-max));
  margin-inline: auto;
  padding-block: var(--space-lg);
  border-top: var(--site-rule-width) solid var(--color-rule);
}

.site-footer-statement {
  max-width: 28ch;
  margin: 0;
  color: var(--color-ink-2);
  font-size: var(--text-small);
  line-height: var(--leading-body);
  text-wrap: pretty;
}

.site-footer-row {
  display: flex;
  align-items: flex-start;
  flex-direction: column;
  gap: var(--space-md);
}

.site-footer-brand {
  display: flex;
  min-width: 0;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-xs) var(--space-md);
}

.site-footer-brand p {
  margin: 0;
  color: var(--color-ink-3);
  font-size: var(--text-small);
}

.site-footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs) var(--space-md);
  color: var(--color-ink-2);
  font-size: var(--text-small);
}

.site-footer-links a {
  min-height: var(--touch-height);
  align-content: center;
  line-height: var(--leading-control);
  text-decoration: none;
}

.skip-link {
  position: fixed;
  z-index: var(--z-skip);
  inset-block-start: var(--space-sm);
  inset-inline-start: var(--space-sm);
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  border: 0;
  border-radius: var(--radius-control);
  background: var(--color-ink);
  clip-path: inset(50%);
  color: var(--color-paper);
  font-weight: var(--weight-semibold);
  white-space: nowrap;
}

.skip-link:focus {
  width: auto;
  height: auto;
  margin: 0;
  padding: var(--space-xs) var(--space-sm);
  overflow: visible;
  clip-path: none;
}

@keyframes hero-settle {
  from {
    opacity: 0;
    transform: translateY(var(--space-xs));
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes lifecycle-trace {
  0% {
    transform: scaleX(0);
  }
  100% {
    transform: scaleX(1);
  }
}

@keyframes lifecycle-node {
  0%,
  18% {
    border-color: var(--color-rule-strong);
    background: var(--color-paper);
    box-shadow: none;
  }
  36%,
  100% {
    border-color: var(--color-accent);
    background: var(--color-accent);
    box-shadow: var(--shadow-status);
  }
}

@keyframes demo-copy-settle {
  from {
    opacity: 0;
    transform: translateY(var(--space-xs));
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes demo-detail-settle {
  from {
    opacity: 0.72;
    transform: translateY(var(--space-3xs));
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes demo-annotation-settle {
  from {
    opacity: 0;
    transform: scale(0.96);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes demo-touch-tap {
  0%,
  100% {
    opacity: 0;
    transform: scale(1.12);
  }
  28% {
    opacity: 0.76;
    transform: scale(1);
  }
  52% {
    opacity: 0.28;
    transform: scale(0.78);
  }
}

@keyframes demo-touch-drag {
  0%,
  100% {
    opacity: 0;
    transform: translate3d(0, 0, 0) scale(1.08);
  }
  18% {
    opacity: 0.72;
    transform: translate3d(0, 0, 0) scale(1);
  }
  72% {
    opacity: 0.72;
    transform: translate3d(var(--demo-touch-drag-x), var(--demo-touch-drag-y), 0) scale(0.88);
  }
}

@keyframes demo-build-step {
  from {
    opacity: 0.3;
    transform: translateY(0);
  }
  to {
    opacity: 1;
    transform: translateY(calc(var(--space-3xs) * -1));
  }
}

@keyframes status-pulse {
  0%,
  66%,
  100% {
    opacity: 0;
    transform: scale(0.75);
  }
  80% {
    opacity: 0.45;
    transform: scale(1.9);
  }
}

@media (min-width: 32rem) {
  .document-meta {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 40rem) {
  .site-nav .nav-cta {
    display: inline-flex;
  }

  .download-band,
  .fit-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .site-footer-row {
    align-items: center;
    justify-content: space-between;
    flex-direction: row;
  }

  .site-footer-links {
    justify-content: flex-end;
  }
}

@media (min-width: 48rem) {
  .thesis-section {
    grid-template-columns: minmax(0, 1fr);
  }

  .principle-statement {
    grid-template-columns: minmax(18rem, 0.82fr) minmax(24rem, 1.18fr);
    align-items: start;
    gap: var(--space-3xl);
  }

  .download-band {
    gap: var(--space-3xl);
  }
}

@media (min-width: 60rem) {
  .site-nav-links {
    display: flex;
  }

  .site-menu {
    display: none;
  }

  .desktop-language-link {
    display: inline-flex;
  }

  .hero-layout {
    grid-template-columns: minmax(0, 5fr) minmax(34rem, 7fr);
    align-items: center;
  }

  .product-demo {
    grid-template-columns: minmax(17rem, 0.72fr) minmax(0, 1.28fr);
    gap: var(--space-lg);
  }

  .product-demo-tabs {
    display: grid;
    margin: 0;
    padding: 0;
    overflow: hidden;
    align-content: start;
    border: var(--site-rule-width) solid var(--color-rule);
    border-radius: var(--radius-panel);
    scroll-snap-type: none;
  }

  .product-demo-tab {
    grid-template-columns: var(--space-lg) minmax(0, 1fr);
    flex-basis: auto;
    min-height: 0;
    padding: var(--space-md);
    gap: var(--space-sm);
    border-inline-end: 0;
    border-block-end: var(--site-rule-width) solid var(--color-rule);
  }

  .product-demo-tab:last-child {
    border-block-end: 0;
  }

  .product-demo-tab::after {
    inset-block: 0;
    inset-inline-start: calc(var(--site-rule-width) * -1);
    width: var(--line-focus);
    height: 100%;
    transform: scaleY(0.45);
    transform-origin: top;
  }

  .product-demo-tab[aria-selected="true"]::after {
    transform: scaleY(1);
  }

  .product-demo-stage-grid {
    grid-template-columns: minmax(18rem, 0.96fr) minmax(14rem, 0.74fr);
    padding: var(--space-lg);
    align-items: center;
    gap: var(--space-xl);
  }

  .product-demo-caption {
    margin: 0;
  }

  .growth-page-hero {
    grid-template-columns: minmax(0, 1fr) minmax(23rem, 0.72fr);
    align-items: center;
    gap: clamp(var(--space-2xl), 8vw, var(--space-4xl));
  }
}

/* Homepage 2.5 · one calm promise, one product loop, App-native proof. */
.hero {
  padding-block: clamp(var(--space-2xl), 7vw, 6.5rem) clamp(var(--space-xl), 5vw, 4.5rem);
  text-align: center;
}

.hero-layout {
  display: block;
}

.hero-copy-panel {
  max-width: 58rem;
  margin-inline: auto;
}

.hero h1 {
  max-width: 22ch;
  margin-inline: auto;
}

.hero h1 strong::after {
  width: var(--space-lg);
  margin-inline: auto;
}

.hero-copy {
  max-width: 52ch;
  margin-inline: auto;
}

.hero-actions,
.hero-context {
  justify-content: center;
}

.hero-context {
  width: fit-content;
  max-width: 100%;
  margin-inline: auto;
}

.workflow-heading {
  max-width: 48rem;
  margin-bottom: var(--space-xl);
  margin-inline: auto;
  text-align: center;
}

.workflow-heading h2,
.workflow-heading > p {
  max-width: none;
}

.workflow-heading::after {
  width: var(--space-lg);
  margin-inline: auto;
}

.product-demo {
  display: block;
}

.product-demo-tabs {
  margin-bottom: var(--space-lg);
}

.product-demo-tab {
  flex-basis: min(36vw, 8.75rem);
  min-height: 4rem;
  padding: var(--space-xs) var(--space-sm);
  align-content: center;
  gap: var(--space-2xs);
  text-align: center;
}

.product-demo-tab-copy strong {
  line-height: 1.25;
}

.product-demo-stage {
  max-width: 68rem;
  margin-inline: auto;
  border-color: var(--color-rule);
  box-shadow: none;
}

.product-demo-status {
  background: var(--color-paper);
}

.product-demo-stage-grid {
  padding: clamp(var(--space-md), 4vw, var(--space-xl));
}

.porta-demo-device {
  width: min(100%, 25.3125rem);
}

.product-demo-panels {
  height: var(--demo-device-content-height);
  overflow: hidden;
}

.product-demo-panel,
.product-demo-panel > div,
.demo-app-page,
.demo-terminal-scene {
  height: 100%;
  min-height: 0;
}

.demo-app-page {
  display: flex;
  padding: 0;
  flex-direction: column;
}

.demo-terminal-scene {
  grid-template-rows: auto auto minmax(0, 1fr) auto;
}

.demo-terminal-appbar {
  display: flex;
  min-width: 0;
  min-height: 3.625rem;
  padding-inline: var(--space-2xs);
  align-items: center;
  gap: var(--space-2xs);
  border-bottom: var(--site-rule-width) solid var(--demo-app-border);
  background: var(--demo-app-page);
  color: var(--demo-app-text);
  font-size: var(--demo-type-control);
}

.demo-icon-control {
  display: grid;
  flex: 0 0 var(--demo-touch-height);
  height: var(--demo-touch-height);
  place-items: center;
  border: var(--site-rule-width) solid var(--demo-app-border);
  border-radius: var(--demo-radius-control);
  background: var(--demo-app-control);
  color: var(--demo-app-muted);
  font-size: 1rem;
}

.demo-project-chip,
.demo-host-chip {
  display: flex;
  min-width: 0;
  min-height: var(--demo-touch-height);
  padding-inline: var(--space-xs);
  align-items: center;
  gap: var(--space-2xs);
  overflow: hidden;
  border: var(--site-rule-width) solid var(--demo-app-border);
  border-radius: var(--demo-radius-control);
  background: var(--demo-app-control);
  white-space: nowrap;
  text-overflow: ellipsis;
}

.demo-project-chip {
  flex: 0 1 8.5rem;
}

.demo-host-chip {
  flex: 1 1 7rem;
}

.demo-project-chip i {
  width: 0.875rem;
  height: 0.6875rem;
  border: var(--site-rule-width) solid var(--demo-app-accent-strong);
  border-radius: 0.1875rem;
}

.demo-host-chip > i {
  flex: 0 0 auto;
  width: 1.375rem;
  height: 1.375rem;
  border: var(--site-rule-width) solid var(--color-accent-line);
  border-radius: var(--demo-radius-control);
}

.demo-host-chip b {
  flex: 0 0 auto;
  width: 0.4375rem;
  height: 0.4375rem;
  border-radius: var(--radius-pill);
  background: var(--demo-app-accent);
  box-shadow: var(--shadow-status);
}

.demo-host-chip span {
  min-width: 0;
  overflow: hidden;
  color: var(--demo-app-accent-strong);
  text-overflow: ellipsis;
}

.demo-host-chip em {
  display: grid;
  margin-inline-start: auto;
  place-items: center;
  color: var(--demo-app-faint);
  font-size: 1rem;
  font-style: normal;
}

.demo-inbox-header,
.demo-feedback-header {
  display: flex;
  min-height: 4.25rem;
  padding-inline: var(--space-sm);
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm);
  background: var(--demo-app-page);
}

.demo-inbox-header > strong {
  font-size: 1.1875rem;
  font-weight: var(--weight-medium);
}

.demo-inbox-header > span {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.demo-inbox-header i,
.demo-inbox-header b {
  display: grid;
  width: var(--demo-touch-height);
  height: var(--demo-touch-height);
  place-items: center;
  color: var(--demo-app-muted);
  font-size: 1.125rem;
  font-style: normal;
  font-weight: var(--weight-regular);
}

.demo-inbox-header b {
  color: var(--demo-app-accent-strong);
}

.demo-feedback-header > div {
  display: grid;
  min-width: 0;
  gap: 0.125rem;
}

.demo-feedback-header strong {
  font-size: var(--demo-type-title);
  font-weight: var(--weight-semibold);
}

.demo-feedback-header span {
  overflow: hidden;
  color: var(--demo-app-muted);
  font-size: var(--demo-type-control);
  text-overflow: ellipsis;
  white-space: nowrap;
}

.demo-feedback-header > b {
  display: grid;
  flex: 0 0 var(--demo-touch-height);
  height: var(--demo-touch-height);
  place-items: center;
  border: var(--site-rule-width) solid var(--demo-app-border);
  border-radius: var(--demo-radius-control);
  background: var(--demo-app-control);
  color: var(--demo-app-muted);
  font-size: 1.25rem;
  font-weight: var(--weight-regular);
}

.demo-screen-titlebar {
  display: grid;
  min-height: 4rem;
  padding-inline: var(--space-sm);
  grid-template-columns: minmax(2rem, 1fr) auto minmax(2rem, 1fr);
  align-items: center;
  border-bottom: var(--site-rule-width) solid var(--demo-app-border);
  background: var(--demo-app-page);
}

.demo-screen-titlebar strong {
  font-size: 1rem;
  font-weight: var(--weight-semibold);
}

.demo-screen-back,
.demo-screen-actions {
  color: var(--demo-app-muted);
  font-size: var(--demo-type-control);
}

.demo-screen-actions {
  justify-self: end;
  white-space: pre;
}

.demo-preview-meta {
  display: flex;
  min-height: 2.5rem;
  padding-inline: var(--space-sm);
  align-items: center;
  justify-content: space-between;
  border-bottom: var(--site-rule-width) solid var(--demo-app-border);
  color: var(--demo-app-faint);
  font-family: var(--font-technical);
  font-size: var(--demo-type-meta);
}

.demo-preview-meta strong {
  color: var(--demo-app-accent-strong);
  font-weight: var(--weight-medium);
}

.demo-app-page > :not(.demo-screen-titlebar, .demo-inbox-header, .demo-feedback-header, .demo-bottom-navigation, .demo-preview-meta) {
  margin-inline: var(--demo-page-padding);
}

.demo-app-page > .demo-segment {
  margin-top: var(--space-sm);
}

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

.demo-inbox-scene .demo-task-link {
  margin-bottom: auto;
}

.demo-bottom-navigation {
  display: grid;
  min-height: 3.75rem;
  margin-top: auto;
  padding-block: var(--space-2xs);
  grid-template-columns: repeat(5, minmax(0, 1fr));
  border-top: var(--site-rule-width) solid var(--demo-app-border);
  background: var(--demo-app-canvas);
}

.demo-bottom-navigation span {
  display: grid;
  min-width: 0;
  place-items: center;
  gap: 0.125rem;
  color: var(--demo-app-faint);
  font-size: 0.5rem;
}

.demo-bottom-navigation i {
  width: 0.75rem;
  height: 0.75rem;
  border: var(--site-rule-width) solid currentColor;
  border-radius: 0.1875rem;
}

.demo-bottom-navigation .is-active {
  color: var(--demo-app-accent-strong);
}

.demo-preview-scene .demo-game-shell,
.demo-feedback-scene .demo-feedback-canvas,
.demo-feedback-scene .demo-feedback-tools,
.demo-feedback-scene .demo-feedback-composer,
.demo-accept-scene .demo-accept-record,
.demo-accept-scene .demo-evidence-chain,
.demo-accept-scene .demo-next-step {
  margin-top: var(--space-sm);
}

.demo-feedback-tools {
  display: grid;
  min-height: 3.5rem;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-2xs);
}

.demo-feedback-tools > span {
  display: grid;
  place-items: center;
  gap: 0.125rem;
  border: var(--site-rule-width) solid var(--demo-app-border);
  border-radius: var(--demo-radius-control);
  background: var(--demo-app-control);
  color: var(--demo-app-muted);
  font-size: 1rem;
}

.demo-feedback-tools small {
  font-size: var(--demo-type-meta);
}

.demo-feedback-tools .is-selected {
  border-color: var(--color-accent-line);
  background: var(--demo-app-accent-soft);
  color: var(--demo-app-accent-strong);
}

.feature-stories {
  display: grid;
  padding-top: clamp(var(--space-2xl), 7vw, var(--space-3xl));
  gap: clamp(var(--space-3xl), 8vw, 7rem);
}

.feature-story {
  display: grid;
  min-width: 0;
  gap: var(--space-xl);
  align-items: center;
}

.feature-story-copy {
  max-width: 30rem;
}

.feature-story-copy > span {
  color: var(--color-accent-strong);
  font-family: var(--font-technical);
  font-size: var(--text-micro);
  letter-spacing: var(--tracking-label);
}

.feature-story-copy h2 {
  margin: var(--space-sm) 0 0;
  font-size: var(--text-feature-title);
  font-weight: var(--weight-medium);
  letter-spacing: var(--tracking-heading);
  line-height: var(--leading-heading);
  text-wrap: balance;
}

.feature-story-copy p {
  max-width: 46ch;
  margin: var(--space-md) 0 0;
  color: var(--color-ink-2);
}

.feature-story-visual {
  position: relative;
  min-width: 0;
  height: clamp(24rem, 50vw, 32rem);
  margin: 0;
  overflow: hidden;
  border: var(--site-rule-width) solid var(--color-rule);
  border-radius: var(--radius-product);
  background: var(--color-paper-2);
}

.feature-shot {
  position: absolute;
  overflow: hidden;
  border: 0;
  border-radius: var(--radius-panel);
  background: var(--color-paper);
  box-shadow: var(--shadow-evidence);
}

.feature-shot-primary {
  inset-block: var(--space-lg) calc(var(--space-xl) * -1);
  inset-inline-start: 50%;
  width: min(88%, 30rem);
  transform: translateX(-50%);
}

.feature-story-visual.has-secondary .feature-shot-primary {
  inset-inline-start: clamp(var(--space-md), 6vw, var(--space-3xl));
  width: min(76%, 27rem);
  transform: none;
}

.feature-shot-secondary {
  inset-inline-end: clamp(var(--space-sm), 5vw, var(--space-xl));
  inset-block-end: var(--space-lg);
  width: min(48%, 18rem);
  aspect-ratio: 0.58;
}

.feature-shot img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top center;
}

@media (max-width: 59.999rem) {
  .product-demo-stage-grid {
    padding: var(--space-xs);
  }

  .product-demo-caption {
    padding: var(--space-xs);
  }
}

@media (min-width: 60rem) {
  .hero-layout {
    display: block;
  }

  .product-demo {
    display: block;
  }

  .product-demo-tabs {
    display: flex;
    width: fit-content;
    max-width: 100%;
    margin-inline: auto;
    padding: 0;
    overflow-x: auto;
    border: var(--site-rule-width) solid var(--color-rule);
    border-radius: var(--radius-panel);
  }

  .product-demo-tab {
    display: grid;
    grid-template-columns: none;
    flex-basis: 8.75rem;
    padding: var(--space-xs) var(--space-sm);
    gap: var(--space-2xs);
    border-block-end: 0;
    border-inline-end: var(--site-rule-width) solid var(--color-rule);
  }

  .product-demo-tab:last-child {
    border-inline-end: 0;
  }

  .product-demo-tab::after {
    inset-block: auto calc(var(--site-rule-width) * -1);
    inset-inline-start: 0;
    width: 100%;
    height: var(--line-focus);
    transform: scaleX(0.45);
    transform-origin: center;
  }

  .product-demo-tab[aria-selected="true"]::after {
    transform: scaleX(1);
  }

  .product-demo-stage-grid {
    grid-template-columns: minmax(15rem, 0.62fr) minmax(24.5625rem, 1fr);
    gap: clamp(var(--space-xl), 5vw, var(--space-3xl));
  }

  .product-demo-caption {
    margin: 0;
  }

  .feature-story {
    grid-template-columns: minmax(16rem, 0.72fr) minmax(0, 1.28fr);
    gap: clamp(var(--space-2xl), 8vw, var(--space-4xl));
  }

  .feature-story.is-reversed {
    grid-template-columns: minmax(0, 1.28fr) minmax(16rem, 0.72fr);
  }

  .feature-story.is-reversed .feature-story-copy {
    grid-column: 2;
  }

  .feature-story.is-reversed .feature-story-visual {
    grid-row: 1;
    grid-column: 1;
  }
}

html[lang="zh-CN"] .hero h1,
html[lang="zh-CN"] .page-hero h1,
html[lang="zh-CN"] .section-heading h2,
html[lang="zh-CN"] .thesis-copy h2,
html[lang="zh-CN"] .product-demo-caption strong,
html[lang="zh-CN"] .principle-statement h2,
html[lang="zh-CN"] .download-copy h2,
html[lang="zh-CN"] .site-footer-statement {
  letter-spacing: -0.02em;
  line-height: 1.12;
}

html[lang="zh-CN"] .hero h1 {
  max-width: 18ch;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: var(--dur-reduced) !important;
    animation-iteration-count: 1 !important;
    transition-duration: var(--dur-reduced) !important;
  }

  .hero-copy-panel {
    transform: none;
  }

  .hero-lifecycle::after,
  .hero-lifecycle i,
  .demo-touch-cue,
  .demo-build-activity span {
    animation: none;
  }

  .hero-lifecycle::after {
    transform: scaleX(1);
  }

  .hero-lifecycle i {
    border-color: var(--color-accent);
    background: var(--color-accent);
  }

  .product-demo-panel,
  .product-demo-caption,
  .product-demo-panel:not([hidden]) :is(.demo-prompt-card, .demo-inbox-event, .demo-game-shell, .demo-feedback-canvas, .demo-accept-record),
  .product-demo-panel:not([hidden]) .demo-terminal-lines p,
  .product-demo-panel:not([hidden]) .demo-evidence-chain li,
  .product-demo-panel:not([hidden]) .demo-feedback-scene .demo-annotation-box {
    animation: none;
    transform: none;
  }

  .product-demo-progress span {
    transition: none;
  }
}