:root {
  color-scheme: dark;
  --color-background: #0b0c10;
  --color-surface: #12161d;
  --color-raised: #1a1f29;
  --color-primary: #8ea7ff;
  --color-on-primary: #071329;
  --color-accent: #58d8f4;
  --color-text: #f3f6ff;
  --color-muted: #b9c0cf;
  --color-outline: #293241;
  --color-future: #d5c5ff;
  --color-warning: #ffd59a;
  --color-on-warning: #2e1d00;
  --color-primary-hover: #a5b7ff;
  --color-raised-hover: #222a38;
  --color-surface-hover: #151a22;
  --header-height: 4rem;
  --radius-card: 1.25rem;
  --radius-panel: 1.75rem;
  --radius-pill: 999px;
  --page-gutter: clamp(1.25rem, 3vw, 2rem);
  --content-width: 75rem;
  --ease-standard: cubic-bezier(.2, .8, .2, 1);
  --duration-fast: 180ms;
  --duration-standard: 240ms;
  font-family: ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-synthesis: none;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  min-width: 20rem;
  min-height: 100vh;
  background:
    radial-gradient(circle at 78% 4%, rgba(142, 167, 255, .1), transparent 31rem),
    radial-gradient(circle at 20% 24%, rgba(88, 216, 244, .055), transparent 28rem),
    var(--color-background);
  color: var(--color-text);
  font-size: 1rem;
  line-height: 1.6;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: inherit;
  text-decoration: none;
}

button,
summary {
  font: inherit;
}

button,
a,
summary {
  -webkit-tap-highlight-color: transparent;
}

button {
  color: inherit;
}

p,
h1,
h2,
h3,
ul {
  margin-top: 0;
}

h1,
h2,
h3 {
  color: var(--color-text);
  line-height: 1.12;
  text-wrap: balance;
}

p {
  text-wrap: pretty;
}

:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 4px;
}

main:focus-visible,
section:focus-visible {
  outline: 2px solid rgba(88, 216, 244, .36);
  outline-offset: -4px;
  border-radius: var(--radius-panel);
}

.skip-link {
  position: fixed;
  top: .75rem;
  left: .75rem;
  z-index: 100;
  min-height: 3rem;
  padding: .7rem 1rem;
  border-radius: var(--radius-pill);
  background: var(--color-accent);
  color: #07171c;
  font-weight: 700;
  transform: translateY(-150%);
  transition: transform var(--duration-fast) var(--ease-standard);
}

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

.site-header {
  position: sticky;
  top: .75rem;
  z-index: 30;
  height: 0;
  padding-inline: var(--page-gutter);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(100%, var(--content-width));
  min-height: var(--header-height);
  margin: 0 auto;
  padding: .5rem .625rem .5rem .75rem;
  border: 1px solid rgba(185, 192, 207, .15);
  border-radius: var(--radius-panel);
  background: rgba(18, 22, 29, .92);
  box-shadow: 0 12px 32px rgba(0, 0, 0, .24);
  backdrop-filter: blur(18px) saturate(135%);
}

.brand {
  display: inline-flex;
  align-items: center;
  min-height: 3rem;
  gap: .75rem;
  border-radius: var(--radius-pill);
  color: var(--color-text);
  font-size: .875rem;
  font-weight: 700;
  letter-spacing: .16em;
}

.brand img {
  width: 2.5rem;
  height: 2.5rem;
  border-radius: .75rem;
}

.menu-toggle {
  display: none;
  place-items: center;
  width: 3rem;
  height: 3rem;
  padding: 0;
  border: 1px solid var(--color-outline);
  border-radius: 50%;
  background: var(--color-raised);
  cursor: pointer;
}

.menu-toggle span {
  display: block;
  width: 1.125rem;
  height: 2px;
  margin: 3px auto;
  border-radius: var(--radius-pill);
  background: currentColor;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: .25rem;
}

.site-nav a,
.language-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 3rem;
  min-height: 3rem;
  padding: 0 1rem;
  border: 0;
  border-radius: var(--radius-pill);
  background: transparent;
  color: var(--color-muted);
  font-size: .875rem;
  font-weight: 600;
  cursor: pointer;
  transition:
    color var(--duration-fast) var(--ease-standard),
    background-color var(--duration-fast) var(--ease-standard),
    transform var(--duration-fast) var(--ease-standard);
}

.site-nav a:hover,
.language-toggle:hover {
  background: var(--color-raised);
  color: var(--color-text);
}

.site-nav a[aria-current="location"] {
  background: rgba(142, 167, 255, .12);
  color: var(--color-text);
}

.site-nav .nav-download {
  margin-left: .25rem;
  background: var(--color-primary);
  color: var(--color-on-primary);
}

.site-nav .nav-download:hover {
  background: var(--color-primary-hover);
  color: var(--color-on-primary);
}

.language-toggle {
  width: 3rem;
  padding: 0;
  border: 1px solid var(--color-outline);
}

.language-toggle__label {
  line-height: 1;
}

html:not(.js) .language-toggle {
  display: none;
}

.hero {
  position: relative;
  isolation: isolate;
  display: grid;
  grid-template-columns: minmax(0, .88fr) minmax(32rem, 1.12fr);
  align-items: center;
  gap: clamp(2rem, 5vw, 5rem);
  width: min(100%, var(--content-width));
  min-height: 44rem;
  margin: 0 auto;
  padding: 7.25rem var(--page-gutter) 4.25rem;
  scroll-margin-top: 6rem;
}

.hero__ambient {
  position: absolute;
  z-index: -1;
  inset: 0;
  overflow: hidden;
  background:
    radial-gradient(circle at 70% 42%, rgba(88, 216, 244, .14), transparent 22rem),
    radial-gradient(circle at 54% 34%, rgba(142, 167, 255, .13), transparent 28rem),
    linear-gradient(to bottom, transparent 72%, var(--color-background) 100%);
  pointer-events: none;
}

.hero__ambient::before {
  position: absolute;
  top: -18%;
  right: 2%;
  width: 52%;
  height: 76%;
  border: 1px solid rgba(88, 216, 244, .08);
  border-radius: 50%;
  box-shadow: 0 0 7rem rgba(88, 216, 244, .08);
  content: "";
  opacity: .75;
  transform: rotate(-12deg);
  animation: ambient-orbit 18s ease-in-out infinite;
}

.hero-field {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: .95;
  mix-blend-mode: screen;
  pointer-events: none;
}

.hero__content {
  position: relative;
  z-index: 2;
}

.eyebrow {
  margin-bottom: 1rem;
  color: var(--color-accent);
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: .16em;
  text-transform: uppercase;
}

.hero h1 {
  max-width: 12ch;
  margin-bottom: 1.5rem;
  font-size: clamp(2.85rem, 5vw, 4.25rem);
  font-weight: 700;
  letter-spacing: -.045em;
}

.hero__lead {
  max-width: 35rem;
  margin-bottom: 2rem;
  color: var(--color-muted);
  font-size: clamp(1.0625rem, 1.6vw, 1.1875rem);
  line-height: 1.65;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3rem;
  padding: .75rem 1.25rem;
  border: 1px solid transparent;
  border-radius: var(--radius-pill);
  font-size: .9375rem;
  font-weight: 700;
  line-height: 1.2;
  text-align: center;
  transition:
    transform var(--duration-fast) var(--ease-standard),
    background-color var(--duration-fast) var(--ease-standard),
    border-color var(--duration-fast) var(--ease-standard),
    color var(--duration-fast) var(--ease-standard);
}

.button--primary {
  background: var(--color-primary);
  color: var(--color-on-primary);
}

.button--primary:hover {
  background: var(--color-primary-hover);
}

.button--secondary {
  border-color: var(--color-outline);
  background: var(--color-raised);
  color: var(--color-text);
}

.button--secondary:hover {
  border-color: rgba(142, 167, 255, .65);
  background: var(--color-raised-hover);
}

.button--disabled {
  border-color: rgba(213, 197, 255, .22);
  background: rgba(213, 197, 255, .08);
  color: var(--color-future);
  cursor: not-allowed;
  opacity: .78;
  pointer-events: none;
  user-select: none;
}

.button:active,
.site-nav a:active,
.language-toggle:active,
.menu-toggle:active {
  transform: scale(.97);
}

.hero__repository-links {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem 1.25rem;
  margin-top: 1.25rem;
}

.hero__repository-links a,
.text-link {
  color: var(--color-muted);
  font-size: .875rem;
  font-weight: 600;
  text-decoration: underline;
  text-decoration-color: rgba(142, 167, 255, .45);
  text-decoration-thickness: 1px;
  text-underline-offset: .3em;
  transition: color var(--duration-fast) var(--ease-standard);
}

.hero__repository-links a:hover,
.text-link:hover {
  color: var(--color-primary);
}

.hero__versions {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  margin: 1.5rem 0 0;
  color: var(--color-muted);
  font-size: .875rem;
}

.hero__versions span {
  display: inline-flex;
  align-items: center;
  min-height: 2rem;
  padding: .35rem .75rem;
  border: 1px solid rgba(185, 192, 207, .12);
  border-radius: var(--radius-pill);
  background: rgba(26, 31, 41, .72);
}

.hero__versions strong {
  color: var(--color-text);
  font-weight: 600;
}

.device-stage {
  position: relative;
  --scene-x: 0;
  --scene-y: 0;
  perspective: 1100px;
  min-width: 0;
  height: clamp(27rem, 44vw, 34rem);
}

.device-stage::before {
  position: absolute;
  right: 0;
  bottom: 3rem;
  width: 86%;
  height: 76%;
  border-radius: 50%;
  background: rgba(88, 216, 244, .08);
  filter: blur(3.5rem);
  content: "";
  pointer-events: none;
}

.device-stage::after {
  position: absolute;
  top: 7%;
  right: 3%;
  width: 86%;
  height: 78%;
  border: 1px solid rgba(142, 167, 255, .12);
  border-radius: 50%;
  content: "";
  opacity: .75;
  pointer-events: none;
  transform: rotate(-10deg);
  animation: stage-orbit 14s ease-in-out infinite;
}

.device {
  position: absolute;
  border: 1px solid rgba(185, 192, 207, .2);
  background: #05070a;
  box-shadow: 0 18px 48px rgba(0, 0, 0, .34);
}

.device__screen {
  position: relative;
  width: 100%;
  height: 100%;
  overflow: hidden;
}

.device--tv {
  top: 2.75rem;
  right: 0;
  width: 94%;
  aspect-ratio: 16 / 9;
  padding: .5rem;
  border-radius: 1.5rem;
  transform: translate3d(calc(var(--scene-x) * 10px), calc(var(--scene-y) * 7px), 0)
    rotateY(calc(var(--scene-x) * -1.35deg))
    rotateX(calc(var(--scene-y) * 0.8deg));
  transform-style: preserve-3d;
  transition: transform 700ms var(--ease-standard);
}

.device--tv .device__screen {
  border-radius: 1.05rem;
  background:
    radial-gradient(circle at 71% 35%, rgba(88, 216, 244, .4), transparent 14rem),
    radial-gradient(circle at 58% 72%, rgba(142, 167, 255, .32), transparent 12rem),
    linear-gradient(118deg, #101520 0%, #1a283d 48%, #0a0e14 100%);
}

.device--tv .device__screen::before {
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(6, 8, 12, .94) 0%, rgba(6, 8, 12, .57) 43%, rgba(6, 8, 12, .06) 76%);
  content: "";
}

.device--tv .device__screen::after {
  position: absolute;
  right: 11%;
  bottom: -8%;
  width: 39%;
  aspect-ratio: .76;
  border-radius: 48% 48% 12% 12%;
  background: linear-gradient(145deg, rgba(243, 246, 255, .28), rgba(142, 167, 255, .06));
  box-shadow: -3rem -1rem 6rem rgba(88, 216, 244, .11);
  content: "";
  transform: rotate(5deg);
}

.tv-ui__topbar {
  position: absolute;
  z-index: 2;
  top: 1.125rem;
  right: 1.25rem;
  left: 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: rgba(243, 246, 255, .82);
  font-size: .52rem;
  letter-spacing: .12em;
}

.tv-ui__brand {
  font-weight: 700;
}

.tv-ui__clock {
  color: rgba(243, 246, 255, .62);
}

.tv-ui__rail {
  position: absolute;
  z-index: 2;
  top: 4rem;
  bottom: 1.5rem;
  left: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: .65rem;
}

.tv-ui__rail i {
  width: .35rem;
  height: .35rem;
  border-radius: 50%;
  background: rgba(243, 246, 255, .28);
}

.tv-ui__rail .is-selected {
  height: 1.15rem;
  border-radius: var(--radius-pill);
  background: var(--color-accent);
}

.tv-ui__content {
  position: absolute;
  z-index: 2;
  top: 26%;
  right: 8%;
  left: 11%;
  display: grid;
  justify-items: start;
}

.tv-ui__eyebrow {
  margin-bottom: .45rem;
  color: var(--color-accent);
  font-size: .42rem;
  font-weight: 700;
  letter-spacing: .13em;
}

.tv-ui__title {
  font-size: clamp(1.05rem, 2.4vw, 1.8rem);
  line-height: 1;
  letter-spacing: -.04em;
}

.tv-ui__meta {
  margin-top: .45rem;
  color: rgba(243, 246, 255, .68);
  font-size: .45rem;
}

.tv-ui__progress {
  width: 32%;
  height: 3px;
  margin-top: .75rem;
  overflow: hidden;
  border-radius: var(--radius-pill);
  background: rgba(243, 246, 255, .18);
}

.tv-ui__progress span {
  display: block;
  width: 64%;
  height: 100%;
  border-radius: inherit;
  background: var(--color-accent);
}

.tv-ui__posters {
  display: flex;
  width: 72%;
  gap: .55rem;
  margin-top: 1.1rem;
}

.tv-ui__poster {
  display: block;
  flex: 1;
  aspect-ratio: 1.65;
  border: 1px solid rgba(243, 246, 255, .08);
  border-radius: .35rem;
  background:
    linear-gradient(135deg, rgba(142, 167, 255, .27), rgba(88, 216, 244, .05)),
    #1a1f29;
}

.tv-ui__poster:nth-child(2) {
  background:
    linear-gradient(135deg, rgba(88, 216, 244, .19), rgba(142, 167, 255, .07)),
    #151b24;
}

.tv-ui__poster:nth-child(3) {
  background:
    linear-gradient(135deg, rgba(243, 246, 255, .13), rgba(88, 216, 244, .06)),
    #10151d;
}

.tv-ui__poster--active {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.device--phone {
  right: 4%;
  bottom: 0;
  z-index: 4;
  width: clamp(9rem, 22vw, 12.25rem);
  aspect-ratio: .49;
  padding: .38rem;
  border-radius: 2.1rem;
  transform: translate3d(calc(var(--scene-x) * 15px), calc(var(--scene-y) * 10px), 0)
    rotateY(calc(var(--scene-x) * -2deg))
    rotateX(calc(var(--scene-y) * 1.1deg));
  transform-style: preserve-3d;
  transition: transform 700ms var(--ease-standard);
}

.device--phone .device__screen {
  border-radius: 1.75rem;
  background: #f5f7fa;
  color: #111827;
}

.device__speaker {
  position: absolute;
  z-index: 6;
  top: .68rem;
  left: 50%;
  width: 32%;
  height: .7rem;
  border-radius: var(--radius-pill);
  background: #05070a;
  transform: translateX(-50%);
}

.phone-ui__status {
  position: absolute;
  z-index: 2;
  top: .8rem;
  right: .8rem;
  left: .8rem;
  display: flex;
  justify-content: space-between;
  color: rgba(255, 255, 255, .9);
  font-size: .38rem;
  font-weight: 700;
}

.phone-ui__hero {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  height: 47%;
  padding: 1rem .75rem .8rem;
  background:
    linear-gradient(to bottom, transparent 38%, rgba(231, 236, 245, .72) 76%, #f5f7fa 100%),
    radial-gradient(circle at 68% 24%, rgba(88, 216, 244, .88), transparent 34%),
    linear-gradient(135deg, #182336, #6f83d0 54%, #b7e7ef);
}

.phone-ui__brand {
  position: absolute;
  top: 1.8rem;
  left: .7rem;
  color: white;
  font-size: .36rem;
  font-weight: 700;
  letter-spacing: .13em;
}

.phone-ui__hero strong {
  font-size: .8rem;
  line-height: 1.1;
}

.phone-ui__hero > span:last-child {
  margin-top: .25rem;
  color: #556070;
  font-size: .35rem;
}

.phone-ui__library {
  padding: .1rem .7rem 2.1rem;
  font-size: .42rem;
  font-weight: 700;
}

.phone-ui__library > span {
  display: block;
  margin: .6rem 0 .35rem;
}

.phone-ui__library > div {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: .35rem;
}

.phone-ui__library i {
  display: block;
  aspect-ratio: 1.55;
  border-radius: .42rem;
  background: linear-gradient(135deg, #27354c, #8ea7ff);
}

.phone-ui__library i:nth-child(2) {
  background: linear-gradient(135deg, #18313a, #58d8f4);
}

.phone-ui__nav {
  position: absolute;
  right: .65rem;
  bottom: .55rem;
  left: .65rem;
  display: flex;
  align-items: center;
  justify-content: space-around;
  height: 1.55rem;
  border: 1px solid rgba(41, 50, 65, .12);
  border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, .84);
  box-shadow: 0 5px 16px rgba(17, 24, 39, .14);
}

.phone-ui__nav i {
  width: .4rem;
  height: .4rem;
  border: 1.5px solid #556070;
  border-radius: 50%;
}

.phone-ui__nav i:first-child {
  border-color: #356cff;
  background: #356cff;
}

.device-stage__bridge {
  position: absolute;
  z-index: 5;
  right: 25%;
  bottom: 2rem;
  display: inline-flex;
  align-items: center;
  min-height: 2rem;
  gap: .5rem;
  padding: .4rem .7rem;
  border: 1px solid rgba(88, 216, 244, .22);
  border-radius: var(--radius-pill);
  background: rgba(18, 22, 29, .9);
  box-shadow: 0 8px 24px rgba(0, 0, 0, .24);
  color: var(--color-muted);
  font-size: .52rem;
  font-weight: 700;
  letter-spacing: .1em;
  backdrop-filter: blur(12px);
}

.device-stage__bridge i {
  width: .45rem;
  height: .45rem;
  border-radius: 50%;
  background: var(--color-accent);
  box-shadow: 0 0 0 4px rgba(88, 216, 244, .12);
}

.trust-strip {
  display: flex;
  align-items: center;
  justify-content: center;
  width: min(calc(100% - (2 * var(--page-gutter))), var(--content-width));
  min-height: 4rem;
  gap: clamp(1rem, 4vw, 3rem);
  margin: 0 auto .5rem;
  padding: 1rem 1.5rem;
  border: 1px solid rgba(185, 192, 207, .1);
  border-radius: var(--radius-panel);
  background: var(--color-surface);
  color: var(--color-muted);
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: .1em;
}

.section {
  width: min(100%, var(--content-width));
  margin: 0 auto;
  padding: clamp(4.25rem, 8vw, 6rem) var(--page-gutter);
  scroll-margin-top: 6rem;
}

.section__heading {
  max-width: 46rem;
  margin-bottom: clamp(1.75rem, 4vw, 2.5rem);
}

.section__heading--wide {
  max-width: 58rem;
}

.section__heading h2,
.download-panel h2 {
  margin-bottom: 1.25rem;
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  letter-spacing: -.035em;
}

.section__heading > p:last-child,
.download-panel__copy > p:last-child {
  margin-bottom: 0;
  color: var(--color-muted);
  font-size: 1.0625rem;
}

.playback-route {
  position: relative;
  overflow: hidden;
  display: grid;
  grid-template-columns: minmax(10rem, .65fr) minmax(3rem, .18fr) minmax(0, 1.8fr);
  align-items: center;
  gap: 1.5rem;
  padding: clamp(1.5rem, 4vw, 2.5rem);
  border: 1px solid var(--color-outline);
  border-radius: var(--radius-panel);
  background:
    radial-gradient(circle at 15% 45%, rgba(142, 167, 255, .09), transparent 18rem),
    var(--color-surface);
  box-shadow: 0 16px 40px rgba(0, 0, 0, .18);
}

.playback-route__source {
  display: grid;
  gap: .35rem;
}

.playback-route__source span {
  color: var(--color-accent);
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: .12em;
}

.playback-route__source strong {
  font-size: 1.5rem;
  line-height: 1.25;
}

.playback-route__line {
  position: relative;
  display: block;
  width: 100%;
  height: 1px;
  background: var(--color-outline);
}

.playback-route__line::after {
  position: absolute;
  top: 50%;
  right: -.1rem;
  width: .5rem;
  height: .5rem;
  border-top: 1px solid var(--color-accent);
  border-right: 1px solid var(--color-accent);
  content: "";
  transform: translateY(-50%) rotate(45deg);
}

.playback-route__engines {
  display: grid;
  gap: .75rem;
}

.engine-card {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 1rem;
  min-height: 8rem;
  padding: 1.25rem;
  border: 1px solid rgba(185, 192, 207, .1);
  border-radius: var(--radius-card);
  background: var(--color-raised);
  transition:
    transform var(--duration-standard) var(--ease-standard),
    border-color var(--duration-standard) var(--ease-standard),
    background-color var(--duration-standard) var(--ease-standard);
}

.engine-card--accent {
  border-color: rgba(88, 216, 244, .3);
}

.engine-card__index {
  display: grid;
  place-items: center;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 50%;
  background: rgba(142, 167, 255, .12);
  color: var(--color-primary);
  font-size: .75rem;
  font-weight: 700;
}

.engine-card h3 {
  margin-bottom: .35rem;
  font-size: 1.25rem;
}

.engine-card p {
  margin-bottom: 0;
  color: var(--color-muted);
  font-size: .9375rem;
}

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: .4rem;
}

.tag-row span {
  display: inline-flex;
  align-items: center;
  min-height: 1.75rem;
  padding: .25rem .6rem;
  border: 1px solid rgba(88, 216, 244, .18);
  border-radius: var(--radius-pill);
  background: rgba(88, 216, 244, .06);
  color: var(--color-accent);
  font-size: .625rem;
  font-weight: 700;
  letter-spacing: .08em;
}

.playback-route__note {
  grid-column: 3;
  margin: -.25rem 0 0;
  color: var(--color-muted);
  font-size: .875rem;
}

.iso-feature {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(15rem, .65fr);
  align-items: center;
  gap: 2rem;
  margin-bottom: 1rem;
  padding: clamp(1.5rem, 4vw, 2.5rem);
  border: 1px solid rgba(142, 167, 255, .28);
  border-radius: var(--radius-panel);
  background:
    radial-gradient(circle at 86% 40%, rgba(88, 216, 244, .12), transparent 18rem),
    linear-gradient(135deg, rgba(142, 167, 255, .07), transparent 52%),
    var(--color-surface);
  overflow: hidden;
}

.iso-feature__copy h3 {
  max-width: 22ch;
  margin: 1rem 0;
  font-size: clamp(1.6rem, 3vw, 2.25rem);
}

.iso-feature__copy p {
  max-width: 42rem;
  margin-bottom: 1.25rem;
  color: var(--color-muted);
}

.feature-badge {
  display: inline-flex;
  align-items: center;
  min-height: 2rem;
  padding: .35rem .75rem;
  border-radius: var(--radius-pill);
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: .08em;
}

.feature-badge--experimental {
  background: var(--color-warning);
  color: var(--color-on-warning);
}

.disc-visual {
  position: relative;
  display: grid;
  place-items: center;
  min-height: 16rem;
}

.disc-visual__disc {
  position: absolute;
  display: block;
  width: 13rem;
  height: 13rem;
  border: 1px solid rgba(243, 246, 255, .2);
  border-radius: 50%;
  background:
    radial-gradient(circle, var(--color-background) 0 8%, transparent 8.5% 13%, rgba(243, 246, 255, .12) 13.5% 14%, transparent 14.5%),
    conic-gradient(from 45deg, rgba(142, 167, 255, .12), rgba(88, 216, 244, .42), rgba(243, 246, 255, .1), rgba(142, 167, 255, .34), rgba(142, 167, 255, .12));
  box-shadow: 0 0 3rem rgba(88, 216, 244, .1);
}

.disc-visual__route {
  position: absolute;
  right: 0;
  bottom: 1rem;
  left: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: .65rem;
}

.disc-visual__route span {
  display: grid;
  place-items: center;
  min-width: 3rem;
  height: 2rem;
  padding: 0 .6rem;
  border: 1px solid var(--color-outline);
  border-radius: var(--radius-pill);
  background: rgba(18, 22, 29, .9);
  color: var(--color-text);
  font-size: .625rem;
  font-weight: 700;
}

.disc-visual__route i {
  width: 2rem;
  height: 1px;
  background: var(--color-accent);
}

.iso-feature__caveat {
  grid-column: 1 / -1;
  margin: 0;
  padding-top: 1rem;
  border-top: 1px solid rgba(185, 192, 207, .1);
  color: var(--color-muted);
  font-size: .875rem;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: 1rem;
}

.feature-card {
  grid-column: span 4;
  min-height: 15rem;
  padding: 1.75rem;
  border: 1px solid rgba(185, 192, 207, .12);
  border-radius: var(--radius-card);
  background: var(--color-surface);
  transition:
    transform var(--duration-standard) var(--ease-standard),
    border-color var(--duration-standard) var(--ease-standard),
    background-color var(--duration-standard) var(--ease-standard);
}

.feature-card--wide {
  grid-column: span 8;
}

.feature-card__kicker {
  display: block;
  margin-bottom: 2.5rem;
  color: var(--color-accent);
  font-size: .6875rem;
  font-weight: 700;
  letter-spacing: .12em;
}

.feature-card h3 {
  margin-bottom: .8rem;
  font-size: 1.35rem;
}

.feature-card p {
  margin-bottom: 0;
  color: var(--color-muted);
}

.capability-list {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  margin-top: 1.5rem;
}

.capability-list span {
  padding: .4rem .7rem;
  border-radius: var(--radius-pill);
  background: var(--color-raised);
  color: var(--color-muted);
  font-size: .75rem;
}

.connection-flow {
  display: flex;
  align-items: center;
  margin-top: 2rem;
}

.connection-flow span {
  display: grid;
  place-items: center;
  min-height: 2rem;
  padding: .35rem .65rem;
  border: 1px solid var(--color-outline);
  border-radius: var(--radius-pill);
  color: var(--color-muted);
  font-size: .625rem;
  font-weight: 700;
}

.connection-flow i {
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, var(--color-outline), var(--color-accent), var(--color-outline));
}

.platform-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.platform-card {
  position: relative;
  display: flex;
  flex-direction: column;
  min-height: 24rem;
  padding: clamp(1.5rem, 4vw, 2.25rem);
  border: 1px solid var(--color-outline);
  border-radius: var(--radius-panel);
  background: var(--color-surface);
  transition:
    transform var(--duration-standard) var(--ease-standard),
    border-color var(--duration-standard) var(--ease-standard),
    background-color var(--duration-standard) var(--ease-standard);
}

.platform-card::before {
  position: absolute;
  top: 0;
  right: 2rem;
  left: 2rem;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(142, 167, 255, .74), transparent);
  content: "";
}

.platform-card--tv::before {
  background: linear-gradient(90deg, transparent, rgba(88, 216, 244, .74), transparent);
}

.platform-card--windows::before {
  background: linear-gradient(90deg, transparent, rgba(213, 197, 255, .74), transparent);
}

.platform-card__system {
  align-self: flex-start;
  min-height: 2rem;
  margin-bottom: 2rem;
  padding: .35rem .75rem;
  border: 1px solid rgba(142, 167, 255, .18);
  border-radius: var(--radius-pill);
  background: rgba(142, 167, 255, .08);
  color: var(--color-primary);
  font-size: .8125rem;
  font-weight: 700;
  letter-spacing: .08em;
}

.platform-card h3 {
  margin-bottom: .8rem;
  font-size: 1.75rem;
}

.platform-card > p {
  color: var(--color-muted);
}

.platform-card__list {
  display: grid;
  gap: .7rem;
  margin: .75rem 0 2rem;
  padding: 0;
  color: var(--color-muted);
  font-size: .875rem;
  list-style: none;
}

.platform-card__list li {
  position: relative;
  padding-left: 1.25rem;
}

.platform-card__list li::before {
  position: absolute;
  top: .63rem;
  left: 0;
  width: .4rem;
  height: .4rem;
  border-radius: 50%;
  background: var(--color-accent);
  content: "";
}

.platform-card__action {
  display: inline-flex;
  align-items: center;
  min-height: 3rem;
  margin-top: auto;
  color: var(--color-primary);
  font-size: .9375rem;
  font-weight: 700;
}

.platform-card--windows .platform-card__system {
  border-color: rgba(213, 197, 255, .18);
  background: rgba(213, 197, 255, .08);
  color: var(--color-future);
}

.platform-card--future {
  cursor: default;
}

.platform-card--future .platform-card__action {
  color: var(--color-future);
}

.section--servers {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(20rem, .8fr);
  align-items: center;
  gap: clamp(2rem, 7vw, 6rem);
}

.section--servers .section__heading {
  margin-bottom: 0;
}

.server-stack {
  position: relative;
  min-height: 20rem;
}

.server-card {
  position: absolute;
  right: 0;
  left: 0;
  display: grid;
  grid-template-columns: 1fr auto auto;
  align-items: center;
  min-height: 6.5rem;
  gap: 1rem;
  padding: 1.25rem 1.5rem;
  border: 1px solid var(--color-outline);
  border-radius: var(--radius-card);
  background: var(--color-surface);
  box-shadow: 0 14px 36px rgba(0, 0, 0, .2);
}

.server-card span {
  color: var(--color-muted);
  font-size: .6875rem;
  font-weight: 700;
  letter-spacing: .12em;
}

.server-card strong {
  font-size: 1rem;
}

.server-card i {
  width: .65rem;
  height: .65rem;
  border-radius: 50%;
  background: var(--color-accent);
  box-shadow: 0 0 0 5px rgba(88, 216, 244, .08);
}

.server-card--home {
  top: 0;
  transform: translateX(-2rem) rotate(-2deg);
}

.server-card--media {
  top: 6.2rem;
  z-index: 2;
  transform: translateX(1rem);
}

.server-card--private {
  top: 12.4rem;
  transform: translateX(-.5rem) rotate(1.5deg);
}

.server-card--private i {
  background: var(--color-primary);
  box-shadow: 0 0 0 5px rgba(142, 167, 255, .08);
}

.privacy-note {
  grid-column: 1 / -1;
  margin: 0;
  padding: 1rem 1.25rem;
  border-left: 3px solid var(--color-accent);
  border-radius: .25rem var(--radius-card) var(--radius-card) .25rem;
  background: rgba(88, 216, 244, .05);
  color: var(--color-muted);
  font-size: .875rem;
}

.download-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: end;
  gap: 2rem 3rem;
  margin-block: 4rem 6rem;
  padding: clamp(2rem, 5vw, 3.5rem);
  border: 1px solid rgba(142, 167, 255, .28);
  border-radius: var(--radius-panel);
  background:
    radial-gradient(circle at 92% 18%, rgba(88, 216, 244, .12), transparent 20rem),
    radial-gradient(circle at 4% 100%, rgba(142, 167, 255, .1), transparent 22rem),
    var(--color-surface);
  box-shadow: 0 20px 48px rgba(0, 0, 0, .2);
}

.download-panel__copy {
  max-width: 44rem;
}

.download-panel__copy h2 {
  margin-bottom: 1rem;
}

.download-panel__actions {
  display: grid;
  min-width: 13rem;
  gap: .75rem;
}

.download-panel__versions {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem 1.25rem;
  margin: 0;
  color: var(--color-muted);
  font-size: .875rem;
}

.download-panel__links {
  display: flex;
  justify-content: flex-end;
  gap: 1.25rem;
}

.compatibility-note {
  grid-column: 1 / -1;
  padding-top: 1.25rem;
  border-top: 1px solid rgba(185, 192, 207, .12);
}

.compatibility-note summary {
  width: fit-content;
  min-height: 3rem;
  padding: .7rem 1rem;
  border-radius: var(--radius-pill);
  color: var(--color-text);
  font-weight: 600;
  cursor: pointer;
}

.compatibility-note__grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
  padding-top: 1rem;
}

.compatibility-note__grid p {
  margin: 0;
  padding: 1rem;
  border-radius: 1rem;
  background: var(--color-raised);
  color: var(--color-muted);
  font-size: .875rem;
}

.site-footer {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: center;
  width: min(100%, var(--content-width));
  gap: .25rem 2rem;
  margin: 0 auto;
  padding: 2rem var(--page-gutter) 3rem;
  color: var(--color-muted);
}

.brand--footer {
  grid-row: span 2;
}

.site-footer p {
  margin: 0;
  font-size: .875rem;
}

.site-footer__links {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem 1.25rem;
  font-size: .875rem;
}

.site-footer__links a {
  min-height: 2rem;
  color: var(--color-muted);
  text-decoration: underline;
  text-decoration-color: rgba(185, 192, 207, .28);
  text-underline-offset: .25em;
}

.site-footer__links a:hover {
  color: var(--color-primary);
}

.noscript-notice {
  position: fixed;
  z-index: 80;
  right: 1rem;
  bottom: 1rem;
  left: 1rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .75rem 1rem;
  padding: 1rem;
  border: 1px solid var(--color-outline);
  border-radius: var(--radius-card);
  background: var(--color-raised);
  box-shadow: 0 16px 40px rgba(0, 0, 0, .32);
}

.noscript-notice p {
  flex-basis: 100%;
  margin: 0;
}

.noscript-notice a {
  color: var(--color-primary);
  font-weight: 600;
  text-decoration: underline;
}

[data-reveal] {
  opacity: 1;
  transform: none;
}

.js [data-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition:
    opacity var(--duration-standard) var(--ease-standard),
    transform var(--duration-standard) var(--ease-standard);
}

.js [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

@media (hover: hover) {
  .feature-card:hover,
  .platform-card:hover {
    border-color: rgba(142, 167, 255, .4);
    background: var(--color-surface-hover);
    transform: translateY(-2px);
  }
}

@media (max-width: 1024px) {
  .hero {
    grid-template-columns: minmax(0, .9fr) minmax(27rem, 1.1fr);
    gap: 2rem;
  }

  .device-stage {
    height: 28rem;
  }

  .engine-card {
    grid-template-columns: auto minmax(0, 1fr);
  }

  .engine-card .tag-row {
    grid-column: 2;
  }

  .feature-card,
  .feature-card--wide {
    grid-column: span 6;
  }

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

  .compatibility-note__grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 900px) {
  .hero {
    grid-template-columns: 1fr;
    min-height: 0;
    padding-top: 8.5rem;
  }

  .hero__content {
    max-width: 42rem;
  }

  .hero h1 {
    max-width: 11ch;
  }

  .device-stage {
    width: min(100%, 43rem);
    height: clamp(27rem, 68vw, 34rem);
    margin: 0 auto;
  }

  .section--servers {
    grid-template-columns: 1fr;
  }

  .server-stack {
    width: min(100%, 34rem);
    margin: 0 auto;
  }

  .download-panel {
    grid-template-columns: 1fr;
    align-items: start;
  }

  .download-panel__actions {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    width: 100%;
  }

  .download-panel__links {
    justify-content: flex-start;
  }
}

@media (max-width: 768px) {
  :root {
    --page-gutter: 1.25rem;
  }

  .site-header {
    top: .5rem;
  }

  .site-header__inner {
    position: relative;
  }

  .site-nav {
    display: flex;
    flex-wrap: wrap;
    justify-content: flex-end;
  }

  .js .menu-toggle {
    display: grid;
  }

  .js .site-nav {
    position: absolute;
    top: calc(100% + .5rem);
    right: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    width: min(20rem, calc(100vw - 2.5rem));
    max-height: calc(100vh - 4.5rem);
    max-height: calc(100dvh - 4.5rem);
    padding: .75rem;
    border: 1px solid var(--color-outline);
    border-radius: var(--radius-card);
    background: rgba(18, 22, 29, .97);
    box-shadow: 0 18px 42px rgba(0, 0, 0, .34);
    overflow-y: auto;
    backdrop-filter: blur(18px) saturate(135%);
  }

  .js .site-nav.is-open {
    display: flex;
  }

  .js .site-nav a,
  .js .site-nav .language-toggle {
    justify-content: flex-start;
    width: 100%;
    padding-inline: 1rem;
  }

  .site-nav .nav-download {
    margin: .25rem 0 0;
  }

  .language-toggle {
    border: 0;
  }

  html:not(.js) .site-header {
    position: relative;
    top: 0;
    height: auto;
    padding-top: .5rem;
  }

  html:not(.js) .site-header__inner {
    flex-wrap: wrap;
  }

  html:not(.js) .site-nav {
    flex: 1 1 100%;
    justify-content: flex-start;
    margin-top: .25rem;
  }

  html:not(.js) .hero {
    padding-top: 3rem;
  }

  .playback-route {
    grid-template-columns: 1fr;
  }

  .playback-route__line {
    width: 1px;
    height: 2rem;
    margin-left: 1.25rem;
  }

  .playback-route__line::after {
    top: auto;
    right: auto;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%) rotate(135deg);
  }

  .playback-route__note {
    grid-column: 1;
  }

  .iso-feature {
    grid-template-columns: 1fr;
  }

  .disc-visual {
    min-height: 13rem;
  }

  .disc-visual__disc {
    width: 11rem;
    height: 11rem;
  }

  .platform-grid {
    grid-template-columns: 1fr;
  }

  .site-footer {
    grid-template-columns: 1fr;
  }

  .brand--footer {
    grid-row: auto;
  }
}

@media (max-width: 600px) {
  .hero {
    padding-bottom: 3rem;
  }

  .hero__actions .button {
    flex: 1 1 100%;
  }

  .device-stage {
    height: 23rem;
  }

  .device--tv {
    top: 1.5rem;
    width: 100%;
  }

  .device--phone {
    right: 3%;
    width: 8rem;
  }

  .device-stage__bridge {
    right: 34%;
    bottom: .9rem;
  }

  .feature-card,
  .feature-card--wide {
    grid-column: 1 / -1;
    min-height: 0;
  }

  .download-panel__actions {
    grid-template-columns: 1fr;
  }

  .download-panel__links {
    flex-direction: column;
    gap: .75rem;
  }

  .server-card--home,
  .server-card--media,
  .server-card--private {
    transform: none;
  }
}

@media (max-width: 420px) {
  .brand {
    gap: .55rem;
    letter-spacing: .11em;
  }

  .hero h1 {
    font-size: 2.5rem;
  }

  .hero__repository-links {
    flex-direction: column;
  }

  .device-stage {
    height: 20rem;
  }

  .device--tv {
    padding: .32rem;
    border-radius: 1.1rem;
  }

  .device--tv .device__screen {
    border-radius: .82rem;
  }

  .device--phone {
    width: 7rem;
    border-radius: 1.55rem;
  }

  .device--phone .device__screen {
    border-radius: 1.25rem;
  }

  .device__speaker {
    top: .55rem;
  }

  .device-stage__bridge {
    display: none;
  }

  .trust-strip {
    justify-content: flex-start;
    overflow-x: auto;
    scrollbar-width: none;
  }

  .engine-card {
    grid-template-columns: 1fr;
  }

  .engine-card__index {
    width: 2rem;
    height: 2rem;
  }

  .engine-card .tag-row {
    grid-column: 1;
  }

}

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

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: .01ms !important;
    transition-delay: 0ms !important;
  }

  .js [data-reveal] {
    opacity: 1;
    transform: none;
  }
}

@keyframes ambient-orbit {
  0%,
  100% {
    opacity: .48;
    transform: translate3d(0, 0, 0) rotate(-12deg) scale(.98);
  }

  50% {
    opacity: .9;
    transform: translate3d(-2%, 2%, 0) rotate(-6deg) scale(1.03);
  }
}

@keyframes stage-orbit {
  0%,
  100% {
    opacity: .42;
    transform: translate3d(0, 0, 0) rotate(-10deg) scale(.98);
  }

  50% {
    opacity: .82;
    transform: translate3d(1.5%, -1%, 0) rotate(-4deg) scale(1.02);
  }
}

@keyframes signal-sweep {
  from {
    background-position: 200% 0;
  }

  to {
    background-position: -20% 0;
  }
}

@keyframes signal-dot-x {
  0% {
    left: 0;
    opacity: 0;
  }

  14% {
    opacity: 1;
  }

  86% {
    opacity: 1;
  }

  100% {
    left: calc(100% - .35rem);
    opacity: 0;
  }
}

@keyframes signal-dot-y {
  0% {
    bottom: 0;
    opacity: 0;
  }

  14% {
    opacity: 1;
  }

  86% {
    opacity: 1;
  }

  100% {
    bottom: calc(100% - .35rem);
    opacity: 0;
  }
}

.playback-route__line {
  background: linear-gradient(90deg, var(--color-outline), rgba(88, 216, 244, .82), var(--color-outline));
  background-size: 220% 100%;
  animation: signal-sweep 2.8s linear infinite;
}

.playback-route__line::before {
  position: absolute;
  top: 50%;
  left: 0;
  width: .35rem;
  height: .35rem;
  border-radius: 50%;
  background: var(--color-accent);
  box-shadow: 0 0 .75rem rgba(88, 216, 244, .9);
  content: "";
  transform: translateY(-50%);
  animation: signal-dot-x 2.8s ease-in-out infinite;
}

@media (hover: hover) {
  .engine-card:hover {
    border-color: rgba(88, 216, 244, .32);
    background: var(--color-surface-hover);
    transform: translateY(-3px);
  }

  .feature-card:hover,
  .platform-card:hover {
    box-shadow: 0 18px 44px rgba(0, 0, 0, .22);
  }

  .platform-card.platform-card--future:hover {
    border-color: var(--color-outline);
    background: var(--color-surface);
    box-shadow: none;
    transform: none;
  }
}

@media (max-width: 768px) {
  .playback-route__line {
    background: linear-gradient(180deg, var(--color-outline), rgba(88, 216, 244, .82), var(--color-outline));
    background-size: 100% 220%;
    animation-name: signal-sweep-y;
  }

  .playback-route__line::before {
    top: auto;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    animation-name: signal-dot-y;
  }
}

@keyframes signal-sweep-y {
  from {
    background-position: 0 200%;
  }

  to {
    background-position: 0 -20%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .hero__ambient::before,
  .device-stage::after,
  .playback-route__line,
  .playback-route__line::before {
    animation: none !important;
  }

  .device--tv,
  .device--phone {
    transform: none !important;
  }

  .device-stage {
    --scene-x: 0 !important;
    --scene-y: 0 !important;
  }
}