:root {
  color-scheme: light;
  --black: #050505;
  --ink: #11110f;
  --ink-soft: #30302b;
  --muted: #66645d;
  --paper: #f4f1e8;
  --paper-light: #fffdf6;
  --line: #d7d1c3;
  --orange: #ff5633;
  --accent-text: #b8321e;
  --blue: #1f55ff;
  --shadow: 0 30px 100px rgba(0, 0, 0, 0.24);
  --max: 1180px;

  /* Theme materials. Light is the no-script fallback; the system-dark media
     query below provides the matching first paint before JavaScript resolves
     an explicit or automatic preference. */
  --chrome-bg: rgba(247, 244, 235, 0.88);
  --chrome-text: #171713;
  --chrome-muted: rgba(23, 23, 19, 0.6);
  --chrome-line: rgba(23, 23, 19, 0.13);
  --chrome-control: rgba(255, 253, 246, 0.72);
  --chrome-control-hover: rgba(255, 253, 246, 0.98);
  --section-rule: #24241f;
  --tech-bg: #e8e3d7;
  --tech-surface: #f7f3e9;
  --tech-surface-strong: #fffdf7;
  --tech-text: #20201c;
  --tech-soft: rgba(32, 32, 28, 0.66);
  --tech-muted: rgba(32, 32, 28, 0.45);
  --tech-line: rgba(32, 32, 28, 0.17);
  --tech-line-strong: rgba(32, 32, 28, 0.28);
  --tech-grid: rgba(32, 32, 28, 0.055);
  --tech-shadow: 0 30px 80px rgba(55, 49, 39, 0.15);
  --float-bg: rgba(255, 253, 247, 0.96);
  --float-text: #171713;
  --float-soft: rgba(23, 23, 19, 0.58);
  --float-line: rgba(23, 23, 19, 0.15);
  --float-shadow: 0 24px 64px rgba(55, 49, 39, 0.19);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 76px;
}

body {
  margin: 0;
  overflow-x: hidden;
  background: var(--paper);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.5;
  letter-spacing: 0;
}

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

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

.site-header {
  position: fixed;
  z-index: 30;
  top: 0;
  right: 0;
  left: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  padding: 0 28px;
  color: var(--paper-light);
  background: rgba(5, 5, 5, 0.82);
  border-bottom: 1px solid rgba(244, 241, 232, 0.15);
  backdrop-filter: blur(18px);
}

.brand,
.site-nav,
.header-actions,
.language-toggle {
  display: flex;
  align-items: center;
}

.header-download {
  display: none;
}

.brand {
  gap: 10px;
  font-weight: 850;
}

.brand img {
  width: 32px;
  height: 32px;
  border-radius: 8px;
}

.brand b {
  color: var(--orange);
  font-weight: 850;
}

.site-nav {
  gap: 24px;
  color: rgba(244, 241, 232, 0.7);
  font-size: 0.9rem;
}

.site-nav a {
  transition: color 160ms ease;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--paper-light);
}

.header-actions {
  gap: 22px;
}

.language-toggle {
  position: relative;
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  width: 106px;
  min-height: 38px;
  padding: 3px;
  border: 1px solid rgba(244, 241, 232, 0.18);
  border-radius: 999px;
  background: rgba(244, 241, 232, 0.05);
  color: rgba(244, 241, 232, 0.62);
  font: inherit;
  cursor: pointer;
  overflow: hidden;
  transition: border-color 160ms ease, background 160ms ease;
}

.language-toggle:hover,
.language-toggle:focus-visible {
  border-color: rgba(244, 241, 232, 0.36);
  background: rgba(244, 241, 232, 0.08);
}

.toggle-thumb {
  position: absolute;
  top: 3px;
  bottom: 3px;
  left: 3px;
  width: calc((100% - 6px) / 2);
  border-radius: 999px;
  background: var(--paper-light);
  transform: translateX(0);
  transition: transform 240ms cubic-bezier(0.22, 1, 0.36, 1);
}

body[data-language="en"] .toggle-thumb {
  transform: translateX(100%);
}

.toggle-label {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 30px;
  font-size: 0.78rem;
  font-weight: 850;
  line-height: 1;
  transition: color 180ms ease;
}

body[data-language="zh-Hans"] .toggle-label-zh,
body[data-language="zh"] .toggle-label-zh,
body[data-language="en"] .toggle-label-en {
  color: var(--black);
}

body[data-language="zh-Hans"] .toggle-label-en,
body[data-language="zh"] .toggle-label-en,
body[data-language="en"] .toggle-label-zh {
  color: rgba(244, 241, 232, 0.62);
}

.lang-en,
.lang-zh,
.lang-zh-hans,
.lang-zh-hant,
.lang-ja {
  display: none;
}

body[data-language="en"] .lang-en {
  display: inline;
}

body[data-language="zh-Hans"] .lang-zh,
body[data-language="zh-Hans"] .lang-zh-hans,
body[data-language="zh"] .lang-zh {
  display: inline;
}

body[data-language="zh-Hant"] .lang-zh-hant {
  display: inline;
}

body[data-language="ja"] .lang-ja {
  display: inline;
}

.hero {
  position: relative;
  isolation: isolate;
  display: grid;
  grid-template-rows: 1fr auto;
  min-height: 94svh;
  padding: 122px 32px 48px;
  overflow: hidden;
  color: var(--ink);
  background: var(--paper);
}

.hero::before {
  position: absolute;
  top: 64px;
  right: 0;
  left: 0;
  height: 1px;
  content: "";
  background: var(--line);
}

.hero-copy {
  position: relative;
  z-index: 2;
  align-self: center;
  width: min(var(--max), 100%);
  margin: 0 auto;
  min-width: 0;
}

.eyebrow {
  margin: 0 0 16px;
  color: var(--orange);
  font-size: 0.76rem;
  font-weight: 860;
  line-height: 1.2;
  text-transform: uppercase;
}

.hero .eyebrow {
  margin-bottom: 28px;
  color: var(--muted);
  letter-spacing: 0.04em;
}

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

.hero-title {
  display: flex;
  align-items: flex-start;
  gap: 0.08em;
  margin: 0;
  font-size: clamp(7rem, 18vw, 16rem);
  font-weight: 900;
  letter-spacing: -0.075em;
  line-height: 0.68;
}

.hero-title small {
  margin-top: -0.08em;
  color: var(--orange);
  font-size: 0.31em;
  font-weight: 900;
  letter-spacing: -0.08em;
  line-height: 1;
}

body[data-language="ja"] .hero-title-ja {
  display: inline-flex;
  align-items: baseline;
  gap: 0.16em;
  color: var(--accent-text);
  font-size: 0.58em;
  letter-spacing: -0.04em;
  line-height: 0.85;
}

.hero-title-ja b {
  font-weight: 340;
}

.hero-title-ja small {
  margin: 0;
  font-size: 0.43em;
  font-weight: 430;
  letter-spacing: 0.02em;
}

.keep-word {
  white-space: nowrap;
}

h2 {
  max-width: 960px;
  margin-bottom: 0;
  font-size: clamp(2.2rem, 5.4vw, 5rem);
  line-height: 0.98;
}

h3 {
  margin: 0 0 10px;
  font-size: clamp(2.5rem, 7vw, 5.2rem);
  line-height: 0.92;
}

.hero-statement {
  max-width: 900px;
  margin: 58px 0 22px auto;
  font-size: clamp(2.35rem, 5.2vw, 4.8rem);
  font-weight: 740;
  letter-spacing: -0.045em;
  line-height: 1.02;
}

.hero-statement em {
  color: var(--orange);
  font-style: normal;
}

.hero-statement del {
  text-decoration-color: var(--orange);
  text-decoration-thickness: 0.08em;
}

.hero-note {
  max-width: 590px;
  margin: 0 0 30px auto;
  color: var(--muted);
  font-size: 1.05rem;
  overflow-wrap: anywhere;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: flex-end;
  max-width: 590px;
  margin-left: auto;
}

.hero-download-button {
  flex-direction: column;
  gap: 3px;
  line-height: 1.05;
  padding-top: 8px;
  padding-bottom: 8px;
}

.hero-download-version {
  color: rgba(17, 17, 15, 0.65);
  font-size: 0.64rem;
  font-weight: 720;
  line-height: 1;
  letter-spacing: 0.04em;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  padding: 0 18px;
  border: 1px solid currentColor;
  border-radius: 8px;
  font-weight: 850;
  transition: transform 160ms ease, background 160ms ease, border-color 160ms ease;
}

.button:hover,
.button:focus-visible {
  transform: translateY(-1px);
}

.button.primary {
  color: var(--black);
  background: var(--orange);
  border-color: var(--orange);
}

.button.primary:hover,
.button.primary:focus-visible {
  background: #ff704f;
  border-color: #ff704f;
}

.button.secondary {
  color: rgba(244, 241, 232, 0.82);
  border-color: rgba(244, 241, 232, 0.28);
}

.button.secondary:hover,
.button.secondary:focus-visible {
  border-color: rgba(244, 241, 232, 0.62);
}

.hero .button.secondary {
  color: var(--ink);
  border-color: rgba(17, 17, 15, 0.28);
}

.hero .button.secondary:hover,
.hero .button.secondary:focus-visible {
  border-color: var(--ink);
}

.hero-workbench {
  position: absolute;
  z-index: 1;
  top: 50%;
  right: max(32px, calc((100vw - var(--max)) / 2));
  width: clamp(460px, 41vw, 610px);
  height: clamp(330px, 38vw, 460px);
  overflow: hidden;
  color: rgba(244, 241, 232, 0.82);
  background:
    linear-gradient(rgba(244, 241, 232, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(244, 241, 232, 0.035) 1px, transparent 1px),
    rgba(7, 8, 7, 0.84);
  background-size: 38px 38px;
  border: 1px solid rgba(244, 241, 232, 0.16);
  border-radius: 20px;
  box-shadow: 0 42px 120px rgba(0, 0, 0, 0.48);
  transform: translate3d(var(--hero-x, 0), calc(-50% + var(--hero-y, 0)), 0) rotate(-1.5deg);
  transition: transform 260ms ease-out;
}

.hero-workbench::before {
  position: absolute;
  right: -0.12em;
  bottom: -0.26em;
  content: "";
  color: rgba(255, 86, 51, 0.08);
  font-size: clamp(17rem, 28vw, 26rem);
  font-weight: 900;
  line-height: 1;
}

.hero-workbench-bar,
.correction-demo-head,
.correction-target-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.hero-workbench-bar {
  position: relative;
  z-index: 1;
  height: 44px;
  padding: 0 16px;
  color: rgba(244, 241, 232, 0.42);
  border-bottom: 1px solid rgba(244, 241, 232, 0.12);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.62rem;
  letter-spacing: 0.08em;
}

.hero-workbench-bar i {
  width: 6px;
  height: 6px;
  margin-left: auto;
  background: rgba(244, 241, 232, 0.26);
  border-radius: 50%;
}

.hero-workbench-bar i + i {
  margin-left: 5px;
}

.hero-terminal-line {
  position: absolute;
  top: 34%;
  right: 30px;
  left: 30px;
  margin: 0;
  color: rgba(244, 241, 232, 0.45);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: clamp(0.82rem, 1.1vw, 0.98rem);
  line-height: 1.7;
}

.hero-terminal-line b {
  color: var(--orange);
}

.hero-floating-window {
  position: absolute;
  z-index: 2;
  right: 7%;
  bottom: 20%;
  left: 7%;
  display: grid;
  grid-template-columns: 52px 1fr 30px;
  gap: 12px;
  align-items: center;
  min-height: 88px;
  padding: 12px 10px 12px 14px;
  color: var(--ink);
  background: rgba(255, 253, 246, 0.94);
  border: 1px solid rgba(255, 255, 255, 0.68);
  border-radius: 15px;
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(22px);
}

.hero-floating-window p {
  margin: 0;
  font-size: clamp(0.82rem, 1.1vw, 0.98rem);
  line-height: 1.5;
}

.hero-floating-window strong {
  color: var(--orange);
}

.hero-signal,
.correction-demo-activity {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 3px;
}

.hero-signal i,
.correction-demo-activity i {
  width: 3px;
  height: 22px;
  background: var(--orange);
  border-radius: 99px;
  animation: signalFlicker 840ms steps(2, end) infinite alternate;
}

.hero-signal i:nth-child(2),
.correction-demo-activity i:nth-child(4) { height: 34px; animation-delay: -510ms; animation-duration: 690ms; }
.hero-signal i:nth-child(3),
.correction-demo-activity i:nth-child(2) { height: 18px; animation-delay: -170ms; animation-duration: 940ms; }
.hero-signal i:nth-child(4) { height: 40px; animation-delay: -720ms; animation-duration: 760ms; }
.hero-signal i:nth-child(5),
.correction-demo-activity i:nth-child(5) { height: 27px; animation-delay: -330ms; animation-duration: 1020ms; }
.hero-signal i:nth-child(6) { height: 14px; animation-delay: -640ms; animation-duration: 610ms; }
.hero-signal i:nth-child(7),
.correction-demo-activity i:nth-child(3) { height: 31px; animation-delay: -90ms; animation-duration: 880ms; }

.hero-floating-actions,
.correction-float-actions {
  display: grid;
  gap: 5px;
}

.hero-floating-actions span,
.correction-float-actions span {
  display: grid;
  width: 24px;
  height: 22px;
  place-items: center;
  color: rgba(17, 17, 15, 0.54);
  border: 1px solid rgba(17, 17, 15, 0.14);
  border-radius: 7px;
  font-size: 0.72rem;
}

.hero-local-state {
  position: absolute;
  bottom: 17px;
  left: 18px;
  display: flex;
  align-items: center;
  gap: 7px;
  color: rgba(244, 241, 232, 0.4);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.58rem;
  letter-spacing: 0.08em;
}

.hero-local-state i {
  width: 6px;
  height: 6px;
  background: var(--orange);
  border-radius: 50%;
  box-shadow: 0 0 12px rgba(255, 86, 51, 0.78);
}

.hero-strip {
  align-self: end;
  display: grid;
  grid-template-columns: 1.1fr repeat(3, 1fr);
  width: min(var(--max), calc(100% - 64px));
  margin: 54px auto 0;
  border-top: 1px solid rgba(244, 241, 232, 0.2);
}

.hero-strip span,
.hero-strip strong {
  min-height: 58px;
  padding: 16px 18px 0 0;
  color: rgba(244, 241, 232, 0.6);
  border-right: 1px solid rgba(244, 241, 232, 0.12);
  font-size: 0.9rem;
  text-align: left;
}

.hero-strip strong {
  color: rgba(244, 241, 232, 0.86);
}

.hero-utterance {
  position: relative;
  display: grid;
  grid-template-columns: 170px minmax(0, 1fr) auto;
  gap: 28px;
  align-items: baseline;
  width: min(var(--max), 100%);
  margin: 56px auto 0;
  padding: 24px 0 2px;
  border-top: 1px solid var(--ink);
  min-width: 0;
}

.hero-utterance::before {
  position: absolute;
  top: -4px;
  left: 0;
  width: 34px;
  height: 7px;
  content: "";
  background: var(--orange);
}

.hero-utterance-label,
.hero-utterance-meta {
  margin: 0;
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 760;
  line-height: 1.35;
}

.hero-utterance blockquote {
  margin: 0;
  font-size: clamp(1.18rem, 2vw, 1.55rem);
  font-weight: 650;
  letter-spacing: -0.02em;
  line-height: 1.35;
  overflow-wrap: anywhere;
}

.hero-utterance blockquote strong {
  color: var(--orange);
  font-weight: 760;
}

.hero-utterance-meta {
  white-space: nowrap;
  text-transform: uppercase;
}

html .hero .eyebrow {
  font-weight: 520;
  letter-spacing: 0.08em;
}

html .hero-title {
  font-weight: 300;
  letter-spacing: -0.065em;
}

html .hero-title small {
  font-weight: 380;
  letter-spacing: -0.06em;
}

html .hero-statement {
  font-weight: 320;
  letter-spacing: -0.038em;
}

html .hero-statement em {
  font-weight: 390;
}

html .hero-note {
  color: var(--ink-soft);
  font-weight: 360;
}

html .hero-utterance-label,
html .hero-utterance-meta {
  font-weight: 500;
}

html .hero-utterance blockquote {
  font-weight: 360;
  letter-spacing: -0.015em;
}

html .hero-utterance blockquote strong {
  font-weight: 480;
}

html .hero .button {
  font-weight: 590;
}

.manifesto-section,
.correction-section,
.scope-section,
.memory-section,
.privacy-section,
.download-section {
  width: min(var(--max), calc(100% - 64px));
  margin: 0 auto;
}

.manifesto-section {
  padding: 110px 0 94px;
}

.manifesto-section h2 {
  max-width: 1040px;
}

.manifesto-section p:last-child {
  max-width: 720px;
  margin: 28px 0 0 auto;
  color: var(--muted);
  font-size: 1.24rem;
}

.correction-section,
.scope-section,
.memory-section,
.privacy-section,
.download-section {
  padding: 100px 0;
  border-top: 1px solid var(--ink);
}

.section-intro {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 48px;
  align-items: start;
  margin-bottom: 52px;
}

.scope-table span,
.download-list span,
.memory-lines > span {
  color: var(--orange);
  font-size: 0.76rem;
  font-weight: 860;
  text-transform: uppercase;
}

.site-nav .lang,
.button .lang,
.scope-table strong .lang,
.scope-table p .lang,
.download-list strong .lang,
.site-footer .lang {
  color: inherit;
  font-size: inherit;
  font-weight: inherit;
  text-transform: none;
}

.correction-section {
  padding: 100px 0;
  border-top: 1px solid var(--ink);
}

.correction-copy {
  margin-bottom: 40px;
}

.correction-copy .eyebrow {
  margin: 0;
}

.correction-demo {
  position: relative;
  min-height: 560px;
  overflow: hidden;
  color: var(--paper-light);
  background:
    linear-gradient(rgba(244, 241, 232, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(244, 241, 232, 0.04) 1px, transparent 1px),
    var(--black);
  background-size: 48px 48px;
  border: 1px solid var(--ink);
  border-radius: 2px;
}

.correction-demo::after {
  position: absolute;
  right: -0.08em;
  bottom: -0.28em;
  content: "↵";
  color: rgba(255, 86, 51, 0.07);
  font-size: 25rem;
  font-weight: 900;
  line-height: 1;
}

.correction-demo-head {
  position: relative;
  z-index: 2;
  height: 48px;
  padding: 0 18px;
  color: rgba(244, 241, 232, 0.42);
  border-bottom: 1px solid rgba(244, 241, 232, 0.14);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.62rem;
  letter-spacing: 0.08em;
}

.correction-demo-activity i {
  width: 2px;
  height: 10px;
  opacity: 0.58;
}

.correction-target {
  position: absolute;
  z-index: 1;
  top: 92px;
  right: 5%;
  left: 5%;
  min-height: 180px;
  background: rgba(8, 10, 9, 0.86);
  border: 1px solid rgba(244, 241, 232, 0.16);
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.28);
}

.correction-target-bar {
  height: 38px;
  padding: 0 14px;
  color: rgba(244, 241, 232, 0.38);
  border-bottom: 1px solid rgba(244, 241, 232, 0.12);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.6rem;
  letter-spacing: 0.04em;
}

.correction-target p {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin: 0;
  padding: 34px 28px;
  color: rgba(244, 241, 232, 0.8);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: clamp(0.9rem, 1.65vw, 1.24rem);
  line-height: 1.65;
}

.correction-target p > b {
  color: var(--orange);
}

.correction-target mark,
.correction-target ins {
  color: inherit;
  background: rgba(255, 86, 51, 0.16);
  text-decoration: none;
  box-shadow: inset 0 -1px var(--orange);
}

.correction-target mark {
  color: rgba(244, 241, 232, 0.48);
  text-decoration: line-through;
  text-decoration-color: var(--orange);
}

.correction-line-state,
.correction-float-state {
  display: none;
}

.correction-line-animation {
  display: none;
  white-space: pre-wrap;
}

.correction-demo[data-state="insert"] .correction-line-state[data-demo-state~="insert"],
.correction-demo[data-state="edit"] .correction-line-state[data-demo-state~="edit"],
.correction-demo[data-state="replace"] .correction-line-state[data-demo-state~="replace"] {
  display: inline;
  animation: correctionStateIn 180ms ease-out both;
}

.correction-demo.is-text-animating .correction-line-state[data-demo-state] {
  display: none;
  animation: none;
}

.correction-demo.is-text-animating .correction-line-animation {
  display: inline;
}

.correction-cursor {
  width: 0.55em;
  height: 1.1em;
  background: rgba(244, 241, 232, 0.56);
  animation: cursorBlink 900ms steps(2, end) infinite;
}

.correction-demo[data-text-motion="delete"] .correction-cursor {
  background: var(--orange);
  animation-duration: 460ms;
}

.correction-float {
  position: absolute;
  z-index: 3;
  right: 12%;
  bottom: 118px;
  left: 12%;
  display: grid;
  grid-template-columns: 1fr 28px;
  gap: 12px;
  align-items: center;
  min-height: 92px;
  padding: 14px 10px 14px 18px;
  color: var(--ink);
  background: rgba(255, 253, 246, 0.96);
  border: 1px solid rgba(255, 255, 255, 0.78);
  border-radius: 15px;
  box-shadow: 0 30px 90px rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(24px);
  transition:
    right 240ms ease,
    left 240ms ease,
    min-height 240ms ease,
    opacity 160ms ease,
    transform 160ms ease;
}

.correction-demo.is-text-animating .correction-float {
  opacity: 0;
  transform: translateY(4px) scale(0.98);
}

.correction-float-state p {
  margin: 0;
  font-size: clamp(0.92rem, 1.6vw, 1.15rem);
  line-height: 1.55;
}

.correction-float-state strong {
  color: var(--orange);
  box-shadow: inset 0 -1px var(--orange);
}

.correction-demo[data-state="insert"] .correction-float-state[data-demo-state~="insert"],
.correction-demo[data-state="edit"] .correction-float-state[data-demo-state~="edit"],
.correction-demo[data-state="replace"] .correction-float-state[data-demo-state~="replace"] {
  display: block;
  animation: correctionStateIn 180ms ease-out both;
}

.correction-demo[data-state="replace"] .correction-float {
  right: 35%;
  left: 35%;
  min-height: 66px;
}

.correction-demo[data-state="replace"] .correction-float-state p {
  color: var(--ink-soft);
  font-weight: 780;
  text-align: center;
}

.correction-steps {
  position: absolute;
  z-index: 4;
  right: 0;
  bottom: 0;
  left: 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid rgba(244, 241, 232, 0.16);
}

.correction-steps button {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 12px;
  align-items: center;
  min-height: 66px;
  padding: 0 20px;
  color: rgba(244, 241, 232, 0.5);
  background: rgba(5, 5, 5, 0.86);
  border: 0;
  border-right: 1px solid rgba(244, 241, 232, 0.14);
  font: inherit;
  text-align: left;
  cursor: pointer;
  transition: color 160ms ease, background 160ms ease;
}

.correction-steps button:last-child {
  border-right: 0;
}

.correction-steps button:hover,
.correction-steps button:focus-visible,
.correction-steps button[aria-pressed="true"] {
  color: var(--paper-light);
  background: rgba(255, 86, 51, 0.12);
}

.correction-steps button:focus-visible {
  outline: 2px solid var(--orange);
  outline-offset: -3px;
}

.correction-steps button > span {
  color: var(--orange);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.64rem;
}

.correction-steps strong {
  font-size: 0.9rem;
}

@keyframes signalFlicker {
  0% { opacity: 0.3; transform: scaleY(0.68); }
  55% { opacity: 0.92; transform: scaleY(1); }
  100% { opacity: 0.5; transform: scaleY(0.82); }
}

@keyframes correctionStateIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes cursorBlink {
  50% { opacity: 0; }
}

.architecture-section {
  position: relative;
  isolation: isolate;
  padding: 104px 0 92px;
  overflow: hidden;
  color: var(--paper-light);
  background: var(--black);
  border-top: 1px solid var(--black);
}

.architecture-section::before {
  position: absolute;
  inset: 0;
  z-index: -2;
  content: "";
  background:
    linear-gradient(rgba(244, 241, 232, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(244, 241, 232, 0.045) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: linear-gradient(180deg, #000 0%, rgba(0, 0, 0, 0.5) 56%, transparent 100%);
}

.architecture-section::after {
  position: absolute;
  z-index: -1;
  top: 18%;
  right: -20rem;
  width: 50rem;
  height: 50rem;
  content: "";
  background: radial-gradient(circle, rgba(255, 86, 51, 0.12), transparent 66%);
  pointer-events: none;
}

.architecture-inner {
  width: min(var(--max), calc(100% - 64px));
  margin: 0 auto;
}

.architecture-intro {
  display: grid;
  grid-template-columns: 240px minmax(0, 1fr);
  gap: 48px;
  align-items: start;
}

.architecture-intro .eyebrow {
  color: var(--orange);
}

.architecture-intro h2 {
  max-width: 900px;
}

.architecture-console {
  margin-top: 62px;
}

.architecture-path-shell {
  overflow-x: auto;
  scrollbar-color: rgba(244, 241, 232, 0.28) transparent;
  scrollbar-width: thin;
}

.architecture-path-shell:focus-visible {
  outline: 1px solid rgba(255, 86, 51, 0.82);
  outline-offset: 6px;
}

.architecture-path {
  position: relative;
  display: grid;
  grid-template-columns: repeat(7, minmax(108px, 1fr));
  min-width: 800px;
  margin: 0;
  padding: 20px 0 30px;
  list-style: none;
  --architecture-progress: 0%;
}

.architecture-rail {
  position: absolute;
  top: 78px;
  right: calc(100% / 14);
  left: calc(100% / 14);
  z-index: 0;
  display: block;
  height: 1px;
  background: rgba(244, 241, 232, 0.2);
}

.architecture-rail::before {
  position: absolute;
  top: -2px;
  right: 0;
  left: 0;
  height: 5px;
  content: "";
  background: repeating-linear-gradient(90deg, transparent 0 23px, rgba(244, 241, 232, 0.13) 23px 24px);
}

.architecture-rail-progress {
  position: absolute;
  top: 0;
  left: 0;
  width: var(--architecture-progress);
  height: 1px;
  background: var(--orange);
  box-shadow: 0 0 12px rgba(255, 86, 51, 0.5);
  transition: width 280ms cubic-bezier(0.22, 1, 0.36, 1);
}

.architecture-rail-progress::after {
  position: absolute;
  top: -3px;
  right: -3px;
  width: 7px;
  height: 7px;
  content: "";
  background: var(--orange);
  border-radius: 1px;
  box-shadow: 0 0 0 3px rgba(255, 86, 51, 0.12), 0 0 18px rgba(255, 86, 51, 0.82);
  animation: architectureSignalPulse 1.8s ease-in-out infinite;
}

.architecture-node {
  position: relative;
  z-index: 1;
  min-width: 0;
}

.architecture-node button {
  display: grid;
  grid-template-rows: 18px 58px auto;
  gap: 11px;
  justify-items: center;
  width: 100%;
  min-height: 133px;
  padding: 0 8px;
  color: rgba(244, 241, 232, 0.46);
  font: inherit;
  text-align: center;
  background: transparent;
  border: 0;
  cursor: pointer;
  transition: color 170ms ease, transform 170ms ease;
}

.architecture-node button:hover,
.architecture-node button:focus-visible,
.architecture-node.is-active button {
  color: var(--orange);
  transform: translateY(-2px);
}

.architecture-node button:focus-visible {
  outline: none;
}

.architecture-node-code {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 0.66rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  transition: color 170ms ease;
}

.architecture-node.is-passed .architecture-node-code,
.architecture-node.is-active .architecture-node-code {
  color: var(--orange);
}

.architecture-glyph {
  position: relative;
  display: grid;
  place-items: center;
  width: 58px;
  height: 58px;
  color: inherit;
  background: var(--black);
  border: 1px solid rgba(244, 241, 232, 0.3);
  border-radius: 50%;
  box-shadow: 0 0 0 5px var(--black);
  transition: border-color 170ms ease, box-shadow 170ms ease, background 170ms ease;
}

.architecture-glyph::before {
  position: absolute;
  inset: -8px;
  content: "";
  background: repeating-conic-gradient(currentColor 0deg 2deg, transparent 2deg 30deg);
  border-radius: 50%;
  opacity: 0.38;
  -webkit-mask: radial-gradient(farthest-side, transparent calc(100% - 2px), #000 0);
  mask: radial-gradient(farthest-side, transparent calc(100% - 2px), #000 0);
  transition: opacity 170ms ease, transform 260ms cubic-bezier(0.22, 1, 0.36, 1);
}

.architecture-node button:hover .architecture-glyph,
.architecture-node button:focus-visible .architecture-glyph,
.architecture-node.is-active .architecture-glyph {
  color: var(--orange);
  background: #0c0807;
  border-color: rgba(255, 86, 51, 0.84);
  box-shadow: 0 0 0 5px var(--black), inset 0 0 18px rgba(255, 86, 51, 0.1), 0 0 20px rgba(255, 86, 51, 0.14);
}

.architecture-node button:hover .architecture-glyph::before,
.architecture-node button:focus-visible .architecture-glyph::before,
.architecture-node.is-active .architecture-glyph::before {
  opacity: 0.92;
  transform: rotate(8deg);
}

.architecture-node button:focus-visible .architecture-glyph {
  box-shadow: 0 0 0 5px var(--black), 0 0 0 7px rgba(255, 86, 51, 0.9);
}

.architecture-glyph svg {
  width: 30px;
  height: 30px;
  overflow: visible;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.35;
  vector-effect: non-scaling-stroke;
}

.architecture-node-title {
  max-width: 112px;
  color: rgba(244, 241, 232, 0.72);
  font-size: 0.82rem;
  font-weight: 720;
  line-height: 1.2;
  transition: color 170ms ease;
}

.architecture-node button:hover .architecture-node-title,
.architecture-node button:focus-visible .architecture-node-title,
.architecture-node.is-active .architecture-node-title {
  color: var(--paper-light);
}

.architecture-inspector {
  min-height: 190px;
  border-top: 1px solid rgba(244, 241, 232, 0.22);
  border-bottom: 1px solid rgba(244, 241, 232, 0.22);
}

.architecture-detail {
  display: grid;
  grid-template-columns: 132px minmax(0, 1fr) minmax(180px, 0.45fr);
  gap: 38px;
  align-items: start;
  min-height: 188px;
  padding: 34px 0 30px;
  animation: architectureDetailIn 240ms cubic-bezier(0.22, 1, 0.36, 1) both;
}

.architecture-detail[hidden] {
  display: none;
}

.architecture-detail-index,
.architecture-boundary-label {
  color: var(--orange);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.architecture-detail-index {
  margin: 5px 0 0;
}

.architecture-detail h3 {
  margin: 0 0 10px;
  color: var(--paper-light);
  font-size: clamp(1.7rem, 3vw, 2.35rem);
  line-height: 1;
}

.architecture-detail > div > p {
  max-width: 650px;
  margin: 0;
  color: rgba(244, 241, 232, 0.64);
  font-size: 1.02rem;
}

.architecture-boundary {
  display: grid;
  gap: 9px;
  min-height: 70px;
  margin: 2px 0 0;
  padding-left: 20px;
  color: rgba(244, 241, 232, 0.72);
  border-left: 1px solid rgba(244, 241, 232, 0.18);
  font-size: 0.86rem;
}

@keyframes architectureSignalPulse {
  0%,
  100% {
    opacity: 0.54;
    transform: scale(0.78) rotate(0deg);
  }

  50% {
    opacity: 1;
    transform: scale(1) rotate(45deg);
  }
}

@keyframes architectureDetailIn {
  from {
    opacity: 0;
    transform: translateY(7px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.scope-intro {
  margin-bottom: clamp(30px, 4vw, 40px);
}

.scope-section {
  padding-top: 72px;
}

.scope-intro .eyebrow {
  margin: 0;
}

.scope-table {
  border-top: 1px solid var(--line);
}

.scope-table div {
  display: grid;
  grid-template-columns: 140px minmax(260px, 0.8fr) 1fr;
  gap: 32px;
  padding: 25px 0;
  border-bottom: 1px solid var(--line);
}

.scope-table strong {
  color: var(--ink);
  font-size: 1.18rem;
}

.scope-table p {
  margin-bottom: 0;
  color: var(--muted);
}

.memory-section {
  display: grid;
  grid-template-columns: 1fr minmax(320px, 520px);
  gap: 72px;
  align-items: end;
  width: 100%;
  max-width: none;
  padding-right: max(32px, calc((100vw - var(--max)) / 2));
  padding-left: max(32px, calc((100vw - var(--max)) / 2));
  color: var(--paper-light);
  background:
    linear-gradient(90deg, rgba(5, 5, 5, 1), rgba(5, 5, 5, 0.92)),
    repeating-linear-gradient(0deg, rgba(244, 241, 232, 0.08) 0 1px, transparent 1px 42px);
  border-top: 0;
}

.memory-copy p:last-child {
  max-width: 760px;
  margin: 28px 0 0;
  color: rgba(244, 241, 232, 0.66);
  font-size: 1.22rem;
}

.memory-lines {
  display: grid;
  border-top: 1px solid rgba(244, 241, 232, 0.18);
}

.memory-lines > span {
  display: block;
  padding: 21px 0;
  color: rgba(244, 241, 232, 0.86);
  border-bottom: 1px solid rgba(244, 241, 232, 0.18);
}

.memory-lines > span:last-child {
  color: var(--orange);
}

.privacy-ledger {
  border-top: 1px solid var(--ink);
}

.privacy-ledger > div {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 32px;
  align-items: start;
  padding: 28px 0;
  border-bottom: 1px solid var(--line);
}

.privacy-ledger span {
  color: var(--orange);
  font-size: 0.76rem;
  font-weight: 400;
  text-transform: uppercase;
}

.privacy-section .eyebrow,
.privacy-section h2 {
  font-weight: 400;
}

.privacy-ledger p {
  max-width: 850px;
  margin: 0;
  font-size: clamp(1.25rem, 2.2vw, 2rem);
  font-weight: 400;
  line-height: 1.18;
}

.privacy-ledger p .lang {
  color: inherit;
  font-size: inherit;
  font-weight: inherit;
  text-transform: none;
}

.privacy-more {
  margin: 28px 0 0 auto;
  font-weight: 400;
  text-align: right;
}

.privacy-more a:hover,
.privacy-more a:focus-visible {
  color: var(--orange);
}

.download-section {
  display: grid;
  grid-template-columns: 1fr minmax(340px, 520px);
  gap: 72px;
  align-items: end;
}

.download-copy p:last-child {
  max-width: 690px;
  margin: 24px 0 0;
  color: var(--muted);
  font-size: 1.14rem;
}

.download-list {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--ink);
}

.download-list a {
  display: grid;
  grid-template-columns: 92px 1fr;
  gap: 24px;
  align-items: center;
  min-height: 76px;
  border-bottom: 1px solid var(--ink);
  transition: background 160ms ease, color 160ms ease, padding-left 160ms ease;
}

.download-list a:hover,
.download-list a:focus-visible {
  padding-left: 14px;
  color: var(--paper-light);
  background: var(--ink);
}

.download-list a:hover span,
.download-list a:focus-visible span {
  color: var(--orange);
}

.download-list strong {
  font-size: 1.08rem;
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 24px;
  padding: 30px 32px 38px;
  color: var(--muted);
  border-top: 1px solid var(--line);
}

.site-footer p {
  max-width: 760px;
  margin: 0;
}

.site-footer div {
  display: flex;
  gap: 18px;
}

.site-footer a {
  color: var(--ink);
  font-weight: 850;
}

.footer-credit {
  flex-basis: 100%;
  margin-top: -8px;
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 450;
  letter-spacing: 0.04em;
  opacity: 0.62;
  text-align: center;
}

.document-page {
  min-height: 100svh;
  padding: 124px 32px 90px;
}

.document-shell {
  display: grid;
  grid-template-columns: minmax(180px, 260px) minmax(0, 760px);
  gap: clamp(40px, 8vw, 120px);
  width: min(var(--max), 100%);
  margin: 0 auto;
}

.document-aside {
  position: sticky;
  top: 112px;
  align-self: start;
}

.document-aside h1 {
  margin: 0 0 16px;
  font-size: clamp(3rem, 7vw, 6rem);
  line-height: 0.92;
}

.document-aside p {
  color: var(--muted);
}

.document-aside a,
.document-content a {
  font-weight: 850;
  text-decoration: underline;
  text-decoration-color: var(--orange);
  text-underline-offset: 4px;
}

.release-version-index {
  display: grid;
  gap: 8px;
  margin: 24px 0;
}

.release-version-index a {
  width: fit-content;
}

.document-content {
  border-top: 1px solid var(--ink);
}

.document-block {
  padding: 34px 0;
  border-bottom: 1px solid var(--line);
}

.document-block h2 {
  margin-bottom: 18px;
  font-size: clamp(1.7rem, 3.4vw, 2.8rem);
  line-height: 1.04;
}

.document-block h3 {
  margin: 26px 0 10px;
  font-size: 1.1rem;
  line-height: 1.25;
}

.document-block p,
.document-block li {
  color: var(--ink-soft);
}

.document-block ul {
  display: grid;
  gap: 8px;
  padding-left: 1.2rem;
}

.document-meta {
  color: var(--orange) !important;
  font-size: 0.78rem;
  font-weight: 860;
  text-transform: uppercase;
}

.reveal {
  opacity: 1;
  transform: none;
}

.js .reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 560ms ease, transform 560ms ease;
}

.js .reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition: none !important;
    animation: none !important;
  }

  .js .reveal {
    opacity: 1;
    transform: none;
  }
}

@media (max-width: 980px) {
  .site-header {
    padding: 0 20px;
  }

  .site-nav {
    gap: 14px;
    font-size: 0.84rem;
  }

  .hero {
    padding: 100px 24px 72px;
  }

  .hero-title {
    gap: 14px;
  }

  .hero-statement {
    max-width: 760px;
    margin-top: 50px;
  }

  .hero-utterance {
    grid-template-columns: 130px minmax(0, 1fr);
    gap: 18px 24px;
  }

  .hero-utterance-meta {
    grid-column: 2;
  }

  .hero-workbench {
    right: -230px;
    width: 560px;
    opacity: 0.28;
  }

  .hero-strip {
    width: calc(100% - 48px);
    grid-template-columns: repeat(2, 1fr);
  }

  .manifesto-section,
  .correction-section,
  .scope-section,
  .privacy-section,
  .download-section {
    width: min(100% - 40px, 760px);
  }

  .architecture-inner {
    width: min(100% - 40px, 860px);
  }

  .section-intro,
  .correction-copy,
  .architecture-intro,
  .memory-section,
  .download-section {
    grid-template-columns: 1fr;
    gap: 34px;
  }

  .architecture-detail {
    grid-template-columns: 100px minmax(0, 1fr);
    gap: 26px;
  }

  .architecture-boundary {
    grid-column: 2;
  }

  .scope-table div {
    grid-template-columns: 110px 1fr;
  }

  .scope-table p {
    grid-column: 2;
  }

  .document-shell {
    grid-template-columns: 1fr;
  }

  .document-aside {
    position: static;
  }
}

@media (max-width: 720px) {
  .site-nav {
    display: none;
  }
}

@media (max-width: 640px) {
  .site-header {
    height: 58px;
    gap: 12px;
    padding: 0 16px;
  }

  .brand b {
    display: none;
  }

  .brand {
    flex: 0 0 auto;
  }

  .header-actions {
    gap: 8px;
    flex: 0 0 auto;
    margin-left: auto;
    min-width: 0;
  }

  .site-nav {
    display: none;
  }

  .header-download {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 30px;
    padding: 0 11px;
    color: var(--black);
    background: var(--orange);
    border-radius: 7px;
    font-size: 0.74rem;
    font-weight: 850;
  }

  .language-toggle {
    flex: 0 0 auto;
    position: relative;
    top: auto;
    left: auto;
    width: 90px;
    min-height: 30px;
  }

  .toggle-label {
    min-height: 24px;
    font-size: 0.72rem;
  }

  .hero {
    min-height: 90svh;
    padding: 92px 20px 34px;
  }

  .hero-copy {
    width: 100%;
  }

  .hero-title {
    display: flex;
    gap: 0.08em;
    font-size: clamp(5.6rem, 28vw, 7.2rem);
    line-height: 0.72;
  }

  .hero-title small {
    font-size: 0.31em;
  }

  .hero .eyebrow {
    margin-bottom: 22px;
  }

  .hero-statement {
    margin: 42px 0 18px;
    font-size: clamp(2.15rem, 10.5vw, 3rem);
    line-height: 1.04;
  }

  .hero-statement em {
    display: block;
  }

  .hero-note {
    margin: 0 0 24px;
    font-size: 0.94rem;
  }

  .hero-actions {
    flex-direction: column;
    justify-content: flex-start;
    width: min(330px, 100%);
    margin-left: 0;
  }

  .button {
    width: 100%;
  }

  .hero-workbench {
    display: none;
  }

  .hero-strip {
    grid-template-columns: 1fr 1fr;
    width: calc(100% - 40px);
    margin-top: 34px;
  }

  .hero-utterance {
    grid-template-columns: 1fr;
    gap: 12px;
    margin-top: 48px;
    padding-top: 20px;
  }

  .hero-utterance blockquote {
    font-size: 1.12rem;
  }

  .hero-utterance-meta {
    grid-column: auto;
    white-space: normal;
  }

  .hero-strip span,
  .hero-strip strong {
    min-height: 50px;
    padding-top: 12px;
    font-size: 0.78rem;
  }

  .manifesto-section,
  .correction-section,
  .scope-section,
  .privacy-section,
  .download-section {
    width: calc(100% - 32px);
  }

  .manifesto-section,
  .correction-section,
  .scope-section,
  .memory-section,
  .privacy-section,
  .download-section {
    padding-top: 66px;
    padding-bottom: 66px;
  }

  .scope-section {
    padding-top: 48px;
  }

  .correction-copy {
    margin-bottom: 30px;
  }

  .correction-demo {
    min-height: 520px;
  }

  .correction-target {
    top: 72px;
    right: 14px;
    left: 14px;
    min-height: 190px;
  }

  .correction-target-bar {
    padding: 0 11px;
  }

  .correction-target p {
    gap: 7px;
    padding: 26px 14px;
    font-size: 0.76rem;
    line-height: 1.7;
  }

  .correction-float {
    right: 20px;
    bottom: 112px;
    left: 20px;
    padding-left: 14px;
  }

  .correction-float-state p {
    font-size: 0.84rem;
  }

  .correction-demo[data-state="replace"] .correction-float {
    right: 22%;
    left: 22%;
  }

  .correction-steps button {
    grid-template-columns: 1fr;
    gap: 2px;
    min-height: 64px;
    padding: 9px 12px;
  }

  .correction-steps strong {
    font-size: 0.78rem;
  }

  .architecture-section {
    padding-top: 70px;
    padding-bottom: 66px;
  }

  .architecture-inner {
    width: calc(100% - 32px);
  }

  .architecture-intro {
    gap: 26px;
  }

  .architecture-intro h2 {
    font-size: clamp(2.2rem, 11vw, 3.2rem);
  }

  .architecture-intro > div:last-child > p {
    margin-top: 20px;
    font-size: 1rem;
  }

  .architecture-console {
    margin-top: 44px;
  }

  .architecture-path {
    grid-template-columns: repeat(7, 110px);
    min-width: 770px;
  }

  .architecture-inspector {
    min-height: 278px;
  }

  .architecture-detail {
    grid-template-columns: 1fr;
    gap: 12px;
    min-height: 276px;
    padding: 26px 0 24px;
  }

  .architecture-detail-index {
    margin: 0;
  }

  .architecture-detail h3 {
    font-size: 1.75rem;
  }

  .architecture-boundary {
    grid-column: auto;
    gap: 6px;
    min-height: 0;
    margin-top: 6px;
    padding: 15px 0 0;
    border-top: 1px solid rgba(244, 241, 232, 0.18);
    border-left: 0;
  }

  .section-intro {
    margin-bottom: 36px;
  }

  .scope-table div,
  .download-list a {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .scope-table p {
    grid-column: auto;
  }

  .memory-section {
    padding-right: 16px;
    padding-left: 16px;
  }

  .privacy-ledger > div {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .privacy-more {
    text-align: left;
  }

  .document-page {
    padding: 92px 16px 64px;
  }

  .site-footer {
    align-items: flex-start;
    flex-direction: column;
    padding: 26px 16px 32px;
  }

  .site-footer div {
    flex-direction: column;
    gap: 8px;
  }
}

/* --------------------------------------------------------------------------
   Theme and localization controls
   -------------------------------------------------------------------------- */

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

.language-select {
  position: relative;
  display: inline-flex;
  align-items: center;
}

/* Keep the two utility controls visually grouped without letting longer
   translated navigation labels crowd the header. */
.header-actions {
  gap: 10px;
}

.site-nav {
  margin-right: 10px;
}

.language-select select,
[data-language-select] {
  color-scheme: light;
  min-width: 64px;
  height: 34px;
  padding: 0 8px;
  color: var(--chrome-text);
  background: var(--chrome-control);
  border: 1px solid var(--chrome-line);
  border-radius: 8px;
  font: 560 0.76rem/1 Inter, ui-sans-serif, system-ui, -apple-system, sans-serif;
  cursor: pointer;
  transition: background-color 160ms ease, border-color 160ms ease, color 160ms ease;
}

.language-select select option,
[data-language-select] option {
  color: #171713;
  background-color: #fffdf6;
}

.language-select select:hover,
.language-select select:focus-visible,
[data-language-select]:hover,
[data-language-select]:focus-visible {
  background: var(--chrome-control-hover);
  border-color: color-mix(in srgb, var(--chrome-text) 32%, transparent);
  outline: none;
}

.theme-toggle,
[data-theme-toggle] {
  display: inline-grid;
  flex: 0 0 auto;
  width: 34px;
  height: 34px;
  padding: 0;
  place-items: center;
  color: var(--chrome-text);
  background: var(--chrome-control);
  border: 1px solid var(--chrome-line);
  border-radius: 50%;
  font: 540 0.92rem/1 Inter, ui-sans-serif, system-ui, -apple-system, sans-serif;
  cursor: pointer;
  transition: color 160ms ease, background-color 160ms ease, border-color 160ms ease,
    transform 180ms cubic-bezier(0.22, 1, 0.36, 1);
}

.theme-toggle:hover,
.theme-toggle:focus-visible,
[data-theme-toggle]:hover,
[data-theme-toggle]:focus-visible {
  color: var(--orange);
  background: var(--chrome-control-hover);
  border-color: color-mix(in srgb, var(--orange) 52%, var(--chrome-line));
  outline: none;
  transform: rotate(8deg);
}

[data-theme-icon][hidden] {
  display: none !important;
}

[data-language-options] {
  display: inline-flex;
  gap: 2px;
  padding: 2px;
  background: var(--chrome-control);
  border: 1px solid var(--chrome-line);
  border-radius: 9px;
}

[data-language-option] {
  min-width: 32px;
  height: 28px;
  padding: 0 7px;
  color: var(--chrome-muted);
  background: transparent;
  border: 0;
  border-radius: 6px;
  font: 550 0.72rem/1 Inter, ui-sans-serif, system-ui, -apple-system, sans-serif;
  cursor: pointer;
}

[data-language-option]:hover,
[data-language-option]:focus-visible,
[data-language-option][aria-pressed="true"] {
  color: var(--chrome-text);
  background: var(--chrome-control-hover);
  outline: none;
}

/* One quiet proof line: this supports the hero claim without becoming a card
   strip or competing with the primary actions. */
.hero-proof {
  position: relative;
  max-width: 590px;
  margin: -12px 0 24px auto;
  padding-left: 16px;
  color: var(--ink-soft);
  font-size: 0.78rem;
  font-weight: 430;
  line-height: 1.5;
}

.hero-proof::before {
  position: absolute;
  top: 0.38em;
  bottom: 0.38em;
  left: 0;
  width: 2px;
  content: "";
  background: var(--orange);
  opacity: 0.76;
}

/* Concrete transformations, shown as two editorial rows rather than a card
   grid. The first proves local post-processing; the second shows the fuller
   Cloud AI edit loop without obscuring that boundary. */
.voice-cases {
  margin-top: 82px;
  padding-top: 36px;
  border-top: 1px solid var(--section-rule);
}

.voice-cases-intro {
  margin-bottom: 36px;
}

.voice-cases-intro .eyebrow {
  margin: 0;
}

.voice-case-list {
  border-top: 1px solid var(--section-rule);
}

.voice-case {
  position: relative;
  padding: 24px 0 34px;
  border-bottom: 1px solid var(--section-rule);
}

.voice-case::before {
  position: absolute;
  top: -1px;
  left: 0;
  width: 0;
  height: 2px;
  content: "";
  background: var(--orange);
  transition: width 320ms cubic-bezier(0.22, 1, 0.36, 1);
}

.voice-case:hover::before,
.voice-case:focus-within::before {
  width: 92px;
}

.voice-case-header {
  display: grid;
  grid-template-columns: 156px minmax(0, 1fr) auto;
  gap: 24px;
  align-items: baseline;
}

.voice-case-code,
.voice-case-mode,
.voice-case-step > span {
  color: var(--muted);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.voice-case-header strong {
  font-size: 1.03rem;
  font-weight: 620;
}

.voice-case-mode {
  color: var(--accent-text);
  white-space: nowrap;
}

.voice-case-flow {
  display: grid;
  align-items: stretch;
  margin-top: 26px;
}

.voice-case-flow-two {
  grid-template-columns: minmax(0, 1fr) 50px minmax(0, 1fr);
}

.voice-case-flow-three {
  grid-template-columns: minmax(0, 0.9fr) 32px minmax(0, 1.18fr) 32px minmax(0, 0.9fr);
}

.voice-case-step {
  min-width: 0;
  padding: 20px 0 4px;
  border-top: 1px solid var(--line);
}

.voice-case-step > span {
  display: block;
  margin-bottom: 13px;
}

.voice-case-step p {
  margin: 0;
  color: var(--ink-soft);
  font-size: clamp(1.15rem, 2.05vw, 1.68rem);
  font-weight: 390;
  letter-spacing: -0.025em;
  line-height: 1.28;
  overflow-wrap: anywhere;
}

.voice-case-command p {
  color: var(--muted);
  font-size: clamp(1rem, 1.6vw, 1.3rem);
  font-weight: 360;
}

.voice-case-arrow {
  align-self: center;
  justify-self: center;
  color: var(--muted);
  font-size: 1.12rem;
  transition: color 180ms ease, transform 220ms cubic-bezier(0.22, 1, 0.36, 1);
}

.voice-case:hover .voice-case-arrow {
  color: var(--accent-text);
  transform: translateX(4px);
}

.voice-case mark,
.voice-case ins {
  color: inherit;
  background: transparent;
  text-decoration: none;
}

.voice-case mark {
  color: var(--muted);
  box-shadow: inset 0 -1px color-mix(in srgb, var(--orange) 62%, transparent);
}

.voice-case ins {
  color: var(--accent-text);
  box-shadow: inset 0 -0.22em color-mix(in srgb, var(--orange) 13%, transparent);
  transition: background 180ms ease, box-shadow 180ms ease;
}

.voice-case:hover ins {
  box-shadow: inset 0 -0.48em color-mix(in srgb, var(--orange) 18%, transparent);
}

.voice-case .lang {
  color: inherit;
  font-size: inherit;
  font-weight: inherit;
  letter-spacing: inherit;
  line-height: inherit;
  text-transform: none;
}

/* Explicit dark preference. The no-script system-dark rule below uses the
   same material values, while an explicit light preference keeps :root. */
html[data-theme="dark"] {
  color-scheme: dark;
  --black: #050605;
  --ink: #f0ede4;
  --ink-soft: #c8c3b8;
  --muted: #96938a;
  --paper: #090a09;
  --paper-light: #121410;
  --line: #30322d;
  --accent-text: #ff6b4d;
  --shadow: 0 30px 100px rgba(0, 0, 0, 0.56);
  --chrome-bg: rgba(8, 9, 8, 0.86);
  --chrome-text: #f0ede4;
  --chrome-muted: rgba(240, 237, 228, 0.62);
  --chrome-line: rgba(240, 237, 228, 0.14);
  --chrome-control: rgba(240, 237, 228, 0.055);
  --chrome-control-hover: rgba(240, 237, 228, 0.1);
  --section-rule: #55584f;
  --tech-bg: #050605;
  --tech-surface: #0b0d0b;
  --tech-surface-strong: #11130f;
  --tech-text: #f1ede3;
  --tech-soft: rgba(241, 237, 227, 0.66);
  --tech-muted: rgba(241, 237, 227, 0.42);
  --tech-line: rgba(241, 237, 227, 0.14);
  --tech-line-strong: rgba(241, 237, 227, 0.25);
  --tech-grid: rgba(241, 237, 227, 0.04);
  --tech-shadow: 0 34px 96px rgba(0, 0, 0, 0.46);
  --float-bg: rgba(18, 20, 16, 0.96);
  --float-text: #f1ede3;
  --float-soft: rgba(241, 237, 227, 0.58);
  --float-line: rgba(241, 237, 227, 0.16);
  --float-shadow: 0 28px 76px rgba(0, 0, 0, 0.52);
}

html[data-theme="dark"] .language-select select,
html[data-theme="dark"] [data-language-select] {
  color-scheme: dark;
}

html[data-theme="dark"] .language-select select option,
html[data-theme="dark"] [data-language-select] option {
  color: #f0ede4;
  background-color: #121410;
}

@media (prefers-color-scheme: dark) {
  html:not([data-theme]) {
    color-scheme: dark;
    --black: #050605;
    --ink: #f0ede4;
    --ink-soft: #c8c3b8;
    --muted: #96938a;
    --paper: #090a09;
    --paper-light: #121410;
    --line: #30322d;
    --accent-text: #ff6b4d;
    --shadow: 0 30px 100px rgba(0, 0, 0, 0.56);
    --chrome-bg: rgba(8, 9, 8, 0.86);
    --chrome-text: #f0ede4;
    --chrome-muted: rgba(240, 237, 228, 0.62);
    --chrome-line: rgba(240, 237, 228, 0.14);
    --chrome-control: rgba(240, 237, 228, 0.055);
    --chrome-control-hover: rgba(240, 237, 228, 0.1);
    --section-rule: #55584f;
    --tech-bg: #050605;
    --tech-surface: #0b0d0b;
    --tech-surface-strong: #11130f;
    --tech-text: #f1ede3;
    --tech-soft: rgba(241, 237, 227, 0.66);
    --tech-muted: rgba(241, 237, 227, 0.42);
    --tech-line: rgba(241, 237, 227, 0.14);
    --tech-line-strong: rgba(241, 237, 227, 0.25);
    --tech-grid: rgba(241, 237, 227, 0.04);
    --tech-shadow: 0 34px 96px rgba(0, 0, 0, 0.46);
    --float-bg: rgba(18, 20, 16, 0.96);
    --float-text: #f1ede3;
    --float-soft: rgba(241, 237, 227, 0.58);
    --float-line: rgba(241, 237, 227, 0.16);
    --float-shadow: 0 28px 76px rgba(0, 0, 0, 0.52);
  }

  html:not([data-theme]) .language-select select,
  html:not([data-theme]) [data-language-select] {
    color-scheme: dark;
  }

  html:not([data-theme]) .language-select select option,
  html:not([data-theme]) [data-language-select] option {
    color: #f0ede4;
    background-color: #121410;
  }
}

body,
.hero,
.site-header,
.correction-demo,
.architecture-section,
.memory-section,
.hero-workbench,
.hero-floating-window,
.correction-target,
.correction-float {
  transition: color 180ms ease, background-color 180ms ease, border-color 180ms ease,
    box-shadow 180ms ease;
}

.site-header {
  color: var(--chrome-text);
  background: var(--chrome-bg);
  border-bottom-color: var(--chrome-line);
}

.site-nav {
  color: var(--chrome-muted);
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--chrome-text);
}

.language-toggle {
  color: var(--chrome-muted);
  background: var(--chrome-control);
  border-color: var(--chrome-line);
}

.language-toggle:hover,
.language-toggle:focus-visible {
  background: var(--chrome-control-hover);
  border-color: color-mix(in srgb, var(--chrome-text) 32%, transparent);
}

.toggle-thumb {
  background: var(--chrome-text);
}

body[data-language="zh-Hans"] .toggle-label-zh,
body[data-language="zh"] .toggle-label-zh,
body[data-language="en"] .toggle-label-en {
  color: var(--chrome-bg);
}

body[data-language="zh-Hans"] .toggle-label-en,
body[data-language="zh"] .toggle-label-en,
body[data-language="en"] .toggle-label-zh,
body[data-language="zh-Hant"] .toggle-label,
body[data-language="ja"] .toggle-label {
  color: var(--chrome-muted);
}

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

.hero::before {
  background: var(--line);
}

.button.secondary,
.hero .button.secondary {
  color: var(--ink);
  border-color: color-mix(in srgb, var(--ink) 28%, transparent);
}

.button.secondary:hover,
.button.secondary:focus-visible,
.hero .button.secondary:hover,
.hero .button.secondary:focus-visible {
  border-color: var(--ink);
}

.hero-workbench {
  color: var(--tech-soft);
  background:
    linear-gradient(var(--tech-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--tech-grid) 1px, transparent 1px),
    var(--tech-bg);
  border-color: var(--tech-line-strong);
  box-shadow: var(--tech-shadow);
}

.hero-workbench-bar {
  color: var(--tech-muted);
  border-bottom-color: var(--tech-line);
}

.hero-workbench-bar i {
  background: var(--tech-line-strong);
}

.hero-terminal-line,
.hero-local-state {
  color: var(--tech-muted);
}

.hero-floating-window,
.correction-float {
  color: var(--float-text);
  background: var(--float-bg);
  border-color: var(--float-line);
  box-shadow: var(--float-shadow);
}

.hero-floating-actions span,
.correction-float-actions span {
  color: var(--float-soft);
  border-color: var(--float-line);
}

.hero-strip {
  border-top-color: var(--tech-line-strong);
}

.hero-strip span,
.hero-strip strong {
  color: var(--tech-soft);
  border-right-color: var(--tech-line);
}

.hero-utterance,
.correction-section,
.scope-section,
.privacy-section,
.download-section {
  border-color: var(--section-rule);
}

.correction-demo {
  color: var(--tech-text);
  background:
    linear-gradient(var(--tech-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--tech-grid) 1px, transparent 1px),
    var(--tech-bg);
  border-color: var(--section-rule);
}

.correction-demo-head,
.correction-target-bar {
  color: var(--tech-muted);
  border-color: var(--tech-line);
}

.correction-target {
  color: var(--tech-text);
  background: color-mix(in srgb, var(--tech-surface) 92%, transparent);
  border-color: var(--tech-line-strong);
  box-shadow: var(--tech-shadow);
}

.correction-target p {
  color: var(--tech-soft);
}

.correction-target mark {
  color: var(--tech-muted);
}

.correction-cursor {
  background: var(--tech-soft);
}

.correction-demo[data-state="replace"] .correction-float-state p {
  color: var(--float-soft);
}

.correction-steps {
  border-color: var(--tech-line-strong);
}

.correction-steps button {
  color: var(--tech-muted);
  background: color-mix(in srgb, var(--tech-bg) 92%, transparent);
  border-color: var(--tech-line);
}

.correction-steps button:hover,
.correction-steps button:focus-visible,
.correction-steps button[aria-pressed="true"] {
  color: var(--tech-text);
  background: color-mix(in srgb, var(--orange) 11%, var(--tech-surface));
}

.architecture-section {
  color: var(--tech-text);
  background: var(--tech-bg);
  border-top-color: var(--section-rule);
}

.architecture-section::before {
  background:
    linear-gradient(var(--tech-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--tech-grid) 1px, transparent 1px);
}

.architecture-detail > div > p {
  color: var(--tech-soft);
}

.architecture-path-shell {
  scrollbar-color: var(--tech-line-strong) transparent;
}

.architecture-rail {
  background: var(--tech-line-strong);
}

.architecture-rail::before {
  background: repeating-linear-gradient(
    90deg,
    transparent 0 23px,
    var(--tech-line) 23px 24px
  );
}

.architecture-node button {
  color: var(--tech-muted);
}

.architecture-glyph {
  background: var(--tech-bg);
  border-color: var(--tech-line-strong);
  box-shadow: 0 0 0 5px var(--tech-bg);
}

.architecture-node button:hover .architecture-glyph,
.architecture-node button:focus-visible .architecture-glyph,
.architecture-node.is-active .architecture-glyph {
  background: color-mix(in srgb, var(--orange) 8%, var(--tech-bg));
  box-shadow: 0 0 0 5px var(--tech-bg), inset 0 0 18px rgba(255, 86, 51, 0.1),
    0 0 20px rgba(255, 86, 51, 0.14);
}

.architecture-node button:focus-visible .architecture-glyph {
  box-shadow: 0 0 0 5px var(--tech-bg), 0 0 0 7px rgba(255, 86, 51, 0.9);
}

.architecture-node-title,
.architecture-boundary {
  color: var(--tech-soft);
}

.architecture-node button:hover .architecture-node-title,
.architecture-node button:focus-visible .architecture-node-title,
.architecture-node.is-active .architecture-node-title,
.architecture-detail h3 {
  color: var(--tech-text);
}

.architecture-inspector {
  border-color: var(--tech-line-strong);
}

.architecture-boundary {
  border-color: var(--tech-line);
}

.memory-section {
  color: var(--tech-text);
  background:
    linear-gradient(90deg, color-mix(in srgb, var(--tech-bg) 96%, transparent), var(--tech-bg)),
    repeating-linear-gradient(0deg, var(--tech-grid) 0 1px, transparent 1px 42px);
}

.memory-copy p:last-child,
.memory-lines > span {
  color: var(--tech-soft);
}

.memory-lines,
.memory-lines > span {
  border-color: var(--tech-line-strong);
}

.privacy-ledger,
.download-list,
.download-list a,
.document-content {
  border-color: var(--section-rule);
}

.download-list a:hover,
.download-list a:focus-visible {
  color: var(--paper);
  background: var(--ink);
}

.site-footer {
  color: var(--muted);
  border-color: var(--line);
}

/* The signal orange remains available for fills and motion. Small text uses a
   darker light-theme ink so labels remain readable on the paper surface. */
.brand b,
.eyebrow,
.hero-title small,
.hero-statement em,
.hero-terminal-line b,
.hero-floating-window strong,
.hero-utterance blockquote strong,
.scope-table span,
.download-list span,
.correction-target p > b,
.correction-float-state strong,
.correction-steps button > span,
.architecture-intro .eyebrow,
.architecture-node button:hover,
.architecture-node button:focus-visible,
.architecture-node.is-active button,
.architecture-node.is-passed .architecture-node-code,
.architecture-node.is-active .architecture-node-code,
.architecture-node button:hover .architecture-glyph,
.architecture-node button:focus-visible .architecture-glyph,
.architecture-node.is-active .architecture-glyph,
.architecture-detail-index,
.architecture-boundary-label,
.memory-lines > span:last-child,
.privacy-ledger span,
.privacy-more a:hover,
.privacy-more a:focus-visible,
.download-list a:hover span,
.download-list a:focus-visible span,
.theme-toggle:hover,
.theme-toggle:focus-visible,
[data-theme-toggle]:hover,
[data-theme-toggle]:focus-visible {
  color: var(--accent-text);
}

.document-meta {
  color: var(--accent-text) !important;
}

@media (max-width: 980px) {
  .voice-case-header {
    grid-template-columns: 120px minmax(0, 1fr) auto;
  }

  .voice-case-flow-three {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .voice-case-flow-three .voice-case-arrow {
    transform: rotate(90deg);
  }

  .voice-case-flow-three:hover .voice-case-arrow {
    transform: rotate(90deg) translateX(3px);
  }

}

@media (max-width: 640px) {
  .site-header {
    gap: 8px;
  }

  .brand {
    min-width: 0;
  }

  .brand .lang {
    white-space: nowrap;
  }

  /* The hero already carries the download action. At phone widths, keeping
     language and appearance reachable is more useful than duplicating it in
     the fixed header. */
  .header-download {
    display: none;
  }

  .header-actions {
    flex: 1 1 auto;
    justify-content: flex-end;
    gap: 6px;
  }

  .brand b {
    display: inline;
  }

  .language-select select,
  [data-language-select] {
    min-width: 58px;
    height: 30px;
    padding: 0 5px;
    font-size: 0.7rem;
  }

  .theme-toggle,
  [data-theme-toggle] {
    width: 30px;
    height: 30px;
  }

  .hero-proof {
    margin: -6px 0 22px;
    font-size: 0.74rem;
  }

  .voice-cases {
    margin-top: 54px;
    padding-top: 28px;
  }

  .voice-cases-intro {
    margin-bottom: 30px;
  }

  .voice-case {
    padding: 20px 0 28px;
  }

  .voice-case-header {
    grid-template-columns: 1fr auto;
    gap: 7px 14px;
  }

  .voice-case-code {
    grid-column: 1 / -1;
  }

  .voice-case-mode {
    grid-column: 1 / -1;
    justify-self: start;
    margin-top: 2px;
  }

  .voice-case-flow-two {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .voice-case-flow-two .voice-case-arrow {
    transform: rotate(90deg);
  }

  .voice-case-flow-two:hover .voice-case-arrow {
    transform: rotate(90deg) translateX(3px);
  }

  .voice-case-step {
    padding-top: 16px;
  }

  .voice-case-step p {
    font-size: 1.18rem;
  }

  .voice-case-command p {
    font-size: 1rem;
  }

}