:root {
  --color-bg: #061A36;
  --color-bg-deep: #04152D;
  --color-panel: #0D2B55;
  --color-panel-soft: #123963;
  --color-panel-light: #F4FAFF;
  --color-border: #315D86;
  --color-border-soft: rgba(102, 164, 213, 0.28);
  --color-accent: #33B5FF;
  --color-accent-dark: #0879BC;
  --color-accent-soft: rgba(51, 181, 255, 0.14);
  --color-accent-glow: rgba(51, 181, 255, 0.32);
  --color-text: #F7FBFF;
  --color-text-muted: #A9C4DC;
  --color-text-dark: #0A2747;
  --color-text-dark-muted: #53718D;
  --color-success: #22D6C5;
  --color-success-soft: rgba(34, 214, 197, 0.16);
  --color-warn: #F4BE5C;
  --color-warn-soft: rgba(244, 190, 92, 0.16);
  --color-error: #FF6B75;
  --color-error-soft: rgba(255, 107, 117, 0.14);
  --color-white-soft: rgba(247, 251, 255, 0.08);
  --color-white-medium: rgba(247, 251, 255, 0.14);
  --color-white-strong: rgba(247, 251, 255, 0.72);
  --color-shadow: rgba(0, 8, 24, 0.42);
  --color-shadow-soft: rgba(0, 14, 38, 0.24);
  --color-overlay: rgba(4, 21, 45, 0.78);
  --color-transparent: transparent;
  --font-display: Inter, "Noto Sans SC", "Noto Sans JP", "Noto Sans KR", system-ui, sans-serif;
  --font-body: Inter, "Noto Sans SC", "Noto Sans JP", "Noto Sans KR", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Consolas, monospace;
  --radius-pill: 999px;
  --radius-small: 10px;
  --radius-medium: 16px;
  --radius-large: 24px;
  --radius-window: 30px;
  --shadow-window: 0 34px 80px var(--color-shadow), 0 12px 28px var(--color-shadow-soft);
  --shadow-button: 0 12px 30px var(--color-accent-glow);
  --shadow-bubble: 0 12px 26px var(--color-shadow-soft);
  --shadow-panel: 0 24px 58px var(--color-shadow-soft);
  --page-width: 1344px;
  --content-width: 1120px;
  --reading-width: 780px;
  --header-height: 88px;
  --gutter: clamp(16px, 4vw, 32px);
  --section-space: clamp(72px, 9vw, 128px);
  --toc-offset: 104px;
  --transition-fast: 180ms ease;
  --transition-smooth: 420ms cubic-bezier(0.2, 0.75, 0.25, 1);
}

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

html {
  min-width: 0;
  scroll-behavior: smooth;
  background: var(--color-bg);
}

html.nav-open {
  overflow: hidden;
}

body {
  min-width: 0;
  min-height: 100vh;
  margin: 0;
  overflow-x: clip;
  color: var(--color-text);
  background:
    radial-gradient(circle at 83% 20%, var(--color-accent-soft) 0, var(--color-transparent) 27%),
    linear-gradient(180deg, var(--color-bg) 0%, var(--color-bg-deep) 100%);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

main,
section,
article,
aside,
header,
footer,
nav,
div {
  min-width: 0;
}

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

img {
  height: auto;
}

button,
input,
select,
textarea {
  color: inherit;
  font: inherit;
}

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

button {
  cursor: pointer;
}

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

p,
ul,
ol,
blockquote,
pre,
table {
  margin-top: 0;
}

p {
  margin-bottom: 1.2em;
}

ul,
ol {
  padding-left: 1.35em;
}

li + li {
  margin-top: 0.45em;
}

h1,
h2,
h3,
h4 {
  margin-top: 0;
  color: var(--color-text);
  font-family: var(--font-display);
  line-height: 1.16;
  text-wrap: balance;
}

h1 {
  margin-bottom: 24px;
  font-size: clamp(52px, 5.2vw, 72px);
  font-weight: 820;
  letter-spacing: -0.052em;
}

h2 {
  margin-bottom: 20px;
  font-size: clamp(32px, 4vw, 48px);
  font-weight: 780;
  letter-spacing: -0.035em;
}

h3 {
  margin-bottom: 14px;
  font-size: clamp(22px, 2.5vw, 30px);
  font-weight: 730;
  letter-spacing: -0.02em;
}

h4 {
  margin-bottom: 10px;
  font-size: 18px;
  font-weight: 700;
}

code,
kbd,
pre {
  font-family: var(--font-mono);
}

code {
  max-width: 100%;
  padding: 0.12em 0.38em;
  overflow-wrap: anywhere;
  border: 1px solid var(--color-border-soft);
  border-radius: var(--radius-small);
  color: var(--color-accent);
  background: var(--color-white-soft);
  font-size: 0.9em;
}

pre {
  max-width: 100%;
  padding: 20px;
  overflow-x: auto;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-medium);
  color: var(--color-text);
  background: var(--color-bg-deep);
  line-height: 1.65;
  overscroll-behavior-inline: contain;
  -webkit-overflow-scrolling: touch;
}

pre code {
  padding: 0;
  overflow-wrap: normal;
  border: 0;
  color: inherit;
  background: none;
  white-space: pre;
}

table {
  width: 100%;
  border-collapse: collapse;
}

th,
td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--color-border-soft);
  text-align: left;
  vertical-align: top;
}

th {
  color: var(--color-text);
  font-size: 13px;
  font-weight: 720;
}

td {
  color: var(--color-text-muted);
}

::selection {
  color: var(--color-text-dark);
  background: var(--color-accent);
}

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

.wrap {
  width: min(100%, calc(var(--page-width) + (var(--gutter) * 2)));
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.content-wrap {
  width: min(100%, calc(var(--content-width) + (var(--gutter) * 2)));
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.reading-wrap {
  width: min(100%, calc(var(--reading-width) + (var(--gutter) * 2)));
  margin-inline: auto;
  padding-inline: var(--gutter);
}

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

.section-compact {
  padding-top: clamp(48px, 6vw, 80px);
  padding-bottom: clamp(48px, 6vw, 80px);
}

.section-heading {
  max-width: 760px;
  margin-bottom: clamp(34px, 5vw, 58px);
}

.section-heading p {
  margin-bottom: 0;
  color: var(--color-text-muted);
  font-size: 17px;
}

.section-kicker {
  display: inline-flex;
  margin-bottom: 14px;
  align-items: center;
  gap: 8px;
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 740;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.section-kicker::before {
  width: 18px;
  height: 2px;
  flex-shrink: 0;
  content: "";
  border-radius: var(--radius-pill);
  background: var(--color-accent);
}

.muted {
  color: var(--color-text-muted);
}

.mono {
  font-family: var(--font-mono);
}

.surface {
  border: 1px solid var(--color-border-soft);
  border-radius: var(--radius-large);
  background: var(--color-panel);
  box-shadow: var(--shadow-panel);
}

.surface-light {
  color: var(--color-text-dark);
  background: var(--color-panel-light);
}

.surface-light h2,
.surface-light h3,
.surface-light h4 {
  color: var(--color-text-dark);
}

.surface-light p {
  color: var(--color-text-dark-muted);
}

.badge,
.tag,
.fact-pill {
  display: inline-flex;
  max-width: 100%;
  min-height: 30px;
  padding: 5px 11px;
  overflow: hidden;
  align-items: center;
  gap: 7px;
  border: 1px solid var(--color-border-soft);
  border-radius: var(--radius-pill);
  color: var(--color-text-muted);
  background: var(--color-white-soft);
  font-size: 12px;
  font-weight: 650;
  line-height: 1.4;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.badge-accent {
  border-color: var(--color-accent-glow);
  color: var(--color-accent);
  background: var(--color-accent-soft);
}

.badge-success {
  color: var(--color-success);
  background: var(--color-success-soft);
}

.status-pin {
  width: 8px;
  height: 8px;
  flex-shrink: 0;
  border-radius: 50%;
  background: var(--color-success);
  box-shadow: 0 0 0 5px var(--color-success-soft);
}

.button,
.cta {
  display: inline-flex;
  min-height: 48px;
  padding: 0 22px;
  align-items: center;
  justify-content: center;
  gap: 9px;
  border: 1px solid var(--color-transparent);
  border-radius: var(--radius-pill);
  font-size: 14px;
  font-weight: 740;
  line-height: 1;
  text-align: center;
  transition:
    transform var(--transition-fast),
    border-color var(--transition-fast),
    color var(--transition-fast),
    background-color var(--transition-fast),
    box-shadow var(--transition-fast);
}

.button:hover,
.cta:hover {
  transform: translateY(-2px);
}

.button-primary,
.cta-primary {
  color: var(--color-text-dark);
  background: var(--color-accent);
  box-shadow: var(--shadow-button);
}

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

.button-secondary,
.cta-secondary {
  border-color: var(--color-border);
  color: var(--color-text);
  background: var(--color-white-soft);
}

.button-secondary:hover,
.cta-secondary:hover {
  border-color: var(--color-accent);
  background: var(--color-accent-soft);
}

.button-quiet {
  color: var(--color-text-muted);
  background: var(--color-transparent);
}

.button-quiet:hover {
  color: var(--color-text);
  background: var(--color-white-soft);
}

.button:disabled,
.cta:disabled {
  cursor: not-allowed;
  opacity: 0.46;
  transform: none;
  box-shadow: none;
}

.button-small {
  min-height: 40px;
  padding-inline: 17px;
  font-size: 13px;
}

.icon-box {
  display: grid;
  width: 44px;
  height: 44px;
  flex-shrink: 0;
  place-items: center;
  border: 1px solid var(--color-accent-glow);
  border-radius: 14px;
  color: var(--color-accent);
  background: var(--color-accent-soft);
}

.icon-box svg {
  width: 22px;
  height: 22px;
}

.reveal {
  transition: opacity 620ms ease, transform 620ms var(--transition-smooth);
}

.reveal.pending {
  opacity: 0;
  transform: translateY(16px);
}

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

.site-header {
  position: relative;
  z-index: 100;
  height: var(--header-height);
  border-bottom: 1px solid var(--color-white-soft);
  background: var(--color-overlay);
  backdrop-filter: blur(18px);
}

.site-header-inner {
  position: relative;
  z-index: 4;
  display: flex;
  width: min(100%, calc(var(--page-width) + (var(--gutter) * 2)));
  height: 100%;
  margin-inline: auto;
  padding-inline: var(--gutter);
  align-items: center;
  gap: 20px;
}

.site-brand {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  gap: 11px;
}

.site-brand-mark {
  display: grid;
  width: 42px;
  height: 42px;
  overflow: hidden;
  flex-shrink: 0;
  place-items: center;
  border: 1px solid var(--color-accent-glow);
  border-radius: 50%;
  box-shadow: 0 8px 24px var(--color-accent-glow);
}

.site-brand-mark img {
  width: 100%;
  height: 100%;
}

.site-brand-copy {
  display: flex;
  align-items: baseline;
  gap: 8px;
  white-space: nowrap;
}

.site-brand-name {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 780;
  letter-spacing: -0.03em;
}

.site-brand-local {
  color: var(--color-text-muted);
  font-size: 12px;
  font-weight: 540;
}

.desktop-nav {
  display: flex;
  min-width: 0;
  margin-left: auto;
  align-items: center;
  justify-content: center;
  gap: 2px;
}

.nav-link {
  display: inline-flex;
  min-height: 38px;
  padding: 0 12px;
  align-items: center;
  border-radius: var(--radius-pill);
  color: var(--color-text-muted);
  font-size: 13px;
  font-weight: 560;
  line-height: 1;
  white-space: nowrap;
  transition: color var(--transition-fast), background-color var(--transition-fast);
}

.nav-link:hover {
  color: var(--color-text);
  background: var(--color-white-soft);
}

.nav-link.active,
.nav-link[aria-current="page"] {
  color: var(--color-text);
  background: var(--color-panel-soft);
  box-shadow: inset 0 0 0 1px var(--color-border-soft);
}

.header-tools {
  display: flex;
  flex: 0 0 auto;
  align-items: center;
  gap: 9px;
}

.language-menu {
  position: relative;
}

.language-trigger {
  display: inline-flex;
  min-height: 38px;
  padding: 0 12px;
  align-items: center;
  gap: 7px;
  border: 1px solid var(--color-border-soft);
  border-radius: var(--radius-pill);
  color: var(--color-text-muted);
  background: var(--color-white-soft);
  font-size: 12px;
  font-weight: 600;
}

.language-trigger svg {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
}

.language-dropdown {
  position: absolute;
  top: calc(100% + 10px);
  right: 0;
  z-index: 12;
  display: none;
  width: 176px;
  padding: 8px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-medium);
  background: var(--color-panel);
  box-shadow: var(--shadow-panel);
}

.language-menu.open .language-dropdown {
  display: grid;
}

.language-dropdown a {
  display: flex;
  min-height: 42px;
  padding: 0 11px;
  align-items: center;
  border-radius: var(--radius-small);
  color: var(--color-text-muted);
  font-size: 13px;
}

.language-dropdown a:hover,
.language-dropdown a.current {
  color: var(--color-text);
  background: var(--color-accent-soft);
}

.header-login {
  display: inline-flex;
  min-height: 38px;
  padding: 0 18px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-accent);
  border-radius: var(--radius-pill);
  color: var(--color-text);
  background: var(--color-accent-dark);
  font-size: 13px;
  font-weight: 720;
  white-space: nowrap;
  box-shadow: 0 8px 22px var(--color-shadow-soft);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.header-login:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-button);
}

.menu-toggle {
  display: none;
  min-width: 44px;
  min-height: 44px;
  padding: 0;
  place-items: center;
  border: 1px solid var(--color-border-soft);
  border-radius: 50%;
  color: var(--color-text);
  background: var(--color-white-soft);
}

.menu-toggle-lines,
.menu-toggle-lines::before,
.menu-toggle-lines::after {
  width: 18px;
  height: 2px;
  border-radius: var(--radius-pill);
  background: currentColor;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.menu-toggle-lines {
  position: relative;
}

.menu-toggle-lines::before,
.menu-toggle-lines::after {
  position: absolute;
  left: 0;
  content: "";
}

.menu-toggle-lines::before {
  top: -6px;
}

.menu-toggle-lines::after {
  top: 6px;
}

.menu-toggle[aria-expanded="true"] .menu-toggle-lines {
  background: var(--color-transparent);
}

.menu-toggle[aria-expanded="true"] .menu-toggle-lines::before {
  top: 0;
  transform: rotate(45deg);
}

.menu-toggle[aria-expanded="true"] .menu-toggle-lines::after {
  top: 0;
  transform: rotate(-45deg);
}

.mobile-nav {
  position: absolute;
  top: var(--header-height);
  right: 0;
  left: 0;
  z-index: 6;
  display: none;
  max-height: calc(100dvh - var(--header-height));
  padding: 12px var(--gutter) 22px;
  overflow-y: auto;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-panel);
  box-shadow: var(--shadow-window);
  overscroll-behavior: contain;
}

.mobile-nav.open {
  display: block;
}

.mobile-nav-group {
  display: grid;
  gap: 4px;
}

.mobile-nav a {
  display: flex;
  width: 100%;
  min-height: 48px;
  padding: 10px 14px;
  align-items: center;
  border-radius: var(--radius-small);
  color: var(--color-text-muted);
  font-size: 15px;
  font-weight: 620;
}

.mobile-nav a:hover,
.mobile-nav a.active,
.mobile-nav a[aria-current="page"] {
  color: var(--color-text);
  background: var(--color-accent-soft);
}

.mobile-language-title {
  margin: 16px 14px 5px;
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 720;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.nav-veil {
  position: fixed;
  inset: var(--header-height) 0 0;
  z-index: 2;
  display: none;
  border: 0;
  background: var(--color-overlay);
}

.nav-veil.open {
  display: block;
}

.page-shell {
  position: relative;
  min-height: calc(100vh - var(--header-height));
  overflow-x: clip;
  isolation: isolate;
}

.star-field {
  position: absolute;
  inset: 0;
  z-index: -3;
  opacity: 0.72;
  background-image:
    radial-gradient(circle, var(--color-white-strong) 0 1px, var(--color-transparent) 1.4px),
    radial-gradient(circle, var(--color-accent) 0 1px, var(--color-transparent) 1.5px),
    radial-gradient(circle, var(--color-text-muted) 0 1px, var(--color-transparent) 1.3px);
  background-position: 28px 36px, 84px 112px, 132px 64px;
  background-size: 154px 142px, 218px 204px, 281px 246px;
  mask-image: linear-gradient(90deg, var(--color-transparent), var(--color-bg) 27%, var(--color-bg) 100%);
  pointer-events: none;
}

.depth-orb {
  position: absolute;
  top: 88px;
  right: -46px;
  z-index: -2;
  width: min(660px, 54vw);
  aspect-ratio: 1;
  border: 1px solid var(--color-border-soft);
  border-radius: 50%;
  opacity: 0.46;
  pointer-events: none;
}

.depth-orb::before,
.depth-orb::after {
  position: absolute;
  content: "";
  border: 1px dashed var(--color-border-soft);
  border-radius: 50%;
}

.depth-orb::before {
  inset: 11%;
}

.depth-orb::after {
  inset: 23%;
}

.hero {
  position: relative;
  display: grid;
  width: min(100%, calc(var(--page-width) + (var(--gutter) * 2)));
  min-height: calc(900px - var(--header-height));
  margin-inline: auto;
  padding-inline: var(--gutter);
  grid-template-columns: minmax(430px, 0.84fr) minmax(590px, 1.16fr);
  align-items: center;
  gap: 42px;
}

.hero-copy {
  position: relative;
  z-index: 3;
  max-width: 590px;
  padding-bottom: 28px;
}

.eyebrow {
  display: inline-flex;
  max-width: 100%;
  padding: 8px 13px;
  overflow: hidden;
  align-items: center;
  gap: 9px;
  border: 1px solid var(--color-accent-glow);
  border-radius: var(--radius-pill);
  color: var(--color-text-muted);
  background: var(--color-accent-soft);
  font-size: 13px;
  font-weight: 620;
  line-height: 1.4;
}

.eyebrow-dot {
  width: 8px;
  height: 8px;
  flex-shrink: 0;
  border-radius: 50%;
  background: var(--color-success);
  box-shadow: 0 0 0 5px var(--color-success-soft);
}

.hero h1 {
  max-width: 610px;
  margin: 22px 0 24px;
  line-height: 1.04;
}

.title-brand,
.title-accent {
  display: block;
}

.title-accent {
  color: var(--color-accent);
  text-shadow: 0 0 30px var(--color-accent-glow);
}

.hero-actions {
  display: flex;
  margin-bottom: 23px;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
}

.hero-actions .cta {
  min-width: 132px;
  min-height: 50px;
  padding-inline: 23px;
  font-size: 15px;
}

.hero-description {
  max-width: 570px;
  margin: 0;
  color: var(--color-text-muted);
  font-size: 16px;
  line-height: 1.78;
}

.hero-description strong {
  color: var(--color-text);
  font-weight: 680;
}

.trust-row {
  display: flex;
  max-width: 610px;
  margin-top: 22px;
  flex-wrap: wrap;
  gap: 9px;
}

.trust-pill {
  display: inline-flex;
  min-height: 34px;
  padding: 0 12px;
  align-items: center;
  gap: 7px;
  border: 1px solid var(--color-border-soft);
  border-radius: var(--radius-pill);
  color: var(--color-text-muted);
  background: var(--color-panel);
  font-size: 12px;
  font-weight: 590;
  white-space: nowrap;
}

.trust-check {
  flex-shrink: 0;
  color: var(--color-success);
  font-size: 14px;
  font-weight: 800;
}

.hero-visual {
  position: relative;
  z-index: 2;
  display: flex;
  height: 100%;
  align-items: center;
  justify-content: flex-end;
  padding-bottom: 20px;
}

.visual-shadow {
  position: absolute;
  right: 1%;
  bottom: 77px;
  width: min(610px, 90%);
  height: 82px;
  border-radius: 50%;
  background: var(--color-shadow);
  filter: blur(24px);
  opacity: 0.72;
  transform: scaleX(0.92);
}

.chat-window {
  position: relative;
  width: min(664px, 100%);
  height: 638px;
  overflow: hidden;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-window);
  background: var(--color-panel);
  box-shadow: var(--shadow-window), inset 0 1px 0 var(--color-white-medium);
  backdrop-filter: blur(20px);
  animation: window-arrive 850ms var(--transition-smooth) both;
}

.chat-window::before {
  position: absolute;
  inset: 1px;
  z-index: 0;
  content: "";
  pointer-events: none;
  border-radius: calc(var(--radius-window) - 1px);
  background:
    radial-gradient(circle at 88% 14%, var(--color-accent-soft), var(--color-transparent) 24%),
    linear-gradient(135deg, var(--color-white-soft), var(--color-transparent) 34%);
}

.window-bar {
  position: relative;
  z-index: 3;
  display: flex;
  height: 74px;
  padding: 0 22px;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--color-border-soft);
  background: var(--color-overlay);
}

.window-title-group {
  display: flex;
  min-width: 0;
  align-items: center;
  gap: 13px;
}

.window-avatar {
  display: grid;
  width: 38px;
  height: 38px;
  flex-shrink: 0;
  place-items: center;
  border: 1px solid var(--color-accent-glow);
  border-radius: 13px;
  color: var(--color-text-dark);
  background: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 800;
  box-shadow: 0 8px 20px var(--color-accent-glow);
}

.window-heading {
  margin: 0 0 4px;
  overflow: hidden;
  color: var(--color-text);
  font-size: 14px;
  font-weight: 700;
  line-height: 1.2;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.window-subtitle {
  display: flex;
  margin: 0;
  align-items: center;
  gap: 7px;
  color: var(--color-text-muted);
  font-size: 11px;
}

.status-dot {
  width: 7px;
  height: 7px;
  flex-shrink: 0;
  border-radius: 50%;
  background: var(--color-success);
  box-shadow: 0 0 0 4px var(--color-success-soft);
  animation: status-pulse 2.4s ease-in-out infinite;
}

.window-tools {
  display: flex;
  flex-shrink: 0;
  gap: 7px;
}

.window-tool {
  width: 9px;
  height: 9px;
  border-radius: 50%;
}

.window-tool:nth-child(1) {
  background: var(--color-error);
}

.window-tool:nth-child(2) {
  background: var(--color-warn);
}

.window-tool:nth-child(3) {
  background: var(--color-success);
}

.thread {
  position: relative;
  z-index: 2;
  height: calc(100% - 74px);
  padding: 26px 27px 92px;
}

.route-rail {
  position: absolute;
  top: 45px;
  right: 30px;
  z-index: 1;
  width: 165px;
  height: 440px;
  color: var(--color-accent);
  opacity: 0.82;
  pointer-events: none;
}

.route-rail path {
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-dasharray: 5 9;
}

.route-rail circle {
  fill: var(--color-panel);
  stroke: currentColor;
  stroke-width: 2;
}

.route-node {
  position: absolute;
  z-index: 3;
  width: 12px;
  height: 12px;
  border: 3px solid var(--color-panel);
  border-radius: 50%;
  background: var(--color-accent);
  box-shadow: 0 0 0 5px var(--color-accent-soft);
  animation: node-pulse 2.8s ease-in-out infinite;
}

.route-node-one {
  top: 86px;
  right: 107px;
}

.route-node-two {
  top: 242px;
  right: 43px;
  animation-delay: 420ms;
}

.route-node-three {
  right: 90px;
  bottom: 75px;
  animation-delay: 820ms;
}

.message {
  position: relative;
  z-index: 2;
  border-radius: var(--radius-medium);
  box-shadow: var(--shadow-bubble);
}

.message-label {
  display: block;
  margin-bottom: 7px;
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.message-title {
  margin: 0 0 7px;
  font-size: 15px;
  font-weight: 760;
  line-height: 1.3;
}

.message-text {
  margin: 0;
  font-size: 12px;
  line-height: 1.55;
}

.message-connect {
  width: min(330px, 68%);
  padding: 17px 18px;
  color: var(--color-text-dark);
  background: var(--color-panel-light);
  animation: bubble-arrive 620ms 180ms var(--transition-smooth) both;
}

.message-connect .message-label {
  color: var(--color-accent-dark);
}

.message-connect .message-text {
  color: var(--color-text-dark-muted);
}

.connection-line {
  display: flex;
  margin-top: 12px;
  align-items: center;
  gap: 9px;
  color: var(--color-accent-dark);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
}

.connection-icon {
  display: grid;
  width: 23px;
  height: 23px;
  flex-shrink: 0;
  place-items: center;
  border-radius: 50%;
  color: var(--color-text-dark);
  background: var(--color-success);
  font-family: var(--font-body);
  font-size: 13px;
}

.message-routes {
  width: min(390px, 79%);
  margin: 21px 0 0 auto;
  padding: 17px 18px 16px;
  border: 1px solid var(--color-border-soft);
  color: var(--color-text);
  background: var(--color-panel-soft);
  animation: bubble-arrive-right 650ms 360ms var(--transition-smooth) both;
}

.message-routes .message-label {
  color: var(--color-accent);
}

.message-routes .message-text {
  color: var(--color-text-muted);
}

.route-list {
  display: grid;
  margin-top: 12px;
  gap: 7px;
}

.route-item {
  display: grid;
  min-height: 36px;
  padding: 0 10px;
  align-items: center;
  grid-template-columns: 26px minmax(0, 1fr) auto;
  gap: 8px;
  border: 1px solid var(--color-border-soft);
  border-radius: var(--radius-small);
  background: var(--color-white-soft);
}

.route-flag {
  flex-shrink: 0;
  font-size: 16px;
  line-height: 1;
}

.route-name {
  overflow: hidden;
  color: var(--color-text);
  font-size: 11px;
  font-weight: 650;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.route-type {
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 9px;
  font-weight: 650;
}

.route-item.selected {
  border-color: var(--color-accent);
  background: var(--color-accent-soft);
}

.route-item.selected .route-type {
  color: var(--color-accent);
}

.message-devices {
  width: min(354px, 72%);
  margin-top: 21px;
  padding: 16px 18px;
  color: var(--color-text-dark);
  background: var(--color-panel-light);
  animation: bubble-arrive 650ms 540ms var(--transition-smooth) both;
}

.message-devices .message-label {
  color: var(--color-accent-dark);
}

.message-devices .message-text {
  color: var(--color-text-dark-muted);
}

.platform-row {
  display: flex;
  margin-top: 11px;
  flex-wrap: wrap;
  gap: 6px;
}

.platform-chip {
  max-width: 100%;
  padding: 5px 8px;
  overflow: hidden;
  border: 1px solid var(--color-border-soft);
  border-radius: var(--radius-pill);
  color: var(--color-text-dark);
  background: var(--color-accent-soft);
  font-family: var(--font-mono);
  font-size: 9px;
  font-weight: 650;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.composer {
  position: absolute;
  right: 22px;
  bottom: 18px;
  left: 22px;
  z-index: 5;
  display: flex;
  height: 58px;
  padding: 8px 8px 8px 17px;
  align-items: center;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-medium);
  background: var(--color-bg-deep);
  box-shadow: 0 12px 30px var(--color-shadow-soft), inset 0 1px 0 var(--color-white-soft);
}

.composer-copy {
  min-width: 0;
  overflow: hidden;
  color: var(--color-text-muted);
  font-size: 12px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.composer-copy strong {
  color: var(--color-text);
  font-weight: 680;
}

.send-button {
  display: grid;
  width: 42px;
  height: 42px;
  margin-left: auto;
  flex-shrink: 0;
  place-items: center;
  border: 0;
  border-radius: 13px;
  color: var(--color-text-dark);
  background: var(--color-accent);
  box-shadow: 0 8px 20px var(--color-accent-glow);
}

.send-button svg {
  width: 20px;
  height: 20px;
  fill: currentColor;
  animation: plane-depart 2.8s ease-in-out infinite;
  transform-origin: center;
}

.fact-ribbon {
  position: absolute;
  top: 150px;
  right: -22px;
  z-index: 6;
  display: inline-flex;
  min-height: 42px;
  padding: 0 15px;
  align-items: center;
  gap: 10px;
  border: 1px solid var(--color-accent-glow);
  border-radius: var(--radius-pill);
  color: var(--color-text);
  background: var(--color-panel);
  box-shadow: var(--shadow-bubble);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  animation: ribbon-float 4s ease-in-out infinite;
}

.fact-ribbon::before {
  width: 8px;
  height: 8px;
  flex-shrink: 0;
  content: "";
  border-radius: 50%;
  background: var(--color-success);
  box-shadow: 0 0 0 5px var(--color-success-soft);
}

.site-footer {
  position: relative;
  overflow-x: clip;
  border-top: 1px solid var(--color-border-soft);
  background: var(--color-bg-deep);
}

.footer-grid {
  display: grid;
  width: min(100%, calc(var(--page-width) + (var(--gutter) * 2)));
  margin-inline: auto;
  padding: 68px var(--gutter) 44px;
  grid-template-columns: minmax(240px, 1.25fr) repeat(3, minmax(150px, 0.75fr));
  gap: 48px;
}

.footer-brand {
  max-width: 340px;
}

.footer-brand .site-brand {
  margin-bottom: 18px;
}

.footer-brand p {
  color: var(--color-text-muted);
  font-size: 14px;
}

.footer-title {
  margin-bottom: 16px;
  color: var(--color-text);
  font-size: 13px;
  font-weight: 750;
}

.footer-links {
  display: grid;
  gap: 9px;
}

.footer-links a {
  width: fit-content;
  max-width: 100%;
  color: var(--color-text-muted);
  font-size: 13px;
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--color-accent);
}

.footer-bottom {
  display: flex;
  width: min(100%, calc(var(--page-width) + (var(--gutter) * 2)));
  min-height: 74px;
  margin-inline: auto;
  padding: 20px var(--gutter);
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  border-top: 1px solid var(--color-white-soft);
  color: var(--color-text-muted);
  font-size: 12px;
}

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-legal a:hover {
  color: var(--color-text);
}

.prose {
  color: var(--color-text-muted);
}

.prose > * {
  max-width: 100%;
}

.prose h2,
.prose h3,
.prose h4 {
  padding-top: 0.6em;
  color: var(--color-text);
}

.prose a {
  color: var(--color-accent);
  text-decoration: underline;
  text-decoration-color: var(--color-accent-glow);
  text-underline-offset: 0.18em;
}

.prose strong {
  color: var(--color-text);
}

.prose ol {
  counter-reset: prose-step;
  list-style: none;
  padding-left: 0;
}

.prose ol > li {
  position: relative;
  min-height: 36px;
  padding-left: 48px;
  counter-increment: prose-step;
}

.prose ol > li::before {
  position: absolute;
  top: 0;
  left: 0;
  display: grid;
  width: 32px;
  height: 32px;
  content: counter(prose-step);
  place-items: center;
  border: 1px solid var(--color-accent-glow);
  border-radius: 50%;
  color: var(--color-accent);
  background: var(--color-accent-soft);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 750;
}

body:has(.toc-tabs) section[id] {
  scroll-margin-top: var(--toc-offset);
}

.toc-pass-through {
  display: contents;
}

@keyframes window-arrive {
  from {
    opacity: 0;
    transform: translateY(18px) scale(0.985);
  }

  to {
    opacity: 1;
    transform: none;
  }
}

@keyframes bubble-arrive {
  from {
    opacity: 0;
    transform: translateX(-16px);
  }

  to {
    opacity: 1;
    transform: none;
  }
}

@keyframes bubble-arrive-right {
  from {
    opacity: 0;
    transform: translateX(16px);
  }

  to {
    opacity: 1;
    transform: none;
  }
}

@keyframes status-pulse {
  50% {
    opacity: 0.55;
    transform: scale(0.84);
  }
}

@keyframes node-pulse {
  50% {
    box-shadow: 0 0 0 9px var(--color-accent-soft);
  }
}

@keyframes plane-depart {
  0%,
  72%,
  100% {
    transform: translate(0, 0) rotate(0);
  }

  82% {
    transform: translate(4px, -4px) rotate(-4deg);
  }

  90% {
    transform: translate(1px, -1px) rotate(0);
  }
}

@keyframes ribbon-float {
  50% {
    transform: translateY(-5px);
  }
}

@media (max-width: 1180px) {
  .desktop-nav {
    gap: 0;
  }

  .nav-link {
    padding-inline: 9px;
    font-size: 12px;
  }

  .hero {
    min-height: 760px;
    grid-template-columns: minmax(380px, 0.85fr) minmax(520px, 1.15fr);
    gap: 26px;
  }

  .chat-window {
    height: 600px;
  }

  .fact-ribbon {
    right: 8px;
  }
}

@media (max-width: 960px) {
  :root {
    --header-height: 76px;
  }

  .desktop-nav,
  .language-menu {
    display: none;
  }

  .header-tools {
    margin-left: auto;
  }

  .menu-toggle {
    display: grid;
  }

  .hero {
    min-height: auto;
    padding-top: 72px;
    padding-bottom: 86px;
    grid-template-columns: 1fr;
  }

  .hero-copy {
    max-width: 720px;
    padding-bottom: 0;
  }

  .hero h1 {
    max-width: 760px;
  }

  .hero-visual {
    min-height: 650px;
    justify-content: center;
    padding-bottom: 0;
  }

  .chat-window {
    width: min(664px, 92vw);
  }

  .depth-orb {
    top: 36%;
    right: -18%;
    width: 80vw;
  }

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

@media (max-width: 640px) {
  :root {
    --gutter: 16px;
    --section-space: 72px;
    --toc-offset: 92px;
  }

  body {
    font-size: 15px;
  }

  h1 {
    font-size: clamp(42px, 13vw, 58px);
  }

  h2 {
    font-size: clamp(30px, 9vw, 40px);
  }

  .site-brand-copy {
    gap: 5px;
  }

  .site-brand-local {
    display: none;
  }

  .site-brand-mark {
    width: 38px;
    height: 38px;
  }

  .header-login {
    min-height: 40px;
    padding-inline: 14px;
  }

  .hero {
    padding-top: 48px;
    padding-bottom: 68px;
    gap: 42px;
  }

  .hero h1 {
    margin-top: 18px;
    margin-bottom: 20px;
  }

  .hero-actions {
    margin-bottom: 18px;
  }

  .hero-actions .cta {
    min-width: min(152px, calc(50% - 6px));
    flex: 1 1 140px;
  }

  .hero-description {
    font-size: 15px;
    line-height: 1.65;
  }

  .trust-row {
    gap: 7px;
  }

  .trust-pill {
    min-height: 32px;
    padding-inline: 10px;
    font-size: 11px;
  }

  .hero-visual {
    min-height: 520px;
  }

  .chat-window {
    width: 100%;
    height: 510px;
    border-radius: var(--radius-large);
  }

  .window-bar {
    height: 64px;
    padding-inline: 15px;
  }

  .window-avatar {
    width: 34px;
    height: 34px;
  }

  .window-tools {
    display: none;
  }

  .thread {
    height: calc(100% - 64px);
    padding: 18px 14px 80px;
  }

  .route-rail,
  .route-node,
  .fact-ribbon {
    display: none;
  }

  .message-connect {
    width: 79%;
    padding: 13px 14px;
  }

  .message-routes {
    width: 89%;
    margin-top: 13px;
    padding: 13px 14px;
  }

  .message-devices {
    width: 82%;
    margin-top: 13px;
    padding: 13px 14px;
  }

  .message-title {
    font-size: 13px;
  }

  .message-text {
    font-size: 10px;
  }

  .route-list {
    margin-top: 8px;
    gap: 5px;
  }

  .route-item {
    min-height: 31px;
  }

  .composer {
    right: 12px;
    bottom: 12px;
    left: 12px;
    height: 54px;
    padding-left: 13px;
  }

  .send-button {
    width: 38px;
    height: 38px;
  }

  .footer-grid {
    padding-top: 54px;
    grid-template-columns: 1fr;
    gap: 34px;
  }

  .footer-bottom {
    align-items: flex-start;
    flex-direction: column;
  }

  .tilt,
  .tilt-left,
  .tilt-right,
  [class*="tilt-"] {
    transform: none;
  }

  .button,
  .cta,
  .badge,
  .tag,
  .fact-pill {
    max-width: 100%;
  }
}

@media (max-width: 380px) {
  .site-brand-name {
    font-size: 18px;
  }

  .header-login {
    padding-inline: 11px;
    font-size: 12px;
  }

  .header-tools {
    gap: 6px;
  }

  .menu-toggle {
    min-width: 44px;
  }

  .route-item {
    grid-template-columns: 22px minmax(0, 1fr);
  }

  .route-type {
    display: none;
  }

  .platform-chip:nth-child(n + 4) {
    display: none;
  }
}

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

  *,
  *::before,
  *::after {
    scroll-behavior: auto;
    animation-duration: 1ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 1ms !important;
  }

  .reveal,
  .reveal.pending,
  .reveal.shown {
    opacity: 1;
    transform: none;
  }
}