:root {
  --color-bg: #050505;
  --color-panel: #11100e;
  --color-panel-raised: #191816;
  --color-panel-deep: #0b0b0a;
  --color-border: #2b2b2b;
  --color-border-soft: #20201f;
  --color-accent: #ffc247;
  --color-accent-dark: #9a6400;
  --color-text: #f7f7f5;
  --color-text-muted: #a3a3a0;
  --color-text-dim: #727270;
  --color-black: #000000;
  --color-white-soft: #e7e7e7;
  --color-transparent: transparent;
  --color-grid: rgba(247, 247, 245, 0.035);
  --color-panel-glass: rgba(17, 16, 14, 0.88);
  --color-panel-glass-strong: rgba(25, 24, 22, 0.94);
  --color-accent-soft: rgba(255, 194, 71, 0.12);
  --color-accent-medium: rgba(255, 194, 71, 0.28);
  --color-accent-glow: rgba(255, 194, 71, 0.42);
  --color-shadow: rgba(0, 0, 0, 0.72);
  --color-shadow-soft: rgba(0, 0, 0, 0.38);
  --color-overlay: rgba(0, 0, 0, 0.76);
  --color-focus: rgba(255, 194, 71, 0.34);
  --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-xs: 6px;
  --radius-sm: 10px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-xl: 30px;
  --radius-pill: 999px;
  --page-width: 1240px;
  --reading-width: 768px;
  --header-height: 82px;
  --gutter: clamp(16px, 4vw, 32px);
  --section-space: clamp(72px, 10vw, 136px);
  --toc-offset: 16px;
  --toc-height: 54px;
  --shadow-panel: 0 24px 72px var(--color-shadow-soft);
  --shadow-deep: 0 42px 90px var(--color-shadow);
  --transition-fast: 180ms ease;
  --transition-medium: 360ms cubic-bezier(0.2, 0.75, 0.25, 1);
}

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

html {
  color-scheme: dark;
  background: var(--color-bg);
  scroll-behavior: smooth;
  scrollbar-color: var(--color-border) 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:
    linear-gradient(var(--color-grid) 1px, var(--color-transparent) 1px),
    linear-gradient(90deg, var(--color-grid) 1px, var(--color-transparent) 1px),
    var(--color-bg);
  background-size: 72px 72px;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

img {
  height: auto;
}

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

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

button {
  border: 0;
}

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

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

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

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

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

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

code,
kbd,
samp {
  font-family: var(--font-mono);
  font-size: 0.9em;
}

code {
  overflow-wrap: anywhere;
}

:not(pre) > code {
  padding: 0.15em 0.42em;
  color: var(--color-accent);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xs);
  background: var(--color-panel);
}

pre {
  max-width: 100%;
  padding: 20px;
  overflow-x: auto;
  color: var(--color-white-soft);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-panel-deep);
  overscroll-behavior-inline: contain;
  -webkit-overflow-scrolling: touch;
}

pre code {
  display: block;
  min-width: max-content;
  overflow-wrap: normal;
}

hr {
  margin: 48px 0;
  border: 0;
  border-top: 1px solid var(--color-border);
}

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

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

th {
  color: var(--color-text);
  font-size: 13px;
  font-weight: 650;
}

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

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

:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
}

.skip-link {
  position: fixed;
  z-index: 1000;
  top: 10px;
  left: 10px;
  padding: 10px 14px;
  color: var(--color-bg);
  border-radius: var(--radius-sm);
  background: var(--color-accent);
  transform: translateY(-160%);
}

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

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

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

.section {
  position: relative;
  overflow-x: clip;
  padding-top: var(--section-space);
  padding-bottom: var(--section-space);
}

.section-tight {
  padding-top: calc(var(--section-space) * 0.65);
  padding-bottom: calc(var(--section-space) * 0.65);
}

.grid,
.flex-row,
.card,
.panel,
.prose,
.site-main,
section,
article,
aside {
  min-width: 0;
}

.flex-row {
  display: flex;
  align-items: center;
  gap: 16px;
}

.grid {
  display: grid;
  gap: 20px;
}

.stack > * + * {
  margin-top: 20px;
}

.kicker,
.eyebrow {
  display: inline-flex;
  max-width: 100%;
  min-height: 30px;
  align-items: center;
  gap: 9px;
  padding: 0 12px 0 9px;
  overflow: hidden;
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  background: var(--color-panel-deep);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
}

.kicker-dot,
.eyebrow-dot,
.status-dot {
  width: 7px;
  height: 7px;
  flex-shrink: 0;
  border-radius: var(--radius-pill);
  background: var(--color-accent);
  box-shadow: 0 0 11px var(--color-accent-glow);
}

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

h1,
.hero-title {
  margin-bottom: 24px;
  font-size: clamp(52px, 5.5vw, 72px);
  font-weight: 760;
  line-height: 1.1;
  letter-spacing: -0.02em;
}

h2 {
  margin-bottom: 20px;
  font-size: clamp(34px, 4vw, 52px);
  font-weight: 720;
  line-height: 1.16;
  letter-spacing: -0.02em;
}

h3 {
  margin-bottom: 14px;
  font-size: clamp(22px, 2.4vw, 30px);
  font-weight: 690;
  line-height: 1.3;
  letter-spacing: -0.015em;
}

h4 {
  margin-bottom: 10px;
  font-size: 18px;
  line-height: 1.4;
}

.lead {
  width: 100%;
  max-width: 720px;
  min-width: 0;
  overflow-wrap: anywhere;
  color: var(--color-text-muted);
  font-size: clamp(18px, 2vw, 22px);
  line-height: 1.65;
}

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

.text-gradient {
  color: var(--color-accent);
  background: linear-gradient(95deg, var(--color-accent), var(--color-text), var(--color-accent));
  background-size: 220% 100%;
  background-position: 0 0;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: var(--color-transparent);
}

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

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

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

.actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 11px;
}

.button,
.cta {
  display: inline-flex;
  min-width: 132px;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  gap: 9px;
  padding: 0 20px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 14px;
  font-weight: 720;
  line-height: 1;
  transition:
    color var(--transition-fast),
    background var(--transition-fast),
    border-color var(--transition-fast),
    transform var(--transition-fast);
}

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

.button-primary,
.cta-primary {
  color: var(--color-bg);
  border-color: var(--color-accent);
  background: var(--color-accent);
  box-shadow:
    inset 0 1px 0 var(--color-text),
    0 10px 28px var(--color-accent-soft);
}

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

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

.button-secondary:hover,
.cta-secondary:hover {
  border-color: var(--color-text-dim);
  background: var(--color-panel-raised);
}

.button-ghost {
  min-width: 0;
  color: var(--color-text-muted);
  background: var(--color-transparent);
}

.button:disabled,
.button[aria-disabled="true"] {
  cursor: not-allowed;
  opacity: 0.45;
  transform: none;
}

.button-arrow {
  flex-shrink: 0;
  font-family: var(--font-mono);
  font-size: 16px;
}

.badge,
.chip {
  display: inline-flex;
  max-width: 100%;
  min-height: 28px;
  align-items: center;
  gap: 7px;
  padding: 4px 10px;
  overflow: hidden;
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  background: var(--color-panel-deep);
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.35;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.badge-accent,
.chip-active {
  color: var(--color-accent);
  border-color: var(--color-accent-dark);
  background: var(--color-accent-soft);
}

.chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.panel,
.card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-panel);
  box-shadow: var(--shadow-panel);
}

.panel {
  padding: clamp(22px, 4vw, 38px);
}

.card {
  padding: 24px;
}

.surface-raised {
  background: var(--color-panel-raised);
}

.fact-strip {
  display: flex;
  max-width: 100%;
  align-items: stretch;
  overflow-x: auto;
  border-top: 1px solid var(--color-border-soft);
  border-bottom: 1px solid var(--color-border-soft);
  scrollbar-width: thin;
}

.fact-item {
  display: flex;
  min-width: max-content;
  align-items: center;
  gap: 8px;
  padding: 14px 20px;
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 12px;
}

.fact-item:first-child {
  padding-left: 0;
}

.fact-item + .fact-item {
  border-left: 1px solid var(--color-border);
}

.fact-mark {
  flex-shrink: 0;
  color: var(--color-accent);
}

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

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

.prose h2 {
  margin-top: 72px;
  scroll-margin-top: calc(var(--toc-offset) + var(--toc-height) + 24px);
}

.prose h3 {
  margin-top: 42px;
}

.prose p,
.prose li {
  overflow-wrap: break-word;
}

.prose a:not(.button) {
  color: var(--color-text);
  text-decoration: underline;
  text-decoration-color: var(--color-accent-dark);
  text-underline-offset: 4px;
}

.prose blockquote {
  margin-inline: 0;
}

.prose > .data-table {
  display: block;
  max-width: 100%;
  min-width: 0;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.reveal {
  transition:
    opacity 620ms ease,
    transform 620ms cubic-bezier(0.2, 0.72, 0.2, 1);
}

.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-border-soft);
  background: var(--color-bg);
}

.header-inner {
  position: relative;
  display: flex;
  width: 100%;
  max-width: calc(var(--page-width) + var(--gutter) * 2);
  height: 100%;
  align-items: center;
  gap: 28px;
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.brand {
  display: inline-flex;
  min-width: 192px;
  flex: 0 0 auto;
  align-items: center;
  gap: 11px;
}

.brand-logo {
  width: 35px;
  height: 35px;
  flex-shrink: 0;
  border-radius: var(--radius-pill);
  box-shadow: 0 8px 22px var(--color-shadow-soft);
}

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

.brand-en {
  color: var(--color-text);
  font-size: 16px;
  font-weight: 750;
  letter-spacing: -0.03em;
}

.brand-local {
  color: var(--color-text-muted);
  font-size: 13px;
  font-weight: 500;
}

.desktop-nav {
  display: flex;
  min-width: 0;
  flex: 1 1 auto;
  align-items: center;
  justify-content: center;
  white-space: nowrap;
}

.desktop-nav a {
  position: relative;
  padding: 9px 10px;
  color: var(--color-text-muted);
  font-size: 13px;
  font-weight: 500;
  transition: color var(--transition-fast);
}

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

.desktop-nav a[aria-current="page"]::after {
  position: absolute;
  right: 10px;
  bottom: 3px;
  left: 10px;
  height: 1px;
  background: var(--color-accent);
  box-shadow: 0 0 8px var(--color-accent-glow);
  content: "";
}

.nav-separator {
  flex-shrink: 0;
  color: var(--color-text-dim);
  font-family: var(--font-mono);
  font-size: 10px;
  user-select: none;
}

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

.language-control {
  position: relative;
}

.language-button,
.header-login,
.menu-toggle {
  display: inline-flex;
  min-height: 36px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  white-space: nowrap;
}

.language-button {
  gap: 7px;
  padding: 0 12px;
  color: var(--color-text-muted);
  background: var(--color-panel-deep);
  font-size: 12px;
}

.language-button::after {
  color: var(--color-text-dim);
  content: "⌄";
}

.language-menu {
  position: absolute;
  z-index: 130;
  top: calc(100% + 9px);
  right: 0;
  display: none;
  width: 168px;
  padding: 7px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-panel-raised);
  box-shadow: var(--shadow-deep);
}

.language-menu.open {
  display: block;
}

.language-menu a {
  display: flex;
  min-height: 40px;
  align-items: center;
  padding: 0 11px;
  color: var(--color-text-muted);
  border-radius: var(--radius-xs);
  font-size: 13px;
}

.language-menu a:hover,
.language-menu a[aria-current="true"] {
  color: var(--color-text);
  background: var(--color-panel);
}

.header-login {
  padding: 0 17px;
  color: var(--color-bg);
  border-color: var(--color-text);
  background: var(--color-text);
  font-size: 13px;
  font-weight: 700;
  transition:
    transform var(--transition-fast),
    background var(--transition-fast);
}

.header-login:hover {
  background: var(--color-white-soft);
  transform: translateY(-1px);
}

.menu-toggle {
  display: none;
  min-width: 44px;
  min-height: 44px;
  padding: 0;
  color: var(--color-text);
  background: var(--color-panel-deep);
}

.menu-icon,
.menu-icon::before,
.menu-icon::after {
  width: 18px;
  height: 1px;
  background: currentColor;
  transition: transform var(--transition-fast);
}

.menu-icon {
  position: relative;
}

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

.menu-icon::before {
  top: -6px;
}

.menu-icon::after {
  top: 6px;
}

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

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

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

.mobile-drawer {
  position: fixed;
  z-index: 120;
  top: var(--header-height);
  right: 0;
  left: 0;
  display: none;
  max-height: calc(100dvh - var(--header-height));
  padding: 12px var(--gutter) 24px;
  overflow-y: auto;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  background: var(--color-panel-deep);
  box-shadow: var(--shadow-deep);
  overscroll-behavior: contain;
}

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

.mobile-drawer a {
  display: flex;
  width: 100%;
  min-height: 48px;
  align-items: center;
  justify-content: space-between;
  padding: 0 12px;
  color: var(--color-text-muted);
  border-bottom: 1px solid var(--color-border-soft);
}

.mobile-drawer a:hover,
.mobile-drawer a[aria-current="page"] {
  color: var(--color-text);
}

.mobile-drawer a[aria-current="page"]::after {
  color: var(--color-accent);
  content: "●";
  font-size: 8px;
}

.drawer-languages {
  padding-top: 12px;
}

.drawer-label {
  padding: 8px 12px;
  color: var(--color-text-dim);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
}

.nav-veil {
  position: fixed;
  z-index: 90;
  inset: var(--header-height) 0 0;
  display: none;
  background: var(--color-overlay);
}

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

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

.footer-main {
  display: grid;
  grid-template-columns: minmax(260px, 1.25fr) repeat(3, minmax(150px, 0.75fr));
  gap: 56px;
  padding-top: 72px;
  padding-bottom: 56px;
}

.footer-brand .brand {
  margin-bottom: 20px;
}

.footer-brand p {
  max-width: 380px;
  margin-bottom: 0;
  font-size: 14px;
}

.footer-heading {
  margin-bottom: 17px;
  color: var(--color-text);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.1em;
}

.footer-links {
  display: grid;
  gap: 10px;
}

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

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

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding-top: 22px;
  padding-bottom: 28px;
  color: var(--color-text-dim);
  border-top: 1px solid var(--color-border-soft);
  font-family: var(--font-mono);
  font-size: 11px;
}

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

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

.tilt,
.tilt-card {
  transform: rotate(-0.35deg);
}

body:has(.toc-tabs) section[id] {
  scroll-margin-top: calc(var(--toc-offset) + var(--toc-height) + 24px);
}

@media (max-width: 1080px) {
  .desktop-nav {
    gap: 0;
  }

  .desktop-nav a {
    padding-inline: 7px;
    font-size: 12px;
  }

  .nav-separator {
    font-size: 8px;
  }

  .brand {
    min-width: 160px;
  }

  .brand-local {
    display: none;
  }

  .footer-main {
    grid-template-columns: 1.2fr repeat(2, 0.8fr);
  }

  .footer-main > :last-child {
    grid-column: 2 / -1;
  }
}

@media (max-width: 860px) {
  :root {
    --header-height: 70px;
  }

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

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

  .menu-toggle {
    display: inline-flex;
  }

  .brand {
    min-width: 0;
  }

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

  .footer-main > :last-child {
    grid-column: auto;
  }
}

@media (max-width: 768px) {
  h1,
  .hero-title {
    font-size: clamp(28px, 9.5vw, 40px);
    line-height: 1.12;
    letter-spacing: -0.02em;
  }

  h2 {
    font-size: clamp(28px, 8vw, 38px);
  }

  .lead {
    max-width: 100%;
    font-size: 18px;
  }

  .home-hero-poster,
  .ai-hero-copy,
  .media-hero-copy,
  .network-hero-copy {
    width: 100%;
    min-width: 0;
    max-width: 100%;
  }

  .desktop-only,
  .decorative-label,
  .hero-coordinate,
  .section-watermark {
    display: none;
  }

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

@media (max-width: 640px) {
  :root {
    --gutter: 16px;
    --section-space: 72px;
    --toc-offset: 8px;
  }

  body {
    background-size: 48px 48px;
  }

  .wrap,
  .reading-wrap {
    width: 100%;
    padding-inline: var(--gutter);
  }

  .header-inner {
    gap: 10px;
    padding-inline: var(--gutter);
  }

  .brand-copy {
    gap: 5px;
  }

  .brand-en {
    font-size: 15px;
  }

  .brand-local {
    display: none;
  }

  .header-login {
    min-height: 40px;
    padding-inline: 13px;
  }

  .actions {
    align-items: stretch;
  }

  .actions .button,
  .actions .cta {
    flex: 1 1 140px;
  }

  .fact-strip {
    margin-inline: 0;
  }

  .fact-item {
    padding-inline: 14px;
  }

  .footer-main {
    grid-template-columns: 1fr;
    gap: 36px;
    padding-top: 56px;
  }

  .footer-main > :last-child {
    grid-column: auto;
  }

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

  .panel,
  .card {
    border-radius: var(--radius-md);
  }

  th,
  td {
    padding: 12px;
  }
}

@media (max-width: 380px) {
  .header-login {
    padding-inline: 10px;
    font-size: 12px;
  }

  .brand-logo {
    width: 32px;
    height: 32px;
  }

  .brand-en {
    font-size: 14px;
  }
}

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

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

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