@view-transition {
  navigation: auto;
}

:root {
  color-scheme: dark;
  --bg: #0d0e12;
  --bg: oklch(0.16 0.01 270);
  --surface: #15171d;
  --surface: oklch(0.205 0.012 270);
  --surface-raised: #1a1c23;
  --surface-raised: oklch(0.235 0.014 270);
  --text: #f4f2ec;
  --text: oklch(0.96 0.012 90);
  --muted: #a7a8b0;
  --muted: oklch(0.72 0.012 270);
  --line: #30323a;
  --line: oklch(0.32 0.014 270);
  --line-strong: #4b4d57;
  --line-strong: oklch(0.42 0.016 270);
  --accent: #e6bd32;
  --accent: oklch(0.8 0.16 92);
  --accent-strong: #ffd451;
  --accent-strong: oklch(0.88 0.16 95);
  --on-accent: #1b1a15;
  --on-accent: oklch(0.18 0.02 90);
  --font-display: "Fraunces", Georgia, serif;
  --font-body: "DM Sans", Arial, sans-serif;
  --font-mono: "IBM Plex Mono", Consolas, monospace;
  --page: 1160px;
  --gutter: clamp(1.25rem, 5vw, 4rem);
  --section-y: clamp(4.5rem, 9vw, 8rem);
  --fast: 150ms;
  --enter: 700ms;
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
}

.locale-ko {
  --font-display: "Fraunces", "Hahmlet", serif;
  --font-body: "DM Sans", "Pretendard Variable", "Pretendard", sans-serif;
}

.locale-ja {
  --font-display: "Fraunces", "Noto Serif JP", serif;
  --font-body: "DM Sans", "Noto Sans JP", sans-serif;
}

.locale-zh {
  --font-display: "Fraunces", "Noto Serif SC", serif;
  --font-body: "DM Sans", "Noto Sans SC", sans-serif;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 5.5rem;
  background: var(--bg);
}

body {
  margin: 0;
  min-width: 320px;
  background:
    linear-gradient(90deg, transparent calc(50% - 0.5px), color-mix(in oklch, var(--line) 42%, transparent) 50%, transparent calc(50% + 0.5px)),
    var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.65;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

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

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

button,
a {
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}

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

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

.skip-link {
  position: fixed;
  z-index: 100;
  top: 0.75rem;
  left: 0.75rem;
  padding: 0.75rem 1rem;
  transform: translateY(-180%);
  background: var(--accent);
  color: var(--on-accent);
  font-weight: 700;
  transition: transform var(--fast);
}

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

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

.site-header {
  position: sticky;
  z-index: 20;
  top: 0;
  border-bottom: 1px solid var(--line);
  background: rgba(13, 14, 18, 0.92);
  background: color-mix(in oklch, var(--bg) 92%, transparent);
  backdrop-filter: blur(14px);
}

.nav-shell {
  min-height: 4.5rem;
  display: flex;
  align-items: center;
  gap: clamp(1rem, 3vw, 2.25rem);
}

.brand {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  gap: 0.65rem;
  flex: none;
}

.brand-mark {
  display: grid;
  width: 2rem;
  height: 2rem;
  place-items: center;
  border: 1px solid var(--line-strong);
  color: var(--accent);
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
}

.brand-name {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 600;
}

.brand-name small {
  margin-left: 0.4rem;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.58rem;
  font-weight: 600;
  letter-spacing: 0.14em;
}

.section-nav {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  margin-left: auto;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.section-nav a {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  transition: color var(--fast);
}

.section-nav a:hover {
  color: var(--text);
}

.locale-nav {
  display: flex;
  align-items: center;
  border: 1px solid var(--line);
}

.locale-link {
  display: grid;
  min-width: 44px;
  min-height: 44px;
  place-items: center;
  border-right: 1px solid var(--line);
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 600;
  text-transform: uppercase;
  transition: background var(--fast), color var(--fast);
}

.locale-link:last-child {
  border-right: 0;
}

.locale-link:hover,
.locale-link[aria-current="page"] {
  background: var(--surface-raised);
  color: var(--text);
}

.github-link {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  padding: 0 1rem;
  background: var(--accent);
  color: var(--on-accent);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  transition: background var(--fast), transform var(--fast);
}

.github-link:hover {
  background: var(--accent-strong);
  transform: translateY(-1px);
}

.hero {
  min-height: calc(100dvh - 4.5rem);
  display: grid;
  align-items: center;
  border-bottom: 1px solid var(--line);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(19rem, 0.7fr);
  gap: clamp(3rem, 8vw, 7rem);
  padding-block: clamp(5rem, 10vw, 8.5rem);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  margin: 0 0 1.5rem;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

.eyebrow::before {
  width: 1.7rem;
  height: 2px;
  content: "";
  background: var(--accent);
}

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

h1 {
  max-width: 13ch;
  margin-bottom: 1.75rem;
  font-family: var(--font-display);
  font-size: clamp(3.25rem, 7.7vw, 6.8rem);
  font-weight: 600;
  letter-spacing: -0.045em;
  line-height: 0.98;
  text-wrap: balance;
}

.locale-ja h1,
.locale-zh h1 {
  max-width: 11ch;
  letter-spacing: -0.035em;
  line-height: 1.08;
}

.locale-zh h1 {
  font-size: clamp(2.7rem, 12vw, 6rem);
}

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

.accent-block {
  display: block;
}

.locale-ko :where(h1, h2, h3, p, dt, dd, li) {
  word-break: keep-all;
  overflow-wrap: break-word;
}

.hero-lede {
  max-width: 42rem;
  margin-bottom: 2rem;
  color: var(--muted);
  font-size: clamp(1.05rem, 1.5vw, 1.22rem);
  text-wrap: pretty;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  padding: 0.7rem 1.15rem;
  border: 1px solid var(--line-strong);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  transition: border-color var(--fast), background var(--fast), color var(--fast);
}

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

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

.button-secondary:hover {
  border-color: var(--text);
  background: var(--surface);
}

.signal-board {
  align-self: end;
  border-top: 1px solid var(--line-strong);
  border-left: 1px solid var(--line);
}

.metric {
  display: grid;
  grid-template-columns: 5.25rem 1fr;
  align-items: baseline;
  gap: 1rem;
  min-height: 6.2rem;
  padding: 1.25rem 0 1.25rem 1.35rem;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.metric strong {
  color: var(--text);
  font-family: var(--font-display);
  font-size: 2.65rem;
  font-weight: 600;
  line-height: 1;
  font-variant-numeric: tabular-nums;
}

.metric span {
  color: var(--muted);
  font-size: 0.9rem;
}

.metric:first-child strong {
  color: var(--accent);
}

.section {
  padding-block: var(--section-y);
  border-bottom: 1px solid var(--line);
}

.section[id] {
  scroll-margin-top: 5.5rem;
}

.section-head {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(18rem, 0.55fr);
  gap: clamp(2rem, 8vw, 7rem);
  align-items: end;
  margin-bottom: clamp(2.5rem, 6vw, 4.5rem);
}

.section-index {
  display: block;
  margin-bottom: 0.75rem;
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.12em;
}

h2 {
  margin-bottom: 0;
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 5vw, 4.2rem);
  font-weight: 600;
  letter-spacing: -0.035em;
  line-height: 1.05;
  text-wrap: balance;
}

.section-summary {
  margin-bottom: 0;
  color: var(--muted);
  text-wrap: pretty;
}

.system-frame {
  container-type: inline-size;
  padding: clamp(0.5rem, 1.4vw, 1rem);
  border: 1px solid var(--line-strong);
  background: #090a0d;
  background: oklch(0.12 0.008 270);
}

.system-frame img {
  width: 100%;
  height: auto;
}

.system-mobile {
  display: none;
}

.system-caption {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 1rem;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.04em;
}

.runtime-summary {
  display: grid;
  grid-template-columns: 1.45fr 0.55fr;
  margin-top: 1.5rem;
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.runtime-band {
  padding: 1.4rem;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.runtime-band h3 {
  margin-bottom: 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.runtime-band p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 0.93rem;
}

.workflow-index {
  border-top: 1px solid var(--line-strong);
}

.workflow-row {
  display: grid;
  grid-template-columns: 4rem minmax(9rem, 0.42fr) minmax(8rem, 0.28fr) 1fr;
  gap: 1.25rem;
  align-items: center;
  min-height: 6.75rem;
  border-bottom: 1px solid var(--line);
  transition: background var(--fast);
}

.workflow-row:hover {
  background: var(--surface);
}

.workflow-number {
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 600;
}

.workflow-name {
  font-family: var(--font-display);
  font-size: 1.65rem;
  font-weight: 600;
}

.workflow-call {
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 0.78rem;
}

.workflow-description {
  margin: 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.support-layout {
  display: grid;
  grid-template-columns: 1.35fr 0.65fr;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.support-group {
  background: var(--bg);
  padding: clamp(1.5rem, 4vw, 2.5rem);
}

.support-group h3 {
  margin-bottom: 0.4rem;
  font-family: var(--font-display);
  font-size: 1.85rem;
  font-weight: 600;
}

.support-intro {
  margin-bottom: 1.75rem;
  color: var(--muted);
  font-size: 0.92rem;
}

.support-list {
  margin: 0;
}

.support-row {
  display: grid;
  grid-template-columns: minmax(8rem, 0.55fr) 1fr;
  gap: 1rem;
  padding-block: 1rem;
  border-top: 1px solid var(--line);
}

.support-row dt {
  font-weight: 700;
}

.support-row dd {
  margin: 0;
  color: var(--muted);
  font-size: 0.88rem;
}

.support-limit {
  margin-top: 1.5rem;
  padding-left: 1rem;
  border-left: 3px solid var(--accent);
  color: var(--muted);
  font-size: 0.9rem;
}

.install-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(17rem, 0.6fr);
  gap: clamp(2rem, 7vw, 6rem);
  align-items: start;
}

.install-stack {
  display: grid;
  gap: 1rem;
  min-width: 0;
}

.command-block {
  min-width: 0;
  border: 1px solid var(--line);
  background: var(--surface);
}

.command-label {
  display: block;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.66rem;
  font-weight: 600;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

pre {
  margin: 0;
  padding: 1.1rem 1rem;
  overflow-x: auto;
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 1.7;
  white-space: pre;
}

.install-note {
  min-width: 0;
  padding-top: 0.2rem;
}

.install-note h3 {
  margin-bottom: 1rem;
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 600;
  line-height: 1.15;
}

.install-note p {
  color: var(--muted);
}

.fact-list {
  margin: 1.5rem 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.fact-list li {
  padding: 0.9rem 0;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.9rem;
}

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

.evidence-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.evidence-strip a,
.evidence-strip span {
  display: flex;
  min-height: 5rem;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  text-align: center;
  text-transform: uppercase;
  transition: background var(--fast), color var(--fast);
}

.evidence-strip a:hover {
  background: var(--surface);
  color: var(--text);
}

.site-footer {
  padding-block: 3rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 2rem;
  align-items: end;
}

.footer-copy {
  max-width: 38rem;
  margin: 0.75rem 0 0;
  color: var(--muted);
  font-size: 0.88rem;
}

.footer-meta {
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.06em;
  text-align: right;
  text-transform: uppercase;
}

.hero-copy,
.signal-board {
  animation: enter var(--enter) var(--ease) both;
}

.signal-board {
  animation-delay: 100ms;
}

@keyframes enter {
  from {
    opacity: 0;
    transform: translateY(18px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@container (max-width: 760px) {
  .system-frame > img {
    display: none;
  }

  .system-mobile {
    display: grid;
    gap: 1rem;
    padding: 0.5rem;
  }

  .system-mobile-group {
    border: 1px solid var(--line);
    background: var(--surface);
  }

  .system-mobile-group h3 {
    margin: 0;
    padding: 0.75rem 0.9rem;
    border-bottom: 1px solid var(--line);
    color: var(--muted);
    font-family: var(--font-mono);
    font-size: 0.65rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
  }

  .system-mobile-group ul,
  .system-mobile-group ol {
    margin: 0;
    padding: 0;
    list-style: none;
  }

  .system-mobile-group li {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    padding: 0.78rem 0.9rem;
    border-bottom: 1px solid var(--line);
    font-size: 0.88rem;
  }

  .system-mobile-group li:last-child {
    border-bottom: 0;
  }

  .system-mobile-group small {
    color: var(--muted);
    font-family: var(--font-mono);
    text-align: right;
  }

  .system-mobile-rail {
    padding: 0.9rem;
    border-left: 5px solid var(--accent);
    background: var(--surface);
  }

  .system-mobile-rail + .system-mobile-rail {
    border-left-color: var(--text);
  }

  .system-mobile-rail strong {
    display: block;
    font-family: var(--font-display);
    font-size: 1.2rem;
  }

  .system-mobile-rail span {
    color: var(--muted);
    font-size: 0.8rem;
  }
}

@media (max-width: 960px) {
  .section-nav {
    display: none;
  }

  .locale-nav {
    margin-left: auto;
  }

  .hero {
    min-height: auto;
  }

  .hero-grid,
  .section-head,
  .install-layout {
    grid-template-columns: 1fr;
  }

  .hero-grid {
    gap: 3rem;
  }

  .section-head {
    gap: 1.5rem;
  }

  .signal-board {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
  }

  .metric {
    grid-template-columns: 4rem 1fr;
  }

  .workflow-row {
    grid-template-columns: 3rem minmax(8rem, 0.4fr) minmax(7rem, 0.25fr) 1fr;
  }

  .support-layout {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  body {
    background: var(--bg);
  }

  .nav-shell {
    gap: 0.65rem;
  }

  .brand-name,
  .github-link {
    display: none;
  }

  .locale-link {
    min-width: 44px;
  }

  .hero-grid {
    padding-block: 4.5rem;
  }

  h1 {
    font-size: clamp(3rem, 16vw, 4.8rem);
  }

  .locale-ja h1,
  .locale-zh h1 {
    font-size: clamp(2.7rem, 13vw, 4.2rem);
  }

  .signal-board {
    grid-template-columns: 1fr 1fr;
  }

  .metric {
    display: block;
    min-height: 7.25rem;
    padding: 1rem;
  }

  .metric strong {
    display: block;
    margin-bottom: 0.55rem;
  }

  .runtime-summary {
    grid-template-columns: 1fr;
  }

  .system-caption {
    display: block;
  }

  .system-caption span {
    display: block;
    margin-top: 0.35rem;
  }

  .workflow-row {
    grid-template-columns: 2.4rem 1fr;
    gap: 0.45rem 1rem;
    padding-block: 1.2rem;
  }

  .workflow-name,
  .workflow-call,
  .workflow-description {
    grid-column: 2;
  }

  .workflow-call {
    margin-top: -0.15rem;
  }

  .workflow-description {
    margin-top: 0.35rem;
  }

  .support-row {
    grid-template-columns: 1fr;
    gap: 0.35rem;
  }

  .evidence-strip {
    grid-template-columns: 1fr 1fr;
  }

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

  .footer-meta {
    text-align: left;
  }
}

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

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation: none !important;
    transition: none !important;
  }
}