:root {
  color-scheme: light;
  --bg: #E8EEF8;
  --bg-panel: #F7FAFE;
  --bg-panel-2: #DCE5F2;
  --border: #CAD5E6;
  --accent: #3E8F14;
  --accent-dark: #2B6A0B;
  --accent-2: #7CC243;
  --text: #141C2B;
  --text-muted: #56627A;
  --success: #18895A;
  --warn: #C27608;
  --error: #C8323E;
  --hero-top: #F2F6FC;
  --hero-bottom: #E3EAF5;
  --white: #FFFFFF;
  --ink-deep: #132440;
  --flag-red: #C8323E;
  --flag-blue: #24418C;
  --clear: transparent;
  --accent-soft: rgba(62,143,20,.10);
  --accent-tint: rgba(124,194,67,.12);
  --accent-shadow: rgba(43,106,11,.38);
  --glow-white: rgba(255,255,255,.85);
  --veil: rgba(255,255,255,.14);
  --veil-strong: rgba(255,255,255,.36);
  --line-on-dark: rgba(255,255,255,.72);
  --stripe: rgba(255,255,255,.05);
  --inset-shade: rgba(20,28,43,.10);
  --overlay: rgba(19,36,64,.35);
  --hi-inset: inset 0 1px 0 rgba(255,255,255,.95);
  --shadow-lift: 0 30px 64px -22px rgba(62,143,20,.12),0 8px 18px -10px rgba(62,143,20,.12),0 1px 2px rgba(20,28,43,.05);
  --shadow-chip: 0 12px 26px -14px rgba(62,143,20,.14),0 1px 2px rgba(20,28,43,.05);
  --shadow-nav: 0 14px 36px -22px rgba(62,143,20,.16),0 1px 2px rgba(20,28,43,.04);
  --shadow-button: inset 0 1px 0 var(--veil-strong),0 14px 28px -12px var(--accent-shadow);
  --shadow-button-hover: inset 0 1px 0 var(--veil-strong),0 18px 32px -12px var(--accent-shadow);
  --radius-s: 6px;
  --radius-nav: 8px;
  --radius-m: 10px;
  --radius: 12px;
  --radius-pill: 999px;
  --radius-circle: 50%;
  --font-display: "Inter","Noto Sans SC","Noto Sans JP","Noto Sans KR","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-body: "Inter","Noto Sans SC","Noto Sans JP","Noto Sans KR","PingFang SC","Hiragino Sans","Microsoft YaHei",system-ui,sans-serif;
  --font-mono: "JetBrains Mono","SFMono-Regular",Menlo,Consolas,"Liberation Mono",monospace;
  --gutter: 24px;
  --content-width: 1168px;
  --reading-width: 800px;
  --header-edge: 124px;
  --toc-top: 140px;
  --section-anchor: 212px;
  --ease: cubic-bezier(.2,.7,.2,1);
  --space-section: 96px;
}
*,*::before,*::after { box-sizing: border-box; }
html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-edge);
}
body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
img,svg { vertical-align: middle; }
img { max-width: 100%; height: auto; }
button,input,select,textarea { font: inherit; color: inherit; }
button,summary,a { -webkit-tap-highlight-color: var(--accent-soft); }
button { cursor: pointer; }
a { color: inherit; text-underline-offset: .2em; }
a,button,summary,[tabindex],input,select,textarea { touch-action: manipulation; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
::selection { background: var(--accent-soft); color: var(--accent-dark); }
[hidden] { display: none !important; }
h1,h2,h3,h4 {
  font-family: var(--font-display);
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: -.03em;
  text-wrap: balance;
  overflow-wrap: break-word;
}
h1 { margin: 0 0 24px; font-size: clamp(52px,4.6vw,68px); }
h2 { margin: 0 0 24px; font-size: clamp(32px,3.2vw,44px); }
h3 { margin: 0 0 16px; font-size: 24px; }
p { margin: 0 0 20px; }
ul,ol { padding-inline-start: 24px; }
code,kbd,pre { font-family: var(--font-mono); font-size: .9em; }
code { overflow-wrap: anywhere; }
pre {
  max-width: 100%;
  overflow-x: auto;
  padding: 20px;
  background: var(--bg-panel-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-m);
}
pre code { white-space: pre; overflow-wrap: normal; }
hr { border: 0; border-top: 1px solid var(--border); margin-block: 32px; }
.wrap { width: 100%; max-width: var(--content-width); margin-inline: auto; padding-inline: var(--gutter); }
.reading-wrap { width: 100%; max-width: var(--reading-width); margin-inline: auto; padding-inline: var(--gutter); }
.section { padding-top: var(--space-section); padding-bottom: var(--space-section); }
.grid { display: grid; gap: 24px; }
.grid > *, .wrap > *, .reading-wrap > * { min-width: 0; }
.grid-three { grid-template-columns: repeat(3,minmax(0,1fr)); }
.grid-two { grid-template-columns: repeat(2,minmax(0,1fr)); }
.no-break { white-space: nowrap; }
.muted { color: var(--text-muted); }
.mono { font-family: var(--font-mono); font-variant-numeric: tabular-nums; }
.kw { color: var(--accent); }
.eyebrow { margin: 0 0 16px; font-family: var(--font-mono); font-size: 13px; letter-spacing: .06em; color: var(--accent); }
.panel,.card {
  padding: 28px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-panel);
  box-shadow: var(--hi-inset),var(--shadow-lift);
  min-width: 0;
}
.panel-inset { background: var(--bg-panel-2); box-shadow: inset 0 1px 2px var(--inset-shade); }
.icon { width: 20px; height: 20px; flex-shrink: 0; fill: none; stroke: currentColor; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 52px;
  min-width: 164px;
  padding: 10px 26px;
  border: 1px solid var(--clear);
  border-radius: var(--radius-m);
  font-family: var(--font-body);
  font-size: 17px;
  font-weight: 700;
  line-height: 1.4;
  text-decoration: none;
  text-align: center;
  transition: transform .2s,box-shadow .2s,background-color .2s;
}
.btn svg { width: 16px; height: 16px; flex-shrink: 0; }
.btn-main,.btn-primary {
  color: var(--white);
  border-color: var(--accent-dark);
  background: linear-gradient(180deg,var(--accent-2) -35%,var(--accent) 45%,var(--accent-dark) 125%);
  box-shadow: var(--shadow-button);
}
.btn-main:hover,.btn-primary:hover { transform: translateY(-1px); box-shadow: var(--shadow-button-hover); }
.btn-ghost,.btn-secondary { color: var(--text); border-color: var(--border); background: var(--bg-panel); box-shadow: var(--hi-inset),var(--shadow-chip); }
.btn-ghost:hover,.btn-secondary:hover { transform: translateY(-1px); background: var(--white); }
.btn-small { min-height: 44px; min-width: 0; padding: 10px 18px; font-size: 14px; }
.btn-pill { border-radius: var(--radius-pill); }
.btn:disabled,.btn[aria-disabled="true"] { opacity: .55; cursor: not-allowed; transform: none; box-shadow: none; }
.cta-row { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; margin-bottom: 18px; }
.badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-height: 28px;
  padding: 3px 14px 3px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  background: var(--bg-panel);
  box-shadow: var(--hi-inset),var(--shadow-chip);
  font-size: 13px;
  font-weight: 600;
  line-height: 20px;
  max-width: 100%;
  overflow-wrap: anywhere;
}
.badge-dot { width: 8px; height: 8px; border-radius: var(--radius-circle); background: var(--accent); box-shadow: 0 0 0 4px var(--accent-soft); flex-shrink: 0; }
.tag { display: inline-flex; align-items: center; gap: 6px; min-height: 24px; padding: 2px 9px; border-radius: var(--radius-s); background: var(--accent-soft); color: var(--accent-dark); font-family: var(--font-mono); font-size: 12.5px; font-weight: 600; max-width: 100%; overflow-wrap: anywhere; }
.tag svg { width: 12px; height: 12px; flex-shrink: 0; }
.data-tag { max-width: 100%; overflow: hidden; white-space: nowrap; text-overflow: ellipsis; }
.reveal { transition: opacity .55s var(--ease),transform .55s var(--ease); }
.reveal.pending { opacity: 0; transform: translateY(16px); }
.reveal.shown { opacity: 1; transform: none; }
#server-status { position: relative; display: block; min-width: 0; width: 100%; max-width: 100%; overflow: hidden; margin-block: 24px; }
#server-status > * { min-width: 0; max-width: 100%; }
#server-status + * { margin-top: 24px; }

/* Shared header */
#site-header { position: sticky; top: 0; z-index: 100; }
.announce { position: relative; min-height: 40px; display: flex; align-items: center; justify-content: center; gap: 14px; padding: 0 20px; color: var(--white); font-size: 14px; line-height: 20px; background: linear-gradient(90deg,var(--ink-deep) 0%,var(--ink-deep) 32%,var(--accent-dark) 84%,var(--accent) 100%); }
.announce::before { content: ""; position: absolute; inset: 0; background: repeating-linear-gradient(135deg,var(--stripe) 0 1px,var(--clear) 1px 14px); pointer-events: none; }
.announce > * { position: relative; }
.announce-lead { font-weight: 800; letter-spacing: .01em; }
.announce-text { opacity: .92; }
.announce-btn { display: inline-flex; align-items: center; justify-content: center; gap: 6px; min-height: 26px; padding: 2px 12px; border: 1px solid var(--line-on-dark); border-radius: var(--radius-pill); font-size: 13px; font-weight: 700; text-decoration: none; color: var(--white); transition: background-color .2s; flex-shrink: 0; }
.announce-btn:hover { background: var(--veil); }
.nav-shell { position: relative; z-index: 110; padding: 12px 32px 0; }
.nav { max-width: 1376px; height: 60px; margin: 0 auto; display: flex; align-items: center; flex-wrap: nowrap; gap: 20px; padding: 0 11px 0 16px; background: var(--bg-panel); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--hi-inset),var(--shadow-nav); }
.brand { display: inline-flex; align-items: center; gap: 10px; min-height: 30px; text-decoration: none; color: var(--text); font-family: var(--font-display); font-weight: 900; font-size: 19px; letter-spacing: -.02em; flex-shrink: 0; }
.brand img { width: 30px; height: 30px; flex-shrink: 0; }
.menu { display: flex; align-items: center; list-style: none; margin: 0; padding: 0; gap: 2px; flex: 1; min-width: 0; }
.menu-link,.more-btn { position: relative; display: flex; align-items: center; justify-content: center; gap: 5px; min-height: 38px; padding: 0 12px; border: 0; border-radius: var(--radius-nav); background: var(--clear); font-family: inherit; font-size: 15px; font-weight: 600; color: var(--text-muted); text-decoration: none; cursor: pointer; white-space: nowrap; transition: background-color .2s,color .2s; }
.menu-link:hover,.more-btn:hover,.more.is-open .more-btn { color: var(--text); background: var(--bg-panel-2); }
.menu-link[aria-current="page"],.more-btn.is-current { color: var(--text); }
.menu-link[aria-current="page"]::after,.more-btn.is-current::after { content: ""; position: absolute; left: 12px; right: 12px; bottom: 4px; height: 2px; border-radius: var(--radius-s); background: var(--accent); }
.more { position: relative; }
.more-btn svg { width: 12px; height: 12px; transition: transform .2s; }
.more.is-open .more-btn svg { transform: rotate(180deg); }
.dropdown { position: absolute; z-index: 120; top: calc(100% + 10px); left: -8px; width: 288px; max-width: calc(100vw - 32px); padding: 8px; background: var(--bg-panel); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--hi-inset),var(--shadow-lift); display: none; }
.more.is-open .dropdown { display: block; }
.dd-label { display: block; padding: 8px 10px 4px; font-family: var(--font-mono); font-size: 11px; letter-spacing: .08em; color: var(--accent-dark); }
.dd-link { display: block; min-height: 44px; padding: 8px 10px; border-radius: var(--radius-nav); text-decoration: none; transition: background-color .2s; }
.dd-link:hover,.dd-link[aria-current="page"] { background: var(--bg-panel-2); }
.dd-link b { display: block; font-size: 14px; font-weight: 700; color: var(--text); }
.dd-link span { display: block; margin-top: 2px; font-size: 12px; line-height: 18px; color: var(--text-muted); }
.nav-right { margin-left: auto; display: flex; align-items: center; gap: 8px; flex-shrink: 0; }
.lang-picker { position: relative; }
.lang { display: flex; align-items: center; justify-content: center; gap: 6px; min-width: 44px; width: auto; height: 38px; padding: 0 12px; border: 0; border-radius: var(--radius-nav); background: var(--clear); font-family: inherit; font-size: 14px; font-weight: 600; color: var(--text-muted); cursor: pointer; list-style: none; }
.lang span { white-space: nowrap; }
.lang::-webkit-details-marker { display: none; }
.lang:hover { background: var(--bg-panel-2); color: var(--text); }
.lang svg { width: 16px; height: 16px; flex-shrink: 0; }
.language-panel { display: none; position: absolute; top: calc(100% + 12px); right: 0; z-index: 125; width: 188px; max-width: calc(100vw - 32px); padding: 8px; border: 1px solid var(--border); border-radius: var(--radius); background: var(--bg-panel); box-shadow: var(--shadow-lift),var(--hi-inset); }
.lang-picker.is-open .language-panel,.lang-picker[open] .language-panel { display: block; }
.language-panel a { display: flex; align-items: center; min-height: 44px; padding: 8px 12px; text-decoration: none; border-radius: var(--radius-s); }
.language-panel a:hover,.language-panel a[aria-current="true"] { background: var(--accent-soft); color: var(--accent-dark); }
.nav-vr { width: 1px; height: 20px; background: var(--border); flex-shrink: 0; }
.login { display: inline-flex; align-items: center; justify-content: center; min-height: 38px; padding: 0 18px; border-radius: var(--radius-nav); background: var(--text); color: var(--white); font-size: 14px; font-weight: 700; text-decoration: none; box-shadow: inset 0 1px 0 var(--veil); transition: transform .2s; white-space: nowrap; }
.login:hover { transform: translateY(-1px); }
.menu-toggle { display: none; align-items: center; justify-content: center; min-width: 44px; min-height: 44px; padding: 10px; border: 0; border-radius: var(--radius-nav); background: var(--clear); color: var(--text); }
.menu-toggle svg { width: 22px; height: 22px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; }
.menu-toggle:hover { background: var(--bg-panel-2); }
.mobile-drawer { display: none; position: fixed; top: var(--header-edge); left: 12px; right: 12px; height: calc(100dvh - var(--header-edge) - 12px); max-height: calc(100dvh - var(--header-edge) - 12px); overflow-y: auto; overscroll-behavior: contain; z-index: 105; padding: 16px; border: 1px solid var(--border); border-radius: var(--radius); background: var(--bg-panel); box-shadow: var(--shadow-lift); }
.mobile-drawer a { display: flex; align-items: center; width: 100%; min-height: 46px; padding: 10px 14px; border-radius: var(--radius-s); text-decoration: none; }
.mobile-drawer a:hover,.mobile-drawer a[aria-current] { background: var(--accent-soft); color: var(--accent-dark); }
.drawer-label { display: block; margin-top: 16px; padding: 10px 14px; font-family: var(--font-mono); font-size: 12px; color: var(--text-muted); border-top: 1px solid var(--border); }
.nav-veil { display: none; position: fixed; inset: var(--header-edge) 0 0; z-index: 101; border: 0; background: var(--overlay); width: 100%; cursor: default; }
html.nav-open { overflow: hidden; }

/* Shared footer */
.site-footer { padding-top: 64px; padding-bottom: 28px; background: var(--bg-panel-2); border-top: 1px solid var(--border); box-shadow: var(--hi-inset); }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 40px; }
.footer-grid > * { min-width: 0; }
.footer-brand p { max-width: 360px; color: var(--text-muted); font-size: 14px; margin-top: 20px; }
.footer-title { margin: 0 0 16px; font-family: var(--font-mono); font-size: 13px; font-weight: 600; color: var(--accent-dark); letter-spacing: .04em; }
.footer-links { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 6px 16px; list-style: none; padding: 0; margin: 0; }
.footer-links a,.footer-languages a,.footer-legal a { display: inline-flex; align-items: center; min-height: 28px; text-decoration: none; font-size: 14px; }
.footer-links a:hover,.footer-languages a:hover,.footer-legal a:hover { color: var(--accent-dark); text-decoration: underline; }
.footer-languages { display: flex; flex-wrap: wrap; gap: 12px 24px; padding-block: 28px; margin-top: 24px; border-bottom: 1px solid var(--border); }
.footer-languages a[aria-current="true"] { color: var(--accent-dark); font-weight: 700; }
.footer-bottom { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 16px; padding-top: 24px; color: var(--text-muted); font-size: 13px; }
.footer-bottom p { margin: 0; }
.footer-legal { display: flex; flex-wrap: wrap; gap: 20px; }
@media (max-width: 1200px) {
  .nav { gap: 12px; }
  .menu-link,.more-btn { padding-inline: 9px; font-size: 14px; }
}
@media (max-width: 1080px) {
  .menu { display: none; }
  .menu-toggle { display: inline-flex; }
  .nav-right { margin-left: auto; }
  .mobile-drawer.is-open,.nav-veil.is-open { display: block; }
}
@media (max-width: 768px) {
  :root { --gutter: 20px; --space-section: 72px; --header-edge: 132px; --toc-top: 144px; --section-anchor: 208px; }
  h1 { font-size: clamp(28px,7.8vw,40px); }
  h2 { font-size: 32px; }
  h3 { font-size: 22px; }
  .grid-three,.grid-two,.footer-grid { grid-template-columns: minmax(0,1fr); }
  .announce { flex-wrap: wrap; gap: 6px 10px; padding: 8px 14px; font-size: 12px; }
  .nav-shell { padding: 8px 12px 0; }
  .nav { gap: 10px; }
  .nav-vr { display: none; }
  .footer-grid { gap: 28px; }
}
@media (max-width: 640px) {
  :root { --gutter: 16px; }
  .no-break { white-space: normal; }
  .tilt,.decor-tilt { transform: none; }
  .panel,.card { padding: 20px; }
  .nav { padding-inline: 10px 6px; gap: 6px; }
  .nav-right { margin-left: auto; gap: 2px; }
  .brand { font-size: 17px; gap: 7px; }
  .brand img { width: 27px; height: 27px; }
  .login { padding-inline: 12px; font-size: 13px; }
  .lang { padding-inline: 8px; }
}
@media (max-width: 420px) {
  .lang span { display: none; }
  .btn { min-width: 140px; padding-inline: 18px; font-size: 16px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,*::before,*::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  .reveal,.reveal.pending { opacity: 1; transform: none; }
  .btn:hover,.login:hover { transform: none; }
}