:root {
  --bg:#F7F0E6;
  --bg-panel:#FFFBF5;
  --bg-panel-2:#EFE5D6;
  --border:#E2D6C3;
  --accent:#5B3CC4;
  --accent-dark:#3F2894;
  --accent-2:#6F5BE8;
  --coral:#E9967A;
  --text:#2A2119;
  --text-muted:#6E6253;
  --success:#2F8A57;
  --warn:#C98316;
  --error:#C2412E;
  --hero-top:#FBF6EE;
  --hero-bottom:#F1E7D7;
  --ink-deep:#1B1510;
  --on-dark:#FFFBF5;
  --on-dark-muted:#C8BAA5;
  --on-dark-line:rgba(226,214,195,.16);
  --iris-06:rgba(91,60,196,.06);
  --iris-08:rgba(91,60,196,.08);
  --iris-10:rgba(91,60,196,.10);
  --iris-12:rgba(91,60,196,.12);
  --iris-18:rgba(91,60,196,.18);
  --iris-28:rgba(91,60,196,.28);
  --iris-40:rgba(91,60,196,.40);
  --paper-40:rgba(255,251,245,.40);
  --paper-60:rgba(255,251,245,.60);
  --paper-88:rgba(255,251,245,.88);
  --white-30:rgba(255,255,255,.30);
  --white-55:rgba(255,255,255,.55);
  --white-85:rgba(255,255,255,.85);
  --ink-05:rgba(42,33,25,.05);
  --ink-12:rgba(42,33,25,.12);
  --grain-a:rgba(42,33,25,.03);
  --grain-b:rgba(42,33,25,.022);
  --success-16:rgba(47,138,87,.16);
  --coral-55:rgba(233,150,122,.55);
  --flag-red:#D23B3B;
  --flag-blue:#2E3A78;
  --flag-green:#2B8550;
  --flag-white:#FFFFFF;
  --mask-solid:#000000;
  --clear:transparent;
  --font-display:"Inter","Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-body:"Inter","Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:"JetBrains Mono",ui-monospace,"SFMono-Regular",Menlo,Consolas,monospace;
  --r-xs:3px;
  --r-sm:6px;
  --r-md:8px;
  --r-lg:10px;
  --r-tag:5px;
  --r-round:50%;
  --r-switch:1em;
  --gutter:56px;
  --wrap:min(1280px, calc(100% - 112px));
  --head-height:68px;
  --anchor-offset:84px;
  --toc-offset:88px;
  --section-space:96px;
  --display-size:64px;
  --heading-size:36px;
  --body-size:17px;
  --tracking-display:-.03em;
  --shadow-card:0 28px 56px -18px var(--iris-10),0 2px 8px var(--iris-06);
  --paper-texture:radial-gradient(var(--grain-a) .7px,var(--clear) 1px) 0 0/3px 3px,radial-gradient(var(--grain-b) .7px,var(--clear) 1px) 1px 2px/5px 5px;
  --ease:150ms ease;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-padding-top:var(--anchor-offset);scroll-behavior:smooth}
body{margin:0;font-family:var(--font-body);font-size:var(--body-size);line-height:1.75;color:var(--text);background:var(--paper-texture),var(--bg);-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
img{max-width:100%;height:auto}
svg{vertical-align:middle}
button,input,select,textarea{font:inherit}
button{cursor:pointer}
button,a,summary{-webkit-tap-highlight-color:var(--iris-12)}
a{color:inherit}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:var(--r-xs)}
[hidden]{display:none!important}
h1,h2,h3,h4{font-family:var(--font-display);color:var(--text);line-height:1.25;margin:0 0 24px}
h1{font-size:var(--display-size);font-weight:800;letter-spacing:var(--tracking-display)}
h2{font-size:var(--heading-size);font-weight:800;letter-spacing:-.02em;text-wrap:balance}
h3{font-size:23px;font-weight:700}
p{margin:0 0 24px}
ul,ol{padding-left:1.4em}
li+li{margin-top:6px}
.no-break{white-space:nowrap}
.wrap{width:100%;max-width:1392px;margin-inline:auto;padding-inline:var(--gutter)}
.section{padding-top:var(--section-space);padding-bottom:var(--section-space)}
.section-head{max-width:760px;margin-bottom:40px}
.section-head p,.muted{color:var(--text-muted)}
.kicker{font-family:var(--font-mono);font-size:12px;letter-spacing:.08em;color:var(--accent)}
.prose{max-width:800px;min-width:0}
.prose a:not(.btn){color:var(--accent);text-decoration:underline;text-underline-offset:4px}
.prose h2{margin-top:64px}
.prose h3{margin-top:40px}
.prose img{border-radius:var(--r-md)}
code{font-family:var(--font-mono);font-size:.88em;overflow-wrap:anywhere;color:var(--accent-dark);background:var(--bg-panel-2);border-radius:var(--r-xs);padding:2px 5px}
pre{max-width:100%;overflow-x:auto;padding:24px;background:var(--bg-panel-2);border:1px solid var(--border);border-radius:var(--r-md)}
pre code{padding:0;white-space:pre;overflow-wrap:normal}
.grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.grid>*{min-width:0}
.panel,.card{min-width:0;padding:32px;background:var(--bg-panel);border:1px solid var(--border);border-radius:var(--r-lg);box-shadow:var(--shadow-card),inset 0 1px 0 var(--white-85)}
.panel-inset{padding:24px;background:var(--bg-panel-2);border-radius:var(--r-md);box-shadow:inset 0 1px 2px var(--ink-05)}
.decorated-section{position:relative;overflow-x:clip;max-width:100%}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:10px 22px;font-family:var(--font-body);font-size:16px;line-height:1.4;font-weight:600;text-decoration:none;white-space:nowrap;flex-shrink:0;border:1px solid var(--clear);border-radius:var(--r-sm);transition:background-color var(--ease),color var(--ease),box-shadow var(--ease)}
.btn-primary{height:48px;padding:0 28px;color:var(--on-dark);background:var(--accent);box-shadow:inset 0 1px 0 var(--white-30),0 12px 24px -10px var(--iris-40)}
.btn-primary:hover,.btn-primary.is-hover{background:var(--accent-dark)}
.btn-secondary{color:var(--accent-dark);background:var(--bg-panel);border-color:var(--border);box-shadow:inset 0 1px 0 var(--white-85)}
.btn-secondary:hover{border-color:var(--accent);background:var(--iris-06)}
.btn-text{height:48px;padding:0 2px;color:var(--text);background:none}
.btn-text:hover{color:var(--accent)}
.btn:active{box-shadow:inset 0 2px 5px var(--iris-18)}
.btn:disabled,.btn[aria-disabled="true"]{color:var(--text-muted);background:var(--bg-panel-2);border-color:var(--border);box-shadow:none;cursor:not-allowed}
.btn-login{height:36px;min-height:36px;padding:0 18px;font-size:14px;color:var(--text);background:var(--bg-panel);border:1px solid var(--text);box-shadow:inset 0 1px 0 var(--white-85),0 6px 14px -8px var(--iris-28)}
.btn-login:hover{background:var(--text);color:var(--on-dark)}
.cta-row{display:flex;align-items:center;flex-wrap:wrap;gap:28px;margin:0 0 32px}
.site-head{width:var(--wrap);height:var(--head-height);margin:0 auto;display:flex;align-items:center;justify-content:space-between;flex-wrap:nowrap;gap:32px;position:relative;z-index:50}
#site-header{position:relative;z-index:50;min-height:var(--head-height)}
.brand{display:inline-flex;align-items:center;gap:10px;text-decoration:none;flex-shrink:0;min-height:30px}
.brand-mark{width:30px;height:30px;display:block;flex-shrink:0}
.brand-name{font-family:var(--font-display);font-weight:800;font-size:18px;letter-spacing:-.02em;color:var(--text);white-space:nowrap}
.primary-nav{flex:1;min-width:0}
.primary-nav ul{display:flex;align-items:center;justify-content:center;list-style:none;margin:0;padding:0}
.primary-nav li{display:flex;align-items:center;margin:0}
.primary-nav li+li::before{content:"·";color:var(--border);font-weight:700;margin:0 11px}
.primary-nav a{display:inline-flex;align-items:center;min-height:30px;font-size:14.5px;color:var(--text-muted);text-decoration:none;white-space:nowrap;transition:color var(--ease)}
.primary-nav a:hover{color:var(--text)}
.primary-nav a[aria-current="page"]{color:var(--text);font-weight:600}
.head-actions{display:flex;align-items:center;gap:14px;flex-shrink:0}
.lang-picker{position:relative}
.lang-switch{display:inline-flex;align-items:center;justify-content:center;min-width:44px;min-height:36px;width:auto;font:inherit;font-size:14px;color:var(--text-muted);background:none;border:0;padding:6px 4px;cursor:pointer;white-space:nowrap}
.lang-switch:hover{color:var(--text)}
.lang-panel{position:absolute;top:calc(100% + 8px);right:0;z-index:80;min-width:180px;padding:8px;background:var(--bg-panel);border:1px solid var(--border);border-radius:var(--r-md);box-shadow:var(--shadow-card)}
.lang-panel a{display:flex;align-items:center;min-height:44px;padding:8px 12px;text-decoration:none;color:var(--text)}
.lang-panel a:hover,.lang-panel a[aria-current="true"]{background:var(--bg-panel-2);border-radius:var(--r-sm)}
.lang-picker>summary{list-style:none}
.lang-picker>summary::-webkit-details-marker{display:none}
.menu-toggle{display:none;align-items:center;justify-content:center;flex-direction:column;gap:4px;min-width:44px;min-height:44px;padding:10px;border:1px solid var(--border);border-radius:var(--r-sm);background:var(--bg-panel);color:var(--text)}
.menu-line{display:block;width:20px;height:2px;background:currentColor}
.mobile-drawer{position:fixed;top:var(--head-height);left:0;right:0;z-index:49;height:calc(100dvh - var(--head-height));max-height:calc(100dvh - var(--head-height));overflow-y:auto;overscroll-behavior:contain;padding:20px var(--gutter) 40px;background:var(--bg-panel);border-top:1px solid var(--border)}
.mobile-links{list-style:none;margin:0;padding:0}
.mobile-drawer a{display:flex;align-items:center;width:100%;min-height:44px;padding:12px 16px;color:var(--text);text-decoration:none;border-bottom:1px solid var(--border)}
.mobile-drawer a[aria-current="page"],.mobile-drawer a[aria-current="true"]{color:var(--accent);background:var(--iris-06)}
.mobile-languages{margin-top:24px;border-top:1px solid var(--border)}
html.nav-open{overflow:hidden}
.site-footer{background:var(--bg-panel-2);border-top:1px solid var(--border);padding-top:64px;padding-bottom:28px}
.footer-grid{display:grid;grid-template-columns:1.2fr 1fr 1fr;gap:64px}
.footer-brand p{max-width:28em;margin-top:20px;color:var(--text-muted);font-size:15px}
.footer-title{font-size:14px;font-weight:700;margin:0 0 16px}
.footer-links{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px 20px}
.footer-links li{margin:0;min-width:0}
.footer-links a,.footer-languages a,.footer-legal a{display:inline-flex;align-items:center;min-height:28px;font-size:14px;text-decoration:none;color:var(--text-muted)}
.footer-links a:hover,.footer-languages a:hover,.footer-legal a:hover{color:var(--accent);text-decoration:underline;text-underline-offset:4px}
.footer-languages{display:flex;flex-wrap:wrap;gap:12px 24px;padding-top:32px;margin-top:40px;border-top:1px solid var(--border)}
.footer-bottom{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:16px;margin-top:24px;font-size:13px;color:var(--text-muted)}
.footer-bottom p{margin:0}
.footer-legal{display:flex;flex-wrap:wrap;gap:24px}
.reveal{transition:opacity .35s ease,transform .35s ease}
.reveal.pending{opacity:0;transform:translateY(16px)}
.reveal.shown{opacity:1;transform:none}
#server-status{position:relative;display:block;min-height:240px;max-width:100%;overflow:hidden;margin-top:32px;margin-bottom:32px}
#server-status>*{min-width:0;max-width:100%}
#server-status+*{margin-top:32px}
@media(min-width:1041px){
  html[lang="en"] .primary-nav a,html[lang="ja"] .primary-nav a,html[lang="ko"] .primary-nav a{font-size:12px}
  html[lang="en"] .primary-nav li+li::before,html[lang="ja"] .primary-nav li+li::before,html[lang="ko"] .primary-nav li+li::before{margin-inline:5px}
  html[lang="en"] .site-head,html[lang="ja"] .site-head,html[lang="ko"] .site-head{gap:16px}
}
@media(max-width:1180px){
  .primary-nav li+li::before{margin:0 7px}
  .primary-nav a{font-size:13.5px}
  .site-head{gap:20px}
}
@media(max-width:1040px){
  .primary-nav{display:none}
  .head-actions{margin-left:auto}
  .menu-toggle{display:inline-flex}
  :root{--display-size:52px}
}
@media(max-width:768px){
  :root{--gutter:20px;--wrap:calc(100% - 40px);--head-height:60px;--anchor-offset:76px;--section-space:64px;--display-size:40px;--heading-size:29px}
  .site-head{gap:12px}
  .head-actions{margin-left:auto;gap:8px}
  .grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .footer-brand{grid-column:1/-1}
  .panel,.card{padding:24px}
}
@media(max-width:640px){
  .no-break{white-space:normal}
  .tilt{transform:none}
  .decorated-section{max-width:100%;overflow-x:clip}
  .footer-grid{grid-template-columns:1fr}
  .footer-brand{grid-column:auto}
}
@media(max-width:400px){
  :root{--gutter:16px;--wrap:calc(100% - 32px)}
  .brand{gap:6px}
  .brand-mark{width:25px;height:25px}
  .brand-name{font-size:16px}
  .head-actions{gap:4px}
  .lang-switch{font-size:12px;padding-inline:3px}
  .btn-login{padding-inline:11px}
  .site-head{gap:6px}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation:none!important;transition:none!important}
  .reveal,.reveal.pending{opacity:1;transform:none}
}