:root{
  --bg:#F7F0E2;
  --bg-hero-top:#FBF6EC;
  --bg-hero-bottom:#F2E8D5;
  --panel:#FFFCF5;
  --panel-2:#EFE5D2;
  --border:#E2D6BF;
  --accent:#B0951A;
  --accent-2:#D9BC4A;
  --accent-dark:#6F5C0A;
  --text:#2A2116;
  --text-muted:#6E6150;
  --success:#3F7D3A;
  --warn:#C2781A;
  --error:#B73A2E;
  --white:#FFFFFF;
  --flag-red:#C8372D;
  --flag-navy:#22305A;
  --flag-white:#FFFFFF;
  --clear:transparent;
  --font-display:"Inter","Noto Sans SC","Noto Sans JP","Noto Sans KR","PingFang SC","Hiragino Sans","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",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --r-xs:6px;
  --r-sm:8px;
  --r-md:10px;
  --r-lg:12px;
  --r-xl:20px;
  --r-pill:999px;
  --r-round:50%;
  --gutter:40px;
  --wrap-max:1360px;
  --head-height:72px;
  --anchor-offset:88px;
  --toc-offset:88px;
  --toc-landing:164px;
  --space-1:8px;
  --space-2:16px;
  --space-3:24px;
  --space-4:32px;
  --space-6:48px;
  --space-8:64px;
  --space-12:96px;
  --body-size:17px;
  --body-leading:1.75;
  --display-weight:900;
  --display-tracking:-.03em;
  --heading-tracking:-.02em;
  --motion-fast:.15s;
  --motion-reveal:.35s;
  --paper-opacity:.03;
  --paper-grain:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='g'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23g)'/%3E%3C/svg%3E");
  --hairline:color-mix(in srgb,var(--border) 72%,transparent);
  --highlight:inset 0 1px 0 var(--white);
  --shadow-card:0 2px 6px -2px color-mix(in srgb,var(--accent-dark) 10%,transparent),0 16px 40px -10px color-mix(in srgb,var(--accent) 12%,transparent);
  --shadow-lift:0 6px 14px -4px color-mix(in srgb,var(--accent-dark) 16%,transparent),0 26px 52px -12px color-mix(in srgb,var(--accent) 24%,transparent);
  --shadow-window:0 14px 28px -14px color-mix(in srgb,var(--accent-dark) 22%,transparent),0 40px 80px -10px color-mix(in srgb,var(--accent) 12%,transparent);
  --button-gradient:linear-gradient(180deg,color-mix(in srgb,var(--accent-2) 55%,var(--accent)),var(--accent));
  --chrome-gradient:linear-gradient(100deg,var(--accent),var(--accent-2));
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%;scroll-padding-top:var(--anchor-offset);scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font-family:var(--font-body);font-size:var(--body-size);line-height:var(--body-leading);-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
body::before{content:"";position:fixed;inset:0;z-index:60;pointer-events:none;background:var(--text);opacity:var(--paper-opacity);-webkit-mask-image:var(--paper-grain);mask-image:var(--paper-grain);-webkit-mask-size:180px 180px;mask-size:180px 180px}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer}
button,a,input,select,textarea,summary{-webkit-tap-highlight-color:var(--clear)}
button{border:0}
button:disabled{cursor:not-allowed}
:focus-visible{outline:2px solid var(--accent-dark);outline-offset:3px;border-radius:var(--r-xs)}
[hidden]{display:none!important}
img{display:block;max-width:100%;height:auto}
svg{flex-shrink:0;vertical-align:middle}
p{margin:0 0 var(--space-3)}
h1,h2,h3,h4{font-family:var(--font-display);color:var(--text);overflow-wrap:break-word}
h1{font-size:clamp(52px,4.6vw,66px);font-weight:var(--display-weight);line-height:1.12;letter-spacing:var(--display-tracking);margin:0 0 var(--space-3)}
h2{font-size:clamp(28px,3vw,40px);font-weight:var(--display-weight);line-height:1.2;letter-spacing:var(--heading-tracking);margin:0 0 var(--space-3)}
h3{font-size:22px;line-height:1.4;letter-spacing:var(--heading-tracking);margin:0 0 var(--space-2)}
h4{font-size:18px;line-height:1.5;margin:0 0 var(--space-1)}
ul,ol{padding-left:1.5em}
li+li{margin-top:var(--space-1)}
code,kbd,pre{font-family:var(--font-mono)}
code{font-size:.88em;overflow-wrap:anywhere;word-break:break-word;background:var(--panel-2);padding:2px 5px;border-radius:var(--r-xs)}
pre{max-width:100%;overflow-x:auto;background:var(--panel-2);border:1px solid var(--border);border-radius:var(--r-sm);padding:var(--space-3);font-size:14px}
pre code{padding:0;background:var(--clear);overflow-wrap:normal;word-break:normal;white-space:pre}
hr{border:0;border-top:1px solid var(--border);margin-block:var(--space-4)}
::selection{background:var(--panel-2);color:var(--text)}
.wrap{width:100%;max-width:var(--wrap-max);margin-inline:auto;padding-inline:var(--gutter)}
.section{padding-top:var(--space-12);padding-bottom:var(--space-12)}
.section-tight{padding-top:var(--space-6);padding-bottom:var(--space-6)}
.section-head{max-width:760px;margin-bottom:var(--space-6)}
.section-head p,.muted{color:var(--text-muted)}
.no-break{white-space:nowrap}
.line{display:block}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap;border:0}
.icon{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.grid-2,.grid-3,.grid-5{display:grid;gap:var(--space-3)}
.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid-5{grid-template-columns:repeat(5,minmax(0,1fr))}
.grid-2>*,.grid-3>*,.grid-5>*,.hero-grid>*,.footer-grid>*{min-width:0}
.panel,.card{background:var(--panel);border:1px solid var(--border);border-radius:var(--r-lg);box-shadow:var(--highlight),var(--shadow-card);padding:var(--space-4)}
.panel-recess{background:var(--panel-2);border-radius:var(--r-lg);padding:var(--space-3)}
.prose{max-width:850px;min-width:0}
.prose p,.prose li{overflow-wrap:break-word}
.prose a{color:var(--accent-dark);text-decoration:underline;text-underline-offset:4px}
.prose h2{margin-top:var(--space-8)}
.prose h3{margin-top:var(--space-4)}
.prose section{min-width:0}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-family:var(--font-mono);font-size:12px;letter-spacing:.1em;color:var(--accent-dark)}
.eyebrow::before{content:"";width:16px;height:1.5px;background:var(--accent-dark);flex-shrink:0}
.cta-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:32px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:52px;padding:12px 26px;border:1.5px solid var(--clear);border-radius:var(--r-sm);font-family:var(--font-body);font-size:16px;font-weight:700;letter-spacing:.01em;line-height:1.5;white-space:nowrap;flex-shrink:0;transition:transform var(--motion-fast) ease,box-shadow var(--motion-fast) ease}
.btn svg{width:18px;height:18px}
.btn-primary{color:var(--text);background:var(--button-gradient);box-shadow:inset 0 1px 0 color-mix(in srgb,var(--white) 42%,transparent),inset 0 -1px 0 color-mix(in srgb,var(--accent-dark) 30%,transparent),0 14px 26px -12px color-mix(in srgb,var(--accent) 72%,transparent)}
.btn-ghost,.btn-secondary{color:var(--text);background:var(--panel);border:1.5px solid var(--text);box-shadow:var(--highlight)}
.btn-text{color:var(--accent-dark);background:var(--clear);padding-inline:12px}
.btn-small{min-height:40px;padding:8px 16px;font-size:14px}
.btn:hover:not(:disabled):not([aria-disabled="true"]){transform:translateY(-1px)}
.btn:active:not(:disabled){transform:translateY(0)}
.btn:disabled,.btn[aria-disabled="true"]{opacity:.55;box-shadow:none;cursor:not-allowed}
.text-link{display:inline-flex;align-items:center;gap:8px;min-height:24px;color:var(--accent-dark);text-decoration:underline;text-underline-offset:4px}
#site-header{position:relative;z-index:40;min-height:var(--head-height)}
.site-head{position:relative;z-index:43;border-bottom:1px solid var(--hairline)}
.head-row{display:flex;align-items:center;flex-wrap:nowrap;gap:32px;height:var(--head-height)}
.brand{display:inline-flex;align-items:center;gap:10px;font-family:var(--font-display);font-weight:800;font-size:20px;letter-spacing:-.02em;color:var(--text);white-space:nowrap;flex-shrink:0;min-height:32px}
.brand-mark{display:block;width:32px;height:32px;filter:drop-shadow(0 4px 8px color-mix(in srgb,var(--accent) 30%,transparent))}
.brand-word{white-space:nowrap}
.iy{color:var(--accent-dark)}
.main-nav{flex:1;min-width:0}
.main-nav ul{display:flex;align-items:center;list-style:none;margin:0;padding:0;gap:2px}
.main-nav li{margin:0}
.main-nav a{display:inline-flex;align-items:center;gap:6px;height:36px;padding:0 11px;border-radius:var(--r-sm);font-size:14.5px;font-weight:500;color:var(--text-muted);white-space:nowrap;transition:background-color var(--motion-fast) ease,color var(--motion-fast) ease}
.main-nav a svg{width:16px;height:16px}
.main-nav a:hover{color:var(--text);background:color-mix(in srgb,var(--panel-2) 70%,transparent)}
.main-nav a[aria-current="page"]{color:var(--text);font-weight:600;background:color-mix(in srgb,var(--accent) 11%,transparent)}
.head-tools{display:flex;align-items:center;gap:12px;margin-left:auto;flex-shrink:0}
.lang-wrap{position:relative}
.lang{display:inline-flex;align-items:center;justify-content:center;gap:6px;min-width:44px;width:auto;height:38px;padding:0 10px;border:0;border-radius:var(--r-sm);background:var(--clear);font-size:14px;color:var(--text-muted);white-space:nowrap}
.lang span{white-space:nowrap}
.lang svg{width:16px;height:16px}
.lang:hover{background:var(--panel-2);color:var(--text)}
.lang-panel{position:absolute;right:0;top:calc(100% + 8px);z-index:48;width:184px;padding:8px;background:var(--panel);border:1px solid var(--border);border-radius:var(--r-md);box-shadow:var(--highlight),var(--shadow-lift)}
.lang-panel a{display:flex;align-items:center;min-height:44px;padding:8px 12px;border-radius:var(--r-xs);font-size:14px;white-space:nowrap}
.lang-panel a:hover,.lang-panel a[aria-current="true"]{background:var(--panel-2);color:var(--accent-dark)}
.login-btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:38px;padding:7px 16px;border-radius:var(--r-sm);border:1.5px solid var(--text);background:var(--panel);font-size:14px;font-weight:700;line-height:1.5;color:var(--text);white-space:nowrap;box-shadow:var(--highlight),0 6px 14px -10px color-mix(in srgb,var(--accent-dark) 45%,transparent);transition:transform var(--motion-fast) ease}
.login-btn svg{width:16px;height:16px}
.login-btn:hover{transform:translateY(-1px)}
.menu-toggle{display:none;align-items:center;justify-content:center;min-width:44px;min-height:44px;border:1px solid var(--border);border-radius:var(--r-sm);background:var(--panel);color:var(--text)}
.menu-toggle svg{width:20px;height:20px}
.mobile-drawer{position:fixed;z-index:42;top:var(--head-height);inset-inline:0;height:calc(100dvh - var(--head-height));max-height:calc(100dvh - var(--head-height));overflow-y:auto;overscroll-behavior:contain;padding:16px var(--gutter) 32px;background:var(--panel);border-top:1px solid var(--border)}
.mobile-drawer ul{list-style:none;margin:0;padding:0}
.mobile-drawer li{margin:0}
.mobile-drawer a{display:flex;align-items:center;gap:12px;width:100%;min-height:48px;padding:12px 16px;border-radius:var(--r-sm);font-size:16px}
.mobile-drawer a:hover,.mobile-drawer a[aria-current="page"],.mobile-drawer a[aria-current="true"]{background:var(--panel-2);color:var(--accent-dark)}
.mobile-drawer svg{width:20px;height:20px}
.drawer-languages{border-top:1px solid var(--border);margin-top:16px;padding-top:16px}
.nav-veil{position:fixed;z-index:41;top:var(--head-height);inset-inline:0;bottom:0;background:color-mix(in srgb,var(--text) 24%,transparent)}
html.nav-open{overflow:hidden}
.site-footer{padding-top:64px;padding-bottom:32px;border-top:1px solid var(--border);background:var(--panel-2)}
.footer-grid{display:grid;grid-template-columns:1.25fr 1fr 1fr;gap:48px}
.footer-brand p{font-size:15px;color:var(--text-muted);max-width:30em;margin:16px 0}
.footer-title{font-size:14px;font-weight:800;margin:0 0 16px}
.footer-links{display:flex;flex-wrap:wrap;gap:4px 20px}
.footer-links a{display:inline-flex;align-items:center;min-height:32px;font-size:14px}
.footer-links a:hover{color:var(--accent-dark);text-decoration:underline;text-underline-offset:4px}
.footer-languages{display:flex;flex-wrap:wrap;gap:8px 24px;margin-top:32px;padding-top:24px;border-top:1px solid var(--border)}
.footer-languages a{display:inline-flex;align-items:center;min-height:32px;font-size:14px}
.footer-languages a[aria-current="true"]{font-weight:700;color:var(--accent-dark)}
.footer-bottom{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-top:24px;padding-top:24px;border-top:1px solid var(--border);font-size:13px;color:var(--text-muted)}
.footer-bottom p{margin:0}
.footer-legal{display:flex;flex-wrap:wrap;gap:16px}
.footer-legal a{display:inline-flex;align-items:center;min-height:32px}
.reveal{transition:opacity var(--motion-reveal) ease,transform var(--motion-reveal) 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:32px}
.hero-shell,.decorated-section{position:relative;overflow-x:clip;max-width:100%}
.hero-shell{background:radial-gradient(52% 58% at 76% 52%,color-mix(in srgb,var(--accent) 7%,transparent) 0%,transparent 72%),linear-gradient(180deg,var(--bg-hero-top),var(--bg-hero-bottom))}
@media(min-width:1181px) and (max-width:1300px){
  .head-row{gap:20px}
  .main-nav a{padding-inline:8px;font-size:14px}
  .head-tools{gap:8px}
}
@media(max-width:1180px){
  .main-nav{display:none}
  .menu-toggle{display:inline-flex}
  .head-tools{margin-left:auto}
  .head-row{gap:16px}
  .grid-5{grid-template-columns:repeat(3,minmax(0,1fr))}
}
@media(min-width:1181px){
  .mobile-drawer,.nav-veil{display:none!important}
  html.nav-open{overflow:auto}
}
@media(max-width:768px){
  :root{--gutter:24px}
  h1{font-size:clamp(28px,7vw,40px)}
  h2{font-size:30px}
  .section{padding-top:64px;padding-bottom:64px}
  .grid-3{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .footer-brand{grid-column:1/-1}
  .head-tools{margin-left:auto;gap:8px}
}
@media(max-width:640px){
  :root{--gutter:16px;--head-height:64px;--anchor-offset:80px;--toc-offset:16px;--toc-landing:96px}
  .no-break{white-space:normal}
  .tilt,.rk-window,.rk-drag,.rk-badge{transform:none}
  .decorated-section{max-width:100%;overflow-x:clip}
  .grid-2,.grid-5{grid-template-columns:1fr}
  .head-row{gap:8px}
  .brand{gap:6px;font-size:18px}
  .brand-mark{width:28px;height:28px}
  .head-tools{gap:4px;margin-left:auto}
  .lang{padding-inline:6px;font-size:12px}
  .lang svg{display:none}
  .login-btn{min-height:36px;padding:6px 10px;font-size:13px;gap:5px}
  .login-btn svg{display:none}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{align-items:flex-start;flex-direction:column}
  .panel,.card{padding:24px}
  .btn{padding-inline:20px}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{transition-duration:0s!important;animation-duration:0s!important;animation-iteration-count:1!important}
  .reveal,.reveal.pending{opacity:1;transform:none}
}