:root{
  --bg:#F7F6F3;
  --bg-panel:#FFFFFF;
  --bg-panel-2:#EFEDE8;
  --border:#E2DED6;
  --accent:#128A6B;
  --accent-dark:#0B5E49;
  --accent-soft:#5FB89C;
  --text:#1E1C19;
  --text-muted:#6B665E;
  --success:#2F9E62;
  --warn:#C98A12;
  --error:#C4402F;
  --oak-hi:#F2EADD;
  --oak:#E5D8C3;
  --oak-back:#DACBB3;
  --oak-deep:#CFBC9F;
  --oak-shade:#B7A183;
  --flag-red:#C8323C;
  --flag-white:#FFFFFF;
  --flag-navy:#26396C;
  --flag-black:#2A2623;
  --flag-gold:#E1B13C;
  --font-display:"Iowan Old Style","Palatino Linotype",Georgia,"Songti SC","STSong","Noto Serif CJK SC","SimSun",serif;
  --font-body:"Inter","Noto Sans SC","Noto Sans JP","Noto Sans KR",-apple-system,"PingFang SC","Hiragino Sans","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:"JetBrains Mono",ui-monospace,"SFMono-Regular",Menlo,Consolas,monospace;
  --r-xs:4px;
  --r-sm:8px;
  --r-md:10px;
  --r-pill:999px;
  --r-circle:50%;
  --nav-h:64px;
  --gutter:32px;
  --content-w:1200px;
  --reading-w:800px;
  --section-space:88px;
  --toc-height:64px;
  --anchor-offset:144px;
  --edge-hi:inset 0 1px 0 color-mix(in srgb,var(--bg-panel) 90%,transparent);
  --lift:0 22px 44px -20px color-mix(in srgb,var(--accent) 12%,transparent),0 3px 8px -4px color-mix(in srgb,var(--text) 10%,transparent);
  --lift-strong:0 30px 54px -22px color-mix(in srgb,var(--accent) 14%,transparent),0 6px 14px -8px color-mix(in srgb,var(--text) 16%,transparent);
  --focus:2px solid var(--accent-dark);
  --ease:cubic-bezier(.2,.7,.2,1);
  --fast:.2s;
  --reveal-time:.35s;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:calc(var(--nav-h) + 16px)}
body{margin:0;background:var(--bg);color:var(--text);font-family:var(--font-body);font-size:16px;line-height:1.65;-webkit-font-smoothing:antialiased}
button,input,select,textarea{font:inherit;color:inherit}
button,a,summary{-webkit-tap-highlight-color:transparent}
button{cursor:pointer}
a{color:inherit;text-underline-offset:.2em}
img{display:block;max-width:100%;height:auto}
svg{flex-shrink:0;vertical-align:middle}
button svg,a svg{flex-shrink:0}
[hidden]{display:none!important}
:where(a,button,input,select,textarea,summary,[tabindex]):focus-visible{outline:var(--focus);outline-offset:3px}
h1,h2,h3,h4,p,ul,ol,blockquote,figure{margin-top:0}
h1,h2,h3{font-family:var(--font-display);text-wrap:balance;overflow-wrap:break-word}
h1{font-size:clamp(52px,5vw,72px);font-weight:400;line-height:1.2;letter-spacing:-.015em;margin-bottom:24px}
h2{font-size:clamp(30px,3vw,44px);font-weight:400;line-height:1.3;margin-bottom:24px}
h3{font-size:26px;line-height:1.35;margin-bottom:16px}
p{margin-bottom:20px}
li+li{margin-top:6px}
code{font-family:var(--font-mono);font-size:.88em;overflow-wrap:anywhere}
pre{max-width:100%;overflow-x:auto;background:var(--bg-panel-2);border:1px solid var(--border);border-radius:var(--r-sm);padding:20px;line-height:1.65}
pre code{overflow-wrap:normal;white-space:pre}
hr{border:0;border-top:1px solid var(--border);margin:32px 0}
.wrap{width:100%;max-width:var(--content-w);margin-inline:auto;padding-inline:var(--gutter)}
.reading-wrap{width:100%;max-width:var(--reading-w);margin-inline:auto;padding-inline:var(--gutter)}
.sec{padding-top:var(--section-space);padding-bottom:var(--section-space)}
:where(.grid,.card-grid,.footer-grid)>*{min-width:0}
.grid{display:grid;gap:24px;grid-template-columns:repeat(3,minmax(0,1fr))}
.panel,.card{min-width:0;border:1px solid var(--border);border-radius:var(--r-md);background:var(--bg-panel);box-shadow:var(--lift),var(--edge-hi);padding:28px}
.panel-sunken{background:var(--bg-panel-2);border-radius:var(--r-sm);padding:24px}
.muted{color:var(--text-muted)}
.num{font-family:var(--font-mono);font-weight:500;font-variant-numeric:tabular-nums;letter-spacing:-.01em}
.no-break{white-space:nowrap}
.sr{position:absolute;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}
.sprite{position:absolute;width:0;height:0;overflow:hidden}
.accent-period{color:var(--accent)}
.kicker{font-size:12px;font-weight:600;letter-spacing:.16em;text-transform:uppercase;color:var(--text-muted)}
.lead{font-size:20px;line-height:1.65;color:var(--text-muted)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:48px;padding:12px 26px;border:1.5px solid transparent;border-radius:var(--r-sm);font-family:var(--font-body);font-size:16px;font-weight:600;line-height:1.4;text-decoration:none;white-space:nowrap;flex-shrink:0;transition:background var(--fast),box-shadow var(--fast),transform var(--fast)}
.btn-primary{background:var(--accent);color:var(--bg-panel);box-shadow:var(--edge-hi),var(--lift)}
.btn-primary:hover,.btn-primary.is-hover{background:linear-gradient(110deg,var(--accent-dark),var(--accent));box-shadow:var(--lift-strong)}
.btn-secondary{background:var(--bg-panel);color:var(--accent);border-color:var(--accent)}
.btn-secondary:hover,.btn-secondary.is-hover{background:color-mix(in srgb,var(--accent) 7%,var(--bg-panel))}
.btn:active,.btn.is-active{transform:translateY(1px)}
.btn:disabled,.btn[aria-disabled="true"]{opacity:.5;cursor:not-allowed;box-shadow:none}
.btn-small{min-height:40px;padding:8px 18px;font-size:14px}
.actions{display:flex;align-items:center;justify-content:center;flex-wrap:wrap;gap:14px}
.badge,.tag{display:inline-flex;align-items:center;gap:6px;max-width:100%;padding:4px 10px;border:1px solid var(--border);border-radius:var(--r-pill);background:var(--bg-panel-2);color:var(--text);font-size:12px;line-height:1.5;overflow-wrap:anywhere}
.tag{border-radius:var(--r-xs)}
.icon-line{fill:none;stroke:currentColor;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}
#site-header{position:relative;z-index:70}
.topbar{position:relative;z-index:40;height:var(--nav-h);background:var(--bg-panel);border-bottom:1px solid var(--border);box-shadow:0 10px 30px -24px color-mix(in srgb,var(--accent) 14%,transparent)}
.topbar-inner{max-width:1360px;height:100%;margin:0 auto;padding:0 32px;display:flex;align-items:center;gap:24px;flex-wrap:nowrap}
.brand{display:inline-flex;align-items:center;gap:10px;text-decoration:none;color:var(--text);font-weight:700;font-size:19px;letter-spacing:-.01em;flex:none;white-space:nowrap}
.brand img{width:32px;height:32px;flex-shrink:0}
.desktop-nav{flex:1;min-width:0}
.menu{list-style:none;margin:0;padding:0;display:flex;align-items:center;gap:2px}
.menu li{margin:0}
.menu a{display:block;padding:8px 14px;border-radius:var(--r-pill);font-size:14.5px;color:var(--text-muted);text-decoration:none;white-space:nowrap;transition:color var(--fast),background-color var(--fast)}
.menu a:hover{color:var(--text);background:color-mix(in srgb,var(--bg-panel-2) 60%,transparent)}
.menu a[aria-current="page"]{color:var(--text);font-weight:600;background:var(--bg-panel-2);box-shadow:inset 0 0 0 1px var(--border)}
.tools{display:flex;align-items:center;gap:16px;flex-shrink:0}
.lang{position:relative;flex-shrink:0}
.lang-button{display:inline-flex;align-items:center;justify-content:center;gap:6px;min-height:36px;width:auto;padding:4px 0;border:0;background:transparent;font-size:14px;color:var(--text-muted);white-space:nowrap}
.lang-button span{white-space:nowrap}
.lang-button svg{width:16px;height:16px}
.lang-panel{position:absolute;right:0;top:calc(100% + 12px);z-index:65;min-width:180px;padding:8px;background:var(--bg-panel);border:1px solid var(--border);border-radius:var(--r-sm);box-shadow:var(--lift-strong)}
.lang-panel a{display:flex;align-items:center;width:100%;min-height:44px;padding:8px 12px;text-decoration:none;border-radius:var(--r-xs);font-size:14px}
.lang-panel a:hover,.lang-panel a[aria-current]{background:var(--bg-panel-2)}
.login{display:inline-flex;align-items:center;justify-content:center;min-height:36px;padding:6px 18px;border-radius:var(--r-sm);border:1.5px solid var(--accent);background:var(--bg-panel);color:var(--accent);font-size:14px;font-weight:600;text-decoration:none;white-space:nowrap}
.login:hover{background:color-mix(in srgb,var(--accent) 7%,var(--bg-panel))}
.burger{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)}
.burger-line{display:block;width:20px;height:2px;background:currentColor}
.drawer{display:none;position:fixed;z-index:35;top:var(--nav-h);left:0;right:0;height:calc(100dvh - var(--nav-h));max-height:calc(100dvh - var(--nav-h));overflow-y:auto;overscroll-behavior:contain;background:var(--bg-panel);padding:20px var(--gutter) 40px}
.drawer a{display:flex;align-items:center;width:100%;min-height:44px;padding:12px 16px;text-decoration:none;border-radius:var(--r-sm);color:var(--text)}
.drawer a[aria-current],.drawer a:hover{background:var(--bg-panel-2)}
.drawer-label{display:block;padding:24px 16px 8px;color:var(--text-muted);font-size:12px}
.veil{display:none;position:fixed;inset:var(--nav-h) 0 0;z-index:30;background:color-mix(in srgb,var(--text) 20%,transparent)}
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:1.35fr 1fr 1fr;gap:48px}
.footer-brand p{max-width:340px;margin-top:20px;font-size:14px;color:var(--text-muted)}
.footer-heading{font-family:var(--font-body);font-size:14px;font-weight:600;margin-bottom:16px}
.footer-links{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:6px 20px}
.footer-links a,.footer-languages a,.footer-legal a{display:inline-flex;align-items:center;min-height:28px;font-size:13px;text-decoration:none;color:var(--text-muted);overflow-wrap:anywhere}
.footer-links a:hover,.footer-languages a:hover,.footer-legal a:hover{text-decoration:underline;color:var(--text)}
.footer-languages{display:flex;flex-wrap:wrap;gap:10px 24px;margin-top:40px;padding-top:24px;border-top:1px solid var(--border)}
.footer-bottom{display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;margin-top:20px;font-size:12px;color:var(--text-muted)}
.footer-legal{display:flex;flex-wrap:wrap;gap:20px}
.reveal{transition:opacity var(--reveal-time) ease,transform var(--reveal-time) var(--ease)}
.reveal.pending{opacity:0;transform:translateY(16px)}
.reveal.shown{opacity:1;transform:none}
.decor-region{position:relative;overflow-x:clip}
#server-status{position:relative;display:block;min-width:0;max-width:100%;overflow:hidden;margin-top:24px;margin-bottom:32px}
#server-status+*{margin-top:32px}
#server-status :where(.grid,.servers-grid){display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,240px),1fr));gap:16px}
#server-status :where(.grid,.servers-grid)>*{min-width:0}
body:has(.toc-tabs) section[id]{scroll-margin-top:var(--anchor-offset)}
@media(max-width:1280px){
  .topbar-inner{gap:14px;padding-inline:24px}
  .menu{gap:3px}
  .menu a{padding-inline:9px;font-size:13px}
  .tools{gap:12px}
}
@media(max-width:1120px){
  .desktop-nav{display:none}
  .tools{margin-left:auto}
  .burger{display:inline-flex}
  .drawer.is-open,.veil.is-open{display:block}
}
@media(max-width:768px){
  :root{--gutter:24px;--section-space:56px}
  h1{font-size:clamp(28px,6vw,40px);line-height:1.25}
  h2{font-size:30px}
  h3{font-size:24px}
  .lead{font-size:18px}
  .grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .footer-brand{grid-column:1/-1}
}
@media(max-width:640px){
  :root{--gutter:16px}
  .no-break{white-space:normal}
  .topbar-inner{gap:8px;padding-inline:16px}
  .brand{gap:7px;font-size:16px}
  .brand img{width:28px;height:28px}
  .tools{gap:8px;margin-left:auto}
  .lang-button{font-size:12px;gap:3px}
  .lang-button svg{width:14px;height:14px}
  .login{padding-inline:10px;font-size:13px}
  .burger{padding:9px;min-width:44px}
  .panel,.card{padding:22px}
  .footer-grid{grid-template-columns:1fr}
  .footer-brand{grid-column:auto}
  .footer-bottom{display:block}
  .footer-legal{margin-top:12px}
  .tilt,.decor-tilt,[data-tilt]{transform:none}
  .decor-region{max-width:100%;overflow-x:clip}
}
@media(max-width:359px){
  .topbar-inner{padding-inline:16px;gap:6px}
  .brand{font-size:14px;gap:5px}
  .brand img{width:24px;height:24px}
  .tools{gap:5px}
  .lang-button{font-size:11px}
  .lang-button svg{display:none}
  .login{padding-inline:8px}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation:none!important;transition:none!important}
  .reveal,.reveal.pending{opacity:1;transform:none}
}