:root{
  --bg:#F7EFE0;--bg-panel:#FFFBF3;--bg-panel2:#EFE5D2;--bg-panel-mid:#F6EEDF;--border:#E2D6BF;
  --accent:#0B6E7C;--accent-2:#1597A3;--accent-dark:#074F5A;--text:#2A2118;--text-muted:#6E604F;
  --success:#2F9E5B;--warn:#E0921C;--error:#D2463A;--hero-top:#FBF6EC;--hero-bottom:#F1E7D4;
  --on-accent:#FFFFFF;--flag-white:#FFFFFF;--flag-blue:#2B3A67;--clear:transparent;
  --tint-accent-06:rgba(11,110,124,.06);--tint-accent-08:rgba(11,110,124,.08);--tint-accent-10:rgba(11,110,124,.10);--tint-accent-14:rgba(11,110,124,.14);--tint-accent-18:rgba(11,110,124,.18);
  --tint-warn-16:rgba(224,146,28,.16);--tint-success-14:rgba(47,158,91,.14);--tint-error-14:rgba(210,70,58,.14);
  --shade-accent-10:rgba(11,110,124,.10);--shade-accent-12:rgba(11,110,124,.12);--shade-accent-16:rgba(11,110,124,.16);--shade-accent-22:rgba(11,110,124,.22);--shade-accent-40:rgba(11,110,124,.40);
  --shade-brown-08:rgba(42,33,24,.08);--shade-brown-14:rgba(42,33,24,.14);--veil:rgba(42,33,24,.38);
  --hi-white:rgba(255,255,255,.92);--hi-white-60:rgba(255,255,255,.60);--hi-white-30:rgba(255,255,255,.30);--hi-white-20:rgba(255,255,255,.20);
  --notice-sep:rgba(255,255,255,.55);--side-ink:rgba(255,251,243,.58);--side-soft:rgba(255,251,243,.08);--side-active:rgba(21,151,163,.34);
  --radius-s:6px;--radius-m:8px;--radius-l:10px;--radius-pill:999px;--radius-round:50%;--radius-tiny:4px;
  --font-display:'Inter','Noto Sans SC','Noto Sans JP','Noto Sans KR','PingFang SC','Hiragino Sans','Microsoft YaHei',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;
  --weight-body:400;--weight-medium:600;--weight-bold:700;--weight-heavy:800;--weight-display:900;
  --gutter:24px;--content-width:1248px;--header-height:63px;--notice-height:36px;--menu-top:99px;--anchor-offset:88px;--toc-offset:84px;
  --shadow-panel:inset 0 1px 0 var(--hi-white),0 18px 42px -22px var(--shade-accent-22);
  --grain:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 .165 0 0 0 0 .13 0 0 0 0 .094 0 0 0 .06 0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-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:16px;line-height:1.6;-webkit-font-smoothing:antialiased}
body::after{content:"";position:fixed;inset:0;pointer-events:none;background-image:var(--grain);background-size:180px 180px;opacity:.5;z-index:60}
[hidden]{display:none!important}
img{max-width:100%;height:auto}
svg{flex-shrink:0;vertical-align:middle}
button,input,select,textarea{font:inherit}
button{cursor:pointer}
a{color:var(--accent-dark);text-underline-offset:.2em}
a,button,summary{touch-action:manipulation}
:where(a,button,input,select,textarea,summary,[tabindex]):focus-visible{outline:2px solid var(--accent);outline-offset:3px}
h1,h2,h3,h4{font-family:var(--font-display);color:var(--text);text-wrap:balance}
h1{font-size:clamp(52px,4.8vw,68px);line-height:1.1;font-weight:var(--weight-display);letter-spacing:-.02em;margin:0 0 24px}
h2{font-size:clamp(26px,3vw,38px);line-height:1.25;letter-spacing:-.02em;font-weight:var(--weight-heavy);margin:0 0 20px}
h3{font-size:22px;line-height:1.4;margin:0 0 12px}
p{margin:0 0 16px}
ul,ol{padding-left:1.4em}
pre{max-width:100%;overflow-x:auto;padding:20px;background:var(--bg-panel2);border:1px solid var(--border);border-radius:var(--radius-m)}
code{font-family:var(--font-mono);overflow-wrap:anywhere}
pre code{overflow-wrap:normal;white-space:pre}
table{border-collapse:collapse}
td,th{word-break:keep-all}
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)}
.section{padding-top:64px;padding-bottom:64px}
.reading-wrap{max-width:860px}
.prose{min-width:0;overflow-wrap:break-word}
.prose p,.prose li{line-height:1.85}
.prose h2{margin-top:40px}
.prose h3{margin-top:28px}
.prose img{border-radius:var(--radius-m)}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums}
.muted{color:var(--text-muted)}
.no-break{white-space:nowrap}
.sprite{position:absolute;width:0;height:0;overflow:hidden}
.grid{display:grid;gap:24px}
.grid>*{min-width:0}
.grid-three{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid-five{grid-template-columns:repeat(5,minmax(0,1fr))}
.panel,.card{background:var(--bg-panel);border:1px solid var(--border);border-radius:var(--radius-l);box-shadow:var(--shadow-panel);min-width:0}
.card{padding:24px}
.inset-panel{background:var(--bg-panel2);border:1px solid var(--border);border-radius:var(--radius-m);padding:24px;min-width:0}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:50px;padding:10px 28px;border:1px solid var(--clear);border-radius:var(--radius-m);font-size:16px;font-weight:var(--weight-heavy);letter-spacing:.01em;text-decoration:none;line-height:1.4;flex-shrink:0;white-space:nowrap;transition:background-color .15s,transform .15s,box-shadow .15s}
.btn-primary{background:var(--accent);color:var(--on-accent);box-shadow:inset 0 1px 0 var(--hi-white-30),0 12px 26px -12px var(--shade-accent-40)}
.btn-primary:hover,.btn-primary.is-hover{background:var(--accent-dark);transform:translateY(-1px)}
.btn-ghost,.btn-secondary{border-color:var(--text);color:var(--text);background:var(--clear)}
.btn-ghost:hover,.btn-secondary:hover{background:var(--bg-panel)}
.btn:disabled,.btn[aria-disabled="true"]{opacity:.55;cursor:not-allowed;transform:none}
.btn-small{min-height:40px;padding:8px 16px;font-size:14px}
.notice{min-height:var(--notice-height);padding:6px var(--gutter);display:flex;align-items:center;justify-content:center;background:linear-gradient(90deg,var(--accent),var(--accent-2));color:var(--on-accent);font-size:13.5px;font-weight:var(--weight-medium);letter-spacing:.01em;box-shadow:inset 0 -1px 0 var(--shade-brown-14)}
.notice-line{display:flex;align-items:center;justify-content:center;flex-wrap:wrap;gap:4px 12px;max-width:100%;margin:0}
.notice-item{display:inline-flex;align-items:center;gap:6px}
.notice-sep{color:var(--notice-sep)}
.stage{background:linear-gradient(180deg,var(--clear),var(--tint-accent-06)),linear-gradient(180deg,var(--hero-top),var(--hero-bottom))}
#site-header{position:relative;z-index:40}
.masthead{position:relative;z-index:42;border-bottom:1px solid var(--border);background:var(--hero-top)}
.stage .masthead{background:var(--clear)}
.masthead-row{height:var(--header-height);display:flex;align-items:center;flex-wrap:nowrap;position:relative}
.brand{display:inline-flex;align-items:center;gap:9px;text-decoration:none;flex-shrink:0;color:var(--text)}
.brand img{width:30px;height:30px;flex-shrink:0}
.brand-word{font-family:var(--font-display);font-weight:var(--weight-display);font-size:21px;letter-spacing:-.03em}
.mainnav{margin-left:36px;flex:1;min-width:0}
.mainnav ul{display:flex;align-items:center;list-style:none;margin:0;padding:0;gap:2px}
.mainnav a{display:inline-flex;align-items:center;gap:6px;min-height:36px;padding:0 11px;border-radius:var(--radius-m);font-size:14px;font-weight:var(--weight-medium);color:var(--text-muted);text-decoration:none;white-space:nowrap;transition:background-color .15s,color .15s}
.mainnav svg,.drawer svg{width:16px;height:16px}
.mainnav a:hover{background:var(--tint-accent-08);color:var(--text)}
.mainnav a[aria-current="page"]{background:var(--tint-accent-10);color:var(--accent-dark)}
.masthead-tools{margin-left:auto;display:flex;align-items:center;gap:10px;flex-shrink:0}
.lang-box{position:relative}
.lang{display:inline-flex;align-items:center;justify-content:center;gap:6px;min-height:36px;width:auto;padding:0 12px;border:1px solid var(--border);border-radius:var(--radius-m);background:var(--bg-panel);font-size:13.5px;font-weight:var(--weight-medium);color:var(--text-muted)}
.lang span{white-space:nowrap}
.lang-caret{font-size:11px}
.lang-panel{position:absolute;right:0;top:calc(100% + 8px);z-index:50;min-width:168px;padding:6px;background:var(--bg-panel);border:1px solid var(--border);border-radius:var(--radius-m);box-shadow:var(--shadow-panel)}
.lang-panel a{display:flex;align-items:center;min-height:40px;padding:8px 12px;text-decoration:none;color:var(--text);border-radius:var(--radius-s)}
.lang-panel a:hover,.lang-panel a[aria-current]{background:var(--tint-accent-10)}
.login{display:inline-flex;align-items:center;justify-content:center;gap:7px;min-height:36px;padding:0 16px;border-radius:var(--radius-m);background:var(--text);color:var(--bg-panel);font-size:14px;font-weight:var(--weight-bold);text-decoration:none;box-shadow:inset 0 1px 0 var(--hi-white-20);transition:background-color .15s;white-space:nowrap}
.login:hover{background:var(--accent-dark)}
.menu-toggle{display:none;align-items:center;justify-content:center;flex-direction:column;gap:4px;min-width:44px;min-height:44px;border:1px solid var(--border);border-radius:var(--radius-m);background:var(--bg-panel);color:var(--text)}
.menu-line{display:block;width:20px;height:2px;background:currentColor}
.drawer{position:fixed;top:var(--menu-top);right:0;left:0;z-index:41;height:calc(100dvh - var(--menu-top));max-height:calc(100dvh - var(--menu-top));padding:16px var(--gutter) 32px;background:var(--bg-panel);overflow-y:auto;overscroll-behavior:contain}
.drawer ul{list-style:none;margin:0;padding:0}
.drawer a{display:flex;align-items:center;gap:12px;width:100%;min-height:44px;padding:12px 16px;text-decoration:none;color:var(--text);border-radius:var(--radius-s)}
.drawer a:hover,.drawer a[aria-current]{background:var(--tint-accent-10)}
.drawer-languages{margin-top:16px;padding-top:16px;border-top:1px solid var(--border)}
.nav-veil{position:fixed;inset:var(--menu-top) 0 0;z-index:39;background:var(--veil);border:0}
html.nav-open{overflow:hidden}
.site-footer{background:var(--bg-panel2);border-top:1px solid var(--border);padding-top:48px;padding-bottom:24px}
.footer-grid{display:grid;grid-template-columns:1.3fr 1fr 1fr;gap:40px}
.footer-brand p{max-width:32em;margin-top:16px;color:var(--text-muted);font-size:14px}
.footer-title{font-size:15px;font-weight:var(--weight-heavy);margin:0 0 12px}
.footer-links{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:6px 16px}
.footer-links a,.footer-languages a,.footer-legal a{display:inline-flex;align-items:center;min-height:28px;color:var(--text-muted);font-size:14px;text-decoration:none}
.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:8px 20px;padding-top:28px;padding-bottom:20px}
.footer-bottom{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:16px;border-top:1px solid var(--border);padding-top:20px;font-size:13px;color:var(--text-muted)}
.footer-legal{display:flex;gap:20px}
.reveal{transition:opacity .35s ease,transform .35s ease}
.reveal.pending{opacity:0;transform:translateY(16px)}
.reveal.shown{opacity:1;transform:none}
#server-status{display:block;position:static;min-width:0;max-width:100%;overflow:hidden;margin-top:24px;margin-bottom:24px}
#server-status+*{margin-top:24px}
#server-status>*{min-width:0;max-width:100%}
.decorative-region,.stripe-halo-host{position:relative;overflow-x:clip}
@media(max-width:1200px){
  .mainnav{margin-left:20px}.mainnav a{padding-inline:8px;gap:5px}.masthead-tools{gap:8px}
}
@media(max-width:1080px){
  .mainnav{display:none}.menu-toggle{display:inline-flex}.masthead-tools{margin-left:auto}
}
@media(min-width:1081px){
  .drawer,.nav-veil{display:none!important}
}
@media(max-width:768px){
  h1{font-size:clamp(28px,6vw,40px)}h2{font-size:28px}
  .grid-three{grid-template-columns:1fr}.grid-five{grid-template-columns:repeat(2,minmax(0,1fr))}
  .section{padding-top:40px;padding-bottom:40px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}.footer-brand{grid-column:1/-1}
}
@media(max-width:640px){
  :root{--gutter:16px}
  .no-break{white-space:normal}
  .tilt,.decorative-tilt{transform:none}
  .decorative-region,.stripe-halo-host{max-width:100%}
  .notice{padding-inline:var(--gutter);justify-content:flex-start}
  .notice-line{display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:100%;font-size:12px}
  .notice-item{display:inline}.notice-sep{margin-inline:6px}
  .masthead-tools{margin-left:auto;gap:6px}
  .brand{gap:6px}.brand-word{font-size:18px}.brand img{width:26px;height:26px}
  .lang{padding-inline:8px;font-size:12px;min-height:36px}.lang-caret{display:none}
  .login{padding-inline:12px;font-size:13px}
  .menu-toggle{min-width:44px}
  .card,.inset-panel{padding:20px}
  .footer-grid{grid-template-columns:1fr}.footer-brand{grid-column:auto}
}
@media(max-width:359px){
  .brand-word{font-size:16px}.brand img{width:22px;height:22px}.brand{gap:4px}
  .masthead-tools{gap:4px}.login{padding-inline:9px}.lang{padding-inline:6px;font-size:11px}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reveal,.reveal.pending,.reveal.shown{opacity:1;transform:none;transition:none}
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}
}