:root{
  --bg:#F7F0E3;
  --bg-panel:#FFFBF4;
  --bg-panel-2:#EFE5D3;
  --border:#E2D5BF;
  --border-strong:#D3C2A6;
  --accent:#E2511B;
  --accent-dark:#B03C0E;
  --text:#261C14;
  --text-muted:#6E5F50;
  --success:#2F8F5B;
  --warn:#C98A12;
  --error:#C23B2E;
  --on-accent:#FFFFFF;
  --hero-top:#FBF6EC;
  --hero-bottom:#F1E7D5;
  --grid-line:rgba(38,28,20,.04);
  --accent-06:rgba(226,81,27,.06);
  --accent-10:rgba(226,81,27,.10);
  --accent-18:rgba(226,81,27,.18);
  --accent-40:rgba(226,81,27,.40);
  --accent-hi-line:rgba(255,255,255,.24);
  --hi-white:rgba(255,255,255,.88);
  --success-15:rgba(47,143,91,.16);
  --ink-deep:#2A1E15;
  --win-raise:#36281C;
  --win-line:#3A2C20;
  --win-row:rgba(255,251,244,.07);
  --win-row-2:rgba(255,251,244,.10);
  --win-hi:rgba(255,251,244,.16);
  --win-edge:rgba(255,251,244,.05);
  --win-text:#F4EADB;
  --win-muted:#A8977F;
  --win-switch:#7A6249;
  --win-pick:rgba(255,251,244,.55);
  --success-soft:#86CFA6;
  --success-20:rgba(47,143,91,.26);
  --warn-soft:#E9B85E;
  --warn-20:rgba(201,138,18,.22);
  --shadow-win:rgba(42,30,21,.46);
  --shadow-win-s:rgba(42,30,21,.18);
  --veil:rgba(42,30,21,.46);
  --flag-red:#C8323A;
  --flag-white:#FFFDF8;
  --flag-blue:#24356E;
  --flag-gold:#E3A82B;
  --flag-black:#1E1712;
  --shadow-panel:inset 0 0 0 1px var(--hi-white),0 26px 56px -22px var(--accent-18),0 6px 16px -8px var(--accent-10);
  --shadow-soft:inset 0 1px 0 var(--hi-white),0 8px 18px -10px var(--accent-18);
  --r-xs:4px;
  --r-sm:6px;
  --r-md:8px;
  --r-lg:10px;
  --r-xl:12px;
  --r-plan:7px;
  --r-flag:3px;
  --r-pill:999px;
  --r-round: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",ui-monospace,"SFMono-Regular",Menlo,Consolas,monospace;
  --container:1312px;
  --reading:816px;
  --gutter:24px;
  --space-1:8px;
  --space-2:16px;
  --space-3:24px;
  --space-4:32px;
  --space-6:48px;
  --space-8:64px;
  --space-12:96px;
  --text-xs:12px;
  --text-sm:14px;
  --text-base:16px;
  --text-lg:20px;
  --title-sm:24px;
  --title-md:36px;
  --title-lg:48px;
  --display:68px;
  --display-mobile:38px;
  --notice-height:40px;
  --head-height:64px;
  --head-total:104px;
  --anchor-offset:88px;
  --toc-offset:96px;
  --ease: .2s ease;
}
*,*::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-color:var(--bg);background-image:linear-gradient(to right,var(--grid-line) 1px,transparent 1px),linear-gradient(to bottom,var(--grid-line) 1px,transparent 1px);background-size:32px 32px;color:var(--text);font-family:var(--font-body);font-size:var(--text-base);line-height:1.6;-webkit-font-smoothing:antialiased}
h1,h2,h3,h4{font-family:var(--font-display);color:var(--text);text-wrap:balance;overflow-wrap:break-word}
h1{font-size:clamp(52px,5vw,72px);font-weight:900;line-height:1.1;letter-spacing:-.02em}
h2{font-size:clamp(28px,3.5vw,var(--title-lg));font-weight:900;line-height:1.2;letter-spacing:-.02em}
h3{font-size:var(--title-sm);font-weight:800;line-height:1.3}
p{margin:0 0 var(--space-3)}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
button{background:none;border:0;padding:0;cursor:pointer}
button:disabled,[aria-disabled="true"]{cursor:not-allowed}
:where(a,button,input,select,textarea,summary,[tabindex]):focus-visible{outline:2px solid var(--accent-dark);outline-offset:3px;border-radius:var(--r-sm)}
img,video{max-width:100%;height:auto}
svg{flex-shrink:0}
img{vertical-align:middle}
ul,ol{padding-inline-start:24px}
code{font-family:var(--font-mono);font-size:.9em;overflow-wrap:anywhere}
pre{max-width:100%;overflow-x:auto;padding:var(--space-3);background:var(--ink-deep);color:var(--win-text);border-radius:var(--r-md)}
pre code{white-space:pre;overflow-wrap:normal}
blockquote{margin-inline:0}
[hidden]{display:none!important}
.wrap{width:100%;max-width:var(--container);margin-inline:auto;padding-inline:var(--gutter)}
.reading-wrap{width:100%;max-width:var(--reading);margin-inline:auto;padding-inline:var(--gutter)}
.section{padding-top:var(--space-12);padding-bottom:var(--space-12)}
.section-head{text-align:center;max-width:900px;margin:0 auto var(--space-6)}
.section-head h2{margin:0 0 var(--space-3)}
.section-head p{color:var(--text-muted)}
.stack{display:grid;gap:var(--space-3)}
.grid-three{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:var(--space-3)}
.grid-five{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:var(--space-2)}
:where(.grid-three,.grid-five,.deck,.footer-grid,.feature-trio,.feature-pair)>*{min-width:0}
.no-break{white-space:nowrap}
.muted{color:var(--text-muted)}
.mono{font-family:var(--font-mono)}
.text-link{display:inline-flex;align-items:center;min-height:24px;color:var(--accent-dark);font-weight:700;text-decoration:underline;text-underline-offset:3px}
.panel{background:var(--bg-panel);border:1px solid var(--border);border-radius:var(--r-xl);box-shadow:var(--shadow-panel);padding:var(--space-3);min-width:0}
.prose{min-width:0;overflow-wrap:break-word}
.prose p,.prose li{line-height:1.85}
.prose h2{margin-top:var(--space-8);font-size:var(--title-md)}
.prose h3{margin-top:var(--space-4)}
.prose a{color:var(--accent-dark);text-decoration:underline;text-underline-offset:3px}
.prose img{border-radius:var(--r-xl)}
.sprite{position:absolute;width:0;height:0;overflow:hidden}
.fx-red{fill:var(--flag-red)}
.fx-white{fill:var(--flag-white)}
.fx-blue{fill:var(--flag-blue)}
.fx-gold{fill:var(--flag-gold)}
.fx-black{fill:var(--flag-black)}
.fs-white{fill:none;stroke:var(--flag-white)}
.fs-red{fill:none;stroke:var(--flag-red)}
.flag{width:24px;height:16px;flex-shrink:0;clip-path:inset(0 round var(--r-flag))}
.icon{width:20px;height:20px;fill:currentColor;flex-shrink:0}
.notice{display:flex;align-items:center;justify-content:center;gap:8px;min-height:var(--notice-height);padding:6px 16px;background:var(--accent-dark);color:var(--on-accent);font-size:var(--text-sm);font-weight:500;letter-spacing:.01em;text-align:center}
.notice-arrow{display:inline-block}
.notice:hover .notice-text{text-decoration:underline;text-underline-offset:3px}
#site-header{position:relative;z-index:50}
.site-head{position:relative;z-index:50;background:var(--hero-top);border-bottom:1px solid var(--border)}
.head-row{display:flex;align-items:center;flex-wrap:nowrap;gap:40px;height:var(--head-height)}
.brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0;font-family:var(--font-display);font-weight:900;font-size:20px;letter-spacing:-.02em;color:var(--text);min-height:30px}
.brand-mark{width:30px;height:30px;border-radius:var(--r-md);box-shadow:inset 0 1px 0 var(--accent-hi-line),0 6px 14px -6px var(--accent-40);flex-shrink:0}
.nav{display:flex;align-items:center;flex:1;min-width:0}
.nav ul{display:flex;align-items:center;list-style:none;margin:0;padding:0;gap:2px}
.nav li{list-style:none;min-width:0}
.nav-link{display:inline-flex;align-items:center;justify-content:center;gap:4px;height:36px;padding:0 13px;border-radius:var(--r-md);font-size:15px;font-weight:500;color:var(--text-muted);white-space:nowrap}
.nav-link:hover{background:var(--bg-panel-2);color:var(--text)}
.nav-link[aria-current="page"]{color:var(--text);font-weight:700}
.nav-more{position:relative}
.nav-caret{font-size:11px;color:var(--text-muted)}
.nav-panel{position:absolute;z-index:70;top:calc(100% + 8px);left:0;min-width:200px;padding:8px;background:var(--bg-panel);border:1px solid var(--border);border-radius:var(--r-xl);box-shadow:var(--shadow-panel);display:none}
.nav-more.is-open .nav-panel,.nav-more:hover .nav-panel,.nav-more:focus-within .nav-panel,.nav-more[open] .nav-panel{display:block}
.nav-more summary{list-style:none}
.nav-more summary::-webkit-details-marker{display:none}
.nav-panel-label{display:block;padding:6px 10px 4px;font-family:var(--font-mono);font-size:11px;letter-spacing:.08em;color:var(--text-muted)}
.nav-panel a{display:flex;align-items:center;min-height:40px;padding:8px 10px;border-radius:var(--r-sm);font-size:var(--text-sm);font-weight:500}
.nav-panel a:hover,.nav-panel a[aria-current="page"]{background:var(--bg-panel-2)}
.head-tools{margin-left:auto;display:flex;align-items:center;gap:12px;flex-shrink:0}
.lang-picker{position:relative}
.lang{display:inline-flex;align-items:center;justify-content:center;gap:6px;min-height:36px;min-width:44px;width:auto;padding:0 12px;border-radius:var(--r-md);font-size:var(--text-sm);font-weight:500;color:var(--text-muted);white-space:nowrap}
.lang:hover{background:var(--bg-panel-2);color:var(--text)}
.lang svg{width:16px;height:16px;flex-shrink:0}
.lang-text{white-space:nowrap}
.lang-panel{display:none;position:absolute;z-index:80;top:calc(100% + 10px);right:0;width:192px;padding:8px;background:var(--bg-panel);border:1px solid var(--border);border-radius:var(--r-lg);box-shadow:var(--shadow-panel)}
.lang-picker.is-open .lang-panel{display:block}
.lang-panel a{display:flex;align-items:center;min-height:44px;padding:8px 12px;border-radius:var(--r-sm);font-size:var(--text-sm)}
.lang-panel a:hover,.lang-panel a[aria-current="true"]{background:var(--bg-panel-2);color:var(--accent-dark)}
.btn-login{display:inline-flex;align-items:center;justify-content:center;height:40px;padding:0 20px;border-radius:var(--r-md);background:var(--text);color:var(--bg-panel);font-size:15px;font-weight:700;white-space:nowrap;box-shadow:inset 0 1px 0 var(--win-hi),0 8px 18px -10px var(--shadow-win)}
.btn-login:hover{background:var(--ink-deep)}
.menu-toggle{display:none;align-items:center;justify-content:center;flex-direction:column;gap:5px;min-width:44px;min-height:44px;border-radius:var(--r-md)}
.menu-line{display:block;width:20px;height:2px;background:currentColor}
.menu-toggle[aria-expanded="true"]{background:var(--bg-panel-2)}
.mobile-drawer{display:none;position:fixed;z-index:45;top:var(--head-total);left:0;right:0;height:calc(100dvh - var(--head-total));max-height:calc(100dvh - var(--head-total));overflow-y:auto;overscroll-behavior:contain;background:var(--bg-panel);padding:16px var(--gutter) 32px;border-top:1px solid var(--border)}
.mobile-drawer.is-open{display:block}
.mobile-drawer a{display:flex;align-items:center;width:100%;min-height:44px;padding:12px 16px;border-radius:var(--r-md);font-weight:600}
.mobile-drawer a:hover,.mobile-drawer a[aria-current]{background:var(--bg-panel-2)}
.drawer-label{margin:20px 16px 8px;color:var(--text-muted);font-size:var(--text-sm)}
.drawer-languages{border-top:1px solid var(--border);margin-top:16px;padding-top:8px}
.menu-veil{display:none;position:fixed;z-index:40;inset:var(--head-total) 0 0;background:var(--veil)}
.menu-veil.is-open{display:block}
html.nav-open{overflow:hidden}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:48px;padding:10px 26px;border-radius:var(--r-md);font-size:var(--text-base);font-weight:700;flex-shrink:0;white-space:nowrap;transition:background var(--ease),border-color var(--ease)}
.btn svg{width:16px;height:16px;flex-shrink:0}
.btn-primary{background:var(--accent);color:var(--on-accent);box-shadow:inset 0 1px 0 var(--accent-hi-line),0 12px 26px -12px var(--accent-40)}
.btn-primary:hover,.btn-primary.is-hover{background:var(--accent-dark)}
.btn-ghost,.btn-secondary{background:var(--bg-panel);color:var(--text);border:1px solid var(--border-strong);box-shadow:inset 0 1px 0 var(--hi-white)}
.btn-ghost:hover,.btn-secondary:hover{border-color:var(--text-muted)}
.btn:active{transform:translateY(1px)}
.btn:disabled,.btn[aria-disabled="true"]{background:var(--bg-panel-2);color:var(--text-muted);box-shadow:none}
.cta-row{display:flex;justify-content:center;flex-wrap:wrap;gap:12px;margin-top:24px}
.pill-badge{display:inline-flex;align-items:center;gap:8px;min-height:30px;padding:4px 14px;border-radius:var(--r-pill);background:var(--bg-panel);border:1px solid var(--border);box-shadow:var(--shadow-soft);font-size:13px;font-weight:500;color:var(--text-muted);max-width:100%}
.pill-badge strong{color:var(--text);font-weight:700}
.pill-dot{width:8px;height:8px;border-radius:var(--r-round);background:var(--success);flex-shrink:0;box-shadow:0 0 0 3px var(--success-15)}
.chip{display:inline-flex;align-items:center;min-height:24px;margin-top:10px;padding:2px 9px;border-radius:var(--r-sm);background:var(--accent-10);color:var(--accent-dark);font-family:var(--font-mono);font-size:var(--text-xs);font-weight:600;max-width:100%;overflow-wrap:anywhere}
.facts{display:flex;justify-content:center;flex-wrap:wrap;gap:8px;margin:14px 0 0;padding:0;list-style:none}
.fact{display:inline-flex;align-items:center;gap:6px;min-height:30px;padding:4px 12px;border-radius:var(--r-pill);background:var(--bg-panel);border:1px solid var(--border);box-shadow:inset 0 1px 0 var(--hi-white);font-size:13px;font-weight:600;color:var(--text);max-width:100%}
.fact svg{width:14px;height:14px;flex-shrink:0;color:var(--accent-dark)}
.platforms{display:flex;justify-content:center;align-items:center;flex-wrap:wrap;gap:8px 22px;margin:14px 0 0;padding:0;list-style:none;font-size:13px;font-weight:600;color:var(--text-muted)}
.platforms li{display:inline-flex;align-items:center;gap:6px}
.platforms svg{width:16px;height:16px;flex-shrink:0;color:var(--text)}
.platforms-label{font-family:var(--font-mono);font-size:11px;font-weight:500;letter-spacing:.08em;color:var(--text-muted)}
.site-footer{background:var(--bg-panel-2);border-top:1px solid var(--border);padding-top:var(--space-8);padding-bottom:var(--space-3)}
.footer-grid{display:grid;grid-template-columns:1.3fr 1fr 1fr;gap:var(--space-6)}
.footer-brand p{max-width:340px;margin-top:16px;color:var(--text-muted);font-size:var(--text-sm)}
.footer-heading{font-size:var(--text-sm);font-weight:800;margin:0 0 12px}
.footer-links{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:4px 16px}
.footer-links a{display:flex;align-items:center;min-height:32px;font-size:var(--text-sm);color:var(--text-muted)}
.footer-links a:hover{color:var(--accent-dark);text-decoration:underline}
.footer-languages{display:flex;flex-wrap:wrap;gap:8px 20px;margin-top:32px;padding-block:16px;border-top:1px solid var(--border)}
.footer-languages a{display:inline-flex;align-items:center;min-height:32px;font-size:var(--text-sm)}
.footer-bottom{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:12px;padding-block:16px;border-top:1px solid var(--border);color:var(--text-muted);font-size:var(--text-xs)}
.footer-legal{display:flex;flex-wrap:wrap;gap:20px}
.footer-legal a{display:inline-flex;align-items:center;min-height:24px}
.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:relative;max-width:100%;min-width:0;overflow:hidden;margin-top:var(--space-4);margin-bottom:var(--space-4)}
#server-status+*{margin-top:var(--space-4)}
[data-counter]{display:inline-block;min-width:3ch;font-family:var(--font-mono);font-variant-numeric:tabular-nums;text-align:right}
[data-counter="7"]{min-width:1ch}
.decoration-region{position:relative;overflow-x:clip;max-width:100%}
@media(max-width:1180px){
  .head-row{gap:24px}
  .nav-link{padding-inline:10px}
}
@media(max-width:960px){
  .nav{display:none}
  .menu-toggle{display:flex}
  .head-tools{margin-left:auto}
  .footer-grid{grid-template-columns:1fr 1fr}
  .footer-brand{grid-column:1/-1}
  .grid-five{grid-template-columns:repeat(3,minmax(0,1fr))}
}
@media(min-width:961px){
  .mobile-drawer.is-open,.menu-veil.is-open{display:none}
}
@media(max-width:768px){
  h1{font-size:var(--display-mobile)}
  .section{padding-top:var(--space-8);padding-bottom:var(--space-8)}
  .grid-three{grid-template-columns:minmax(0,1fr)}
  .head-row{gap:16px}
  .lang-text{display:none}
  .lang{padding-inline:8px}
  .head-tools{gap:8px;margin-left:auto}
}
@media(max-width:640px){
  :root{--gutter:16px}
  .no-break{white-space:normal}
  .facts{gap:6px}
  .tilt,[data-tilt]{transform:none}
  .decoration-region{max-width:100%}
  .footer-grid{grid-template-columns:minmax(0,1fr);gap:24px}
  .footer-brand{grid-column:auto}
  .grid-five{grid-template-columns:minmax(0,1fr)}
  .brand{font-size:18px;gap:8px}
  .head-row{gap:8px}
  .head-tools{gap:4px;margin-left:auto}
  .btn-login{padding-inline:12px;font-size:var(--text-sm)}
  .prose h2{font-size:28px}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{transition:none!important;animation:none!important}
  .reveal,.reveal.pending{opacity:1;transform:none}
}