:root{
  --color-canvas:#FBF6EA;
  --color-surface:#FFFCF3;
  --color-surface-soft:#F2EADA;
  --color-line:#E3D8C1;
  --color-accent:#0F6F8E;
  --color-accent-deep:#0A5069;
  --color-ink:#2B2318;
  --color-ink-soft:#6E6353;
  --color-success:#2E7D4F;
  --color-warning:#B97F1D;
  --color-error:#B5432E;
  --color-flag-red:#C0392B;
  --color-flag-blue:#2E4A73;
  --color-flag-white:#FFFFFF;
  --color-shadow:rgba(43,35,24,.15);
  --color-shadow-soft:rgba(43,35,24,.08);
  --color-focus:rgba(15,111,142,.22);
  --font-display:'Inter','Noto Sans SC','Noto Sans JP','Noto Sans KR',-apple-system,'PingFang SC','Hiragino Sans','Malgun Gothic',sans-serif;
  --font-body:'Inter','Noto Sans SC','Noto Sans JP','Noto Sans KR',-apple-system,'PingFang SC','Hiragino Sans','Malgun Gothic',sans-serif;
  --font-mono:'JetBrains Mono','SFMono-Regular',Consolas,'Liberation Mono',monospace;
  --radius-pill:999px;
  --radius-card:18px;
  --radius-small:10px;
  --shadow-card:0 10px 30px -18px rgba(43,35,24,.28);
  --shadow-raised:0 20px 48px -30px rgba(43,35,24,.36);
  --wrap:1320px;
  --gutter:44px;
  --header-height:72px;
  --section-space:96px;
  --toc-offset:94px;
  --line-readable:72ch;
}
*,
*::before,
*::after{box-sizing:border-box}
html{
  scroll-behavior:smooth;
  scroll-padding-top:88px;
  background:var(--color-canvas);
}
html.nav-open{overflow:hidden}
body{
  margin:0;
  min-width:320px;
  overflow-x:clip;
  background:var(--color-canvas);
  color:var(--color-ink);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23n)' opacity='.045'/%3E%3C/svg%3E");
}
header,main,footer{position:relative;z-index:1}
img,svg,video{display:block;max-width:100%}
img{height:auto}
button,input,select,textarea{font:inherit}
button{color:inherit}
a{color:inherit;text-decoration:none}
p,ul,ol,blockquote,pre,table{margin-top:0}
p{margin-bottom:1rem}
ul,ol{padding-left:1.3rem}
li+li{margin-top:.35rem}
h1,h2,h3,h4{
  margin:0 0 .7em;
  color:var(--color-ink);
  font-family:var(--font-display);
  line-height:1.16;
  text-wrap:balance;
}
h1{
  font-size:clamp(3.25rem,5vw,4.5rem);
  font-weight:900;
  letter-spacing:-.015em;
}
h2{
  font-size:clamp(2rem,3.2vw,3rem);
  font-weight:850;
  letter-spacing:-.012em;
}
h3{font-size:clamp(1.25rem,2vw,1.55rem);font-weight:800}
h4{font-size:1.05rem;font-weight:800}
strong{font-weight:750}
small{font-size:.84rem}
code,kbd,samp{font-family:var(--font-mono)}
:not(pre)>code{
  padding:.12em .38em;
  border:1px solid var(--color-line);
  border-radius:var(--radius-small);
  background:var(--color-surface-soft);
  overflow-wrap:anywhere;
}
pre{
  max-width:100%;
  overflow-x:auto;
  padding:1rem;
  border:1px solid var(--color-line);
  border-radius:var(--radius-card);
  background:var(--color-ink);
  color:var(--color-surface);
  -webkit-overflow-scrolling:touch;
}
pre code{white-space:pre}
hr{border:0;border-top:1px solid var(--color-line);margin:2rem 0}
::selection{background:var(--color-focus);color:var(--color-ink)}
:where(a,button,input,select,textarea,summary,[role="tab"]):focus-visible{
  outline:2px solid var(--color-accent);
  outline-offset:3px;
}
.no-break{white-space:nowrap}
@media(max-width:768px){
  h1 .no-break,h2 .no-break{white-space:normal}
}
.wrap{
  position:relative;
  z-index:1;
  width:100%;
  max-width:var(--wrap);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.narrow{max-width:860px}
.section{
  padding-top:var(--section-space);
  padding-bottom:var(--section-space);
  overflow-x:clip;
}
.section-soft{background:var(--color-surface-soft)}
.section-head{max-width:760px;margin-bottom:2.6rem}
.eyebrow{
  margin-bottom:.8rem;
  color:var(--color-accent);
  font-family:var(--font-mono);
  font-size:.76rem;
  font-weight:700;
  letter-spacing:.13em;
  text-transform:uppercase;
}
.lead{
  max-width:var(--line-readable);
  color:var(--color-ink-soft);
  font-size:clamp(1.05rem,1.5vw,1.22rem);
}
.muted{color:var(--color-ink-soft)}
.accent{color:var(--color-accent)}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums}
.badge,
.tag{
  display:inline-flex;
  min-height:28px;
  max-width:100%;
  align-items:center;
  gap:.45rem;
  padding:.25rem .72rem;
  overflow:hidden;
  border:1px solid var(--color-line);
  border-radius:var(--radius-pill);
  background:var(--color-surface);
  color:var(--color-ink-soft);
  font-size:.78rem;
  line-height:1.25;
}
.badge-dot{
  width:7px;
  height:7px;
  flex-shrink:0;
  border-radius:50%;
  background:var(--color-accent);
}
.tag-accent{border-color:var(--color-accent);color:var(--color-accent)}
.btn{
  display:inline-flex;
  min-height:48px;
  min-width:24px;
  align-items:center;
  justify-content:center;
  gap:.45rem;
  padding:.72rem 1.8rem;
  border:1.5px solid transparent;
  border-radius:var(--radius-pill);
  cursor:pointer;
  font-family:var(--font-display);
  font-size:.96rem;
  font-weight:750;
  line-height:1.2;
  transition:transform .15s ease,background-color .15s ease,border-color .15s ease,color .15s ease,box-shadow .15s ease;
}
.btn:hover{transform:translateY(-1px)}
.btn-primary{
  border-color:var(--color-accent);
  background:var(--color-accent);
  color:var(--color-surface);
  box-shadow:0 12px 26px -14px var(--color-accent-deep);
}
.btn-primary:hover{border-color:var(--color-accent-deep);background:var(--color-accent-deep)}
.btn-secondary{
  border-color:var(--color-line);
  background:var(--color-surface);
  color:var(--color-ink);
}
.btn-secondary:hover{border-color:var(--color-ink-soft)}
.btn-text{min-height:36px;padding:.35rem .1rem;color:var(--color-accent)}
.btn[aria-disabled="true"],.btn:disabled{cursor:not-allowed;opacity:.55;transform:none}
.button-row{display:flex;flex-wrap:wrap;gap:.85rem;align-items:center}
.panel,
.card{
  min-width:0;
  border:1px solid var(--color-line);
  border-radius:var(--radius-card);
  background:var(--color-surface);
  box-shadow:var(--shadow-card);
}
.panel{padding:clamp(1.2rem,3vw,2rem)}
.card{padding:1.35rem}
.card:hover{box-shadow:var(--shadow-raised)}
.grid-2,.grid-3,.grid-4{display:grid;gap:1.25rem}
.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid-4{grid-template-columns:repeat(4,minmax(0,1fr))}
.reveal{transition:opacity .62s ease,transform .62s ease}
.reveal.pending{opacity:0;transform:translateY(16px)}
.reveal.shown{opacity:1;transform:none}
.site-head{
  position:relative;
  z-index:50;
  border-bottom:1px solid var(--color-line);
  background:color-mix(in srgb,var(--color-canvas) 88%,transparent);
}
.head-inner{
  z-index:46;
  display:flex;
  min-width:0;
  height:var(--header-height);
  align-items:center;
  gap:1.15rem;
}
.brand{
  display:inline-flex;
  min-height:44px;
  flex-shrink:0;
  align-items:center;
  gap:.55rem;
  font-family:var(--font-display);
  font-size:1.2rem;
  font-weight:850;
}
.brand-logo{width:28px;height:28px}
.brand-local{color:var(--color-ink-soft);font-size:.82em;font-weight:600}
.main-nav{
  display:flex;
  min-width:0;
  align-items:center;
  gap:.1rem;
  margin-left:auto;
}
.main-nav a{
  display:inline-flex;
  min-height:36px;
  align-items:center;
  justify-content:center;
  padding:.38rem .78rem;
  border-radius:var(--radius-pill);
  color:var(--color-ink-soft);
  font-size:.84rem;
  white-space:nowrap;
}
.main-nav a:hover{background:var(--color-surface-soft);color:var(--color-ink)}
.main-nav a[aria-current="page"]{background:var(--color-surface-soft);color:var(--color-ink);font-weight:700}
.head-tools{display:flex;flex-shrink:0;align-items:center;gap:.6rem}
.lang-control{position:relative}
.lang-button{
  display:inline-flex;
  min-height:40px;
  align-items:center;
  justify-content:center;
  padding:.35rem .55rem;
  border:0;
  background:transparent;
  color:var(--color-ink-soft);
  cursor:pointer;
  font-size:.82rem;
}
.lang-menu{
  position:absolute;
  top:calc(100% + .55rem);
  right:0;
  display:none;
  min-width:150px;
  padding:.45rem;
  border:1px solid var(--color-line);
  border-radius:var(--radius-small);
  background:var(--color-surface);
  box-shadow:var(--shadow-raised);
}
.lang-control.open .lang-menu{display:block}
.lang-menu a{
  display:flex;
  min-height:40px;
  align-items:center;
  padding:.45rem .65rem;
  border-radius:var(--radius-small);
  color:var(--color-ink-soft);
  font-size:.84rem;
}
.lang-menu a:hover,.lang-menu a[aria-current="true"]{background:var(--color-surface-soft);color:var(--color-ink)}
.btn-login{
  display:inline-flex;
  min-height:40px;
  align-items:center;
  justify-content:center;
  padding:.42rem 1.05rem;
  border:1.5px solid var(--color-accent);
  border-radius:var(--radius-pill);
  color:var(--color-accent);
  font-size:.85rem;
  font-weight:700;
}
.btn-login:hover{background:var(--color-accent);color:var(--color-surface)}
.menu-toggle{
  display:none;
  min-width:44px;
  min-height:44px;
  align-items:center;
  justify-content:center;
  border:1px solid var(--color-line);
  border-radius:var(--radius-pill);
  background:var(--color-surface);
  cursor:pointer;
}
.menu-toggle svg{width:20px;height:20px}
.mobile-nav{
  position:absolute;
  top:var(--header-height);
  right:var(--gutter);
  left:var(--gutter);
  z-index:53;
  display:none;
  max-height:calc(100dvh - var(--header-height) - 12px);
  overflow-y:auto;
  padding:.7rem;
  border:1px solid var(--color-line);
  border-radius:var(--radius-card);
  background:var(--color-surface);
  box-shadow:var(--shadow-raised);
  overscroll-behavior:contain;
}
.mobile-nav.open{display:block}
.mobile-nav a{
  display:flex;
  width:100%;
  min-height:46px;
  align-items:center;
  padding:.65rem .85rem;
  border-radius:var(--radius-small);
  color:var(--color-ink-soft);
}
.mobile-nav a:hover,.mobile-nav a[aria-current="page"]{background:var(--color-surface-soft);color:var(--color-ink)}
.mobile-nav-languages{padding-top:.6rem;margin-top:.45rem;border-top:1px solid var(--color-line)}
.nav-veil{
  position:fixed;
  inset:var(--header-height) 0 0;
  z-index:45;
  display:none;
  border:0;
  background:var(--color-shadow);
}
.nav-veil.open{display:block}
.site-footer{
  padding-top:64px;
  border-top:1px solid var(--color-line);
  background:var(--color-surface);
}
.footer-grid{
  display:grid;
  grid-template-columns:1.3fr 1fr 1fr .8fr;
  gap:2.5rem;
  padding-bottom:48px;
}
.footer-brand p{max-width:30rem;color:var(--color-ink-soft)}
.footer-title{margin-bottom:1rem;font-size:.83rem;letter-spacing:.08em}
.footer-links{display:grid;gap:.55rem}
.footer-links a{
  min-height:28px;
  color:var(--color-ink-soft);
  font-size:.88rem;
}
.footer-links a:hover{color:var(--color-accent)}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  gap:1rem;
  padding-top:1.25rem;
  padding-bottom:1.25rem;
  border-top:1px solid var(--color-line);
  color:var(--color-ink-soft);
  font-size:.8rem;
}
.prose{max-width:var(--line-readable)}
.prose h2{margin-top:2.4em}
.prose h3{margin-top:1.8em}
.prose a{color:var(--color-accent);text-decoration:underline;text-underline-offset:.18em}
.prose img{border-radius:var(--radius-card)}
.prose blockquote{margin-inline:0}
@media(max-width:1120px){
  .main-nav{display:none}
  .menu-toggle{display:inline-flex}
  .head-tools{margin-left:auto}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media(max-width:768px){
  :root{--gutter:20px;--section-space:70px}
  h1{font-size:clamp(1.75rem,9vw,2.5rem);line-height:1.12;letter-spacing:-.01em}
  h2{font-size:clamp(1.65rem,7vw,2.15rem)}
  .grid-3,.grid-4{grid-template-columns:repeat(2,minmax(0,1fr))}
  .lang-control{display:none}
  .hero{min-height:auto}
}
@media(max-width:640px){
  :root{--gutter:16px;--section-space:56px}
  .grid-2,.grid-3,.grid-4{grid-template-columns:1fr}
  .button-row .btn{width:100%}
  .brand-local{display:none}
  .btn-login{padding-inline:.82rem}
  .mobile-nav{right:var(--gutter);left:var(--gutter)}
  .footer-grid{grid-template-columns:1fr;gap:1.8rem}
  .footer-bottom{display:block}
  .footer-bottom>*+*{margin-top:.65rem}
  .tilt,[class*="tilt-"]{transform:none}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}
  .reveal,.reveal.pending{opacity:1;transform:none}
  .btn:hover{transform:none}
}