:root {
  --bg:#FAFAFB;
  --bg-panel:#FFFFFF;
  --bg-panel-2:#F2F1F5;
  --bg-deep:#16141B;
  --border:#E6E4EB;
  --border-faint:#EFEEF3;
  --border-lit:#F4F3F7;
  --border-strong:#D3D0DA;
  --accent:#EC3E7A;
  --accent-dark:#B8235A;
  --sunset:#FF7A45;
  --text:#17151C;
  --text-muted:#5E5A66;
  --text-soft:#8A8693;
  --success:#1FA463;
  --warn:#D9931A;
  --error:#D93A3A;
  --sky:#3D9AD9;
  --lime:#9CC43A;
  --tint-green:#E3F5EB;
  --deep-green:#12693E;
  --edge-green:#C4EAD4;
  --tint-sky:#E2EFFA;
  --deep-sky:#1A5E93;
  --edge-sky:#C6DFF3;
  --tint-amber:#FBF0D5;
  --deep-amber:#7A5108;
  --edge-amber:#F1DCA4;
  --tint-rose:#FDE7EF;
  --deep-rose:#B8235A;
  --edge-rose:#F7C6D7;
  --flag-red:#D8283A;
  --flag-navy:#2C3270;
  --flag-gold:#F4C21B;
  --flag-black:#17151C;
  --flag-white:#FFFFFF;
  --clear:transparent;
  --glow-peach:rgba(255,146,108,.10);
  --glow-fade:rgba(255,146,108,0);
  --spark-halo:rgba(236,62,122,.18);
  --deep-dot:rgba(255,255,255,.04);
  --deep-rule:rgba(255,255,255,.18);
  --deep-muted:#C6C2CF;
  --veil:rgba(23,21,28,.32);
  --shadow-card:0 18px 40px rgba(236,62,122,.10),0 2px 6px rgba(23,21,28,.04);
  --shadow-soft:0 10px 26px rgba(236,62,122,.10),0 1px 3px rgba(23,21,28,.05);
  --shadow-ink:0 8px 20px rgba(23,21,28,.18);
  --hl-in:inset 0 -1px 0 var(--bg-panel-2),inset 0 1px 0 var(--bg-panel);
  --grad-hot:linear-gradient(90deg,var(--accent) 0%,var(--sunset) 100%);
  --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;
  --weight-regular:400;
  --weight-medium:500;
  --weight-semibold:600;
  --weight-bold:700;
  --r-card:20px;
  --r-canvas:24px;
  --r-pill:999px;
  --r-round:50%;
  --r-tag:7px;
  --r-small:2px;
  --gutter:24px;
  --wrap:1200px;
  --header-height:72px;
  --anchor-offset:88px;
  --toc-offset:152px;
  --ease:ease;
  --fast:.2s;
}
*,*::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;text-rendering:optimizeLegibility}
a {color:inherit;text-decoration:none}
button,input,select,textarea {font:inherit}
button {cursor:pointer;color:inherit}
button,fieldset {margin:0}
button {border:0}
img {max-width:100%;height:auto;display:block}
svg {display:block;flex-shrink:0}
h1,h2,h3,h4,p {margin:0}
h1,h2,h3 {font-family:var(--font-display);text-wrap:balance;overflow-wrap:break-word}
h1 {font-size:clamp(52px,5vw,68px);line-height:1.1;font-weight:var(--weight-bold);letter-spacing:-.02em}
h2 {font-size:clamp(28px,3vw,40px);line-height:1.25;letter-spacing:-.02em}
h3 {font-size:22px;line-height:1.35}
ul,ol {padding-left:1.5em}
a,button,summary {touch-action:manipulation}
:where(a,button,summary,input,select,textarea,[tabindex]):focus-visible {outline:2px solid var(--accent);outline-offset:3px;border-radius:var(--r-tag)}
[hidden] {display:none!important}
.no-break {white-space:nowrap}
.wrap {width:100%;max-width:var(--wrap);margin-inline:auto;padding-inline:var(--gutter)}
.section {padding-top:80px;padding-bottom:80px}
.section-head {max-width:760px;margin-bottom:32px}
.section-head p {margin-top:16px;color:var(--text-muted)}
.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))}
.stack>*+* {margin-top:24px}
.muted {color:var(--text-muted)}
.mono {font-family:var(--font-mono)}
.small {font-size:14px}
.icon {width:24px;height:24px;flex-shrink:0}
.no-list {list-style:none;margin:0;padding:0}
.flow-links {display:flex;flex-wrap:wrap;gap:12px}
.flow-links a {display:inline-flex;align-items:center;min-height:32px}
.prose {max-width:860px;min-width:0;overflow-wrap:break-word}
.prose p,.prose ul,.prose ol,.prose pre,.prose blockquote {margin-block:20px}
.prose h2 {margin-block:48px 20px}
.prose h3 {margin-block:32px 16px}
.prose a {color:var(--accent-dark);text-decoration:underline;text-underline-offset:3px}
code {font-family:var(--font-mono);font-size:.9em;overflow-wrap:anywhere}
:not(pre)>code {background:var(--bg-panel-2);padding:2px 5px;border-radius:var(--r-tag)}
pre {max-width:100%;overflow-x:auto;padding:24px;background:var(--bg-panel-2);border:1px solid var(--border);border-radius:var(--r-card)}
pre code {white-space:pre;overflow-wrap:normal}
.panel,.card {min-width:0;padding:28px;background:var(--bg-panel);border:1px solid var(--border);border-top-color:var(--border-lit);border-radius:var(--r-card);box-shadow:var(--shadow-card),var(--hl-in)}
.panel--inset {background:var(--bg-panel-2);box-shadow:none}
.decorated {position:relative;overflow-x:clip}
.btn,.btn-primary,.btn-secondary,.btn-ink,.btn-line,.btn-login {display:inline-flex;align-items:center;justify-content:center;gap:8px;flex-shrink:0;min-height:46px;padding:10px 22px;border-radius:var(--r-pill);font-size:15.5px;font-weight:var(--weight-semibold);white-space:nowrap;transition:transform var(--fast) var(--ease),background-color var(--fast) var(--ease)}
.btn,.btn-primary,.btn-ink,.btn-login {background:var(--text);color:var(--bg-panel);box-shadow:var(--shadow-ink)}
.btn-secondary,.btn-line {border:1.5px solid var(--text);background:var(--bg-panel);color:var(--text)}
.btn:hover,.btn-primary:hover,.btn-ink:hover,.btn-login:hover {transform:translateY(-1px)}
.btn-secondary:hover,.btn-line:hover {background:var(--bg-panel-2)}
.btn:active,.btn-primary:active,.btn-ink:active {transform:translateY(0)}
.btn:disabled,.btn[aria-disabled="true"] {background:var(--bg-panel-2);color:var(--text-muted);box-shadow:none;cursor:not-allowed;transform:none}
.btn--hover {transform:translateY(-1px)}
.btn--focus {outline:2px solid var(--accent);outline-offset:3px}
.topbar {position:relative;z-index:50;background:var(--bg);border-bottom:1px solid var(--border-faint)}
.topbar__in {max-width:1376px;height:var(--header-height);margin:0 auto;padding:0 32px;display:flex;align-items:center;gap:40px;flex-wrap:nowrap}
.brand {display:flex;align-items:center;gap:10px;flex:none}
.brand__mark {width:32px;height:32px;border-radius:var(--r-round);box-shadow:var(--shadow-soft);flex-shrink:0}
.brand__word {font-family:var(--font-display);font-weight:var(--weight-bold);font-size:19px;letter-spacing:-.02em;color:var(--text);white-space:nowrap}
.tabs {flex:1;min-width:0;align-self:stretch}
.tabs ul {display:flex;align-items:center;list-style:none;margin:0;padding:0;height:100%;gap:2px}
.tabs li {height:100%;flex-shrink:0}
.tabs a {position:relative;display:flex;align-items:center;height:100%;padding:0 14px;font-size:14.5px;font-weight:var(--weight-medium);color:var(--text-muted);white-space:nowrap;transition:color var(--fast) var(--ease)}
.tabs a::after {content:"";position:absolute;left:14px;right:14px;bottom:-1px;height:2px;border-radius:var(--r-small);background:var(--grad-hot);transform:scaleX(0);transform-origin:left center;transition:transform .3s var(--ease)}
.tabs a:hover {color:var(--text)}
.tabs a:hover::after {transform:scaleX(.42)}
.tabs a.is-on {color:var(--text);font-weight:var(--weight-semibold)}
.tabs a.is-on::after {transform:scaleX(1)}
.topbar__end {display:flex;align-items:center;gap:8px;flex-shrink:0;margin-left:auto}
.lang-wrap {position:relative}
.lang {display:flex;align-items:center;justify-content:center;gap:6px;min-width:44px;width:auto;height:40px;padding:0 12px;border-radius:var(--r-pill);border:0;background:var(--clear);font-size:14px;color:var(--text-muted);transition:background-color var(--fast) var(--ease)}
.lang:hover {background:var(--bg-panel-2)}
.lang__text {white-space:nowrap}
.lang__caret {font-size:11px;color:var(--text-soft)}
.lang-panel {position:absolute;right:0;top:calc(100% + 12px);z-index:80;min-width:180px;padding:8px;background:var(--bg-panel);border:1px solid var(--border);border-radius:var(--r-card);box-shadow:var(--shadow-card)}
.lang-panel a {display:flex;align-items:center;min-height:44px;padding:8px 14px;border-radius:var(--r-tag)}
.lang-panel a:hover,.lang-panel a[aria-current] {background:var(--bg-panel-2);color:var(--accent-dark)}
.btn-login {height:40px;min-height:40px;padding:0 22px;font-size:14.5px}
.menu-toggle {display:none;min-width:44px;min-height:44px;align-items:center;justify-content:center;background:var(--bg-panel-2);border-radius:var(--r-pill)}
.menu-toggle svg {width:22px;height:22px}
.drawer {position:fixed;top:var(--header-height);right:0;left:0;z-index:45;height:calc(100dvh - var(--header-height));max-height:calc(100dvh - var(--header-height));overflow-y:auto;overscroll-behavior:contain;background:var(--bg-panel);padding:16px var(--gutter) 32px;border-top:1px solid var(--border)}
.drawer a {display:flex;align-items:center;width:100%;min-height:48px;padding:12px 16px;border-bottom:1px solid var(--border-faint)}
.drawer a.is-on {color:var(--accent-dark);background:var(--tint-rose)}
.drawer__languages {margin-top:20px;border-top:1px solid var(--border)}
.menu-veil {position:fixed;inset:var(--header-height) 0 0;z-index:40;background:var(--veil);border:0;width:100%}
html.nav-open {overflow:hidden}
.site-footer {border-top:1px solid var(--border);background:var(--bg-panel-2)}
.footer-grid {display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:48px;padding-top:56px;padding-bottom:40px}
.footer-brand p {max-width:340px;margin-top:20px;color:var(--text-muted)}
.footer-title {font-size:16px;font-weight:var(--weight-semibold);margin-bottom:12px}
.footer-links {list-style:none;margin:0;padding:0;display:grid;gap:4px}
.footer-links a {display:inline-flex;align-items:center;min-height:32px;color:var(--text-muted)}
.footer-links a:hover {color:var(--accent-dark)}
.footer-languages {display:flex;flex-wrap:wrap;gap:8px 20px;padding-block:20px;border-top:1px solid var(--border)}
.footer-languages a {display:inline-flex;align-items:center;min-height:32px}
.footer-languages a[aria-current] {color:var(--accent-dark)}
.footer-bottom {display:flex;flex-wrap:wrap;justify-content:space-between;gap:16px;padding-block:24px;border-top:1px solid var(--border);color:var(--text-muted);font-size:14px}
.footer-bottom a {display:inline-flex;align-items:center;min-height:24px}
.reveal {transition:opacity .35s var(--ease),transform .35s var(--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>* {min-width:0;max-width:100%}
#server-status+* {margin-top:24px}
@media (max-width:1280px) {
  .topbar__in {gap:24px;padding-inline:24px}
  .tabs a {padding-inline:10px;font-size:13.5px}
  .tabs a::after {left:10px;right:10px}
}
@media (min-width:961px) {
  .drawer,.menu-veil {display:none!important}
}
@media (max-width:960px) {
  .topbar__in {gap:12px;padding-inline:20px}
  .topbar__in>.tabs {display:none}
  .topbar__end {margin-left:auto}
  .menu-toggle {display:inline-flex}
  .footer-grid {grid-template-columns:1fr 1fr;gap:32px}
  .footer-brand {grid-column:1/-1}
  .grid--five {grid-template-columns:repeat(3,minmax(0,1fr))}
}
@media (max-width:768px) {
  h1 {font-size:40px}
  .section {padding-top:48px;padding-bottom:48px}
  .grid--three {grid-template-columns:1fr}
  .lang__text {display:none}
  .panel,.card {padding:24px}
}
@media (max-width:640px) {
  :root {--gutter:16px;--header-height:64px;--anchor-offset:80px;--toc-offset:140px}
  .no-break {white-space:normal}
  .tilt,[data-tilt] {transform:none}
  .decorated {max-width:100%}
  .topbar__in {padding-inline:16px;gap:8px}
  .topbar__end {gap:4px}
  .brand {gap:7px}
  .brand__word {font-size:17px}
  .brand__mark {width:28px;height:28px}
  .lang {padding-inline:8px}
  .btn-login {padding-inline:14px;font-size:14px}
  .footer-grid {grid-template-columns:1fr;gap:28px}
  .footer-brand {grid-column:auto}
  .grid--five {grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:360px) {
  .topbar__in {padding-inline:16px;gap:4px}
  .brand__word {font-size:16px}
  .brand__mark {width:26px;height:26px}
  .btn-login {padding-inline:12px}
}
@media (prefers-reduced-motion:reduce) {
  html {scroll-behavior:auto}
  .reveal,.reveal.pending {opacity:1;transform:none;transition:none}
  *,*::before,*::after {animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}
}