:root{
  --bg:#f3f7fb;
  --surface:#ffffff;
  --surface-2:#f8fbfe;
  --surface-3:#eef4fa;
  --line:#d6e0ec;
  --line-strong:#bcc9d8;
  --text:#516176;
  --heading:#0b1628;
  --accent:#0d9488;
  --accent-strong:#0f766e;
  --accent-soft:#e7f8f5;
  --good:#15803d;
  --good-soft:#edfdf3;
  --bad:#c2413b;
  --bad-soft:#fff3f2;
  --warn:#b45309;
  --warn-soft:#fff8ed;
  --shadow:0 24px 72px rgba(7,18,36,.07);
  --radius:32px;
  --container:1260px;
}
html[data-theme="dark"]{
  --bg:#07111e;
  --surface:#0c1828;
  --surface-2:#0a1523;
  --surface-3:#112236;
  --line:#22354d;
  --line-strong:#365170;
  --text:#aec1d6;
  --heading:#f5f9ff;
  --accent:#22c7b8;
  --accent-strong:#7ce7db;
  --accent-soft:#0d2d31;
  --good:#59d98a;
  --good-soft:#0f2c1c;
  --bad:#f6a5ac;
  --bad-soft:#31151a;
  --warn:#f2c14d;
  --warn-soft:#2d230d;
  --shadow:0 24px 72px rgba(0,0,0,.28);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  min-width:320px;
  font-family:Inter,"IBM Plex Sans",ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Arial,sans-serif;
  color:var(--text);
  background:
    radial-gradient(circle at top, color-mix(in srgb,var(--accent) 7%, transparent) 0, transparent 34%),
    var(--bg);
  line-height:1.82;
  letter-spacing:-.005em;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  font-feature-settings:"cv02" 1,"cv03" 1,"cv04" 1,"cv11" 1;
}
a{color:inherit;text-decoration:none}
a:not(.btn):not(.btn-secondary):not(.ghost-btn):not(.mini-btn):not(.mini-link):not(.nav-link):not(.brand):not(.row-arrow):not(.theme-toggle):not(.expand-btn){text-decoration-thickness:1px;text-underline-offset:.18em}
img{display:block;max-width:100%}
button,input,textarea,select{font:inherit}
button{cursor:pointer}
.container{width:min(calc(100% - 40px),var(--container));margin:0 auto}
.site-header{
  position:sticky;top:0;z-index:40;
  background:color-mix(in srgb,var(--bg) 88%, transparent);
  backdrop-filter:blur(14px);
  border-bottom:1px solid color-mix(in srgb,var(--line) 86%, transparent);
}
.header-inner{
  min-height:76px;
  display:flex;align-items:center;justify-content:space-between;gap:24px;
}
.brand{display:flex;align-items:center;gap:14px;min-width:0}
.brand-badge{
  width:40px;height:40px;border-radius:14px;overflow:hidden;flex:0 0 auto;
  border:1px solid color-mix(in srgb,var(--line) 92%, transparent);
  box-shadow:0 8px 26px rgba(15,155,156,.14);
}
.brand-copy{display:grid;gap:2px;min-width:0}
.brand-name{font-size:1rem;font-weight:850;color:var(--heading);letter-spacing:-.04em;line-height:1;white-space:nowrap}
.brand-tag{font-size:.8rem;line-height:1.2;white-space:nowrap}
.header-nav{display:flex;align-items:center;gap:10px;flex-wrap:wrap;justify-content:flex-end}
.nav-link,.theme-toggle{
  min-height:40px;padding:0 14px;border:1px solid transparent;border-radius:999px;
  display:inline-flex;align-items:center;justify-content:center;font-size:.95rem;font-weight:760;
  color:var(--heading);transition:background-color .18s ease,border-color .18s ease,transform .18s ease,color .18s ease;
}
.nav-link:hover,.theme-toggle:hover,.mini-link:hover,.expand-btn:hover,.ghost-btn:hover,.mini-btn:hover{background:var(--surface);border-color:var(--line)}
.nav-link[aria-current="page"]{background:var(--surface);border-color:var(--line);box-shadow:var(--shadow)}
.theme-toggle{width:40px;padding:0;background:transparent}
.theme-toggle svg{width:18px;height:18px}
.site-main{padding:46px 0 116px}
.home-shell{display:grid;gap:56px}
.hero-compact,.page-head{display:grid;gap:22px;width:100%}
.hero-compact{padding-top:10px}
.page-head{padding-bottom:18px}
.kicker{
  display:inline-flex;align-items:center;gap:8px;width:max-content;min-height:30px;
  padding:0 12px;border-radius:999px;background:var(--accent-soft);
  color:var(--accent-strong);font-size:.76rem;font-weight:850;letter-spacing:.07em;text-transform:uppercase;
}
h1,h2,h3{margin:0;color:var(--heading);line-height:1.04}
h1{font-size:clamp(2.75rem,5.4vw,5.2rem);font-weight:860;letter-spacing:-.066em;max-width:15ch}
h2{font-size:clamp(1.9rem,3.2vw,2.8rem);font-weight:835;letter-spacing:-.048em}
h3{font-size:1.16rem;font-weight:790;letter-spacing:-.028em;line-height:1.24}
p{margin:0}
.hero-compact p,.page-head p,.article p,.link-row p,.faq-item p,.footer-copy span{font-size:1.05rem;line-height:1.94}
.hero-compact p,.page-head p{max-width:72ch}
.mini-links,.footer-links{display:flex;flex-wrap:wrap;gap:14px 16px}
.mini-link{
  display:inline-flex;align-items:center;justify-content:center;text-align:center;min-height:44px;padding:0 18px;
  border:1px solid var(--line);border-radius:999px;background:transparent;color:var(--heading);
  font-size:.93rem;font-weight:760;transition:background-color .18s ease,border-color .18s ease,transform .18s ease,color .18s ease,box-shadow .18s ease;
  white-space:nowrap;flex:0 0 auto;
}
.mini-link[aria-current="page"]{background:color-mix(in srgb,var(--accent-soft) 72%, var(--surface));border-color:color-mix(in srgb,var(--accent) 28%, var(--line));box-shadow:0 10px 24px rgba(7,18,36,.08);color:var(--heading)}
.btn,.btn-secondary,.ghost-btn,.mini-btn,.expand-btn{
  min-height:48px;border-radius:16px;border:1px solid transparent;padding:0 18px;
  transition:background-color .18s ease,border-color .18s ease,transform .18s ease,color .18s ease,box-shadow .18s ease;
  font-weight:820;letter-spacing:-.025em;
}
.btn,.btn-secondary{background:var(--accent);color:#fff;box-shadow:0 14px 28px rgba(15,155,156,.2)}
.ghost-btn,.mini-btn,.expand-btn{background:transparent;color:var(--heading);border-color:var(--line)}
.mini-btn{min-height:40px;padding:0 14px;font-size:.92rem}
.expand-btn{min-height:40px;padding:0 14px;font-size:.9rem}
.btn:hover:not(:disabled),.btn-secondary:hover:not(:disabled),.ghost-btn:hover:not(:disabled),.mini-btn:hover:not(:disabled),.expand-btn:hover:not(:disabled),.nav-link:hover,.theme-toggle:hover,.mini-link:hover{transform:translateY(-1px)}
.panel{
  background:linear-gradient(180deg,color-mix(in srgb,var(--surface) 96%, transparent),var(--surface));
  border:1px solid var(--line);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
}
.section{margin-top:96px}
.workbench-shell{overflow:hidden}
.workbench-header{
  display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:20px 28px;border-bottom:1px solid var(--line);background:color-mix(in srgb,var(--surface-2) 74%, transparent);
}
.workbench-title{display:flex;align-items:center;gap:12px;font-size:1rem;font-weight:830;color:var(--heading);letter-spacing:-.03em}
.workbench-header-actions{display:flex;align-items:center;gap:12px;flex-wrap:wrap;justify-content:flex-end}
.notice-inline{font-size:.9rem;white-space:nowrap}
.workbench-body{padding:28px}
.workbench-actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:26px}
.editor-grid,.compare-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:26px}
.editor-card{display:grid;gap:14px;min-width:0}
.editor-label{display:flex;align-items:center;justify-content:space-between;gap:12px;color:var(--heading);font-size:.98rem;font-weight:820;flex-wrap:wrap}
.helper{font-size:.92rem;color:var(--text);overflow-wrap:anywhere}
.text-input,textarea{
  width:100%;border:1px solid var(--line);border-radius:22px;background:var(--surface-2);
  color:var(--heading);outline:none;transition:border-color .18s ease,box-shadow .18s ease,background-color .18s ease;
}
.text-input{min-height:46px;padding:0 16px}
.code-editor{
  min-height:420px;padding:18px;resize:vertical;
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  font-size:.95rem;line-height:1.68;tab-size:2;
}
.code-editor[readonly]{background:color-mix(in srgb,var(--surface-2) 94%, var(--surface))}
.text-input:focus,.code-editor:focus{border-color:color-mix(in srgb,var(--accent) 38%, var(--line));box-shadow:0 0 0 4px color-mix(in srgb,var(--accent) 16%, transparent)}
.status{display:none;margin-top:18px;padding:16px 18px;border-radius:18px;border:1px solid var(--line);font-weight:760;line-height:1.7;overflow-wrap:anywhere}
.status.is-visible{display:block}
.status.is-success{background:var(--good-soft);border-color:color-mix(in srgb,var(--good) 36%, var(--line));color:var(--heading)}
.status.is-error{background:var(--bad-soft);border-color:color-mix(in srgb,var(--bad) 36%, var(--line));color:var(--heading)}
.status.is-warning{background:var(--warn-soft);border-color:color-mix(in srgb,var(--warn) 36%, var(--line));color:var(--heading)}
.meta-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:18px}
.meta-badge{display:inline-flex;align-items:center;min-height:36px;padding:0 12px;border-radius:999px;background:transparent;border:1px solid var(--line);color:var(--heading);font-size:.88rem;font-weight:780}
.tree-card,.compare-result{
  margin-top:18px;padding:18px 18px 20px;border-radius:24px;border:1px solid var(--line);background:var(--surface-2);
  max-height:430px;overflow:auto;
}
.tree-root,.tree-root ul{list-style:none;margin:0;padding-left:18px}
.tree-root{padding-left:0}
.tree-node{margin:8px 0}
.tree-node details{padding-left:12px;border-left:1px solid var(--line)}
.tree-node summary{cursor:pointer;color:var(--heading);font-weight:720}
.tree-key{color:var(--accent-strong)}
.tree-type{margin-left:6px;font-size:.88rem}
.tree-leaf{display:flex;flex-wrap:wrap;gap:6px;align-items:baseline;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}
.tree-value-string{color:#0d9488}
.tree-value-number{color:#7c3aed}
.tree-value-boolean{color:#b45309}
.tree-value-null{color:#6b7280}
.breadcrumbs{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:28px;font-size:.95rem;align-items:center;overflow-wrap:anywhere}
.breadcrumbs span{opacity:.65}
.tool-rail{display:grid;gap:16px;margin:18px 0 42px}
.workbench-shell + .tool-rail{margin-top:30px}
.rail-label{font-size:.82rem;font-weight:800;letter-spacing:.08em;text-transform:uppercase;color:var(--heading);opacity:.82;padding-left:2px}
.article{display:grid;gap:0;max-width:980px;margin-left:auto;margin-right:auto}
.article section{
  padding:58px 0 62px;background:transparent;border:0;border-top:1px solid color-mix(in srgb,var(--line) 94%, transparent);border-radius:0;
}
.article section:first-child{padding-top:20px;border-top:0}
.article section h2{margin-bottom:22px}
.article section h3{margin:36px 0 14px}
.article section p,.article section li{max-width:76ch}
.article section p + p,.article section ul,.article section ol{margin-top:18px}
.article ul,.article ol{padding-left:22px}
.article li + li{margin-top:8px}
.link-list{display:grid;gap:0}
.link-row{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:22px;align-items:start;padding:34px 0;border-top:1px solid var(--line)}
.link-row:first-child{border-top:0}
.link-row > div{display:grid;gap:8px}
.link-row strong{color:var(--heading);font-size:1.14rem;letter-spacing:-.035em}
.row-arrow{display:inline-flex;align-items:center;justify-content:center;width:38px;height:38px;border:1px solid var(--line);border-radius:999px;color:var(--accent-strong);font-weight:900;transition:transform .18s ease,background-color .18s ease,border-color .18s ease}
.link-row:hover .row-arrow{transform:translateX(2px);background:var(--surface);border-color:var(--line-strong)}
.compare-result code,.meta-badge code{background:var(--surface);border:1px solid var(--line);padding:2px 7px;border-radius:999px}
.diff-list{margin:14px 0 0;padding-left:20px}
.home-faq,.faq-stack{display:grid;gap:0}
.faq-item{padding:30px 0;border-top:1px solid var(--line)}
.faq-item:first-child{border-top:0}
.faq-item summary{list-style:none;cursor:pointer;color:var(--heading);font-weight:820;display:flex;align-items:flex-start;justify-content:space-between;gap:16px;line-height:1.45}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:'+';color:var(--accent-strong);font-size:1.15rem;line-height:1}
.faq-item[open] summary::after{content:'−'}
.faq-item p{margin-top:16px;max-width:74ch}
.faq-intro{display:grid;gap:20px;max-width:80ch}
.faq-grid{display:grid;gap:28px}
.faq-section-title{font-size:1.3rem;font-weight:820;color:var(--heading);letter-spacing:-.03em;margin:0 0 6px}
.faq-section-copy{max-width:72ch}
.faq-links{display:grid;gap:0;margin-top:12px}
.faq-links .link-row strong{font-size:1.06rem}
.site-footer{margin-top:104px;padding:48px 0 62px;border-top:1px solid var(--line)}
.footer-inner{display:grid;gap:20px}
.footer-copy strong{display:block;color:var(--heading);margin-bottom:8px;font-size:1.02rem;letter-spacing:-.03em}
.footer-links a{font-size:.94rem;color:var(--heading);overflow-wrap:anywhere}
.footer-links a:hover{text-decoration:underline}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
:focus-visible{outline:3px solid color-mix(in srgb,var(--accent) 68%, white 32%);outline-offset:2px}
body.is-expanded{overflow:hidden}
@media (min-width:980px){
  [data-expandable].is-expanded{position:fixed;inset:0;z-index:80;border-radius:0;border:0;margin:0;background:var(--bg)}
  [data-expandable].is-expanded .workbench-header{padding:18px 28px}
  [data-expandable].is-expanded .workbench-body{padding:24px 28px 28px;height:calc(100vh - 78px);overflow:auto}
  [data-expandable].is-expanded .editor-grid,[data-expandable].is-expanded .compare-grid{align-items:stretch}
  [data-expandable].is-expanded .code-editor{min-height:calc(100vh - 340px)}
}
@media (max-width:979px){
  .expand-btn{display:none}
}
@media (max-width:900px){
  .header-inner{display:grid;grid-template-columns:minmax(0,1fr) auto;align-items:center;padding:12px 0}
  .header-nav{grid-column:1/-1;overflow:auto;flex-wrap:nowrap;justify-content:flex-start;padding-bottom:2px;-ms-overflow-style:none;scrollbar-width:none}
  .header-nav::-webkit-scrollbar,.mini-links::-webkit-scrollbar{display:none}
}
@media (max-width:860px){
  .editor-grid,.compare-grid{grid-template-columns:1fr}
  .container{width:min(calc(100% - 26px),var(--container))}
}
@media (max-width:760px){
  .site-main{padding:26px 0 72px}
  .home-shell{gap:36px}
  .section{margin-top:60px}
  h1{font-size:clamp(2.05rem,10vw,3.2rem);max-width:none;line-height:1.06}
  h2{font-size:clamp(1.55rem,7vw,2.1rem);line-height:1.1}
  .hero-compact,.page-head{gap:16px}
  .page-head{padding-bottom:10px}
  .hero-compact p,.page-head p,.article p,.link-row p,.faq-item p,.footer-copy span{font-size:.98rem;line-height:1.78}
  .tool-rail{margin:16px 0 30px;gap:12px}
  .workbench-shell + .tool-rail{margin-top:24px}
  .rail-label{padding-left:0}
  .workbench-shell,.panel{border-radius:24px}
  .workbench-header{align-items:flex-start;flex-direction:column;padding:16px 16px 14px;gap:12px}
  .workbench-title{flex-wrap:wrap;row-gap:8px}
  .workbench-header-actions{width:100%;justify-content:space-between;gap:10px}
  .notice-inline{white-space:normal;max-width:30ch}
  .workbench-body{padding:16px}
  .workbench-actions{display:grid;grid-template-columns:1fr;gap:9px;margin-bottom:18px}
  .workbench-actions > *{width:100%;padding-inline:14px}
  .code-editor{min-height:230px;padding:14px;font-size:.93rem;line-height:1.58}
  .tree-card,.compare-result{max-height:none;padding:16px;border-radius:18px}
  .editor-label{align-items:flex-start;gap:6px}
  .header-nav{gap:8px}
  .nav-link,.theme-toggle{min-height:38px;padding:0 12px;font-size:.9rem}
  .mini-links{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;overflow:visible;padding:0;scroll-snap-type:none}
  .mini-link{min-height:42px;padding:10px 14px;font-size:.9rem;white-space:normal;line-height:1.35;scroll-snap-align:none}
  .link-row{grid-template-columns:1fr;gap:14px;padding:22px 0}
  .row-arrow{width:34px;height:34px}
  .article section{padding:34px 0 36px}
  .faq-grid{gap:18px}
  .faq-section-title{font-size:1.14rem}
  .faq-item{padding:16px 0}
  .faq-item summary{font-size:1rem;line-height:1.42;align-items:flex-start}
  .site-footer{margin-top:72px;padding:38px 0 42px}
  .footer-links{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px 14px}
}
@media (max-width:560px){
  .container{width:min(calc(100% - 20px),var(--container))}
  .header-inner{padding:10px 0;gap:10px}
  .brand-copy{gap:1px}
  .brand-name{font-size:.94rem}
  .brand-tag{display:none}
  .breadcrumbs{margin-bottom:18px;font-size:.88rem;gap:6px}
  .mini-links,.footer-links{grid-template-columns:1fr}
  .mini-link{min-height:40px;padding:10px 12px}
  .workbench-body{padding:14px}
  .code-editor{min-height:210px;padding:13px;font-size:.92rem}
}

.nav-link[aria-current="page"],.theme-toggle:focus-visible,.mini-link:focus-visible{border-color:color-mix(in srgb,var(--accent) 30%, var(--line));background:color-mix(in srgb,var(--accent-soft) 62%, var(--surface));box-shadow:0 12px 28px rgba(7,18,36,.08)}
.breadcrumbs a{color:var(--heading)}
.breadcrumbs a:hover{text-decoration:underline}
.header-nav{gap:12px}
.footer-links{gap:14px 18px}
.footer-links a{font-size:.95rem;color:var(--heading)}
@media (max-width:900px){
  .header-nav{padding-bottom:4px;scroll-snap-type:x proximity;-webkit-overflow-scrolling:touch}
  .header-nav > *{scroll-snap-align:start}
}
@media (max-width:560px){
  .container{width:min(calc(100% - 24px),var(--container))}
  .breadcrumbs{margin-bottom:22px}
}

.link-row,.faq-item summary,.faq-item p,.footer-links a,.nav-link,.mini-link{overflow-wrap:anywhere}
@media (max-width:900px){
  .site-header{backdrop-filter:blur(10px)}
  .header-nav{padding-bottom:2px}
}


/* Mobile header menu */
.header-inner{position:relative}
.menu-toggle{
  display:none;
  min-height:42px;
  min-width:42px;
  padding:0;
  border:1px solid var(--line);
  border-radius:14px;
  background:color-mix(in srgb,var(--surface) 94%, transparent);
  color:var(--heading);
  align-items:center;
  justify-content:center;
  transition:background-color .18s ease,border-color .18s ease,transform .18s ease,box-shadow .18s ease;
}
.menu-toggle svg{width:19px;height:19px}
.menu-toggle:hover{transform:translateY(-1px);background:var(--surface);border-color:var(--line-strong)}
.menu-toggle .icon-close{display:none}
.menu-toggle[aria-expanded="true"] .icon-open{display:none}
.menu-toggle[aria-expanded="true"] .icon-close{display:block}

@media (max-width:900px){
  .nav-ready .header-inner{
    display:grid;
    grid-template-columns:minmax(0,1fr) auto;
    align-items:center;
    gap:12px;
    padding:12px 0;
  }
  .nav-ready .menu-toggle{display:inline-flex}
  .nav-ready .header-nav{
    display:none;
    position:absolute;
    left:0;
    right:0;
    top:calc(100% + 10px);
    z-index:45;
    padding:14px;
    border:1px solid var(--line);
    border-radius:22px;
    background:color-mix(in srgb,var(--surface) 98%, transparent);
    box-shadow:var(--shadow);
    backdrop-filter:blur(18px);
    overflow:visible;
  }
  .nav-ready .header-nav.is-open{display:grid;gap:10px}
  .nav-ready .nav-link,
  .nav-ready .theme-toggle{
    width:100%;
    min-height:46px;
    justify-content:flex-start;
    padding:0 14px;
    border-color:var(--line);
    border-radius:14px;
    background:transparent;
    box-shadow:none;
    white-space:normal;
  }
  .nav-ready .theme-toggle{justify-content:center}
  .nav-ready .header-nav > *{scroll-snap-align:none}
  body.menu-open{overflow:hidden}
}

@media (max-width:560px){
  .nav-ready .header-inner{padding:10px 0}
  .nav-ready .brand-badge{width:38px;height:38px;border-radius:13px}
  .nav-ready .brand-name{font-size:.92rem}
  .nav-ready .header-nav{top:calc(100% + 8px);padding:12px}
  .nav-ready .nav-link,
  .nav-ready .theme-toggle{min-height:44px;font-size:.95rem}
}