/* ============ 1. Reset ============ */
*,
*::before,
*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0}
h1,h2,h3,h4,h5,p,ul,ol,figure,blockquote{margin:0}
ul,ol{padding:0;list-style:none}
a{color:inherit;text-decoration:none;transition:color 140ms var(--ease),border-color 140ms var(--ease)}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
img,svg{display:block;max-width:100%}
table{border-collapse:collapse;width:100%}
:focus-visible{outline:2px solid var(--orange);outline-offset:3px;border-radius:6px}
::selection{background:var(--orange);color:var(--ink)}

/* ============ 2. Variables ============ */
:root{
  --night:#171029;
  --lamp:#2A1E4A;
  --lamp-hi:#312357;
  --purple:#5B3FD1;
  --purple-hi:#7A5BFF;
  --orange:#FF6B2C;
  --orange-soft:#FFB08A;
  --mint:#9DB4A0;
  --cream:#F7F3EA;
  --haze:#C9C2E0;
  --ink:#0E0A18;
  --font-body:system-ui,-apple-system,"Segoe UI","Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --font-mono:ui-monospace,"JetBrains Mono",SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;
  --shell:1200px;
  --gutter:clamp(16px,4vw,40px);
  --r-lg:28px;
  --r-md:18px;
  --r-sm:12px;
  --ease:cubic-bezier(.2,.7,.3,1);
  --t:150ms;
}

/* ============ 3. Base & typography ============ */
body{
  min-height:100vh;
  background-color:var(--night);
  background-image:
    radial-gradient(1180px 640px at 84% -12%,rgba(91,63,209,.34),transparent 70%),
    radial-gradient(860px 520px at 4% 6%,rgba(255,107,44,.10),transparent 72%);
  background-repeat:no-repeat;
  color:var(--cream);
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.75;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
}
.section{padding-block:clamp(40px,7vw,88px)}
.section[id],[data-section]{scroll-margin-top:110px}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--font-mono);font-size:11px;font-weight:500;
  letter-spacing:.16em;text-transform:uppercase;color:var(--mint);
}
.eyebrow::before{
  content:"";width:8px;height:8px;flex:0 0 auto;border-radius:2px;
  background:var(--orange);box-shadow:0 0 12px rgba(255,107,44,.7);
}
.section-title{
  font-weight:900;font-stretch:88%;font-size:clamp(26px,3.6vw,42px);
  line-height:1.04;letter-spacing:-.02em;color:var(--cream);text-wrap:balance;
}
.lede{
  font-size:clamp(16px,1.6vw,18px);line-height:1.8;
  color:rgba(247,243,234,.84);max-width:36em;
}
.prose{max-width:38rem;font-size:17px;line-height:1.8;color:rgba(247,243,234,.9)}
.prose>*+*{margin-top:1.1em}
.prose p{max-width:34em}
.prose h2{font-weight:900;font-stretch:88%;letter-spacing:-.01em;font-size:clamp(22px,2.4vw,28px);line-height:1.2;color:var(--cream)}
.prose h3{font-weight:700;font-size:18px;line-height:1.4;color:var(--cream)}
.prose ul{padding-left:0}
.prose li{position:relative;padding-left:20px}
.prose li+li{margin-top:.4em}
.prose li::before{content:"";position:absolute;left:2px;top:.72em;width:7px;height:7px;border-radius:2px;background:var(--mint)}
.prose a{color:var(--orange-soft);border-bottom:1px solid rgba(255,176,138,.45)}
.prose a:hover{color:var(--orange);border-bottom-color:var(--orange)}
.prose strong{color:var(--cream);font-weight:700}
.visually-hidden{
  position:absolute;width:1px;height:1px;margin:-1px;padding:0;
  overflow:hidden;clip:rect(0 0 0 0);clip-path:inset(50%);white-space:nowrap;border:0;
}

/* ============ 4. Layout ============ */
.shell{width:100%;max-width:var(--shell);margin-inline:auto;padding-inline:var(--gutter)}
.grid{display:grid;gap:clamp(16px,3vw,28px);align-items:start}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid--stagger>*:nth-child(even){margin-top:clamp(16px,3vw,44px)}

/* ============ 5. Buttons & tags ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  padding:13px 24px;border-radius:999px;border:1px solid transparent;
  font-size:15px;font-weight:800;line-height:1;letter-spacing:.01em;
  transition:background var(--t) var(--ease),color var(--t) var(--ease),
    border-color var(--t) var(--ease),transform 140ms var(--ease),box-shadow 140ms var(--ease);
}
.btn:active{transform:translateY(1px)}
.btn--primary{background:var(--orange);color:var(--ink);box-shadow:0 14px 30px -16px rgba(255,107,44,.95)}
.btn--primary:hover{background:#FF8348;box-shadow:0 18px 34px -14px rgba(255,107,44,.9)}
.btn--ghost{background:transparent;color:var(--cream);border-color:rgba(201,194,224,.34)}
.btn--ghost:hover{border-color:var(--orange);color:var(--orange-soft)}
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 11px;border-radius:999px;border:1px solid transparent;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;
  text-transform:uppercase;background:rgba(122,91,255,.18);color:var(--haze);
}
.tag--orange{background:rgba(255,107,44,.16);border-color:rgba(255,107,44,.42);color:var(--orange-soft)}
.tag--mint{background:rgba(157,180,160,.14);border-color:rgba(157,180,160,.38);color:var(--mint)}
.tag--solid{background:var(--orange);border-color:var(--orange);color:var(--ink);font-weight:700}
.index-node{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.08em;color:var(--mint);
}
.index-node::before{
  content:"";width:8px;height:8px;flex:0 0 auto;border-radius:2px;
  background:var(--mint);box-shadow:0 0 10px rgba(157,180,160,.65);
}
.index-node__num{color:var(--orange-soft);font-weight:700}

/* ============ 6. Breadcrumb ============ */
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;
  color:rgba(201,194,224,.72);
}
.breadcrumb__item{display:inline-flex;align-items:center;gap:8px}
.breadcrumb__item:not(:last-child)::after{content:"/";color:rgba(201,194,224,.34)}
.breadcrumb__item a:hover{color:var(--orange-soft)}
.breadcrumb__item[aria-current="page"]{color:var(--cream)}

/* ============ 7. Cards ============ */
.card{
  position:relative;display:flex;flex-direction:column;gap:12px;
  padding:clamp(18px,3vw,28px);border-radius:var(--r-md);
  background:var(--lamp);border:1px solid rgba(122,91,255,.28);
  transition:border-color 160ms var(--ease),background 160ms var(--ease),transform 160ms var(--ease);
}
.card:hover{border-color:var(--orange);background:var(--lamp-hi);transform:translateY(-2px)}
.card__title{font-size:20px;font-weight:800;line-height:1.3;color:var(--cream)}
.card__meta{
  display:flex;flex-wrap:wrap;gap:8px 14px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;color:var(--mint);
}

/* ============ 8. Media frames ============ */
.media-frame{
  position:relative;overflow:hidden;aspect-ratio:16/10;
  border-radius:var(--r-lg);border:1px solid rgba(122,91,255,.26);
  background:linear-gradient(150deg,#241A41,#120C20);
}
.media-frame__img{width:100%;height:100%;object-fit:cover}
.media-frame--slant{
  border-radius:var(--r-lg) var(--r-lg) 10px 10px;
  clip-path:polygon(0 0,100% 0,100% 100%,0 88%);
}
.media-frame__tag{position:absolute;left:14px;top:14px;z-index:2}

/* ============ 9. Table ============ */
.table-scroll{
  overflow-x:auto;-webkit-overflow-scrolling:touch;
  border:1px solid rgba(201,194,224,.14);border-radius:var(--r-md);
  background:rgba(14,10,24,.38);
}
.data-table{width:100%;min-width:460px;font-size:14px}
.data-table th,.data-table td{
  padding:11px 14px;text-align:left;vertical-align:middle;
  border-bottom:1px solid rgba(201,194,224,.1);
}
.data-table thead th{
  font-family:var(--font-mono);font-size:11px;font-weight:500;
  letter-spacing:.12em;text-transform:uppercase;color:var(--mint);
  background:rgba(14,10,24,.72);
}
.data-table td.num{
  font-family:var(--font-mono);letter-spacing:.03em;color:var(--cream);
  text-align:right;font-variant-numeric:tabular-nums;
}
.data-table tbody tr{transition:background 140ms var(--ease)}
.data-table tbody tr:hover{background:rgba(122,91,255,.14)}
.data-table tbody tr:last-child td{border-bottom:0}

/* ============ 10. Status rail ============ */
.status-rail{
  display:flex;flex-wrap:wrap;align-items:stretch;
  border:1px solid rgba(122,91,255,.32);border-radius:999px;
  background:rgba(14,10,24,.58);overflow:hidden;
}
.status-rail__item{
  display:inline-flex;align-items:center;gap:8px;
  padding:9px 16px;border-right:1px solid rgba(122,91,255,.22);
  font-family:var(--font-mono);font-size:12px;letter-spacing:.05em;color:var(--haze);
}
.status-rail__item:last-child{border-right:0}
.status-rail__item strong{color:var(--orange);font-weight:700}

/* ============ 11. TOC ============ */
.toc{
  position:sticky;top:96px;display:flex;flex-direction:column;gap:2px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.05em;
}
.toc-link{
  display:block;padding:8px 0 8px 16px;
  border-left:2px solid rgba(201,194,224,.16);
  color:rgba(201,194,224,.72);
  transition:color 140ms var(--ease),border-color 140ms var(--ease);
}
.toc-link:hover{color:var(--cream);border-left-color:var(--purple-hi)}
.toc-link[aria-current="true"]{
  color:var(--orange-soft);border-left-color:var(--orange);font-weight:600;
}

/* ============ 12. Header ============ */
.skip-link{
  position:fixed;left:16px;top:-140px;z-index:200;
  padding:10px 18px;border-radius:0 0 14px 14px;
  background:var(--orange);color:var(--ink);
  font-size:14px;font-weight:800;
  transition:top 140ms var(--ease);
}
.skip-link:focus-visible{top:0}
.site-header{
  position:sticky;top:0;z-index:80;
  background:var(--night);
  border-bottom:1px solid rgba(122,91,255,.18);
}
.header-top{
  overflow:hidden;max-height:74px;
  background:var(--ink);
  border-bottom:1px solid rgba(122,91,255,.16);
  transition:max-height 180ms var(--ease),opacity 160ms var(--ease),border-color 180ms var(--ease);
}
.site-header[data-condensed] .header-top{max-height:0;opacity:0;border-bottom-color:transparent}
.header-top__inner{
  display:flex;align-items:center;gap:clamp(12px,3vw,36px);
  min-height:46px;padding-block:6px;
}
.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto;color:var(--cream)}
.brand__mark{
  width:13px;height:22px;flex:0 0 auto;border-radius:999px;
  background:linear-gradient(180deg,var(--orange),var(--purple-hi));
  box-shadow:0 0 0 1px rgba(247,243,234,.14),0 0 18px rgba(255,107,44,.45);
  transition:box-shadow 160ms var(--ease),transform 160ms var(--ease);
}
.brand:hover .brand__mark{transform:translateY(-1px);box-shadow:0 0 0 1px rgba(247,243,234,.22),0 0 24px rgba(255,107,44,.8)}
.brand__name{font-size:16px;font-weight:800;letter-spacing:.02em;white-space:nowrap}
.brand--footer{margin-bottom:2px}
.brand--footer .brand__name{font-size:18px}
.header-tagline{
  font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;
  color:var(--haze);white-space:nowrap;
}
.header-meta{
  margin-left:auto;display:flex;align-items:center;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.05em;
  color:rgba(157,180,160,.92);white-space:nowrap;
}
.status-dot{
  display:inline-block;width:7px;height:7px;margin-right:8px;border-radius:2px;
  background:var(--mint);box-shadow:0 0 0 3px rgba(157,180,160,.16);
}
.header-bar{
  position:relative;
  background-color:var(--lamp);
  background-image:linear-gradient(100deg,rgba(91,63,209,.36),rgba(23,16,41,0) 62%);
  border-bottom:1px solid rgba(122,91,255,.26);
}
.header-bar__inner{
  display:flex;align-items:center;gap:clamp(12px,2vw,28px);
  min-height:62px;
}
.primary-nav{flex:1 1 auto;min-width:0}
.nav-list{
  display:flex;align-items:stretch;gap:clamp(4px,1.4vw,18px);
  overflow-x:auto;scrollbar-width:thin;
}
.nav-link{
  position:relative;display:inline-flex;align-items:baseline;gap:7px;
  padding:14px 2px 16px;
  font-size:15px;font-weight:500;color:var(--haze);white-space:nowrap;
  transition:color 140ms var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:10px;height:2px;
  background:var(--orange);transform:scaleX(0);transform-origin:left center;
  transition:transform 140ms var(--ease);
}
.nav-num{
  font-family:var(--font-mono);font-size:11px;font-weight:500;
  letter-spacing:.06em;color:rgba(157,180,160,.8);
  transition:color 140ms var(--ease);
}
.nav-link:hover{color:var(--cream)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link:hover .nav-num{color:var(--orange-soft)}
.nav-link[aria-current="page"]{color:var(--cream);font-weight:800}
.nav-link[aria-current="page"]::after{
  transform:scaleX(1);height:3px;border-radius:999px;bottom:9px;
}
.nav-link[aria-current="page"] .nav-num{color:var(--orange)}
.pill-cta{
  display:inline-flex;align-items:center;gap:8px;flex:0 0 auto;
  padding:11px 20px;border-radius:999px;
  background:var(--orange);color:var(--ink);
  font-size:14px;font-weight:900;letter-spacing:.02em;line-height:1;
  box-shadow:0 0 0 1px rgba(255,176,138,.5),0 12px 26px -14px rgba(255,107,44,.95);
  transition:opacity 160ms var(--ease),transform 160ms var(--ease),background 140ms var(--ease),box-shadow 140ms var(--ease);
}
.pill-cta:hover{background:#FF8348;box-shadow:0 0 0 1px rgba(255,176,138,.8),0 16px 30px -12px rgba(255,107,44,.95)}
.site-header[data-condensed] .pill-cta{opacity:0;transform:translateY(-6px);pointer-events:none}
.nav-toggle{
  display:none;align-items:center;gap:9px;flex:0 0 auto;
  padding:9px 14px;border-radius:999px;
  border:1px solid rgba(201,194,224,.34);color:var(--cream);
  font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;
  transition:border-color 140ms var(--ease),color 140ms var(--ease),background 140ms var(--ease);
}
.nav-toggle:hover{border-color:var(--orange);color:var(--orange-soft)}
.nav-toggle__bars,
.nav-toggle__bars::before,
.nav-toggle__bars::after{
  display:block;width:18px;height:2px;border-radius:2px;
  background:currentColor;content:"";
  transition:transform 160ms var(--ease),opacity 140ms var(--ease),width 160ms var(--ease);
}
.nav-toggle__bars{position:relative}
.nav-toggle__bars::before{position:absolute;left:0;top:-6px}
.nav-toggle__bars::after{position:absolute;left:0;top:6px;width:11px}
.nav-toggle__label{line-height:1}
.site-header[data-open] .nav-toggle{border-color:var(--orange);background:rgba(255,107,44,.14);color:var(--orange-soft)}
.site-header[data-open] .nav-toggle__bars{background:transparent}
.site-header[data-open] .nav-toggle__bars::before{transform:translateY(6px) rotate(45deg)}
.site-header[data-open] .nav-toggle__bars::after{width:18px;transform:translateY(-6px) rotate(-45deg)}
.scroll-rail{
  position:absolute;left:0;right:0;bottom:-1px;height:2px;
  background:rgba(122,91,255,.16);overflow:hidden;pointer-events:none;
}
.scroll-rail__bar{
  display:block;height:100%;width:calc(var(--progress,0) * 100%);
  background:linear-gradient(90deg,var(--purple-hi),var(--orange));
  transition:width 90ms linear;
}
.dock-pill{
  position:fixed;right:clamp(12px,3vw,28px);bottom:clamp(12px,3vw,28px);z-index:90;
  display:inline-flex;align-items:center;gap:10px;
  padding:12px 20px;border-radius:999px;
  background:var(--purple);color:var(--cream);
  font-size:14px;font-weight:800;line-height:1;letter-spacing:.01em;
  box-shadow:0 0 0 1px rgba(247,243,234,.16),0 20px 40px -18px rgba(0,0,0,.95),0 0 26px rgba(122,91,255,.4);
  opacity:0;visibility:hidden;transform:translateY(14px);
  transition:opacity 160ms var(--ease),transform 160ms var(--ease),visibility 160ms var(--ease),
    background 160ms var(--ease),color 160ms var(--ease),box-shadow 160ms var(--ease);
}
.dock-pill__num{
  font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;
  color:rgba(247,243,234,.72);transition:color 160ms var(--ease);
}
.dock-pill[data-visible]{opacity:1;visibility:visible;transform:none}
.dock-pill:hover{background:var(--purple-hi);box-shadow:0 0 0 1px rgba(247,243,234,.3),0 24px 44px -18px rgba(0,0,0,.95),0 0 30px rgba(122,91,255,.6)}
.dock-pill[data-hot]{background:var(--orange);color:var(--ink);box-shadow:0 0 0 1px rgba(255,176,138,.6),0 20px 40px -18px rgba(255,107,44,.9)}
.dock-pill[data-hot] .dock-pill__num{color:rgba(14,10,24,.65)}

/* ============ 13. Footer ============ */
.site-footer{
  margin-top:clamp(48px,8vw,96px);
  background:var(--ink);color:var(--haze);
  border-top:1px solid rgba(122,91,255,.22);
}
.footer-grid{
  display:grid;grid-template-columns:1.5fr .9fr 1.25fr 1.1fr;
  gap:clamp(20px,4vw,48px);
  padding-block:clamp(32px,6vw,64px);
}
.footer-grid>*+*{
  border-left:1px solid rgba(201,194,224,.1);
  padding-left:clamp(16px,2.4vw,32px);
}
.footer-line{font-size:15px;line-height:1.7;color:var(--cream);max-width:22em;margin-top:14px}
.footer-mono{
  font-family:var(--font-mono);font-size:12px;letter-spacing:.04em;line-height:1.9;
  color:rgba(201,194,224,.72);word-break:break-word;margin-top:8px;
}
.footer-title{
  display:flex;align-items:center;gap:8px;margin-bottom:14px;
  font-family:var(--font-mono);font-size:11px;font-weight:500;
  letter-spacing:.16em;text-transform:uppercase;color:var(--mint);
}
.footer-title::before{
  content:"";width:6px;height:6px;flex:0 0 auto;border-radius:2px;
  background:var(--orange);
}
.footer-list li{padding-block:4px;font-size:15px}
.footer-list a{
  position:relative;display:inline-block;padding-block:2px;
  color:var(--haze);transition:color 140ms var(--ease);
}
.footer-list a::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:1px;
  background:var(--orange);transform:scaleX(0);transform-origin:left center;
  transition:transform 140ms var(--ease);
}
.footer-list a:hover{color:var(--cream)}
.footer-list a:hover::after{transform:scaleX(1)}
.copy-btn{
  max-width:100%;padding:0 0 1px;text-align:left;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.03em;
  color:var(--cream);word-break:break-all;
  border-bottom:1px dashed rgba(157,180,160,.6);
  transition:color 140ms var(--ease),border-color 140ms var(--ease);
}
.copy-btn:hover{color:var(--orange-soft);border-bottom-color:var(--orange)}
.copy-btn[data-copied]{color:var(--mint);border-bottom-style:solid;border-bottom-color:var(--mint)}
.footer-legal{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:8px 24px;
  padding-block:18px 22px;
  border-top:1px solid rgba(201,194,224,.12);
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.06em;
  color:rgba(201,194,224,.62);
}
.footer-legal p{margin:0}

/* ============ 14. Responsive ============ */
@media (max-width:1080px){
  .header-meta{display:none}
}
@media (max-width:900px){
  .header-tagline{display:none}
  .header-top__inner{justify-content:space-between}
  .header-bar__inner{min-height:58px}
  .primary-nav{display:none}
  .site-header[data-open] .primary-nav{
    display:block;position:absolute;left:0;right:0;top:100%;z-index:85;
    padding:8px var(--gutter) 20px;
    background:var(--lamp);
    background-image:linear-gradient(180deg,rgba(91,63,209,.4),rgba(23,16,41,0) 70%);
    border-top:1px solid rgba(122,91,255,.24);
    border-bottom:1px solid rgba(255,107,44,.4);
    box-shadow:0 26px 52px -26px #000;
    max-height:calc(100vh - 58px);max-height:calc(100dvh - 58px);overflow-y:auto;
    transition:opacity 160ms var(--ease);
  }
  .nav-list{flex-direction:column;gap:0;overflow:visible}
  .nav-link{
    display:flex;width:100%;padding:15px 0;
    font-size:16px;border-bottom:1px solid rgba(201,194,224,.12);
  }
  .nav-link::after{bottom:10px}
  .nav-toggle{display:inline-flex}
  .grid--2,.grid--3{grid-template-columns:1fr}
  .grid--stagger>*:nth-child(even){margin-top:0}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px 32px}
  .footer-grid>*+*{border-left:0;padding-left:0}
  .footer-grid>*:nth-child(even){border-left:1px solid rgba(201,194,224,.1);padding-left:24px}
  .toc{position:static}
}
@media (max-width:640px){
  body{font-size:16px}
  .status-rail{border-radius:var(--r-md)}
  .status-rail__item{flex:1 1 46%;border-right:0;border-bottom:1px solid rgba(122,91,255,.2)}
  .status-rail__item:nth-last-child(-n+2){border-bottom:0}
  .footer-grid{grid-template-columns:1fr;gap:26px}
  .footer-grid>*:nth-child(even){border-left:0;padding-left:0}
  .footer-grid>*+*{border-top:1px solid rgba(201,194,224,.1);padding-top:22px}
  .footer-legal{flex-direction:column;align-items:flex-start;gap:6px}
  .dock-pill{padding:11px 16px;font-size:13px}
}

/* ============ 15. Reduced motion ============ */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    transition-duration:1ms !important;
    animation-duration:1ms !important;
    animation-iteration-count:1 !important;
  }
}