:root{
  --ink:#080D14;
  --night:#061A2E;
  --panel:#0C2A47;
  --line:#1C4767;
  --green:#C8FF3D;
  --orange:#FF6A1A;
  --purple:#7B5BFF;
  --paper:#F3EDE1;
  --mist:#9FB3C8;
  --score:#EAF6FF;
  --shell:1180px;
  --shell-wide:1420px;
  --gap:clamp(16px,2.4vw,32px);
  --pad:clamp(20px,5vw,64px);
  --radius-lg:28px;
  --radius-md:18px;
  --radius-pill:999px;
  --font-display:"Archivo Black","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-heading:"Noto Sans SC","Inter",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-body:"Noto Sans SC","Inter",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:"JetBrains Mono","Roboto Mono",ui-monospace,SFMono-Regular,Menlo,monospace;
  --t:180ms cubic-bezier(.2,.7,.3,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--night);
  color:var(--score);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.75;
  letter-spacing:.01em;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background:
    linear-gradient(to right,rgba(28,71,103,.32) 1px,transparent 1px) 0 0/96px 96px,
    linear-gradient(to bottom,rgba(28,71,103,.22) 1px,transparent 1px) 0 0/96px 96px,
    radial-gradient(120% 80% at 88% -10%,rgba(123,91,255,.20),transparent 60%),
    radial-gradient(90% 60% at -10% 100%,rgba(28,71,103,.30),transparent 65%);
  opacity:.9;
}
img,svg{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
h1,h2,h3,h4{margin:0;line-height:1.08;font-family:var(--font-heading)}
p{margin:0}
ul,ol,dl,dd{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--green);outline-offset:3px;border-radius:4px}
::selection{background:var(--green);color:var(--ink)}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:0}
.num{font-family:var(--font-mono);font-variant-numeric:tabular-nums;color:var(--score)}

.shell{width:100%;max-width:var(--shell);margin-inline:auto;padding-inline:var(--pad);position:relative;z-index:1}
.shell-wide{width:100%;max-width:var(--shell-wide);margin-inline:auto;padding-inline:var(--pad);position:relative;z-index:1}
.site-grid{position:relative}
.site-grid::before{
  content:"";
  position:absolute;inset:0;z-index:0;pointer-events:none;
  background:linear-gradient(to right,rgba(28,71,103,.26) 1px,transparent 1px) 0 0/72px 100%;
}
.grid-12{display:grid;grid-template-columns:repeat(12,1fr);gap:var(--gap)}

.skip-link{
  position:absolute;left:16px;top:-64px;z-index:60;
  background:var(--green);color:var(--ink);
  padding:12px 20px;border-radius:var(--radius-pill);
  font-family:var(--font-heading);font-weight:600;font-size:14px;
  transition:top var(--t);
}
.skip-link:focus-visible{top:12px}

.index-label{
  font-family:var(--font-mono);
  font-size:12px;letter-spacing:.24em;text-transform:uppercase;
  color:var(--mist);margin:0;
}
.index-label--green{color:var(--green)}
.index-label--orange{color:var(--orange)}
.index-label--purple{color:var(--purple)}

.display-xl{
  font-family:var(--font-display);
  font-weight:900;
  font-size:clamp(56px,9vw,148px);
  letter-spacing:-.02em;line-height:.92;
  text-transform:none;
}
.section-title{
  font-family:var(--font-display);
  font-size:clamp(32px,4.6vw,48px);
  letter-spacing:-.015em;line-height:1.05;
}
.card-title{font-family:var(--font-heading);font-weight:600;font-size:clamp(20px,2.2vw,24px);line-height:1.25}
.lede{font-size:clamp(16px,1.4vw,18px);color:var(--mist);max-width:62ch}
.muted{color:var(--mist)}
.rule{height:1px;background:var(--line);border:0;margin:0}
.tag-divider{display:flex;align-items:center;gap:10px;color:var(--orange);font-family:var(--font-mono);font-size:12px;letter-spacing:.24em;text-transform:uppercase}
.tag-divider::before{content:"";width:0;height:0;border-left:6px solid transparent;border-right:6px solid transparent;border-bottom:8px solid var(--orange)}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:50;
  background:linear-gradient(180deg,rgba(6,26,46,.96),rgba(6,26,46,.78));
  border-bottom:1px solid var(--line);
  backdrop-filter:blur(10px);
}
.site-header__inner{
  display:flex;align-items:center;gap:clamp(12px,3vw,40px);
  min-height:76px;
  transition:min-height var(--t);
}
.site-header.is-condensed{background:rgba(6,26,46,.98)}
.site-header.is-condensed .site-header__inner{min-height:58px}
.site-header.is-condensed .brand__tagline{opacity:0;max-width:0}
.brand{display:flex;align-items:baseline;gap:12px;flex:0 0 auto}
.brand__mark{
  font-family:var(--font-display);
  font-size:clamp(18px,1.9vw,22px);
  letter-spacing:-.01em;color:var(--score);
  position:relative;
}
.brand__mark::after{
  content:"";position:absolute;left:0;bottom:-4px;width:100%;height:3px;
  background:linear-gradient(90deg,var(--green),var(--purple));
  border-radius:var(--radius-pill);
}
.brand__tagline{
  font-size:12px;letter-spacing:.18em;color:var(--mist);
  overflow:hidden;white-space:nowrap;max-width:200px;
  transition:opacity var(--t),max-width var(--t);
}
.header-rule{
  flex:1 1 auto;height:1px;min-width:20px;
  background-image:linear-gradient(90deg,var(--line) 0 6px,transparent 6px 14px);
  background-size:14px 1px;background-repeat:repeat-x;
}
.nav{flex:0 0 auto}
.nav__list{display:flex;align-items:center;gap:clamp(10px,1.8vw,26px)}
.nav__link{
  position:relative;display:inline-block;
  font-family:var(--font-heading);font-weight:600;font-size:14px;
  color:var(--mist);padding:6px 2px;
  transition:color var(--t);
}
.nav__link::after{
  content:"";position:absolute;left:0;bottom:0;height:2px;width:0;
  background:var(--green);transition:width var(--t);
}
.nav__link:hover,.nav__link:focus-visible{color:var(--score)}
.nav__link:hover::after,.nav__link:focus-visible::after{width:100%}
.nav__link[aria-current="page"]{color:var(--green)}
.nav__link[aria-current="page"]::after{width:100%}

.nav-toggle{
  display:none;align-items:center;gap:8px;
  border:1px solid var(--line);border-radius:var(--radius-pill);
  padding:8px 14px;color:var(--score);
  font-family:var(--font-heading);font-weight:600;font-size:13px;
  transition:border-color var(--t),color var(--t);
}
.nav-toggle:hover{border-color:var(--green);color:var(--green)}
.nav-toggle__bar{display:block;width:14px;height:2px;background:var(--green);border-radius:2px}
.nav-toggle__bar + .nav-toggle__bar{width:9px}
.nav-toggle__text{letter-spacing:.1em}

.scroll-progress{
  position:absolute;left:0;bottom:-1px;height:2px;width:100%;
  transform-origin:left center;
  transform:scaleX(var(--progress,0));
  background:linear-gradient(90deg,var(--green),var(--purple),var(--orange));
}

/* ---------- drawer ---------- */
.nav-drawer{
  position:fixed;inset:0;z-index:49;
  background:linear-gradient(160deg,var(--night),var(--ink) 70%);
  padding:calc(76px + 24px) var(--pad) 32px;
  transform:translateY(-102%);
  transition:transform 260ms cubic-bezier(.2,.7,.3,1);
  overflow-y:auto;
}
.nav-drawer[data-open]{transform:translateY(0)}
.nav-drawer__inner{max-width:520px;margin-inline:auto;display:grid;gap:24px}
.nav-drawer__list{display:grid;gap:2px}
.nav-drawer__link{
  display:flex;align-items:baseline;gap:16px;
  font-family:var(--font-display);
  font-size:clamp(26px,7vw,40px);
  letter-spacing:-.02em;
  padding:12px 0;border-bottom:1px solid var(--line);
  color:var(--score);
  transition:color var(--t),border-color var(--t);
}
.nav-drawer__link .mono{font-size:12px;color:var(--purple);letter-spacing:.2em}
.nav-drawer__link:hover,.nav-drawer__link:focus-visible{color:var(--green);border-color:var(--green)}
.nav-drawer__link[aria-current="page"]{color:var(--green)}
.nav-drawer__cta{justify-self:start}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--font-heading);font-weight:600;font-size:15px;
  padding:14px 26px;border-radius:var(--radius-pill);
  border:1px solid var(--line);color:var(--score);background:transparent;
  transition:background var(--t),color var(--t),border-color var(--t),transform var(--t);
}
.btn:hover{transform:translateY(-2px)}
.btn--primary{background:var(--green);color:var(--ink);border-color:var(--green)}
.btn--primary:hover{background:var(--score);border-color:var(--score)}
.btn--ghost:hover{border-color:var(--green);color:var(--green)}
.btn--orange{background:var(--orange);color:var(--ink);border-color:var(--orange)}
.btn--orange:hover{background:var(--score);border-color:var(--score)}

.link-sweep{position:relative;color:var(--score);transition:color var(--t)}
.link-sweep::after{
  content:"";position:absolute;left:0;bottom:-2px;height:1px;width:0;background:var(--purple);
  transition:width var(--t);
}
.link-sweep:hover,.link-sweep:focus-visible{color:var(--purple)}
.link-sweep:hover::after,.link-sweep:focus-visible::after{width:100%}

/* ---------- blocks ---------- */
.diagonal-block{
  position:relative;
  background:linear-gradient(135deg,var(--panel),var(--night));
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  clip-path:polygon(0 0,100% 6%,100% 100%,0 94%);
  padding:clamp(28px,5vw,72px);
}
.diagonal-block--reverse{clip-path:polygon(0 6%,100% 0,100% 94%,0 100%)}

.panel{
  background:linear-gradient(180deg,rgba(12,42,71,.92),rgba(6,26,46,.92));
  border:1px solid var(--line);
  border-radius:var(--radius-md);
  padding:clamp(18px,2.4vw,28px);
}
.panel--float{box-shadow:0 26px 60px -30px rgba(0,0,0,.9)}
.tilt-a{transform:rotate(-2.4deg)}
.tilt-b{transform:rotate(1.8deg)}

.stat-card{
  display:grid;gap:6px;
  background:linear-gradient(160deg,rgba(12,42,71,.95),rgba(6,26,46,.9));
  border:1px solid var(--line);border-left:3px solid var(--green);
  border-radius:var(--radius-md);
  padding:20px 22px;
}
.stat-card__value{font-family:var(--font-mono);font-variant-numeric:tabular-nums;font-size:clamp(30px,4vw,48px);color:var(--green);line-height:1}
.stat-card__label{font-family:var(--font-heading);font-weight:600;font-size:14px}
.stat-card__meta{font-size:13px;color:var(--mist);font-family:var(--font-mono)}
.stat-card.is-pulsing .stat-card__value{animation:pulse 240ms ease-out}
@keyframes pulse{0%{color:var(--score);transform:scale(1.04)}100%{color:var(--green);transform:scale(1)}}

.chip-group{display:flex;flex-wrap:wrap;gap:10px}
.chip{
  font-family:var(--font-heading);font-weight:600;font-size:13px;
  padding:8px 16px;border-radius:var(--radius-pill);
  border:1px solid var(--line);color:var(--mist);
  transition:color var(--t),border-color var(--t),background var(--t);
}
.chip:hover{color:var(--score);border-color:var(--score)}
.chip[aria-pressed="true"],.chip.is-active{
  background:var(--green);color:var(--ink);border-color:var(--green);
}

.faq{display:grid;gap:10px}
.faq__item{border:1px solid var(--line);border-radius:var(--radius-md);overflow:hidden;background:rgba(12,42,71,.55)}
.faq__button{
  display:flex;justify-content:space-between;align-items:center;gap:16px;width:100%;
  text-align:left;padding:18px 22px;
  font-family:var(--font-heading);font-weight:600;font-size:16px;
}
.faq__button::after{content:"＋";color:var(--green);font-family:var(--font-mono)}
.faq__button[aria-expanded="true"]::after{content:"－"}
.faq__panel{display:none;padding:0 22px 20px;color:var(--mist)}
.faq__panel.is-open{display:block}

.toc{display:grid;gap:8px}
.toc__link{
  display:flex;gap:12px;align-items:baseline;
  font-size:14px;color:var(--mist);padding:6px 0;
  border-left:2px solid var(--line);padding-left:14px;
  transition:color var(--t),border-color var(--t);
}
.toc__link:hover,.toc__link[aria-current="true"]{color:var(--green);border-color:var(--green)}

.breadcrumb{display:flex;flex-wrap:wrap;gap:8px;align-items:center;font-size:13px;color:var(--mist);font-family:var(--font-mono)}
.breadcrumb__item + .breadcrumb__item::before{content:"/";margin-right:8px;color:var(--line)}
.breadcrumb__item[aria-current="page"]{color:var(--green)}

.prose{max-width:70ch;font-size:16px}
.prose p + p{margin-top:1em}
.prose h2{margin-top:1.6em;font-size:clamp(24px,3vw,34px);font-family:var(--font-display);letter-spacing:-.01em}
.prose h3{margin-top:1.4em;font-size:20px;font-family:var(--font-heading)}
.prose ul{margin-top:1em;display:grid;gap:8px}
.prose li{padding-left:20px;position:relative;color:var(--mist)}
.prose li::before{content:"";position:absolute;left:0;top:.7em;width:8px;height:2px;background:var(--green)}
.prose--paper{
  background:var(--paper);color:var(--ink);
  border-radius:var(--radius-lg);
  padding:clamp(24px,4vw,56px);
}
.prose--paper li{color:#32404f}
.prose--paper .index-label{color:#5b6b7c}
.prose--paper a{color:#0C2A47;text-decoration:underline}
.prose--paper a:hover{color:var(--orange)}

.media-frame{
  position:relative;width:100%;aspect-ratio:16/9;overflow:hidden;
  border-radius:var(--radius-md);border:1px solid var(--line);
  background:linear-gradient(140deg,var(--panel),var(--night) 60%,rgba(123,91,255,.28));
}
.media-frame--wide{aspect-ratio:21/9}
.media-frame--tall{aspect-ratio:4/5}
.media-frame img{width:100%;height:100%;object-fit:cover}
.media-frame__caption{
  position:absolute;left:0;bottom:0;right:0;
  padding:10px 14px;font-size:12px;font-family:var(--font-mono);
  color:var(--mist);background:linear-gradient(0deg,rgba(6,26,46,.92),transparent);
}

.reveal{opacity:0;transform:translateY(18px);transition:opacity 420ms ease,transform 420ms ease}
.reveal.is-visible{opacity:1;transform:none}

.to-top{
  position:fixed;right:clamp(14px,3vw,28px);bottom:clamp(14px,3vw,28px);z-index:45;
  width:46px;height:46px;border-radius:50%;
  border:1px solid var(--line);background:rgba(6,26,46,.9);color:var(--green);
  font-family:var(--font-mono);font-size:18px;
  opacity:0;pointer-events:none;transform:translateY(10px);
  transition:opacity var(--t),transform var(--t),border-color var(--t);
}
.to-top[data-active]{opacity:1;pointer-events:auto;transform:none}
.to-top:hover{border-color:var(--green)}

/* ---------- footer ---------- */
.site-footer{
  position:relative;margin-top:clamp(48px,8vw,110px);
  background:linear-gradient(180deg,rgba(8,13,20,.9),var(--ink));
  border-top:1px solid var(--line);
}
.site-footer::before{
  content:"";position:absolute;top:0;left:0;right:0;height:3px;
  background:linear-gradient(90deg,var(--green),var(--purple),var(--orange));
}
.site-footer__grid{
  display:grid;
  grid-template-columns:1.3fr 1fr 1.1fr;
  gap:clamp(24px,4vw,56px);
  padding-block:clamp(36px,6vw,72px);
}
.footer-brand{display:grid;gap:14px;align-content:start}
.brand--footer{flex-direction:column;align-items:flex-start;gap:10px}
.footer-note{color:var(--mist);font-size:14px;max-width:30ch}
.footer-icp{font-family:var(--font-mono);font-size:13px;color:var(--green)}
.footer-index__list{display:grid;gap:10px;margin-top:16px}
.footer-index__link{display:flex;gap:12px;align-items:baseline;font-size:14px;color:var(--mist);transition:color var(--t)}
.footer-index__link .mono{font-size:12px;color:var(--line)}
.footer-index__link:hover,.footer-index__link:focus-visible{color:var(--green)}
.footer-index__link:hover .mono{color:var(--purple)}
.footer-contact__list{display:grid;gap:4px;margin-top:16px}
.footer-contact__list dt{font-size:12px;letter-spacing:.18em;color:var(--line);text-transform:uppercase;margin-top:12px}
.footer-contact__list dd{font-size:14px;color:var(--mist)}
.site-footer__bottom{
  display:flex;flex-wrap:wrap;gap:10px 24px;justify-content:space-between;
  border-top:1px solid var(--line);
  padding-block:20px;
}
.footer-copy{font-size:13px;color:var(--mist)}
.footer-copy--muted{font-family:var(--font-mono);color:var(--line)}

@media (max-width:1024px){
  .footer-index__list{grid-template-columns:repeat(2,1fr);display:grid}
}
@media (max-width:900px){
  .nav{display:none}
  .nav-toggle{display:inline-flex}
  .brand__tagline{max-width:150px}
  .site-footer__grid{grid-template-columns:1fr 1fr}
  .footer-contact{grid-column:1 / -1}
}
@media (max-width:640px){
  body{font-size:15px}
  .site-header__inner{min-height:64px;gap:12px}
  .brand__tagline{display:none}
  .site-footer__grid{grid-template-columns:1fr;gap:32px}
  .site-footer__bottom{flex-direction:column}
  .tilt-a,.tilt-b{transform:none}
  .diagonal-block{clip-path:polygon(0 0,100% 3%,100% 100%,0 97%)}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important}
  .reveal{opacity:1;transform:none}
  .nav-drawer{transition:none}
  .to-top{transform:none}
}