*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,h5,p,ul,ol,figure,blockquote,dl,dd{margin:0}
ul,ol{padding:0;list-style:none}
img,svg,video{display:block;max-width:100%}
button,input,select,textarea{font:inherit;color:inherit}
button{background:none;border:0;padding:0;cursor:pointer}
a{color:inherit;text-decoration:none}

:root{
  --ink-950:#051611;
  --pitch-900:#0A2A1F;
  --moss-700:#14503B;
  --gold-500:#D6A84B;
  --gold-300:#F3D58C;
  --cyan-400:#3FF2D0;
  --bone-100:#F5F0E4;
  --mist-300:#B7C6BD;
  --amber-600:#B8741A;
  --crimson-500:#E15B5B;
  --font-head:"Inter Tight","Noto Sans SC","PingFang SC",system-ui,sans-serif;
  --font-body:"Noto Sans SC","PingFang SC",system-ui,-apple-system,sans-serif;
  --font-mono:"JetBrains Mono","SFMono-Regular",Consolas,"Noto Sans SC",monospace;
  --shell:1240px;
  --gutter:clamp(16px,4vw,52px);
  --line:1px solid rgba(20,80,59,.9);
  --hair:1px solid rgba(183,198,189,.16);
  --ease:cubic-bezier(.22,.7,.24,1);
}
html[data-viewmode="wall"]{--shell:1580px;--gutter:clamp(20px,3.2vw,64px)}

html{background:var(--ink-950)}
body{
  min-height:100vh;
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.7;
  color:var(--bone-100);
  background-color:var(--ink-950);
  background-image:
    radial-gradient(1100px 620px at 88% -8%, rgba(214,168,75,.12), transparent 62%),
    radial-gradient(820px 480px at -6% 10%, rgba(63,242,208,.08), transparent 58%),
    repeating-linear-gradient(0deg, rgba(183,198,189,.035) 0 1px, transparent 1px 44px);
  -webkit-font-smoothing:antialiased;
}
::selection{background:var(--gold-500);color:var(--ink-950)}

h1,h2,h3,h4{
  font-family:var(--font-head);
  font-weight:800;
  letter-spacing:-.03em;
  line-height:1.1;
  text-wrap:balance;
}
h1{font-size:clamp(40px,6vw,96px);line-height:1.02}
h2{font-size:clamp(28px,3.4vw,44px);line-height:1.12}
h3{font-size:clamp(20px,1.8vw,26px);line-height:1.22}
p{text-wrap:pretty}

:where(a,button,[tabindex]):focus-visible{
  outline:2px solid var(--cyan-400);
  outline-offset:3px;
}
#main-content{display:block;scroll-margin-top:150px}

.shell{
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding-inline:var(--gutter);
}

/* ---------- skip link ---------- */
.skip-link{
  position:fixed;
  top:10px;left:10px;
  z-index:200;
  padding:10px 18px;
  font-family:var(--font-head);
  font-size:14px;
  font-weight:700;
  color:var(--ink-950);
  background:linear-gradient(120deg,var(--gold-300),var(--gold-500));
  border:1px solid rgba(243,213,140,.8);
  transform:translateY(-160%);
  transition:transform .18s var(--ease);
}
.skip-link:focus,
.skip-link:focus-visible{transform:translateY(0)}

/* ---------- header shell ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:100;
  background:linear-gradient(180deg, rgba(5,22,17,.99), rgba(5,22,17,.93));
  border-bottom:1px solid rgba(214,168,75,.3);
  -webkit-backdrop-filter:blur(6px);
  backdrop-filter:blur(6px);
}
.header-progress{
  position:absolute;
  top:0;left:0;right:0;
  height:2px;
  z-index:3;
  overflow:hidden;
  background:rgba(63,242,208,.1);
}
.header-progress__bar{
  display:block;
  width:100%;
  height:100%;
  transform:scaleX(0);
  transform-origin:0 50%;
  background:linear-gradient(90deg,var(--gold-500),var(--gold-300) 45%,var(--cyan-400));
}

/* ---------- masthead ---------- */
.masthead{
  position:relative;
  background:linear-gradient(104deg, var(--ink-950) 0%, var(--pitch-900) 58%, rgba(20,80,59,.62) 100%);
  border-bottom:1px solid rgba(63,242,208,.14);
}
.masthead::after{
  content:"";
  position:absolute;
  right:0;bottom:0;
  width:min(38%,420px);
  height:2px;
  background:linear-gradient(90deg,transparent,rgba(214,168,75,.7));
}
.masthead__inner{
  display:flex;
  align-items:center;
  gap:clamp(14px,2.6vw,34px);
  min-height:78px;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:12px;
  margin-right:auto;
  min-height:44px;
}
.brand__mark{
  position:relative;
  flex:0 0 auto;
  width:38px;
  height:38px;
  display:grid;
  place-items:center;
  border:1.5px solid var(--gold-500);
  background:linear-gradient(145deg, rgba(214,168,75,.24), rgba(10,42,31,.35));
  box-shadow:inset 0 0 0 3px rgba(5,22,17,.85);
  transition:border-color .18s var(--ease), box-shadow .18s var(--ease);
}
.brand__mark::before{
  content:"";
  width:13px;height:13px;
  background:linear-gradient(135deg,var(--gold-300),var(--gold-500));
  transform:rotate(45deg);
}
.brand__mark::after{
  content:"";
  position:absolute;
  inset:4px;
  border:1px solid rgba(63,242,208,.35);
}
.brand:hover .brand__mark{border-color:var(--gold-300);box-shadow:inset 0 0 0 3px rgba(5,22,17,.85),0 0 18px -4px rgba(214,168,75,.8)}
.brand__text{display:flex;flex-direction:column;gap:3px;line-height:1.15}
.brand__name{
  font-family:var(--font-head);
  font-size:19px;
  font-weight:800;
  letter-spacing:-.02em;
  color:var(--bone-100);
}
.brand__line{
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.1em;
  color:var(--mist-300);
}
.masthead__tools{
  display:flex;
  align-items:center;
  gap:clamp(8px,1.4vw,16px);
}
.version-stamp{
  display:inline-flex;
  align-items:baseline;
  gap:6px;
  padding:5px 11px;
  border:1px solid rgba(214,168,75,.5);
  background:linear-gradient(135deg, rgba(214,168,75,.18), rgba(5,22,17,.7));
  white-space:nowrap;
}
.version-stamp__label{
  font-family:var(--font-mono);
  font-size:9.5px;
  letter-spacing:.18em;
  color:var(--mist-300);
}
.version-stamp__num{
  font-family:var(--font-mono);
  font-size:17px;
  font-weight:700;
  letter-spacing:-.02em;
  background:linear-gradient(120deg,var(--gold-300),var(--gold-500) 55%,var(--gold-300));
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}
.viewswitch{
  position:relative;
  display:inline-flex;
  padding:3px;
  border:1px solid rgba(214,168,75,.35);
  background:rgba(5,22,17,.65);
}
.viewswitch__btn{
  position:relative;
  z-index:1;
  padding:7px 14px;
  font-family:var(--font-head);
  font-size:13px;
  font-weight:700;
  letter-spacing:.02em;
  color:var(--mist-300);
  transition:color .18s var(--ease);
  white-space:nowrap;
}
.viewswitch__btn:hover{color:var(--bone-100)}
.viewswitch__btn.is-active{color:var(--ink-950)}
.viewswitch__btn.is-active:hover{color:var(--ink-950)}
.viewswitch__btn.is-active::before{
  content:"";
  position:absolute;
  inset:0;
  z-index:-1;
  background:linear-gradient(120deg,var(--gold-300),var(--gold-500) 60%,#c8973c);
  animation:kit-sweep .45s var(--ease) both;
}
@keyframes kit-sweep{
  from{clip-path:inset(0 100% 0 0)}
  to{clip-path:inset(0 0 0 0)}
}

/* ---------- nav toggle ---------- */
.navtoggle{
  display:none;
  align-items:center;
  gap:10px;
  padding:10px 14px;
  border:1px solid rgba(63,242,208,.4);
  color:var(--bone-100);
  background:rgba(10,42,31,.6);
  transition:border-color .18s var(--ease), color .18s var(--ease);
}
.navtoggle:hover{border-color:var(--cyan-400);color:var(--cyan-400)}
.navtoggle__icon{
  position:relative;
  display:block;
  width:18px;height:2px;
  background:currentColor;
  transition:background .18s var(--ease);
}
.navtoggle__icon::before,
.navtoggle__icon::after{
  content:"";
  position:absolute;
  left:0;
  width:18px;height:2px;
  background:currentColor;
  transition:transform .18s var(--ease), top .18s var(--ease);
}
.navtoggle__icon::before{top:-6px}
.navtoggle__icon::after{top:6px}
.navtoggle__text{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.16em;
}
.site-header[data-open] .navtoggle{border-color:var(--gold-500);color:var(--gold-300)}
.site-header[data-open] .navtoggle__icon{background:transparent}
.site-header[data-open] .navtoggle__icon::before{top:0;transform:rotate(45deg)}
.site-header[data-open] .navtoggle__icon::after{top:0;transform:rotate(-45deg)}

/* ---------- main nav ---------- */
.mainnav{
  background:var(--pitch-900);
  border-top:1px solid rgba(63,242,208,.08);
}
.mainnav__inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  min-height:52px;
}
.mainnav__list{
  display:flex;
  align-items:center;
  gap:clamp(2px,1.6vw,18px);
}
.mainnav__link{
  position:relative;
  display:inline-flex;
  align-items:baseline;
  gap:7px;
  padding:11px 4px;
  font-family:var(--font-head);
  font-size:14.5px;
  font-weight:600;
  letter-spacing:.01em;
  color:var(--bone-100);
  transition:color .18s var(--ease);
  white-space:nowrap;
}
.mainnav__idx{
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.06em;
  color:var(--amber-600);
  transition:color .18s var(--ease);
}
.mainnav__link::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:0;
  height:2px;
  background:linear-gradient(90deg,var(--gold-300),var(--cyan-400));
  transform:scaleX(0);
  transform-origin:0 50%;
  transition:transform .22s var(--ease);
}
.mainnav__link:hover{color:var(--gold-300)}
.mainnav__link:hover .mainnav__idx{color:var(--gold-300)}
.mainnav__link:hover::after{transform:scaleX(1)}
.mainnav__link[aria-current="page"]{color:var(--gold-300)}
.mainnav__link[aria-current="page"] .mainnav__idx{color:var(--cyan-400)}
.mainnav__link[aria-current="page"]::after{transform:scaleX(1)}
.mainnav__meta{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.12em;
  color:var(--mist-300);
  white-space:nowrap;
}
.mainnav__cta{display:none}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:11px 20px;
  font-family:var(--font-head);
  font-size:14px;
  font-weight:700;
  letter-spacing:.01em;
  border:1px solid transparent;
  transition:transform .18s var(--ease), box-shadow .18s var(--ease), background-color .18s var(--ease), color .18s var(--ease), border-color .18s var(--ease);
}
.btn--gold{
  color:var(--ink-950);
  background:linear-gradient(120deg,var(--gold-300),var(--gold-500) 55%,#c8973c);
  border-color:rgba(243,213,140,.7);
  box-shadow:inset 0 1px 0 rgba(243,213,140,.6), 0 10px 26px -14px rgba(214,168,75,.9);
}
.btn--gold:hover{
  transform:translateY(-1px);
  box-shadow:inset 0 1px 0 rgba(243,213,140,.75), 0 16px 32px -16px rgba(214,168,75,1);
}
.btn--ghost{
  color:var(--bone-100);
  background:rgba(5,22,17,.4);
  border-color:rgba(63,242,208,.4);
}
.btn--ghost:hover{color:var(--cyan-400);border-color:var(--cyan-400)}
.btnrow{display:flex;flex-wrap:wrap;gap:12px}

/* ---------- page building blocks ---------- */
.section{padding-block:clamp(40px,6vw,84px)}
.section--tight{padding-block:clamp(26px,4vw,52px)}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:600;
  letter-spacing:.2em;
  color:var(--gold-300);
}
.eyebrow::before{
  content:"";
  width:22px;height:2px;
  background:linear-gradient(90deg,var(--gold-500),var(--cyan-400));
}
.lede{
  max-width:62ch;
  font-size:clamp(16px,1.35vw,19px);
  line-height:1.75;
  color:var(--mist-300);
}
.num{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  letter-spacing:-.02em;
}
.rule{
  height:1px;
  border:0;
  margin-block:clamp(24px,4vw,44px);
  background:linear-gradient(90deg,rgba(214,168,75,.55),rgba(63,242,208,.28),transparent);
}
.split{
  display:grid;
  grid-template-columns:minmax(220px,.85fr) minmax(0,2.15fr);
  gap:clamp(24px,4vw,56px);
  align-items:start;
}
.grid{display:grid;gap:clamp(16px,2.4vw,28px)}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid--auto{grid-template-columns:repeat(auto-fit,minmax(250px,1fr))}
.panel{
  position:relative;
  padding:clamp(18px,2.4vw,30px);
  background:linear-gradient(160deg,var(--pitch-900),rgba(5,22,17,.94));
  border:var(--line);
}
.panel::before{
  content:"";
  position:absolute;
  top:-1px;left:0;
  width:64px;height:2px;
  background:linear-gradient(90deg,var(--gold-500),transparent);
}
.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 10px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  color:var(--cyan-400);
  border:1px solid rgba(63,242,208,.35);
  background:rgba(63,242,208,.08);
}
.tag--gold{
  color:var(--gold-300);
  border-color:rgba(214,168,75,.45);
  background:rgba(214,168,75,.1);
}
.crumbs{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  padding-block:16px;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.08em;
  color:var(--mist-300);
}
.crumbs a{color:var(--mist-300);transition:color .18s var(--ease)}
.crumbs a:hover{color:var(--cyan-400)}
.crumbs__sep{color:var(--moss-700)}

/* ---------- image containers ---------- */
.imgbox{
  position:relative;
  display:block;
  width:100%;
  overflow:hidden;
  border:var(--line);
  background:
    linear-gradient(135deg,var(--pitch-900),var(--ink-950) 58%,rgba(214,168,75,.18));
}
.imgbox::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background:repeating-linear-gradient(0deg, rgba(63,242,208,.06) 0 1px, transparent 1px 4px);
}
.imgbox > img{
  display:block;
  width:100%;height:100%;
  object-fit:cover;
}
.imgbox--16x9{aspect-ratio:16/9}
.imgbox--4x3{aspect-ratio:4/3}
.imgbox--1x1{aspect-ratio:1/1}
.imgbox__label{
  position:absolute;
  left:12px;bottom:12px;
  z-index:1;
  padding:4px 9px;
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.12em;
  color:var(--gold-300);
  background:rgba(5,22,17,.8);
  border:1px solid rgba(214,168,75,.45);
}

/* ---------- footer ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(48px,8vw,96px);
  background:linear-gradient(180deg,var(--pitch-900),var(--ink-950) 72%);
  border-top:1px solid rgba(20,80,59,.9);
}
.site-footer::before{
  content:"";
  position:absolute;
  top:-1px;left:0;right:0;
  height:2px;
  background:repeating-linear-gradient(90deg, rgba(214,168,75,.7) 0 14px, transparent 14px 30px);
  opacity:.8;
}
.footer__inner{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.2fr;
  gap:clamp(20px,3vw,44px);
  padding-block:clamp(34px,5vw,64px);
}
.footer__col{min-width:0}
.footer__col--brand{max-width:38ch}
.footer__name{
  font-family:var(--font-head);
  font-size:22px;
  font-weight:800;
  letter-spacing:-.02em;
  color:var(--bone-100);
}
.footer__ver{
  display:inline-flex;
  margin-top:10px;
  padding:4px 10px;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.08em;
  color:var(--gold-500);
  border:1px solid rgba(214,168,75,.4);
  background:rgba(214,168,75,.07);
}
.footer__note{
  margin-top:14px;
  font-size:13px;
  line-height:1.65;
  color:var(--mist-300);
}
.footer__title{
  display:block;
  padding-bottom:10px;
  font-family:var(--font-body);
  font-size:11px;
  font-weight:600;
  line-height:1.4;
  letter-spacing:.18em;
  color:var(--gold-300);
  border-bottom:1px solid rgba(20,80,59,.9);
}
.footer__list{
  display:flex;
  flex-direction:column;
  gap:9px;
  margin-top:14px;
}
.footer__link{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:14px;
  color:var(--bone-100);
  transition:color .18s var(--ease);
}
.footer__link::before{
  content:"";
  width:12px;height:1px;
  background:var(--moss-700);
  transition:width .18s var(--ease), background-color .18s var(--ease);
}
.footer__link:hover{color:var(--gold-300)}
.footer__link:hover::before{width:22px;background:var(--cyan-400)}
.footer__meta{
  margin-top:10px;
  font-size:12px;
  line-height:1.65;
  color:var(--mist-300);
  overflow-wrap:anywhere;
}
.footer__base{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:10px 24px;
  padding-block:18px 26px;
  border-top:1px solid rgba(20,80,59,.9);
}
.footer__legal{
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.06em;
  color:var(--mist-300);
}

/* ---------- back to top (injected by JS) ---------- */
.totop{
  position:fixed;
  right:clamp(14px,3vw,28px);
  bottom:clamp(14px,3vw,28px);
  z-index:120;
  display:grid;
  place-items:center;
  width:46px;height:46px;
  font-family:var(--font-mono);
  font-size:16px;
  color:var(--gold-300);
  background:rgba(10,42,31,.92);
  border:1px solid rgba(214,168,75,.5);
  -webkit-backdrop-filter:blur(4px);
  backdrop-filter:blur(4px);
  transition:color .18s var(--ease), border-color .18s var(--ease), transform .18s var(--ease);
}
.totop:hover{color:var(--cyan-400);border-color:var(--cyan-400);transform:translateY(-2px)}
.totop[hidden]{display:none}

/* ---------- responsive ---------- */
@media (max-width:1180px){
  .mainnav__meta{display:none}
}
@media (max-width:980px){
  #main-content{scroll-margin-top:200px}
  .masthead__inner{flex-wrap:wrap;row-gap:12px;padding-block:12px;min-height:0}
  .brand{order:1;flex:1 1 auto}
  .navtoggle{order:2;display:inline-flex}
  .masthead__tools{
    order:3;
    flex:1 0 100%;
    justify-content:space-between;
    padding-top:11px;
    border-top:1px solid rgba(20,80,59,.8);
  }
  .masthead__cta{display:none}
  .mainnav{
    display:none;
    max-height:calc(100vh - 128px);
    overflow-y:auto;
    border-top:1px solid rgba(63,242,208,.16);
  }
  .site-header[data-open] .mainnav{display:block}
  .mainnav__inner{
    flex-direction:column;
    align-items:stretch;
    gap:0;
    padding-block:8px 18px;
  }
  .mainnav__list{flex-direction:column;align-items:stretch;gap:0}
  .mainnav__link{
    justify-content:flex-start;
    padding:14px 2px;
    font-size:16px;
    border-bottom:1px solid rgba(20,80,59,.85);
  }
  .mainnav__link::after{display:none}
  .mainnav__idx{color:var(--mist-300)}
  .mainnav__link[aria-current="page"]{color:var(--gold-300)}
  .mainnav__link[aria-current="page"] .mainnav__idx{color:var(--cyan-400)}
  .mainnav__cta{
    display:inline-flex;
    align-self:flex-start;
    margin-top:16px;
  }
  .split{grid-template-columns:1fr}
  .grid--2,.grid--3{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer__inner{grid-template-columns:1fr 1fr}
  .footer__col--brand{grid-column:1/-1;max-width:none}
}
@media (max-width:640px){
  .brand__name{font-size:17px}
  .brand__line{font-size:9.5px;letter-spacing:.06em}
  .brand__mark{width:34px;height:34px}
  .version-stamp{padding:4px 9px}
  .version-stamp__num{font-size:15px}
  .viewswitch__btn{padding:6px 10px;font-size:12px}
  .grid--2,.grid--3{grid-template-columns:1fr}
  .footer__inner{grid-template-columns:1fr}
  .footer__base{flex-direction:column;align-items:flex-start}
}

@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .viewswitch__btn.is-active::before{animation:none}
  .totop:hover{transform:none}
}