*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
@media (prefers-reduced-motion:no-preference){html{scroll-behavior:smooth}}
body,h1,h2,h3,h4,p,figure,blockquote,dl,dd,ul,ol{margin:0}
ul,ol{padding:0;list-style:none}
img,svg,video{display:block;max-width:100%}
button{font:inherit;background:none;border:0;color:inherit}
a{color:inherit}

:root{
  --ink-900:#060C16;
  --ink-800:#0C1727;
  --ink-700:#16273D;
  --mist-100:#E9F0F7;
  --steel-400:#8496AC;
  --signal:#3DF2C0;
  --teal-700:#17A98C;
  --track:#FF6A2B;
  --amber:#FFC24B;
  --ember:#C24A16;
  --parchment:#F2E9D8;

  --font-display:"Oswald","Archivo Narrow","Barlow Condensed","PingFang SC","Source Han Sans SC","Noto Sans SC","Microsoft YaHei",system-ui,sans-serif;
  --font-body:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-mono:"JetBrains Mono","IBM Plex Mono","SFMono-Regular",ui-monospace,Consolas,"Liberation Mono",monospace;

  --rail:88px;
  --topbar:60px;
  --shell-max:1320px;
  --gutter:clamp(18px,4vw,56px);
  --dur:200ms;
  --ease:ease-out;
  --sync:0%;
}

body{
  background:var(--ink-900);
  color:var(--mist-100);
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.75;
  font-weight:400;
  min-height:100vh;
  -webkit-font-smoothing:antialiased;
}
@media (min-width:901px){body{padding-left:var(--rail)}}
@media (max-width:900px){body{padding-top:var(--topbar)}}

:where(a,button,summary,[tabindex]):focus-visible{
  outline:2px solid var(--signal);
  outline-offset:2px;
}

::selection{background:var(--signal);color:var(--ink-900)}

/* ---------- layout utilities ---------- */
.shell{
  width:100%;
  max-width:var(--shell-max);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.section{
  position:relative;
  padding-block:clamp(36px,6vw,72px);
}
.section + .section{border-top:1px solid var(--ink-700)}
.stack{display:flex;flex-direction:column;gap:clamp(10px,1.6vw,18px)}
.grid{display:grid;gap:clamp(14px,2.4vw,28px)}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}

/* ---------- type ---------- */
.display-1,.display-2,.display-3{
  font-family:var(--font-display);
  font-weight:700;
  color:var(--mist-100);
  text-wrap:balance;
}
.display-1{font-size:clamp(40px,7vw,96px);line-height:.94;letter-spacing:-.015em}
.display-2{font-size:clamp(28px,4.2vw,44px);line-height:1.02;letter-spacing:-.01em}
.display-3{font-size:22px;line-height:1.25;letter-spacing:.005em}
.eyebrow{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--signal);
  display:inline-flex;
  align-items:center;
  gap:8px;
}
.eyebrow::before{content:"";width:16px;height:1px;background:currentColor}
.mono{
  font-family:var(--font-mono);
  font-size:14px;
  letter-spacing:.02em;
  font-variant-numeric:tabular-nums;
}
.lead{font-size:clamp(17px,1.6vw,19px);line-height:1.7;color:var(--steel-400);max-width:38em}
.link-track{
  color:var(--track);
  text-decoration:none;
  border-bottom:1px solid transparent;
  transition:border-color var(--dur) var(--ease),color var(--dur) var(--ease);
}
.link-track:hover{border-bottom-color:currentColor;color:var(--ember)}
.slash-rule{
  height:1px;border:0;margin:0;
  background:repeating-linear-gradient(90deg,var(--ink-700) 0 10px,transparent 10px 18px);
}

/* ---------- breadcrumbs ---------- */
.breadcrumbs{padding-block:clamp(16px,3vw,26px)}
.breadcrumbs ol{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.02em;
  color:var(--steel-400);
}
.breadcrumbs li{display:flex;align-items:center;gap:8px}
.breadcrumbs li + li::before{content:"/";color:var(--ink-700)}
.breadcrumbs a{color:var(--steel-400);text-decoration:none;transition:color var(--dur) var(--ease)}
.breadcrumbs a:hover{color:var(--track)}
.breadcrumbs [aria-current="page"]{color:var(--mist-100)}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:10px;
  padding:12px 22px;
  font-family:var(--font-body);font-size:15px;font-weight:700;line-height:1;
  color:var(--ink-900);
  background:var(--track);
  text-decoration:none;cursor:pointer;
  clip-path:polygon(0 0,calc(100% - 12px) 0,100% 12px,100% 100%,12px 100%,0 calc(100% - 12px));
  transition:background var(--dur) var(--ease),transform var(--dur) var(--ease),color var(--dur) var(--ease);
}
.btn:hover{background:#ff8347;transform:translateY(-2px)}
.btn:active{background:var(--ember);color:var(--mist-100);transform:translateY(0)}
.btn--ghost{
  background:var(--ink-800);color:var(--mist-100);
  box-shadow:inset 0 0 0 1px var(--ink-700);
}
.btn--ghost:hover{background:var(--ink-700);color:var(--signal);box-shadow:inset 0 0 0 1px var(--signal)}
.btn--signal{background:transparent;color:var(--signal);box-shadow:inset 0 0 0 1px var(--signal)}
.btn--signal:hover{background:var(--signal);color:var(--ink-900)}

/* ---------- chips ---------- */
.chip{
  display:inline-flex;align-items:center;gap:8px;
  padding:7px 14px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.04em;
  color:var(--steel-400);
  background:var(--ink-800);
  box-shadow:inset 0 0 0 1px var(--ink-700);
  text-decoration:none;cursor:pointer;
  transition:color var(--dur) var(--ease),box-shadow var(--dur) var(--ease),background var(--dur) var(--ease);
}
.chip:hover{color:var(--mist-100);background:var(--ink-700)}
.chip[aria-pressed="true"],.chip[aria-current="true"]{
  color:var(--signal);background:transparent;box-shadow:inset 0 0 0 1px var(--signal);
}

/* ---------- panels & data ---------- */
.panel{
  background:var(--ink-800);
  padding:clamp(16px,2.6vw,28px);
}
.panel--cut{
  clip-path:polygon(0 0,calc(100% - 20px) 0,100% 20px,100% 100%,0 100%);
}
.data-strip{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:clamp(10px,2vw,28px);
  background:var(--ink-800);
  border-left:3px solid var(--signal);
  padding:clamp(12px,2vw,20px) clamp(14px,3vw,28px);
}

/* ---------- media ---------- */
.media-frame{
  position:relative;
  overflow:hidden;
  background:var(--ink-800);
  aspect-ratio:16/10;
  box-shadow:inset 0 0 0 1px var(--ink-700);
}
.media-frame img{
  width:100%;height:100%;object-fit:cover;
  filter:saturate(.72) contrast(1.06) brightness(.9);
}
.media-frame::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(180deg,rgba(6,12,22,0) 42%,rgba(6,12,22,.86) 100%);
}
.media-frame--wide{aspect-ratio:21/9}
.media-frame--tall{aspect-ratio:4/5}
.media-frame--square{aspect-ratio:1/1}
.media-frame__caption{
  position:absolute;left:0;right:0;bottom:0;z-index:1;
  padding:12px 16px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.02em;
  color:var(--steel-400);text-align:right;
}

/* ---------- prose ---------- */
.prose{max-width:38em}
.prose p{margin:0 0 1.2em;text-indent:0}
.prose p:last-child{margin-bottom:0}
.prose h2,.prose h3{margin:1.6em 0 .7em}
.prose-slab{
  background:var(--parchment);
  color:var(--ink-900);
  padding:clamp(22px,5vw,56px);
}
.prose-slab a{color:var(--ember);text-decoration:none;border-bottom:1px solid currentColor}

/* ---------- skip link ---------- */
.skip-link{
  position:fixed;top:-100px;left:12px;z-index:200;
  padding:10px 18px;
  font-family:var(--font-body);font-size:14px;font-weight:700;
  color:var(--ink-900);background:var(--signal);
  text-decoration:none;
  clip-path:polygon(0 0,calc(100% - 10px) 0,100% 10px,100% 100%,0 100%);
  transition:top var(--dur) var(--ease);
}
.skip-link:focus-visible{top:12px;outline:2px solid var(--mist-100);outline-offset:2px}

/* ---------- header: desktop rail ---------- */
.site-header{
  position:fixed;top:0;left:0;bottom:0;width:var(--rail);z-index:80;
  display:flex;flex-direction:column;
  background:var(--ink-800);
  border-right:1px solid var(--ink-700);
}
.site-header::before{
  content:"";position:absolute;top:0;right:0;width:2px;height:100%;
  background:repeating-linear-gradient(180deg,var(--ink-700) 0 12px,transparent 12px 26px);
  opacity:.7;pointer-events:none;
}
.header-brand-row{
  display:flex;flex-direction:column;align-items:center;gap:10px;
  padding:18px 8px 14px;
  border-bottom:1px solid var(--ink-700);
}
.brand{
  display:flex;flex-direction:column;align-items:center;gap:8px;
  text-decoration:none;
}
.brand-mark{
  width:26px;height:26px;flex:0 0 auto;
  background:var(--signal);
  clip-path:polygon(0 0,68% 0,100% 32%,100% 100%,32% 100%,0 68%);
  transition:background var(--dur) var(--ease);
}
.brand:hover .brand-mark{background:var(--track)}
.brand-word{
  font-family:var(--font-display);font-size:12px;letter-spacing:.06em;
  color:var(--mist-100);white-space:nowrap;
}
.nav-toggle{display:none}

.nav-drawer{display:flex;flex-direction:column;flex:1 1 auto;min-height:0}

.header-status{
  display:flex;flex-direction:column;align-items:center;gap:6px;
  padding:13px 6px;
  border-bottom:1px solid var(--ink-700);
  text-align:center;
}
.status-dot{
  width:7px;height:7px;border-radius:50%;
  background:var(--signal);
  box-shadow:0 0 0 3px rgba(61,242,192,.16);
}
.status-text{
  font-family:var(--font-mono);font-size:10px;line-height:1.35;letter-spacing:.01em;
  color:var(--steel-400);
}
.status-hint{
  display:block;max-height:0;opacity:0;overflow:hidden;
  font-family:var(--font-mono);font-size:10px;line-height:1.4;color:var(--amber);
  transition:max-height var(--dur) var(--ease),opacity var(--dur) var(--ease);
}
.header-status:hover .status-hint{max-height:44px;opacity:1}

.site-nav{flex:1 1 auto;min-height:0;overflow-y:auto;padding-block:12px;scrollbar-width:none}
.site-nav::-webkit-scrollbar{width:0;height:0}
.nav-list{display:flex;flex-direction:column;align-items:center;gap:0}
.nav-item{display:flex;justify-content:center;width:100%}
.nav-link{
  position:relative;
  display:grid;place-items:center;
  width:64px;min-height:60px;
  padding:10px 0;
  writing-mode:vertical-rl;
  font-family:var(--font-body);font-size:13px;line-height:1.2;letter-spacing:.12em;
  color:var(--steel-400);text-decoration:none;
  transition:color var(--dur) var(--ease),transform var(--dur) var(--ease),background var(--dur) var(--ease);
}
.nav-link::before{
  content:"";position:absolute;left:2px;top:50%;
  width:2px;height:0;background:var(--signal);
  transform:translateY(-50%);
  transition:height var(--dur) var(--ease);
}
.nav-link:hover{color:var(--mist-100);transform:translateX(-2px)}
.nav-link:hover::before{height:52%}
.nav-link[aria-current="page"]{color:var(--signal)}
.nav-link[aria-current="page"]::before{height:100%}

.header-foot{
  margin-top:auto;
  display:flex;flex-direction:column;align-items:center;gap:12px;
  padding:14px 6px 18px;
  border-top:1px solid var(--ink-700);
}
.nav-cta{
  writing-mode:vertical-rl;
  padding:10px 5px;
  font-family:var(--font-display);font-size:13px;letter-spacing:.16em;
  color:var(--track);text-decoration:none;
  box-shadow:inset 0 0 0 1px rgba(255,106,43,.4);
  transition:background var(--dur) var(--ease),color var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.nav-cta:hover{background:var(--track);color:var(--ink-900);box-shadow:inset 0 0 0 1px var(--track)}
.nav-search{
  display:flex;flex-direction:column;align-items:center;gap:6px;
  font-family:var(--font-mono);font-size:10px;letter-spacing:.02em;
  color:var(--steel-400);text-decoration:none;
  transition:color var(--dur) var(--ease);
}
.nav-search:hover{color:var(--signal)}
.nav-search__ring{
  position:relative;width:13px;height:13px;border:1.5px solid currentColor;border-radius:50%;
}
.nav-search__ring::after{
  content:"";position:absolute;right:-4px;bottom:-3px;
  width:6px;height:1.5px;background:currentColor;transform:rotate(45deg);
}

.sync-meter{
  position:absolute;top:0;right:0;bottom:0;width:2px;
  background:var(--ink-700);pointer-events:none;
}
.sync-meter__fill{
  display:block;width:100%;height:var(--sync);
  background:linear-gradient(180deg,var(--signal),var(--teal-700));
}

/* ---------- footer ---------- */
.site-footer{
  margin-top:clamp(40px,8vw,96px);
  background:var(--ink-800);
  border-top:1px solid var(--ink-700);
}
.footer-inner{
  max-width:var(--shell-max);margin-inline:auto;
  padding:14px var(--gutter);
  display:grid;
  grid-template-columns:minmax(0,1.1fr) minmax(0,1fr) minmax(0,1.1fr);
  gap:clamp(12px,2.4vw,32px);
  align-items:center;
}
.footer-col{display:flex;flex-direction:column;gap:4px;min-width:0}
.footer-col--brand{gap:3px}
.footer-brand{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--font-display);font-size:15px;letter-spacing:.05em;
  color:var(--mist-100);text-decoration:none;
}
.footer-brand__mark{
  width:12px;height:12px;flex:0 0 auto;background:var(--signal);
  clip-path:polygon(0 0,68% 0,100% 32%,100% 100%,32% 100%,0 68%);
}
.footer-tagline{font-size:12px;line-height:1.5;color:var(--steel-400)}
.footer-icp{
  font-family:var(--font-mono);font-size:11px;letter-spacing:.02em;
  color:var(--steel-400);opacity:.7;
}
.footer-col--nav{flex-direction:row;flex-wrap:wrap;gap:4px 16px}
.footer-link{
  font-size:12px;line-height:1.6;color:var(--steel-400);text-decoration:none;
  transition:color var(--dur) var(--ease);
}
.footer-link:hover{color:var(--track)}
.footer-col--contact{
  align-items:flex-end;text-align:right;
  font-family:var(--font-mono);font-size:11px;line-height:1.6;letter-spacing:.02em;
  color:var(--steel-400);
}
.footer-contact__line{display:block;word-break:break-all}
.footer-contact__line--note{opacity:.72}
.footer-legal{border-top:1px solid var(--ink-700)}
.footer-legal__inner{
  max-width:var(--shell-max);margin-inline:auto;
  padding:7px var(--gutter);
  display:flex;flex-wrap:wrap;gap:4px 18px;
  font-family:var(--font-mono);font-size:10.5px;letter-spacing:.02em;
  color:var(--steel-400);opacity:.78;
}

/* ---------- responsive ---------- */
@media (max-width:1024px){
  .grid--3{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:900px){
  .site-header{
    top:0;left:0;right:0;bottom:auto;
    width:100%;height:var(--topbar);
    flex-direction:row;align-items:center;
    border-right:0;border-bottom:1px solid var(--ink-700);
    background:rgba(12,23,39,.97);
    backdrop-filter:blur(10px);
  }
  .site-header::before{display:none}
  .header-brand-row{
    flex-direction:row;align-items:center;justify-content:space-between;
    width:100%;padding:0 16px;gap:12px;border-bottom:0;
  }
  .brand{flex-direction:row;gap:10px}
  .brand-word{font-size:15px}
  .nav-toggle{
    display:inline-flex;align-items:center;justify-content:center;
    width:42px;height:34px;
    color:var(--mist-100);
    box-shadow:inset 0 0 0 1px var(--ink-700);
    clip-path:polygon(0 0,calc(100% - 9px) 0,100% 9px,100% 100%,9px 100%,0 calc(100% - 9px));
    cursor:pointer;
    transition:color var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
  }
  .nav-toggle:hover{color:var(--signal);box-shadow:inset 0 0 0 1px var(--signal)}
  .nav-toggle__bars{display:flex;flex-direction:column;gap:4px;width:18px}
  .nav-toggle__bars span{display:block;height:1.5px;background:currentColor;width:100%}
  [data-site-header][data-open] .nav-toggle{color:var(--signal);box-shadow:inset 0 0 0 1px var(--signal)}

  .nav-drawer{
    position:fixed;top:var(--topbar);left:0;bottom:0;
    width:min(86vw,340px);z-index:81;
    display:flex;flex-direction:column;
    padding:18px 20px 26px;
    background:var(--ink-900);
    border-right:1px solid var(--ink-700);
    transform:translateX(-101%);
    visibility:hidden;
    overflow-y:auto;
    transition:transform var(--dur) var(--ease),visibility var(--dur) var(--ease);
  }
  [data-site-header][data-open] .nav-drawer{transform:translateX(0);visibility:visible}

  body[data-nav-open]{overflow:hidden}
  body[data-nav-open]::after{
    content:"";position:fixed;inset:0;z-index:70;
    background:rgba(6,12,22,.68);
  }

  .header-status{
    flex-direction:row;align-items:center;gap:10px;
    padding:12px 0;border-bottom:1px solid var(--ink-700);text-align:left;
  }
  .status-text{font-size:12px}
  .status-hint{max-height:none;opacity:1;margin-left:auto;font-size:11px}

  .site-nav{flex:0 0 auto;overflow:visible;padding-block:6px}
  .nav-list{align-items:stretch;gap:0}
  .nav-item{width:100%}
  .nav-link{
    display:flex;align-items:center;justify-content:flex-start;
    width:100%;min-height:0;
    writing-mode:horizontal-tb;
    padding:14px 14px;
    font-size:17px;letter-spacing:.01em;
    border-bottom:1px solid var(--ink-700);
    transform:none;
  }
  .nav-link::before{left:0;top:50%;width:3px;height:0;transform:translateY(-50%)}
  .nav-link:hover{transform:none;background:var(--ink-800)}
  .nav-link:hover::before{height:56%}
  .nav-link[aria-current="page"]::before{height:100%}

  .header-foot{
    margin-top:auto;flex-direction:row;align-items:center;justify-content:space-between;
    gap:12px;padding:18px 0 0;border-top:1px solid var(--ink-700);
  }
  .nav-cta{writing-mode:horizontal-tb;padding:10px 18px;font-size:14px}

  .sync-meter{top:auto;left:0;right:0;bottom:0;width:auto;height:2px}
  .sync-meter__fill{height:100%;width:var(--sync);background:var(--signal)}

  .footer-inner{grid-template-columns:1fr;padding-block:20px;gap:12px}
  .footer-col--contact{align-items:flex-start;text-align:left}
  .footer-col--nav{gap:4px 18px}
  .grid--2,.grid--3{grid-template-columns:1fr}
}
@media (max-width:560px){
  .breadcrumbs ol{font-size:11px}
  .footer-legal__inner{font-size:10px;gap:3px 12px}
}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
}