:root{
  --night-900:#0B1424;
  --night-800:#12203A;
  --night-700:#182A47;
  --rock:#2A3140;
  --lake:#1FB5A9;
  --barley:#D6A43B;
  --flare:#FF6B1A;
  --clay:#A85C3C;
  --moss:#5F7D5A;
  --bone:#F2EDE3;
  --mist:#8E9AAD;

  --font-display:"Barlow Condensed","Oswald","Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --font-text:"Inter","Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-num:"JetBrains Mono","Roboto Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  --line:1px solid var(--rock);
  --gutter:clamp(1.1rem,3.6vw,3.5rem);
  --maxw:1480px;
  --body-size:clamp(1rem,0.96rem + 0.22vw,1.1rem);
}

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

body{
  background:var(--night-900);
  color:var(--bone);
  font-family:var(--font-text);
  font-size:var(--body-size);
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}

h1,h2,h3,h4{
  font-family:var(--font-display);
  font-weight:600;
  line-height:1.03;
  letter-spacing:-0.02em;
}
h1{font-size:clamp(2.4rem,5.6vw,4.8rem)}
h2{font-size:clamp(1.7rem,3.2vw,2.8rem)}
h3{font-size:clamp(1.22rem,1.9vw,1.6rem)}
h4{font-size:clamp(1.05rem,1.4vw,1.2rem);letter-spacing:0}
strong{font-weight:700}
p{max-width:68ch}
::selection{background:var(--lake);color:var(--night-900)}

:focus-visible{
  outline:2px solid var(--lake);
  outline-offset:2px;
  box-shadow:0 0 0 5px rgba(255,107,26,.38);
}

.skip-link{
  position:absolute;
  top:0;
  left:0;
  z-index:200;
  transform:translateY(-140%);
  background:var(--lake);
  color:var(--night-900);
  padding:.7rem 1.15rem;
  font-family:var(--font-num);
  font-size:.78rem;
  letter-spacing:.16em;
  font-weight:700;
  transition:transform .16s ease;
}
.skip-link:focus{transform:translateY(0)}

/* ---------- layout utilities ---------- */
.container{
  width:100%;
  max-width:var(--maxw);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.section{padding-block:clamp(2.4rem,5.5vw,4.8rem)}
.section-head{
  display:flex;
  flex-wrap:wrap;
  align-items:flex-end;
  justify-content:space-between;
  gap:.9rem 1.5rem;
  padding-bottom:1rem;
  margin-bottom:clamp(1.4rem,3vw,2.4rem);
  border-bottom:var(--line);
}
.section-title{margin:0}
.rule{height:1px;border:0;background:var(--rock);margin:0}
.rule-strong{height:1px;border:0;margin:0;background:linear-gradient(90deg,var(--lake),var(--rock) 45%,var(--rock))}
.grid{display:grid;gap:var(--grid-gap,1.5rem)}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.stack > * + *{margin-top:var(--stack-gap,1rem)}

/* ---------- index labels ---------- */
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:.5rem;
  font-family:var(--font-num);
  font-size:.68rem;
  letter-spacing:.3em;
  text-transform:uppercase;
  color:var(--barley);
}
.eyebrow::before{content:"[";color:var(--lake);letter-spacing:0}
.eyebrow::after{content:"]";color:var(--lake);letter-spacing:0}

.index-tag{
  display:inline-block;
  padding:.22rem .5rem;
  border:1px solid var(--rock);
  font-family:var(--font-num);
  font-size:.66rem;
  letter-spacing:.2em;
  color:var(--mist);
}

.tag{
  display:inline-flex;
  align-items:center;
  gap:.35rem;
  padding:.2rem .55rem;
  border:1px solid var(--rock);
  background:var(--night-800);
  color:var(--bone);
  font-family:var(--font-num);
  font-size:.66rem;
  letter-spacing:.14em;
  line-height:1.5;
}
.tag-lake{border-color:var(--lake);color:var(--lake)}
.tag-barley{border-color:var(--barley);color:var(--barley)}
.tag-flare{border-color:var(--flare);color:var(--flare)}
.tag-clay{border-color:var(--clay);color:#D68F6C}
.tag-moss{border-color:var(--moss);color:#8EAE88}

.data-value{
  display:inline-block;
  font-family:var(--font-num);
  font-size:clamp(1.5rem,2.8vw,2.3rem);
  font-weight:700;
  line-height:1;
  letter-spacing:-.02em;
  color:var(--flare);
}
.note{
  font-size:.82rem;
  line-height:1.6;
  color:var(--mist);
  max-width:56ch;
}
.lead{
  font-size:clamp(1.05rem,1.5vw,1.25rem);
  line-height:1.62;
  max-width:60ch;
}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:.5rem;
  padding:.72rem 1.15rem;
  border:1px solid var(--rock);
  background:transparent;
  color:var(--bone);
  font-family:var(--font-text);
  font-size:.9rem;
  font-weight:600;
  line-height:1.2;
  letter-spacing:.02em;
  border-radius:0;
  cursor:pointer;
  transition:background-color .16s ease,color .16s ease,border-color .16s ease;
}
.btn:hover{background:var(--night-800);border-color:var(--lake);color:var(--bone)}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--barley);border-color:var(--barley);color:var(--night-900);font-weight:700}
.btn-primary:hover{background:var(--flare);border-color:var(--flare);color:var(--night-900)}
.btn-ghost{border-color:var(--lake);color:var(--lake)}
.btn-ghost:hover{background:var(--lake);border-color:var(--lake);color:var(--night-900)}
.btn-sm{padding:.55rem .85rem;font-size:.8rem}

/* ---------- breadcrumb ---------- */
.breadcrumb{
  padding-block:.85rem;
  border-bottom:var(--line);
  font-family:var(--font-num);
  font-size:.7rem;
  letter-spacing:.12em;
  color:var(--mist);
}
.breadcrumb-list{display:flex;flex-wrap:wrap;align-items:center;gap:.5rem}
.breadcrumb-item{display:flex;align-items:center;gap:.5rem}
.breadcrumb-item + .breadcrumb-item::before{content:"/";color:var(--rock)}
.breadcrumb-item a{color:var(--mist)}
.breadcrumb-item a:hover{color:var(--lake)}
.breadcrumb-item[aria-current="page"]{color:var(--bone)}

/* ---------- prose ---------- */
.prose{max-width:70ch;font-size:1.02rem;line-height:1.78}
.prose > * + *{margin-top:1.05em}
.prose h2{margin-top:1.9em;margin-bottom:.6em;font-size:clamp(1.5rem,2.4vw,2rem)}
.prose h3{margin-top:1.6em;margin-bottom:.5em}
.prose ul{padding-left:0;list-style:none}
.prose ul li{position:relative;padding-left:1.5rem}
.prose ul li + li{margin-top:.45em}
.prose ul li::before{
  content:"";
  position:absolute;
  left:0;
  top:.78em;
  width:10px;
  height:1px;
  background:var(--lake);
}
.prose a{color:var(--lake);border-bottom:1px solid rgba(31,181,169,.45)}
.prose a:hover{border-bottom-color:var(--flare);color:var(--bone)}
.prose blockquote{
  border-left:2px solid var(--barley);
  padding:.2rem 0 .2rem 1.1rem;
  color:var(--bone);
  font-family:var(--font-display);
  font-size:1.15em;
}

/* ---------- media container ---------- */
.media-frame{
  position:relative;
  display:block;
  overflow:hidden;
  aspect-ratio:16/9;
  border:1px solid var(--rock);
  background:
    repeating-linear-gradient(135deg,rgba(42,49,64,.55) 0 1px,transparent 1px 16px),
    linear-gradient(158deg,var(--night-800) 0%,var(--night-900) 72%);
}
.media-frame::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background:
    linear-gradient(90deg,rgba(31,181,169,.16),transparent 42%),
    repeating-linear-gradient(0deg,rgba(242,237,227,.045) 0 1px,transparent 1px 44px),
    repeating-linear-gradient(90deg,rgba(242,237,227,.045) 0 1px,transparent 1px 44px);
}
.media-frame img{width:100%;height:100%;object-fit:cover}
.media-frame--wide{aspect-ratio:21/9}
.media-frame--tall{aspect-ratio:4/5}
.media-caption{
  margin-top:.6rem;
  font-family:var(--font-num);
  font-size:.66rem;
  letter-spacing:.14em;
  color:var(--mist);
}

/* ================= HEADER ================= */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:var(--night-900);
  border-bottom:var(--line);
  color:var(--bone);
}
.site-header::after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  bottom:-1px;
  height:1px;
  background:linear-gradient(90deg,var(--lake),transparent 32%,transparent 68%,var(--barley));
  opacity:.55;
  pointer-events:none;
}
.site-header[data-scrolled]{box-shadow:0 16px 34px -28px rgba(0,0,0,.95)}

.scroll-progress{
  position:fixed;
  top:0;
  left:0;
  width:100%;
  height:2px;
  transform:scaleX(0);
  transform-origin:0 50%;
  background:linear-gradient(90deg,var(--lake),var(--barley) 55%,var(--flare));
  z-index:80;
  pointer-events:none;
}

.header-edge{display:none}

.header-frame{
  display:flex;
  align-items:center;
  gap:clamp(.75rem,2vw,2rem);
  max-width:var(--maxw);
  margin-inline:auto;
  padding:.7rem var(--gutter);
}

.brand{
  display:flex;
  align-items:center;
  gap:.7rem;
  flex:0 0 auto;
}
.brand-mark{
  position:relative;
  display:grid;
  place-items:center;
  width:2.5rem;
  height:2.5rem;
  border:1px solid var(--lake);
  color:var(--lake);
  font-family:var(--font-display);
  font-size:1.2rem;
  font-weight:700;
  line-height:1;
}
.brand-mark::after{
  content:"";
  position:absolute;
  inset:3px;
  border:1px solid rgba(31,181,169,.32);
  pointer-events:none;
}
.brand-text{display:flex;flex-direction:column;gap:.12rem;line-height:1.15}
.brand-name{
  font-family:var(--font-display);
  font-size:1.14rem;
  font-weight:700;
  letter-spacing:.03em;
}
.brand-tagline{
  font-family:var(--font-num);
  font-size:.63rem;
  letter-spacing:.14em;
  color:var(--mist);
  white-space:nowrap;
}

.header-badge{
  display:none;
  align-items:center;
  gap:.45rem;
  max-width:none;
  padding:.24rem .6rem;
  border:1px solid var(--rock);
  font-family:var(--font-num);
  font-size:.62rem;
  letter-spacing:.14em;
  color:var(--barley);
  white-space:nowrap;
}
.badge-dot{
  width:5px;
  height:5px;
  background:var(--flare);
  box-shadow:0 0 0 2px rgba(255,107,26,.22);
}

/* nav */
.site-nav{margin-left:auto}
.nav-list{display:flex;align-items:stretch}
.nav-item{display:flex}
.nav-item + .nav-item{border-left:var(--line)}
.nav-link{
  position:relative;
  display:flex;
  flex-direction:column;
  justify-content:center;
  gap:.16rem;
  padding:.38rem clamp(.5rem,1.05vw,.95rem);
  font-size:.94rem;
  color:var(--bone);
  transition:background-color .16s ease,color .16s ease;
}
.nav-index{
  font-family:var(--font-num);
  font-size:.6rem;
  letter-spacing:.16em;
  color:var(--mist);
  transition:color .16s ease;
}
.nav-link:hover{background:var(--night-800)}
.nav-link:hover .nav-index{color:var(--lake)}
.nav-link[aria-current="page"]{background:var(--night-800)}
.nav-link[aria-current="page"] .nav-index{color:var(--barley)}
.nav-link[aria-current="page"]::after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  bottom:0;
  height:2px;
  background:var(--flare);
}

.header-actions{flex:0 0 auto;display:flex;align-items:center;gap:.6rem}

/* toggle */
.nav-toggle{
  display:none;
  align-items:center;
  gap:.55rem;
  margin-left:auto;
  padding:.5rem .7rem;
  border:1px solid var(--rock);
  color:var(--bone);
  cursor:pointer;
  transition:border-color .16s ease,color .16s ease;
}
.nav-toggle:hover{border-color:var(--lake)}
.nav-toggle-icon{
  position:relative;
  display:block;
  width:16px;
  height:11px;
  flex:0 0 auto;
}
.nav-toggle-bar{
  position:absolute;
  left:0;
  width:16px;
  height:1px;
  background:currentColor;
  transition:transform .18s ease,opacity .18s ease;
}
.nav-toggle-bar:nth-child(1){top:0}
.nav-toggle-bar:nth-child(2){top:5px}
.nav-toggle-bar:nth-child(3){top:10px}
.nav-toggle-label{
  font-family:var(--font-num);
  font-size:.62rem;
  letter-spacing:.2em;
  color:var(--mist);
  transition:color .16s ease;
}
.site-header[data-open] .nav-toggle{border-color:var(--lake);color:var(--lake)}
.site-header[data-open] .nav-toggle-label{color:var(--lake)}
.site-header[data-open] .nav-toggle-bar:nth-child(1){transform:translateY(5px) rotate(45deg)}
.site-header[data-open] .nav-toggle-bar:nth-child(2){opacity:0}
.site-header[data-open] .nav-toggle-bar:nth-child(3){transform:translateY(-5px) rotate(-45deg)}

/* ================= FOOTER ================= */
.site-footer{
  position:relative;
  background:var(--night-800);
  color:var(--bone);
  border-top:var(--line);
  overflow:hidden;
}
.footer-rail{
  height:5px;
  background:repeating-linear-gradient(90deg,var(--rock) 0 1px,transparent 1px 26px);
}
.footer-rail::after{
  content:"";
  display:block;
  height:1px;
  background:linear-gradient(90deg,var(--lake),transparent 55%,var(--barley));
  opacity:.5;
}
.footer-frame{
  max-width:var(--maxw);
  margin-inline:auto;
  padding:clamp(2rem,4.5vw,3.4rem) var(--gutter) 1.4rem;
}
.footer-grid{display:grid;gap:2rem;grid-template-columns:1fr}

.footer-mark{
  display:inline-grid;
  place-items:center;
  width:2.9rem;
  height:2.9rem;
  border:1px solid var(--lake);
  color:var(--lake);
  font-family:var(--font-display);
  font-size:1.1rem;
  font-weight:700;
  line-height:1;
}
.footer-name{
  margin-top:.85rem;
  font-family:var(--font-display);
  font-size:1.5rem;
  font-weight:700;
  letter-spacing:.03em;
  max-width:none;
}
.footer-descriptor{
  margin-top:.3rem;
  font-family:var(--font-num);
  font-size:.66rem;
  letter-spacing:.28em;
  color:var(--barley);
  max-width:none;
}

.footer-col-title{
  padding-bottom:.6rem;
  margin-bottom:.9rem;
  border-bottom:var(--line);
  font-family:var(--font-num);
  font-size:.66rem;
  font-weight:400;
  letter-spacing:.28em;
  text-transform:uppercase;
  color:var(--mist);
}
.footer-links{display:flex;flex-direction:column;gap:.45rem}
.footer-links a{
  display:inline-flex;
  align-items:center;
  gap:.55rem;
  font-size:.92rem;
  color:var(--bone);
  transition:color .15s ease;
}
.footer-links a::before{
  content:"";
  width:10px;
  height:1px;
  background:var(--rock);
  transition:background-color .15s ease,width .15s ease;
}
.footer-links a:hover{color:var(--lake)}
.footer-links a:hover::before{background:var(--flare);width:18px}

.footer-contact{display:flex;flex-direction:column;gap:.6rem}
.contact-row{
  display:grid;
  grid-template-columns:3.2em minmax(0,1fr);
  gap:.6rem;
  font-size:.9rem;
  line-height:1.55;
  max-width:none;
}
.contact-label{
  padding-top:.18rem;
  font-family:var(--font-num);
  font-size:.64rem;
  letter-spacing:.14em;
  color:var(--mist);
}
.contact-value{color:var(--bone);word-break:break-word}
.footer-note{
  margin-top:1rem;
  padding-left:.75rem;
  border-left:2px solid var(--clay);
  font-size:.78rem;
  line-height:1.62;
  color:var(--mist);
  max-width:44ch;
}

.footer-base{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:.7rem 1.4rem;
  margin-top:clamp(1.6rem,4vw,2.6rem);
  padding-top:1.1rem;
  border-top:var(--line);
  font-family:var(--font-num);
  font-size:.72rem;
  letter-spacing:.08em;
  color:var(--mist);
}
.footer-copy,.icp{max-width:none}
.legal-links{display:flex;flex-wrap:wrap;gap:1.1rem;margin-left:auto}
.legal-links a{color:var(--mist);transition:color .15s ease}
.legal-links a:hover{color:var(--lake)}

/* ================= RESPONSIVE ================= */
@media (min-width:560px){
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (min-width:900px){
  .header-edge{
    display:flex;
    align-items:center;
    gap:.8rem;
    max-width:var(--maxw);
    margin-inline:auto;
    padding:.34rem var(--gutter) 0;
    font-family:var(--font-num);
    font-size:.6rem;
    letter-spacing:.42em;
    text-transform:uppercase;
    color:var(--mist);
  }
  .edge-label{white-space:nowrap}
  .header-edge::after{
    content:"";
    flex:1;
    height:1px;
    background:var(--rock);
  }
}
@media (min-width:1024px){
  .footer-grid{grid-template-columns:1.5fr .9fr .9fr 1.6fr}
}
@media (min-width:1180px){
  .header-badge{display:inline-flex}
}
@media (min-width:1120px){
  .site-nav{margin-left:auto}
}
@media (max-width:1119px){
  .site-nav{
    position:absolute;
    top:100%;
    left:0;
    right:0;
    margin-left:0;
    max-height:70vh;
    overflow-y:auto;
    padding:.35rem 0 .8rem;
    background:var(--night-800);
    border-block:var(--line);
    opacity:0;
    visibility:hidden;
    transform:translateY(-8px);
    transition:opacity .18s ease,transform .18s ease,visibility .18s;
  }
  .site-header[data-open] .site-nav{
    opacity:1;
    visibility:visible;
    transform:translateY(0);
  }
  .nav-list{flex-direction:column;align-items:stretch}
  .nav-item + .nav-item{
    border-left:0;
    border-top:var(--line);
  }
  .nav-link{
    flex-direction:row;
    align-items:center;
    gap:.9rem;
    padding:.85rem var(--gutter);
    font-size:1rem;
  }
  .nav-index{font-size:.7rem}
  .nav-link[aria-current="page"]::after{
    left:0;
    right:auto;
    top:0;
    bottom:0;
    width:3px;
    height:auto;
  }
  .nav-toggle{display:inline-flex}
  .header-frame{padding-block:.62rem}
}
@media (min-width:1120px) and (max-width:1339px){
  .brand-tagline{display:none}
}
@media (max-width:639px){
  .brand-tagline{display:none}
  .brand-mark{width:2.15rem;height:2.15rem;font-size:1rem}
  .brand-name{font-size:1rem}
  .btn-sm{padding:.5rem .68rem;font-size:.78rem}
  .footer-base{flex-direction:column;align-items:flex-start}
  .legal-links{margin-left:0}
}
@media (max-width:420px){
  .header-actions .btn-primary{padding:.45rem .55rem;font-size:.72rem}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  .skip-link,.nav-toggle-bar,.scroll-progress{transition:none !important}
}