:root{
  --ink:#070B09;
  --ink-soft:#0E241C;
  --field:#123D2E;
  --lime:#C9FF3F;
  --orange:#FF7A3D;
  --blue:#45A3FF;
  --mist:#E8F2EC;
  --sage:#8FA99C;
  --paper:#F4F0E6;
  --line:#2E4A3E;

  --font-sans:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-mono:"JetBrains Mono","Roboto Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  --header-h:5.25rem;
  --wrap-max:1320px;
  --gutter:clamp(1.1rem,4vw,3rem);
  --radius:2px;
  --ease:cubic-bezier(.22,.61,.36,1);
}

@media (max-width:900px){
  :root{ --header-h:4rem; }
}

*,*::before,*::after{ box-sizing:border-box; }

html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
  background-color:var(--ink);
  background-image:
    linear-gradient(rgba(46,74,62,.14) 1px, transparent 1px),
    linear-gradient(90deg, rgba(46,74,62,.14) 1px, transparent 1px);
  background-size:72px 72px;
  background-attachment:fixed;
}

body{
  margin:0;
  padding-top:var(--header-h);
  background:transparent;
  color:var(--mist);
  font-family:var(--font-sans);
  font-size:1rem;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}

body,h1,h2,h3,h4,p,ul,ol,figure,blockquote,dl,dd{ margin:0; }
ul,ol{ padding:0; list-style:none; }
img,svg,video{ display:block; max-width:100%; }
a{ color:inherit; text-decoration:none; }
button{ font:inherit; color:inherit; background:none; border:0; padding:0; cursor:pointer; }
p{ text-wrap:pretty; }

h1,h2,h3,h4{
  font-family:var(--font-sans);
  font-weight:800;
  line-height:1.14;
  letter-spacing:-.03em;
  color:var(--mist);
  text-wrap:balance;
}

:focus-visible{
  outline:2px solid var(--lime);
  outline-offset:3px;
  border-radius:1px;
}

.visually-hidden{
  position:absolute;
  width:1px;height:1px;
  padding:0;margin:-1px;
  overflow:hidden;
  clip:rect(0 0 0 0);
  clip-path:inset(50%);
  white-space:nowrap;
  border:0;
}

/* ---------- skip link ---------- */
.skip-link{
  position:fixed;
  top:.5rem;left:.5rem;
  z-index:400;
  padding:.65rem 1.1rem;
  background:var(--lime);
  color:#0A1409;
  font-size:.85rem;
  font-weight:800;
  letter-spacing:-.01em;
  border-radius:var(--radius);
  transform:translateY(-180%);
  transition:transform .2s var(--ease);
}
.skip-link:focus{ transform:none; }

/* ---------- layout utilities ---------- */
.wrap{
  width:100%;
  max-width:var(--wrap-max);
  margin-inline:auto;
  padding-inline:var(--gutter);
}

.section{ padding-block:clamp(2.5rem,6vw,5rem); }

.hairline{
  height:1px;
  border:0;
  background:linear-gradient(90deg,var(--line),rgba(46,74,62,0));
}

.top-bleed{ margin-top:calc(var(--header-h) * -1); }

.grid{
  display:grid;
  gap:clamp(1rem,2.5vw,1.75rem);
}
.grid--rail{
  grid-template-columns:minmax(0,3fr) minmax(0,9fr);
  align-items:start;
}
@media (max-width:900px){
  .grid--rail{ grid-template-columns:minmax(0,1fr); }
}

/* ---------- typographic bits ---------- */
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:.55rem;
  font-family:var(--font-mono);
  font-size:.72rem;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--lime);
}
.eyebrow::before{
  content:"";
  width:1.6rem;
  height:1px;
  background:currentColor;
}

.num{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  letter-spacing:.02em;
}

.meta{
  font-family:var(--font-mono);
  font-size:.76rem;
  letter-spacing:.05em;
  color:var(--sage);
}

/* ---------- tags ---------- */
.tag{
  display:inline-flex;
  align-items:center;
  gap:.35rem;
  padding:.2rem .5rem;
  font-size:.72rem;
  font-weight:700;
  line-height:1.5;
  letter-spacing:.04em;
  border:1px solid currentColor;
  border-radius:1px;
}
.tag--lime{ color:var(--lime); background:rgba(201,255,63,.08); }
.tag--orange{ color:var(--orange); background:rgba(255,122,61,.1); }
.tag--blue{ color:var(--blue); background:rgba(69,163,255,.1); }

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  gap:.55rem;
  padding:.85rem 1.35rem;
  font-size:.94rem;
  font-weight:700;
  letter-spacing:-.01em;
  line-height:1.2;
  border:1px solid transparent;
  border-radius:var(--radius);
  transition:transform .18s var(--ease), background-color .18s var(--ease), color .18s var(--ease), border-color .18s var(--ease);
}
.btn:hover{ transform:translateY(-2px); }
.btn:active{ transform:translateY(0); }
.btn--primary{ background:var(--lime); color:#0A1409; }
.btn--primary:hover{ background:#DBFF72; }
.btn--ghost{ border-color:var(--line); color:var(--mist); }
.btn--ghost:hover{ border-color:var(--lime); color:var(--lime); }
.btn--blue{ background:var(--blue); color:#04121F; }
.btn--blue:hover{ background:#6CBAFF; }

/* ---------- breadcrumbs ---------- */
.breadcrumbs{
  padding-block:1rem;
  border-bottom:1px solid rgba(46,74,62,.6);
}
.breadcrumb-list{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:.45rem;
  font-size:.8rem;
  color:var(--sage);
}
.breadcrumb-item{
  display:inline-flex;
  align-items:center;
  gap:.45rem;
}
.breadcrumb-item + .breadcrumb-item::before{
  content:"/";
  color:var(--line);
}
.breadcrumb-link{ color:var(--sage); transition:color .18s var(--ease); }
.breadcrumb-link:hover{ color:var(--lime); }
.breadcrumb-current{ color:var(--mist); font-weight:600; }

/* ---------- section head ---------- */
.section-head{
  display:flex;
  flex-wrap:wrap;
  align-items:flex-end;
  gap:.85rem 1.6rem;
  padding-bottom:1rem;
  margin-bottom:clamp(1.4rem,3vw,2.4rem);
  border-bottom:1px solid var(--line);
}
.section-num{
  font-family:var(--font-mono);
  font-size:clamp(1.7rem,3.2vw,2.7rem);
  font-weight:700;
  line-height:1;
  letter-spacing:-.03em;
  color:var(--lime);
}
.section-title{
  font-size:clamp(1.35rem,2.6vw,2.05rem);
  font-weight:800;
}
.section-note{
  margin-left:auto;
  max-width:40ch;
  font-size:.85rem;
  line-height:1.7;
  color:var(--sage);
}

/* ---------- paper card ---------- */
.paper-card{
  padding:clamp(1rem,2vw,1.5rem);
  background:var(--paper);
  color:#0B2018;
  border:1px solid #0B2018;
  border-radius:1px;
  box-shadow:6px 6px 0 rgba(201,255,63,.82);
}
.paper-card h3,.paper-card h4{ color:#0B2018; }
.paper-card .meta{ color:#4A6356; }

/* ---------- legend index ---------- */
.index-legend{
  display:flex;
  flex-wrap:wrap;
  gap:.5rem 1.35rem;
  padding:.7rem 0;
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
  font-size:.78rem;
  color:var(--sage);
}
.legend-item{
  display:inline-flex;
  align-items:center;
  gap:.45rem;
}
.legend-key{
  flex:none;
  width:.6rem;
  height:.6rem;
  border-radius:50%;
}
.legend-key--lime{ background:var(--lime); }
.legend-key--orange{ background:var(--orange); }
.legend-key--blue{ background:var(--blue); }

/* ---------- media frame ---------- */
.media-frame{
  position:relative;
  overflow:hidden;
  aspect-ratio:16 / 9;
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:linear-gradient(150deg,var(--field),var(--ink) 72%);
}
.media-frame img{
  width:100%;
  height:100%;
  object-fit:cover;
}
.media-frame::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background-image:
    linear-gradient(rgba(201,255,63,.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(201,255,63,.07) 1px, transparent 1px);
  background-size:48px 48px;
}
.media-frame--wide{ aspect-ratio:21 / 9; }
.media-frame--tall{ aspect-ratio:3 / 4; }

/* ---------- header ---------- */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:200;
  background:rgba(7,11,9,.38);
  border-bottom:1px solid transparent;
  -webkit-backdrop-filter:saturate(130%) blur(6px);
  backdrop-filter:saturate(130%) blur(6px);
  transition:background-color .28s var(--ease), border-color .28s var(--ease), box-shadow .28s var(--ease);
}
.site-header.is-scrolled{
  background:rgba(14,36,28,.97);
  border-bottom-color:var(--line);
  box-shadow:0 14px 34px -26px rgba(0,0,0,.95);
}

.header-inner{
  max-width:calc(var(--wrap-max) + var(--gutter) * 2);
  margin-inline:auto;
  min-height:var(--header-h);
  padding-inline:var(--gutter);
  display:flex;
  align-items:center;
  gap:clamp(.6rem,1.6vw,1.5rem);
}

.brand{
  display:inline-flex;
  align-items:center;
  gap:.7rem;
  flex:none;
}
.brand-mark{
  display:grid;
  place-items:center;
  width:2.35rem;
  height:2.35rem;
  font-family:var(--font-mono);
  font-size:.95rem;
  font-weight:800;
  letter-spacing:-.03em;
  color:#0A1409;
  background:var(--lime);
  clip-path:polygon(0 0,100% 0,100% 72%,72% 100%,0 100%);
  transition:background-color .2s var(--ease);
}
.brand:hover .brand-mark{ background:#DBFF72; }
.brand-text{
  display:flex;
  flex-direction:column;
  line-height:1.16;
}
.brand-name{
  font-size:1.02rem;
  font-weight:800;
  letter-spacing:-.02em;
  color:var(--mist);
}
.brand-tagline{
  font-size:.64rem;
  letter-spacing:.16em;
  color:var(--sage);
  white-space:nowrap;
}

.header-stamp{
  display:inline-flex;
  align-items:center;
  gap:.45rem;
  padding:.32rem .6rem;
  font-family:var(--font-mono);
  font-size:.7rem;
  line-height:1.4;
  letter-spacing:.03em;
  color:var(--sage);
  border:1px solid var(--line);
  border-radius:1px;
  white-space:nowrap;
}
.stamp-dot{
  flex:none;
  width:.4rem;
  height:.4rem;
  border-radius:50%;
  background:var(--lime);
  animation:stamp-pulse 2.6s ease-out infinite;
}
@keyframes stamp-pulse{
  0%,100%{ box-shadow:0 0 0 0 rgba(201,255,63,.5); }
  50%{ box-shadow:0 0 0 6px rgba(201,255,63,0); }
}

.site-nav{ margin-left:auto; }

.nav-list{
  display:flex;
  align-items:center;
  gap:clamp(.35rem,1.1vw,1.15rem);
}
.nav-item{ display:flex; }

.nav-link{
  position:relative;
  display:block;
  padding:.45rem .1rem;
  font-size:.9rem;
  font-weight:500;
  color:var(--sage);
  transition:color .2s var(--ease);
}
.nav-link::after{
  content:"";
  position:absolute;
  left:0;right:100%;bottom:.05rem;
  height:2px;
  background:var(--lime);
  transition:right .24s var(--ease), background-color .24s var(--ease);
}
.nav-link:hover,
.nav-link:focus-visible{ color:var(--mist); }
.nav-link:hover::after,
.nav-link:focus-visible::after{ right:0; }

.nav-link[aria-current="page"]{
  color:var(--lime);
  font-weight:700;
}
.nav-link[aria-current="page"]::after{
  right:0;
  background:var(--orange);
}

.header-cta{
  display:inline-flex;
  align-items:center;
  padding:.6rem 1.05rem;
  background:var(--lime);
  color:#0A1409;
  font-size:.85rem;
  font-weight:800;
  letter-spacing:-.01em;
  line-height:1.2;
  clip-path:polygon(0 0,100% 0,100% 100%,11px 100%,0 calc(100% - 11px));
  transition:background-color .2s var(--ease), color .2s var(--ease);
}
.header-cta:hover{ background:var(--orange); color:#120800; }

.nav-toggle{
  display:none;
  align-items:center;
  gap:.5rem;
  padding:.5rem .7rem;
  font-size:.8rem;
  font-weight:700;
  color:var(--mist);
  border:1px solid var(--line);
  border-radius:var(--radius);
}
.nav-toggle:hover{ border-color:var(--lime); color:var(--lime); }
.nav-toggle-bars{
  position:relative;
  display:block;
  width:1.05rem;
  height:2px;
  background:currentColor;
  transition:background-color .2s var(--ease);
}
.nav-toggle-bars::before,
.nav-toggle-bars::after{
  content:"";
  position:absolute;
  left:0;
  width:100%;
  height:2px;
  background:currentColor;
  transition:transform .2s var(--ease), top .2s var(--ease);
}
.nav-toggle-bars::before{ top:-5px; }
.nav-toggle-bars::after{ top:5px; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars{ background:transparent; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::before{ top:0; transform:rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::after{ top:0; transform:rotate(-45deg); }

.header-progress{
  position:absolute;
  left:0;bottom:0;
  width:100%;
  height:2px;
  transform:scaleX(0);
  transform-origin:0 50%;
  background:linear-gradient(90deg,var(--lime),var(--orange) 62%,var(--blue));
  transition:transform .1s linear;
  pointer-events:none;
}

@media (max-width:1080px){
  .header-stamp{ display:none; }
}

@media (max-width:900px){
  .nav-toggle{ display:inline-flex; margin-left:auto; }
  .header-cta{ display:none; }
  .site-nav{
    position:fixed;
    top:var(--header-h);
    left:0;right:0;
    margin-left:0;
    background:var(--ink-soft);
    border-top:1px solid rgba(46,74,62,.6);
    border-bottom:1px solid var(--line);
    padding:.35rem var(--gutter) 1.15rem;
    max-height:calc(100vh - var(--header-h));
    overflow-y:auto;
    opacity:0;
    visibility:hidden;
    transform:translateY(-10px);
    transition:opacity .22s var(--ease), transform .22s var(--ease), visibility .22s;
  }
  .site-nav[data-open]{
    opacity:1;
    visibility:visible;
    transform:none;
  }
  .nav-list{
    flex-direction:column;
    align-items:stretch;
    gap:0;
  }
  .nav-item{ display:block; }
  .nav-link{
    padding:.88rem .15rem;
    font-size:1rem;
    border-bottom:1px solid rgba(46,74,62,.55);
  }
  .nav-link::after{ display:none; }
  .nav-link[aria-current="page"]{
    padding-left:.7rem;
    border-left:2px solid var(--lime);
  }
}

/* ---------- footer ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(3rem,8vw,6rem);
  background:var(--ink-soft);
  border-top:1px solid var(--line);
  color:var(--sage);
}
.footer-scale{
  height:.55rem;
  border-bottom:1px solid rgba(46,74,62,.5);
  background-image:repeating-linear-gradient(90deg,var(--line) 0 1px,transparent 1px 28px);
}

.footer-top{
  display:grid;
  grid-template-columns:minmax(0,1.05fr) minmax(0,1.95fr);
  gap:clamp(2rem,5vw,4.5rem);
  padding-block:clamp(2.4rem,5vw,3.8rem);
}

.brand--footer{ margin-bottom:1.1rem; }
.footer-intro{
  max-width:34ch;
  font-size:.9rem;
  line-height:1.75;
  color:var(--sage);
}
.footer-pulse{
  display:inline-flex;
  align-items:center;
  gap:.5rem;
  margin-top:1.1rem;
  padding:.4rem .7rem;
  font-family:var(--font-mono);
  font-size:.71rem;
  letter-spacing:.04em;
  color:var(--lime);
  border:1px solid var(--line);
  background:rgba(201,255,63,.06);
  border-radius:1px;
}

.footer-cols{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:clamp(1.4rem,3vw,2.5rem);
}
.footer-col-title{
  padding-bottom:.6rem;
  margin-bottom:.95rem;
  font-family:var(--font-mono);
  font-size:.72rem;
  font-weight:700;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--mist);
  border-bottom:1px solid var(--line);
}

.footer-links{
  display:grid;
  gap:.55rem;
}
.footer-link{
  font-size:.9rem;
  color:var(--sage);
  transition:color .18s var(--ease), padding-left .18s var(--ease);
}
.footer-link:hover{
  color:var(--lime);
  padding-left:.3rem;
}

.footer-contact{
  display:grid;
  gap:.7rem;
}
.footer-contact-item{
  display:flex;
  align-items:baseline;
  gap:.55rem;
  font-size:.86rem;
  line-height:1.6;
}
.footer-contact-key{
  flex:none;
  min-width:2.9rem;
  font-family:var(--font-mono);
  font-size:.68rem;
  letter-spacing:.1em;
  color:var(--lime);
}
.footer-contact-value{
  color:var(--mist);
  overflow-wrap:anywhere;
}

.footer-note{
  margin-top:.95rem;
  padding-left:.75rem;
  border-left:2px solid var(--blue);
  font-size:.76rem;
  line-height:1.7;
  color:var(--sage);
}

.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:.6rem 1.5rem;
  padding-block:1.15rem;
  border-top:1px solid var(--line);
  font-size:.76rem;
  line-height:1.6;
}
.footer-legal{
  font-family:var(--font-mono);
  letter-spacing:.02em;
  color:var(--sage);
}
.footer-meta{
  font-family:var(--font-mono);
  letter-spacing:.04em;
  color:var(--sage);
}

@media (max-width:1000px){
  .footer-top{ grid-template-columns:minmax(0,1fr); }
}
@media (max-width:720px){
  .footer-cols{ grid-template-columns:minmax(0,1fr); }
  .footer-bottom{ flex-direction:column; align-items:flex-start; }
}

/* ---------- reveal motion ---------- */
.js [data-reveal]{
  opacity:0;
  transform:translateY(16px);
  transition:opacity .34s var(--ease), transform .34s var(--ease);
}
.js [data-reveal].is-revealed{
  opacity:1;
  transform:none;
}

@media (prefers-reduced-motion:reduce){
  html{ scroll-behavior:auto; }
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .js [data-reveal]{
    opacity:1 !important;
    transform:none !important;
    transition:none !important;
  }
  .stamp-dot{ animation:none; }
  .header-progress{ transition:none; }
  .btn:hover{ transform:none; }
  .footer-link:hover{ padding-left:0; }
}