/* ===== 1. Reset ===== */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,h5,p,figure,blockquote,dl,dd{margin:0}
ul,ol{padding:0;margin:0;list-style:none}
img,svg,video{display:block;max-width:100%}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
a{color:inherit;text-decoration:none}
main{display:block}

/* ===== 2. Tokens ===== */
:root{
  --night:#071A2B;
  --deep-green:#0B2E2A;
  --indigo:#1B1440;
  --wine:#4A1526;
  --cyan:#37F2D6;
  --orange:#FF7A3D;
  --ivory:#F4F0E6;
  --mist:#A7B4B8;
  --lime:#B8FF5A;
  --alert:#FF5C8A;
  --rail-w:15.5rem;
  --topbar-h:4.5rem;
  --radius-xl:32px;
  --radius-lg:24px;
  --radius-md:16px;
  --pill:999px;
  --hairline:rgba(167,180,184,.18);
  --hairline-strong:rgba(167,180,184,.32);
  --font-sans:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --font-mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;
  --ease:cubic-bezier(.22,.7,.28,1);
}

/* ===== 3. Base typography ===== */
body{
  min-height:100vh;
  padding-top:var(--topbar-h);
  background:
    radial-gradient(1200px 620px at 88% -12%, rgba(55,242,214,.10), transparent 62%),
    radial-gradient(900px 540px at 6% 108%, rgba(255,122,61,.09), transparent 66%),
    var(--night);
  background-attachment:fixed;
  color:var(--ivory);
  font-family:var(--font-sans);
  font-size:1.0625rem;
  line-height:1.75;
  letter-spacing:.008em;
  -webkit-font-smoothing:antialiased;
}
::selection{background:rgba(55,242,214,.28);color:var(--ivory)}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:6px}
.visually-hidden{position:absolute;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip:rect(0 0 0 0);clip-path:inset(50%);white-space:nowrap;border:0}

/* ===== 4. Skip link ===== */
.skip-link{
  position:fixed;top:.5rem;left:.5rem;z-index:200;
  display:inline-block;padding:.7rem 1.15rem;
  border-radius:var(--pill);
  background:var(--cyan);color:#04131d;
  font-family:var(--font-mono);font-size:.78rem;font-weight:700;letter-spacing:.1em;
  transform:translateY(-160%);
  transition:transform .18s var(--ease);
}
.skip-link:focus-visible{transform:translateY(0)}

/* ===== 5. Header / top bar ===== */
.site-header{position:fixed;inset:0 0 auto 0;z-index:80}
.header-bar{
  position:relative;z-index:2;
  display:flex;align-items:center;gap:.9rem;
  height:var(--topbar-h);
  padding-inline:clamp(.9rem,2.4vw,1.9rem);
  background:linear-gradient(100deg,rgba(7,26,43,.96),rgba(11,46,42,.92) 58%,rgba(27,20,64,.94));
  border-bottom:1px solid var(--hairline);
  box-shadow:0 18px 40px rgba(3,10,18,.55);
}
.brand{display:flex;align-items:center;gap:.75rem;min-width:0;padding-block:.2rem}
.brand-mark{
  position:relative;flex:none;
  width:2.1rem;height:2.1rem;border-radius:.72rem;
  background:linear-gradient(140deg,var(--cyan) 8%,rgba(55,242,214,.22) 48%,var(--orange) 100%);
  box-shadow:inset 0 0 0 1px rgba(7,26,43,.55),0 0 20px rgba(55,242,214,.3);
}
.brand-mark::after{content:"";position:absolute;inset:38%;border-radius:2px;background:var(--night)}
.brand-text{display:grid;gap:.05rem;min-width:0}
.brand-name{
  display:flex;align-items:baseline;gap:.35rem;
  font-size:1.02rem;font-weight:900;letter-spacing:.16em;
  color:var(--ivory);white-space:nowrap;
}
.brand-suffix{font-family:var(--font-mono);font-size:.68rem;font-weight:600;letter-spacing:.2em;color:var(--cyan)}
.brand-line{
  font-family:var(--font-mono);font-size:.66rem;letter-spacing:.16em;
  color:var(--mist);white-space:nowrap;
}
.header-status{
  display:flex;align-items:center;gap:.5rem;
  margin-inline-start:1.1rem;
  font-family:var(--font-mono);font-size:.68rem;letter-spacing:.14em;
  color:var(--mist);white-space:nowrap;
}
.header-status-dot{
  width:.45rem;height:.45rem;border-radius:50%;
  background:var(--lime);
  box-shadow:0 0 0 3px rgba(184,255,90,.14),0 0 12px rgba(184,255,90,.55);
}
.header-actions{display:flex;align-items:center;gap:.5rem;margin-inline-start:auto}
.header-action{
  display:inline-flex;align-items:center;
  padding:.46rem .9rem;border-radius:var(--pill);
  border:1px solid var(--hairline-strong);
  font-size:.82rem;font-weight:600;letter-spacing:.04em;color:var(--ivory);
  transition:color .18s var(--ease),border-color .18s var(--ease),background-color .18s var(--ease),box-shadow .18s var(--ease);
}
.header-action:hover,.header-action:focus-visible{
  color:var(--cyan);border-color:rgba(55,242,214,.55);
  background:rgba(55,242,214,.08);
}
.header-action--primary{
  border-color:transparent;background:var(--orange);color:#07131f;font-weight:800;
}
.header-action--primary:hover,.header-action--primary:focus-visible{
  color:#07131f;background:var(--orange);
  box-shadow:0 0 0 1px rgba(255,122,61,.55),0 10px 26px rgba(255,122,61,.3);
}

/* nav toggle */
.nav-toggle{
  display:inline-flex;flex-direction:column;justify-content:center;gap:4px;
  width:2.75rem;height:2.75rem;flex:none;
  margin-inline-start:.35rem;
  border-radius:var(--pill);border:1px solid var(--hairline-strong);
  background:rgba(7,26,43,.6);
  transition:border-color .18s var(--ease),background-color .18s var(--ease);
}
.nav-toggle-bar{
  display:block;width:1.15rem;height:2px;margin-inline:auto;border-radius:2px;
  background:var(--ivory);
  transition:transform .2s var(--ease),opacity .2s var(--ease),background-color .2s var(--ease);
}
.nav-toggle[aria-expanded="true"]{border-color:rgba(55,242,214,.6);background:rgba(55,242,214,.12)}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar{background:var(--cyan)}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

/* ===== 6. Rail navigation (desktop) ===== */
.rail{
  position:fixed;top:var(--topbar-h);bottom:0;left:0;z-index:70;
  width:var(--rail-w);
  display:flex;flex-direction:column;gap:.85rem;
  padding:1.6rem 1.05rem 1.35rem;
  background:linear-gradient(180deg,rgba(11,46,42,.95) 0%,rgba(7,26,43,.97) 54%,rgba(27,20,64,.95) 100%);
  border-inline-end:1px solid var(--hairline);
  overflow-y:auto;overscroll-behavior:contain;
}
.rail-head{
  font-family:var(--font-mono);font-size:.66rem;letter-spacing:.22em;
  color:var(--mist);padding-inline-start:.55rem;
}
.rail-list{display:grid;gap:.2rem}
.rail-item{min-width:0}
.rail-link{
  position:relative;
  display:grid;grid-template-columns:1.7rem minmax(0,1fr);align-items:center;gap:.5rem;
  padding:.6rem .65rem;border-radius:14px;
  border:1px solid transparent;
  color:var(--mist);
  transition:color .18s var(--ease),background-color .18s var(--ease),border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.rail-index{
  font-family:var(--font-mono);font-size:.72rem;font-weight:700;letter-spacing:.1em;
  color:rgba(167,180,184,.8);
  transition:color .18s var(--ease);
}
.rail-label{font-size:.97rem;font-weight:600;letter-spacing:.01em;line-height:1.35}
.rail-link:hover,.rail-link:focus-visible{
  color:var(--ivory);
  background:rgba(55,242,214,.07);
  border-color:rgba(55,242,214,.28);
}
.rail-link:hover .rail-index,.rail-link:focus-visible .rail-index{color:var(--cyan)}
.rail-link[aria-current="page"],.rail-link[data-active="true"]{
  color:var(--ivory);
  background:linear-gradient(90deg,rgba(55,242,214,.18),rgba(55,242,214,.02));
  border-color:rgba(55,242,214,.35);
  box-shadow:inset 2px 0 0 0 var(--cyan);
}
.rail-link[aria-current="page"] .rail-index,.rail-link[data-active="true"] .rail-index{color:var(--cyan)}
.rail-link[aria-current="page"] .rail-label,.rail-link[data-active="true"] .rail-label{font-weight:800}
.rail-actions{display:none;gap:.45rem;margin-top:.4rem}
.rail-action{
  padding:.55rem .85rem;border-radius:var(--pill);
  border:1px solid var(--hairline-strong);
  font-size:.85rem;font-weight:600;color:var(--ivory);text-align:center;
  transition:border-color .18s var(--ease),color .18s var(--ease)
}
.rail-action:hover,.rail-action:focus-visible{border-color:var(--cyan);color:var(--cyan)}
.rail-note{
  margin-top:auto;padding-top:.95rem;
  border-top:1px dashed rgba(167,180,184,.28);
  font-family:var(--font-mono);font-size:.68rem;line-height:1.7;letter-spacing:.06em;
  color:rgba(167,180,184,.85);
}
.nav-scrim{position:fixed;inset:0;z-index:65;background:rgba(3,10,18,.66);opacity:0;visibility:hidden;pointer-events:none;transition:opacity .2s var(--ease),visibility .2s var(--ease)}
.nav-scrim[data-open]{opacity:1;visibility:visible;pointer-events:auto}

/* ===== 7. Scroll meter ===== */
.scroll-meter{
  position:absolute;left:0;right:0;bottom:-1px;z-index:3;
  height:2px;background:rgba(167,180,184,.14);
}
.scroll-meter-fill{
  display:block;height:100%;width:100%;
  transform:scaleX(var(--progress,0));transform-origin:left center;
  background:linear-gradient(90deg,var(--cyan),var(--lime) 45%,var(--orange));
  transition:transform .12s linear;
}

/* ===== 8. Layout primitives ===== */
main{min-width:0}
.wrap{width:100%;max-width:84rem;margin-inline:auto;padding-inline:clamp(1.1rem,3vw,3rem)}
.section{padding-block:clamp(2.6rem,5.5vw,5.5rem);position:relative}
.section-head{display:grid;gap:.85rem;max-width:46rem;margin-bottom:clamp(1.4rem,3vw,2.4rem)}
.rule{height:1px;border:0;background:linear-gradient(90deg,rgba(167,180,184,.42),rgba(167,180,184,0))}

/* type */
.eyebrow{
  font-family:var(--font-mono);font-size:.7rem;font-weight:700;
  letter-spacing:.24em;text-transform:uppercase;color:var(--cyan);
}
.display-title{
  font-size:clamp(2.3rem,6vw,4.5rem);font-weight:900;line-height:1.05;
  letter-spacing:-.015em;
}
.section-title{
  font-size:clamp(1.6rem,3.6vw,2.85rem);font-weight:850;line-height:1.14;
  letter-spacing:-.01em;
}
.lede{font-size:1.05rem;line-height:1.8;color:rgba(244,240,230,.8);max-width:38ch}
.numeric{
  font-family:var(--font-mono);font-weight:800;
  font-variant-numeric:tabular-nums;letter-spacing:-.02em;
}

/* buttons */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.5rem;
  padding:.8rem 1.45rem;border-radius:var(--pill);
  border:1px solid transparent;
  font-size:.95rem;font-weight:700;letter-spacing:.02em;
  transition:color .18s var(--ease),background-color .18s var(--ease),border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.btn--primary{background:var(--orange);color:#07131f}
.btn--primary:hover,.btn--primary:focus-visible{
  background:var(--orange);color:#07131f;
  box-shadow:0 0 0 1px rgba(255,122,61,.6),0 12px 30px rgba(255,122,61,.32);
}
.btn--ghost{border-color:var(--hairline-strong);color:var(--ivory)}
.btn--ghost:hover,.btn--ghost:focus-visible{border-color:var(--cyan);color:var(--cyan);background:rgba(55,242,214,.08)}
.btn--quiet{background:rgba(244,240,230,.06);color:var(--ivory)}
.btn--quiet:hover,.btn--quiet:focus-visible{background:rgba(244,240,230,.12);color:var(--cyan)}

/* chips */
.chip{
  display:inline-flex;align-items:center;gap:.4rem;
  padding:.28rem .72rem;border-radius:var(--pill);
  border:1px solid var(--hairline-strong);
  font-family:var(--font-mono);font-size:.68rem;font-weight:600;
  letter-spacing:.12em;color:var(--mist);white-space:nowrap;
}
.chip--cyan{border-color:rgba(55,242,214,.5);color:var(--cyan)}
.chip--orange{border-color:rgba(255,122,61,.5);color:var(--orange)}
.chip--lime{border-color:rgba(184,255,90,.5);color:var(--lime)}

/* zones */
.zone{border-radius:var(--radius-xl);border:1px solid var(--hairline);padding:clamp(1.3rem,3vw,2.6rem)}
.zone--green{background:linear-gradient(155deg,rgba(11,46,42,.95),rgba(7,26,43,.55))}
.zone--indigo{background:linear-gradient(155deg,rgba(27,20,64,.95),rgba(7,26,43,.55))}
.zone--wine{background:linear-gradient(155deg,rgba(74,21,38,.92),rgba(7,26,43,.55))}

/* grids */
.grid{display:grid;gap:clamp(1rem,2.2vw,1.75rem)}
.grid--halves{grid-template-columns:repeat(auto-fit,minmax(min(100%,22rem),1fr))}
.grid--thirds{grid-template-columns:repeat(auto-fit,minmax(min(100%,15.5rem),1fr))}
.grid--board{grid-template-columns:minmax(0,1.4fr) minmax(0,1fr)}
@media (max-width:900px){.grid--board{grid-template-columns:1fr}}

/* research board */
.board{
  display:grid;gap:1rem;
  padding:clamp(1.15rem,2.6vw,1.9rem);
  border-radius:var(--radius-lg);
  border:1px solid var(--hairline);
  background:rgba(244,240,230,.035);
}
.board-head{display:flex;flex-wrap:wrap;align-items:baseline;gap:.6rem;justify-content:space-between}
.board-title{font-size:1.15rem;font-weight:800;letter-spacing:.01em}
.board-meta{font-family:var(--font-mono);font-size:.68rem;letter-spacing:.14em;color:var(--mist)}
.board-body{color:rgba(244,240,230,.86)}
.board-note{
  font-family:var(--font-mono);font-size:.72rem;line-height:1.7;letter-spacing:.04em;
  color:var(--mist);
  padding-inline-start:.75rem;border-inline-start:2px solid rgba(55,242,214,.55);
}

/* media placeholders */
.media{
  position:relative;overflow:hidden;
  aspect-ratio:16/9;
  border-radius:var(--radius-xl);
  border:1px solid var(--hairline);
  background:
    radial-gradient(120% 90% at 78% 0%,rgba(55,242,214,.22),transparent 58%),
    radial-gradient(120% 90% at 8% 100%,rgba(255,122,61,.2),transparent 60%),
    linear-gradient(150deg,var(--deep-green),var(--indigo));
  box-shadow:inset 0 0 0 1px rgba(7,26,43,.4);
}
.media img{width:100%;height:100%;object-fit:cover}
.media--wide{aspect-ratio:21/9}
.media--square{aspect-ratio:1/1}
.media--portrait{aspect-ratio:4/5}
.media-caption{font-family:var(--font-mono);font-size:.7rem;letter-spacing:.1em;color:var(--mist);margin-top:.6rem}

/* breadcrumbs */
.breadcrumbs{margin-block:clamp(1.1rem,2.4vw,1.8rem) 0}
.breadcrumb-list{display:flex;flex-wrap:wrap;gap:.4rem;font-family:var(--font-mono);font-size:.72rem;letter-spacing:.1em;color:var(--mist)}
.breadcrumb-item{display:flex;align-items:center;gap:.4rem}
.breadcrumb-item + .breadcrumb-item::before{content:"/";color:rgba(167,180,184,.45)}
.breadcrumb-link{color:var(--mist);border-bottom:1px solid transparent;transition:color .16s var(--ease),border-color .16s var(--ease)}
.breadcrumb-link:hover,.breadcrumb-link:focus-visible{color:var(--cyan);border-color:var(--cyan)}
.breadcrumb-current{color:var(--ivory)}

/* ===== 9. Footer ===== */
.site-footer{
  position:relative;
  border-top:1px solid var(--hairline);
  background:linear-gradient(180deg,rgba(7,26,43,.72) 0%,rgba(11,46,42,.9) 42%,rgba(27,20,64,.96) 100%);
}
.footer-inner{
  width:100%;max-width:84rem;margin-inline:auto;
  padding:clamp(2rem,4vw,3.4rem) clamp(1.1rem,3vw,3rem) 1.4rem;
}
.footer-banner{
  display:grid;grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:1.5rem;
  padding:clamp(1.3rem,3vw,2.2rem);
  border-radius:var(--radius-xl);
  border:1px solid rgba(244,240,230,.16);
  background:
    radial-gradient(120% 140% at 100% 0%,rgba(55,242,214,.16),transparent 60%),
    linear-gradient(115deg,rgba(74,21,38,.85),rgba(27,20,64,.7));
}
.footer-banner-copy{display:grid;gap:.55rem;max-width:44rem}
.footer-eyebrow{font-family:var(--font-mono);font-size:.7rem;letter-spacing:.22em;color:var(--cyan);text-transform:uppercase}
.footer-banner-title{font-size:clamp(1.35rem,2.8vw,2.1rem);font-weight:900;line-height:1.16;letter-spacing:-.01em}
.footer-banner-text{font-size:.98rem;line-height:1.75;color:rgba(244,240,230,.8);max-width:38ch}
.footer-cta{justify-self:start;white-space:nowrap}
.footer-grid{
  display:grid;grid-template-columns:minmax(0,1.5fr) minmax(0,1fr) minmax(0,1fr) minmax(0,1.25fr);
  gap:clamp(1.4rem,3vw,2.6rem);
  margin-block:clamp(2rem,4vw,3rem) clamp(1.4rem,3vw,2.2rem);
}
.footer-col{display:grid;gap:.75rem;align-content:start;min-width:0}
.footer-col--brand{gap:.7rem}
.footer-brand-name{
  font-size:1.05rem;font-weight:900;letter-spacing:.16em;color:var(--ivory);
}
.footer-brand-line{font-size:.92rem;line-height:1.75;color:rgba(244,240,230,.78);max-width:30ch}
.footer-note{
  font-family:var(--font-mono);font-size:.72rem;line-height:1.75;letter-spacing:.04em;
  color:var(--mist);
  padding-inline-start:.7rem;border-inline-start:2px solid rgba(55,242,214,.45);
  max-width:32ch;
}
.footer-col-title{
  font-family:var(--font-mono);font-size:.7rem;font-weight:700;
  letter-spacing:.2em;text-transform:uppercase;color:var(--mist);
  padding-bottom:.55rem;border-bottom:1px solid var(--hairline);
}
.footer-list{display:grid;gap:.5rem}
.footer-link{
  position:relative;display:inline-block;
  font-size:.94rem;color:var(--mist);
  transition:color .18s var(--ease);
}
.footer-link::after{
  content:"";position:absolute;left:0;right:0;bottom:-2px;height:1px;
  background:var(--cyan);transform:scaleX(0);transform-origin:left center;
  transition:transform .18s var(--ease);
}
.footer-link:hover,.footer-link:focus-visible{color:var(--ivory)}
.footer-link:hover::after,.footer-link:focus-visible::after{transform:scaleX(1)}
.footer-contact{display:grid;gap:.7rem}
.footer-contact-row{display:grid;gap:.15rem}
.footer-contact-label{font-family:var(--font-mono);font-size:.66rem;letter-spacing:.18em;color:rgba(167,180,184,.85);text-transform:uppercase}
.footer-contact-value{font-size:.92rem;line-height:1.65;color:var(--ivory);overflow-wrap:anywhere}
.footer-bottom{
  display:flex;flex-wrap:wrap;align-items:center;gap:.6rem 1.4rem;
  padding-top:1.2rem;border-top:1px solid var(--hairline);
  font-family:var(--font-mono);font-size:.72rem;letter-spacing:.08em;color:var(--mist);
}
.footer-copy{color:rgba(167,180,184,.9)}
.footer-legal{display:flex;flex-wrap:wrap;gap:.35rem 1rem}
.footer-legal-link{color:var(--mist);border-bottom:1px solid transparent;transition:color .16s var(--ease),border-color .16s var(--ease)}
.footer-legal-link:hover,.footer-legal-link:focus-visible{color:var(--cyan);border-color:var(--cyan)}
.footer-icp{margin-inline-start:auto;color:rgba(167,180,184,.85)}

/* ===== 10. Responsive shell ===== */
@media (min-width:1024px){
  main{padding-inline-start:var(--rail-w)}
  .site-footer{margin-inline-start:var(--rail-w)}
  .nav-toggle{display:none}
  .nav-scrim{display:none}
}
@media (max-width:1023.98px){
  .rail{
    top:0;bottom:0;left:0;z-index:70;
    width:min(20rem,86vw);
    padding-top:calc(var(--topbar-h) + 1.1rem);
    transform:translateX(-104%);
    visibility:hidden;
    box-shadow:32px 0 80px rgba(3,10,18,.6);
    transition:transform .22s var(--ease),visibility .22s var(--ease);
  }
  .rail[data-open]{transform:translateX(0);visibility:visible}
  .rail-actions{display:grid}
  body.nav-open{overflow:hidden}
  main{padding-inline-start:0}
  .site-footer{margin-inline-start:0}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:1000px){
  .header-status{display:none}
}
@media (max-width:899.98px){
  .header-action:not(.header-action--primary){display:none}
  .footer-banner{grid-template-columns:1fr}
  .footer-cta{justify-self:start}
}
@media (max-width:719.98px){
  :root{--topbar-h:3.85rem}
  .header-actions{display:none}
  .nav-toggle{margin-inline-start:auto}
  .brand-line{display:none}
  .footer-grid{grid-template-columns:1fr}
  .footer-icp{margin-inline-start:0}
  .footer-bottom{gap:.5rem}
}
@media (max-width:420px){
  .brand-name{font-size:.95rem;letter-spacing:.12em}
  .footer-note{max-width:none}
}

/* ===== 11. Motion preferences ===== */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.01ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.01ms !important;
    scroll-behavior:auto !important;
  }
  .scroll-meter-fill{transition:none}
}