:root{
  --bg:#0A141C; --card:#11222D; --border:#1C3342;
  --text:#F2F7FA; --muted:#9DB0BC;
  --teal:#2DD4BF; --blue:#3B82F6;
  --safe:#4CD18A; --warn:#F59E0B; --danger:#E5534B;
  --radius:18px; --max:1100px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);
  font:16px/1.65 system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
  -webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{color:var(--teal)}
a:hover{text-decoration:none}
.wrap{max-width:var(--max);margin:0 auto;padding:0 20px}
.narrow{max-width:760px}
.muted{color:var(--muted)}


.site-header{position:sticky;top:0;z-index:10;background:rgba(10,20,28,.9);
  backdrop-filter:blur(10px);border-bottom:1px solid var(--border)}
.bar{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{display:flex;align-items:center;gap:10px;color:var(--text);text-decoration:none;
  font-weight:800;font-size:20px;letter-spacing:.2px}
.nav{display:flex;align-items:center;gap:6px}
.nav a{color:var(--muted);text-decoration:none;padding:8px 12px;border-radius:10px;font-weight:600}
.nav a:hover,.nav a.on{color:var(--text)}
.nav a.btn{color:#04120F}


.btn{display:inline-block;background:var(--teal);color:#04120F;font-weight:800;
  padding:14px 26px;border-radius:14px;text-decoration:none;border:2px solid var(--teal);
  transition:transform .15s,filter .15s}
.btn:hover{filter:brightness(1.08);transform:translateY(-1px)}
.btn-small{padding:8px 16px;border-radius:12px;font-size:15px}
.btn-ghost{background:transparent;color:var(--text);border-color:var(--border)}
.btn-ghost:hover{border-color:var(--teal);color:var(--teal)}
.btn-disabled{background:var(--card);border-color:var(--border);color:var(--muted);cursor:not-allowed}
.btn-disabled:hover{transform:none;filter:none}


.hero{padding:56px 0 40px;background:
  radial-gradient(900px 420px at 85% 0%,rgba(45,212,191,.14),transparent 60%),
  radial-gradient(700px 380px at 0% 100%,rgba(59,130,246,.10),transparent 60%)}
.hero-grid{display:grid;gap:36px;align-items:center}
.eyebrow{color:var(--teal);font-weight:700;letter-spacing:.08em;text-transform:uppercase;font-size:13px;margin:0 0 12px}
h1{font-size:clamp(32px,6vw,54px);line-height:1.1;margin:0 0 16px;letter-spacing:-.02em}
h2{font-size:clamp(24px,3.4vw,32px);line-height:1.2;margin:40px 0 14px}
h3{font-size:18px;margin:20px 0 6px}
.lead{font-size:clamp(17px,2.2vw,20px);color:var(--muted);margin:0 0 26px;max-width:34em}
.cta{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:22px}
.chips{display:flex;flex-wrap:wrap;gap:8px;list-style:none;padding:0;margin:0}
.chips li{background:var(--card);border:1px solid var(--border);color:var(--muted);
  padding:6px 14px;border-radius:999px;font-size:14px}
.hero-art{display:flex;justify-content:center}
.hero-art img{width:100%;max-width:520px;filter:drop-shadow(0 24px 60px rgba(45,212,191,.18))}
.hero-art img.is-logo{max-width:300px}
@media(min-width:900px){
  .hero{padding:84px 0 64px}
  .hero-grid{grid-template-columns:1.05fr .95fr}
}


.section{padding:28px 0 72px}
.section h1{margin-top:28px}
.card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);
  padding:22px 24px;margin:18px 0}
.card-title{margin:0 0 6px;font-size:20px}
.dl-card{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:16px}
.dl-card p{margin:0}
.hash{font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:14px;
  word-break:break-all;background:var(--bg);border:1px solid var(--border);
  border-radius:12px;padding:12px 14px;margin:8px 0 10px;user-select:all}
pre{background:var(--bg);border:1px solid var(--border);border-radius:12px;padding:12px 14px;overflow-x:auto;margin:8px 0}
code{font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:14px}
.list{margin:8px 0 0;padding-left:20px}
.steps{padding-left:22px}
.steps li{margin:10px 0}


details{background:var(--card);border:1px solid var(--border);border-radius:14px;margin:10px 0;padding:0 20px}
summary{cursor:pointer;font-weight:700;padding:16px 0;list-style:none;position:relative;padding-right:28px}
summary::-webkit-details-marker{display:none}
summary::after{content:"+";position:absolute;right:0;top:50%;transform:translateY(-50%);
  color:var(--teal);font-size:22px;font-weight:600}
details[open] summary::after{content:"–"}
details p{margin:0 0 16px;color:var(--muted)}
details[open]{border-color:rgba(45,212,191,.4)}


.legal h2{margin-top:34px;font-size:22px}
.legal p,.legal li{color:#C9D6DE}
.legal ul{padding-left:22px}


.site-footer{border-top:1px solid var(--border);padding:32px 0 24px;margin-top:20px}
.foot{display:flex;flex-wrap:wrap;gap:24px;justify-content:space-between}
.foot p{margin:4px 0 0}
.foot nav{display:flex;flex-direction:column;gap:6px}
.foot nav a{color:var(--muted);text-decoration:none}
.foot nav a:hover{color:var(--teal)}
.copy{padding-top:20px;font-size:14px}

@media(max-width:640px){
  .hide-sm{display:none}
  .bar{height:58px}
  .btn{padding:13px 22px}
  .card{padding:18px}
}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}


.alert-bar{display:flex;align-items:stretch;background:#4A1311;border-bottom:1px solid #7A1D18;color:#fff;font-size:14px;font-weight:600}
.alert-label{flex:none;background:var(--warn);color:#2B1700;font-weight:900;letter-spacing:.05em;
  padding:9px 14px;display:flex;align-items:center;position:relative;z-index:1}
.alert-track{flex:1;overflow:hidden;position:relative;display:flex;align-items:center}
.alert-move{display:flex;width:max-content;animation:alert-scroll 40s linear infinite}
.alert-move.slow1{animation-duration:28s}
.alert-move.slow2{animation-duration:50s}
.alert-move.slow3{animation-duration:80s}
.alert-bar:hover .alert-move,.alert-bar:focus-within .alert-move{animation-play-state:paused}
.alert-set{display:flex;flex:none;margin:0;padding:0;list-style:none}
.alert-set li{white-space:nowrap;padding:9px 0 9px 0}
.alert-set li::before{content:"•";color:var(--warn);margin:0 18px}
@keyframes alert-scroll{from{transform:translateX(0)}to{transform:translateX(-50%)}}
@media(prefers-reduced-motion:reduce){
  .alert-move{animation:none;width:auto}
  .alert-set[aria-hidden="true"]{display:none}
  .alert-set{flex-wrap:wrap}
  .alert-set li{white-space:normal}
}


.about{padding:56px 0 24px;scroll-margin-top:70px}
.about h2{margin-top:0}
.about .lead{margin-bottom:28px}
.about-grid{display:grid;gap:18px}
.about-grid .card{margin:0}
.about-grid h3{margin:0 0 10px;font-size:20px}
.about-grid p{margin:0 0 10px;color:var(--muted)}
.about-grid p:last-child{margin-bottom:0}
.about-list{margin:0;padding-left:20px;color:var(--muted)}
.about-list li{margin:6px 0}
.about-list strong{color:var(--text)}
@media(min-width:900px){
  .about-grid{grid-template-columns:1fr 1fr}
  .about-grid .span{grid-column:1 / -1}
}
#faq{scroll-margin-top:70px}


.stats{padding:44px 0 0;scroll-margin-top:70px}
.stats h2{margin:0 0 18px}
.stat-grid{display:grid;gap:16px}
.stat{background:var(--card);border:1px solid var(--border);border-left:4px solid var(--danger);
  border-radius:var(--radius);padding:22px 24px}
.stat p{margin:0}
.stat-value{font-size:clamp(34px,6vw,52px);font-weight:900;line-height:1.05;color:var(--danger);letter-spacing:-.02em}
.stat-label{margin-top:10px;color:var(--text);font-weight:600}
.stat-note{margin-top:8px;color:var(--muted);font-size:14px}
.stat-upd{margin:14px 0 0;font-size:14px}
@media(min-width:760px){.stat-grid{grid-template-columns:1fr 1fr}}


.post-card{display:block;background:var(--card);border:1px solid var(--border);border-radius:var(--radius);
  padding:0;overflow:hidden;margin:14px 0;text-decoration:none;color:var(--text);transition:border-color .15s,transform .15s}
.post-card:hover{border-color:var(--teal);transform:translateY(-1px)}
.post-date{display:block;color:var(--muted);font-size:14px}
.post-title{display:block;font-size:22px;font-weight:800;margin:4px 0;line-height:1.25}
.post-sum{display:block;color:var(--muted)}
.crumb{margin:24px 0 0;font-size:15px}
.draft-note{background:#3a2a05;border:1px solid var(--warn);color:#ffd999;border-radius:12px;padding:10px 14px;font-size:14px}
.post h1{margin-top:12px;margin-bottom:4px}
.post-body{margin-top:24px}
.post-body h2{font-size:26px;margin:36px 0 12px}
.post-body h3{font-size:20px;margin:28px 0 8px}
.post-body p,.post-body li{color:#D3DEE5}
.post-body ul{padding-left:22px}
.post-body code{background:var(--card);border:1px solid var(--border);border-radius:6px;padding:1px 6px;word-break:break-all}
.post-fig{margin:26px 0;text-align:center}
.post-fig a{display:inline-block;max-width:100%}
.post-fig img{margin:0 auto;border-radius:14px;border:1px solid var(--border);
  width:auto;height:auto;max-width:100%;max-height:640px;background:var(--card)}
.post-fig figcaption{margin-top:10px;color:var(--muted);font-size:14px}
.img-missing{background:#3a1512;border:1px dashed var(--danger);color:#ffb4ae;border-radius:10px;padding:10px 14px;font-size:14px}
.post-end{margin-top:40px}
.foot-title{color:var(--text);font-weight:700;margin-bottom:2px}


.latest{padding:44px 0 0;scroll-margin-top:70px}
.latest-head{display:flex;flex-wrap:wrap;align-items:baseline;justify-content:space-between;gap:8px 16px;margin-bottom:18px}
.latest-head h2{margin:0}
.latest-head a{font-weight:700;text-decoration:none}
.latest-head a:hover{text-decoration:underline}
.latest-grid{display:grid;gap:16px}
.latest-grid .post-card{margin:0}
@media(min-width:760px){.latest-grid{grid-template-columns:repeat(3,1fr)}}


@media(max-width:640px){
  .foot{flex-direction:column;gap:28px}
  .foot nav{gap:10px}
}



.post-text{display:block;padding:20px 24px}
.post-cover{display:block;width:100%;height:auto;aspect-ratio:16/9;object-fit:cover;
  background:var(--bg);border-bottom:1px solid var(--border)}
.post-hero{display:block;width:100%;height:auto;max-height:460px;object-fit:cover;
  border-radius:14px;border:1px solid var(--border);margin:18px 0 6px;background:var(--card)}


.nav-toggle{position:absolute;top:7px;right:20px;width:44px;height:44px;margin:0;opacity:0;
  z-index:3;cursor:pointer}
.burger{display:none;flex:none;width:44px;height:44px;flex-direction:column;align-items:center;
  justify-content:center;gap:5px;border-radius:12px;border:1px solid var(--border);background:var(--card)}
.burger span{display:block;width:20px;height:2px;border-radius:2px;background:var(--text);
  transition:transform .2s,opacity .2s}
.nav-toggle:focus-visible + .burger{outline:2px solid var(--teal);outline-offset:2px}
.nav-toggle:checked + .burger span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle:checked + .burger span:nth-child(2){opacity:0}
.nav-toggle:checked + .burger span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
@media(max-width:700px){
  .bar{height:58px}
  .burger{display:flex}
  .nav{display:none;position:absolute;top:100%;left:0;right:0;flex-direction:column;align-items:stretch;
    gap:2px;padding:10px 20px 18px;background:#0A141C;border-bottom:1px solid var(--border);
    box-shadow:0 18px 30px rgba(0,0,0,.45)}
  .nav-toggle:checked ~ .nav{display:flex}
  .nav a{padding:14px 12px;font-size:17px}
  .nav a.btn{margin-top:10px;text-align:center;padding:13px 16px;font-size:16px}
}


.about-why,.about-origin{margin:0 0 18px}
.about-sub{font-size:24px;margin:34px 0 4px}
.features{counter-reset:feat;margin:6px 0 40px}
.feature{display:grid;gap:28px;align-items:center;padding:40px 0;border-top:1px solid var(--border)}
.feature:first-child{border-top:0}
.feature h4{margin:0 0 12px;font-size:clamp(26px,3.6vw,36px);line-height:1.15;letter-spacing:-.01em}
.feature h4::before{counter-increment:feat;content:counter(feat,decimal-leading-zero);display:block;
  color:var(--teal);font-size:15px;font-weight:800;letter-spacing:.14em;margin-bottom:10px}
.feature p{margin:0;color:var(--muted);font-size:18px;line-height:1.7;max-width:30em}
.feature-art{position:relative;display:flex;justify-content:center}
.feature-art::before{content:"";position:absolute;inset:6% 8%;z-index:0;
  background:radial-gradient(closest-side,rgba(45,212,191,.20),transparent 72%)}
.feature-img{position:relative;z-index:1;width:100%;max-width:270px;height:auto;
  filter:drop-shadow(0 24px 50px rgba(0,0,0,.45))}
@media(min-width:800px){
  .feature{grid-template-columns:1fr 1fr;gap:72px;padding:64px 0}
  .feature:not(.no-img):nth-child(even) .feature-art{order:-1}
  .feature-img{max-width:310px}
  .feature-text{padding:0 8px}
}


.isteps{list-style:none;padding:0;margin:14px 0 8px;display:grid;gap:16px}
.istep{display:grid;gap:18px;align-items:center;background:var(--card);border:1px solid var(--border);
  border-radius:var(--radius);padding:20px 22px}
.istep h3{margin:0 0 8px;font-size:19px;display:flex;align-items:center;gap:12px;line-height:1.3}
.istep-n{flex:none;width:32px;height:32px;border-radius:50%;background:var(--teal);color:#04120F;
  display:inline-flex;align-items:center;justify-content:center;font-weight:800;font-size:16px}
.istep p{margin:0;color:var(--muted)}
.istep-art{display:flex;justify-content:center}
.istep-img{width:100%;max-width:230px;height:auto;filter:drop-shadow(0 14px 30px rgba(45,212,191,.14))}
@media(min-width:700px){.istep:not(.no-img){grid-template-columns:1fr 240px;gap:28px}}


.faq-grid{display:grid;gap:32px;align-items:start}
.faq-art{position:relative;display:flex;justify-content:center}
.faq-art::before{content:"";position:absolute;inset:4% 6%;z-index:0;
  background:radial-gradient(closest-side,rgba(45,212,191,.20),transparent 72%)}
.faq-img{position:relative;z-index:1;width:100%;max-width:340px;height:auto;
  filter:drop-shadow(0 24px 50px rgba(0,0,0,.45))}
@media(min-width:900px){
  .faq-grid{grid-template-columns:1.05fr .95fr;gap:40px}
  .faq-art{position:sticky;top:90px;justify-content:flex-end;padding-right:12px}
  .faq-art::before{inset:0}
  .faq-img{max-width:430px}
}