:root{
  --bg:#0b0d10;
  --surface:#14181e;
  --card:#161b21;
  --border:#242b35;
  --text:#e8eaf0;
  --muted:#99a2b1;
  --accent:#4ade80;
  --accent-2:#22d3ee;
  --radius:14px;
  --maxw:1060px;
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,"Apple Color Emoji",sans-serif;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  background:var(--bg);
  color:var(--text);
  font-family:var(--font);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
a{color:inherit;text-decoration:none}
code{font-family:var(--mono);font-size:.88em;background:rgba(255,255,255,.06);padding:.12em .4em;border-radius:5px;color:#d7f7e6}
em{font-style:normal;color:var(--text)}
h1,h2,h3{line-height:1.2;letter-spacing:-.02em}
section{scroll-margin-top:84px}

/* ---------- header ---------- */
header.site{
  position:sticky;top:0;z-index:50;
  display:flex;align-items:center;justify-content:space-between;
  gap:16px;
  padding:14px clamp(16px,5vw,40px);
  background:rgba(11,13,16,.72);
  backdrop-filter:saturate(140%) blur(12px);
  -webkit-backdrop-filter:saturate(140%) blur(12px);
  border-bottom:1px solid var(--border);
}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:18px;letter-spacing:-.01em}
.brand-mark{border-radius:7px}
header nav{display:flex;align-items:center;gap:8px}
header nav a{color:var(--muted);padding:8px 12px;border-radius:9px;font-size:15px;font-weight:500;transition:color .15s,background .15s}
header nav a:hover{color:var(--text)}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  font-weight:600;font-size:15px;border-radius:11px;
  padding:11px 20px;cursor:pointer;border:1px solid transparent;
  transition:transform .12s ease,box-shadow .2s ease,background .2s,border-color .2s,color .15s;
}
.btn:active{transform:translateY(1px)}
.btn-primary{
  color:#05180f;
  background:linear-gradient(135deg,var(--accent),var(--accent-2));
  box-shadow:0 6px 24px -8px rgba(74,222,128,.6);
}
.btn-primary:hover{box-shadow:0 10px 30px -8px rgba(74,222,128,.75)}
.btn-ghost{color:var(--text);border-color:var(--border);background:rgba(255,255,255,.02)}
.btn-ghost:hover{border-color:#3a4552;background:rgba(255,255,255,.05)}
.btn-lg{font-size:17px;padding:15px 30px;border-radius:13px}

/* ---------- hero ---------- */
.hero{
  max-width:760px;margin:0 auto;
  padding:clamp(48px,9vw,96px) clamp(16px,5vw,24px) clamp(36px,6vw,64px);
  text-align:center;
}
.hero-icon{border-radius:24px;box-shadow:0 20px 60px -20px rgba(0,0,0,.8);margin-bottom:26px}
.hero h1{
  font-size:clamp(42px,8vw,68px);font-weight:800;letter-spacing:-.03em;
  background:linear-gradient(180deg,#fff,#b9c2cf);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.tagline{font-size:clamp(19px,3.4vw,24px);font-weight:600;margin-top:14px;color:var(--text)}
.lede{color:var(--muted);font-size:clamp(16px,2.4vw,18px);margin:18px auto 0;max-width:600px}
.cta{display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:14px;margin-top:34px}
.cta-meta{color:var(--muted);font-size:14px}
.cta-sub{color:var(--muted);font-size:13px;margin-top:14px}

/* ---------- developer band ---------- */
.band{padding:clamp(28px,5vw,44px) clamp(16px,5vw,24px)}
.band-inner{
  max-width:var(--maxw);margin:0 auto;
  background:linear-gradient(135deg,rgba(74,222,128,.08),rgba(34,211,238,.06));
  border:1px solid var(--border);border-radius:var(--radius);
  padding:clamp(24px,4vw,40px);
}
.band-inner h2{font-size:clamp(22px,3.6vw,30px);font-weight:700}
.band-inner p{color:var(--muted);margin-top:12px;max-width:760px;font-size:16.5px}

/* ---------- features ---------- */
.features{max-width:var(--maxw);margin:0 auto;padding:clamp(40px,7vw,72px) clamp(16px,5vw,24px)}
.section-title{font-size:clamp(26px,4.4vw,38px);font-weight:800;text-align:center;letter-spacing:-.025em}
.grid{
  display:grid;gap:16px;margin-top:40px;
  grid-template-columns:repeat(auto-fit,minmax(272px,1fr));
}
.card{
  background:var(--card);border:1px solid var(--border);border-radius:var(--radius);
  padding:24px;transition:transform .15s ease,border-color .2s ease,background .2s;
}
.card:hover{transform:translateY(-3px);border-color:#33414f;background:#1a2028}
.card h3{font-size:18px;font-weight:700}
.card h3::before{content:"";display:block;width:26px;height:3px;border-radius:3px;margin-bottom:14px;background:linear-gradient(90deg,var(--accent),var(--accent-2))}
.card p{color:var(--muted);margin-top:8px;font-size:15px}

/* ---------- safety ---------- */
.safety{padding:clamp(20px,4vw,40px) clamp(16px,5vw,24px) clamp(40px,7vw,64px)}
.safety-inner{max-width:820px;margin:0 auto}
.checks{list-style:none;margin-top:36px;display:grid;gap:14px}
.checks li{
  position:relative;padding:18px 20px 18px 54px;
  background:var(--surface);border:1px solid var(--border);border-radius:12px;
  color:var(--muted);font-size:15.5px;
}
.checks li strong{color:var(--text)}
.checks li::before{
  content:"";position:absolute;left:18px;top:19px;width:22px;height:22px;border-radius:50%;
  background:
    linear-gradient(135deg,var(--accent),var(--accent-2));
  -webkit-mask:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath fill='black' d='M9.55 17.3 4.3 12.05l1.4-1.4 3.85 3.85 8.35-8.35 1.4 1.4z'/%3E%3C/svg%3E") center/80% no-repeat;
          mask:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath fill='black' d='M9.55 17.3 4.3 12.05l1.4-1.4 3.85 3.85 8.35-8.35 1.4 1.4z'/%3E%3C/svg%3E") center/80% no-repeat;
}

/* ---------- download ---------- */
.download{
  max-width:720px;margin:0 auto;text-align:center;
  padding:clamp(40px,7vw,72px) clamp(16px,5vw,24px) clamp(56px,9vw,88px);
}
.download .btn{margin-top:30px}
.specs{
  margin:40px auto 0;max-width:520px;
  border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;
  text-align:left;background:var(--surface);
}
.specs>div{display:flex;justify-content:space-between;gap:16px;padding:13px 20px;border-bottom:1px solid var(--border)}
.specs>div:last-child{border-bottom:none}
.specs dt{color:var(--muted);font-size:14.5px}
.specs dd{font-weight:600;font-size:14.5px;text-align:right}
.hash{margin-top:22px;color:var(--muted);font-size:12.5px;line-height:1.7}
.hash code{word-break:break-all;color:#cfd6e0;background:transparent;padding:0}
.install-note{color:var(--muted);font-size:14px;margin-top:20px}

/* ---------- footer ---------- */
.site-footer{border-top:1px solid var(--border);padding:40px clamp(16px,5vw,40px)}
.foot-inner{max-width:var(--maxw);margin:0 auto;display:flex;flex-wrap:wrap;align-items:center;gap:16px 28px}
.foot-brand{display:flex;align-items:center;gap:9px;font-weight:700}
.foot-brand img{border-radius:6px}
.foot-nav{display:flex;gap:20px;color:var(--muted);font-size:14px}
.foot-nav a:hover{color:var(--text)}
.foot-legal{color:var(--muted);font-size:13px;margin-left:auto;text-align:right;flex:1 1 260px}

@media (max-width:620px){
  header nav a:not(.btn){display:none}
  .foot-legal{margin-left:0;text-align:left}
  .specs>div{flex-direction:column;gap:2px}
  .specs dd{text-align:left}
}

@media (prefers-reduced-motion:reduce){
  *{transition:none!important;scroll-behavior:auto!important}
}