:root {
  --bg0:#0c1210; --bg1:#14201a; --ink:#e8f2ec; --muted:#9bb5a8;
  --accent:#3dcf8e; --accent2:#f0c35a; --line:rgba(232,242,236,.12);
  --font-display:"Syne",sans-serif; --font-body:"Figtree",sans-serif; --font-mono:"IBM Plex Mono",monospace;
}
*{box-sizing:border-box} html,body{margin:0;padding:0}
body{min-height:100vh;color:var(--ink);font-family:var(--font-body);background:radial-gradient(1200px 600px at 10% -10%,rgba(61,207,142,.22),transparent 55%),radial-gradient(900px 500px at 90% 0%,rgba(240,195,90,.14),transparent 50%),linear-gradient(160deg,var(--bg0),var(--bg1) 55%,#0a100e)}
a{color:var(--accent);text-decoration:none} a:hover{text-decoration:underline}
.wrap{width:min(980px,calc(100% - 2rem));margin:0 auto;padding:2.5rem 0 4rem}
.brand{font-family:var(--font-display);font-weight:800;font-size:clamp(2.4rem,6vw,3.8rem);letter-spacing:-.03em;margin:0 0 .6rem}
.brand span{color:var(--accent)}
.lead{color:var(--muted);font-size:1.1rem;max-width:40rem;line-height:1.5;margin:0 0 1.4rem}
.cta{display:flex;flex-wrap:wrap;gap:.7rem;margin-bottom:2.5rem}
.btn{display:inline-flex;align-items:center;border:1px solid var(--line);border-radius:999px;padding:.65rem 1.1rem;color:var(--ink);background:rgba(255,255,255,.03);font-weight:600}
.btn.primary{background:var(--accent);color:#062015;border-color:transparent}
.btn:hover{text-decoration:none;background:rgba(255,255,255,.06)}
section{margin:2.2rem 0;padding-top:.5rem;border-top:1px solid var(--line)}
h2{font-family:var(--font-display);font-size:1.45rem;margin:1.2rem 0 .5rem}
h3{margin:1rem 0 .35rem;font-size:1.05rem}
p,li{color:var(--muted);line-height:1.55}
code,.mono{font-family:var(--font-mono);font-size:.9em;background:rgba(0,0,0,.35);padding:.1rem .35rem;border-radius:.3rem;color:var(--accent2)}
.panel{background:rgba(8,14,12,.55);border:1px solid var(--line);border-radius:1rem;padding:1rem 1.1rem;margin:1rem 0}
.row{display:flex;flex-wrap:wrap;gap:.6rem;align-items:center}
input{flex:1 1 180px;min-width:0;background:#0a110e;border:1px solid var(--line);color:var(--ink);border-radius:.6rem;padding:.65rem .8rem;font:inherit}
button{cursor:pointer;font:inherit;font-weight:700;background:var(--accent);color:#062015;border:0;border-radius:.6rem;padding:.65rem 1rem}
.msg{margin-top:.8rem;white-space:pre-wrap;font-family:var(--font-mono);font-size:.85rem}
.msg.err{color:#ff8f8f}.msg.ok{color:var(--accent)}
.tabs{display:flex;flex-wrap:wrap;gap:.4rem;margin:.8rem 0 1rem}
.tab{border:1px solid var(--line);background:transparent;color:var(--muted);border-radius:999px;padding:.4rem .85rem;font-weight:600}
.tab.active{color:#062015;background:var(--accent2);border-color:transparent}
.os-pane{display:none}.os-pane.active{display:block}
.footer{margin-top:3rem;color:var(--muted);font-size:.9rem}