:root{
  --w: 920px; --pad: 16px; font-size: 16px;
  --bg: #0b1617;
  --text: #f1f7f7;
  --muted: #bfe4e1;
  --card: #0f2021;
  --stroke: #183233;
  --primary: #00d4ff;
  --primary-2: #00bfa6;
  --accent: #ffd166;
}
*{box-sizing:border-box}
body{font-family:system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,Cantarell,Helvetica,Arial,sans-serif;margin:0;color:var(--text);background:var(--bg)}
.header{position:sticky;top:0;z-index:20;border-bottom:1px solid var(--stroke);background:linear-gradient(180deg,rgba(0,0,0,.35),rgba(0,0,0,0)) #0c0c10;backdrop-filter:saturate(160%) blur(6px)}
.wrap{max-width:var(--w);margin:0 auto;padding:var(--pad)}
nav a{margin-right:14px;text-decoration:none;color:var(--text);opacity:.9}
nav a:hover{text-decoration:underline;opacity:1}
h1,h2{line-height:1.2;margin:18px 0 8px}
p{line-height:1.65;color:var(--muted)}
.hero{padding:48px 0;border-bottom:1px solid var(--stroke);
  background:
    radial-gradient(1200px 600px at 10% -10%, color-mix(in oklab, var(--primary) 30%, transparent), transparent),
    radial-gradient(1000px 500px at 90% -20%, color-mix(in oklab, var(--primary-2) 28%, transparent), transparent);}
.cta-row{display:flex;gap:12px;flex-wrap:wrap;margin:16px 0 28px}
.btn{display:inline-block;border:1px solid var(--stroke);padding:10px 14px;border-radius:12px;text-decoration:none;color:var(--text);background:linear-gradient(180deg,rgba(255,255,255,.04),rgba(255,255,255,.02));box-shadow:0 1px 0 rgba(255,255,255,.06) inset;transition:transform .15s ease}
.btn:hover{transform:translateY(-1px);border-color:color-mix(in oklab, var(--primary) 40%, var(--stroke));}
.btn.primary{background:linear-gradient(135deg,var(--primary),var(--primary-2));border-color:transparent;color:#001314}
.card{border:1px solid var(--stroke);border-radius:14px;padding:16px;margin:12px 0;background:var(--card);box-shadow:0 0 0 1px rgba(255,255,255,.02) inset}
.card:hover{border-color:color-mix(in oklab, var(--primary) 35%, var(--stroke))}
label{display:block;margin:8px 0 4px;font-weight:600;color:var(--text)}
input,textarea,select{width:100%;padding:10px;border:1px solid var(--stroke);border-radius:12px;background:#0c0c12;color:var(--text)}
.small{color:var(--muted);font-size:13px}
.result{padding:10px;border:1px dashed var(--stroke);border-radius:12px;background:#0c0c12;color:var(--text)}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:16px}
footer{border-top:1px solid var(--stroke);margin-top:24px;background:#0c0c12}
.copy{font-size:14px;color:var(--muted)}
.ad{border:1px dashed var(--stroke);border-radius:12px;padding:12px;text-align:center;color:var(--muted);margin:16px 0;background:#0c0c12}
a.btn-ghost{color:var(--accent)}