:root{--bg:#0b1020;--panel:#111a33;--panel2:#0f172a;--text:#eaf0ff;--muted:#b8c5e6;--line:#2a3658;--accent:#19d3ff}
*{box-sizing:border-box}body{margin:0;font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;background:radial-gradient(1200px 600px at 80% -20%,#1b2b54 0%,transparent 60%),var(--bg);color:var(--text);line-height:1.6}
.wrap{max-width:1080px;margin:0 auto;padding:24px}
.nav{position:sticky;top:0;background:rgba(11,16,32,.85);backdrop-filter:blur(8px);border-bottom:1px solid var(--line);z-index:10}
.nav .wrap{display:flex;gap:18px;align-items:center;justify-content:space-between}
.brand{font-weight:700;letter-spacing:.2px}.links{white-space:nowrap}.links a{color:var(--muted);text-decoration:none;margin-left:14px;display:inline-block}.links a:hover{color:var(--accent)}
.hero,.card{background:var(--panel);border:1px solid var(--line);border-radius:14px}
.hero{padding:38px;margin-top:26px}.card{padding:24px;margin-top:18px}
h1{font-size:42px;line-height:1.12;margin:0 0 12px}h2{margin:0 0 10px;font-size:28px}h3{margin:16px 0 6px;font-size:20px}
p,li{color:var(--muted)}
a,a:visited{color:var(--accent)}
a:hover{opacity:.9}
a.btn{display:inline-block;margin-right:10px;margin-top:10px;padding:10px 14px;border-radius:10px;text-decoration:none;border:1px solid var(--accent);color:#07101e}
a.primary{background:var(--accent)}a.secondary{color:var(--accent);background:transparent}
ul,ol{padding-left:20px}.small{font-size:14px}.grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
details{background:var(--panel2);border:1px solid var(--line);border-radius:10px;padding:10px 12px;margin:10px 0}
summary{cursor:pointer;color:#d8e6ff;font-weight:600}
summary:hover{color:var(--accent)}
section[id]{scroll-margin-top:90px}
@media (max-width:820px){.links{display:none}.grid{grid-template-columns:1fr}h1{font-size:34px}}
.footer{margin:30px 0;color:#93a4cc;font-size:14px}
.code{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;background:var(--panel2);border:1px solid var(--line);padding:2px 6px;border-radius:6px;color:#cde7ff}
.editor{width:100%;min-height:320px;background:#0a1328;color:#eaf0ff;border:1px solid var(--line);border-radius:10px;padding:12px;font:16px/1.5 Inter,system-ui,Arial,sans-serif}
.row{display:flex;gap:10px;flex-wrap:wrap;margin-top:10px}
.btn2{background:var(--accent);color:#04111c;border:0;border-radius:8px;padding:8px 12px;font-weight:700;cursor:pointer}
.btn2.alt{background:transparent;color:var(--accent);border:1px solid var(--accent)}
.input{width:100%;background:#0a1328;color:#eaf0ff;border:1px solid var(--line);border-radius:10px;padding:10px}
audio{width:100%;margin-top:10px}