:root{
  --bg:#0b0f14; --panel:#111820; --panel-2:#0e141b; --line:#1f2a35;
  --text:#e6edf3; --muted:#93a1ae; --dim:#8695a2;
  --accent:#4ade80; --accent-ink:#052e16; --amber:#fbbf24;
  --mono:ui-monospace,SFMono-Regular,"SF Mono",Menlo,Consolas,monospace;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--text);
  font:16px/1.65 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  -webkit-font-smoothing:antialiased;
}
.wrap{max-width:1060px;margin:0 auto;padding:0 24px}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3{line-height:1.15;letter-spacing:-.02em;margin:0}
h1{font-size:clamp(2.1rem,5vw,3.4rem);font-weight:800}
h2{font-size:clamp(1.5rem,3vw,2.1rem);font-weight:750;margin-bottom:.6rem}
h3{font-size:1.15rem;font-weight:650}
p{margin:.6rem 0}
.muted{color:var(--muted)}
.small{font-size:.9rem}

/* nav */
.nav{border-bottom:1px solid var(--line);background:rgba(11,15,20,.85);backdrop-filter:blur(8px);position:sticky;top:0;z-index:20}
.nav .wrap{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{display:flex;align-items:center;gap:10px;font-weight:750;letter-spacing:-.01em;color:var(--text)}
.brand:hover{text-decoration:none}
.brand .mark{width:26px;height:26px;border:1.5px solid var(--accent);border-radius:7px;display:grid;place-items:center;font:700 12px var(--mono);color:var(--accent)}
.nav-links{display:flex;gap:22px;align-items:center}
.nav-links a{color:var(--muted);font-size:.94rem}
.nav-links a:hover{color:var(--text);text-decoration:none}
.nav-links a.btn{color:var(--accent-ink)}
.nav-links a.btn:hover{color:var(--accent-ink)}

/* hero */
.hero{padding:84px 0 64px;border-bottom:1px solid var(--line);
  background:
    radial-gradient(900px 380px at 12% -10%,rgba(74,222,128,.09),transparent 70%),
    radial-gradient(700px 300px at 92% 0%,rgba(251,191,36,.05),transparent 70%);
}
.eyebrow{font:600 .78rem var(--mono);letter-spacing:.14em;text-transform:uppercase;color:var(--accent);margin-bottom:18px}
.lede{font-size:clamp(1.05rem,2vw,1.25rem);color:var(--muted);max-width:43rem;margin-top:18px}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:start}
.terminal{border:1px solid var(--line);border-radius:12px;overflow:hidden;background:#070b0f;box-shadow:0 24px 60px rgba(0,0,0,.45)}
.terminal .bar{display:flex;gap:6px;padding:11px 14px;border-bottom:1px solid var(--line);background:#0d131a}
.terminal .dot{width:10px;height:10px;border-radius:50%;background:#243040}
.terminal pre{margin:0;padding:18px;font:13px/1.6 var(--mono);color:#c8d4de;overflow-x:auto}
.terminal .c{color:#5b6b7a}.terminal .g{color:var(--accent)}.terminal .y{color:var(--amber)}

/* form */
.signup{display:flex;gap:10px;margin-top:26px;flex-wrap:wrap}
.signup input{
  flex:1 1 260px;min-width:0;padding:13px 15px;border-radius:9px;border:1px solid #2a3744;
  background:#0d141b;color:var(--text);font-size:1rem;
}
.signup input:focus{outline:2px solid rgba(74,222,128,.35);border-color:var(--accent)}
.btn{
  display:inline-block;padding:13px 20px;border-radius:9px;border:1px solid var(--accent);
  background:var(--accent);color:var(--accent-ink);font-weight:700;font-size:1rem;cursor:pointer;
}
.btn:hover{filter:brightness(1.06);text-decoration:none}
.btn-ghost{background:transparent;color:var(--text);border-color:#2a3744}
.btn-ghost:hover{border-color:var(--accent);color:var(--accent)}
#formmsg{min-height:1.4em;font-size:.9rem;margin-top:10px;color:var(--muted)}
#formmsg.ok{color:var(--accent)} #formmsg.err{color:#f87171}
.fineprint{color:var(--dim);font-size:.82rem;margin-top:8px}
.hp{position:absolute;left:-9999px;width:1px;height:1px;opacity:0}

/* sections */
section{padding:72px 0;border-bottom:1px solid var(--line)}
.grid{display:grid;gap:20px}
.g3{grid-template-columns:repeat(3,1fr)}
.g2{grid-template-columns:repeat(2,1fr)}
.card{border:1px solid var(--line);border-radius:12px;padding:22px;background:var(--panel)}
.card p{color:var(--muted);font-size:.95rem}
.card .num{font:700 .8rem var(--mono);color:var(--accent);letter-spacing:.08em}

/* list */
ul.checks{list-style:none;padding:0;margin:18px 0 0}
ul.checks li{position:relative;padding-left:26px;margin:10px 0;color:var(--muted)}
ul.checks li:before{content:"";position:absolute;left:0;top:.55em;width:12px;height:7px;border-left:2px solid var(--accent);border-bottom:2px solid var(--accent);transform:rotate(-45deg)}

/* curriculum */
.mod{display:flex;gap:18px;padding:16px 0;border-bottom:1px solid var(--line)}
.mod:last-child{border-bottom:0}
.mod .n{font:700 .82rem var(--mono);color:var(--accent);min-width:34px;padding-top:3px}
.mod h3{margin:0 0 4px}
.mod p{margin:0;color:var(--muted);font-size:.94rem}

/* pricing */
.price-box{border:1px solid var(--accent);border-radius:14px;padding:30px;background:linear-gradient(180deg,rgba(74,222,128,.06),transparent)}
.price{font-size:2.6rem;font-weight:800;letter-spacing:-.03em}
.price s{color:var(--dim);font-size:1.2rem;font-weight:500;margin-left:10px}

/* prose (articles) */
.prose{max-width:760px;margin:0 auto}
.prose h2{margin-top:2.2rem}
.prose h3{margin-top:1.6rem}
.prose p,.prose li{color:#c3ced8}
.prose code{font:0.9em var(--mono);background:#141d26;border:1px solid var(--line);padding:1px 5px;border-radius:4px}
.prose pre{background:#070b0f;border:1px solid var(--line);border-radius:10px;padding:18px;overflow-x:auto}
.prose pre code{background:none;border:0;padding:0;font-size:13px;line-height:1.6}
pre{overflow-x:auto;max-width:100%;-webkit-overflow-scrolling:touch}
pre code{font:13px/1.6 var(--mono);white-space:pre}
img,table,iframe{max-width:100%}
.prose blockquote{border-left:3px solid var(--accent);margin:1.4rem 0;padding:.2rem 0 .2rem 1rem;color:var(--muted)}
.prose table{width:100%;border-collapse:collapse;margin:1.4rem 0;font-size:.94rem}
.prose th,.prose td{border:1px solid var(--line);padding:9px 12px;text-align:left}
.prose th{background:var(--panel)}
.meta{font:600 .78rem var(--mono);letter-spacing:.1em;text-transform:uppercase;color:var(--dim);margin-bottom:14px}

/* footer */
footer{padding:44px 0;color:var(--dim);font-size:.88rem}
footer .wrap{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap}

@media(max-width:860px){
  .hero-grid{grid-template-columns:1fr}
  .g3{grid-template-columns:1fr}
  .g2{grid-template-columns:1fr}
  .nav .wrap{height:auto;padding:10px 0;flex-wrap:wrap;gap:10px 14px}
  .nav .brand{font-size:1.02rem}
  .nav-links{flex:1 1 100%;min-width:0;flex-wrap:wrap;gap:10px 12px}
  .nav-links a[href^="#"]:not(.btn){display:none}
  .nav-links a{font-size:.85rem;white-space:nowrap}
  .nav-links a.btn{padding:7px 12px;font-size:.85rem}
  .hero{padding:56px 0 48px}
  section{padding:52px 0}
}