:root{--bg:#0A0A0A;--panel:#121212;--line:rgba(255,255,255,.08);--fg:#F4F4F0;--muted:#A7A7A0;--lime:#BFFF00;--lime-ink:#0A0A0A}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--fg);font:16px/1.65 "Outfit","Avenir Next","Segoe UI",sans-serif;-webkit-font-smoothing:antialiased}
a{color:var(--lime);text-decoration:none}a:hover{text-decoration:underline}
.skip{position:absolute;left:-999px;top:0}.skip:focus{left:12px;top:12px;background:var(--lime);color:var(--lime-ink);padding:8px 12px;border-radius:8px;z-index:9}
.top{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:18px clamp(16px,5vw,64px);border-bottom:1px solid var(--line);background:rgba(10,10,10,.85);backdrop-filter:blur(16px);position:sticky;top:0;z-index:5}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;letter-spacing:.02em;color:var(--fg);font-size:18px;white-space:nowrap}
@media(max-width:720px){.top{position:static;flex-direction:column;align-items:flex-start;gap:12px}.top nav{gap:12px 16px}}
.brand .dot{width:12px;height:12px;border-radius:50%;background:var(--lime);box-shadow:0 0 24px var(--lime)}
.top nav{display:flex;align-items:center;gap:22px;flex-wrap:wrap}.top nav a{color:var(--muted);font-weight:600;font-size:14px}.top nav a:hover{color:var(--fg);text-decoration:none}
.btn{display:inline-block;background:var(--lime);color:var(--lime-ink)!important;font-weight:800;padding:10px 18px;border-radius:999px;transition:transform .15s ease,background-color .15s ease}.btn:hover{background:#D4FF4D;transform:translateY(-1px);text-decoration:none}
.btn.big{font-size:18px;padding:14px 28px;margin-top:8px}
.wrap{max-width:960px;margin:0 auto;padding:clamp(28px,6vw,72px) clamp(16px,5vw,32px) 48px}
.crumb{color:var(--muted);font-size:13px;margin:0 0 16px}.crumb span{margin:0 8px;opacity:.5}.crumb a{color:var(--muted)}
h1{font-size:clamp(2.1rem,5vw,3.6rem);line-height:1.08;letter-spacing:-.02em;margin:0 0 18px;font-weight:900}
.lead{font-size:clamp(1.05rem,2vw,1.3rem);color:var(--muted);max-width:760px;margin:0 0 40px}
h2{font-size:clamp(1.25rem,2.4vw,1.6rem);line-height:1.25;margin:0 0 10px;letter-spacing:-.01em}
h3{font-size:1.1rem;margin:0 0 6px}
section{margin:0 0 48px}
.toc{border:1px solid var(--line);background:var(--panel);border-radius:14px;padding:16px 18px;font-size:14px;line-height:1.9;margin-bottom:36px;color:var(--muted)}
.qa{border-top:1px solid var(--line);padding:26px 0}.qa p{margin:0;color:#DADAD3;max-width:800px}
.grid2{display:grid;grid-template-columns:1fr;gap:32px}@media(min-width:820px){.grid2{grid-template-columns:1.1fr .9fr}}
.facts,.books{list-style:none;padding:0;margin:14px 0 0}
.facts li{padding:8px 0;border-top:1px solid var(--line);color:#DADAD3}.facts b{display:inline-block;min-width:120px;color:var(--lime);font-weight:700}
.books li{padding:12px 14px;margin:0 0 8px;border:1px solid var(--line);border-radius:12px;background:var(--panel)}.books strong{display:block}.books span{display:block;color:var(--muted);font-size:13.5px;margin-top:2px}
.course{border:1px solid var(--line);border-radius:18px;background:var(--panel);padding:24px;margin-bottom:18px;transition:border-color .2s ease}.course:hover{border-color:rgba(191,255,0,.4)}
.course header p{margin:0;color:#DADAD3}.course .meta{color:var(--lime);font-size:13px;font-weight:700;text-transform:uppercase;letter-spacing:.08em;margin:0 0 8px}
.eps{list-style:none;padding:0;margin:16px 0 0}.eps li{display:grid;grid-template-columns:28px 1fr auto;gap:10px;padding:9px 0;border-top:1px solid var(--line);font-size:15px;align-items:baseline}
.eps .n{color:var(--lime);font-weight:800;font-variant-numeric:tabular-nums}.eps .m{color:var(--muted);font-size:13px;white-space:nowrap}
.cta-box{border:1px solid rgba(191,255,0,.35);background:radial-gradient(120% 140% at 0% 0%,rgba(191,255,0,.14),transparent 60%),var(--panel);border-radius:22px;padding:clamp(24px,4vw,40px);margin-top:56px}
.cta-box p{color:#DADAD3;max-width:640px}.cta-box .link{display:block;margin-top:16px;font-weight:600}
.foot{border-top:1px solid var(--line);padding:28px clamp(16px,5vw,64px) 48px;color:var(--muted);font-size:13px;line-height:1.9}.foot a{color:var(--muted)}
::selection{background:var(--lime);color:var(--lime-ink)}