:root{
  --bg:#0b0b0f;
  --bg-alt:#111117;
  --card:#151521;
  --text:#e7e7ec;
  --muted:#a1a1b3;
  --brand:#7c4dff;
  --brand-2:#a78bfa;
  --stroke:#262638;
  --success:#22c55e;
  --danger:#ef4444;
  --radius:14px;
  --shadow:0 10px 30px rgba(0,0,0,.35);
}

*{box-sizing:border-box}
html,body{margin:0;padding:0;background:var(--bg);color:var(--text);font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;line-height:1.6}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
.container{width:min(1120px, 92vw);margin-inline:auto}
.lead{font-size:1.1rem;color:var(--muted)}

.site-header{position:sticky;top:0;z-index:50;background:rgba(11,11,15,.65);backdrop-filter:saturate(180%) blur(12px);border-bottom:1px solid var(--stroke);}
.site-header .logo{display:flex;align-items:center;gap:.6rem;padding:.9rem 1rem;font-weight:700}
.site-header .logo span{letter-spacing:.3px}
.nav{margin-left:auto;padding-right:1rem;display:flex;align-items:center;gap:.5rem}
.nav__toggle{display:none;background:none;border:1px solid var(--stroke);color:var(--text);padding:.55rem .8rem;border-radius:.7rem}
.nav__list{display:flex;gap:.3rem;list-style:none;padding:0;margin:0}
.nav__list a{padding:.6rem .9rem;border-radius:.6rem;display:inline-block;color:var(--muted)}
.nav__list a:hover{background:var(--bg-alt);color:var(--text)}
.btn{display:inline-block;background:var(--brand);color:#fff;padding:.9rem 1.1rem;border-radius:.8rem;font-weight:600;box-shadow:var(--shadow);border:1px solid transparent;transition:.2s}
.btn:hover{transform:translateY(-1px);box-shadow:0 14px 34px rgba(124,77,255,.3)}
.btn--ghost{background:transparent;border-color:var(--stroke);box-shadow:none;color:var(--text)}
.btn--small{padding:.45rem .8rem;font-size:.95rem}
.btn--lg{padding:1rem 1.4rem;font-size:1.05rem}
.btn--xl{padding:1.05rem 1.5rem;font-size:1.15rem}

.hero{padding:4.5rem 0 3rem;border-bottom:1px solid var(--stroke);background:
 radial-gradient(800px 400px at 20% 10%, rgba(124,77,255,.25), transparent),
 radial-gradient(600px 300px at 90% 10%, rgba(167,139,250,.18), transparent);}
.hero__grid{display:grid;gap:2rem;grid-template-columns:1fr}
.hero__content h1{font-size:clamp(1.8rem, 2.5vw + 1.4rem, 3rem);line-height:1.15;margin:0 0 .6rem}
.meta{color:var(--muted);font-size:.95rem}
.poster{display:grid;place-items:center;height:280px;border-radius:var(--radius);border:1px dashed var(--stroke);background:var(--card);color:var(--muted);font-weight:600}
.hero__media figcaption{color:var(--muted);font-size:.85rem;margin-top:.6rem}

.price{display:flex;align-items:center;gap:.8rem;margin:1rem 0}
.price__old{text-decoration:line-through;color:#9b93b8}
.price__new{font-size:1.8rem;font-weight:800;color:#fff}
.badge{display:inline-block;background:linear-gradient(90deg,var(--brand),var(--brand-2));color:#fff;padding:.25rem .6rem;border-radius:999px;font-size:.8rem}

.section{padding:3.2rem 0;border-bottom:1px solid var(--stroke)}
.section--alt{background:var(--bg-alt)}
.cards{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1rem}
.card{background:var(--card);border:1px solid var(--stroke);border-radius:var(--radius);padding:1rem}
.card h3{margin:.2rem 0 .3rem}
.list{padding-left:1.1rem}
.list li{margin:.25rem 0}
.bullets{padding-left:1.1rem}
.bullets li{margin:.25rem 0;list-style:square}

.accordion{display:grid;gap:.6rem}
.acc{background:var(--card);border:1px solid var(--stroke);border-radius:var(--radius);padding:.1rem .9rem}
.acc summary{cursor:pointer;list-style:none;padding:.9rem 0;font-weight:600}
.acc summary::-webkit-details-marker{display:none}
.acc__content{color:var(--muted);padding:.25rem 0 1rem}

.grid-2{display:grid;gap:1rem;grid-template-columns:1fr}
.note{background:var(--card);border:1px solid var(--stroke);border-radius:var(--radius);padding:1rem}

.teacher{display:grid;gap:1.2rem;grid-template-columns:1fr}
.teacher__media .avatar{width:120px;height:120px;border-radius:50%;background:linear-gradient(90deg,var(--brand),var(--brand-2));display:grid;place-items:center;color:#0b0b0f;font-weight:800;font-size:2rem}

.price-block .price-card{display:grid;grid-template-columns:1fr;gap:1rem;background:var(--card);border:1px solid var(--stroke);border-radius:var(--radius);padding:1.2rem}
.price-card__left .price{margin-bottom:.3rem}
.small li{font-size:.95rem;color:var(--text)}
.muted{color:var(--muted);font-size:.9rem}
.guarantee{margin-top:.8rem;padding:.7rem 1rem;border:1px dashed var(--stroke);border-radius:.6rem;background:rgba(124,77,255,.06)}

.section--cta{background:
 radial-gradient(800px 300px at 50% -5%, rgba(124,77,255,.2), transparent);
 text-align:center}
.cta-final h2{margin:0 0 1rem}

.site-footer{padding:1.2rem 0;color:var(--muted)}
.footer__grid{display:flex;align-items:center;justify-content:space-between;gap:1rem;flex-wrap:wrap;border-top:1px solid var(--stroke);padding-top:1rem}
.footer__nav a{margin-left:.9rem;color:var(--muted)}
.footer__nav a:hover{color:var(--text)}

@media (min-width: 880px){
  .hero__grid{grid-template-columns:1.1fr .9fr;align-items:center}
  .cards{grid-template-columns:repeat(4,1fr)}
  .grid-2{grid-template-columns:1.1fr .9fr}
  .teacher{grid-template-columns:1.1fr .9fr;align-items:center}
  .price-block .price-card{grid-template-columns:1fr .9fr;align-items:center}
  .nav__toggle{display:none}
}

@media (max-width: 799px){
  .nav__toggle{display:inline-block}
  .nav__list{display:none;position:absolute;right:.8rem;top:3.1rem;background:var(--bg-alt);border:1px solid var(--stroke);border-radius:.8rem;flex-direction:column;box-shadow:var(--shadow)}
  .nav__list.show{display:flex}
  .nav__list a{padding:.8rem 1rem}
}