:root{
  --bg: #0b0f1a;
  --card: #12182a;
  --text: #e6ecff;
  --muted: #a7b0c9;
  --brand: #7aa2ff;
  --brand-2: #9bffd6;
  --border: #24304d;
  --shadow: 0 10px 30px rgba(0,0,0,.35);
  --radius: 18px;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0;background:var(--bg);color:var(--text);font:16px/1.6 system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,Cantarell,Noto Sans,"Helvetica Neue",Arial}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%;height:auto;display:block;border-radius:var(--radius)}
.container{width:min(1100px,90%);margin-inline:auto}
.narrow{width:min(820px,92%)}
.section{padding:64px 0}
.section.alt{background:linear-gradient(180deg,#0b1020,#0b0f1a)}
.section-title{margin-top:0;margin-bottom:24px}
.grid-3{display:grid;gap:20px;grid-template-columns:repeat(3,1fr)}
.grid-2{display:grid;gap:16px;grid-template-columns:repeat(2,1fr)}
.grid-3>*,.grid-2>*{min-width:0}
@media (max-width:900px){.grid-3{grid-template-columns:1fr 1fr}}
@media (max-width:640px){.grid-3,.grid-2{grid-template-columns:1fr}}

/* Header */
.site-header{position:sticky;top:0;z-index:50;background:rgba(11,15,26,.85);backdrop-filter:saturate(180%) blur(10px);border-bottom:1px solid var(--border)}
.nav{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:12px 0}
.brand{font-weight:700;letter-spacing:.3px}
.menu{display:flex;gap:14px;align-items:center}
.menu a{padding:8px 10px;border-radius:10px}
.menu a.active,.menu a:hover{background:rgba(122,162,255,.12)}
.nav-toggle{display:none;background:transparent;color:var(--text);font-size:22px;border:1px solid var(--border);border-radius:12px;padding:6px 10px}
@media (max-width:860px){
  .menu{display:none;position:absolute;right:5%;top:60px;background:#0c1120;border:1px solid var(--border);border-radius:16px;padding:12px;box-shadow:var(--shadow);flex-direction:column;min-width:240px}
  .menu.open{display:flex}
  .nav-toggle{display:inline-flex}
}

/* Hero */
.hero{padding:56px 0;background:radial-gradient(1200px 500px at 70% -10%,rgba(122,162,255,.15),transparent),radial-gradient(800px 400px at 0% 30%,rgba(155,255,214,.09),transparent)}
.hero-inner{display:grid;gap:28px;grid-template-columns:1.2fr .8fr;align-items:center}
@media (max-width:900px){.hero-inner{grid-template-columns:1fr}}
.hero h1{margin:0 0 12px}
.actions{display:flex;gap:12px;margin-top:14px}

/* Cards & UI */
.card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:18px;box-shadow:var(--shadow)}
.course .meta,.meta{list-style:none;padding:0;margin:10px 0 0;display:flex;gap:12px;color:var(--muted);font-size:.95rem;flex-wrap:wrap}
.price{font-weight:700;margin:8px 0 12px}
.link{display:inline-block;margin-top:8px}

/* Forms */
.form{display:grid;gap:12px}
.form input,.form select,.form textarea{width:100%;padding:12px 13px;border-radius:12px;border:1px solid var(--border);background:#0c1222;color:var(--text)}
.form button{justify-self:start}
.form-note{color:var(--muted);font-size:.95rem}

/* CTA */
.cta{padding:64px 0;background:linear-gradient(90deg,rgba(122,162,255,.15),rgba(155,255,214,.1))}
.cta-inner{text-align:center}

/* Footer */
.site-footer{padding:30px 0;border-top:1px solid var(--border);background:#0a0f1d}
.footer-grid{display:grid;gap:18px;grid-template-columns:2fr 1fr 1fr}
.footer-grid h4{margin:.3rem 0 .4rem}
.footer-grid ul{list-style:none;padding:0;margin:0}
.legal{text-align:center;color:var(--muted);font-size:.95rem;margin:18px 0 0}
@media (max-width:900px){.footer-grid{grid-template-columns:1fr}}

/* Utilities */
.list{display:grid;gap:10px;padding-left:1.0rem}
.list li{margin-left:.2rem}
.checklist{list-style: "✔  "; padding-left: 1rem}