:root{--bg-deep:#04060f;--bg-card:rgba(255,255,255,.03);--bg-glass:rgba(255,255,255,.06);--border-glass:rgba(255,255,255,.10);--cyan:#38bdf8;--violet:#a78bfa;--emerald:#34d399;--amber:#fbbf24;--grad:linear-gradient(135deg,#0ea5e9,#7c3aed);--text:#f0f4ff;--muted:rgba(240,244,255,.65);--display:'Arial Black',Arial,sans-serif;--body:Arial,sans-serif}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg-deep);color:var(--text);font-family:var(--body);line-height:1.6}body:before{content:'';position:fixed;inset:0;z-index:-1;background:radial-gradient(ellipse 80% 60% at 20% 0,rgba(14,165,233,.1),transparent 60%),radial-gradient(ellipse 60% 50% at 90% 80%,rgba(124,58,237,.1),transparent 60%)}a{text-decoration:none;color:inherit}.container{width:min(1680px,calc(100% - 48px));margin:auto}.navbar{position:sticky;top:0;z-index:10;background:rgba(4,6,15,.8);border-bottom:1px solid var(--border-glass);backdrop-filter:blur(18px)}.nav{height:82px;display:flex;align-items:center;justify-content:space-between;gap:16px}.brand{font:800 1.45rem var(--display);white-space:nowrap}.brand b{color:var(--cyan)}.links{display:flex;align-items:center;gap:4px}.links a,.dropbtn{padding:8px 10px;color:var(--muted);font-size:.88rem;background:none;border:0;white-space:nowrap;cursor:pointer}.drop{position:relative}.dropmenu{position:absolute;top:40px;left:50%;width:235px;padding:8px;border:1px solid var(--border-glass);border-radius:14px;background:rgba(10,14,26,.92);box-shadow:0 10px 30px #000;opacity:0;visibility:hidden;transform:translate(-50%,-6px);transition:.2s}.drop:hover .dropmenu,.drop:focus-within .dropmenu{opacity:1;visibility:visible;transform:translate(-50%,0)}.dropmenu a{display:block;border-radius:8px}.dropmenu a:hover{background:var(--bg-glass);color:var(--cyan)}.navcta{display:flex;gap:8px;white-space:nowrap}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 18px;border:1px solid var(--border-glass);border-radius:11px;font-weight:700}.primary{border:0;background:var(--grad);box-shadow:0 8px 25px rgba(14,165,233,.22)}.hero{padding:92px 0 65px}.eyebrow{display:inline-block;padding:8px 13px;border:1px solid rgba(52,211,153,.35);border-radius:50px;background:rgba(52,211,153,.08);color:var(--emerald);font-size:.82rem;font-weight:700}.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:50px;align-items:center}.hero h1{font:800 clamp(2.6rem,5vw,5rem)/1.04 var(--display);letter-spacing:-.07em;margin:18px 0}.gradient{background:var(--grad);background-clip:text;color:transparent}.lead{color:var(--muted);max-width:650px;font-size:1.08rem}.actions{display:flex;gap:12px;margin-top:26px;flex-wrap:wrap}.hero-card,.card,.module{background:var(--bg-card);border:1px solid var(--border-glass);border-radius:20px;backdrop-filter:blur(12px)}.hero-card{padding:28px;box-shadow:0 25px 60px rgba(0,0,0,.35)}.facts{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:18px}.fact{padding:14px;border-radius:12px;background:var(--bg-glass)}.fact strong{display:block;color:var(--cyan)}section{padding:72px 0}.label{color:var(--cyan);font-size:.78rem;font-weight:800;letter-spacing:.12em;text-transform:uppercase}.title{font:800 clamp(2rem,3vw,3rem)/1.1 var(--display);margin:9px 0 14px}.sub{color:var(--muted);max-width:750px}.overview{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:30px}.card{padding:22px}.card h3{margin:0 0 9px;font-size:1rem}.card p{margin:0;color:var(--muted);font-size:.92rem}.curriculum{margin-top:26px;display:grid;gap:12px}.module{overflow:hidden}.module summary{display:flex;align-items:center;gap:14px;padding:18px 20px;cursor:pointer;list-style:none;font-weight:800}.module summary::-webkit-details-marker{display:none}.num{display:grid;place-items:center;width:34px;height:34px;border-radius:10px;background:var(--grad);font-size:.78rem}.module summary:after{content:'+';margin-left:auto;color:var(--cyan);font-size:1.4rem}.module[open] summary:after{content:'−'}.topics{display:flex;flex-wrap:wrap;gap:9px;padding:0 20px 20px;border-top:1px solid var(--border-glass)}.topics span{margin-top:15px;padding:7px 10px;border-radius:50px;background:rgba(56,189,248,.08);border:1px solid rgba(56,189,248,.17);color:var(--muted);font-size:.84rem}.cta{padding:42px;border-radius:24px;background:linear-gradient(135deg,rgba(14,165,233,.18),rgba(124,58,237,.22));border:1px solid var(--border-glass);text-align:center}.footer{padding:45px 0;color:var(--muted);border-top:1px solid var(--border-glass);font-size:.9rem}.footer strong{color:var(--text)}@media(max-width:1000px){.links{display:none}.hero-grid{grid-template-columns:1fr}.overview{grid-template-columns:1fr 1fr}}@media(max-width:600px){.container{width:min(100% - 32px,1680px)}.nav{height:70px}.navcta .btn:first-child{display:none}.navcta .btn{padding:10px 12px;font-size:.85rem}.hero{padding-top:58px}.overview{grid-template-columns:1fr}.facts{grid-template-columns:1fr}.hero h1{letter-spacing:-.05em}}

/* Shared course-page header refinement */
@media (min-width: 1001px) {
  .container {
    width: min(1400px, calc(100% - 48px));
  }

  .nav {
    height: 96px;
    gap: 22px;
  }

  .links {
    gap: 6px;
  }

  .links a,
  .dropbtn {
    padding: 9px 12px;
    font-size: 0.9rem;
    border-radius: 8px;
  }

  .links a:hover,
  .dropbtn:hover {
    color: var(--text);
    background: var(--bg-glass);
  }

  .navcta {
    gap: 12px;
  }

  .navcta .btn {
    min-height: 46px;
    padding: 11px 18px;
    border-radius: 12px;
  }

  .navcta .primary {
    color: var(--text);
    background: var(--grad);
    box-shadow: 0 8px 25px rgba(14, 165, 233, 0.22);
  }

  .dropmenu {
    top: 46px;
    width: 250px;
    padding: 9px;
  }
}