:root{
  --bg:#f5f7fb;
  --panel:#ffffff;
  --panel-2:#f9fbff;
  --text:#1f2937;
  --muted:#667085;
  --line:#e5e7eb;
  --line-strong:#d8deea;
  --primary:#7c3aed;
  --primary-2:#8b5cf6;
  --primary-soft:rgba(124,58,237,.12);
  --dark:#0b0f17;
  --success:#157f5b;
  --shadow:0 20px 50px rgba(15,23,42,.08);
  --shadow-md:0 10px 24px rgba(15,23,42,.06);
  --radius-xl:28px;
  --radius-lg:20px;
  --maxw:1200px;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:"Inter","proxima-nova",system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  color:var(--text);
  background:radial-gradient(circle at top left,#fff 0%,transparent 25%),linear-gradient(180deg,#f8f9fc 0%,#eef2f8 100%);
  line-height:1.65;
}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%}
button{font:inherit}
.container{width:min(var(--maxw),calc(100% - 32px));margin:0 auto}
.topbar{
  position:sticky;
  top:0;
  z-index:50;
  background:rgba(8,12,20,.94);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  border-bottom:1px solid rgba(255,255,255,.08);
}
.topbar-inner{
  width:min(var(--maxw),calc(100% - 32px));
  min-height:78px;
  margin:0 auto;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
}
.brand{flex:0 0 auto}
.brand img{width:150px;height:auto}
.topnav{
  display:flex;
  align-items:center;
  justify-content:flex-end;
  gap:10px;
  flex:1 1 auto;
  min-width:0;
  margin-left:auto;
  overflow-x:auto;
  scrollbar-width:none;
}
.topnav::-webkit-scrollbar{display:none}
.topnav a{
  color:#fff;
  opacity:.94;
  font-size:15px;
  padding:10px 12px;
  border-radius:12px;
  white-space:nowrap;
  transition:.18s ease;
}
.topnav a:hover,.topnav a[aria-current="page"]{background:rgba(255,255,255,.1);opacity:1}
.nav-btn.ghost{border:1px solid rgba(255,255,255,.16);background:rgba(255,255,255,.08)}
.hero{
  position:relative;
  overflow:hidden;
  padding:78px 0 72px;
  color:#fff;
  background:
    radial-gradient(circle at 88% 18%,rgba(139,92,246,.5),transparent 28%),
    radial-gradient(circle at 8% 80%,rgba(21,127,91,.26),transparent 32%),
    linear-gradient(135deg,#0b0f17 0%,#16112a 56%,#2e155f 100%);
}
.hero::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);
  background-size:44px 44px;
  mask-image:linear-gradient(to bottom,black,transparent);
}
.hero-inner{position:relative;z-index:1;display:grid;grid-template-columns:minmax(0,1fr) auto;gap:44px;align-items:center}
.breadcrumb{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin:0 0 18px;color:rgba(255,255,255,.72);font-size:14px;font-weight:700}
.breadcrumb a:hover{color:#fff;text-decoration:underline}
.eyebrow{margin:0 0 12px;color:#c4b5fd;font-size:13px;font-weight:900;letter-spacing:.12em;text-transform:uppercase}
.hero h1{max-width:900px;margin:0;font-size:clamp(38px,5vw,66px);line-height:1.04;letter-spacing:-.035em}
.hero .lead{max-width:840px;margin:22px 0 0;color:rgba(255,255,255,.82);font-size:clamp(18px,2vw,22px);line-height:1.55}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:28px}
.hero-icon{
  width:188px;
  aspect-ratio:1;
  padding:24px;
  border:1px solid rgba(255,255,255,.15);
  border-radius:36px;
  background:rgba(255,255,255,.95);
  box-shadow:0 28px 70px rgba(0,0,0,.28);
}
.hero-icon img{width:100%;height:100%;object-fit:contain}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  min-height:46px;
  padding:11px 17px;
  border:1px solid var(--line-strong);
  border-radius:14px;
  background:#fff;
  color:var(--text);
  font-weight:850;
  box-shadow:var(--shadow-md);
  transition:.18s ease;
}
.btn:hover{transform:translateY(-1px);border-color:#c9cfe0}
.btn.primary{border-color:transparent;background:linear-gradient(135deg,var(--primary),var(--primary-2));color:#fff}
.btn.on-dark{border-color:rgba(255,255,255,.22);background:rgba(255,255,255,.1);color:#fff;box-shadow:none}
.section{padding:78px 0}
.section.compact{padding:58px 0}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:18px;margin-bottom:26px}
.section-head h2{margin:0;font-size:clamp(30px,3.6vw,44px);line-height:1.12;letter-spacing:-.025em}
.section-head p{max-width:780px;margin:10px 0 0;color:var(--muted);font-size:17px}
.course-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}
.course-card{
  display:flex;
  flex-direction:column;
  min-height:100%;
  padding:22px;
  border:1px solid var(--line);
  border-radius:22px;
  background:var(--panel);
  box-shadow:var(--shadow-md);
  transition:.18s ease;
}
.course-card:hover{transform:translateY(-3px);border-color:#d4c8f8;box-shadow:var(--shadow)}
.course-card img{width:76px;height:76px;object-fit:contain;margin-bottom:12px}
.course-card .code{display:inline-flex;align-self:flex-start;margin-bottom:8px;padding:4px 9px;border-radius:999px;background:var(--primary-soft);color:#5b21b6;font-size:13px;font-weight:900}
.course-card h2,.course-card h3{margin:0 0 10px;font-size:22px;line-height:1.25}
.course-card p{margin:0 0 18px;color:var(--muted)}
.course-card .btn{align-self:flex-start;margin-top:auto}
.course-card.soon{background:rgba(255,255,255,.68)}
.course-card.soon .btn{box-shadow:none}
.intro-panel{
  margin-bottom:28px;
  padding:24px;
  border:1px solid rgba(124,58,237,.18);
  border-radius:22px;
  background:linear-gradient(135deg,rgba(124,58,237,.08),rgba(21,127,91,.08));
  box-shadow:var(--shadow-md);
}
.intro-panel h2{margin:0 0 8px;font-size:26px}
.intro-panel p{margin:0;color:var(--muted);font-size:17px}
.content-layout{display:grid;grid-template-columns:minmax(0,1fr) 330px;gap:24px;align-items:start}
.content-stack{display:grid;gap:20px}
.content-card{
  padding:28px;
  border:1px solid var(--line);
  border-radius:24px;
  background:var(--panel);
  box-shadow:var(--shadow-md);
}
.content-card h2{margin:0 0 14px;font-size:30px;line-height:1.2;letter-spacing:-.02em}
.content-card h3{margin:22px 0 8px;font-size:20px;line-height:1.25}
.content-card p{margin:0 0 14px;color:#3f4a5a}
.content-card p:last-child{margin-bottom:0}
.content-card ul{margin:0;padding-left:21px}
.content-card li+li{margin-top:8px}
.info-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
.info-item{padding:16px;border:1px solid var(--line);border-radius:18px;background:#fbfcff}
.info-item span{display:block;margin-bottom:5px;color:var(--muted);font-size:12px;font-weight:900;letter-spacing:.08em;text-transform:uppercase}
.info-item strong{display:block;font-size:18px;line-height:1.35}
.level-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
.level-card{padding:18px;border:1px solid var(--line);border-radius:18px;background:#fbfcff}
.level-card h3{margin:0 0 8px;color:#4c1d95;font-size:19px}
.level-card p{margin:0;color:var(--muted)}
.chips{display:flex;flex-wrap:wrap;gap:10px}
.chip{padding:9px 13px;border:1px solid var(--line-strong);border-radius:999px;background:#fff;font-weight:800}
.chip strong{color:var(--primary)}
.side-card{
  position:sticky;
  top:100px;
  padding:22px;
  border:1px solid var(--line);
  border-radius:22px;
  background:#fff;
  box-shadow:var(--shadow-md);
}
.side-card h2{margin:0 0 10px;font-size:24px;line-height:1.2}
.side-card p{margin:0 0 16px;color:var(--muted)}
.side-card .info-grid{margin-bottom:18px}
.side-card .btn{width:100%}
.side-card .btn+.btn{margin-top:10px}
.mini-list{margin:18px 0 0;padding:18px 0 0;border-top:1px solid var(--line);list-style:none}
.mini-list li{display:flex;gap:9px;align-items:flex-start;color:#3f4a5a}
.mini-list li+li{margin-top:10px}
.mini-list li::before{content:"✓";color:var(--success);font-weight:900}
.related-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
.related-link{padding:18px;border:1px solid var(--line);border-radius:18px;background:#fff;box-shadow:var(--shadow-md);font-weight:850}
.related-link span{display:block;margin-top:3px;color:var(--muted);font-size:14px;font-weight:600}
.related-link:hover{border-color:#d4c8f8;color:#5b21b6}
.cta-band{padding:34px;border-radius:28px;color:#fff;background:linear-gradient(135deg,#16112a,#5b21b6);box-shadow:var(--shadow)}
.cta-band h2{margin:0 0 8px;font-size:32px;line-height:1.15}
.cta-band p{max-width:760px;margin:0;color:rgba(255,255,255,.78)}
.cta-band .hero-actions{margin-top:20px}
footer{padding:24px 0;background:var(--dark);color:#fff}
.foot{display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap}
.foot-links{display:flex;gap:14px;flex-wrap:wrap}
footer a{opacity:.9}
footer a:hover{opacity:1;text-decoration:underline}
:focus-visible{outline:3px solid #c4b5fd;outline-offset:3px}

@media (max-width:1020px){
  .course-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .content-layout{grid-template-columns:1fr}
  .side-card{position:static}
}
@media (max-width:760px){
  .container,.topbar-inner{width:min(var(--maxw),calc(100% - 24px))}
  .topbar-inner{min-height:auto;padding:12px 0;flex-direction:column;align-items:flex-start;gap:10px}
  .brand img{width:132px}
  .topnav{width:100%;justify-content:flex-start;margin:0;gap:5px}
  .topnav a{padding:8px 10px;font-size:14px}
  .hero{padding:50px 0}
  .hero-inner{grid-template-columns:1fr;gap:28px}
  .hero-icon{width:130px;border-radius:26px;order:-1}
  .section{padding:56px 0}
  .section.compact{padding:44px 0}
  .course-grid,.info-grid,.level-grid,.related-grid{grid-template-columns:1fr}
  .section-head{align-items:flex-start;flex-direction:column}
  .content-card{padding:21px}
  .content-card h2{font-size:26px}
  .cta-band{padding:26px 22px}
}