:root{
  --bg1:#0f172a; --bg2:#0ea5a4; --accent:#7c3aed;
  --glass: rgba(255,255,255,0.04);
  --muted:#9aa4b2;
  --card:#071226;
}
*{box-sizing:border-box}
body{margin:0;font-family:Inter,Segoe UI,Arial,sans-serif;color:#eaf6ff;background:linear-gradient(135deg,#0f172a,#07122a);-webkit-font-smoothing:antialiased}
.container{max-width:1200px;margin:0 auto;padding:0 20px}

/* Header */
.site-header{position:fixed;top:0;left:0;right:0;z-index:120;background:linear-gradient(180deg,rgba(2,6,23,0.6),rgba(2,6,23,0.25));backdrop-filter:blur(6px);border-bottom:1px solid rgba(255,255,255,0.02)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:72px;padding:0 10px}
.logo{color:#fff;font-weight:800;font-size:20px;text-decoration:none}
.nav-list{list-style:none;display:flex;gap:12px;align-items:center;margin:0;padding:0}
.nav-list a,.drop-toggle{color:#eaf6ff;text-decoration:none;padding:8px 12px;border-radius:8px;font-weight:600;background:transparent;border:none;cursor:pointer}
.nav-list a:hover,.drop-toggle:hover{background:var(--glass);color:#fff}

/* dropdown */
.has-dropdown{position:relative}
.dropdown{position:absolute;top:calc(100% + 10px);left:0;background:linear-gradient(180deg,#071124,#0b1a2a);padding:10px;border-radius:12px;min-width:220px;box-shadow:0 10px 30px rgba(2,6,23,0.6);opacity:0;transform:translateY(-6px);pointer-events:none;transition:all .18s}
.has-dropdown.open .dropdown{opacity:1;transform:translateY(0);pointer-events:auto}
.dropdown li{list-style:none}
.dropdown a{display:block;padding:10px 12px;color:#d7e9ff;text-decoration:none;border-radius:8px}
.dropdown a:hover{background:rgba(255,255,255,0.03);color:var(--accent)}

/* header actions */
.header-actions{display:flex;gap:12px;align-items:center}
.btn-outline{background:transparent;border:1px solid rgba(255,255,255,0.08);color:#eaf6ff;padding:8px 12px;border-radius:8px;cursor:pointer}

/* hamburger */
.hamburger{display:none;width:42px;height:36px;border-radius:8px;border:none;background:transparent;position:relative}
.hamburger span{display:block;height:3px;background:#eaf6ff;margin:6px 8px;border-radius:2px;transition:transform .25s,opacity .2s}

/* HERO */
.hero{min-height:78vh;display:flex;align-items:center;padding:120px 0;position:relative;overflow:hidden}
.particles-canvas{position:absolute;inset:0;z-index:0;opacity:.28}
.hero-inner{display:flex;gap:40px;align-items:center;z-index:2}
.hero-left{flex:1}
.hero-title{font-size:42px;line-height:1.03;margin:0 0 18px;color:#fff}
.accent{background:linear-gradient(90deg,#06b6d4,#7c3aed);-webkit-background-clip:text;background-clip:text;color:transparent}
.lead{color:var(--muted);font-size:18px;margin-bottom:18px}
.hero-cta{display:flex;gap:12px;margin-bottom:10px}
.btn{display:inline-block;padding:10px 16px;border-radius:10px;text-decoration:none;font-weight:700;cursor:pointer}
.btn-primary{background:linear-gradient(90deg,var(--accent),#06b6d4);color:#041027;box-shadow:0 8px 30px rgba(124,58,237,0.18)}
.btn-ghost{background:transparent;border:1px solid rgba(255,255,255,0.06);color:#eaf6ff}
.micro{color:var(--muted);font-size:13px}

/* hero-right visual */
.card-visual{width:420px;height:300px;border-radius:18px;overflow:hidden;background:linear-gradient(180deg,rgba(255,255,255,0.02),rgba(255,255,255,0.01));box-shadow:0 12px 40px rgba(2,6,23,0.5);display:flex;align-items:center;justify-content:center}
.card-visual img{width:100%;height:100%;object-fit:cover;display:block;}

/* SECTIONS */
.section{padding:80px 0}
.section.alt{background:linear-gradient(180deg,rgba(255,255,255,0.01),rgba(255,255,255,0.0))}
.section-title{text-align:center;font-size:28px;margin-bottom:24px;color:#f3f9ff}

/* cards grid */
.cards-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:20px}
.course-card{background:linear-gradient(180deg,#071226,#081b2a);padding:18px;border-radius:14px;box-shadow:0 10px 30px rgba(2,6,23,0.6);transition:transform .28s,box-shadow .28s;overflow:hidden}
.course-card img{width:100%;height:160px;object-fit:cover;border-radius:10px;margin-bottom:12px}
.course-card h3{margin:0 0 8px;color:#fff}
.course-card p{color:var(--muted);margin-bottom:12px}
.card-actions{display:flex;gap:8px}
.btn-sm{padding:8px 12px;border-radius:8px;font-weight:700}
.btn-sm.ghost{background:transparent;border:1px solid rgba(255,255,255,0.04);color:#eaf6ff}

/* lessons */
.lessons-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:14px}
.lesson{background:linear-gradient(180deg,#061826,#071526);padding:18px;border-radius:12px;color:var(--muted);box-shadow:0 8px 25px rgba(2,6,23,0.6)}

/* gallery */
.gallery-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:12px}
.gallery-item{width:100%;display:block;border-radius:12px;object-fit:cover;transition:transform .28s,box-shadow .28s;cursor:pointer}
.gallery-item:hover{transform:scale(1.03);box-shadow:0 18px 40px rgba(2,6,23,0.6)}

/* contact */
.contact-grid{display:grid;grid-template-columns:1fr 320px;gap:24px;align-items:start}
form{display:flex;flex-direction:column;gap:12px}
input,textarea{padding:12px;border-radius:8px;border:1px solid rgba(255,255,255,0.04);background:transparent;color:#eaf6ff}
textarea{min-height:120px}
.contact-info{background:linear-gradient(180deg,#051022,#081826);padding:18px;border-radius:12px;color:var(--muted)}

/* footer */
.site-footer{padding:18px 0;text-align:center;color:var(--muted);font-size:14px}

/* modal + lightbox */
.modal{position:fixed;inset:0;display:none;align-items:center;justify-content:center;background:rgba(2,6,23,0.6);z-index:200}
.modal.open{display:flex}
.modal-panel{background:linear-gradient(180deg,#071226,#0b2233);padding:20px;border-radius:12px;min-width:320px;color:#eaf6ff}
.modal-close{position:absolute;right:18px;top:18px;background:transparent;border:none;color:#fff;font-size:22px}

/* lightbox */
.lightbox{position:fixed;inset:0;display:none;align-items:center;justify-content:center;background:rgba(2,6,23,0.95);z-index:250}
.lightbox.open{display:flex}
.lightbox img{max-width:92%;max-height:86%;border-radius:10px;box-shadow:0 20px 60px rgba(2,6,23,0.6)}

/* responsive */
@media(max-width:900px){
  .hero-inner{flex-direction:column}
  .card-visual{width:320px;height:220px}
  .contact-grid{grid-template-columns:1fr}
  .header-actions .btn-outline{display:none}
  .hamburger{display:block}
  .nav-list{display:none}
  .mobile-menu{display:none}
}