:root{color:#0f172a;text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background-color:#f8fafc;font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;font-weight:400;line-height:1.5}*{box-sizing:border-box}body{color:#0f172a;background:#f8fafc;margin:0}a{color:inherit;text-decoration:none}.app-shell{min-height:100vh;position:relative;overflow-x:hidden}.page-shell{z-index:1;max-width:1100px;margin:0 auto;padding:24px 20px 80px;position:relative}.bg-spot{filter:blur(120px);opacity:.4;z-index:0;border-radius:999px;width:480px;height:480px;position:absolute}.bg-spot-a{background:#a5b4fc;top:-160px;right:-120px}.bg-spot-b{background:#7dd3fc;bottom:-200px;left:-120px}.nav{z-index:5;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);background:#f8fafccc;border-bottom:1px solid #e2e8f0;position:sticky;top:0}.nav-inner{justify-content:space-between;align-items:center;max-width:1100px;margin:0 auto;padding:12px 20px;display:flex}.nav-links{gap:14px;display:flex}.nav a{color:#0f172a;font-weight:600}.nav a.active{color:#2563eb}.nav-cta{align-items:center;gap:8px;display:flex}.brand{letter-spacing:-.02em;font-size:18px;font-weight:800}.footer{color:#e2e8f0;background:#0f172a;padding:32px 0}.footer-content{justify-content:space-between;align-items:center;display:flex}.footer a{color:#cbd5e1;font-weight:600}.footer-links{gap:16px;display:flex}.hero{grid-template-columns:repeat(auto-fit,minmax(280px,1fr));align-items:center;gap:24px;padding-top:12px;display:grid}.hero-content h1{margin:8px 0 4px;font-size:clamp(36px,6vw,48px)}.lead{margin:0 0 12px;font-size:18px}.hero-card{background:#fff;border-radius:18px;padding:20px;box-shadow:0 20px 60px #0f172a14}.hero-list{margin:12px 0;padding-left:18px;line-height:1.6}.highlight{color:#312e81;background:#eef2ff;border-radius:12px;padding:12px;font-weight:600}.stack{flex-direction:column;gap:16px;display:flex}.stack.md{gap:20px}.stack.lg{gap:28px}.stack.sm{gap:12px}.row{align-items:center;display:flex}.row.space{justify-content:space-between}.row.gap{gap:12px}.row.gap-sm{gap:8px}.card{background:#fff;border:1px solid #e2e8f0;border-radius:16px;padding:18px;box-shadow:0 12px 36px #0f172a0f}.uni-card{text-align:left;cursor:pointer;border:1px solid #e2e8f0;transition:transform .15s,box-shadow .15s}.uni-card:hover{transform:translateY(-4px);box-shadow:0 16px 40px #2563eb1f}.course-card{flex-direction:column;gap:12px;display:flex}.metric{text-align:left}.placeholder{text-align:left;background:linear-gradient(135deg,#eff6ff,#f8fafc);border:1px dashed #cbd5e1}.grid{grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:16px;display:grid}.pill{color:#0369a1;letter-spacing:.3px;background:#e0f2fe;border-radius:999px;align-items:center;gap:6px;padding:6px 10px;font-size:12px;font-weight:700;display:inline-flex}.pill.soft{color:#0f172a;background:#f1f5f9}.tag{color:#334155;background:#f8fafc;border:1px solid #e2e8f0;border-radius:999px;padding:6px 10px;font-size:12px;font-weight:600;display:inline-flex}.tag.tone{color:#4338ca;background:#eef2ff;border-color:#c7d2fe}.price{letter-spacing:-.01em;font-weight:800}.btn{cursor:pointer;color:#0f172a;background:#fff;border:1px solid #0000;border-radius:12px;padding:10px 14px;font-size:14px;font-weight:700}.btn.primary{color:#fff;background:#2563eb}.btn.ghost{color:#0f172a;background:#fff;border:1px solid #e2e8f0}.btn:hover{opacity:.92}.section-head{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;display:flex}.muted{color:#475569;margin:4px 0}.metric-value{font-weight:800;display:block}.metric-label{color:#475569}.metrics{grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:12px;margin-top:16px;display:grid}.badge{color:#3730a3;background:#e0e7ff;border-radius:10px;padding:6px 10px;font-weight:700;display:inline-flex}.marquee{position:relative;overflow:hidden}.marquee-track{gap:12px;animation:18s linear infinite marquee;display:flex}.review-card{min-width:260px}@keyframes marquee{0%{transform:translate(0)}to{transform:translate(-50%)}}.auth{place-items:center;min-height:70vh;display:grid}.auth-card{width:100%;max-width:420px}.field{flex-direction:column;gap:6px;font-weight:600;display:flex}.field input{background:#f8fafc;border:1px solid #e2e8f0;border-radius:12px;padding:12px}.field input:focus{border-color:#2563eb;outline:2px solid #bfdbfe}.auth-foot{margin:6px 0 0}.link{color:#2563eb;font-weight:700;text-decoration:none}.profile-card{flex-direction:column;gap:12px;display:flex}.profile-grid{grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:12px;display:grid}.cart-row{border-bottom:1px solid #e2e8f0;justify-content:space-between;align-items:center;padding:10px 0;display:flex}.cart-title{margin:0;font-weight:700}.cart-total{justify-content:space-between;padding:10px 0;font-size:16px;display:flex}.lectures ul{margin:8px 0 0;padding-left:18px;line-height:1.6}@media (max-width:640px){.nav-links{display:none}.nav-inner{gap:10px}}