*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{--bg: #ffffff;--bg-card: #f8f9fa;--bg-card-hover: #f1f3f5;--border: #e9ecef;--text: #212529;--text-muted: #495057;--text-dim: #868e96;--accent: #228be6;--success: #2b8a3e;--font: "Inter", system-ui, sans-serif;--mono: "JetBrains Mono", monospace;--radius: 8px;--radius-sm: 4px}html{scroll-behavior:smooth}body{font-family:var(--font);background:var(--bg);color:var(--text);line-height:1.7;-webkit-font-smoothing:antialiased;overflow-x:hidden}a{color:var(--accent);text-decoration:none;transition:color .2s}a:hover{color:#1864ab}.container{max-width:1100px;margin:0 auto;padding:0 24px}.nav{position:fixed;top:0;left:0;right:0;z-index:100;background:#fffffff2;border-bottom:1px solid var(--border)}.nav-inner{max-width:1100px;margin:0 auto;padding:0 24px;display:flex;align-items:center;justify-content:space-between;height:64px}.nav-logo{font-weight:700;font-size:1.1rem;letter-spacing:-.02em;color:var(--text)}.nav-logo span{color:var(--accent);font-weight:500}.nav-links{display:flex;align-items:center;gap:28px;list-style:none}.nav-links a{color:var(--text-muted);font-size:.88rem;font-weight:500;transition:color .2s}.nav-links a:hover{color:var(--text)}.nav-links a.btn-primary,.nav-links a.btn-primary:hover{color:#fff}.hero{padding:140px 0 80px;text-align:center;position:relative}.hero-badge{display:inline-flex;align-items:center;gap:8px;background:#e7f5ff;border:1px solid #a5d8ff;padding:4px 12px;border-radius:4px;font-size:.82rem;color:#1864ab;font-weight:500;margin-bottom:24px}.hero h1{font-size:clamp(2rem,5vw,3.5rem);font-weight:800;letter-spacing:-.02em;line-height:1.2;margin-bottom:20px;color:var(--text)}.hero p{font-size:1.1rem;color:var(--text-muted);max-width:650px;margin:0 auto 36px;line-height:1.7}.hero-cta{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 24px;border-radius:var(--radius-sm);font-weight:500;font-size:.92rem;border:none;cursor:pointer;transition:all .2s}.btn-primary{background:var(--accent);color:#fff}.btn-primary:hover{background:#1c7ed6;color:#fff}.btn-outline{background:transparent;border:1px solid var(--border);color:var(--text-muted)}.btn-outline:hover{border-color:var(--text-dim);color:var(--text)}.section{padding:60px 0;border-top:1px solid var(--border)}.section-label{font-size:.78rem;font-weight:600;text-transform:uppercase;letter-spacing:.05em;color:var(--text-dim);margin-bottom:8px}.section-title{font-size:clamp(1.4rem,2.5vw,1.8rem);font-weight:700;letter-spacing:-.01em;margin-bottom:12px}.section-desc{color:var(--text-muted);max-width:600px;margin-bottom:40px}.cred-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:16px}.cred-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:24px;transition:all .2s}.cred-card:hover{border-color:#ced4da;background:var(--bg-card-hover)}.cred-icon{font-size:1.5rem;margin-bottom:12px}.cred-card h3{font-size:1rem;font-weight:600;margin-bottom:6px}.cred-card p{font-size:.88rem;color:var(--text-muted);line-height:1.6}.talks-list{display:flex;flex-direction:column;gap:8px}.talk-item{display:flex;align-items:center;gap:16px;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-sm);padding:16px 20px;transition:all .2s}.talk-item:hover{border-color:#ced4da;background:var(--bg-card-hover)}.talk-icon{font-size:1.2rem;flex-shrink:0}.talk-info h4{font-size:.92rem;font-weight:600;margin-bottom:2px;color:var(--text)}.talk-info p{font-size:.8rem;color:var(--text-muted)}.subjects-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:16px}.subject-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:24px;transition:all .2s}.subject-card:hover{border-color:#ced4da}.subject-emoji{font-size:1.8rem;margin-bottom:12px}.subject-card h3{font-size:1.1rem;font-weight:600;margin-bottom:6px}.subject-card p{font-size:.88rem;color:var(--text-muted);margin-bottom:16px}.subject-topics{display:flex;flex-direction:column;gap:8px}.topic-tag{font-size:.85rem;padding:6px 10px;border-radius:var(--radius-sm);background:#fff;border:1px solid var(--border);color:var(--text);font-weight:500;display:flex;flex-direction:column}.topic-tag span.code{font-family:var(--mono);font-size:.75rem;color:var(--accent);margin-bottom:2px}.pricing-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:20px}.price-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:32px 28px;position:relative;transition:all .2s}.price-card.featured{border-color:var(--accent);background:#f8fbff}.price-card.featured:before{content:"Most Popular";position:absolute;top:-12px;left:50%;transform:translate(-50%);background:var(--accent);color:#fff;padding:4px 12px;border-radius:4px;font-size:.72rem;font-weight:600}.price-label{font-size:.88rem;color:var(--text-muted);font-weight:600;margin-bottom:8px}.price-amount{font-size:2.2rem;font-weight:700;letter-spacing:-.02em;margin-bottom:4px}.price-amount span{font-size:.9rem;font-weight:500;color:var(--text-muted)}.price-sub{font-size:.82rem;color:var(--text-dim);margin-bottom:24px}.price-features{list-style:none;display:flex;flex-direction:column;gap:10px;margin-bottom:28px}.price-features li{font-size:.88rem;color:var(--text-muted);display:flex;align-items:center;gap:10px}.price-features li:before{content:"✓";color:var(--success);font-weight:700;font-size:.9rem}.orgs-flex{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}.org-tag{padding:6px 12px;border-radius:var(--radius-sm);background:var(--bg-card);border:1px solid var(--border);font-size:.82rem;color:var(--text-muted);font-weight:500}.cta-block{text-align:center;padding:60px 24px;border-radius:var(--radius);background:var(--bg-card);border:1px solid var(--border)}.cta-block h2{font-size:1.6rem;font-weight:700;margin-bottom:12px}.cta-block p{color:var(--text-muted);margin-bottom:24px;max-width:480px;margin-inline:auto}.footer{border-top:1px solid var(--border);padding:32px 0;text-align:center;color:var(--text-dim);font-size:.82rem}.footer-links{display:flex;gap:24px;justify-content:center;margin-bottom:16px}.footer-links a{color:var(--text-muted);font-size:.82rem}.nav-toggle{display:none;background:none;border:none;color:var(--text);font-size:1.4rem;cursor:pointer}@media(max-width:768px){.nav-toggle{display:block}.nav-links{display:none;flex-direction:column;position:absolute;top:64px;left:0;right:0;background:#fffffffa;padding:16px 24px;gap:16px;border-bottom:1px solid var(--border)}.nav-links.open{display:flex}.hero{padding:110px 0 60px}}