:root{--bg:#f8fafc;--card:#fff;--text:#0f172a;--muted:#64748b;--border:#e2e8f0;--accent:#2563eb;--accent-hover:#1d4ed8;--accent-light:#60a5fa;--shadow:0 4px 6px -1px rgba(0,0,0,.1),0 2px 4px -2px rgba(0,0,0,.1);--radius:12px;--focus:0 0 0 3px rgba(37,99,235,.2);--gradient:linear-gradient(135deg,var(--accent),var(--accent-light))}[data-theme=dark]{--bg:#0a0a0a;--card:#1a1a1a;--text:#fff;--muted:#a0a0a0;--border:#2a2a2a;--accent:#3b82f6;--accent-hover:#2563eb;--accent-light:#60a5fa;--shadow:0 4px 6px -1px rgba(0,0,0,.5),0 2px 4px -2px rgba(0,0,0,.5);--focus:0 0 0 3px rgba(59,130,246,.3);--gradient:linear-gradient(135deg,var(--accent),var(--accent-light))}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}@keyframes pulse{0%{transform:scale(1)}50%{transform:scale(1.05)}to{transform:scale(1)}}*{box-sizing:border-box}body,html{height:100%}body{margin:0;background:var(--bg);color:var(--text);font-family:system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,Cantarell,Noto Sans,Helvetica,Arial;line-height:1.5}a{color:inherit}.wrap{max-width:1000px;margin:0 auto;padding:0 16px}.nav{position:-webkit-sticky;position:sticky;top:0;z-index:10000;background:var(--card);padding:16px 24px;margin-bottom:40px;box-shadow:var(--shadow);border-bottom:1px solid var(--border)}.nav-inner{display:flex;align-items:center;justify-content:space-between;width:100%;box-sizing:border-box}.brand{font-weight:700;letter-spacing:.2px;text-decoration:none;font-size:1.5rem}.nav-links{display:flex;gap:8px;align-items:center;background:var(--bg);padding:6px;border-radius:30px;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);border:1px solid var(--border)}.nav-link{padding:10px 18px;text-decoration:none;font-weight:500;color:var(--muted);transition:all .2s ease;position:relative;border-radius:20px;box-shadow:0 0 0 rgba(37,99,235,0)}.nav-link:hover{color:var(--text);background:var(--border);transform:translateY(-2px);box-shadow:0 4px 12px rgba(37,99,235,.3)}.nav-link.primary{color:#fff;background:var(--gradient);padding:10px 22px;border-radius:20px;font-weight:600;box-shadow:0 2px 10px rgba(37,99,235,.3)}.nav-link.primary:hover{transform:translateY(-2px);box-shadow:0 4px 15px rgba(37,99,235,.4);background:linear-gradient(135deg,#1d4ed8,#3b82f6)}main{padding:20px 0 60px;max-width:1200px;margin:0 auto}h1,h2{line-height:1.2;margin:0}h1{font-size:28px}h2{font-size:22px}.muted{color:var(--muted)}.stack{display:grid;grid-gap:12px;gap:12px}.row{display:flex;gap:10px;flex-wrap:wrap}.btn{-webkit-appearance:none;-moz-appearance:none;appearance:none;border:none;cursor:pointer;background:var(--gradient);color:#fff;padding:12px 24px;border-radius:var(--radius);font-weight:600;transition:all .3s ease;text-align:center;display:inline-flex;align-items:center;justify-content:center;gap:8px}.btn:hover{transform:translateY(-2px);box-shadow:var(--shadow)}.btn.secondary{background:var(--card);color:var(--text);border:1px solid var(--border)}.btn.secondary:hover{background:var(--bg)}.input,.select{width:100%;border:2px solid var(--border);border-radius:var(--radius);padding:12px 16px;background:var(--card);color:var(--text);transition:all .2s ease;font-size:1rem}.input:focus,.select:focus{border-color:var(--accent);box-shadow:var(--focus)}.feature-card{transition:all .3s ease}.feature-card:hover{transform:translateY(-5px)}.feature-icon{transition:all .3s ease}.feature-card:hover .feature-icon{animation:pulse 1s ease-in-out}.btn:focus,.input:focus,.nav-link:focus{outline:none;box-shadow:var(--focus)}.section{border:1px solid var(--border);border-radius:12px;background:var(--card);padding:16px}code{background:var(--bg);border:1px solid var(--border);border-radius:8px;padding:2px 6px;color:var(--text)}ul{margin:6px 0 0 18px}footer{color:var(--muted);font-size:13px;text-align:center;padding:16px 0 28px}