:root{--primary:#2563eb;--primary-dark:#1d4ed8;--text:#1f2937;--text-light:#6b7280;--bg:#ffffff;--bg-alt:#f9fafb;--border:#e5e7eb;--shadow:0 1px 3px 0 rgba(0,0,0,0.1),0 1px 2px 0 rgba(0,0,0,0.06)}@media (prefers-color-scheme:dark){:root{--text:#f9fafb;--text-light:#9ca3af;--bg:#111827;--bg-alt:#1f2937;--border:#374151;--shadow:0 1px 3px 0 rgba(0,0,0,0.3),0 1px 2px 0 rgba(0,0,0,0.2)}}*,*::before,*::after{box-sizing:border-box}body,h1,h2,h3,h4,p,ul,ol,li,figure{margin:0;padding:0}body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;line-height:1.6;color:var(--text);background:var(--bg);font-size:16px}h1,h2,h3,h4{line-height:1.2;font-weight:600;color:var(--text)}h1{font-size:2rem;margin-bottom:1rem}h2{font-size:1.5rem;margin:2rem 0 1rem}h3{font-size:1.25rem;margin:1.5rem 0 0.75rem}h4{font-size:1.125rem;margin:1rem 0 0.5rem}p{margin-bottom:1rem;max-width:70ch}ul,ol{margin-bottom:1rem;padding-left:1.5rem}li{margin-bottom:0.25rem}a{color:var(--primary);text-decoration:none;transition:color 0.2s}a:hover{color:var(--primary-dark);text-decoration:underline}a:focus{outline:2px solid var(--primary);outline-offset:2px}.container{max-width:1200px;margin:0 auto;padding:0 1rem}.header{background:var(--bg);border-bottom:1px solid var(--border);padding:1rem 0;position:sticky;top:0;z-index:100}.header-content{display:flex;align-items:center;justify-content:space-between;gap:1rem}.logo{display:flex;align-items:center;gap:0.5rem;font-size:1.25rem;font-weight:700;color:var(--text)}.logo svg{width:32px;height:32px}.search-box{flex:1;max-width:400px;position:relative}.search-input{width:100%;padding:0.75rem;border:1px solid var(--border);border-radius:8px;font-size:1rem;background:var(--bg)}.search-results{position:absolute;top:100%;left:0;right:0;background:var(--bg);border:1px solid var(--border);border-radius:8px;max-height:300px;overflow-y:auto;display:none;box-shadow:var(--shadow)}.search-result{padding:0.75rem;border-bottom:1px solid var(--border);cursor:pointer}.search-result:hover{background:var(--bg-alt)}.nav{display:flex;gap:1.5rem}.nav a{font-weight:500}.main{flex:1;padding:2rem 0}.breadcrumbs{margin-bottom:1.5rem;font-size:0.875rem;color:var(--text-light)}.featured-answer{background:var(--bg-alt);border-left:4px solid var(--primary);padding:1.5rem;margin:2rem 0;border-radius:0 8px 8px 0}.featured-answer h2{margin-top:0;color:var(--primary)}.key-takeaways{background:var(--bg-alt);padding:1.5rem;border-radius:8px;margin:2rem 0}.key-takeaways h3{margin-top:0}.key-takeaways ul{margin-bottom:0}.toc{position:sticky;top:120px;background:var(--bg);border:1px solid var(--border);border-radius:8px;padding:1rem;margin:0 0 2rem 2rem;max-width:250px;font-size:0.875rem}.toc h4{margin-top:0;font-size:1rem}.toc ul{list-style:none;padding-left:0}.toc a{display:block;padding:0.25rem 0;color:var(--text-light)}.toc a.active{color:var(--primary);font-weight:600}.faq{margin:2rem 0}.faq details{border:1px solid var(--border);border-radius:8px;margin-bottom:0.5rem}.faq summary{padding:1rem;font-weight:600;cursor:pointer;background:var(--bg-alt)}.faq summary:hover{background:var(--border)}.faq p{padding:1rem;margin:0}.related{background:var(--bg-alt);padding:1.5rem;border-radius:8px;margin:2rem 0}.related h3{margin-top:0}.related ul{list-style:none;padding-left:0}.related a{display:block;padding:0.5rem 0;font-weight:500}.affiliate-panel{border:2px dashed var(--border);padding:1.5rem;margin:2rem 0;text-align:center;border-radius:8px}.affiliate-panel h3{margin-top:0}.affiliate-links{display:flex;gap:1rem;justify-content:center;flex-wrap:wrap;margin-top:1rem}.affiliate-links a{background:var(--primary);color:white;padding:0.75rem 1.5rem;border-radius:8px;font-weight:600;transition:background 0.2s}.affiliate-links a:hover{background:var(--primary-dark);text-decoration:none}.ad-banner{margin:2rem 0;text-align:center}.ad-banner img{max-width:100%;height:auto;border-radius:8px}.footer{background:var(--bg-alt);border-top:1px solid var(--border);padding:2rem 0;text-align:center}.footer-content{display:flex;flex-direction:column;gap:1rem;align-items:center}.footer-nav{display:flex;gap:1.5rem;flex-wrap:wrap;justify-content:center}.footer p{font-size:0.875rem;color:var(--text-light);max-width:none}.categories-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:1.5rem;margin:2rem 0}.category-card{background:var(--bg-alt);padding:1.5rem;border-radius:8px;border:1px solid var(--border);transition:transform 0.2s,box-shadow 0.2s}.category-card:hover{transform:translateY(-2px);box-shadow:var(--shadow)}.category-card h3{margin-top:0}.category-list{list-style:none;padding-left:0}.category-list a{display:block;padding:0.25rem 0;color:var(--text-light)}.category-list a:hover{color:var(--primary)}.newsletter{background:var(--primary);color:white;padding:2rem;border-radius:8px;margin:2rem 0;text-align:center}.newsletter h3{margin-top:0;color:white}.newsletter p{color:rgba(255,255,255,0.9)}.newsletter-form{display:flex;gap:1rem;max-width:400px;margin:1rem auto 0;flex-wrap:wrap}.newsletter-input{flex:1;padding:0.75rem;border:none;border-radius:8px;font-size:1rem;min-width:200px}.newsletter-btn{background:white;color:var(--primary);padding:0.75rem 1.5rem;border:none;border-radius:8px;font-weight:600;cursor:pointer;transition:transform 0.2s}.newsletter-btn:hover{transform:translateY(-1px)}@media (max-width:768px){.header-content{flex-direction:column;gap:0.5rem}.search-box{order:-1;max-width:none}.nav{order:1}.toc{position:static;margin:0 0 2rem;max-width:none}.affiliate-links{flex-direction:column;align-items:center}.newsletter-form{flex-direction:column;align-items:center}.categories-grid{grid-template-columns:1fr}}@media (min-width:769px){.main{display:grid;grid-template-columns:1fr 250px;gap:2rem;align-items:start}.article-content{min-width:0}.toc{margin:0}}