:root{--primary:#1a73e8;--primary-dark:#1557b0;--secondary:#0d2137;--bg-light:#f8f9fa;--white:#fff;--text-dark:#1a1a2e;--text-body:#333;--text-muted:#6c757d;--border-color:#e9ecef;--success:#28a745;--whatsapp:#25d366;--shadow:0 2px 8px rgba(0,0,0,.06);--shadow-lg:0 8px 24px rgba(0,0,0,.1);--radius:10px;--radius-sm:6px;--max-width:1200px;--content-width:800px;--transition:all .25s ease}

*,*::before,*::after{box-sizing:border-box}
body{margin:0;font-family:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;background:var(--bg-light);color:var(--text-body);line-height:1.6}
a{color:var(--primary);text-decoration:none;transition:var(--transition)}
a:hover{color:var(--primary-dark)}
img{max-width:100%;height:auto}

/* Header */
.site-header{background:var(--white);border-bottom:3px solid var(--primary);position:sticky;top:0;z-index:100;box-shadow:0 1px 4px rgba(0,0,0,.06)}
.header-inner{max-width:var(--max-width);margin:0 auto;padding:0 24px;display:flex;align-items:center;justify-content:space-between;height:64px}
.site-logo{font-size:1.3rem;font-weight:800;color:var(--secondary);text-decoration:none;display:flex;align-items:center;gap:8px}
.site-logo span{color:var(--primary)}
.site-nav{display:flex;align-items:center;gap:28px}
.site-nav a{color:var(--text-dark);font-size:.9rem;font-weight:500;text-decoration:none;transition:var(--transition)}
.site-nav a:hover{color:var(--primary)}
.mobile-menu-btn{display:none;background:none;border:none;font-size:1.5rem;cursor:pointer;color:var(--text-dark)}

/* Breadcrumbs */
.breadcrumbs{max-width:var(--max-width);margin:0 auto;padding:16px 24px 0}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:6px;list-style:none;margin:0;padding:0;font-size:.85rem;color:var(--text-muted)}
.breadcrumb li+li::before{content:'/' ;margin-right:6px}
.breadcrumb a{color:var(--text-muted)}
.breadcrumb a:hover{color:var(--primary)}
.breadcrumb .current{color:var(--text-dark);font-weight:500}

/* Search Bar */
.search-container{max-width:var(--max-width);margin:24px auto;padding:0 24px}
.search-bar{display:flex;gap:0;max-width:500px}
.search-bar input{flex:1;padding:12px 16px;border:2px solid var(--border-color);border-radius:var(--radius-sm) 0 0 var(--radius-sm);font-size:.95rem;transition:var(--transition);background:var(--white)}
.search-bar input:focus{outline:none;border-color:var(--primary)}
.search-bar button{padding:12px 20px;background:var(--primary);color:var(--white);border:none;border-radius:0 var(--radius-sm) var(--radius-sm) 0;cursor:pointer;font-size:.95rem;transition:var(--transition)}
.search-bar button:hover{background:var(--primary-dark)}

/* Hero / Featured Article */
.hero{max-width:var(--max-width);margin:24px auto;padding:0 24px}
.featured-card{position:relative;border-radius:var(--radius);overflow:hidden;min-height:400px;display:flex;align-items:flex-end;background:var(--secondary)}
.featured-card img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.featured-overlay{position:absolute;inset:0;background:linear-gradient(to top,rgba(0,0,0,.8) 0%,transparent 60%)}
.featured-content{position:relative;z-index:1;padding:40px;color:var(--white);max-width:640px}
.featured-content .category-badge{display:inline-block;padding:4px 12px;background:var(--primary);color:var(--white);border-radius:20px;font-size:.75rem;font-weight:600;margin-bottom:12px;text-transform:uppercase}
.featured-content h2{margin:0 0 8px;font-size:2rem;line-height:1.3}
.featured-content p{margin:0 0 16px;opacity:.9;font-size:1rem;line-height:1.6}
.featured-meta{display:flex;align-items:center;gap:16px;font-size:.85rem;opacity:.8}

/* Article Cards Grid */
.articles-section{max-width:var(--max-width);margin:32px auto;padding:0 24px}
.section-title{font-size:1.4rem;font-weight:700;margin:0 0 20px;color:var(--text-dark)}
.articles-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(340px,1fr));gap:24px}
.article-card{background:var(--white);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden;transition:var(--transition);display:flex;flex-direction:column}
.article-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-4px)}
.article-card-image{position:relative;overflow:hidden;aspect-ratio:16/9}
.article-card-image img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease}
.article-card:hover .article-card-image img{transform:scale(1.05)}
.article-card-body{padding:20px;flex:1;display:flex;flex-direction:column}
.article-card-body .category{font-size:.75rem;color:var(--primary);font-weight:600;text-transform:uppercase;margin-bottom:6px}
.article-card-body h3{margin:0 0 8px;font-size:1.1rem;line-height:1.4}
.article-card-body h3 a{color:var(--text-dark);text-decoration:none}
.article-card-body h3 a:hover{color:var(--primary)}
.article-card-body p{margin:0 0 16px;font-size:.9rem;color:var(--text-muted);line-height:1.6;flex:1}
.article-card-footer{display:flex;align-items:center;justify-content:space-between;padding-top:12px;border-top:1px solid var(--border-color);font-size:.8rem;color:var(--text-muted)}
.article-card-footer .reading-time{display:flex;align-items:center;gap:4px}

/* Sidebar */
.content-layout{max-width:var(--max-width);margin:32px auto;padding:0 24px;display:grid;grid-template-columns:1fr 320px;gap:32px;align-items:start}
.sidebar-widget{background:var(--white);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow);margin-bottom:20px}
.sidebar-widget h3{margin:0 0 16px;font-size:1rem;font-weight:700;color:var(--text-dark);padding-bottom:10px;border-bottom:2px solid var(--primary)}
.sidebar-widget ul{list-style:none;padding:0;margin:0}
.sidebar-widget ul li{padding:8px 0;border-bottom:1px solid var(--border-color);display:flex;justify-content:space-between;align-items:center;font-size:.9rem}
.sidebar-widget ul li:last-child{border-bottom:none}
.sidebar-widget ul li a{color:var(--text-body);text-decoration:none}
.sidebar-widget ul li a:hover{color:var(--primary)}
.sidebar-widget ul li .count{background:var(--bg-light);padding:2px 10px;border-radius:12px;font-size:.8rem;color:var(--text-muted);font-weight:500}
.sidebar-widget .service-item{display:flex;align-items:center;gap:10px;padding:8px 0}
.sidebar-widget .service-item i{color:var(--primary);width:20px;text-align:center}

/* Article Page */
.article-page{max-width:var(--content-width);margin:0 auto;padding:24px}
.article-page .article-header{text-align:center;margin-bottom:32px}
.article-page .article-header h1{font-size:2.2rem;line-height:1.3;margin:0 0 12px;color:var(--text-dark)}
.article-page .article-meta{display:flex;align-items:center;justify-content:center;gap:20px;font-size:.85rem;color:var(--text-muted);flex-wrap:wrap}
.article-page .article-featured-image{border-radius:var(--radius);overflow:hidden;margin-bottom:32px}
.article-page .article-featured-image img{width:100%}
.article-page .article-content{font-size:1.05rem;line-height:1.8;color:var(--text-body)}
.article-page .article-content h2{margin:32px 0 16px;font-size:1.5rem;color:var(--text-dark)}
.article-page .article-content h3{margin:24px 0 12px;font-size:1.25rem;color:var(--text-dark)}
.article-page .article-content p{margin:0 0 20px}
.article-page .article-content ul,.article-page .article-content ol{margin:0 0 20px;padding-left:24px}
.article-page .article-content li{margin-bottom:8px}
.article-page .article-content blockquote{margin:24px 0;padding:16px 24px;border-left:4px solid var(--primary);background:rgba(26,115,232,.04);border-radius:0 var(--radius-sm) var(--radius-sm) 0;font-style:italic}
.article-page .article-content code{background:var(--bg-light);padding:2px 6px;border-radius:3px;font-size:.9em;color:#d63384}
.article-page .article-content pre{background:var(--secondary);color:var(--white);padding:20px;border-radius:var(--radius);overflow-x:auto;margin:0 0 20px}
.article-page .article-content pre code{background:none;color:inherit;padding:0}
.article-page .article-content img{border-radius:var(--radius-sm);margin:16px 0}
.article-page .article-content a{color:var(--primary);text-decoration:underline;text-underline-offset:2px}

/* Table of Contents */
.toc{position:sticky;top:80px;background:var(--white);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow);margin-bottom:24px}
.toc h4{margin:0 0 12px;font-size:.9rem;font-weight:700;display:flex;align-items:center;justify-content:space-between;cursor:pointer}
.toc h4::after{content:'\25B2';font-size:.6rem;transition:var(--transition)}
.toc.collapsed h4::after{content:'\25BC'}
.toc-list{list-style:none;padding:0;margin:0}
.toc.collapsed .toc-list{display:none}
.toc-list li{padding:4px 0}
.toc-list a{font-size:.85rem;color:var(--text-muted);text-decoration:none;transition:var(--transition);display:block;padding:2px 0 2px 12px;border-left:2px solid transparent}
.toc-list a:hover{color:var(--primary)}
.toc-list a.active{color:var(--primary);border-left-color:var(--primary);font-weight:600}
.toc-list .toc-h3{padding-left:24px}

/* Author Box */
.author-box{display:flex;gap:20px;padding:24px;background:var(--white);border-radius:var(--radius);box-shadow:var(--shadow);margin:32px 0}
.author-photo{width:80px;height:80px;border-radius:50%;object-fit:cover;flex-shrink:0}
.author-info h4{margin:0 0 4px;font-size:1.1rem}
.author-info .author-role{color:var(--text-muted);font-size:.85rem;margin-bottom:8px}
.author-info p{margin:0 0 12px;font-size:.9rem;color:var(--text-body);line-height:1.6}
.author-social{display:flex;gap:10px}
.author-social a{width:32px;height:32px;border-radius:50%;background:var(--bg-light);display:flex;align-items:center;justify-content:center;color:var(--text-muted);font-size:.9rem;transition:var(--transition)}
.author-social a:hover{background:var(--primary);color:var(--white)}

/* FAQ Accordion */
.faq-section{margin:40px 0}
.faq-section h2{margin:0 0 20px;font-size:1.4rem}
.faq-item{background:var(--white);border-radius:var(--radius-sm);margin-bottom:8px;box-shadow:var(--shadow);overflow:hidden}
.faq-item .faq-question{padding:16px 20px;cursor:pointer;font-weight:600;display:flex;align-items:center;justify-content:space-between;transition:var(--transition)}
.faq-item .faq-question::after{content:'+';font-size:1.3rem;color:var(--primary);transition:var(--transition)}
.faq-item.open .faq-question::after{content:'\2212'}
.faq-item .faq-answer{padding:0 20px;max-height:0;overflow:hidden;transition:max-height .3s ease,padding .3s ease;font-size:.95rem;line-height:1.7;color:var(--text-body)}
.faq-item.open .faq-answer{padding:0 20px 16px;max-height:500px}

/* Newsletter CTA */
.newsletter-cta{background:linear-gradient(135deg,var(--primary) 0%,var(--primary-dark) 100%);border-radius:var(--radius);padding:48px;text-align:center;color:var(--white);margin:40px 0}
.newsletter-cta h2{margin:0 0 8px;font-size:1.6rem}
.newsletter-cta p{margin:0 0 24px;opacity:.9;font-size:1rem}
.newsletter-form{display:flex;gap:0;max-width:460px;margin:0 auto}
.newsletter-form input{flex:1;padding:14px 18px;border:none;border-radius:var(--radius-sm) 0 0 var(--radius-sm);font-size:.95rem}
.newsletter-form button{padding:14px 28px;background:var(--secondary);color:var(--white);border:none;border-radius:0 var(--radius-sm) var(--radius-sm) 0;font-weight:600;cursor:pointer;transition:var(--transition);white-space:nowrap}
.newsletter-form button:hover{background:#162d44}

/* Contact CTA */
.contact-cta{background:var(--white);border-radius:var(--radius);padding:48px;text-align:center;box-shadow:var(--shadow);margin:40px 0}
.contact-cta h2{margin:0 0 8px}
.contact-cta p{margin:0 0 20px;color:var(--text-muted)}

/* Social Sharing */
.social-share{display:flex;gap:10px;margin:24px 0;flex-wrap:wrap}
.social-share a{width:40px;height:40px;border-radius:50%;display:flex;align-items:center;justify-content:center;color:var(--white);font-size:1rem;transition:var(--transition);text-decoration:none}
.social-share a:hover{transform:scale(1.1);color:var(--white)}
.share-facebook{background:#1877f2}
.share-twitter{background:#000}
.share-linkedin{background:#0a66c2}
.share-whatsapp{background:var(--whatsapp)}
.share-email{background:var(--text-muted)}

/* Reading Progress */
.reading-progress{position:fixed;top:64px;left:0;width:0;height:3px;background:var(--primary);z-index:99;transition:width .1s linear}

/* Footer */
.site-footer{background:var(--secondary);color:rgba(255,255,255,.8);padding:48px 24px 24px;margin-top:48px}
.footer-inner{max-width:var(--max-width);margin:0 auto;display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px}
.footer-section h4{color:var(--white);margin:0 0 16px;font-size:1rem}
.footer-section p{font-size:.9rem;line-height:1.7;margin:0 0 12px}
.footer-section ul{list-style:none;padding:0;margin:0}
.footer-section ul li{margin-bottom:8px}
.footer-section ul li a{color:rgba(255,255,255,.7);font-size:.9rem;text-decoration:none;transition:var(--transition)}
.footer-section ul li a:hover{color:var(--white)}
.footer-social{display:flex;gap:10px;margin-top:16px}
.footer-social a{width:36px;height:36px;border-radius:50%;background:rgba(255,255,255,.1);display:flex;align-items:center;justify-content:center;color:var(--white);font-size:.9rem;transition:var(--transition)}
.footer-social a:hover{background:var(--primary)}
.footer-bottom{max-width:var(--max-width);margin:32px auto 0;padding-top:20px;border-top:1px solid rgba(255,255,255,.1);text-align:center;font-size:.8rem;color:rgba(255,255,255,.5)}
.footer-whatsapp{display:inline-flex;align-items:center;gap:8px;background:var(--whatsapp);color:var(--white);padding:10px 20px;border-radius:24px;font-weight:600;font-size:.9rem;text-decoration:none;margin-top:12px;transition:var(--transition)}
.footer-whatsapp:hover{background:#1eba5e;color:var(--white);transform:scale(1.03)}

/* WhatsApp Floating Button */
.whatsapp-float{position:fixed;bottom:24px;right:24px;width:56px;height:56px;background:var(--whatsapp);border-radius:50%;display:flex;align-items:center;justify-content:center;color:var(--white);font-size:1.6rem;box-shadow:0 4px 12px rgba(37,211,102,.4);z-index:90;transition:var(--transition);text-decoration:none}
.whatsapp-float:hover{transform:scale(1.1);color:var(--white);box-shadow:0 6px 16px rgba(37,211,102,.5)}

/* Scroll to Top */
.scroll-top{position:fixed;bottom:24px;right:92px;width:44px;height:44px;border-radius:50%;background:var(--primary);color:var(--white);border:none;cursor:pointer;display:flex;align-items:center;justify-content:center;font-size:1.1rem;box-shadow:0 2px 8px rgba(26,115,232,.4);z-index:90;opacity:0;visibility:hidden;transition:var(--transition)}
.scroll-top.visible{opacity:1;visibility:visible}
.scroll-top:hover{background:var(--primary-dark);transform:translateY(-2px)}

/* Tags */
.tag-list{display:flex;flex-wrap:wrap;gap:8px}
.tag{display:inline-block;padding:4px 14px;background:var(--bg-light);border-radius:20px;font-size:.8rem;color:var(--text-muted);text-decoration:none;transition:var(--transition)}
.tag:hover{background:var(--primary);color:var(--white)}

/* Responsive */
@media(max-width:991px){
  .content-layout{grid-template-columns:1fr}
  .sidebar-widget{order:2}
  .footer-inner{grid-template-columns:1fr 1fr}
}

@media(max-width:767px){
  .header-inner{height:56px}
  .site-nav{display:none;position:absolute;top:56px;left:0;right:0;background:var(--white);flex-direction:column;padding:16px 24px;box-shadow:var(--shadow-lg);gap:0}
  .site-nav.open{display:flex}
  .site-nav a{padding:12px 0;border-bottom:1px solid var(--border-color)}
  .mobile-menu-btn{display:block}
  .articles-grid{grid-template-columns:1fr}
  .featured-card{min-height:280px}
  .featured-content h2{font-size:1.4rem}
  .featured-content{padding:24px}
  .article-page .article-header h1{font-size:1.6rem}
  .newsletter-cta{padding:32px 20px}
  .newsletter-form{flex-direction:column}
  .newsletter-form input,.newsletter-form button{border-radius:var(--radius-sm)}
  .footer-inner{grid-template-columns:1fr;gap:24px}
  .author-box{flex-direction:column;align-items:center;text-align:center}
  .social-share{justify-content:center}
  .content-layout{padding:0 16px}
}

/* Print */
@media print{
  .site-header,.site-footer,.whatsapp-float,.scroll-top,.social-share,.sidebar-widget,.newsletter-cta,.reading-progress{display:none!important}
  .article-page{max-width:100%;padding:0}
  body{background:var(--white)}
}