.article-header{background:linear-gradient(135deg,var(--light-blue) 0%,var(--white) 100%);padding:160px 0 40px;text-align:center;position:relative}.article-header h1{font-size:2.5rem;font-weight:700;margin-bottom:1rem;background:linear-gradient(135deg,var(--primary-blue),var(--primary-blue-dark));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;max-width:900px;margin-left:auto;margin-right:auto}.article-meta{display:flex;justify-content:center;align-items:center;gap:2rem;margin-bottom:1rem;font-size:.9rem;color:var(--text-secondary);flex-wrap:wrap}.article-category{background:var(--light-blue);color:var(--primary-blue);padding:6px 16px;border-radius:20px;font-weight:500;font-size:.85rem}.series-badge{background:var(--primary-blue);color:#fff;padding:6px 16px;border-radius:20px;font-weight:500;font-size:.85rem}.article-excerpt{font-size:1.1rem;color:var(--text-secondary);max-width:700px;margin:0 auto;line-height:1.7}.article-content{padding:60px 0;background:var(--white)}.article-body{max-width:800px;margin:0 auto;font-size:1.1rem;line-height:1.8}.article-body h1,.article-body h2,.article-body h3,.article-body h4{color:var(--text-primary);margin:2rem 0 1rem;font-weight:600}.article-body h1{font-size:2.2rem;border-bottom:3px solid var(--light-blue);padding-bottom:.5rem}.article-body h2{font-size:1.8rem;margin-top:3rem}.article-body h3{font-size:1.4rem;margin-top:2.5rem}.article-body h4{font-size:1.2rem;margin-top:2rem}.article-body p{margin-bottom:1.5rem;color:var(--text-primary)}.article-body ul,.article-body ol{margin:1.5rem 0;padding-left:2rem}.article-body li{margin-bottom:.8rem;color:var(--text-primary)}.article-body code{background:var(--light-gray);padding:2px 6px;border-radius:4px;font-family:Monaco,Menlo,Ubuntu Mono,monospace;font-size:.9em;color:var(--primary-blue)}.article-body pre{background:var(--light-gray);padding:1.5rem;border-radius:8px;overflow-x:auto;margin:2rem 0;border-left:4px solid var(--primary-blue)}.article-body pre code{background:none;padding:0;color:var(--text-primary)}.article-body blockquote{border-left:4px solid var(--primary-blue);margin:2rem 0;padding:1rem 1.5rem;background:var(--light-blue-3);border-radius:0 8px 8px 0}.article-body strong{font-weight:600;color:var(--text-primary)}.article-body a{color:var(--primary-blue);text-decoration:underline;transition:color .3s ease}.article-body a:hover{color:var(--primary-blue-dark)}.article-navigation{background:var(--light-gray);padding:2rem 0;margin-top:3rem}.nav-container{max-width:800px;margin:0 auto;display:flex;justify-content:space-between;align-items:center;gap:2rem}.nav-button{background:var(--primary-blue);color:#fff;padding:12px 24px;border-radius:8px;text-decoration:none;font-weight:500;transition:all .3s ease;display:flex;align-items:center;gap:.5rem}.nav-button:hover{background:var(--primary-blue-dark);transform:translateY(-2px)}.nav-button.disabled{background:var(--medium-gray, #64748b);cursor:not-allowed;pointer-events:none}.back-to-blog{background:var(--light-blue);color:var(--primary-blue);padding:12px 24px;border-radius:8px;text-decoration:none;font-weight:500;transition:all .3s ease}.back-to-blog:hover{background:var(--light-blue-secondary, #c7d2fe);transform:translateY(-2px)}@media(max-width:768px){.article-header h1{font-size:2rem}.article-meta{flex-direction:column;gap:1rem}.article-body{font-size:1rem}.nav-container{flex-direction:column;text-align:center}}