.library-hero{position:relative;padding:6rem 2rem 4rem;background:linear-gradient(135deg,#0a0f1e,#0f172a 50%,#1a1f35);overflow:hidden}.library-hero:before{content:"";position:absolute;top:0;left:0;right:0;bottom:0;background:radial-gradient(circle at 20% 50%,rgba(0,255,136,.1) 0,transparent 50%),radial-gradient(circle at 80% 80%,rgba(0,212,255,.1) 0,transparent 50%);animation:pulse 8s ease-in-out infinite}@keyframes pulse{0%,to{opacity:.5}50%{opacity:1}}.library-hero-content{position:relative;z-index:1;max-width:1200px;margin:0 auto;text-align:center}.library-hero h1{font-size:4rem;font-weight:900;background:linear-gradient(135deg,#0f8,#00d4ff 50%,#0f8);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin-bottom:1.5rem;animation:gradient-shift 3s ease infinite;background-size:200% 200%}@keyframes gradient-shift{0%,to{background-position:0 50%}50%{background-position:100% 50%}}.library-hero p{font-size:1.5rem;color:#9ca3af;max-width:700px;margin:0 auto 3rem;line-height:1.6}.library-search{max-width:600px;margin:0 auto;position:relative}.library-search input{width:100%;padding:1.25rem 1.5rem 1.25rem 3.5rem;background:rgba(31,41,55,.8);border:2px solid rgba(0,255,136,.2);border-radius:1rem;color:#fff;font-size:1.125rem;transition:all .3s ease;backdrop-filter:blur(10px)}.library-search input:focus{outline:none;border-color:#0f8;box-shadow:0 0 30px rgba(0,255,136,.3)}.library-search svg{position:absolute;left:1.25rem;top:50%;transform:translateY(-50%);width:1.5rem;height:1.5rem;color:#0f8}.library-categories{display:flex;gap:1rem;justify-content:center;flex-wrap:wrap;margin:3rem 0;padding:0 2rem}.category-tag{padding:.75rem 1.5rem;background:rgba(31,41,55,.6);border:1px solid rgba(0,255,136,.3);border-radius:2rem;color:#9ca3af;font-weight:600;cursor:pointer;transition:all .3s ease;backdrop-filter:blur(10px)}.category-tag.active,.category-tag:hover{background:rgba(0,255,136,.2);border-color:#0f8;color:#0f8;transform:translateY(-2px);box-shadow:0 4px 20px rgba(0,255,136,.3)}.library-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(380px,1fr));gap:2rem;padding:2rem;max-width:1400px;margin:0 auto}.article-card{position:relative;background:linear-gradient(135deg,rgba(31,41,55,.8),rgba(17,24,39,.9));border:1px solid rgba(0,255,136,.2);border-radius:1.5rem;padding:2rem;cursor:pointer;transition:all .4s cubic-bezier(.4,0,.2,1);backdrop-filter:blur(10px);overflow:hidden}.article-card:before{content:"";position:absolute;top:0;left:0;right:0;bottom:0;background:linear-gradient(135deg,rgba(0,255,136,.1),rgba(0,212,255,.1));opacity:0;transition:opacity .4s ease}.article-card:hover{transform:translateY(-8px) scale(1.02);border-color:#0f8;box-shadow:0 20px 60px rgba(0,255,136,.3)}.article-card:hover:before{opacity:1}.article-card-content{position:relative;z-index:1}.article-icon{width:3.5rem;height:3.5rem;background:linear-gradient(135deg,#0f8,#00d4ff);border-radius:1rem;display:flex;align-items:center;justify-content:center;margin-bottom:1.5rem;box-shadow:0 4px 20px rgba(0,255,136,.4)}.article-icon svg{width:2rem;height:2rem;color:#000}.article-card h3{font-size:1.5rem;font-weight:700;color:#fff;margin-bottom:.75rem;line-height:1.3}.article-card p{color:#9ca3af;line-height:1.6;margin-bottom:1.5rem}.article-meta{display:flex;gap:1rem;flex-wrap:wrap;margin-top:1.5rem}.meta-badge{display:flex;align-items:center;gap:.5rem;padding:.5rem 1rem;background:rgba(0,255,136,.1);border:1px solid rgba(0,255,136,.3);border-radius:.5rem;font-size:.875rem;color:#0f8;font-weight:600}.meta-badge svg{width:1rem;height:1rem}.article-arrow{position:absolute;bottom:2rem;right:2rem;width:2.5rem;height:2.5rem;background:rgba(0,255,136,.2);border-radius:50%;display:flex;align-items:center;justify-content:center;transition:all .3s ease}.article-card:hover .article-arrow{background:#0f8;transform:translateX(4px)}.article-arrow svg{width:1.25rem;height:1.25rem;color:#0f8}.article-card:hover .article-arrow svg{color:#000}.difficulty-beginner{background:rgba(34,197,94,.2);border-color:rgba(34,197,94,.5);color:#22c55e}.difficulty-intermediate{background:rgba(251,191,36,.2);border-color:rgba(251,191,36,.5);color:#fbbf24}.difficulty-advanced{background:rgba(239,68,68,.2);border-color:rgba(239,68,68,.5);color:#ef4444}.loading-skeleton{background:linear-gradient(90deg,rgba(31,41,55,.8) 25%,rgba(55,65,81,.8) 50%,rgba(31,41,55,.8) 75%);background-size:200% 100%;animation:loading 1.5s ease-in-out infinite}@keyframes loading{0%{background-position:200% 0}to{background-position:-200% 0}}.fade-in{animation:fadeIn .6s ease-out forwards;opacity:0}@keyframes fadeIn{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.fade-in:first-child{animation-delay:.1s}.fade-in:nth-child(2){animation-delay:.2s}.fade-in:nth-child(3){animation-delay:.3s}.fade-in:nth-child(4){animation-delay:.4s}.fade-in:nth-child(5){animation-delay:.5s}.fade-in:nth-child(6){animation-delay:.6s}@media (max-width:768px){.library-hero h1{font-size:2.5rem}.library-hero p{font-size:1.125rem}.library-grid{grid-template-columns:1fr;padding:1rem}.library-categories{padding:0 1rem}}.scroll-to-top{position:fixed;bottom:2rem;right:2rem;width:3.5rem;height:3.5rem;background:linear-gradient(135deg,#0f8,#00d4ff);border-radius:50%;display:flex;align-items:center;justify-content:center;cursor:pointer;box-shadow:0 4px 20px rgba(0,255,136,.4);transition:all .3s ease;z-index:1000;opacity:0;visibility:hidden}.scroll-to-top.visible{opacity:1;visibility:visible}.scroll-to-top:hover{transform:translateY(-4px);box-shadow:0 8px 30px rgba(0,255,136,.6)}.scroll-to-top svg{width:1.5rem;height:1.5rem;color:#000}.article-card-image{width:100%;height:200px;overflow:hidden;border-radius:1rem 1rem 0 0;margin:-2rem -2rem 1.5rem;position:relative}.article-card-image img{width:100%;height:100%;-o-object-fit:cover;object-fit:cover;transition:transform .4s ease}.article-card:hover .article-card-image img{transform:scale(1.05)}.article-card-image:after{content:"";position:absolute;bottom:0;left:0;right:0;height:50%;background:linear-gradient(0deg,rgba(15,23,42,.9),transparent)}.new-badge{position:absolute;top:1rem;right:1rem;padding:.375rem .875rem;background:linear-gradient(135deg,#ff6b6b,#ee5a6f);color:#fff;font-size:.75rem;font-weight:700;border-radius:1rem;text-transform:uppercase;letter-spacing:.05em;box-shadow:0 4px 12px hsla(0,100%,71%,.5);animation:badge-pulse 2s ease-in-out infinite;z-index:10}@keyframes badge-pulse{0%,to{transform:scale(1);box-shadow:0 4px 12px hsla(0,100%,71%,.5)}50%{transform:scale(1.05);box-shadow:0 6px 16px hsla(0,100%,71%,.7)}}.article-card.unread{opacity:1;border-color:rgba(0,255,136,.4);box-shadow:0 8px 32px rgba(0,255,136,.2),0 0 60px rgba(0,255,136,.15);animation:fadeIn .6s ease-out forwards,pulse-glow 3s ease-in-out infinite;animation-delay:var(--animation-delay,0s),.6s}.article-card.unread:hover{box-shadow:0 20px 60px rgba(0,255,136,.4),0 0 80px rgba(0,255,136,.25)}@keyframes pulse-glow{0%,to{box-shadow:0 8px 32px rgba(0,255,136,.2),0 0 60px rgba(0,255,136,.15)}50%{box-shadow:0 8px 32px rgba(0,255,136,.3),0 0 80px rgba(0,255,136,.25)}}.article-card.read{opacity:.7;border-color:rgba(0,255,136,.1);box-shadow:0 4px 16px rgba(0,0,0,.3)}.article-card.read:hover{opacity:.9;box-shadow:0 12px 40px rgba(0,255,136,.2)}.article-card.read .article-icon{opacity:.6}.article-card.read h3{color:#9ca3af}