.content-card{background:rgba(30,30,36,.38);backdrop-filter:blur(10px) saturate(140%);-webkit-backdrop-filter:blur(10px) saturate(140%);border:1.5px solid rgba(255,255,255,.1);border-radius:var(--border-radius);box-shadow:0 4px 15px rgba(0,0,0,.13);transition:transform var(--transition-speed),box-shadow .2s,border-color .2s,background .2s;padding:0;overflow:hidden;display:flex;flex-direction:column}.content-card:hover{transform:translateY(-4px) scale(1.025);background:rgba(30,30,36,.48);border-color:#ff6a00;box-shadow:0 8px 24px 0 rgba(255,106,0,.1)}.card-image-container{position:relative}.card-image{width:100%;height:180px;object-fit:cover;display:block}.card-category-tag{position:absolute;top:1rem;right:1rem;background-color:rgba(0,0,0,.5);backdrop-filter:blur(5px);padding:.25rem .75rem;border-radius:var(--border-radius);font-size:.875rem;color:var(--text-primary)}.card-info{padding:1.5rem;display:flex;flex-direction:column;flex-grow:1}.card-title{margin:0 0 .5rem;font-size:1.25rem;font-weight:500;line-height:1.4;color:var(--text-primary)}.card-source{color:var(--text-secondary);margin:0 0 1.5rem;flex-grow:1}.card-meta{justify-content:space-between;color:var(--text-secondary);font-size:.875rem}.card-meta,.card-meta-time{display:flex;align-items:center}.card-meta-time{gap:.5rem}.read-button{display:inline-flex;align-items:center;justify-content:center;padding:.75rem 1.5rem;border-radius:var(--border-radius);font-weight:500;border:none;cursor:pointer;transition:background-color var(--transition-speed),filter var(--transition-speed);font-family:var(--font-main);background-color:var(--accent-primary);color:var(--text-primary);filter:brightness(.8)}.read-button:hover{background-color:var(--accent-hover);filter:brightness(.9)}.read-button-link{text-decoration:none}:root{--sidebar-bg:rgba(15,23,42,0.3);--sidebar-border:rgba(148,163,184,0.1);--nav-item-bg:rgba(255,255,255,0.05);--nav-item-hover:rgba(255,255,255,0.1);--nav-item-active:rgba(59,130,246,0.2);--text-primary:#f1f5f9;--text-secondary:#94a3b8;--text-muted:#64748b;--accent-blue:#3b82f6;--accent-purple:#8b5cf6;--accent-green:#10b981}.sidebar{background:var(--sidebar-bg);backdrop-filter:blur(20px) saturate(180%);-webkit-backdrop-filter:blur(20px) saturate(180%);border-right:1px solid var(--sidebar-border);box-shadow:0 8px 32px 0 rgba(0,0,0,.2),inset 0 1px 0 rgba(255,255,255,.1);padding:1.5rem 1rem;height:100vh;border-radius:0;transition:all .3s cubic-bezier(.4,.4,.2,1);position:fixed;top:0;left:0;width:280px;z-index:1000;overflow:hidden;box-sizing:border-box}.sidebar,.sidebar-main-content{display:flex;flex-direction:column}.sidebar-main-content{gap:1.5rem;flex-grow:1}.sidebar-logo{padding:1.5rem 1rem 1rem;display:flex;justify-content:center;align-items:center;border-bottom:1px solid var(--sidebar-border);margin-bottom:1rem}.sidebar-block{position:relative}.sidebar-block+.sidebar-block{border-top:1px solid var(--sidebar-border);padding-top:1.5rem}.workspace-header{margin-bottom:1rem;padding-bottom:.75rem;border-bottom:1px solid var(--sidebar-border)}.workspace-title{font-size:.875rem;font-weight:600;color:var(--text-muted);text-transform:uppercase;letter-spacing:.05em;display:block}.sidebar-block:before{content:"";position:absolute;top:-.75rem;left:0;right:0;height:1px;background:linear-gradient(90deg,transparent 0,var(--sidebar-border) 50%,transparent 100%)}.sidebar-nav{display:flex;flex-direction:column;gap:.5rem}.nav-link{display:flex;align-items:center;gap:.875rem;padding:.75rem 1rem;border-radius:12px;color:var(--text-secondary);text-decoration:none;font-weight:500;font-size:1.05rem;transition:all .2s cubic-bezier(.4,0,.2,1);background:transparent;border:1px solid transparent;cursor:pointer;width:100%;text-align:left;font-family:inherit;position:relative;overflow:hidden}.nav-link:before{content:"";position:absolute;top:0;left:-100%;width:100%;height:100%;background:linear-gradient(90deg,transparent,rgba(255,255,255,.1) 50%,transparent);transition:left .5s ease}.nav-link:hover:before{left:100%}.nav-link:hover{background:var(--nav-item-hover);color:var(--text-primary);transform:translateX(4px);border-color:rgba(255,255,255,.1);box-shadow:0 4px 12px rgba(0,0,0,.1),0 0 0 1px rgba(255,255,255,.05)}.nav-link.active{background:var(--nav-item-active);color:var(--text-primary);border-color:var(--accent-blue);box-shadow:0 4px 12px rgba(59,130,246,.2),0 0 0 1px rgba(59,130,246,.3)}.nav-link-chat{background:linear-gradient(135deg,rgba(139,92,246,.1),rgba(59,130,246,.1));border-color:rgba(139,92,246,.2);position:relative}.nav-link-chat:after{content:"";position:absolute;top:0;left:0;right:0;bottom:0;border-radius:12px;opacity:0;transition:opacity .3s ease;z-index:-1}.nav-link-chat:after,.nav-link-chat:hover{background:linear-gradient(135deg,rgba(139,92,246,.2),rgba(59,130,246,.2))}.nav-link-chat:hover{border-color:rgba(139,92,246,.4);box-shadow:0 4px 20px rgba(139,92,246,.3),0 0 0 1px rgba(139,92,246,.3),0 0 20px rgba(139,92,246,.2);transform:translateX(4px) scale(1.02)}.nav-link-chat:hover:after{opacity:1}.nav-link-chat svg{filter:drop-shadow(0 0 8px rgba(139,92,246,.5))}.nav-link svg{width:1.4rem;height:1.4rem;transition:all .2s ease;flex-shrink:0}.nav-link:hover svg{transform:scale(1.1);filter:drop-shadow(0 0 8px rgba(255,255,255,.3))}.special-item{display:flex;align-items:center;gap:.5rem;position:relative}.special-item .nav-link{flex:1}.sidebar-toggle-button{display:flex;align-items:center;justify-content:center;width:2rem;height:2rem;border-radius:8px;background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.1);color:var(--text-secondary);cursor:pointer;transition:all .2s ease;flex-shrink:0}.sidebar-toggle-button:hover{background:rgba(255,255,255,.1);color:var(--text-primary);transform:scale(1.05);box-shadow:0 2px 8px rgba(0,0,0,.2)}.sidebar-toggle-button svg{width:1rem;height:1rem;transition:transform .2s ease}.sidebar-toggle-button:hover svg{transform:translateX(2px)}.sidebar-footer{margin-top:auto;padding-top:1.5rem;border-top:1px solid var(--sidebar-border);position:relative}.sidebar-footer:before{content:"";position:absolute;top:0;left:0;right:0;height:1px;background:linear-gradient(90deg,transparent 0,var(--sidebar-border) 50%,transparent 100%)}@keyframes slideIn{0%{opacity:0;transform:translateX(-20px)}to{opacity:1;transform:translateX(0)}}.nav-link{animation:slideIn .3s ease forwards}.nav-link:first-child{animation-delay:.1s}.nav-link:nth-child(2){animation-delay:.2s}.nav-link:nth-child(3){animation-delay:.3s}.nav-link:nth-child(4){animation-delay:.4s}@media (max-width:768px){.sidebar{padding:1rem .75rem;border-radius:0}.nav-link{padding:.625rem .875rem;font-size:.95rem}}.sidebar::-webkit-scrollbar{width:4px}.sidebar::-webkit-scrollbar-track{background:transparent}.sidebar::-webkit-scrollbar-thumb{background:rgba(255,255,255,.2);border-radius:2px}.sidebar::-webkit-scrollbar-thumb:hover{background:rgba(255,255,255,.3)}