.notification-bell{position:relative}.bell-button{position:relative;width:40px;height:40px;border:none;background:var(--background-color);border:1px solid var(--border-color);border-radius:50%;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:all .2s ease;color:var(--text-secondary)}.bell-button:hover{background:var(--border-color);transform:scale(1.05)}.bell-button svg{width:18px;height:18px}.notification-badge{position:absolute;top:-2px;right:-2px;background:var(--error-color);color:#fff;border-radius:10px;padding:2px 6px;font-size:10px;font-weight:600;min-width:16px;height:16px;display:flex;align-items:center;justify-content:center;animation:pulse 2s infinite}@keyframes pulse{0%{box-shadow:0 0 #ef4444b3}70%{box-shadow:0 0 0 10px #ef444400}to{box-shadow:0 0 #ef444400}}.notification-dropdown{position:absolute;top:calc(100% + 8px);right:0;background:var(--surface-color);border:1px solid var(--border-color);border-radius:12px;box-shadow:var(--shadow-lg);width:380px;max-height:500px;z-index:1000;animation:fadeIn .2s ease}.notification-header{display:flex;justify-content:space-between;align-items:center;padding:16px 20px;border-bottom:1px solid var(--border-color)}.notification-header h3{font-size:18px;font-weight:600;color:var(--text-primary);margin:0}.mark-all-read{background:none;border:none;color:var(--primary-color);font-size:14px;font-weight:500;cursor:pointer;padding:4px 8px;border-radius:4px;transition:background-color .2s ease}.mark-all-read:hover{background:var(--border-color)}.notifications-list{max-height:400px;overflow-y:auto}.notification-item{display:flex;align-items:flex-start;gap:12px;padding:16px 20px;text-decoration:none;color:var(--text-primary);border-bottom:1px solid var(--border-color);transition:background-color .2s ease;position:relative}.notification-item:hover{background:var(--border-color)}.notification-item.unread{background:#b92b270d}.notification-item.unread:hover{background:#b92b271a}.notification-icon{width:36px;height:36px;background:var(--primary-color);color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;flex-shrink:0}.notification-icon svg{width:18px;height:18px}.notification-content{flex:1;min-width:0}.notification-text{font-size:14px;line-height:1.4;margin-bottom:4px;color:var(--text-primary)}.notification-text strong{font-weight:600}.notification-time{font-size:12px;color:var(--text-muted)}.unread-dot{width:8px;height:8px;background:var(--primary-color);border-radius:50%;flex-shrink:0;margin-top:6px}.no-notifications{padding:40px 20px;text-align:center;color:var(--text-muted)}.no-notifications-icon{width:48px;height:48px;margin:0 auto 16px;color:var(--text-muted);opacity:.5}.no-notifications-icon svg{width:100%;height:100%}.no-notifications p{font-size:16px;font-weight:500;margin-bottom:8px;color:var(--text-secondary)}.no-notifications span{font-size:14px;line-height:1.4}.notification-footer{padding:12px 20px;border-top:1px solid var(--border-color);text-align:center}.notification-footer a{color:var(--primary-color);text-decoration:none;font-size:14px;font-weight:500;padding:8px 16px;border-radius:6px;transition:background-color .2s ease}.notification-footer a:hover{background:var(--border-color)}@keyframes fadeIn{0%{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:translateY(0)}}@media (max-width: 768px){.notification-dropdown{width:320px;right:-20px}.notification-item,.notification-header{padding:12px 16px}.notification-footer{padding:10px 16px}}@media (max-width: 480px){.notification-dropdown{width:280px;right:-40px}}.navbar{position:fixed;top:0;left:0;right:0;background:var(--surface-color);border-bottom:1px solid var(--border-color);z-index:1000;box-shadow:var(--shadow-sm);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.nav-container{max-width:1200px;margin:0 auto;padding:0 20px;display:flex;align-items:center;height:60px;gap:20px}.nav-logo{display:flex;align-items:center;gap:8px;text-decoration:none;color:var(--primary-color);font-weight:700;font-size:20px;flex-shrink:0}.logo-icon{width:32px;height:32px;background:var(--primary-color);color:#fff;border-radius:8px;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:18px}.logo-text{color:var(--primary-color)}.search-form{flex:1;max-width:500px}.search-input-container{position:relative;display:flex;align-items:center}.search-icon{position:absolute;left:12px;width:18px;height:18px;color:var(--text-muted);z-index:1}.search-input{width:100%;padding:10px 16px 10px 40px;border:1px solid var(--border-color);border-radius:24px;font-size:14px;outline:none;transition:all .2s ease;background:var(--background-color);color:var(--text-primary)}.search-input:focus{border-color:var(--primary-color);box-shadow:0 0 0 3px #b92b271a}.nav-actions{display:flex;align-items:center;gap:16px}.ask-btn{display:flex;align-items:center;gap:6px;padding:8px 16px;background:var(--primary-color);color:#fff;text-decoration:none;border-radius:20px;font-size:14px;font-weight:600;transition:all .2s ease;border:none;cursor:pointer}.ask-btn:hover{background:var(--primary-hover);transform:translateY(-1px)}.ask-btn svg{width:16px;height:16px}.theme-toggle{width:40px;height:40px;border:none;background:var(--background-color);border:1px solid var(--border-color);border-radius:50%;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:all .2s ease;color:var(--text-secondary)}.theme-toggle:hover{background:var(--border-color);transform:scale(1.05)}.theme-toggle svg{width:18px;height:18px}.user-menu{position:relative}.user-avatar{width:40px;height:40px;border:none;background:none;cursor:pointer;border-radius:50%;transition:transform .2s ease}.user-avatar:hover{transform:scale(1.05)}.avatar-circle{width:40px;height:40px;background:var(--primary-color);color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:600;font-size:16px}.user-dropdown{position:absolute;top:calc(100% + 8px);right:0;background:var(--surface-color);border:1px solid var(--border-color);border-radius:12px;box-shadow:var(--shadow-lg);min-width:200px;padding:8px 0;z-index:1000;animation:fadeIn .2s ease}.user-info{padding:12px 16px}.user-name{font-weight:600;color:var(--text-primary);font-size:14px}.user-email{color:var(--text-secondary);font-size:12px;margin-top:2px}.dropdown-divider{height:1px;background:var(--border-color);margin:8px 0}.dropdown-item{display:flex;align-items:center;gap:12px;width:100%;padding:10px 16px;text-decoration:none;color:var(--text-primary);border:none;background:none;text-align:left;cursor:pointer;transition:background-color .2s ease;font-size:14px}.dropdown-item:hover{background:var(--border-color)}.dropdown-item svg{width:16px;height:16px;color:var(--text-secondary)}.logout-btn{color:var(--error-color)}.logout-btn svg{color:var(--error-color)}@media (max-width: 768px){.nav-container{padding:0 15px;gap:12px}.nav-logo{font-size:18px}.logo-icon{width:28px;height:28px;font-size:16px}.search-form{max-width:200px}.search-input{font-size:12px;padding:8px 12px 8px 36px}.ask-btn{padding:6px 12px;font-size:12px}.ask-btn span{display:none}.theme-toggle,.user-avatar{width:36px;height:36px}.avatar-circle{width:36px;height:36px;font-size:14px}}@media (max-width: 480px){.search-form{display:none}.nav-actions{gap:8px}}.sidebar{width:240px;background:var(--surface-color);border-right:1px solid var(--border-color);padding:20px 0;height:calc(100vh - 60px);position:sticky;top:60px;overflow-y:auto}.sidebar-nav{display:flex;flex-direction:column;gap:4px;padding:0 16px}.nav-item{display:flex;align-items:center;gap:12px;padding:12px 16px;text-decoration:none;color:var(--text-secondary);border-radius:8px;transition:all .2s ease;font-weight:500;font-size:14px}.nav-item:hover{background:var(--border-color);color:var(--text-primary)}.nav-item.active{background:var(--primary-color);color:#fff}.nav-item svg{width:20px;height:20px;flex-shrink:0}.sidebar-divider{height:1px;background:var(--border-color);margin:16px 0}.sidebar-section{margin-top:24px}.section-title{font-size:12px;font-weight:600;color:var(--text-muted);text-transform:uppercase;letter-spacing:.5px;margin-bottom:8px;padding:0 16px}@media (max-width: 1024px){.sidebar{display:none}}.vote-buttons{display:flex;flex-direction:column;align-items:center;gap:8px}.vote-buttons.compact{flex-direction:row;gap:12px}.vote-btn{background:var(--surface-color);border:1px solid var(--border-color);width:36px;height:36px;border-radius:50%;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .2s ease;color:var(--text-secondary)}.vote-buttons.compact .vote-btn{width:auto;height:auto;padding:6px 12px;border-radius:20px;gap:6px}.vote-btn:hover{background:var(--border-color);border-color:var(--border-hover);transform:scale(1.05)}.vote-btn:disabled{opacity:.6;cursor:not-allowed;transform:none}.upvote.active{background:var(--success-color);border-color:var(--success-color);color:#fff}.upvote.active:hover{background:#059669;border-color:#059669}.downvote.active{background:var(--error-color);border-color:var(--error-color);color:#fff}.downvote.active:hover{background:#dc2626;border-color:#dc2626}.vote-btn svg{width:16px;height:16px}.vote-count{font-size:16px;font-weight:600;color:var(--text-primary);min-width:30px;text-align:center}.vote-buttons.compact .vote-count{font-size:14px;min-width:auto}@media (max-width: 768px){.vote-buttons:not(.compact){flex-direction:row;gap:10px}.vote-btn{width:32px;height:32px}.vote-btn svg{width:14px;height:14px}.vote-count{font-size:14px;min-width:25px}}.question-card{background:var(--surface-color);border:1px solid var(--border-color);border-radius:12px;padding:20px;transition:all .2s ease;animation:fadeIn .3s ease}.question-card:hover{box-shadow:var(--shadow-md);border-color:var(--border-hover)}.question-header{display:flex;align-items:center;margin-bottom:16px}.author-info{display:flex;align-items:center;gap:12px}.author-avatar{width:40px;height:40px;background:var(--primary-color);color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:600;font-size:16px}.question-date{color:var(--text-muted);font-size:12px}.question-content{margin-bottom:16px}.question-title{margin-bottom:12px}.question-title a{text-decoration:none;color:var(--text-primary);font-size:18px;font-weight:600;line-height:1.4;transition:color .2s ease}.question-title a:hover{color:var(--primary-color)}.question-body{margin-bottom:16px}.question-body p{color:var(--text-secondary);line-height:1.6;font-size:14px}.expand-btn{background:none;border:none;color:var(--primary-color);cursor:pointer;font-weight:500;font-size:14px;padding:0;margin-left:4px}.expand-btn:hover{text-decoration:underline}.question-tags{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:16px}.tag{background:var(--border-color);color:var(--text-secondary);padding:4px 12px;border-radius:16px;font-size:12px;font-weight:500;transition:all .2s ease}.tag:hover{background:var(--primary-color);color:#fff}.tag-more{background:var(--border-color);color:var(--text-muted);padding:4px 12px;border-radius:16px;font-size:12px;font-weight:500}.question-footer{display:flex;justify-content:space-between;align-items:center;padding-top:16px;border-top:1px solid var(--border-color)}.question-stats{display:flex;align-items:center;gap:16px}.stat-item{display:flex;align-items:center;gap:6px;color:var(--text-muted);font-size:12px;text-decoration:none;transition:color .2s ease}.stat-item:hover{color:var(--text-primary)}.stat-item svg{width:16px;height:16px}.question-actions{display:flex;gap:8px}.action-btn{display:flex;align-items:center;gap:6px;padding:6px 12px;background:none;border:1px solid var(--border-color);color:var(--text-secondary);border-radius:20px;font-size:12px;cursor:pointer;transition:all .2s ease}.action-btn:hover{background:var(--border-color);color:var(--text-primary)}.action-btn.following{background:var(--primary-color);color:#fff;border-color:var(--primary-color)}.action-btn.following:hover{background:var(--primary-hover);border-color:var(--primary-hover)}.action-btn:disabled{opacity:.7;cursor:not-allowed}.action-btn svg{width:14px;height:14px}@media (max-width: 768px){.question-card{padding:16px}.author-avatar{width:32px;height:32px;font-size:14px}.question-title a{font-size:16px}.question-footer{flex-direction:column;gap:12px;align-items:flex-start}.question-stats{gap:12px}.question-actions{align-self:stretch;justify-content:space-between}.action-btn{flex:1;justify-content:center}}.loading-spinner{position:fixed;top:50%;left:50%;transform:translate(-50%,-50%);z-index:1000}.spinner{width:56px;height:56px;border:3px solid #e1e5e9;border-top:3px solid #b92b27;border-radius:50%;animation:spinOnly 1s linear infinite}.loading-spinner.small .spinner{width:56px;height:56px;border-width:2px}.loading-text{margin-top:100px;color:#666;font-size:14px;font-weight:500;text-align:center;white-space:nowrap}@keyframes spinOnly{0%{transform:rotate(0)}to{transform:rotate(360deg)}}[data-theme=dark] .spinner{border-color:#2d3748;border-top-color:#b92b27}[data-theme=dark] .loading-text{color:#b3b3b3}.home{max-width:100%}.home-header{margin-bottom:24px}.home-header h1{font-size:28px;font-weight:700;color:var(--text-primary);margin-bottom:8px}.filter-tabs{display:flex;gap:4px;margin-top:16px}.filter-tab{padding:8px 16px;border:none;background:none;color:var(--text-secondary);font-weight:500;font-size:14px;cursor:pointer;border-radius:20px;transition:all .2s ease}.filter-tab:hover{background:var(--border-color);color:var(--text-primary)}.filter-tab.active{background:var(--primary-color);color:#fff}.questions-feed{display:flex;flex-direction:column;gap:16px}@media (max-width: 768px){.home-header h1{font-size:24px}.filter-tabs{flex-wrap:wrap}.filter-tab{padding:6px 12px;font-size:12px}.empty-state{padding:40px 15px}.empty-icon{width:48px;height:48px}.empty-state h3{font-size:18px}}.auth-page{min-height:100vh;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#667eea,#764ba2);padding:20px}.auth-container{display:grid;grid-template-columns:1fr 1fr;max-width:1000px;width:100%;background:var(--surface-color);border-radius:20px;box-shadow:var(--shadow-lg);overflow:hidden;min-height:600px}.auth-card{padding:40px;display:flex;flex-direction:column;justify-content:center}.auth-header{text-align:center;margin-bottom:32px}.logo{display:flex;align-items:center;justify-content:center;gap:12px;margin-bottom:24px}.logo-icon{width:48px;height:48px;background:var(--primary-color);color:#fff;border-radius:12px;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:24px}.logo-text{font-size:28px;font-weight:700;color:var(--primary-color)}.auth-header h1{font-size:28px;font-weight:700;color:var(--text-primary);margin-bottom:8px}.auth-header p{color:var(--text-secondary);font-size:16px}.error-message{display:flex;align-items:center;gap:12px;background:#fef2f2;color:#dc2626;padding:16px;border-radius:12px;margin-bottom:24px;border:1px solid #fecaca;font-size:14px}[data-theme=dark] .error-message{background:#dc26261a;border-color:#dc262633}.error-message svg{width:20px;height:20px;flex-shrink:0}.auth-form{display:flex;flex-direction:column;gap:24px}.form-group label{font-weight:600;color:var(--text-primary);font-size:14px}.input-container{position:relative;display:flex;align-items:center}.input-icon{position:absolute;left:16px;width:20px;height:20px;color:var(--text-muted);z-index:1}.form-input{width:100%;padding:16px 16px 16px 48px;border:2px solid var(--border-color);border-radius:12px;font-size:16px;transition:all .2s ease;outline:none;background:var(--background-color);color:var(--text-primary)}.form-input:focus{border-color:var(--primary-color);box-shadow:0 0 0 4px #b92b271a}.form-input::placeholder{color:var(--text-muted)}.password-toggle{position:absolute;right:16px;background:none;border:none;color:var(--text-muted);cursor:pointer;padding:4px;border-radius:4px;transition:all .2s ease}.password-toggle:hover{color:var(--text-secondary);background:var(--border-color)}.password-toggle svg{width:20px;height:20px}.password-strength{display:flex;align-items:center;gap:12px;margin-top:8px}.strength-bar{flex:1;height:4px;background:var(--border-color);border-radius:2px;overflow:hidden}.strength-fill{height:100%;transition:all .3s ease;border-radius:2px}.strength-fill.strength-1{background:#ef4444}.strength-fill.strength-2{background:#f59e0b}.strength-fill.strength-3{background:#10b981}.strength-text{font-size:12px;font-weight:600}.strength-text.strength-1{color:#ef4444}.strength-text.strength-2{color:#f59e0b}.strength-text.strength-3{color:#10b981}.auth-btn{display:flex;align-items:center;justify-content:center;gap:8px;padding:16px;background:var(--primary-color);color:#fff;border:none;border-radius:12px;font-size:16px;font-weight:600;cursor:pointer;transition:all .2s ease;margin-top:8px}.auth-btn:hover:not(:disabled){background:var(--primary-hover);transform:translateY(-2px);box-shadow:var(--shadow-md)}.auth-btn:disabled{background:var(--text-muted);cursor:not-allowed;transform:none}.btn-spinner{width:20px;height:20px;border:2px solid transparent;border-top:2px solid currentColor;border-radius:50%;animation:spin 1s linear infinite}.auth-footer{text-align:center;margin-top:32px;padding-top:24px;border-top:1px solid var(--border-color)}.auth-footer p{color:var(--text-secondary);font-size:14px}.auth-link{color:var(--primary-color);text-decoration:none;font-weight:600;transition:color .2s ease}.auth-link:hover{color:var(--primary-hover);text-decoration:underline}.auth-illustration{background:linear-gradient(135deg,#667eea1a,#764ba21a);display:flex;align-items:center;justify-content:center;padding:40px;position:relative;overflow:hidden}.auth-illustration:before{content:"";position:absolute;top:-50%;right:-50%;width:200%;height:200%;background:radial-gradient(circle,rgba(185,43,39,.1) 0%,transparent 70%);animation:float 6s ease-in-out infinite}@keyframes float{0%,to{transform:translateY(0) rotate(0)}50%{transform:translateY(-20px) rotate(180deg)}}.illustration-content{text-align:center;z-index:1;position:relative}.illustration-content h2{font-size:32px;font-weight:700;color:var(--text-primary);margin-bottom:16px}.illustration-content p{color:var(--text-secondary);font-size:18px;margin-bottom:32px;line-height:1.6}.features{display:flex;flex-direction:column;gap:20px}.feature{display:flex;align-items:center;gap:16px;padding:16px;background:var(--surface-color);border-radius:12px;box-shadow:var(--shadow-sm);transition:all .2s ease}.feature:hover{transform:translateY(-2px);box-shadow:var(--shadow-md)}.feature svg{width:24px;height:24px;color:var(--primary-color);flex-shrink:0}.feature span{font-weight:600;color:var(--text-primary)}@media (max-width: 768px){.auth-page{padding:10px}.auth-container{grid-template-columns:1fr;max-width:400px}.auth-illustration{display:none}.auth-card{padding:30px 20px}.auth-header h1{font-size:24px}.logo-icon{width:40px;height:40px;font-size:20px}.logo-text{font-size:24px}.form-input{padding:14px 14px 14px 44px;font-size:16px}.auth-btn{padding:14px}}@media (max-width: 480px){.auth-card{padding:20px 15px}.form-group{gap:6px}.auth-form{gap:20px}}.profile-page{max-width:100%}.profile-header{margin-bottom:32px}.profile-banner{background:linear-gradient(135deg,var(--primary-color) 0%,var(--primary-hover) 100%);border-radius:16px;padding:32px;margin-bottom:24px;position:relative;overflow:hidden}.profile-banner:before{content:"";position:absolute;top:0;right:0;width:200px;height:200px;background:radial-gradient(circle,rgba(255,255,255,.1) 0%,transparent 70%);border-radius:50%;transform:translate(50%,-50%)}.profile-info{display:flex;align-items:center;gap:24px;position:relative;z-index:1}.profile-avatar{width:80px;height:80px;background:#fff3;color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:32px;border:4px solid rgba(255,255,255,.3);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);flex-shrink:0}.profile-details{flex:1}.profile-name{font-size:32px;font-weight:700;color:#fff;margin-bottom:8px}.profile-email{font-size:16px;color:#fffc;margin-bottom:8px}.profile-bio{font-size:16px;color:#ffffffe6;margin-bottom:12px;line-height:1.5}.profile-meta{font-size:14px;color:#ffffffb3}.profile-stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:16px}.stat-card{background:var(--surface-color);border:1px solid var(--border-color);border-radius:12px;padding:20px;text-align:center;transition:all .2s ease}.stat-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-md);border-color:var(--border-hover)}.stat-number{font-size:28px;font-weight:700;color:var(--primary-color);margin-bottom:4px}.stat-label{font-size:14px;color:var(--text-secondary);font-weight:500;text-transform:uppercase;letter-spacing:.5px}.profile-content{background:var(--surface-color);border:1px solid var(--border-color);border-radius:16px;overflow:hidden}.profile-tabs{display:flex;border-bottom:1px solid var(--border-color);background:var(--background-color)}.tab{flex:1;display:flex;align-items:center;justify-content:center;gap:8px;padding:20px;background:none;border:none;font-size:16px;font-weight:500;color:var(--text-secondary);cursor:pointer;transition:all .2s ease;border-bottom:3px solid transparent}.tab.active{color:var(--primary-color);border-bottom-color:var(--primary-color);background:var(--surface-color)}.tab svg{width:20px;height:20px}.tab-content{padding:24px}.content-list,.answers-list{display:flex;flex-direction:column;gap:16px}.answer-preview{background:var(--background-color);border:1px solid var(--border-color);border-radius:12px;padding:20px;transition:all .2s ease}.answer-preview:hover{border-color:var(--border-hover);box-shadow:var(--shadow-sm)}.answer-content p{color:var(--text-primary);line-height:1.6;margin-bottom:16px;font-size:15px}.answer-meta{display:flex;justify-content:space-between;align-items:center}.answer-stats{display:flex;align-items:center;gap:16px;font-size:14px}.upvotes{color:var(--success-color);font-weight:600}.date{color:var(--text-muted)}.empty-state{text-align:center;padding:60px 20px;background:var(--background-color);border-radius:12px;border:1px solid var(--border-color)}.profile-error{text-align:center;padding:60px 20px;background:var(--surface-color);border-radius:16px;border:1px solid var(--border-color)}.profile-error h2{font-size:24px;font-weight:600;color:var(--text-primary);margin-bottom:8px}.profile-error p{color:var(--text-secondary);font-size:16px}[data-theme=dark] .profile-banner{background:linear-gradient(135deg,var(--primary-color) 0%,#8b1538 100%)}[data-theme=dark] .stat-card{background:var(--background-color);border-color:var(--border-color)}[data-theme=dark] .answer-preview,[data-theme=dark] .empty-state{background:var(--surface-color)}@media (max-width: 768px){.profile-banner{padding:24px 20px}.profile-info{flex-direction:column;text-align:center;gap:16px}.profile-avatar{width:64px;height:64px;font-size:24px}.profile-name{font-size:24px}.profile-stats{grid-template-columns:repeat(2,1fr);gap:12px}.stat-card{padding:16px}.stat-number{font-size:24px}.tab{padding:16px 12px;font-size:14px}.tab-content{padding:20px}.answer-preview{padding:16px}.empty-state{padding:40px 15px}.empty-icon{width:48px;height:48px}.empty-state h3{font-size:18px}}@media (max-width: 480px){.profile-stats{grid-template-columns:1fr}.tab{padding:12px 8px;font-size:12px}.tab svg{width:16px;height:16px}}.reply-card{background:var(--card-bg);border:1px solid var(--border-color);border-radius:8px;margin-bottom:12px;transition:all .2s ease;position:relative}.reply-card.level-0{margin-left:0}.reply-card.level-1{margin-left:20px;border-left:3px solid var(--primary-color)}.reply-card.level-2{margin-left:40px;border-left:3px solid var(--secondary-color)}.reply-card.level-3{margin-left:60px;border-left:3px solid var(--success-color)}.reply-content{padding:16px;background:var(--card-bg);color:var(--text-primary);border-radius:8px;transition:background .3s,color .3s}.reply-header{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:12px}.author-info{display:flex;align-items:center;gap:10px}.author-avatar{width:32px;height:32px;background:var(--primary-color);color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:600;font-size:14px;flex-shrink:0}.author-details{display:flex;flex-direction:column;gap:2px}.author-name{font-weight:600;color:var(--text-primary);font-size:14px}.reply-date{color:var(--text-muted);font-size:12px}.reply-menu{display:flex;align-items:center;gap:4px}.delete-reply-btn{display:flex;align-items:center;justify-content:center;width:28px;height:28px;background:none;border:none;color:var(--text-muted);cursor:pointer;border-radius:4px;transition:all .2s ease;opacity:.7}.delete-reply-btn:hover{background:var(--error-color);color:#fff;opacity:1}.delete-reply-btn:disabled{opacity:.5;cursor:not-allowed}.delete-reply-btn svg{width:14px;height:14px}.reply-text{margin-bottom:12px}.reply-text p{color:var(--text-primary);line-height:1.5;font-size:14px;margin:0}.reply-actions{display:flex;align-items:center;gap:12px;padding-top:8px;border-top:1px solid var(--border-color)}.reply-btn,.toggle-replies-btn{display:flex;align-items:center;gap:4px;padding:4px 8px;background:none;border:none;color:var(--text-secondary);font-size:12px;cursor:pointer;border-radius:4px;transition:all .2s ease}.reply-btn:hover,.toggle-replies-btn:hover{background:var(--border-color);color:var(--text-primary)}.reply-btn svg,.toggle-replies-btn svg{width:14px;height:14px}.reply-form{margin-top:12px;padding-top:12px;border-top:1px solid var(--border-color)}.reply-textarea{background:var(--input-bg);color:var(--text-primary);border:1px solid var(--border-color);border-radius:6px;font-size:14px;font-family:inherit;resize:vertical;outline:none;transition:border-color .2s ease,background .3s,color .3s;min-height:60px}.reply-textarea:focus{border-color:var(--primary-color);box-shadow:0 0 0 2px #b92b271a}.reply-form-actions{display:flex;justify-content:space-between;align-items:center;margin-top:8px}.char-count{font-size:11px;color:var(--text-muted)}.cancel-btn,.submit-btn{padding:6px 12px;border:none;border-radius:4px;font-size:12px;font-weight:600;cursor:pointer;transition:all .2s ease}.nested-replies{margin-top:12px;padding-top:12px;border-top:1px solid var(--border-color)}.delete-confirmation{position:fixed;inset:0;background:#00000080;display:flex;align-items:center;justify-content:center;z-index:1000;animation:fadeIn .2s ease}.delete-modal{background:var(--card-bg);border-radius:12px;padding:24px;max-width:400px;width:90%;box-shadow:var(--shadow-lg);animation:slideIn .2s ease}.delete-modal h4{font-size:18px;font-weight:600;color:var(--text-primary);margin-bottom:12px}.delete-modal p{color:var(--text-secondary);line-height:1.5;margin-bottom:20px;font-size:14px}.delete-actions{display:flex;gap:12px;justify-content:flex-end}.cancel-delete-btn,.confirm-delete-btn{padding:8px 16px;border:none;border-radius:6px;font-size:14px;font-weight:600;cursor:pointer;transition:all .2s ease}.cancel-delete-btn{background:var(--border-color);color:var(--text-secondary)}.cancel-delete-btn:hover:not(:disabled){background:var(--border-hover);color:var(--text-primary)}.confirm-delete-btn{background:var(--error-color);color:#fff}.confirm-delete-btn:hover:not(:disabled){background:#dc2626}.cancel-delete-btn:disabled,.confirm-delete-btn:disabled{opacity:.6;cursor:not-allowed}.btn-spinner{display:inline-block;width:14px;height:14px;border:2px solid transparent;border-top:2px solid currentColor;border-radius:50%;animation:spin 1s linear infinite;margin-right:6px}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes slideIn{0%{transform:translateY(-20px);opacity:0}to{transform:translateY(0);opacity:1}}@media (max-width: 768px){.reply-card.level-1{margin-left:15px}.reply-card.level-2{margin-left:30px}.reply-card.level-3{margin-left:45px}.reply-content{padding:12px}.author-avatar{width:28px;height:28px;font-size:12px}.reply-actions{flex-wrap:wrap;gap:8px}.reply-form-actions{flex-direction:column;gap:8px;align-items:stretch}.form-buttons{justify-content:flex-end}.delete-modal{padding:20px;margin:20px}.delete-actions{flex-direction:column;gap:8px}.cancel-delete-btn,.confirm-delete-btn{width:100%}}.posted-reply,.posted-comment{background:var(--card-bg);color:var(--text-primary);border-radius:8px;border:1px solid var(--border-color);padding:12px 16px;margin-top:12px;transition:background .3s,color .3s,border-color .3s}.answer-card{display:flex;gap:20px;padding:25px;border:1px solid var(--border-color);border-radius:12px;background:var(--card-bg);color:var(--text-primary);box-shadow:0 2px 8px #00000014;margin-bottom:24px;transition:background .3s,color .3s,border-color .3s}.answer-votes{flex-shrink:0}.answer-content{flex:1;min-width:0;background:var(--card-bg);color:var(--text-primary);border-radius:12px;padding:24px;transition:background .3s,color .3s}.answer-text{margin-bottom:15px;background:var(--card-bg);color:var(--text-primary);border-radius:8px;padding:12px 0;transition:background .3s,color .3s}.answer-text p{color:#333;line-height:1.6;font-size:16px;margin-bottom:15px}.answer-footer{display:flex;justify-content:space-between;align-items:center;margin-bottom:15px}.answer-meta{display:flex;align-items:center;gap:8px;font-size:14px;color:#666}.answer-actions{display:flex;gap:12px}.reply-toggle-btn,.add-reply-btn{display:flex;align-items:center;gap:6px;padding:6px 12px;background:none;border:1px solid var(--border-color);color:var(--text-secondary);border-radius:20px;font-size:12px;cursor:pointer;transition:all .2s ease}.reply-toggle-btn:hover,.add-reply-btn:hover{background:var(--border-color);color:var(--text-primary)}.reply-toggle-btn svg,.add-reply-btn svg{width:14px;height:14px}.reply-form{margin-top:16px;padding:16px;background:var(--card-bg);border:1px solid var(--border-color);border-radius:8px;transition:background .3s,color .3s,border-color .3s}.reply-textarea{width:100%;padding:12px;border:1px solid var(--border-color);border-radius:6px;font-size:15px;font-family:inherit;resize:vertical;outline:none;transition:border-color .2s,background .3s,color .3s;background:var(--input-bg);color:var(--text-primary);min-height:60px}.reply-textarea:focus{border-color:var(--primary-color);box-shadow:0 0 0 3px #b92b271a}.reply-form-actions{display:flex;justify-content:space-between;align-items:center;margin-top:12px}.char-count{font-size:12px;color:var(--text-muted)}.form-buttons{display:flex;gap:8px}.cancel-btn,.submit-btn{padding:8px 16px;border:none;border-radius:6px;font-size:14px;font-weight:600;cursor:pointer;transition:all .2s ease}.cancel-btn{background:var(--border-color);color:var(--text-secondary)}.cancel-btn:hover{background:var(--border-hover);color:var(--text-primary)}.submit-btn:hover:not(:disabled){background:var(--primary-hover)}.submit-btn:disabled{background:var(--text-muted);cursor:not-allowed}.replies-section{margin-top:20px;border-top:2px solid var(--border-color);background:var(--card-bg);color:var(--text-primary);border-radius:8px;padding:12px 0;transition:background .3s,color .3s}.replies-loading{display:flex;align-items:center;justify-content:center;gap:12px;color:var(--text-secondary);font-size:14px;text-align:center;background:var(--card-bg);color:var(--text-primary);border-radius:8px;padding:16px;transition:background .3s,color .3s}.replies-loading .spinner{width:20px;height:20px;border-width:2px;margin-right:8px}.replies-loading .loading-text{margin-top:0;margin-left:0}.loading-spinner{width:18px;height:18px;border:2px solid var(--border-color);border-top:2px solid var(--primary-color);border-radius:50%;animation:spin 1s linear infinite;flex-shrink:0}.no-replies{text-align:center;color:var(--text-muted);font-style:italic;background:var(--card-bg);color:var(--text-primary);border-radius:8px;padding:12px 0;transition:background .3s,color .3s}.replies-list{margin-top:16px;background:var(--card-bg);color:var(--text-primary);border-radius:8px;padding:12px 0;transition:background .3s,color .3s}.replies-title{font-size:16px;font-weight:600;margin-bottom:16px;border-bottom:1px solid var(--border-color);background:var(--card-bg);color:var(--text-primary);border-radius:8px;padding:12px 0;transition:background .3s,color .3s}@media (max-width: 768px){.answer-card{flex-direction:column;gap:15px;padding:20px}.answer-footer{flex-direction:column;gap:12px;align-items:flex-start}.answer-actions{align-self:stretch;justify-content:space-between}.reply-form-actions{flex-direction:column;gap:12px;align-items:stretch}.form-buttons{justify-content:flex-end}.replies-loading{padding:30px 15px}.loading-spinner{width:18px;height:18px}}[data-theme=dark] .answer-card,[data-theme=dark] .answer-content,[data-theme=dark] .answer-text,[data-theme=dark] .answer-text p,[data-theme=dark] .answer-footer,[data-theme=dark] .answer-meta,[data-theme=dark] .reply-form,[data-theme=dark] .reply-textarea,[data-theme=dark] .replies-section,[data-theme=dark] .replies-loading,[data-theme=dark] .no-replies,[data-theme=dark] .replies-list,[data-theme=dark] .replies-title{color:#fff!important}.question-detail{max-width:1000px;margin:0 auto;padding:20px;background-color:var(--bg-color);min-height:100vh}.question-container{background:var(--card-bg);border-radius:12px;box-shadow:0 2px 8px #0000001a;overflow:hidden}.question-header{display:flex;gap:20px;padding:24px;border-bottom:1px solid var(--border-color)}.question-votes{flex-shrink:0}.question-content{flex:1}.question-content h1{font-size:28px;font-weight:600;color:var(--text-primary);margin:0 0 12px;line-height:1.3}.question-meta{display:flex;align-items:center;gap:8px;font-size:14px;color:var(--text-secondary);margin-bottom:16px;flex-wrap:wrap}.question-body{font-size:16px;line-height:1.6;color:var(--text-primary);margin-bottom:16px}.question-body p{margin:0}.question-actions{margin:16px 0;display:flex;gap:12px;align-items:center}.delete-question-btn{display:flex;align-items:center;gap:8px;padding:8px 16px;background:#dc3545;color:#fff;border:none;border-radius:6px;font-size:14px;font-weight:500;cursor:pointer;transition:all .2s ease}.delete-question-btn:hover{background:#c82333;transform:translateY(-1px)}.delete-question-btn:active{transform:translateY(0)}.delete-question-btn svg{width:16px;height:16px;stroke-width:2}.question-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}.tag{background:var(--accent-color);color:#fff;padding:4px 12px;border-radius:16px;font-size:12px;font-weight:500}.answers-section{padding:24px}.answers-section h2{font-size:20px;font-weight:600;color:var(--text-primary);margin:0 0 24px}.answer-form{margin-bottom:32px;padding:20px;background:var(--input-bg);border-radius:8px;border:1px solid var(--border-color)}.answer-textarea{width:100%;min-height:120px;padding:12px;border:1px solid var(--border-color);border-radius:6px;font-size:14px;font-family:inherit;background:var(--card-bg);color:var(--text-primary);resize:vertical;margin-bottom:12px}.answer-textarea:focus{outline:none;border-color:var(--accent-color);box-shadow:0 0 0 2px #3b82f61a}.submit-answer-btn{background:var(--accent-color);color:#fff;border:none;padding:10px 20px;border-radius:6px;font-size:14px;font-weight:500;cursor:pointer;transition:all .2s ease}.submit-answer-btn:hover:not(:disabled){background:var(--accent-hover);transform:translateY(-1px)}.submit-answer-btn:disabled{opacity:.6;cursor:not-allowed;transform:none}.answers-list{display:flex;flex-direction:column;gap:16px}.loading{display:flex;justify-content:center;align-items:center;min-height:200px;font-size:16px;color:var(--text-secondary)}.error{display:flex;justify-content:center;align-items:center;min-height:200px;font-size:16px;color:#dc3545}.modal-overlay{position:fixed;inset:0;background:#00000080;display:flex;justify-content:center;align-items:center;z-index:1000;padding:20px}.modal-content{background:var(--card-bg);border-radius:12px;padding:24px;max-width:400px;width:100%;box-shadow:0 10px 25px #0003}.modal-content h3{margin:0 0 16px;font-size:20px;font-weight:600;color:var(--text-primary)}.modal-content p{margin:0 0 24px;font-size:14px;line-height:1.5;color:var(--text-secondary)}.modal-actions{display:flex;gap:12px;justify-content:flex-end}.cancel-btn{padding:8px 16px;background:transparent;color:var(--text-secondary);border:1px solid var(--border-color);border-radius:6px;font-size:14px;cursor:pointer;transition:all .2s ease}.cancel-btn:hover:not(:disabled){background:var(--hover-bg);color:var(--text-primary)}.delete-btn{padding:8px 16px;background:#dc3545;color:#fff;border:none;border-radius:6px;font-size:14px;font-weight:500;cursor:pointer;transition:all .2s ease}.delete-btn:hover:not(:disabled){background:#c82333}.cancel-btn:disabled,.delete-btn:disabled{opacity:.6;cursor:not-allowed}.comment-section,.reply-section,.comment-box,.reply-box{background:var(--card-bg);color:var(--text-primary);border-radius:8px;border:1px solid var(--border-color);padding:16px;margin-top:24px;transition:background .3s,color .3s,border-color .3s}.comment-input,.reply-input,.comment-form textarea,.comment-form input{background:var(--input-bg);color:var(--text-primary);border:1.5px solid var(--border-color);border-radius:6px;padding:10px 14px;font-size:15px;transition:background .3s,color .3s,border-color .3s}.comment-input:focus,.reply-input:focus,.comment-form textarea:focus,.comment-form input:focus{border-color:var(--accent-color);outline:none}.posted-comment,.posted-reply{background:var(--card-bg);color:var(--text-primary);border-radius:8px;border:1px solid var(--border-color);padding:12px 16px;margin-top:12px;transition:background .3s,color .3s,border-color .3s}@media (max-width: 768px){.question-detail{padding:12px}.question-header{flex-direction:column;gap:16px;padding:16px}.question-content h1{font-size:24px}.question-meta{font-size:13px}.answers-section,.answer-form{padding:16px}.modal-content{margin:20px;padding:20px}.modal-actions{flex-direction:column-reverse}.modal-actions button{width:100%;padding:12px}}:root{--bg-color: #ffffff;--card-bg: #ffffff;--text-primary: #1a1a1a;--text-secondary: #666666;--border-color: #e5e5e5;--input-bg: #f8f9fa;--hover-bg: #f8f9fa;--accent-color: #3b82f6;--accent-hover: #2563eb}[data-theme=dark]{--bg-color: #0f0f0f;--card-bg: #1a1a1a;--text-primary: #ffffff;--text-secondary: #a0a0a0;--border-color: #333333;--input-bg: #2a2a2a;--hover-bg: #2a2a2a;--accent-color: #3b82f6;--accent-hover: #2563eb}.ask-question{max-width:800px;margin:0 auto;padding:20px;background:var(--background);color:var(--text-primary);transition:background .3s,color .3s}.ask-question-container,.ask-container{background:var(--surface-color);border-radius:12px;box-shadow:var(--shadow-md, 0 2px 8px rgba(0,0,0,.1));padding:40px;border:1px solid var(--border-color);transition:background .3s,border-color .3s}.ask-question-container h1,.ask-container h1{font-size:32px;margin-bottom:10px;color:var(--text-primary);font-weight:600}.ask-question-container>p,.ask-container>p{color:var(--text-secondary);margin-bottom:30px;font-size:16px}.question-form{display:flex;flex-direction:column;gap:25px}.form-group{display:flex;flex-direction:column;gap:8px}.form-group label{font-weight:600;color:var(--text-primary);font-size:16px}.form-input,.form-textarea,input,textarea{padding:12px 16px;border:2px solid var(--border-color);border-radius:8px;font-size:16px;font-family:inherit;background:var(--surface-color);color:var(--text-primary);transition:border-color .2s,box-shadow .2s,background .3s,color .3s;outline:none;resize:vertical}.form-input:focus,.form-textarea:focus,input:focus,textarea:focus{border-color:var(--primary-color);box-shadow:0 0 0 3px #b92b2714}.form-textarea,textarea{min-height:120px;line-height:1.5}.char-count,.help-text,small{font-size:12px;color:var(--text-muted);text-align:right}.form-actions{display:flex;gap:15px;justify-content:flex-end;margin-top:20px}.cancel-btn,.submit-btn{padding:12px 24px;border-radius:8px;font-size:16px;font-weight:600;cursor:pointer;transition:all .2s;border:none}.cancel-btn{background:var(--border-color);color:var(--text-secondary);border:2px solid var(--border-color)}.cancel-btn:hover{background:var(--surface-color);border-color:var(--border-hover, #ced4da);color:var(--text-primary)}.submit-btn{background:var(--primary-color);color:#fff}.submit-btn:hover:not(:disabled){background:var(--primary-hover, #a02622);transform:translateY(-1px)}.submit-btn:disabled{background:#ccc;cursor:not-allowed;transform:none}.error-message{color:var(--danger-color, #d32f2f);background:var(--danger-bg, #fff0f0);border-radius:6px;padding:.75rem 1rem;margin-bottom:1rem;font-size:1rem}.auth-required{background:var(--surface-color);border:1px solid var(--border-color);border-radius:12px;max-width:500px;margin:4rem auto;padding:2rem;text-align:center;color:var(--text-primary)}.auth-required h2{font-size:1.5rem;font-weight:600;margin-bottom:.5rem}.auth-required p{color:var(--text-secondary);font-size:1rem}.comment-section,.reply-section,.comment-box,.reply-box{background:var(--surface-color);color:var(--text-primary);border-radius:8px;border:1px solid var(--border-color);padding:16px;margin-top:24px;transition:background .3s,color .3s,border-color .3s}.comment-input,.reply-input,.comment-form textarea,.comment-form input{background:var(--surface-color);color:var(--text-primary);border:1.5px solid var(--border-color);border-radius:6px;padding:10px 14px;font-size:15px;transition:background .3s,color .3s,border-color .3s}.comment-input:focus,.reply-input:focus,.comment-form textarea:focus,.comment-form input:focus{border-color:var(--primary-color);outline:none}@media (max-width: 768px){.ask-question{padding:15px}.ask-question-container,.ask-container{padding:25px 20px}.ask-question-container h1,.ask-container h1{font-size:24px}.ask-question-container>p,.ask-container>p{font-size:14px}.form-actions{flex-direction:column}.cancel-btn,.submit-btn{width:100%}}.search-page{max-width:100%}.search-header{margin-bottom:24px;padding-bottom:20px;border-bottom:1px solid var(--border-color)}.search-header h1{font-size:28px;font-weight:700;color:var(--text-primary);margin-bottom:8px}.search-query{color:var(--text-secondary);font-size:14px;margin-bottom:16px}.search-filters{display:flex;gap:20px;align-items:center}.filter-group{display:flex;align-items:center;gap:8px}.filter-group label{font-size:14px;font-weight:500;color:var(--text-secondary)}.filter-group select{padding:6px 12px;border:1px solid var(--border-color);border-radius:6px;background:var(--surface-color);color:var(--text-primary);font-size:14px;cursor:pointer;outline:none;transition:border-color .2s ease}.filter-group select:focus{border-color:var(--primary-color)}.search-results,.results-list{display:flex;flex-direction:column;gap:16px}.empty-state p{color:var(--text-secondary);font-size:14px;margin-bottom:24px}.search-suggestions{text-align:left;max-width:300px;margin:0 auto}.search-suggestions h4{font-size:16px;font-weight:600;color:var(--text-primary);margin-bottom:12px}.search-suggestions ul{list-style:none;padding:0}.search-suggestions li{color:var(--text-secondary);font-size:14px;margin-bottom:8px;padding-left:16px;position:relative}.search-suggestions li:before{content:"•";color:var(--primary-color);position:absolute;left:0}@media (max-width: 768px){.search-header h1{font-size:24px}.search-filters{flex-direction:column;gap:12px;align-items:stretch}.filter-group{justify-content:space-between}.empty-state{padding:40px 15px}.empty-icon{width:48px;height:48px}.empty-state h3{font-size:18px}}.topics-page{max-width:100%}.topics-header{margin-bottom:32px}.topics-header h1{font-size:28px;font-weight:700;color:var(--text-primary);margin-bottom:8px}.topics-header p{color:var(--text-secondary);font-size:16px;margin-bottom:24px}.topics-controls{display:flex;gap:16px;align-items:center;margin-bottom:24px}.search-container{position:relative;flex:1;max-width:400px}.search-icon{position:absolute;left:12px;top:50%;transform:translateY(-50%);width:18px;height:18px;color:var(--text-muted)}.search-input{width:100%;padding:10px 16px 10px 40px;border:1px solid var(--border-color);border-radius:8px;font-size:14px;outline:none;transition:border-color .2s ease;background:var(--surface-color);color:var(--text-primary)}.search-input:focus{border-color:var(--primary-color)}.sort-select{padding:10px 16px;border:1px solid var(--border-color);border-radius:8px;background:var(--surface-color);color:var(--text-primary);font-size:14px;cursor:pointer;outline:none}.followed-topics-summary{background:var(--surface-color);border:1px solid var(--border-color);border-radius:12px;padding:20px;margin-bottom:24px}.followed-topics-summary h3{font-size:16px;font-weight:600;color:var(--text-primary);margin-bottom:12px}.followed-tags{display:flex;flex-wrap:wrap;gap:8px}.followed-tag{background:var(--primary-color);color:#fff;padding:4px 12px;border-radius:16px;font-size:12px;font-weight:500}.more-count{background:var(--border-color);color:var(--text-secondary);padding:4px 12px;border-radius:16px;font-size:12px;font-weight:500}.topics-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:20px}.topic-card{background:var(--surface-color);border:1px solid var(--border-color);border-radius:12px;padding:20px;transition:all .2s ease}.topic-card:hover{box-shadow:var(--shadow-md);border-color:var(--border-hover)}.topic-header{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:12px}.topic-name{font-size:18px;font-weight:600;color:var(--text-primary);margin:0}.topic-description{color:var(--text-secondary);font-size:14px;line-height:1.5;margin-bottom:16px}.topic-stats{display:flex;gap:16px;align-items:center}.stat{display:flex;flex-direction:column;align-items:center;text-align:center}.stat-number{font-size:16px;font-weight:600;color:var(--text-primary)}.stat-label{font-size:11px;color:var(--text-muted);text-transform:uppercase;letter-spacing:.5px}.stat-text{font-size:11px;color:var(--text-muted)}.follow-btn{display:flex;align-items:center;gap:6px;padding:8px 16px;border:1px solid var(--primary-color);background:none;color:var(--primary-color);border-radius:20px;font-size:12px;font-weight:600;cursor:pointer;transition:all .2s ease;flex-shrink:0}.follow-btn:hover,.follow-btn.following{background:var(--primary-color);color:#fff}.follow-btn.following:hover{background:var(--primary-hover)}.follow-btn svg{width:14px;height:14px}.follow-btn:disabled{opacity:.7;cursor:not-allowed}.btn-spinner{width:14px;height:14px;border:2px solid transparent;border-top:2px solid currentColor;border-radius:50%;animation:spin 1s linear infinite}.empty-state{text-align:center;padding:60px 20px;background:var(--surface-color);border-radius:12px;border:1px solid var(--border-color);grid-column:1 / -1}.empty-state h3{font-size:20px;font-weight:600;color:var(--text-primary);margin-bottom:8px}.empty-state p{color:var(--text-secondary);font-size:14px}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}@media (max-width: 768px){.topics-header h1{font-size:24px}.topics-controls{flex-direction:column;gap:12px;align-items:stretch}.search-container{max-width:none}.topics-grid{grid-template-columns:1fr;gap:16px}.topic-card{padding:16px}.topic-header{flex-direction:column;gap:12px;align-items:stretch}.follow-btn{align-self:flex-start}.followed-topics-summary{padding:16px}.empty-state{padding:40px 15px}.empty-icon{width:48px;height:48px}.empty-state h3{font-size:18px}}.following-page{max-width:100%}.following-header{margin-bottom:32px}.following-header h1{font-size:28px;font-weight:700;color:var(--text-primary);margin-bottom:8px}.following-header p{color:var(--text-secondary);font-size:16px;margin-bottom:24px}.following-summary{background:var(--surface-color);border:1px solid var(--border-color);border-radius:12px;padding:20px;margin-bottom:24px}.summary-stats{display:flex;gap:32px;justify-content:center}.summary-stat{display:flex;flex-direction:column;align-items:center;text-align:center}.stat-number{font-size:24px;font-weight:700;color:var(--primary-color);margin-bottom:4px}.stat-label{font-size:12px;color:var(--text-secondary);text-transform:uppercase;letter-spacing:.5px}.following-tabs{display:flex;gap:4px;background:var(--surface-color);border:1px solid var(--border-color);border-radius:12px;padding:4px}.tab{display:flex;align-items:center;gap:8px;flex:1;padding:12px 16px;border:none;background:none;color:var(--text-secondary);font-weight:500;font-size:14px;cursor:pointer;border-radius:8px;transition:all .2s ease;justify-content:center}.tab:hover{background:var(--border-color);color:var(--text-primary)}.tab.active{background:var(--primary-color);color:#fff}.tab svg{width:16px;height:16px}.following-content{margin-top:24px}.questions-feed,.recent-activity{display:flex;flex-direction:column;gap:16px}.topics-overview{display:block}.topics-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:20px}.topic-overview-card{background:var(--surface-color);border:1px solid var(--border-color);border-radius:12px;padding:20px;transition:all .2s ease}.topic-overview-card:hover{box-shadow:var(--shadow-md);border-color:var(--border-hover)}.topic-header{margin-bottom:16px}.topic-header h3{font-size:18px;font-weight:600;color:var(--text-primary);margin-bottom:8px}.topic-stats{display:flex;gap:16px;font-size:12px;color:var(--text-muted)}.recent-questions h4{font-size:14px;font-weight:600;color:var(--text-primary);margin-bottom:8px}.recent-questions ul{list-style:none;padding:0;margin:0}.recent-questions li{margin-bottom:6px}.recent-questions a{color:var(--text-secondary);text-decoration:none;font-size:13px;line-height:1.4;transition:color .2s ease}.recent-questions a:hover{color:var(--primary-color)}.empty-following{text-align:center;padding:60px 20px;background:var(--surface-color);border-radius:16px;border:1px solid var(--border-color)}.empty-state{text-align:center;padding:60px 20px;background:var(--surface-color);border-radius:12px;border:1px solid var(--border-color)}.empty-icon{width:64px;height:64px;margin:0 auto 16px;color:var(--text-muted)}.empty-icon svg{width:100%;height:100%}.empty-state h3,.empty-following h3{font-size:20px;font-weight:600;color:var(--text-primary);margin-bottom:8px}.empty-state p,.empty-following p{color:var(--text-secondary);font-size:14px;margin-bottom:24px}.suggested-topics{margin:24px 0}.suggested-topics h4{font-size:16px;font-weight:600;color:var(--text-primary);margin-bottom:12px}.topic-suggestions{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;margin-bottom:24px}.suggested-topic{background:var(--border-color);color:var(--text-secondary);padding:6px 12px;border-radius:16px;font-size:12px;font-weight:500;transition:all .2s ease;cursor:pointer}.suggested-topic:hover{background:var(--primary-color);color:#fff}.explore-topics-btn{display:inline-flex;align-items:center;gap:8px;padding:12px 24px;background:var(--primary-color);color:#fff;text-decoration:none;border-radius:8px;font-weight:600;transition:all .2s ease}.explore-topics-btn:hover{background:var(--primary-hover);transform:translateY(-1px)}.explore-topics-btn svg{width:18px;height:18px}@media (max-width: 768px){.following-header h1{font-size:24px}.summary-stats{gap:20px}.stat-number{font-size:20px}.following-tabs{flex-direction:column;gap:2px}.tab{justify-content:flex-start;padding:10px 12px;font-size:12px}.topics-grid{grid-template-columns:1fr;gap:16px}.topic-overview-card{padding:16px}.empty-state,.empty-following{padding:40px 15px}.empty-icon{width:48px;height:48px}.empty-state h3,.empty-following h3{font-size:18px}.topic-suggestions{gap:6px}}:root{--primary-color: #b92b27;--primary-hover: #a02622;--secondary-color: #2e69ff;--background-color: #ffffff;--surface-color: #ffffff;--text-primary: #1a1a1a;--text-secondary: #666666;--text-muted: #999999;--border-color: #e1e5e9;--border-hover: #d1d5db;--shadow-sm: 0 1px 3px rgba(0, 0, 0, .1);--shadow-md: 0 4px 12px rgba(0, 0, 0, .1);--shadow-lg: 0 10px 30px rgba(0, 0, 0, .15);--gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);--gradient-secondary: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);--success-color: #10b981;--warning-color: #f59e0b;--error-color: #ef4444;--info-color: #3b82f6}[data-theme=dark]{--background-color: #0f1419;--surface-color: #1a1f2e;--text-primary: #ffffff;--text-secondary: #b3b3b3;--text-muted: #666666;--border-color: #2d3748;--border-hover: #4a5568;--shadow-sm: 0 1px 3px rgba(0, 0, 0, .3);--shadow-md: 0 4px 12px rgba(0, 0, 0, .3);--shadow-lg: 0 10px 30px rgba(0, 0, 0, .4)}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background-color:var(--background-color);color:var(--text-primary);line-height:1.6;transition:background-color .3s ease,color .3s ease}.App{min-height:100vh}.app-layout{display:flex;flex-direction:column;min-height:100vh}.main-layout{display:flex;flex:1;padding-top:60px}.main-content{flex:1;padding:20px;max-width:800px;margin:0 auto;width:100%}::-webkit-scrollbar{width:8px}::-webkit-scrollbar-track{background:var(--background-color)}::-webkit-scrollbar-thumb{background:var(--border-color);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:var(--border-hover)}@media (max-width: 1024px){.main-layout{flex-direction:column}.main-content{padding:15px}}@media (max-width: 768px){.main-content{padding:10px}}.fade-in{animation:fadeIn .3s ease-in}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.slide-in{animation:slideIn .3s ease-out}@keyframes slideIn{0%{transform:translate(-20px);opacity:0}to{transform:translate(0);opacity:1}}.text-center{text-align:center}.text-left{text-align:left}.text-right{text-align:right}.mb-1{margin-bottom:.25rem}.mb-2{margin-bottom:.5rem}.mb-3{margin-bottom:.75rem}.mb-4{margin-bottom:1rem}.mb-5{margin-bottom:1.25rem}.mt-1{margin-top:.25rem}.mt-2{margin-top:.5rem}.mt-3{margin-top:.75rem}.mt-4{margin-top:1rem}.mt-5{margin-top:1.25rem}.p-1{padding:.25rem}.p-2{padding:.5rem}.p-3{padding:.75rem}.p-4{padding:1rem}.p-5{padding:1.25rem}.flex{display:flex}.flex-col{flex-direction:column}.items-center{align-items:center}.justify-center{justify-content:center}.justify-between{justify-content:space-between}.gap-1{gap:.25rem}.gap-2{gap:.5rem}.gap-3{gap:.75rem}.gap-4{gap:1rem}.gap-5{gap:1.25rem}.w-full{width:100%}.h-full{height:100%}.rounded{border-radius:.375rem}.rounded-lg{border-radius:.5rem}.rounded-xl{border-radius:.75rem}.shadow{box-shadow:var(--shadow-sm)}.shadow-md{box-shadow:var(--shadow-md)}.shadow-lg{box-shadow:var(--shadow-lg)}