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var(--chat-border-accent);position:relative;overflow:hidden}.encryption-info::before{content:'';position:absolute;top:0;left:0;right:0;height:2px;background:linear-gradient(90deg,var(--chat-accent),var(--chat-accent-bright),var(--chat-accent))}.encryption-info-title{font-size:13px;font-weight:600;color:var(--chat-accent-bright);margin-bottom:10px;display:flex;align-items:center;gap:8px;font-family:'SF Mono',Monaco,Inconsolata,monospace;letter-spacing:.02em}.encryption-info-title svg{width:16px;height:16px}.encryption-info-text{font-size:13px;color:var(--chat-text-secondary);line-height:1.7}.chat-body{position:fixed;top:calc(var(--header-height) + var(--safe-top) + 4px);bottom:calc(64px + var(--safe-bottom));left:0;right:0;overflow-y:auto;padding:16px;background:var(--chat-bg-deep)}.chat-body::-webkit-scrollbar{width:6px}.chat-body::-webkit-scrollbar-track{background:0 0}.chat-body::-webkit-scrollbar-thumb{background:var(--chat-bg-elevated);border-radius:3px}.chat-body::-webkit-scrollbar-thumb:hover{background:var(--chat-bg-hover)}.chat-date{text-align:center;margin:24px 0}.chat-date span{font-size:12px;font-weight:600;color:var(--chat-text-secondary);background:var(--chat-bg-elevated);padding:8px 18px;border-radius:20px;border:1px solid var(--chat-border-strong)}.chat-unread-divider{display:flex;align-items:center;margin:20px 0;gap:12px}.chat-unread-divider::after,.chat-unread-divider::before{content:'';flex:1;height:1px;background:linear-gradient(90deg,transparent,var(--chat-accent),transparent);opacity:.4}.chat-unread-divider span{font-size:11px;color:var(--chat-accent);font-weight:600;text-transform:uppercase;letter-spacing:.05em}.chat-message{display:flex;gap:10px;margin-bottom:14px;max-width:82%;animation:msg-in .25s cubic-bezier(.4,0,.2,1)}@keyframes msg-in{from{opacity:0;transform:translateY(10px) scale(.98)}to{opacity:1;transform:translateY(0) scale(1)}}.chat-message.self{flex-direction:row-reverse;margin-left:auto}.chat-msg-avatar{width:40px;height:40px;border-radius:50%;background:linear-gradient(135deg,var(--chat-accent) 0,var(--chat-accent-bright) 100%);color:#0d1117;display:flex;align-items:center;justify-content:center;font-size:14px;font-weight:700;flex-shrink:0;position:relative;box-shadow:var(--chat-shadow-md);border:2px solid var(--chat-bg-deep)}.chat-msg-avatar .verified-badge{position:absolute;bottom:-1px;right:-1px;width:14px;height:14px;background:var(--chat-accent);border-radius:50%;border:2px solid var(--chat-bg-deep);display:flex;align-items:center;justify-content:center;box-shadow:0 0 8px var(--chat-accent-glow)}.chat-msg-avatar .verified-badge svg{width:8px;height:8px;color:#fff}.chat-msg-content{background:var(--chat-msg-other);padding:12px 16px;border-radius:4px 14px 14px 4px;box-shadow:var(--chat-shadow-sm);border:1px solid var(--chat-border-strong)}.chat-message.self .chat-msg-content{background:var(--chat-msg-self);border-radius:14px 4px 4px 14px;border-color:rgba(37,99,235,.4)}.chat-msg-name{font-size:13px;font-weight:600;color:var(--chat-accent-bright);margin-bottom:6px;letter-spacing:-.01em}.chat-message.self .chat-msg-name{display:none}.chat-msg-text{font-size:15px;line-height:1.6;color:var(--chat-text-primary)}.chat-message.self .chat-msg-text{color:#fff}.chat-msg-footer{display:flex;align-items:center;gap:8px;margin-top:8px}.chat-msg-time{font-size:11px;color:var(--chat-text-tertiary);font-family:'SF Mono',Monaco,Inconsolata,monospace}.chat-message.self .chat-msg-time{color:rgba(255,255,255,.7)}.chat-msg-status{display:flex;align-items:center}.chat-msg-status svg{width:13px;height:13px}.chat-msg-status.encrypted svg{color:var(--chat-accent);filter:drop-shadow(0 0 4px var(--chat-accent-glow))}.chat-message.self .chat-msg-footer{justify-content:flex-end}.chat-typing{display:flex;align-items:center;gap:8px;padding:8px 0;margin-bottom:14px}.chat-typing-avatar{width:28px;height:28px;border-radius:50%;background:var(--chat-bg-elevated);color:var(--chat-text-secondary);display:flex;align-items:center;justify-content:center;font-size:10px;font-weight:600}.chat-typing-dots{display:flex;gap:4px;padding:10px 16px;background:var(--chat-bg-elevated);border-radius:4px 12px 12px 4px;border:1px solid var(--chat-border)}.chat-typing-dots span{width:6px;height:6px;background:var(--chat-accent);border-radius:50%;animation:typing 1.4s infinite;opacity:.6}.chat-typing-dots span:nth-child(2){animation-delay:.2s}.chat-typing-dots span:nth-child(3){animation-delay:.4s}@keyframes typing{0%,100%,60%{transform:translateY(0);opacity:.4}30%{transform:translateY(-4px);opacity:1}}.chat-login-required{text-align:center;padding:48px 24px;margin:40px 16px;background:linear-gradient(180deg,var(--chat-bg-tertiary) 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svg{width:32px;height:32px;color:var(--chat-accent)}.chat-login-title{font-size:18px;font-weight:600;color:var(--chat-text-primary);margin-bottom:12px;letter-spacing:-.01em}.chat-login-text{font-size:14px;color:var(--chat-text-secondary);line-height:1.7;margin-bottom:28px;max-width:280px;margin-left:auto;margin-right:auto}.chat-login-btn{display:inline-flex;align-items:center;gap:8px;padding:14px 32px;background:linear-gradient(135deg,var(--chat-accent) 0,var(--chat-accent-bright) 100%);color:#05080c;border:none;border-radius:var(--radius-sm);font-size:14px;font-weight:600;cursor:pointer;transition:all .25s cubic-bezier(.4, 0, .2, 1);box-shadow:0 4px 16px var(--chat-accent-glow)}.chat-login-btn:hover{transform:translateY(-2px);box-shadow:0 6px 24px var(--chat-accent-glow)}.chat-login-btn:active{transform:translateY(0)}.chat-login-btn svg{width:16px;height:16px}.chat-login-hint{margin-top:20px;font-size:12px;color:var(--chat-text-muted)}.chat-login-hint a{color:var(--chat-accent);text-decoration:none;font-weight:500}.chat-login-hint a:hover{text-decoration:underline}.chat-welcome{padding:20px;margin:12px 0 20px;background:linear-gradient(135deg,var(--chat-bg-tertiary) 0,var(--chat-bg-secondary) 100%);border-radius:var(--radius-lg);border:1px solid var(--chat-border-strong);box-shadow:var(--chat-shadow-sm)}.chat-topic-label{font-size:12px;color:var(--chat-accent);margin-bottom:8px;font-weight:600;text-transform:uppercase;letter-spacing:.5px}.chat-topic-title{font-size:17px;font-weight:700;color:var(--chat-text-primary);line-height:1.4;margin-bottom:14px}.chat-online-info{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--chat-text-secondary);margin-bottom:16px;padding:10px 14px;background:var(--chat-bg-elevated);border-radius:var(--radius-md)}.chat-online-dot{width:8px;height:8px;background:var(--chat-accent);border-radius:50%;animation:pulse 2s infinite;box-shadow:0 0 8px var(--chat-accent-glow)}.chat-security-hint{display:flex;align-items:center;gap:8px;padding:12px 14px;background:var(--chat-accent-dim);border-radius:var(--radius-md);font-size:12px;color:var(--chat-text-secondary)}.chat-security-hint svg{width:14px;height:14px;color:var(--chat-accent-bright);flex-shrink:0}.chat-security-link{color:var(--chat-accent-bright);font-size:12px;text-decoration:none;margin-left:auto;font-weight:500}.chat-security-link:hover{text-decoration:underline}.chat-footer{position:fixed;bottom:0;left:0;right:0;padding:14px 16px;padding-bottom:calc(14px + var(--safe-bottom));background:var(--chat-bg-tertiary);border-top:1px solid var(--chat-border-strong);display:flex;gap:12px;align-items:flex-end;box-shadow:0 -4px 20px rgba(0,0,0,.25)}.chat-footer::before{content:'';position:absolute;top:0;left:0;right:0;height:2px;background:linear-gradient(90deg,transparent 0,var(--chat-accent) 20%,var(--chat-accent-bright) 50%,var(--chat-accent) 80%,transparent 100%)}.chat-input-wrap{flex:1;background:var(--chat-bg-input);border-radius:10px;padding:14px 18px;display:flex;align-items:center;transition:all .2s;border:2px solid var(--chat-border-input)}.chat-input-wrap:focus-within{background:var(--chat-bg-elevated);border-color:var(--chat-accent);box-shadow:0 0 0 3px var(--chat-accent-dim)}.chat-input{flex:1;background:0 0;border:none;font-size:15px;color:var(--chat-text-primary);outline:0;resize:none;max-height:100px;line-height:1.5}.chat-input::placeholder{color:var(--chat-text-placeholder);font-size:14px}.chat-send{width:48px;height:48px;border-radius:10px;background:linear-gradient(135deg,var(--chat-accent) 0,var(--chat-accent-bright) 100%);border:none;color:#0d1117;display:flex;align-items:center;justify-content:center;cursor:pointer;flex-shrink:0;transition:all .2s cubic-bezier(.4, 0, .2, 1);box-shadow:0 4px 12px var(--chat-accent-glow)}.chat-send:hover:not(:disabled){transform:translateY(-2px);box-shadow:0 6px 20px var(--chat-accent-glow)}.chat-send:active:not(:disabled){transform:translateY(0) scale(.97)}.chat-send svg{width:20px;height:20px}.chat-send:disabled{background:var(--chat-bg-elevated);color:var(--chat-text-muted);border:2px solid var(--chat-border-strong);box-shadow:none;cursor:not-allowed}.bridge-overlay{position:fixed;inset:0;background:rgba(0,0,0,.5);-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);z-index:200;opacity:0;visibility:hidden;transition:opacity .25s,visibility .25s;display:flex;align-items:flex-end;justify-content:center}.bridge-overlay.show{opacity:1;visibility:visible}.bridge-modal{width:100%;background:var(--bg);border-radius:16px 16px 0 0;padding:12px 24px calc(28px + var(--safe-bottom));transform:translateY(100%);transition:transform .3s cubic-bezier(.32, .72, 0, 1)}.bridge-overlay.show .bridge-modal{transform:translateY(0)}.bridge-handle{width:36px;height:4px;background:rgba(120,120,128,.3);border-radius:2px;margin:0 auto 20px}.bridge-icon{width:48px;height:48px;background:rgba(30,58,95,.08);border-radius:50%;display:flex;align-items:center;justify-content:center;margin:0 auto 16px}.bridge-icon svg{width:24px;height:24px;color:var(--brand,#1e3a5f)}.bridge-title{font-size:18px;font-weight:700;color:var(--text);text-align:center;margin-bottom:8px;letter-spacing:-.01em}.bridge-desc{font-size:13px;color:var(--text-secondary);text-align:center;margin-bottom:16px;line-height:1.5;max-width:320px;margin-left:auto;margin-right:auto}.bridge-url{font-size:12px;font-family:ui-monospace,SFMono-Regular,'SF Mono',Menlo,monospace;color:var(--text-muted);text-align:center;padding:10px 14px;background:var(--bg-secondary);border:1px solid var(--border);border-radius:8px;margin-bottom:20px;word-break:break-all;line-height:1.4}.bridge-actions{display:flex;gap:10px}.bridge-btn{flex:1;padding:13px 16px;border-radius:10px;font-size:15px;font-weight:600;cursor:pointer;transition:opacity .15s,transform 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translateY(0)}.menu-item{display:flex;align-items:center;gap:12px;padding:14px 16px;font-size:15px;color:var(--text);background:0 0;border:none;width:100%;cursor:pointer;transition:background .15s}.menu-item:first-child{border-radius:6px 6px 0 0}.menu-item:last-child{border-radius:0 0 6px 6px}.menu-item:active{background:var(--bg-secondary)}.menu-item svg{width:18px;height:18px;color:var(--text-tertiary)}.menu-divider{height:1px;background:var(--border);margin:4px 0}.settings-group{padding:12px 16px}.settings-label{font-size:12px;color:var(--text-muted);margin-bottom:10px;text-transform:uppercase;letter-spacing:.5px}.theme-btns{display:flex;gap:8px}.theme-btn{flex:1;display:flex;flex-direction:column;align-items:center;gap:4px;padding:10px 6px;border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--bg);color:var(--text-secondary);cursor:pointer;transition:all .15s}.theme-btn svg{width:20px;height:20px}.theme-btn span{font-size:10px;font-weight:500}.theme-btn:active{background:var(--bg-secondary)}.theme-btn.active{background:var(--accent);color:#fff;border-color:var(--accent)}.theme-btn.active svg{color:#fff}.font-size-btns{display:flex;gap:8px}.font-size-btn{flex:1;display:flex;align-items:center;justify-content:center;padding:10px 8px;border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--bg);color:var(--text-secondary);cursor:pointer;transition:all .15s}.font-size-btn:active{background:var(--bg-secondary)}.font-size-btn.active{background:var(--accent);color:#fff;border-color:var(--accent)}.font-preview{font-weight:600}.font-preview.small{font-size:12px}.font-preview.medium{font-size:14px}.font-preview.large{font-size:16px}.font-preview.xlarge{font-size:18px}.text-size-group{padding:10px 16px}.text-size-label{font-size:12px;color:var(--text-muted);margin-bottom:8px}.text-size-btns{display:flex;gap:8px}.text-size-btn{flex:1;padding:8px;border:1px solid var(--border);border-radius:var(--radius-md);background:var(--bg);color:var(--text-secondary);font-weight:500;cursor:pointer;transition:all .15s}.text-size-btn.active{background:var(--brand);color:#fff;border-color:var(--brand)}.user-btn{padding:0}.user-avatar{width:32px;height:32px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:14px;font-weight:600;color:#fff;text-transform:uppercase}.user-menu{position:fixed;top:calc(var(--header-height) + var(--safe-top) + 8px);right:12px;background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-lg);box-shadow:0 8px 32px rgba(0,0,0,.15);min-width:260px;max-width:300px;z-index:152;opacity:0;visibility:hidden;transform:scale(.95) translateY(-8px);transform-origin:top right;transition:opacity .2s,visibility .2s,transform .2s;overflow:hidden}.user-menu.show{opacity:1;visibility:visible;transform:scale(1) 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Georgia, serif);font-weight:700;font-size:11px;line-height:1;letter-spacing:-.5px;display:flex;align-items:baseline;gap:1px}.menu-display-aa span{font-size:15px}.menu-badge{margin-left:auto;font-size:12px;font-weight:600;color:var(--text-muted);min-width:18px;text-align:center}.menu-badge:empty{display:none}.menu-theme-row{display:flex;align-items:center;justify-content:space-between;padding:12px 16px}.menu-theme-label{display:flex;align-items:center;gap:12px;font-size:15px;color:var(--text)}.menu-theme-label svg{width:18px;height:18px;color:var(--text-tertiary)}.menu-theme-switch{background:0 0;border:none;cursor:pointer;padding:0}.menu-switch-track{display:block;width:42px;height:24px;background:var(--border);border-radius:12px;position:relative;transition:background .2s}.menu-switch-thumb{display:block;width:20px;height:20px;background:#fff;border-radius:50%;position:absolute;top:2px;left:2px;transition:transform .2s;box-shadow:0 1px 3px rgba(0,0,0,.15)}.menu-theme-switch[aria-checked=true] .menu-switch-track{background:var(--brand,#1e3a5f)}.menu-theme-switch[aria-checked=true] .menu-switch-thumb{transform:translateX(18px)}.menu-signin-cta{display:flex;align-items:center;gap:12px;padding:16px;text-decoration:none;color:var(--text);transition:background .15s}.menu-signin-icon{width:40px;height:40px;border-radius:50%;background:var(--bg-secondary);display:flex;align-items:center;justify-content:center;flex-shrink:0}.menu-signin-icon svg{width:20px;height:20px;color:var(--text-tertiary)}.menu-signin-text{display:flex;flex-direction:column;gap:2px}.menu-signin-label{font-size:15px;font-weight:600;color:var(--text)}.menu-signin-hint{font-size:12px;color:var(--text-muted)}@media (hover:hover){.menu-item:hover{background:var(--bg-secondary)}.menu-item-danger:hover{background:#fef2f2}.menu-signin-cta:hover{background:var(--bg-secondary)}.menu-theme-row:hover{background:var(--bg-secondary)}}@media (hover:hover) and 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1.25rem)}.hero-figure{padding:0 24px}.video-player-wrapper{padding:0 24px}.article-key-points{margin:0 24px 24px}.social-section{margin:0 24px 24px}.author-card{margin:32px 24px;padding:24px}}@media (min-width:1024px){.article-container{max-width:820px}.article-title{font-size:2.75rem}.author-card{padding:28px}.author-card-img{width:90px;height:90px}.tags{margin:36px 0 0;padding-top:28px;gap:10px}.tags .tag{padding:7px 16px;font-size:13px}.read-next{margin:48px 0 0;padding-top:40px}.read-next+.read-next{margin-top:12px;padding-top:36px}.read-next-title{margin-bottom:24px}.read-next-item{padding:18px 0}.item-figure{width:140px;height:94px;border-radius:8px}.item-link{gap:20px}.item-title{font-size:16px;line-height:1.5}.item-meta{font-size:13px}}@media (max-width:768px){.article-container{max-width:100%}.article-header{padding:16px 16px 0}.article-title{font-size:1.5rem;margin-bottom:10px}.article-lead{font-size:1rem;margin-bottom:12px}.article-meta{gap:5px;font-size:12px}.meta-trust{font-size:13px}.meta-trust .source-badge{font-size:13px}.meta-trust .source-badge-icon,.meta-trust .source-initial{width:18px;height:18px}.meta-freshness{font-size:11px}.source-badge{padding:3px 8px;font-size:11px}.source-badge img,.source-badge-icon{width:14px;height:14px}.hero-figure{padding:0;margin:12px 0}.hero-img{border-radius:0}.hero-caption{padding:8px 16px 0}.video-player-wrapper{padding:0}.video-player-container{border-radius:0}.article-key-points{margin:0 16px 16px;padding:12px 16px}.key-points-list li{font-size:13px}.article-body{padding:0 16px;font-size:calc(1.125rem * var(--font-scale));line-height:1.75}.article-body h2{font-size:1.25rem}.article-body h3{font-size:1.125rem}.author-card{margin:24px 16px;padding:16px;gap:12px}.author-card-avatar img,.author-card-img{width:60px;height:60px}.author-card-name{font-size:15px}.author-card-bio{font-size:13px;-webkit-line-clamp:3;display:-webkit-box;-webkit-box-orient:vertical;overflow:hidden}.author-card-footer{flex-wrap:wrap;gap:8px}.engagement-section{padding:0 16px}.cx-item{padding:12px 0}.cx-text{font-size:15px}.read-next{margin-left:16px;margin-right:16px}.item-figure{width:100px;height:68px}.tags{margin:24px 16px 0;padding-top:20px}.source-refs-inline{margin:0 16px}.disclaimer{margin:0 16px}}@media (max-width:375px){.article-title{font-size:1.375rem}.article-lead{font-size:.9375rem}.article-meta{font-size:11px;gap:4px}.meta-trust{font-size:12px;gap:4px}.meta-trust .source-badge{font-size:12px}.meta-trust .source-badge-icon,.meta-trust .source-initial{width:16px;height:16px}.meta-freshness{font-size:10px;gap:4px}.source-badge{font-size:10px;padding:2px 6px}.article-body{font-size:calc(1.0625rem * var(--font-scale))}.author-card{flex-direction:column;align-items:center;text-align:center}.author-card-footer{justify-content:center}.author-card-social{justify-content:center}.item-figure{width:88px;height:60px}.item-title{font-size:14px}.item-meta{font-size:11px}.item-meta .meta-read,.item-meta .meta-read-sep{display:none}.cx-text{font-size:13px}.cx-replies .cx-avatar{width:24px;height:24px;font-size:11px}}@media (max-height:500px) and (orientation:landscape){.article-container{max-width:680px}.article-header{padding-top:8px}.hero-figure{margin:8px 0}.article-key-points{margin-bottom:16px}.author-card{margin:16px}}.comments-show-more,.cx-delete,.cx-edit,.cx-like,.cx-reply,.cx-report,.cx-show-replies,.read-next-item a,.reply-cancel,.reply-submit{-webkit-tap-highlight-color:transparent;touch-action:manipulation}.cx-like,.cx-reply{min-width:44px;min-height:44px}.comments-show-more{min-height:48px}.meta-sep{color:var(--text-muted,#9ca3af);font-size:13px;line-height:1}