:root{--bg-base: #09090b;--bg-panel: #18181b;--bg-hover: #27272a;--border-color: #3f3f46;--accent: #3b82f6;--accent-glow: rgba(59, 130, 246, .4);--text-main: #f4f4f5;--text-muted: #a1a1aa;--msg-me: #2563eb;--msg-them: #27272a;--danger: #ef4444}*{box-sizing:border-box;margin:0;padding:0}body,html{height:100vh;width:100vw;background-color:var(--bg-base);color:var(--text-main);font-family:Inter,system-ui,-apple-system,sans-serif;overflow:hidden}#setup-screen{position:fixed;inset:0;background:var(--bg-base);z-index:1000;display:flex;flex-direction:column;align-items:center;justify-content:center}.auth-box{background:var(--bg-panel);padding:40px;border-radius:16px;border:1px solid var(--border-color);text-align:center;box-shadow:0 10px 30px #00000080;width:90%;max-width:400px}.btn-primary{background:var(--accent);color:#fff;border:none;padding:14px 24px;font-size:15px;font-weight:600;border-radius:8px;cursor:pointer;width:100%;margin-top:20px;transition:all .2s;display:flex;align-items:center;justify-content:center;gap:8px}.btn-primary:hover{box-shadow:0 0 15px var(--accent-glow);transform:translateY(-1px)}.icon-btn{background:transparent;color:var(--text-muted);border:none;padding:8px;border-radius:6px;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .2s}.icon-btn:hover{background:var(--bg-hover);color:var(--text-main)}.avatar{width:40px;height:40px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:16px;color:#fff;flex-shrink:0;box-shadow:0 2px 4px #0003;text-transform:uppercase}#app-layout{display:none;height:100%;width:100%;max-width:1600px;margin:0 auto;flex-direction:row;background:var(--bg-base)}.panel-sidebar{width:340px;background:var(--bg-panel);border-right:1px solid var(--border-color);display:flex;flex-direction:column;flex-shrink:0;position:relative}.sidebar-header{padding:15px 20px;border-bottom:1px solid var(--border-color);display:flex;justify-content:space-between;align-items:center;height:70px}.share-profile-btn{margin:15px;padding:12px;background:#3b82f61a;color:var(--accent);border:1px solid rgba(59,130,246,.3);border-radius:8px;cursor:pointer;font-weight:500;transition:background .2s;display:flex;align-items:center;justify-content:center;gap:8px}.share-profile-btn:hover{background:#3b82f633}.node-list{flex:1;overflow-y:auto;display:flex;flex-direction:column}.node-card{padding:12px 15px;background:transparent;border-bottom:1px solid var(--border-color);cursor:pointer;transition:all .2s;display:flex;align-items:center;gap:15px}.node-card:hover{background:var(--bg-hover)}.node-card.active{background:#3b82f61a;border-left:4px solid var(--accent)}.node-info{flex:1;min-width:0}.node-top-row{display:flex;justify-content:space-between;align-items:center;margin-bottom:4px}.node-name{font-weight:600;font-size:15px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;color:var(--text-main)}.node-time{font-size:11px;color:var(--text-muted)}.node-desc{font-size:13px;color:var(--text-muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;display:flex;align-items:center;gap:4px}.panel-chat{flex:1;background:var(--bg-base);display:flex;flex-direction:column;position:relative}#empty-state{position:absolute;inset:0;background:var(--bg-base);z-index:10;display:flex;flex-direction:column;align-items:center;justify-content:center;color:var(--text-muted)}.chat-header{padding:15px 20px;border-bottom:1px solid var(--border-color);display:flex;justify-content:space-between;align-items:center;background:var(--bg-panel);z-index:5;height:70px}.chat-title-area{display:flex;align-items:center;gap:15px}.chat-title{font-size:16px;font-weight:600;color:var(--text-main)}.chat-subtitle{font-size:12px;color:var(--accent);font-family:monospace}.dropdown-content{display:none;position:absolute;right:20px;top:60px;background-color:var(--bg-panel);min-width:180px;box-shadow:0 8px 20px #00000080;z-index:100;border-radius:8px;border:1px solid var(--border-color);overflow:hidden}.dropdown-content.show{display:block}.dropdown-content a{color:var(--text-main);padding:12px 16px;display:flex;align-items:center;gap:10px;font-size:14px;cursor:pointer;border-bottom:1px solid var(--border-color)}.dropdown-content a:hover{background-color:var(--bg-hover)}#context-menu{display:none;position:fixed;background:var(--bg-panel);border:1px solid var(--border-color);border-radius:8px;box-shadow:0 4px 15px #00000080;z-index:2000;overflow:hidden;min-width:150px}#context-menu.active{display:block}.ctx-item{padding:10px 15px;cursor:pointer;font-size:14px;display:flex;align-items:center;gap:10px;transition:background .2s}.ctx-item:hover{background:var(--bg-hover);color:var(--accent)}.chat-window{flex:1;padding:20px 10%;overflow-y:auto;display:flex;flex-direction:column;gap:8px}.date-separator{align-self:center;background:var(--bg-panel);color:var(--text-muted);font-size:11px;font-weight:600;padding:6px 14px;border-radius:16px;margin:15px 0;border:1px solid var(--border-color);text-transform:uppercase}.msg-container{display:flex;width:100%;margin-bottom:4px;position:relative}.msg-container.me{justify-content:flex-end}.msg-container.them{justify-content:flex-start}.msg-container.first{margin-top:8px}.msg-box{max-width:65%;padding:8px 12px;border-radius:12px;font-size:15px;line-height:1.5;position:relative;word-wrap:break-word;box-shadow:0 2px 5px #0000001a;display:flex;flex-direction:column;user-select:text}.msg-box.me{background:var(--msg-me);color:#fff;border-bottom-right-radius:4px}.msg-box.them{background:var(--msg-them);color:var(--text-main);border-bottom-left-radius:4px;border:1px solid var(--border-color)}.reply-quote{background:#0003;border-left:3px solid var(--accent);padding:6px 10px;border-radius:4px;margin-bottom:6px;font-size:13px;color:#fffc;overflow:hidden;text-overflow:ellipsis;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical}.msg-text{white-space:pre-wrap}.msg-meta{display:flex;justify-content:flex-end;align-items:center;gap:4px;font-size:11px;margin-top:4px;float:right;margin-left:15px}.msg-box.me .msg-meta{color:#fffc}.msg-box.them .msg-meta{color:var(--text-muted)}.chat-input-wrapper{display:flex;flex-direction:column;background:var(--bg-panel);border-top:1px solid var(--border-color)}#reply-preview{display:none;padding:10px 20px;background:var(--bg-hover);border-bottom:1px solid var(--border-color);justify-content:space-between;align-items:center;font-size:13px;color:var(--text-muted)}.chat-input-area{padding:15px 20px;display:flex;gap:15px;align-items:center}.input-field{flex:1;background:var(--bg-base);border:1px solid var(--border-color);padding:14px 20px;border-radius:24px;color:var(--text-main);font-size:15px;outline:none;transition:border .2s}.input-field:focus{border-color:var(--accent)}.btn-send{background:var(--accent);border:none;width:48px;height:48px;border-radius:50%;color:#fff;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .2s}.btn-send:hover:not(:disabled){box-shadow:0 0 15px var(--accent-glow);transform:scale(1.05)}.btn-send:disabled{background:var(--bg-hover);color:var(--text-muted);cursor:not-allowed}.modal-overlay{display:none;position:fixed;inset:0;background:#000c;z-index:3000;align-items:center;justify-content:center;backdrop-filter:blur(4px)}.modal-content{background:var(--bg-panel);width:90%;max-width:450px;border-radius:12px;border:1px solid var(--border-color);overflow:hidden;box-shadow:0 20px 40px #00000080}.modal-header{padding:20px;border-bottom:1px solid var(--border-color);display:flex;justify-content:space-between;align-items:center}.modal-body{padding:20px;display:flex;flex-direction:column;gap:15px}.setting-box{background:var(--bg-base);padding:12px;border-radius:8px;border:1px solid var(--border-color);font-family:monospace;font-size:12px;word-break:break-all;display:flex;justify-content:space-between;align-items:center;gap:10px}.btn-danger{background:#ef44441a;color:var(--danger);border:1px solid rgba(239,68,68,.3);padding:12px;border-radius:8px;font-weight:600;cursor:pointer;text-align:center;transition:all .2s;margin-top:10px}.btn-danger:hover{background:var(--danger);color:#fff}#qrcode img{margin:0 auto;border-radius:8px;padding:10px;background:#fff}@media(max-width:768px){.panel-sidebar{width:100%;position:absolute;z-index:20;height:100%;transition:transform .2s;border-right:none}.panel-sidebar.hidden{transform:translate(-100%)}#btn-mobile-back{display:flex!important;align-items:center;cursor:pointer;color:var(--accent);margin-right:10px}.chat-window{padding:20px 15px}.msg-box{max-width:85%}}#btn-mobile-back{display:none}