*{box-sizing:border-box;margin:0;padding:0}body{color:#1a1a1a;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}a{color:inherit}input:focus{outline-offset:1px;outline:2px solid #1a1a1a}.notif-dropdown{z-index:200;background:#fff;border:1px solid #e8e8e8;border-radius:12px;width:320px;position:absolute;top:calc(100% + 12px);right:-8px;overflow:hidden;box-shadow:0 8px 24px #0000001f}.notif-dropdown-header{border-bottom:1px solid #f0f0f0;justify-content:space-between;align-items:center;padding:14px 16px 10px;font-size:14px;font-weight:700;display:flex}.notif-mark-all{color:#3b82f6;cursor:pointer;background:0 0;border:none;font-size:12px;font-weight:500}.notif-list{max-height:360px;list-style:none;overflow-y:auto}.notif-empty{color:#999;text-align:center;padding:24px 16px;font-size:13px}.notif-item{cursor:pointer;align-items:center;gap:10px;padding:10px 14px;transition:background .1s;display:flex}.notif-item:hover{background:#f9f9f9}.notif-item.unread{background:#f0f7ff}.notif-item.unread:hover{background:#e6f0fc}.notif-avatar{object-fit:cover;border-radius:50%;flex-shrink:0;width:36px;height:36px}.notif-avatar-placeholder{color:#64748b;background:#e2e8f0;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:36px;height:36px;font-size:14px;font-weight:700;display:flex}.notif-body{flex:1;min-width:0}.notif-text{font-size:13px;line-height:1.4;display:block}.notif-time{color:#aaa;margin-top:2px;font-size:11px;display:block}.notif-dot{background:#3b82f6;border-radius:50%;flex-shrink:0;width:8px;height:8px}.notif-footer{text-align:center;color:#3b82f6;cursor:pointer;border-top:1px solid #f0f0f0;padding:10px 16px;font-size:13px;font-weight:500}.notif-footer:hover{background:#f9f9f9}.messages-layout{background:#fff;flex:1;height:100%;display:flex;overflow:hidden}.messages-sidebar{background:#fafafa;border-right:1px solid #e8e8e8;flex-direction:column;width:300px;min-width:300px;display:flex;overflow:hidden}.sidebar-header{border-bottom:1px solid #e8e8e8;justify-content:space-between;align-items:center;padding:16px 16px 12px;display:flex}.sidebar-header h2{font-size:16px;font-weight:700}.new-chat-btn{color:#fff;cursor:pointer;background:#1a1a1a;border:none;border-radius:50%;justify-content:center;align-items:center;width:30px;height:30px;font-size:20px;line-height:1;display:flex}.new-chat-form{border-bottom:1px solid #e8e8e8;flex-direction:column;gap:6px;padding:10px 12px;display:flex}.new-chat-form input{border:1px solid #ddd;border-radius:8px;width:100%;padding:7px 10px;font-size:13px}.new-chat-form button{color:#fff;cursor:pointer;background:#1a1a1a;border:none;border-radius:8px;padding:6px;font-size:13px}.error-text{color:#e53e3e;font-size:12px}.conv-list{flex:1;list-style:none;overflow-y:auto}.conv-empty{color:#999;text-align:center;padding:24px 16px;font-size:13px}.conv-item{cursor:pointer;border-bottom:1px solid #f0f0f0;align-items:center;gap:10px;padding:12px 14px;transition:background .1s;display:flex}.conv-item:hover{background:#f0f0f0}.conv-item.active{background:#efefef}.conv-meta{flex-direction:column;flex:1;gap:2px;min-width:0;display:flex}.conv-name{white-space:nowrap;text-overflow:ellipsis;font-size:13px;font-weight:600;overflow:hidden}.conv-preview{color:#888;white-space:nowrap;text-overflow:ellipsis;font-size:12px;overflow:hidden}.conv-time{color:#aaa;white-space:nowrap;font-size:11px}.messages-thread{flex-direction:column;flex:1;display:flex;overflow:hidden}.thread-empty{color:#aaa;flex:1;justify-content:center;align-items:center;font-size:14px;display:flex}.thread-header{background:#fff;border-bottom:1px solid #e8e8e8;align-items:center;gap:10px;padding:14px 20px;display:flex}.thread-header strong{font-size:15px}.thread-username{color:#888;margin-left:6px;font-size:13px}.thread-messages{flex-direction:column;flex:1;gap:12px;padding:20px;display:flex;overflow-y:auto}.loading-text{color:#aaa;text-align:center;font-size:13px}.message-bubble-wrap{align-items:flex-end;gap:8px;display:flex}.message-bubble-wrap.me{flex-direction:row-reverse}.message-bubble{flex-direction:column;gap:3px;max-width:65%;display:flex}.message-bubble-wrap.me .message-bubble{align-items:flex-end}.message-body{color:#1a1a1a;word-break:break-word;background:#f0f0f0;border-radius:18px;padding:10px 14px;font-size:14px;line-height:1.5}.message-bubble-wrap.me .message-body{color:#fff;background:#1a1a1a}.message-body p{margin:0}.message-body p+p{margin-top:6px}.message-body ul,.message-body ol{padding-left:18px}.message-body code{background:#00000014;border-radius:4px;padding:1px 4px;font-size:12px}.message-bubble-wrap.me .message-body code{background:#fff3}.message-time{color:#bbb;padding:0 4px;font-size:11px}.thread-composer{background:#fff;border-top:1px solid #e8e8e8;flex-direction:column;gap:8px;padding:12px 16px;display:flex}.tiptap-toolbar{gap:4px;display:flex}.toolbar-btn{cursor:pointer;color:#555;background:#fff;border:1px solid #ddd;border-radius:5px;padding:3px 8px;font-size:13px;transition:background .1s}.toolbar-btn:hover{background:#f0f0f0}.toolbar-btn.active{color:#fff;background:#1a1a1a;border-color:#1a1a1a}.tiptap-editor{cursor:text;border:1px solid #e0e0e0;border-radius:10px;min-height:80px;max-height:200px;padding:10px 14px;font-size:14px;line-height:1.6;overflow-y:auto}.tiptap-editor .tiptap{outline:none;min-height:60px}.tiptap-editor .tiptap p.is-editor-empty:first-child:before{content:attr(data-placeholder);color:#aaa;pointer-events:none;float:left;height:0}.composer-footer{justify-content:flex-end;align-items:center;gap:12px;display:flex}.send-hint{color:#bbb;font-size:12px}.send-btn{color:#fff;cursor:pointer;background:#1a1a1a;border:none;border-radius:8px;padding:8px 20px;font-size:14px;font-weight:500}.send-btn:disabled{opacity:.4;cursor:not-allowed}.settings-page{max-width:600px}.settings-title{color:#1a1a1a;margin-bottom:20px;font-size:24px;font-weight:700}.settings-tabs{border-bottom:1px solid #e0e0e0;gap:4px;margin-bottom:24px;display:flex}.settings-tab{cursor:pointer;color:#6b7280;background:0 0;border:none;border-bottom:2px solid #0000;margin-bottom:-1px;padding:8px 18px;font-size:14px;font-weight:500;transition:color .15s,border-color .15s}.settings-tab.active{color:#1a1a1a;border-bottom-color:#1a1a1a}.settings-tab:hover:not(.active){color:#374151}.settings-content{flex-direction:column;gap:24px;display:flex}.settings-section{background:#fff;border:1px solid #e0e0e0;border-radius:12px;padding:24px}.settings-section-title{color:#1a1a1a;margin:0 0 16px;font-size:16px;font-weight:600}.settings-field{flex-direction:column;gap:6px;margin-bottom:14px;display:flex}.settings-field label{color:#374151;font-size:13px;font-weight:500}.settings-field input{border:1px solid #d1d5db;border-radius:8px;outline:none;padding:9px 13px;font-size:14px;transition:border-color .15s}.settings-field input:focus{border-color:#6366f1}.settings-btn{color:#fff;cursor:pointer;background:#1a1a1a;border:none;border-radius:8px;margin-top:4px;padding:9px 20px;font-size:14px;font-weight:600;transition:opacity .15s}.settings-btn:disabled{opacity:.5;cursor:not-allowed}.settings-toggles{flex-direction:column;gap:0;display:flex}.settings-toggle-row{cursor:pointer;border-bottom:1px solid #f3f4f6;justify-content:space-between;align-items:center;padding:14px 0;display:flex}.settings-toggle-row:last-child{border-bottom:none}.settings-toggle-label{color:#1a1a1a;font-size:14px;font-weight:500;display:block}.settings-toggle-desc{color:#9ca3af;margin-top:2px;font-size:12px;display:block}.toggle-switch{cursor:pointer;background:#d1d5db;border-radius:12px;flex-shrink:0;width:42px;height:24px;transition:background .2s;position:relative}.toggle-switch:after{content:"";background:#fff;border-radius:50%;width:18px;height:18px;transition:transform .2s;position:absolute;top:3px;left:3px;box-shadow:0 1px 3px #0003}.toggle-switch.on{background:#6366f1}.toggle-switch.on:after{transform:translate(18px)}.auth-container{justify-content:center;align-items:flex-start;padding:60px 20px;display:flex}.auth-card{background:#fff;border:1px solid #e0e0e0;border-radius:16px;width:100%;max-width:420px;padding:36px}.auth-title{text-align:center;color:#1a1a1a;margin:0 0 8px;font-size:24px;font-weight:700}.auth-error{color:#c00;background:#fff0f0;border:1px solid #fcc;border-radius:8px;margin-bottom:16px;padding:10px 14px;font-size:14px}.auth-field{flex-direction:column;gap:6px;margin-bottom:14px;display:flex}.auth-field label{color:#374151;font-size:13px;font-weight:500}.auth-field input{border:1px solid #d1d5db;border-radius:8px;outline:none;padding:10px 14px;font-size:15px;transition:border-color .15s}.auth-field input:focus{border-color:#1a1a1a}.auth-btn{color:#fff;cursor:pointer;background:#1a1a1a;border:none;border-radius:8px;width:100%;margin-top:4px;padding:12px;font-size:15px;font-weight:600;transition:opacity .15s}.auth-btn:disabled{opacity:.5;cursor:not-allowed}.auth-switch{text-align:center;color:#6b7280;margin-top:20px;font-size:14px}.auth-switch a,.auth-link{color:#1a1a1a;font-weight:600;text-decoration:none}