*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{--primary: #2563eb;--primary-hover: #1d4ed8;--primary-light: #eff6ff;--primary-text: #1e40af;--surface: #ffffff;--sidebar-bg: #f8fafc;--sidebar-hover: #f1f5f9;--sidebar-active: #e0eaff;--sidebar-active-text: #1e40af;--border: #e2e8f0;--border-light: #f1f5f9;--text-primary: #0f172a;--text-secondary: #64748b;--text-muted: #94a3b8;--bubble-me: #2563eb;--bubble-me-text: #ffffff;--bubble-them: #f1f5f9;--bubble-them-text: #0f172a;--danger: #ef4444;--success: #22c55e;--radius-sm: 6px;--radius-md: 12px;--radius-lg: 20px;--shadow-sm: 0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.04);--shadow-md: 0 4px 12px rgba(0,0,0,.1);--shadow-lg: 0 20px 40px rgba(0,0,0,.12);font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased}html,body,#root{height:100%;overflow:hidden}button{font-family:inherit;cursor:pointer}input,textarea{font-family:inherit}.login-root{min-height:100vh;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#f0f4ff,#fafbff,#f0f9ff);padding:24px}.login-card{width:100%;max-width:400px;background:var(--surface);border-radius:20px;box-shadow:var(--shadow-lg);padding:48px 40px;border:1px solid var(--border-light)}.login-brand{font-size:2.2rem;font-weight:700;letter-spacing:-.5px;margin-bottom:8px;text-align:center}.login-brand-cata{color:var(--text-primary)}.login-brand-chat{color:var(--primary)}.login-subtitle{text-align:center;font-size:14px;color:var(--text-secondary);margin-bottom:32px}.login-form{display:flex;flex-direction:column;gap:16px}.login-field{display:flex;flex-direction:column;gap:6px}.login-field label{font-size:13px;font-weight:500;color:var(--text-primary)}.login-field input{padding:10px 14px;border:1.5px solid var(--border);border-radius:var(--radius-sm);font-size:15px;color:var(--text-primary);background:var(--surface);transition:border-color .15s;outline:none}.login-field input:focus{border-color:var(--primary);box-shadow:0 0 0 3px #2563eb1a}.login-field input:disabled{opacity:.6}.login-remember{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--text-secondary);cursor:pointer;-webkit-user-select:none;user-select:none}.login-remember input[type=checkbox]{width:15px;height:15px;accent-color:var(--primary);cursor:pointer}.login-error{padding:10px 14px;background:#fef2f2;border:1px solid #fecaca;border-radius:var(--radius-sm);font-size:13px;color:var(--danger)}.login-btn{width:100%;padding:12px;background:var(--primary);color:#fff;border:none;border-radius:var(--radius-sm);font-size:15px;font-weight:600;transition:background .15s,transform .1s;display:flex;align-items:center;justify-content:center;min-height:46px}.login-btn:hover:not(:disabled){background:var(--primary-hover)}.login-btn:active:not(:disabled){transform:scale(.99)}.login-btn:disabled{opacity:.5;cursor:not-allowed}.login-spinner{width:18px;height:18px;border:2px solid rgba(255,255,255,.35);border-top-color:#fff;border-radius:50%;animation:spin .7s linear infinite;display:inline-block}.login-footer{margin-top:24px;text-align:center;font-size:13px;color:var(--text-secondary)}.login-footer a{color:var(--primary);text-decoration:none;font-weight:500}.login-footer a:hover{text-decoration:underline}.ncd-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#0006;-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px);z-index:200;animation:fadeIn .15s ease}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}.ncd-content{position:fixed;top:50%;left:50%;transform:translate(-50%,-50%);width:100%;max-width:420px;background:var(--surface);border-radius:16px;box-shadow:var(--shadow-lg);padding:24px;z-index:201;animation:slideIn .18s ease}@keyframes slideIn{0%{opacity:0;transform:translate(-50%,-48%)}to{opacity:1;transform:translate(-50%,-50%)}}.ncd-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:6px}.ncd-title{font-size:17px;font-weight:700;color:var(--text-primary)}.ncd-close{display:flex;align-items:center;justify-content:center;width:28px;height:28px;border:none;border-radius:var(--radius-sm);background:transparent;color:var(--text-secondary);cursor:pointer;transition:background .12s}.ncd-close:hover{background:var(--sidebar-hover)}.ncd-subtitle{font-size:13px;color:var(--text-secondary);margin-bottom:20px}.ncd-form{display:flex;gap:8px;margin-bottom:16px}.ncd-input-wrap{flex:1;position:relative}.ncd-input-wrap input{width:100%;padding:10px 12px 10px 34px;border:1.5px solid var(--border);border-radius:var(--radius-sm);font-size:14px;color:var(--text-primary);outline:none;transition:border-color .15s}.ncd-input-wrap input:focus{border-color:var(--primary);box-shadow:0 0 0 3px #2563eb14}.ncd-search-icon{position:absolute;left:10px;top:50%;transform:translateY(-50%);color:var(--text-muted);pointer-events:none}.ncd-search-btn{padding:10px 18px;background:var(--primary);color:#fff;border:none;border-radius:var(--radius-sm);font-size:14px;font-weight:600;cursor:pointer;transition:background .15s;white-space:nowrap;display:flex;align-items:center;justify-content:center;min-width:76px}.ncd-search-btn:hover:not(:disabled){background:var(--primary-hover)}.ncd-search-btn:disabled{opacity:.5;cursor:not-allowed}.ncd-spinner{width:16px;height:16px;border:2px solid rgba(255,255,255,.35);border-top-color:#fff;border-radius:50%;animation:spin .7s linear infinite;display:inline-block}@keyframes spin{to{transform:rotate(360deg)}}.ncd-not-found{padding:12px 16px;background:#fef2f2;border:1px solid #fecaca;border-radius:var(--radius-sm);font-size:13px;color:var(--danger)}.ncd-result{display:flex;align-items:center;justify-content:space-between;padding:12px 14px;background:var(--primary-light);border:1px solid #bfdbfe;border-radius:var(--radius-md)}.ncd-result-info{display:flex;align-items:center;gap:8px}.ncd-person-icon{color:var(--primary)}.ncd-result-name{font-size:14px;font-weight:600;color:var(--text-primary)}.ncd-start-btn{padding:7px 18px;background:var(--primary);color:#fff;border:none;border-radius:20px;font-size:13px;font-weight:600;cursor:pointer;transition:background .15s}.ncd-start-btn:hover{background:var(--primary-hover)}.sidebar{display:flex;flex-direction:column;width:280px;min-width:280px;height:100vh;background:var(--sidebar-bg);border-right:1px solid var(--border);overflow:hidden}.sidebar-header{display:flex;align-items:center;justify-content:space-between;padding:18px 16px 14px;border-bottom:1px solid var(--border-light)}.sidebar-brand{display:flex;align-items:center;gap:8px;color:var(--primary)}.sidebar-brand-text{font-size:18px;font-weight:700;letter-spacing:-.3px}.brand-cata{color:var(--text-primary)}.brand-chat{color:var(--primary)}.sidebar-search{position:relative;padding:10px 12px;border-bottom:1px solid var(--border-light)}.sidebar-search input{width:100%;padding:8px 12px 8px 32px;border:1.5px solid var(--border);border-radius:20px;font-size:13px;color:var(--text-primary);background:var(--surface);outline:none;transition:border-color .15s}.sidebar-search input:focus{border-color:var(--primary);box-shadow:0 0 0 3px #2563eb14}.search-icon{position:absolute;left:22px;top:50%;transform:translateY(-50%);color:var(--text-muted);pointer-events:none}.sidebar-list{flex:1;overflow-y:auto;padding:6px 0}.sidebar-list::-webkit-scrollbar{width:4px}.sidebar-list::-webkit-scrollbar-track{background:transparent}.sidebar-list::-webkit-scrollbar-thumb{background:var(--border);border-radius:2px}.conv-item--broadcast{border-bottom:1px solid var(--border-light)}.avatar--broadcast{background:linear-gradient(135deg,#f59e0b,#d97706);border-radius:50%;display:flex;align-items:center;justify-content:center;color:#fff;flex-shrink:0}.conv-time--pinned{font-size:11px;font-weight:600;color:#f59e0b;text-transform:uppercase;letter-spacing:.3px}.conv-item{display:flex;align-items:center;gap:12px;width:100%;padding:10px 14px;border:none;background:transparent;text-align:left;cursor:pointer;transition:background .12s;border-radius:0}.conv-item:hover{background:var(--sidebar-hover)}.conv-item--active{background:var(--sidebar-active)!important}.conv-info{flex:1;min-width:0;display:flex;justify-content:space-between;align-items:center;gap:8px}.conv-name{font-size:14px;font-weight:600;color:var(--text-primary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.conv-item--active .conv-name{color:var(--sidebar-active-text)}.conv-time{font-size:11px;color:var(--text-muted);white-space:nowrap;flex-shrink:0}.avatar{border-radius:50%;display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;flex-shrink:0;-webkit-user-select:none;user-select:none}.sidebar-empty{padding:32px 16px;text-align:center;color:var(--text-muted);font-size:13px;display:flex;flex-direction:column;gap:12px;align-items:center}.new-chat-hint{padding:8px 16px;background:var(--primary-light);color:var(--primary);border:none;border-radius:20px;font-size:13px;font-weight:600;cursor:pointer;transition:background .15s}.new-chat-hint:hover{background:#dbeafe}.list-skeleton{height:62px;background:linear-gradient(90deg,#f1f5f9 25%,#e8edf2,#f1f5f9 75%);background-size:200% 100%;animation:shimmer 1.4s infinite;border-radius:0;margin:2px 0}.sidebar-footer{display:flex;align-items:center;gap:10px;padding:12px 14px;border-top:1px solid var(--border-light);background:var(--sidebar-bg)}.footer-username{flex:1;font-size:13px;font-weight:600;color:var(--text-primary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.icon-btn{display:flex;align-items:center;justify-content:center;width:32px;height:32px;border:none;border-radius:var(--radius-sm);background:transparent;color:var(--text-secondary);cursor:pointer;transition:background .12s,color .12s;flex-shrink:0}.icon-btn:hover{background:var(--sidebar-hover);color:var(--text-primary)}.icon-btn--danger:hover{background:#fef2f2;color:var(--danger)}.cw-root{flex:1;display:flex;flex-direction:column;height:100vh;overflow:hidden;background:var(--surface)}.cw-empty{align-items:center;justify-content:center}.cw-empty-content{text-align:center;color:var(--text-muted);display:flex;flex-direction:column;align-items:center;gap:12px}.cw-empty-icon{color:var(--border);margin-bottom:4px}.cw-empty-content h2{font-size:18px;font-weight:600;color:var(--text-secondary)}.cw-empty-content p{font-size:14px}.cw-header{display:flex;align-items:center;gap:12px;padding:14px 20px;border-bottom:1px solid var(--border);background:var(--surface);box-shadow:var(--shadow-sm);z-index:1}.cw-avatar{border-radius:50%;display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;flex-shrink:0;-webkit-user-select:none;user-select:none}.cw-avatar--broadcast{background:linear-gradient(135deg,#f59e0b,#d97706)!important;display:flex;align-items:center;justify-content:center;color:#fff}.cw-header-info{display:flex;flex-direction:column}.cw-header-name{font-size:15px;font-weight:600;color:var(--text-primary)}.cw-header-sub{font-size:12px;color:var(--text-muted);margin-top:1px}.msg-sender-name{font-size:11px;font-weight:600;color:var(--text-secondary);margin-bottom:2px;padding:0 4px}.cw-readonly-bar{display:flex;align-items:center;justify-content:center;gap:6px;padding:14px;border-top:1px solid var(--border);background:var(--sidebar-bg);font-size:13px;color:var(--text-muted);font-style:italic}.cw-messages{flex:1;overflow-y:auto;padding:20px 20px 12px;display:flex;flex-direction:column;gap:4px}.cw-messages::-webkit-scrollbar{width:4px}.cw-messages::-webkit-scrollbar-track{background:transparent}.cw-messages::-webkit-scrollbar-thumb{background:var(--border);border-radius:2px}.cw-loading{display:flex;flex-direction:column;gap:12px;padding-top:8px}.msg-skeleton{height:40px;width:55%;border-radius:18px;background:linear-gradient(90deg,#f1f5f9 25%,#e8edf2,#f1f5f9 75%);background-size:200% 100%;animation:shimmer 1.4s infinite}.msg-skeleton--me{align-self:flex-end}.msg-skeleton--them{align-self:flex-start}@keyframes shimmer{0%{background-position:200% 0}to{background-position:-200% 0}}.cw-no-msgs{flex:1;display:flex;align-items:center;justify-content:center;color:var(--text-muted);font-size:14px}.msg-row{display:flex;align-items:flex-end;gap:8px;margin:1px 0}.msg-row--me{flex-direction:row-reverse}.msg-avatar-slot{width:30px;flex-shrink:0;align-self:flex-end}.msg-bubble-wrap{display:flex;flex-direction:column;max-width:65%}.msg-row--me .msg-bubble-wrap{align-items:flex-end}.msg-bubble{padding:9px 14px;font-size:14px;line-height:1.5;word-break:break-word;white-space:pre-wrap}.msg-bubble--me{background:var(--bubble-me);color:var(--bubble-me-text);border-radius:18px 18px 4px}.msg-bubble--them{background:var(--bubble-them);color:var(--bubble-them-text);border-radius:18px 18px 18px 4px}.msg-time{font-size:11px;color:var(--text-muted);margin-top:3px;padding:0 4px}.cw-input-bar{display:flex;align-items:flex-end;gap:10px;padding:14px 16px;border-top:1px solid var(--border);background:var(--surface)}.cw-textarea{flex:1;padding:10px 14px;border:1.5px solid var(--border);border-radius:22px;font-size:14px;line-height:1.5;resize:none;outline:none;color:var(--text-primary);background:var(--sidebar-bg);min-height:42px;max-height:120px;overflow-y:auto;transition:border-color .15s}.cw-textarea:focus{border-color:var(--primary);background:var(--surface);box-shadow:0 0 0 3px #2563eb14}.cw-send-btn{display:flex;align-items:center;justify-content:center;width:40px;height:40px;border-radius:50%;border:none;background:var(--border);color:#fff;flex-shrink:0;transition:background .15s,transform .1s}.cw-send-btn--active{background:var(--primary)}.cw-send-btn--active:hover{background:var(--primary-hover)}.cw-send-btn:active:not(:disabled){transform:scale(.92)}.cw-send-btn:disabled{cursor:not-allowed}.chat-root{display:flex;height:100vh;overflow:hidden;background:var(--surface)}