:root{--bg-primary: #0f0f0f;--bg-secondary: #1a1a1a;--bg-tertiary: #252525;--bg-hover: #2a2a2a;--text-primary: #ffffff;--text-secondary: #a0a0a0;--text-muted: #666666;--accent: #6366f1;--accent-hover: #5254cc;--accent-light: rgba(99, 102, 241, .1);--border: #2a2a2a;--success: #22c55e;--warning: #f59e0b;--error: #ef4444;--shadow: 0 4px 24px rgba(0, 0, 0, .4);--radius: 12px;--radius-sm: 8px;--transition: all .2s ease}*{margin:0;padding:0;box-sizing:border-box}body{font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;background:var(--bg-primary);color:var(--text-primary);line-height:1.5;-webkit-font-smoothing:antialiased}.app{display:flex;flex-direction:column;height:100vh;overflow:hidden}.header{display:flex;align-items:center;justify-content:space-between;padding:12px 20px;background:var(--bg-secondary);border-bottom:1px solid var(--border);z-index:100}.header-brand{display:flex;align-items:center;gap:10px;font-weight:600;font-size:18px;color:var(--accent)}.header-user{display:flex;align-items:center;gap:12px}.user-nickname{font-size:14px;color:var(--text-secondary)}.main-content{display:flex;flex:1;overflow:hidden}.sidebar{width:300px;background:var(--bg-secondary);border-right:1px solid var(--border);display:flex;flex-direction:column;flex-shrink:0}.group-list{display:flex;flex-direction:column;height:100%}.group-list-header{display:flex;align-items:center;justify-content:space-between;padding:16px 20px;border-bottom:1px solid var(--border)}.group-list-header h2{font-size:14px;font-weight:600;text-transform:uppercase;letter-spacing:.5px;color:var(--text-secondary)}.groups{flex:1;overflow-y:auto;padding:8px}.group-item{display:flex;align-items:center;gap:12px;padding:12px;border-radius:var(--radius-sm);cursor:pointer;transition:var(--transition)}.group-item:hover{background:var(--bg-hover)}.group-item.active{background:var(--accent-light)}.group-item.active .group-name{color:var(--accent)}.group-icon{display:flex;align-items:center;justify-content:center;width:36px;height:36px;background:var(--bg-tertiary);border-radius:var(--radius-sm);color:var(--text-secondary);flex-shrink:0}.group-info{flex:1;min-width:0;display:flex;flex-direction:column;gap:2px}.group-name{font-weight:500;font-size:14px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.group-description{font-size:12px;color:var(--text-muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.chat-container{flex:1;display:flex;flex-direction:column;min-width:0}.chat-room{display:flex;flex-direction:column;height:100%;background:var(--bg-primary)}.chat-header{display:flex;align-items:center;gap:12px;padding:16px 20px;background:var(--bg-secondary);border-bottom:1px solid var(--border)}.chat-header-info{flex:1;min-width:0}.chat-header-info h2{font-size:16px;font-weight:600}.chat-header-info p{font-size:12px;color:var(--text-muted);margin-top:2px}.private-badge{display:flex;align-items:center;gap:4px;padding:4px 10px;background:var(--accent-light);border-radius:20px;font-size:12px;color:var(--accent)}.mobile-back{display:none}.no-group-selected{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:16px;color:var(--text-muted);text-align:center;padding:40px}.no-group-selected svg{opacity:.3}.no-group-selected h2{font-size:20px;color:var(--text-primary)}.no-group-selected p{font-size:14px;max-width:300px}.message-list{flex:1;overflow-y:auto;padding:20px;display:flex;flex-direction:column;gap:4px}.message-group{display:flex;flex-direction:column;gap:4px}.date-divider{display:flex;align-items:center;justify-content:center;margin:16px 0}.date-divider span{padding:4px 12px;background:var(--bg-tertiary);border-radius:12px;font-size:11px;color:var(--text-muted);text-transform:uppercase;letter-spacing:.5px}.message{display:flex;gap:10px;max-width:75%;animation:fadeIn .2s ease}@keyframes fadeIn{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}.message-own{align-self:flex-end;flex-direction:row-reverse}.message-other{align-self:flex-start}.message-avatar{width:32px;height:32px;border-radius:50%;background:var(--accent);display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:600;flex-shrink:0}.message-content{display:flex;flex-direction:column;gap:4px}.message-nickname{font-size:12px;font-weight:500;color:var(--accent);padding-left:4px}.message-bubble{padding:10px 14px;border-radius:16px;position:relative}.message-other .message-bubble{background:var(--bg-tertiary);border-bottom-left-radius:4px}.message-own .message-bubble{background:var(--accent);border-bottom-right-radius:4px}.message-bubble p{font-size:14px;word-break:break-word;white-space:pre-wrap}.message-time{font-size:10px;color:var(--text-muted);display:block;text-align:right;margin-top:4px}.message-own .message-time{color:#fff9}.empty-messages,.loading-state{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;color:var(--text-muted)}.empty-messages svg{opacity:.3}.empty-messages p{font-size:16px;color:var(--text-secondary)}.empty-messages span{font-size:13px}.spinner{width:32px;height:32px;border:3px solid var(--bg-tertiary);border-top-color:var(--accent);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.message-input-container{padding:16px 20px;background:var(--bg-secondary);border-top:1px solid var(--border)}.spam-warning{display:flex;align-items:center;gap:8px;padding:10px 14px;margin-bottom:12px;background:#ef44441a;border:1px solid rgba(239,68,68,.2);border-radius:var(--radius-sm);color:var(--error);font-size:13px}.rate-limit-hint{margin-top:8px;font-size:11px;color:var(--warning);text-align:center}.message-input-form{display:flex;gap:10px}.message-input{flex:1;padding:12px 16px;background:var(--bg-tertiary);border:1px solid var(--border);border-radius:24px;color:var(--text-primary);font-size:14px;font-family:inherit;outline:none;transition:var(--transition)}.message-input:focus{border-color:var(--accent)}.message-input::placeholder{color:var(--text-muted)}.message-input:disabled{opacity:.6;cursor:not-allowed}.btn-send{width:44px;height:44px;border-radius:50%;background:var(--accent);border:none;color:#fff;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:var(--transition);flex-shrink:0}.btn-send:hover:not(:disabled){background:var(--accent-hover);transform:scale(1.05)}.btn-send:disabled{opacity:.5;cursor:not-allowed}.empty-state{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;padding:40px 20px;text-align:center}.empty-state p{color:var(--text-muted);font-size:14px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:10px 20px;border-radius:var(--radius-sm);font-size:14px;font-weight:500;font-family:inherit;cursor:pointer;transition:var(--transition);border:none;outline:none}.btn-primary{background:var(--accent);color:#fff}.btn-primary:hover:not(:disabled){background:var(--accent-hover)}.btn-secondary{background:var(--bg-tertiary);color:var(--text-primary);border:1px solid var(--border)}.btn-secondary:hover:not(:disabled){background:var(--bg-hover)}.btn-icon{width:36px;height:36px;padding:0;background:transparent;border:none;border-radius:var(--radius-sm);color:var(--text-secondary);cursor:pointer;transition:var(--transition)}.btn-icon:hover{background:var(--bg-hover);color:var(--text-primary)}.btn-full{width:100%}.btn:disabled{opacity:.5;cursor:not-allowed}.modal-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:#000c;display:flex;align-items:center;justify-content:center;z-index:1000;padding:20px;animation:fadeIn .2s ease}.modal{background:var(--bg-secondary);border-radius:var(--radius);padding:24px;width:100%;max-width:400px;box-shadow:var(--shadow);animation:slideUp .3s ease}@keyframes slideUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.modal-header{margin-bottom:24px;text-align:center}.modal-header h2{font-size:20px;font-weight:600;margin-bottom:4px}.modal-header p{font-size:14px;color:var(--text-muted)}.modal-actions{display:flex;gap:10px;margin-top:20px}.modal-actions .btn{flex:1}.form-group{margin-bottom:16px}.form-group label{display:block;font-size:13px;font-weight:500;color:var(--text-secondary);margin-bottom:8px}.input{width:100%;padding:12px 16px;background:var(--bg-tertiary);border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--text-primary);font-size:14px;font-family:inherit;outline:none;transition:var(--transition)}.input:focus{border-color:var(--accent)}.input::placeholder{color:var(--text-muted)}.checkbox-label{display:flex;align-items:center;gap:10px;cursor:pointer}.checkbox-label input[type=checkbox]{width:18px;height:18px;accent-color:var(--accent)}.checkbox-label span{font-size:14px;color:var(--text-primary)}.error-text{display:block;margin-top:8px;font-size:12px;color:var(--error)}::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--bg-tertiary);border-radius:3px}::-webkit-scrollbar-thumb:hover{background:var(--text-muted)}@media(max-width:768px){.sidebar{position:absolute;left:0;top:0;bottom:0;width:100%;z-index:50;transform:translate(0);transition:transform .3s ease}.sidebar-hidden{transform:translate(-100%)}.chat-container{position:absolute;left:0;top:0;bottom:0;width:100%;transform:translate(100%);transition:transform .3s ease}.chat-visible{transform:translate(0)}.main-content{position:relative;margin-top:0}.mobile-back{display:flex}.message{max-width:85%}}