.auth-container{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:20px;background:radial-gradient(circle at 20% 80%,rgba(99,102,241,.15) 0%,transparent 50%),radial-gradient(circle at 80% 20%,rgba(139,92,246,.1) 0%,transparent 50%),var(--bg-primary)}.auth-card{width:100%;max-width:420px;padding:40px;background:var(--bg-glass);-webkit-backdrop-filter:var(--glass-blur);backdrop-filter:var(--glass-blur);border:1px solid var(--border);border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);animation:slideUp .4s ease}.auth-header{text-align:center;margin-bottom:32px}.auth-logo{font-size:2rem;margin-bottom:8px}.auth-title{font-size:1.5rem;font-weight:600;margin-bottom:8px}.auth-subtitle{color:var(--text-secondary);font-size:.875rem}.auth-form{display:flex;flex-direction:column;gap:20px}.form-group{display:flex;flex-direction:column;gap:8px}.form-label{font-size:.875rem;font-weight:500;color:var(--text-secondary)}.form-input{width:100%;padding:12px 16px;background:var(--bg-secondary);border:1px solid var(--border);border-radius:var(--radius);color:var(--text-primary);font-size:1rem;transition:border-color .2s,box-shadow .2s}.form-input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-light)}.form-input::placeholder{color:var(--text-muted)}.form-error{color:var(--error);font-size:.75rem;margin-top:4px}.auth-button{width:100%;padding:14px 24px;background:var(--accent);color:#fff;border:none;border-radius:var(--radius);font-size:1rem;font-weight:600;transition:background .2s,transform .1s}.auth-button:hover{background:var(--accent-hover)}.auth-button:active{transform:scale(.98)}.auth-button:disabled{opacity:.6;cursor:not-allowed}.auth-footer{text-align:center;margin-top:24px;color:var(--text-secondary);font-size:.875rem}.auth-footer a{color:var(--accent);font-weight:500}.auth-footer a:hover{text-decoration:underline}.auth-error{padding:12px 16px;background:#ef44441a;border:1px solid rgba(239,68,68,.3);border-radius:var(--radius);color:var(--error);font-size:.875rem;text-align:center}.avatar{position:relative;display:inline-flex;align-items:center;justify-content:center;border-radius:50%;background:var(--bg-glass);border:2px solid var(--border);overflow:hidden;flex-shrink:0}.avatar-sm{width:32px;height:32px;font-size:.75rem}.avatar-md{width:40px;height:40px;font-size:.875rem}.avatar-lg{width:56px;height:56px;font-size:1.125rem}.avatar-img{width:100%;height:100%;object-fit:cover}.avatar-initials{color:var(--text-secondary);font-weight:600}.avatar-status{position:absolute;bottom:2px;right:2px;width:10px;height:10px;border-radius:50%;border:2px solid var(--bg-primary)}.avatar-status-online{background:var(--success)}.avatar-status-offline{background:var(--text-secondary)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;border:none;border-radius:var(--radius);font-weight:500;cursor:pointer;transition:all .2s ease;white-space:nowrap}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-sm{padding:.5rem 1rem;font-size:.875rem}.btn-md{padding:.75rem 1.5rem;font-size:1rem}.btn-lg{padding:1rem 2rem;font-size:1.125rem}.btn-primary{background:var(--accent);color:#fff}.btn-primary:hover:not(:disabled){background:var(--accent-hover)}.btn-secondary{background:var(--bg-glass);color:var(--text-primary);border:1px solid var(--border)}.btn-secondary:hover:not(:disabled){background:#ffffff1a}.btn-ghost{background:transparent;color:var(--text-secondary)}.btn-ghost:hover:not(:disabled){color:var(--text-primary);background:var(--bg-glass)}.btn-full{width:100%}.btn-spinner{width:16px;height:16px;border:2px solid transparent;border-top-color:currentColor;border-radius:50%;animation:spin .6s linear infinite}.input-group{display:flex;flex-direction:column;gap:.5rem}.input-label{font-size:.875rem;font-weight:500;color:var(--text-secondary)}.input-field{width:100%;padding:.75rem 1rem;background:var(--bg-glass);border:1px solid var(--border);border-radius:var(--radius);color:var(--text-primary);font-size:1rem;transition:border-color .2s ease,box-shadow .2s ease}.input-field::placeholder{color:var(--text-secondary);opacity:.6}.input-field:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px #6366f133}.input-group.input-error .input-field{border-color:#ef4444}.input-error-text{font-size:.75rem;color:#ef4444}.chat-layout{display:flex;height:100vh;background:var(--bg-primary)}.sidebar{width:320px;display:flex;flex-direction:column;background:var(--bg-secondary);border-right:1px solid var(--border)}.sidebar-header{display:flex;align-items:center;justify-content:center;padding:1rem;border-bottom:1px solid var(--border);height:64px;box-sizing:border-box}.sidebar-username{font-weight:600;color:var(--text-primary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:150px}.sidebar-conversations{flex:1;overflow-y:auto;padding:.5rem}.sidebar-loading,.sidebar-empty{display:flex;flex-direction:column;align-items:center;justify-content:center;height:200px;color:var(--text-secondary);text-align:center;padding:1rem}.sidebar-empty-hint{font-size:.875rem;opacity:.7;margin-top:.5rem}.sidebar-footer{display:flex;align-items:center;justify-content:space-between;padding:1rem;border-top:1px solid var(--border);height:66px;box-sizing:border-box}.sidebar-user-info{display:flex;align-items:center;gap:.75rem;flex:1;min-width:0}.sidebar-settings{position:relative}.settings-btn{background:transparent;border:none;font-size:1.25rem;cursor:pointer;padding:.5rem;border-radius:var(--radius);transition:background .2s ease}.settings-btn:hover{background:var(--bg-glass)}.settings-dropdown{position:absolute;bottom:100%;right:0;margin-bottom:.5rem;background:var(--bg-secondary);border:1px solid var(--border);border-radius:var(--radius);min-width:140px;box-shadow:var(--shadow);animation:slideUp .15s ease;z-index:50}.settings-dropdown-item{display:block;width:100%;padding:.75rem 1rem;background:transparent;border:none;color:var(--text-primary);font-size:.875rem;text-align:left;cursor:pointer;transition:background .2s ease}.settings-dropdown-item:hover{background:var(--bg-glass)}.conversation-item{display:flex;align-items:center;gap:.75rem;padding:.75rem;border-radius:var(--radius);cursor:pointer;transition:background .2s ease}.conversation-item:hover{background:var(--bg-glass)}.conversation-item-active{background:#6366f126}.conversation-info{flex:1;min-width:0}.conversation-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:.25rem}.conversation-name{font-weight:500;color:var(--text-primary)}.conversation-time{font-size:.75rem;color:var(--text-secondary)}.conversation-preview{font-size:.875rem;color:var(--text-secondary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;margin:0}.chat-main{flex:1;display:flex;flex-direction:column;min-width:0}.chat-header{display:flex;align-items:center;justify-content:space-between;padding:1rem 1.5rem;background:var(--bg-secondary);border-bottom:1px solid var(--border);height:64px;box-sizing:border-box}.chat-header-user h2{margin:0;font-size:1.125rem}.chat-header-status{font-size:.75rem;color:var(--text-secondary);text-transform:capitalize}.chat-empty{flex:1;display:flex;align-items:center;justify-content:center}.chat-empty-content{text-align:center;color:var(--text-secondary)}.chat-empty-icon{font-size:4rem;margin-bottom:1rem;display:block}.chat-empty-content h2{margin:0 0 .5rem;color:var(--text-primary)}.message-list{flex:1;overflow-y:auto;padding:1rem 1.5rem;display:flex;flex-direction:column;gap:.75rem}.message-list-loadmore{text-align:center;padding:.5rem}.message-list-loading,.message-list-empty{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;color:var(--text-secondary);text-align:center}.message-list-hint{font-size:.875rem;opacity:.7;margin-top:.5rem}.message-bubble{display:flex;align-items:flex-end;gap:.5rem;max-width:70%}.message-sent{align-self:flex-end;flex-direction:row-reverse}.message-received{align-self:flex-start}.message-content{padding:.75rem 1rem;border-radius:var(--radius);position:relative}.message-sent .message-content{background:var(--accent);color:#fff;border-bottom-right-radius:4px}.message-received .message-content{background:var(--bg-glass);border:1px solid var(--border);border-bottom-left-radius:4px}.message-text{margin:0;line-height:1.4;word-break:break-word}.message-time{display:block;font-size:.65rem;opacity:.7;margin-top:.25rem;text-align:right}.message-input{display:flex;gap:.75rem;padding:1rem 1.5rem;background:var(--bg-secondary);border-top:1px solid var(--border);height:66px;box-sizing:border-box}.message-input-field{flex:1;padding:.75rem 1rem;background:var(--bg-glass);border:1px solid var(--border);border-radius:var(--radius);color:var(--text-primary);font-size:1rem}.message-input-field::placeholder{color:var(--text-secondary);opacity:.6}.message-input-field:focus{outline:none;border-color:var(--accent)}.message-send-btn{display:flex;align-items:center;justify-content:center;min-width:44px;height:44px;padding:0;background:var(--accent);border:none;border-radius:var(--radius);color:#fff;font-size:1.25rem;cursor:pointer;transition:background .2s ease}.message-send-btn:hover:not(:disabled){background:var(--accent-hover)}.message-send-btn:disabled{opacity:.5;cursor:not-allowed}.modal-overlay{position:fixed;inset:0;background:#000000b3;display:flex;align-items:center;justify-content:center;z-index:100;animation:fadeIn .2s ease}.modal{background:var(--bg-secondary);border:1px solid var(--border);border-radius:var(--radius);width:100%;max-width:400px;max-height:80vh;display:flex;flex-direction:column;animation:slideUp .2s ease}.modal-header{display:flex;align-items:center;justify-content:space-between;padding:1rem 1.5rem;border-bottom:1px solid var(--border)}.modal-header h2{margin:0;font-size:1.25rem}.modal-close{background:none;border:none;color:var(--text-secondary);font-size:1.5rem;cursor:pointer;padding:0;line-height:1}.modal-close:hover{color:var(--text-primary)}.modal-body{padding:1rem 1.5rem;overflow-y:auto;flex:1}.modal-footer{padding:1rem 1.5rem;border-top:1px solid var(--border);display:flex;justify-content:flex-end;gap:.75rem}.user-list{margin-top:1rem;max-height:300px;overflow-y:auto}.user-list-loading,.user-list-empty{padding:2rem;text-align:center;color:var(--text-secondary)}.user-list-item{display:flex;align-items:center;gap:.75rem;padding:.75rem;border-radius:var(--radius);cursor:pointer;transition:background .2s ease}.user-list-item:hover{background:var(--bg-glass)}.user-list-name{font-weight:500;color:var(--text-primary)}@keyframes slideUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}:root{--bg-primary: #0a0a0f;--bg-secondary: #12121a;--bg-tertiary: #1a1a24;--bg-glass: rgba(255, 255, 255, .05);--accent: #6366f1;--accent-hover: #818cf8;--accent-light: rgba(99, 102, 241, .15);--text-primary: #ffffff;--text-secondary: #a1a1aa;--text-muted: #71717a;--border: rgba(255, 255, 255, .1);--border-focus: rgba(99, 102, 241, .5);--success: #22c55e;--error: #ef4444;--warning: #eab308;--glass-blur: blur(20px);--shadow: 0 8px 32px rgba(0, 0, 0, .3);--shadow-lg: 0 16px 48px rgba(0, 0, 0, .4);--radius-sm: 8px;--radius: 12px;--radius-lg: 16px;--radius-full: 9999px;--font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{font-size:16px;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{font-family:var(--font-sans);background-color:var(--bg-primary);color:var(--text-primary);line-height:1.5;min-height:100vh}a{color:var(--accent);text-decoration:none}a:hover{color:var(--accent-hover)}button{cursor:pointer;font-family:inherit}input,textarea{font-family:inherit}.glass{background:var(--bg-glass);-webkit-backdrop-filter:var(--glass-blur);backdrop-filter:var(--glass-blur);border:1px solid var(--border)}.text-muted{color:var(--text-secondary)}.text-center{text-align:center}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:var(--bg-secondary)}::-webkit-scrollbar-thumb{background:var(--bg-tertiary);border-radius:var(--radius-full)}::-webkit-scrollbar-thumb:hover{background:var(--text-muted)}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes slideUp{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}@keyframes pulse{0%,to{opacity:1}50%{opacity:.5}}