:root{--bg-base: #0f0f13;--bg-surface: #17171d;--bg-elevated: #1f1f28;--bg-input: #26262f;--bg-hover: #2c2c38;--bg-active: #33334a;--border: #2e2e3a;--border-light: #3a3a4a;--accent: #6c3ef4;--accent-dim: #5530d4;--accent-glow: rgba(108,62,244,.18);--accent-text: #a78bfa;--text-primary: #f0eeff;--text-secondary: #9896b0;--text-muted: #6b6983;--text-inverse: #ffffff;--green: #22c55e;--red: #ef4444;--amber: #f59e0b;--blue: #3b82f6;--radius-sm: 6px;--radius-md: 10px;--radius-lg: 14px;--radius-xl: 20px;--radius-full: 9999px;--font-sans: "Inter", system-ui, -apple-system, sans-serif;--font-mono: "JetBrains Mono", "Fira Code", monospace;--shadow-sm: 0 1px 3px rgba(0,0,0,.4);--shadow-md: 0 4px 16px rgba(0,0,0,.5);--shadow-lg: 0 8px 32px rgba(0,0,0,.6);--sidebar-w: 280px;--transition: .15s ease}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html,body{height:100%;overflow:hidden}body{font-family:var(--font-sans);font-size:14px;color:var(--text-primary);background:var(--bg-base);line-height:1.5;-webkit-font-smoothing:antialiased}button{font-family:inherit;cursor:pointer;border:none;background:none}input,textarea{font-family:inherit}a{color:var(--accent-text);text-decoration:none}a:hover{text-decoration:underline}img{display:block;max-width:100%}ul,ol{list-style:none}:focus-visible{outline:2px solid var(--accent);outline-offset:2px}::-webkit-scrollbar{width:4px;height:4px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--border-light);border-radius:var(--radius-full)}::-webkit-scrollbar-thumb:hover{background:var(--text-muted)}#app{display:flex;height:100vh;width:100vw;overflow:hidden}.auth-screen{display:flex;align-items:center;justify-content:center;width:100%;height:100%;background:var(--bg-base);position:relative;overflow:hidden}.auth-screen:before{content:"";position:absolute;top:-200px;left:50%;transform:translate(-50%);width:600px;height:600px;background:radial-gradient(circle,rgba(108,62,244,.12) 0%,transparent 70%);pointer-events:none}.auth-card{background:var(--bg-surface);border:1px solid var(--border);border-radius:var(--radius-xl);padding:40px 44px;width:100%;max-width:420px;box-shadow:var(--shadow-lg);position:relative;z-index:1}.auth-logo{display:flex;align-items:center;gap:10px;margin-bottom:32px}.auth-logo-icon{width:40px;height:40px;background:var(--accent);border-radius:var(--radius-md);display:flex;align-items:center;justify-content:center}.auth-logo-icon svg{width:22px;height:22px;color:#fff}.auth-logo-text{font-size:22px;font-weight:600;color:var(--text-primary);letter-spacing:-.3px}.auth-logo-badge{font-size:10px;font-weight:600;background:var(--accent-glow);color:var(--accent-text);border:1px solid rgba(108,62,244,.3);padding:2px 6px;border-radius:var(--radius-full);letter-spacing:.5px;text-transform:uppercase}.auth-title{font-size:20px;font-weight:600;color:var(--text-primary);margin-bottom:6px;letter-spacing:-.2px}.auth-subtitle{font-size:13px;color:var(--text-secondary);margin-bottom:28px;line-height:1.6}.form-group{margin-bottom:16px}.form-label{display:block;font-size:12px;font-weight:500;color:var(--text-secondary);margin-bottom:6px;text-transform:uppercase;letter-spacing:.5px}.form-input{width:100%;background:var(--bg-input);border:1px solid var(--border);border-radius:var(--radius-md);padding:10px 14px;font-size:14px;color:var(--text-primary);transition:border-color var(--transition),box-shadow var(--transition)}.form-input:hover{border-color:var(--border-light)}.form-input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-glow)}.form-input::placeholder{color:var(--text-muted)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:10px 18px;border-radius:var(--radius-md);font-size:14px;font-weight:500;transition:all var(--transition);cursor:pointer}.btn-primary{background:var(--accent);color:#fff;width:100%;padding:12px;margin-top:8px}.btn-primary:hover{background:var(--accent-dim)}.btn-primary:active{transform:scale(.99)}.btn-primary:disabled{opacity:.5;cursor:not-allowed;transform:none}.btn-ghost{color:var(--text-secondary);background:transparent;border:1px solid var(--border)}.btn-ghost:hover{background:var(--bg-hover);color:var(--text-primary);border-color:var(--border-light)}.auth-error{margin-top:14px;padding:10px 14px;background:#ef44441a;border:1px solid rgba(239,68,68,.25);border-radius:var(--radius-md);color:#fca5a5;font-size:13px;display:none}.auth-error.visible{display:block}.auth-server-hint{margin-top:20px;padding-top:20px;border-top:1px solid var(--border);text-align:center;font-size:12px;color:var(--text-muted)}.auth-server-hint span{color:var(--text-secondary)}.spinner{width:16px;height:16px;border:2px solid rgba(255,255,255,.3);border-top-color:#fff;border-radius:50%;animation:spin .7s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.app-layout{display:flex;width:100%;height:100vh;overflow:hidden}.sidebar{width:var(--sidebar-w);min-width:var(--sidebar-w);background:var(--bg-surface);border-right:1px solid var(--border);display:flex;flex-direction:column;overflow:hidden}.sidebar-header{padding:16px 16px 12px;border-bottom:1px solid var(--border)}.sidebar-brand{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px}.sidebar-brand-name{display:flex;align-items:center;gap:8px;font-size:15px;font-weight:600;color:var(--text-primary)}.sidebar-brand-icon{width:28px;height:28px;background:var(--accent);border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center}.sidebar-brand-icon svg{width:16px;height:16px;color:#fff}.sidebar-actions{display:flex;align-items:center;gap:6px}.icon-btn{width:30px;height:30px;display:flex;align-items:center;justify-content:center;border-radius:var(--radius-sm);color:var(--text-secondary);transition:all var(--transition);cursor:pointer}.icon-btn:hover{background:var(--bg-hover);color:var(--text-primary)}.icon-btn svg{width:16px;height:16px}.search-box{position:relative;display:flex;align-items:center}.search-box svg{position:absolute;left:10px;width:14px;height:14px;color:var(--text-muted);pointer-events:none}.search-input{width:100%;background:var(--bg-input);border:1px solid var(--border);border-radius:var(--radius-md);padding:7px 10px 7px 32px;font-size:13px;color:var(--text-primary);transition:border-color var(--transition)}.search-input:focus{outline:none;border-color:var(--accent)}.search-input::placeholder{color:var(--text-muted)}.room-list{flex:1;overflow-y:auto;padding:8px}.room-list-section{margin-bottom:8px}.room-list-section-header{display:flex;align-items:center;justify-content:space-between;padding:6px 8px 4px;font-size:11px;font-weight:600;color:var(--text-muted);text-transform:uppercase;letter-spacing:.7px}.room-item{display:flex;align-items:center;gap:10px;padding:8px 10px;border-radius:var(--radius-md);cursor:pointer;transition:background var(--transition);position:relative;min-height:52px}.room-item:hover{background:var(--bg-hover)}.room-item.active{background:var(--bg-active)}.room-item.active .room-name{color:var(--text-primary)}.room-avatar{width:36px;height:36px;min-width:36px;border-radius:var(--radius-md);background:var(--bg-elevated);display:flex;align-items:center;justify-content:center;font-size:14px;font-weight:600;color:var(--text-secondary);position:relative;overflow:hidden}.room-avatar.dm{border-radius:50%}.room-avatar img{width:100%;height:100%;object-fit:cover;border-radius:inherit}.room-avatar-text{font-size:13px;font-weight:600}.room-presence{position:absolute;bottom:1px;right:1px;width:9px;height:9px;background:var(--green);border:2px solid var(--bg-surface);border-radius:50%}.room-info{flex:1;min-width:0}.room-name-row{display:flex;align-items:center;justify-content:space-between;gap:6px;margin-bottom:2px}.room-name{font-size:13px;font-weight:500;color:var(--text-secondary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.room-item.active .room-name,.room-item.unread .room-name{color:var(--text-primary);font-weight:600}.room-time{font-size:11px;color:var(--text-muted);white-space:nowrap;flex-shrink:0}.room-preview{font-size:12px;color:var(--text-muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.room-item.unread .room-preview{color:var(--text-secondary)}.unread-badge{min-width:18px;height:18px;background:var(--accent);border-radius:var(--radius-full);display:flex;align-items:center;justify-content:center;font-size:10px;font-weight:600;color:#fff;padding:0 5px;flex-shrink:0}.room-encrypt-icon{width:12px;height:12px;color:var(--accent-text);flex-shrink:0}.sidebar-footer{padding:12px;border-top:1px solid var(--border)}.user-profile{display:flex;align-items:center;gap:10px;padding:8px;border-radius:var(--radius-md);cursor:pointer;transition:background var(--transition);position:relative}.user-profile:hover{background:var(--bg-hover)}.user-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;color:#fff;flex-shrink:0;position:relative}.user-avatar-presence{position:absolute;bottom:0;right:0;width:9px;height:9px;background:var(--green);border:2px solid var(--bg-surface);border-radius:50%}.user-info{flex:1;min-width:0}.user-name{font-size:13px;font-weight:600;color:var(--text-primary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.user-status{font-size:11px;color:var(--text-muted)}.user-profile-actions{display:flex;gap:2px}.profile-dropdown{position:absolute;bottom:calc(100% + 8px);left:8px;right:8px;background:var(--bg-elevated);border:1px solid var(--border-light);border-radius:var(--radius-lg);padding:8px;box-shadow:var(--shadow-lg);z-index:100;display:none}.profile-dropdown.visible{display:block}.dropdown-item{display:flex;align-items:center;gap:10px;padding:9px 10px;border-radius:var(--radius-sm);font-size:13px;color:var(--text-secondary);cursor:pointer;transition:all var(--transition)}.dropdown-item:hover{background:var(--bg-hover);color:var(--text-primary)}.dropdown-item svg{width:15px;height:15px;flex-shrink:0}.dropdown-item.danger{color:#fca5a5}.dropdown-item.danger:hover{background:#ef44441a}.dropdown-divider{height:1px;background:var(--border);margin:6px 0}.chat-area{flex:1;display:flex;flex-direction:column;overflow:hidden;background:var(--bg-base)}.chat-header{display:flex;align-items:center;justify-content:space-between;padding:14px 20px;border-bottom:1px solid var(--border);background:var(--bg-surface);flex-shrink:0}.chat-header-left{display:flex;align-items:center;gap:12px;min-width:0}.chat-header-avatar{width:36px;height:36px;border-radius:var(--radius-md);background:var(--bg-elevated);display:flex;align-items:center;justify-content:center;font-size:14px;font-weight:600;color:var(--text-secondary);flex-shrink:0}.chat-header-avatar.dm{border-radius:50%}.chat-header-info{min-width:0}.chat-header-name{font-size:15px;font-weight:600;color:var(--text-primary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;display:flex;align-items:center;gap:6px}.chat-header-name .encrypt-badge{font-size:11px;font-weight:500;color:var(--accent-text);background:var(--accent-glow);border:1px solid rgba(108,62,244,.25);padding:1px 6px;border-radius:var(--radius-full);display:flex;align-items:center;gap:3px;flex-shrink:0}.chat-header-name .encrypt-badge svg{width:10px;height:10px}.chat-header-meta{font-size:12px;color:var(--text-muted);display:flex;align-items:center;gap:6px}.chat-header-actions{display:flex;align-items:center;gap:4px}.messages-container{flex:1;overflow-y:auto;padding:20px 20px 8px;display:flex;flex-direction:column;gap:2px}.messages-container.loading{display:flex;align-items:center;justify-content:center}.message-group{margin-bottom:4px}.message-group+.message-group{margin-top:12px}.message-group-header{display:flex;align-items:center;gap:10px;margin-bottom:8px}.message-group-avatar{width:32px;height:32px;border-radius:50%;background:var(--bg-elevated);display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:600;color:var(--text-secondary);flex-shrink:0;align-self:flex-start}.message-group-meta{display:flex;align-items:baseline;gap:8px}.message-group-name{font-size:13px;font-weight:600;color:var(--text-primary)}.message-group-time{font-size:11px;color:var(--text-muted)}.message-group-body{padding-left:42px}.message-bubble{display:inline-block;max-width:min(480px,72%);background:var(--bg-elevated);border:1px solid var(--border);border-radius:0 var(--radius-lg) var(--radius-lg) var(--radius-lg);padding:9px 13px;font-size:14px;color:var(--text-primary);line-height:1.55;word-break:break-word;margin-bottom:2px;position:relative}.message-row{display:flex;margin-bottom:2px}.message-row.own{justify-content:flex-end}.message-row.own .message-group-body{padding-left:0}.message-row.own .message-bubble{background:var(--accent);border-color:var(--accent-dim);border-radius:var(--radius-lg) 0 var(--radius-lg) var(--radius-lg);color:#fff}.message-row.own .message-time{text-align:right}.message-time{font-size:11px;color:var(--text-muted);padding:2px 0;display:flex;align-items:center;gap:4px}.message-row.own .message-time{justify-content:flex-end}.message-status svg{width:14px;height:14px;color:var(--accent-text)}.day-divider{display:flex;align-items:center;gap:12px;margin:20px 0 16px}.day-divider:before,.day-divider:after{content:"";flex:1;height:1px;background:var(--border)}.day-divider-text{font-size:11px;color:var(--text-muted);white-space:nowrap;padding:3px 10px;background:var(--bg-elevated);border:1px solid var(--border);border-radius:var(--radius-full)}.typing-indicator{display:flex;align-items:center;gap:8px;padding:0 20px 8px;font-size:12px;color:var(--text-muted);min-height:24px;flex-shrink:0}.typing-dots{display:flex;align-items:center;gap:3px}.typing-dot{width:4px;height:4px;background:var(--text-muted);border-radius:50%;animation:typingBounce 1.4s infinite ease-in-out}.typing-dot:nth-child(2){animation-delay:.2s}.typing-dot:nth-child(3){animation-delay:.4s}@keyframes typingBounce{0%,80%,to{transform:translateY(0)}40%{transform:translateY(-4px)}}.message-input-area{padding:12px 16px 16px;border-top:1px solid var(--border);background:var(--bg-surface);flex-shrink:0}.message-input-wrapper{display:flex;align-items:flex-end;gap:8px;background:var(--bg-input);border:1px solid var(--border);border-radius:var(--radius-lg);padding:4px 4px 4px 14px;transition:border-color var(--transition),box-shadow var(--transition)}.message-input-wrapper:focus-within{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-glow)}.message-textarea{flex:1;background:transparent;border:none;outline:none;resize:none;font-size:14px;color:var(--text-primary);line-height:1.5;padding:8px 0;max-height:140px;min-height:40px;overflow-y:auto}.message-textarea::placeholder{color:var(--text-muted)}.message-input-actions{display:flex;align-items:center;gap:2px;padding-bottom:4px}.input-action-btn{width:32px;height:32px;display:flex;align-items:center;justify-content:center;border-radius:var(--radius-sm);color:var(--text-muted);transition:all var(--transition);flex-shrink:0;cursor:pointer}.input-action-btn:hover{background:var(--bg-hover);color:var(--text-secondary)}.send-btn{width:34px;height:34px;background:var(--accent);border-radius:var(--radius-md);display:flex;align-items:center;justify-content:center;color:#fff;transition:all var(--transition);cursor:pointer;flex-shrink:0}.send-btn:hover{background:var(--accent-dim)}.send-btn:active{transform:scale(.95)}.send-btn:disabled{opacity:.4;cursor:not-allowed;transform:none}.send-btn svg{width:16px;height:16px}.message-input-hint{text-align:center;font-size:11px;color:var(--text-muted);margin-top:8px}.message-input-hint kbd{font-family:var(--font-mono);font-size:10px;background:var(--bg-elevated);border:1px solid var(--border);padding:1px 4px;border-radius:3px}.empty-state{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:16px;color:var(--text-muted);padding:40px;text-align:center}.empty-state-icon{width:64px;height:64px;background:var(--bg-elevated);border:1px solid var(--border);border-radius:var(--radius-xl);display:flex;align-items:center;justify-content:center;margin-bottom:4px}.empty-state-icon svg{width:28px;height:28px;color:var(--text-muted)}.empty-state h3{font-size:17px;font-weight:600;color:var(--text-secondary)}.empty-state p{font-size:14px;color:var(--text-muted);max-width:320px;line-height:1.6}.empty-state-actions{display:flex;gap:10px;margin-top:8px}.loading-state{display:flex;align-items:center;justify-content:center;gap:10px;padding:40px;color:var(--text-muted);font-size:14px}.pulse{animation:pulse 1.5s ease-in-out infinite}@keyframes pulse{0%,to{opacity:1}50%{opacity:.4}}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#000000b3;display:flex;align-items:center;justify-content:center;z-index:200;opacity:0;pointer-events:none;transition:opacity var(--transition)}.modal-overlay.visible{opacity:1;pointer-events:all}.modal{background:var(--bg-surface);border:1px solid var(--border-light);border-radius:var(--radius-xl);padding:28px;width:100%;max-width:440px;box-shadow:var(--shadow-lg);transform:translateY(8px);transition:transform var(--transition)}.modal-overlay.visible .modal{transform:translateY(0)}.modal-title{font-size:17px;font-weight:600;color:var(--text-primary);margin-bottom:6px}.modal-subtitle{font-size:13px;color:var(--text-muted);margin-bottom:22px;line-height:1.6}.modal-tabs{display:flex;gap:0;background:var(--bg-input);border:1px solid var(--border);border-radius:var(--radius-md);padding:3px;margin-bottom:20px}.modal-tab{flex:1;padding:7px;border-radius:calc(var(--radius-md) - 2px);font-size:13px;font-weight:500;color:var(--text-muted);text-align:center;cursor:pointer;transition:all var(--transition)}.modal-tab.active{background:var(--bg-elevated);color:var(--text-primary)}.modal-actions{display:flex;gap:10px;margin-top:20px}.modal-actions .btn{flex:1}.btn-secondary{background:var(--bg-elevated);border:1px solid var(--border);color:var(--text-secondary)}.btn-secondary:hover{background:var(--bg-hover);color:var(--text-primary)}.toast-container{position:fixed;bottom:24px;right:24px;display:flex;flex-direction:column;gap:8px;z-index:300;pointer-events:none}.toast{background:var(--bg-elevated);border:1px solid var(--border-light);border-radius:var(--radius-lg);padding:12px 16px;font-size:13px;color:var(--text-primary);box-shadow:var(--shadow-md);pointer-events:all;display:flex;align-items:center;gap:10px;animation:toastIn .25s ease forwards;max-width:320px}.toast.success{border-color:#22c55e4d}.toast.error{border-color:#ef44444d}.toast-icon{width:16px;height:16px;flex-shrink:0}.toast.success .toast-icon{color:var(--green)}.toast.error .toast-icon{color:var(--red)}@keyframes toastIn{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}.encrypt-info-bar{display:flex;align-items:center;gap:8px;padding:8px 20px;background:#6c3ef414;border-bottom:1px solid rgba(108,62,244,.15);font-size:12px;color:var(--accent-text);flex-shrink:0}.encrypt-info-bar svg{width:13px;height:13px;flex-shrink:0}.connection-banner{display:flex;align-items:center;justify-content:center;gap:8px;padding:6px;background:#ef44441a;border-bottom:1px solid rgba(239,68,68,.2);font-size:12px;color:#fca5a5;flex-shrink:0}.connection-banner.hidden{display:none}.connection-banner .spinner{border-color:#ef44444d;border-top-color:#ef4444}.no-room-selected{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:16px;color:var(--text-muted);background:var(--bg-base);position:relative;overflow:hidden}.no-room-selected:before{content:"";position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:500px;height:500px;background:radial-gradient(circle,rgba(108,62,244,.06) 0%,transparent 70%);pointer-events:none}.no-room-selected-icon{width:80px;height:80px;background:var(--bg-surface);border:1px solid var(--border);border-radius:24px;display:flex;align-items:center;justify-content:center}.no-room-selected-icon svg{width:36px;height:36px;color:var(--text-muted)}.no-room-selected h2{font-size:20px;font-weight:600;color:var(--text-secondary)}.no-room-selected p{font-size:14px;color:var(--text-muted);max-width:300px;text-align:center;line-height:1.6}.icon{display:inline-flex;align-items:center;justify-content:center}.hidden{display:none!important}.text-muted{color:var(--text-muted)}.text-accent{color:var(--accent-text)}.gap-2{gap:8px}