:root{--primary:#1f1f1f;--primary-light:#3a3a3a;--primary-hover:#2a2a2a;--accent:#c9a94e;--accent-hover:#b8992f;--accent-glow:#c9a94e26;--bg:#f5f5f5;--surface:#fff;--surface-hover:#fafafa;--text-primary:#333;--text-secondary:#999;--text-inverse:#fff;--border:#e8e8e8;--border-light:#f0f0f0;--bubble-reseller:#e8e8e8;--bubble-agent:#1f1f1f;--bubble-ai:#ede7f6;--bubble-system:#fff8e1;--dept-experts:#2196f3;--dept-dev:#4caf50;--dept-admin:#9e9e9e;--status-open:#4caf50;--status-idle:#ffc107;--status-closed:#9e9e9e;--unread-badge:#f44336;--shadow-sm:0 1px 3px #0000000f;--shadow-md:0 4px 12px #00000014;--shadow-lg:0 8px 24px #0000001f;--shadow-card:0 2px 8px #0000000d;--radius-sm:8px;--radius-md:12px;--radius-lg:16px;--radius-xl:24px;--radius-full:9999px;--transition-fast:.15s ease;--transition-normal:.25s ease;--transition-smooth:.35s cubic-bezier(.4, 0, .2, 1)}*,:before,:after{box-sizing:border-box;margin:0;padding:0}html{-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;font-size:16px}body{background:var(--bg);color:var(--text-primary);height:100vh;font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;line-height:1.5;overflow:hidden}#app{flex-direction:column;height:100vh;display:flex;overflow:hidden}::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:0 0}::-webkit-scrollbar-thumb{background:var(--border);border-radius:3px}::-webkit-scrollbar-thumb:hover{background:var(--text-secondary)}.app-shell{height:100vh;display:flex;overflow:hidden}.sidebar{background:var(--surface);border-right:1px solid var(--border);flex-direction:column;width:380px;min-width:380px;height:100vh;display:flex;overflow:hidden}.main-panel{background:var(--bg);flex-direction:column;flex:1;height:100vh;display:flex;overflow:hidden}.app-bar{background:var(--primary);color:var(--text-inverse);flex-shrink:0;align-items:center;gap:12px;min-height:56px;padding:14px 20px;display:flex}.app-bar h1{flex:1;font-size:18px;font-weight:700}.app-bar .logo{border-radius:var(--radius-sm);object-fit:contain;filter:brightness(0)invert();width:32px;height:32px}.app-bar-btn{color:var(--text-inverse);cursor:pointer;border-radius:var(--radius-sm);transition:background var(--transition-fast);background:0 0;border:none;justify-content:center;align-items:center;padding:6px;display:flex}.app-bar-btn:hover{background:#ffffff1f}.type-tabs{background:var(--primary);flex-shrink:0;display:flex}.type-tab{text-align:center;color:#ffffff80;cursor:pointer;transition:all var(--transition-fast);background:0 0;border:none;border-bottom:3px solid #0000;flex:1;justify-content:center;align-items:center;gap:6px;padding:10px 0;font-size:13px;font-weight:500;display:flex}.type-tab:hover{color:#ffffffbf}.type-tab.active{color:var(--text-inverse);border-bottom-color:var(--accent);font-weight:700}.status-tabs{background:var(--primary-light);flex-shrink:0;display:flex}.status-tab{text-align:center;color:#ffffff59;cursor:pointer;transition:all var(--transition-fast);background:0 0;border:none;flex:1;padding:8px 0;font-size:12px;font-weight:500}.status-tab:hover{color:#fff9}.status-tab.active{color:var(--text-inverse);font-weight:700}.conversation-list{flex:1;overflow:hidden auto}.conversation-item{cursor:pointer;border-bottom:1px solid var(--border-light);transition:background var(--transition-fast);align-items:flex-start;gap:12px;padding:14px 16px;display:flex;position:relative}.conversation-item:hover{background:var(--surface-hover)}.conversation-item.active{background:var(--accent-glow);border-left:3px solid var(--accent)}.conv-avatar{border-radius:var(--radius-full);width:44px;height:44px;color:var(--text-inverse);text-transform:uppercase;flex-shrink:0;justify-content:center;align-items:center;font-size:16px;font-weight:700;display:flex}.conv-avatar.helpdesk{background:var(--primary-light)}.conv-avatar.charter{background:var(--accent);color:var(--primary)}.conv-info{flex-direction:column;flex:1;gap:2px;min-width:0;display:flex}.conv-header{align-items:center;gap:8px;display:flex}.conv-name{white-space:nowrap;text-overflow:ellipsis;flex:1;font-size:14px;font-weight:600;overflow:hidden}.conv-time{color:var(--text-secondary);white-space:nowrap;flex-shrink:0;font-size:11px}.conv-preview{color:var(--text-secondary);white-space:nowrap;text-overflow:ellipsis;align-items:center;gap:6px;font-size:13px;display:flex;overflow:hidden}.conv-meta{align-items:center;gap:6px;margin-top:2px;display:flex}.dept-badge{border-radius:var(--radius-full);text-transform:uppercase;letter-spacing:.5px;color:var(--text-inverse);white-space:nowrap;padding:2px 8px;font-size:10px;font-weight:700}.dept-badge.experts{background:var(--dept-experts)}.dept-badge.dev{background:var(--dept-dev)}.dept-badge.admin{background:var(--dept-admin)}.status-dot{border-radius:var(--radius-full);flex-shrink:0;width:8px;height:8px}.status-dot.open{background:var(--status-open)}.status-dot.idle{background:var(--status-idle)}.status-dot.closed{background:var(--status-closed)}.unread-badge{background:var(--unread-badge);color:var(--text-inverse);border-radius:var(--radius-full);text-align:center;flex-shrink:0;min-width:20px;padding:1px 7px;font-size:11px;font-weight:700}.chat-header{background:var(--primary);color:var(--text-inverse);flex-shrink:0;align-items:center;gap:12px;min-height:56px;padding:12px 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.message-sender{color:var(--accent);text-align:right}.message-bubble{border-radius:var(--radius-lg);word-break:break-word;padding:10px 14px;font-size:14px;line-height:1.45;position:relative}.message-row.reseller .message-bubble{background:var(--bubble-reseller);color:var(--text-primary);border-bottom-left-radius:4px}.message-row.agent .message-bubble{background:var(--bubble-agent);color:var(--text-inverse);border-bottom-right-radius:4px}.message-row.system .message-bubble{background:var(--bubble-system);color:var(--text-primary);text-align:center;border-radius:var(--radius-md);font-size:12px}.message-row.ai .message-bubble{background:var(--bubble-ai);color:var(--text-primary);border-bottom-left-radius:4px}.message-time{color:var(--text-secondary);margin-top:3px;padding:0 8px;font-size:10px}.message-row.agent .message-time{text-align:right}.chat-input-area{background:var(--surface);border-top:1px solid var(--border);flex-shrink:0;align-items:flex-end;gap:10px;padding:12px 16px;display:flex}.chat-input{border:1px solid var(--border);border-radius:var(--radius-xl);background:var(--bg);resize:none;max-height:120px;transition:border-color var(--transition-fast);outline:none;flex:1;padding:10px 16px;font-family:inherit;font-size:14px;line-height:1.4}.chat-input:focus{border-color:var(--accent)}.chat-input::placeholder{color:var(--text-secondary)}.send-btn{border-radius:var(--radius-full);background:var(--text-secondary);width:44px;height:44px;color:var(--text-inverse);cursor:pointer;transition:all var(--transition-fast);opacity:.4;border:none;flex-shrink:0;justify-content:center;align-items:center;display:flex}.send-btn.active{background:var(--primary);opacity:1}.send-btn.active:hover{background:var(--primary-hover);transform:scale(1.05)}.send-btn.sending{opacity:.6;pointer-events:none}.empty-state{color:var(--text-secondary);flex-direction:column;flex:1;justify-content:center;align-items:center;gap:12px;display:flex}.empty-state .material-icons-round{opacity:.3;font-size:64px}.empty-state p{font-size:16px}.login-page{background:linear-gradient(135deg, var(--primary) 0%, #2c2c2c 50%, var(--primary) 100%);justify-content:center;align-items:center;height:100vh;padding:20px;display:flex}.login-card{background:var(--surface);border-radius:var(--radius-lg);width:100%;max-width:420px;box-shadow:var(--shadow-lg);text-align:center;padding:48px 40px;animation:.4s cardSlideUp}@keyframes cardSlideUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.login-logo{background:var(--primary);border-radius:var(--radius-md);justify-content:center;align-items:center;width:80px;height:80px;margin:0 auto 12px;padding:16px;display:flex}.login-logo img{filter:brightness(0)invert();width:100%}.login-title{color:var(--text-primary);margin-bottom:32px;font-size:22px;font-weight:600}.form-group{text-align:left;margin-bottom:16px}.form-input{border:1px solid var(--border);border-radius:var(--radius-md);background:var(--bg);width:100%;transition:all var(--transition-fast);outline:none;padding:12px 16px;font-family:inherit;font-size:14px}.form-input:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-glow)}.form-label{color:var(--text-secondary);margin-bottom:6px;font-size:13px;font-weight:500;display:block}.form-error{color:#d32f2f;border-radius:var(--radius-md);background:#fff0f0;margin-bottom:16px;padding:10px 14px;font-size:13px;display:none}.form-error.visible{display:block}.btn{border-radius:var(--radius-md);cursor:pointer;width:100%;transition:all var(--transition-fast);border:none;padding:12px;font-family:inherit;font-size:15px;font-weight:600}.btn-primary{background:var(--primary);color:var(--text-inverse)}.btn-primary:hover:not(:disabled){background:var(--primary-hover);box-shadow:var(--shadow-md);transform:translateY(-1px)}.btn-primary:disabled{opacity:.6;cursor:not-allowed}.btn-accent{background:var(--accent);color:var(--primary)}.btn-accent:hover:not(:disabled){background:var(--accent-hover)}.btn-outline{color:var(--text-primary);border:1px solid var(--border);background:0 0}.btn-outline:hover{background:var(--bg)}.settings-page{flex:1;max-width:600px;margin:0 auto;padding:24px;overflow-y:auto}.settings-card{background:var(--surface);border-radius:var(--radius-md);box-shadow:var(--shadow-card);margin-bottom:16px;padding:20px}.settings-card h3{color:var(--text-secondary);text-transform:uppercase;letter-spacing:.5px;margin-bottom:16px;font-size:14px;font-weight:600}.settings-row{border-bottom:1px solid var(--border-light);justify-content:space-between;align-items:center;padding:10px 0;display:flex}.settings-row:last-child{border-bottom:none}.settings-label{color:var(--text-secondary);font-size:13px}.settings-value{font-size:14px;font-weight:500}.modal-overlay{z-index:1000;opacity:0;visibility:hidden;transition:all var(--transition-normal);background:#00000080;justify-content:center;align-items:center;display:flex;position:fixed;inset:0}.modal-overlay.visible{opacity:1;visibility:visible}.modal{background:var(--surface);border-radius:var(--radius-lg);width:90%;max-width:360px;box-shadow:var(--shadow-lg);transition:transform var(--transition-smooth);padding:24px;transform:scale(.9)}.modal-overlay.visible .modal{transform:scale(1)}.modal h2{text-align:center;margin-bottom:16px;font-size:18px;font-weight:600}.modal-option{border-radius:var(--radius-md);cursor:pointer;transition:background var(--transition-fast);background:0 0;border:none;align-items:center;gap:12px;width:100%;padding:12px 16px;font-family:inherit;font-size:15px;display:flex}.modal-option:hover{background:var(--bg)}.modal-option .material-icons-round{font-size:24px}.modal-option.experts .material-icons-round{color:var(--dept-experts)}.modal-option.dev .material-icons-round{color:var(--dept-dev)}.modal-option.admin .material-icons-round{color:var(--dept-admin)}.loading-spinner{color:var(--text-secondary);justify-content:center;align-items:center;gap:12px;padding:32px;font-size:14px;display:flex}.spinner{border:3px solid var(--border);border-top-color:var(--accent);border-radius:var(--radius-full);width:24px;height:24px;animation:.8s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}.search-bar{background:var(--surface);border-bottom:1px solid var(--border-light);flex-shrink:0;padding:8px 12px}.search-input-wrapper{background:var(--bg);border-radius:var(--radius-xl);align-items:center;gap:8px;padding:6px 12px;display:flex}.search-input-wrapper .material-icons-round{color:var(--text-secondary);font-size:20px}.search-input{color:var(--text-primary);background:0 0;border:none;outline:none;flex:1;font-family:inherit;font-size:13px}.search-input::placeholder{color:var(--text-secondary)}.charter-form{flex:1;max-width:600px;margin:0 auto;padding:24px;overflow-y:auto}.charter-form h2{margin-bottom:24px;font-size:20px;font-weight:700}.participant-list{flex-direction:column;gap:12px;margin-bottom:16px;display:flex}.participant-row{align-items:flex-end;gap:8px;display:flex}.participant-row .form-group{flex:1;margin-bottom:0}.remove-participant{color:#d32f2f;border-radius:var(--radius-md);cursor:pointer;background:#ffebee;border:none;flex-shrink:0;justify-content:center;align-items:center;width:40px;height:40px;display:flex}.toast{background:var(--primary);color:var(--text-inverse);border-radius:var(--radius-md);box-shadow:var(--shadow-lg);z-index:2000;transition:transform var(--transition-smooth);white-space:nowrap;padding:12px 24px;font-size:14px;position:fixed;bottom:24px;left:50%;transform:translate(-50%)translateY(100px)}.toast.visible{transform:translate(-50%)translateY(0)}.toast.error{background:#d32f2f}.toast.success{background:var(--status-open)}.fab{background:var(--accent);color:var(--primary);border-radius:var(--radius-full);cursor:pointer;box-shadow:var(--shadow-md);transition:all var(--transition-fast);z-index:10;border:none;align-items:center;gap:8px;padding:14px 20px;font-family:inherit;font-size:14px;font-weight:600;display:flex;position:absolute;bottom:20px;right:20px}.fab:hover{background:var(--accent-hover);box-shadow:var(--shadow-lg);transform:translateY(-2px)}.date-separator{text-align:center;color:var(--text-secondary);padding:8px 0;font-size:11px;position:relative}.date-separator span{background:var(--bg);z-index:1;padding:0 12px;position:relative}.date-separator:before{content:"";background:var(--border);height:1px;position:absolute;top:50%;left:20%;right:20%}@media (width<=768px){.sidebar{width:100%;min-width:100%}.main-panel{z-index:100;transition:transform var(--transition-smooth);position:fixed;inset:0;transform:translate(100%)}.main-panel.open{transform:translate(0)}.message-row{max-width:85%}}