:root{--bg-primary:#0f0f12;--bg-secondary:#16161d;--bg-card:#1c1c26;--bg-hover:#24243a;--bg-active:#2a2a44;--border:#2a2a3e;--text-primary:#e8e8f0;--text-secondary:#9999b0;--text-muted:#666680;--accent:#6c63ff;--accent-hover:#7b73ff;--accent-glow:rgba(108,99,255,.15);--green:#22c55e;--yellow:#f59e0b;--red:#ef4444;--blue:#3b82f6;--channel-facebook:#1877f2;--channel-line:#06c755;--channel-whatsapp:#25d366;--channel-telegram:#08c;--channel-webchat:#6c63ff;--radius:8px;--radius-lg:12px;--font:"Inter",-apple-system,BlinkMacSystemFont,sans-serif;--shadow:0 4px 24px rgba(0,0,0,.3)}*{margin:0;padding:0;box-sizing:border-box}body,html{height:100%;font-family:var(--font);background:var(--bg-primary);color:var(--text-primary);-webkit-font-smoothing:antialiased}.app-layout{display:flex;height:100vh;overflow:hidden}.sidebar{width:64px;background:var(--bg-secondary);border-right:1px solid var(--border);flex-direction:column;padding:16px 0;gap:8px}.sidebar,.sidebar-logo{display:flex;align-items:center}.sidebar-logo{background:linear-gradient(135deg,var(--accent),#a855f7);font-weight:700;color:#fff;margin-bottom:24px}.sidebar-icon,.sidebar-logo{width:40px;height:40px;border-radius:var(--radius);justify-content:center;font-size:18px}.sidebar-icon{display:flex;align-items:center;color:var(--text-muted);cursor:pointer;transition:all .2s}.sidebar-icon:hover{background:var(--bg-hover);color:var(--text-primary)}.sidebar-icon.active{background:var(--accent-glow);color:var(--accent)}.conversation-panel{width:360px;background:var(--bg-secondary);border-right:1px solid var(--border);display:flex;flex-direction:column;overflow:hidden}.panel-header{padding:20px;border-bottom:1px solid var(--border)}.panel-header h2{font-size:20px;font-weight:700;margin-bottom:12px}.search-input{width:100%;padding:10px 14px;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);color:var(--text-primary);font-size:14px;outline:none;transition:border-color .2s}.search-input:focus{border-color:var(--accent)}.filter-tabs{display:flex;gap:4px;padding:12px 20px;border-bottom:1px solid var(--border)}.filter-tab{padding:6px 14px;border-radius:20px;font-size:13px;font-weight:500;cursor:pointer;transition:all .2s;background:transparent;border:none;color:var(--text-secondary)}.filter-tab:hover{background:var(--bg-hover)}.filter-tab.active{background:var(--accent);color:#fff}.conversation-list{flex:1 1;overflow-y:auto}.conversation-item{display:flex;gap:12px;padding:14px 20px;cursor:pointer;transition:background .15s;border-bottom:1px solid var(--border)}.conversation-item:hover{background:var(--bg-hover)}.conversation-item.active{background:var(--bg-active);border-left:3px solid var(--accent)}.avatar{width:44px;height:44px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:600;font-size:16px;color:#fff;flex-shrink:0}.conversation-info{flex:1 1;min-width:0}.conversation-info .name{font-weight:600;font-size:14px;margin-bottom:4px;display:flex;justify-content:space-between}.conversation-info .name .time{font-size:12px;color:var(--text-muted);font-weight:400}.conversation-info .preview{font-size:13px;color:var(--text-secondary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.channel-badge{display:inline-block;padding:2px 8px;border-radius:10px;font-size:11px;font-weight:600;text-transform:uppercase;letter-spacing:.5px;color:#fff}.chat-panel{flex:1 1;display:flex;flex-direction:column;background:var(--bg-primary)}.chat-header{padding:16px 24px;border-bottom:1px solid var(--border);display:flex;align-items:center;gap:16px;background:var(--bg-secondary)}.chat-header-info h3{font-size:16px;font-weight:600}.chat-header-info p{font-size:13px;color:var(--text-secondary)}.chat-header-actions{margin-left:auto;display:flex;gap:8px}.btn{padding:8px 16px;border-radius:var(--radius);font-size:13px;font-weight:500;cursor:pointer;border:1px solid var(--border);background:var(--bg-card);color:var(--text-primary);transition:all .2s}.btn:hover{background:var(--bg-hover)}.btn-primary{background:var(--accent);border-color:var(--accent);color:#fff}.btn-primary:hover{background:var(--accent-hover)}.btn-success{background:var(--green);border-color:var(--green);color:#fff}.btn-icon{width:36px;height:36px;padding:0;display:flex;align-items:center;justify-content:center}.messages-area{flex:1 1;overflow-y:auto;padding:24px;gap:16px}.message,.messages-area{display:flex;flex-direction:column}.message{max-width:70%;gap:4px}.message.inbound{align-self:flex-start}.message.outbound{align-self:flex-end}.message-bubble{padding:12px 16px;border-radius:var(--radius-lg);font-size:14px;line-height:1.5;word-break:break-word}.message.inbound .message-bubble{background:var(--bg-card);border:1px solid var(--border);border-bottom-left-radius:4px}.message.outbound .message-bubble{background:var(--accent);color:#fff;border-bottom-right-radius:4px}.message-meta{font-size:11px;color:var(--text-muted);display:flex;gap:8px}.message.outbound .message-meta{justify-content:flex-end}.reply-form{padding:16px 24px;border-top:1px solid var(--border);background:var(--bg-secondary);display:flex;gap:12px;align-items:flex-end}.reply-input{flex:1 1;padding:12px 16px;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);color:var(--text-primary);font-size:14px;font-family:var(--font);resize:none;outline:none;min-height:44px;max-height:120px;transition:border-color .2s}.reply-input:focus{border-color:var(--accent)}.send-btn{width:44px;height:44px;border-radius:50%;background:var(--accent);border:none;color:#fff;cursor:pointer;display:flex;align-items:center;justify-content:center;font-size:18px;transition:background .2s,transform .1s;flex-shrink:0}.send-btn:hover{background:var(--accent-hover);transform:scale(1.05)}.send-btn:active{transform:scale(.95)}.empty-state{flex:1 1;display:flex;flex-direction:column;align-items:center;justify-content:center;color:var(--text-muted);gap:12px}.empty-state .icon{font-size:48px;opacity:.5}.empty-state p{font-size:16px}.contact-panel{width:300px;background:var(--bg-secondary);border-left:1px solid var(--border);padding:24px;overflow-y:auto}.contact-panel h3{font-size:14px;font-weight:600;text-transform:uppercase;letter-spacing:.5px;color:var(--text-muted);margin-bottom:16px}.contact-detail{margin-bottom:24px}.contact-detail .label{font-size:12px;color:var(--text-muted);margin-bottom:4px}.contact-detail .value{font-size:14px;color:var(--text-primary)}.status-dot{width:8px;height:8px;border-radius:50%;display:inline-block;margin-right:6px}.status-dot.open{background:var(--green)}.status-dot.pending{background:var(--yellow)}.status-dot.resolved{background:var(--blue)}.status-dot.closed{background:var(--text-muted)}::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--border);border-radius:3px}::-webkit-scrollbar-thumb:hover{background:var(--text-muted)}@keyframes fadeIn{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}.message{animation:fadeIn .25s ease-out}@keyframes pulse{0%,to{opacity:1}50%{opacity:.5}}.loading{animation:pulse 1.5s ease-in-out infinite}