:root{--primary: #2563eb;--primary-dark: #1d4ed8;--danger: #dc2626;--success: #16a34a;--sidebar: #0f172a;--bg: #f1f5f9;--card: #ffffff;--text: #0f172a;--muted: #64748b;--border: #e2e8f0}*{box-sizing:border-box}body{margin:0;font-family:Segoe UI,system-ui,-apple-system,sans-serif;color:var(--text);background:var(--bg)}h1{font-size:22px;margin:0 0 16px}a{color:var(--primary);text-decoration:none}.muted{color:var(--muted);font-size:13px}.app-shell{display:flex;min-height:100vh}.sidebar{width:230px;background:var(--sidebar);color:#cbd5e1;flex-shrink:0;display:flex;flex-direction:column;position:sticky;top:0;height:100vh}.sidebar-brand{font-weight:700;color:#fff;padding:20px 16px;font-size:16px;border-bottom:1px solid rgba(255,255,255,.08)}.sidebar-nav{display:flex;flex-direction:column;padding:12px 8px;gap:2px}.nav-item{display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:8px;color:#cbd5e1;font-size:14px}.nav-item:hover{background:#ffffff0f;color:#fff}.nav-item.active{background:var(--primary);color:#fff}.nav-icon{width:18px;text-align:center}.main{flex:1;min-width:0;display:flex;flex-direction:column}.topbar{height:60px;background:var(--card);border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;padding:0 24px;position:sticky;top:0;z-index:10}.topbar-title{font-weight:600}.topbar-user{display:flex;align-items:center;gap:12px;font-size:14px}.content{padding:24px;max-width:1400px;width:100%;margin:0 auto}.card{background:var(--card);border:1px solid var(--border);border-radius:12px;padding:20px;margin-bottom:20px}.card-title{font-weight:600;font-size:16px;margin-bottom:12px}.page-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px}.page-header h1{margin:0}.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;border:1px solid transparent;border-radius:8px;padding:9px 14px;font-size:14px;cursor:pointer;font-weight:500;transition:background .15s}.btn:disabled{opacity:.55;cursor:not-allowed}.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover:not(:disabled){background:var(--primary-dark)}.btn-secondary{background:#fff;border-color:var(--border);color:var(--text)}.btn-secondary:hover:not(:disabled){background:#f8fafc}.btn-danger{background:var(--danger);color:#fff}.btn-ghost{background:transparent;color:var(--muted)}.btn-link{background:transparent;color:var(--primary)}.btn-block{width:100%}.btn-sm{padding:5px 10px;font-size:12px}.btn-row{display:flex;gap:6px;flex-wrap:wrap}.field{margin-bottom:14px}.field label{display:block;font-size:13px;font-weight:600;margin-bottom:6px}input,select,textarea{width:100%;padding:9px 12px;border:1px solid var(--border);border-radius:8px;font-size:14px;font-family:inherit;background:#fff}input:focus,select:focus,textarea:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px #2563eb1f}textarea{resize:vertical}.form-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:0 16px}.alert{padding:10px 14px;border-radius:8px;font-size:14px;margin-bottom:14px}.alert-error{background:#fef2f2;color:var(--danger);border:1px solid #fecaca}.alert-success{background:#f0fdf4;color:var(--success);border:1px solid #bbf7d0}.stat-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:16px;margin-bottom:20px}.stat-card{background:var(--card);border:1px solid var(--border);border-radius:12px;padding:16px}.stat-value{font-size:26px;font-weight:700}.stat-label{color:var(--muted);font-size:13px;margin-top:4px}.response-rate-value{font-size:28px;font-weight:700;margin-bottom:10px}.progress{height:8px;background:var(--border);border-radius:4px;overflow:hidden}.progress-fill{height:100%;background:var(--primary);border-radius:4px;transition:width .3s}.filters{padding:14px}.filter-row{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:10px}.filter-row select,.filter-row input[type=date]{width:auto;min-width:150px}.search-input{flex:1;min-width:220px}.bulk-bar{display:flex;align-items:center;gap:12px;background:#eff6ff;border:1px solid #bfdbfe;border-radius:8px;padding:10px 14px;margin-bottom:16px;font-size:14px}.bulk-bar select{width:auto}.table-card{padding:0;overflow:auto}.table{width:100%;border-collapse:collapse;font-size:14px}.table th,.table td{text-align:left;padding:11px 14px;border-bottom:1px solid var(--border);vertical-align:middle}.table th{background:#f8fafc;font-size:12px;text-transform:uppercase;color:var(--muted);letter-spacing:.03em}.table tr:last-child td{border-bottom:none}.empty{text-align:center;color:var(--muted);padding:24px}.lead-name{font-weight:600}.tiny-link{font-size:12px}.pagination{display:flex;align-items:center;justify-content:space-between;padding:14px;font-size:14px;color:var(--muted)}.badge{display:inline-block;padding:3px 9px;border-radius:999px;font-size:12px;font-weight:600}.badge-gray{background:#f1f5f9;color:#475569}.badge-blue{background:#dbeafe;color:#1d4ed8}.badge-green{background:#dcfce7;color:#15803d}.badge-purple{background:#f3e8ff;color:#7e22ce}.badge-orange{background:#ffedd5;color:#c2410c}.badge-red{background:#fee2e2;color:#b91c1c}.status-select{width:auto;min-width:140px;padding:5px 8px;font-size:12px}.login-screen{min-height:100vh;display:flex;align-items:center;justify-content:center;background:var(--sidebar);padding:20px}.login-card{background:var(--card);border-radius:14px;padding:32px;width:100%;max-width:400px}.login-card h1{margin-bottom:4px}.loading-screen{display:flex;align-items:center;justify-content:center;padding:60px;color:var(--muted)}.tabs{display:flex;gap:4px;margin-bottom:16px;border-bottom:1px solid var(--border)}.tab{border:none;background:transparent;padding:8px 14px;cursor:pointer;font-size:14px;color:var(--muted);border-bottom:2px solid transparent}.tab.active{color:var(--primary);border-bottom-color:var(--primary);font-weight:600}.collection-stats{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:12px}.instance-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:16px}.instance-header{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:10px}.instance-name{font-weight:600;font-size:16px}.instance-number{font-size:14px;margin-bottom:10px}.instance-actions{display:flex;gap:6px;flex-wrap:wrap;margin-top:12px}.qrcode{text-align:center;margin:10px 0}.qrcode img{width:200px;height:200px;border:1px solid var(--border);border-radius:8px}.variable-bar{display:flex;gap:6px;flex-wrap:wrap;margin-top:8px}.chip{border:1px solid var(--border);background:#f8fafc;border-radius:6px;padding:4px 8px;font-size:12px;cursor:pointer;font-family:monospace}.chip:hover{border-color:var(--primary);color:var(--primary)}.lead-picker{max-height:220px;overflow-y:auto;border:1px solid var(--border);border-radius:8px;margin-top:8px}.lead-option{display:flex;align-items:center;gap:10px;padding:8px 12px;border-bottom:1px solid var(--border);font-size:14px;cursor:pointer}.lead-option:last-child{border-bottom:none}.lead-option input{width:auto}.preview-item{border:1px solid var(--border);border-radius:8px;padding:12px;margin-bottom:10px}.preview-lead{font-weight:600;font-size:13px;margin-bottom:6px}.preview-message{background:#f8fafc;padding:10px;border-radius:6px;font-size:14px}.conversation-layout{display:grid;grid-template-columns:280px 1fr;gap:16px}.conversation-list input{margin-bottom:10px}.conversation-leads{display:flex;flex-direction:column;gap:4px}.conversation-lead{display:flex;flex-direction:column;align-items:flex-start;text-align:left;padding:10px;border:1px solid var(--border);border-radius:8px;background:#fff;cursor:pointer;gap:2px}.conversation-lead.active{border-color:var(--primary);background:#eff6ff}.conversation-header{border-bottom:1px solid var(--border);padding-bottom:12px;margin-bottom:12px}.messages{display:flex;flex-direction:column;gap:10px}.message{padding:10px 12px;border-radius:10px;max-width:80%}.message.incoming{align-self:flex-start;background:#f1f5f9}.message.outgoing{align-self:flex-end;background:#dcfce7}.message.system{align-self:flex-start;background:#fef9c3}.message-meta{display:flex;gap:8px;align-items:center;margin-bottom:4px;font-size:12px}.message-author{font-weight:700}.message-text{font-size:14px;white-space:pre-wrap;word-break:break-word}.message-error{margin-top:4px;color:var(--danger)}@media(max-width:900px){.sidebar{width:64px}.sidebar-brand,.nav-item span:not(.nav-icon){display:none}.conversation-layout{grid-template-columns:1fr}}