/* ─── Design Tokens ───────────────────────────────────────────── */
:root {
  --primary:        #2563EB;
  --primary-dark:   #1D4ED8;
  --secondary:      #059669;
  --warning:        #D97706;
  --error:          #DC2626;
  --bg:             #F8FAFC;
  --surface:        #FFFFFF;
  --text-primary:   #1E293B;
  --text-secondary: #64748B;
  --border:         #E2E8F0;
  --agent-bubble:   #F1F5F9;
  --user-bubble:    #2563EB;
  --sidebar-bg:     #1E293B;
  --sidebar-text:   #CBD5E1;
  --sidebar-active: #2563EB;
  --radius-card:    8px;
  --radius-bubble:  12px;
  --radius-btn:     6px;
  --shadow-card:    0 1px 3px rgba(0,0,0,0.1);
  --shadow-modal:   0 4px 12px rgba(0,0,0,0.15);
  --transition:     all 0.2s ease;
  --font:           'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%}
body{font-family:var(--font);font-size:14px;color:var(--text-primary);background:var(--bg);line-height:1.5}
a{color:var(--primary);text-decoration:none}
a:hover{text-decoration:underline}
button{font-family:var(--font);cursor:pointer;border:none;outline:none}
input,textarea,select{font-family:var(--font);font-size:14px}
#app{display:flex;height:100vh;overflow:hidden}
#sidebar{width:260px;min-width:260px;background:var(--sidebar-bg);display:flex;flex-direction:column;overflow-y:auto;transition:var(--transition)}
#content{flex:1;overflow-y:auto;background:var(--bg)}
.sidebar-logo{padding:20px 20px 16px;border-bottom:1px solid rgba(255,255,255,0.08)}
.sidebar-logo h1{color:#fff;font-size:16px;font-weight:700;line-height:1.2}
.sidebar-logo p{color:var(--sidebar-text);font-size:12px;margin-top:2px}
.sidebar-section{padding:16px 12px 4px;color:#64748B;font-size:11px;font-weight:600;letter-spacing:0.06em;text-transform:uppercase}
.sidebar-nav{flex:1;padding:8px 0}
.nav-item{display:flex;align-items:center;gap:10px;padding:9px 20px;color:var(--sidebar-text);font-size:14px;font-weight:500;text-decoration:none;border-radius:6px;margin:2px 8px;transition:var(--transition);cursor:pointer}
.nav-item:hover{background:rgba(255,255,255,0.08);color:#fff;text-decoration:none}
.nav-item.active{background:var(--sidebar-active);color:#fff}
.nav-item .icon{font-size:16px;width:20px;text-align:center;flex-shrink:0}
.sidebar-footer{padding:16px 20px;border-top:1px solid rgba(255,255,255,0.08)}
.sidebar-user{color:var(--sidebar-text);font-size:13px;margin-bottom:8px}
.sidebar-user strong{color:#fff;display:block}
.btn-logout{width:100%;padding:8px 12px;background:rgba(255,255,255,0.08);color:var(--sidebar-text);border-radius:var(--radius-btn);font-size:13px;text-align:center;transition:var(--transition)}
.btn-logout:hover{background:rgba(255,255,255,0.15);color:#fff}
.card{background:var(--surface);border-radius:var(--radius-card);box-shadow:var(--shadow-card);padding:24px}
.card-title{font-size:16px;font-weight:600;margin-bottom:16px}
.card-subtitle{font-size:13px;color:var(--text-secondary);margin-bottom:16px}
.btn{display:inline-flex;align-items:center;gap:6px;padding:8px 16px;border-radius:var(--radius-btn);font-size:14px;font-weight:500;transition:var(--transition);cursor:pointer}
.btn-sm{padding:5px 10px;font-size:12px}
.btn-lg{padding:11px 24px;font-size:15px}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-dark)}
.btn-secondary{background:transparent;color:var(--primary);border:1px solid var(--primary)}
.btn-secondary:hover{background:rgba(37,99,235,0.05)}
.btn-success{background:var(--secondary);color:#fff}
.btn-success:hover{background:#047857}
.btn-danger{background:var(--error);color:#fff}
.btn-danger:hover{background:#B91C1C}
.btn-ghost{background:transparent;color:var(--text-secondary);border:1px solid var(--border)}
.btn-ghost:hover{background:var(--bg);color:var(--text-primary)}
.btn:disabled{opacity:0.5;cursor:not-allowed}
.form-group{margin-bottom:16px}
.form-group label{display:block;font-size:13px;font-weight:500;color:var(--text-secondary);margin-bottom:6px}
.form-control{width:100%;padding:9px 12px;border:1px solid var(--border);border-radius:var(--radius-btn);font-size:14px;color:var(--text-primary);background:var(--surface);transition:var(--transition)}
.form-control:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(37,99,235,0.1)}
.form-control.error{border-color:var(--error)}
.form-error{font-size:12px;color:var(--error);margin-top:4px}
.table-wrap{overflow-x:auto}
table{width:100%;border-collapse:collapse}
thead th{background:var(--bg);padding:10px 16px;text-align:left;font-size:12px;font-weight:600;color:var(--text-secondary);letter-spacing:0.04em;text-transform:uppercase;border-bottom:1px solid var(--border);white-space:nowrap}
tbody tr{border-bottom:1px solid var(--border);transition:var(--transition)}
tbody tr:hover{background:var(--bg)}
tbody td{padding:12px 16px;font-size:14px}
tbody tr:last-child{border-bottom:none}
.badge{display:inline-flex;align-items:center;padding:2px 8px;border-radius:999px;font-size:11px;font-weight:600;text-transform:capitalize}
.badge-blue{background:#DBEAFE;color:#1D4ED8}
.badge-green{background:#D1FAE5;color:#065F46}
.badge-amber{background:#FEF3C7;color:#92400E}
.badge-red{background:#FEE2E2;color:#991B1B}
.badge-gray{background:var(--bg);color:var(--text-secondary);border:1px solid var(--border)}
.badge-purple{background:#EDE9FE;color:#5B21B6}
.page-header{display:flex;align-items:center;justify-content:space-between;padding:24px 32px 0;margin-bottom:24px}
.page-header h2{font-size:22px;font-weight:700}
.page-header .page-actions{display:flex;gap:8px}
.page-body{padding:0 32px 32px}
.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:16px;margin-bottom:24px}
.stat-card{background:var(--surface);border-radius:var(--radius-card);box-shadow:var(--shadow-card);padding:20px}
.stat-card .stat-label{font-size:12px;font-weight:600;color:var(--text-secondary);text-transform:uppercase;letter-spacing:0.04em}
.stat-card .stat-value{font-size:28px;font-weight:700;margin:6px 0 4px;line-height:1}
.stat-card .stat-sub{font-size:12px;color:var(--text-secondary)}
.stat-card.warning .stat-value{color:var(--warning)}
.stat-card.danger  .stat-value{color:var(--error)}
.stat-card.success .stat-value{color:var(--secondary)}
.progress-bar{width:100%;height:6px;background:var(--border);border-radius:3px;overflow:hidden}
.progress-bar-fill{height:100%;background:var(--primary);border-radius:3px;transition:width 0.4s ease}
.spinner{width:24px;height:24px;border:2px solid var(--border);border-top-color:var(--primary);border-radius:50%;animation:spin 0.7s linear infinite;display:inline-block}
@keyframes spin{to{transform:rotate(360deg)}}
.loading-center{display:flex;justify-content:center;align-items:center;padding:48px}
#toast-root{position:fixed;top:20px;right:20px;z-index:9999;display:flex;flex-direction:column;gap:8px}
.toast{padding:12px 20px;background:var(--surface);border-radius:var(--radius-card);box-shadow:var(--shadow-modal);border-left:4px solid var(--primary);font-size:14px;max-width:360px;animation:slideIn 0.2s ease}
.toast.error{border-color:var(--error)}
.toast.success{border-color:var(--secondary)}
.toast.warning{border-color:var(--warning)}
@keyframes slideIn{from{transform:translateX(100%);opacity:0}to{transform:translateX(0);opacity:1}}
.modal-backdrop{position:fixed;inset:0;background:rgba(0,0,0,0.5);z-index:1000;display:flex;align-items:center;justify-content:center;padding:20px}
.modal{background:var(--surface);border-radius:var(--radius-card);box-shadow:var(--shadow-modal);max-width:560px;width:100%;max-height:90vh;display:flex;flex-direction:column}
.modal-lg{max-width:800px}
.modal-xl{max-width:1100px}
.modal-header{display:flex;align-items:center;justify-content:space-between;padding:20px 24px 16px;border-bottom:1px solid var(--border)}
.modal-title{font-size:16px;font-weight:600}
.modal-close{background:none;border:none;font-size:20px;cursor:pointer;color:var(--text-secondary);line-height:1;padding:4px;border-radius:4px}
.modal-close:hover{background:var(--bg);color:var(--text-primary)}
.modal-body{padding:24px;overflow-y:auto;flex:1}
.modal-footer{display:flex;align-items:center;justify-content:flex-end;gap:8px;padding:16px 24px;border-top:1px solid var(--border)}
.filter-bar{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-bottom:16px}
.filter-bar select,.filter-bar input{max-width:180px}
.filter-bar .search-input{min-width:220px}
.empty-state{text-align:center;padding:60px 20px;color:var(--text-secondary)}
.empty-state .empty-icon{font-size:40px;margin-bottom:12px}
.empty-state p{font-size:15px;margin-bottom:16px}
@media(max-width:768px){
  #sidebar{display:none;position:fixed;z-index:200;height:100vh}
  #sidebar.open{display:flex}
  .page-header{padding:16px 16px 0}
  .page-body{padding:0 16px 24px}
  .stats-grid{grid-template-columns:1fr 1fr}
  .hamburger{display:block!important}
}
.hamburger{display:none;position:fixed;top:12px;left:12px;z-index:300;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-btn);padding:8px;cursor:pointer;font-size:18px;box-shadow:var(--shadow-card)}