:root{
  --bg:#f6f7fb;
  --card:#ffffff;
  --text:#0f172a;
  --muted:#64748b;
  --border:#e6e8ef;
  --primary:#4f46e5;
  --primary2:#6366f1;
  --danger:#ef4444;
  --warn:#f59e0b;
  --ok:#10b981;
  --shadow:0 10px 30px rgba(2,6,23,.06);
  --radius:14px;
  --radius-sm:10px;
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family:system-ui,-apple-system,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;
  color:var(--text);
  background:var(--bg);
}

a{color:#2563eb;text-decoration:none}
a:hover{text-decoration:underline}

.container{max-width:1100px;margin:18px auto;padding:0 14px}
.card{
  background:var(--card);
  border:1px solid var(--border);
  border-radius:var(--radius);
  overflow:hidden;
  box-shadow:var(--shadow);
}
.topbar{
  display:flex;align-items:center;justify-content:space-between;
  gap:12px;padding:14px 18px;background:#fff;border-bottom:1px solid var(--border);
}
.topbar .left{display:flex;gap:12px;align-items:center;min-width:0}
.topbar .right{display:flex;gap:10px;align-items:center;flex-wrap:wrap;justify-content:flex-end}
.muted{color:var(--muted);font-size:12px}
.pill{
  display:inline-flex;align-items:center;gap:6px;
  padding:2px 10px;border-radius:999px;background:#f1f5f9;color:#334155;font-size:12px
}
.badge{
  display:inline-flex;align-items:center;justify-content:center;
  min-width:18px;height:18px;padding:0 6px;border-radius:999px;
  background:var(--danger);color:#fff;font-size:11px;font-weight:800;line-height:1;
}
.btn{
  border:1px solid #cbd5e1;background:#fff;color:#0f172a;
  padding:9px 12px;border-radius:12px;cursor:pointer;font-weight:700;
  transition:transform .12s ease, box-shadow .12s ease, background .12s ease;
}
.btn:hover{background:#f8fafc;box-shadow:0 6px 18px rgba(2,6,23,.06);transform:translateY(-1px)}
.btn:active{transform:translateY(0)}
.btn-primary{
  border-color:transparent;background:linear-gradient(135deg,var(--primary2),var(--primary));color:#fff;
}
.btn-danger{border-color:transparent;background:var(--danger);color:#fff}
.btn:disabled{opacity:.55;cursor:not-allowed;transform:none;box-shadow:none}
.table{width:100%;border-collapse:collapse}
.table th,.table td{
  padding:12px 12px;border-bottom:1px solid #eef0f6;text-align:left;vertical-align:top;font-size:14px
}
.table th{background:#fafbff;font-size:13px;color:#475569}
.table tr:hover td{background:#f8fafc}
.ellipsis{max-width:320px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.kbd{
  font-size:12px;color:#334155;background:#f1f5f9;border:1px solid #e2e8f0;border-bottom-width:2px;
  padding:2px 6px;border-radius:8px
}

/* Login */
.auth{
  min-height:100%;
  display:flex;align-items:center;justify-content:center;padding:24px;
}
.auth-card{
  width:380px;max-width:100%;
  background:var(--card);
  border:1px solid var(--border);
  border-radius:18px;
  box-shadow:var(--shadow);
  padding:26px;
}
.auth-title{margin:0 0 6px 0;font-size:22px}
.auth-sub{margin:0 0 18px 0;color:var(--muted);font-size:13px}
.field{margin-top:12px}
.label{display:block;margin-bottom:6px;font-weight:700;font-size:13px}
.input{
  width:100%;
  padding:10px 12px;
  font-size:14px;
  border:1px solid #cbd5e1;
  border-radius:12px;
  outline:none;
  transition:border-color .12s ease, box-shadow .12s ease;
}
.input:focus{border-color:#93c5fd;box-shadow:0 0 0 4px rgba(59,130,246,.15)}
.input.error{border-color:#fca5a5;box-shadow:0 0 0 4px rgba(239,68,68,.12)}
.error-msg{
  margin-top:12px;
  color:#b91c1c;
  background:#fef2f2;
  border:1px solid #fecaca;
  padding:10px 12px;
  border-radius:12px;
  font-size:13px;
}

/* Support layout */
.support{
  display:flex;height:100vh;overflow:hidden;
}
.sidebar{
  width:320px;background:#fff;border-right:1px solid var(--border);
  display:flex;flex-direction:column;min-width:280px;
}
.sidebar-head{
  padding:14px 14px;border-bottom:1px solid var(--border);
  display:flex;align-items:center;justify-content:space-between;gap:10px;
}
.agent-name{font-weight:800}
.sidebar-tools{display:flex;gap:10px;align-items:center;flex-wrap:wrap;justify-content:flex-end}
.searchbox{
  padding:10px 12px;border-bottom:1px solid var(--border);background:#fff;
}
.searchbox input{
  width:100%;
  padding:10px 12px;border:1px solid #cbd5e1;border-radius:12px;font-size:14px;outline:none;
}
.searchbox input:focus{border-color:#93c5fd;box-shadow:0 0 0 4px rgba(59,130,246,.15)}
.sessions{flex:1;overflow:auto}
.session{
  padding:12px 14px;border-bottom:1px solid #f1f5f9;cursor:pointer;
  display:flex;gap:10px;align-items:flex-start;
}
.session:hover{background:#f8fafc}
.session.active{background:#eef2ff}
.session .title{font-weight:800;line-height:1.2}
.session .meta{font-size:12px;color:var(--muted);display:flex;gap:8px;align-items:center;flex-wrap:wrap}
.status-waiting{color:var(--warn);font-weight:800}
.status-open{color:var(--ok);font-weight:800}
.status-closed{color:var(--muted);font-weight:800}
.session .actions{margin-left:auto;display:flex;gap:8px}
.session .actions .btn{padding:6px 10px;border-radius:10px;font-size:12px}
.main{
  flex:1;display:flex;flex-direction:column;min-width:0;
}
.main-head{
  padding:12px 14px;background:#fff;border-bottom:1px solid var(--border);
  display:flex;align-items:center;justify-content:space-between;gap:12px;
}
.main-title{font-weight:900;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.chat{
  flex:1;overflow:auto;background:#fff;padding:16px;
}
.bubble{
  max-width:74%;
  padding:10px 12px;border-radius:16px;font-size:14px;line-height:1.45;
  box-shadow:0 2px 10px rgba(2,6,23,.05);
  margin:0 0 10px 0;
}
.bubble.user{background:#e5e7eb;margin-left:auto}
.bubble.agent{background:linear-gradient(135deg,var(--primary2),var(--primary));color:#fff}
.time{
  font-size:10px;opacity:.8;margin-top:6px;text-align:right
}
.composer{
  padding:12px;background:#fff;border-top:1px solid var(--border);
  display:flex;gap:10px;align-items:flex-end;
}
.composer textarea{
  flex:1;border:1px solid #cbd5e1;border-radius:14px;padding:10px 12px;font-size:14px;
  resize:none;min-height:44px;max-height:160px;outline:none;
}
.composer textarea:focus{border-color:#93c5fd;box-shadow:0 0 0 4px rgba(59,130,246,.15)}
.hamb{display:none}
@media(max-width: 980px){
  .sidebar{position:absolute;left:0;top:0;bottom:0;z-index:20;transform:translateX(-105%);transition:transform .22s ease}
  .sidebar.open{transform:translateX(0)}
  .hamb{display:inline-flex}
}