:root {
  --bg: #0f172a;
  --panel: #1e293b;
  --panel-2: #273449;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --line: #334155;
  --danger: #ef4444;
  --warn: #f59e0b;
  --ok: #22c55e;
  --info: #38bdf8;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: "Microsoft YaHei", "PingFang SC", system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
}
.topbar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 22px; background: var(--panel); border-bottom: 1px solid var(--line);
  flex-wrap: wrap; gap: 10px;
}
.title { display: flex; align-items: center; gap: 12px; }
.logo { font-size: 28px; }
.topbar h1 { font-size: 18px; margin: 0; }
#subtitle { margin: 2px 0 0; font-size: 12px; color: var(--muted); }
.actions { display: flex; align-items: center; gap: 8px; }
.actions input {
  background: var(--panel-2); border: 1px solid var(--line); color: var(--text);
  padding: 7px 10px; border-radius: 6px; width: 180px; font-size: 13px;
}
.btn {
  background: var(--panel-2); color: var(--text); border: 1px solid var(--line);
  padding: 8px 14px; border-radius: 6px; cursor: pointer; font-size: 13px;
}
.btn:hover { border-color: var(--info); }
.btn-primary { background: var(--info); color: #06283d; border: none; font-weight: 600; }
.btn:disabled { opacity: .6; cursor: default; }

.cards { display: grid; grid-template-columns: repeat(5, 1fr); gap: 14px; padding: 18px 22px; }
.card { background: var(--panel); border: 1px solid var(--line); border-radius: 10px; padding: 16px; }
.card-label { color: var(--muted); font-size: 13px; }
.card-value { font-size: 30px; font-weight: 700; margin-top: 6px; }
.card.danger .card-value { color: var(--danger); }
.card.warn .card-value { color: var(--warn); }
.card.gray .card-value { color: var(--muted); }
.card.info .card-value { color: var(--info); }

.panel { background: var(--panel); border: 1px solid var(--line); border-radius: 10px; margin: 0 22px 18px; padding: 16px; }
.panel-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 12px; flex-wrap: wrap; gap: 8px; }
.panel-head h2 { font-size: 15px; margin: 0; }
.panel-tools { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.filters { display: flex; gap: 6px; }
.chip { background: var(--panel-2); border: 1px solid var(--line); color: var(--muted); padding: 5px 12px; border-radius: 20px; cursor: pointer; font-size: 12px; }
.chip.active { color: #06283d; background: var(--info); border-color: var(--info); font-weight: 600; }
.search-input {
  background: var(--panel-2); border: 1px solid var(--line); color: var(--text);
  padding: 5px 10px; border-radius: 6px; font-size: 12px; width: 150px;
}
.search-input:focus { outline: none; border-color: var(--info); }
.search-input::placeholder { color: #64748b; }
.search-input::-webkit-search-cancel-button { -webkit-appearance: none; appearance: none; }
.btn-mini { padding: 5px 10px; font-size: 12px; }
.count { font-size: 12px; color: var(--muted); }

.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 13px; }
th, td { text-align: left; padding: 9px 10px; border-bottom: 1px solid var(--line); white-space: nowrap; }
th { color: var(--muted); font-weight: 600; position: sticky; top: 0; background: var(--panel); }
tbody tr:hover { background: var(--panel-2); }
.empty { color: var(--muted); padding: 16px; text-align: center; }

.badge { display: inline-block; padding: 2px 9px; border-radius: 20px; font-size: 12px; font-weight: 600; }
.badge.offline { background: #475569; color: #e2e8f0; }
.badge.arrears { background: rgba(239,68,68,.18); color: var(--danger); }
.badge.low { background: rgba(245,158,11,.18); color: var(--warn); }
.badge.over { background: rgba(168,85,247,.18); color: #c084fc; }
.badge.unknown { background: rgba(148,163,184,.18); color: #cbd5e1; }
.badge.ok { background: rgba(34,197,94,.16); color: var(--ok); }

.toast {
  position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%);
  background: var(--panel-2); border: 1px solid var(--line); color: var(--text);
  padding: 12px 18px; border-radius: 8px; font-size: 13px; opacity: 0; pointer-events: none;
  transition: opacity .25s; max-width: 80vw;
}
.toast.show { opacity: 1; }
.toast.err { border-color: var(--danger); color: #fecaca; }

@media (max-width: 900px) {
  .cards { grid-template-columns: repeat(2, 1fr); }
}