:root {
  --bg: #0f172a;
  --panel: #1e293b;
  --panel-2: #334155;
  --text: #f1f5f9;
  --muted: #94a3b8;
  --accent: #38bdf8;
  --wmc: #f59e0b;
  --ts: #10b981;
  --danger: #ef4444;
  --ok: #22c55e;
  --warn: #facc15;
  --border: #334155;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif; background: var(--bg); color: var(--text); }
a { color: var(--accent); }

.topbar { display: flex; justify-content: space-between; align-items: center; padding: 12px 24px; background: var(--panel); border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 10; }
.brand strong { font-size: 18px; }
.brand .sub { display: block; font-size: 12px; color: var(--muted); }
.nav { display: flex; gap: 12px; align-items: center; }
.nav .hello { color: var(--muted); font-size: 13px; }
.nav button, .nav a { background: var(--panel-2); color: var(--text); border: 1px solid var(--border); padding: 6px 12px; border-radius: 6px; text-decoration: none; font-size: 13px; cursor: pointer; }
.nav button:hover, .nav a:hover { background: #475569; }

main { padding: 16px 24px 32px; max-width: 1440px; margin: 0 auto; }

.kpis { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 16px; margin-bottom: 20px; }
.kpi { background: var(--panel); border: 1px solid var(--border); border-radius: 10px; padding: 16px; }
.kpi-label { color: var(--muted); font-size: 12px; margin-bottom: 8px; }
.kpi-value { font-size: 28px; font-weight: 700; }
.kpi-sub { color: var(--muted); font-size: 12px; margin-top: 6px; line-height: 1.4; }
.kpi-sub .w { color: var(--wmc); }
.kpi-sub .t { color: var(--ts); }
.kpi-sub .up { color: var(--ok); }
.kpi-sub .down { color: var(--danger); }

.card { background: var(--panel); border: 1px solid var(--border); border-radius: 10px; padding: 16px; margin-bottom: 16px; }
.card-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 10px; gap: 12px; flex-wrap: wrap; }
.card-head h2 { font-size: 16px; margin: 0; }
.card-head .meta { color: var(--muted); font-size: 12px; }
.card-head select { background: var(--panel-2); color: var(--text); border: 1px solid var(--border); border-radius: 6px; padding: 4px 8px; font-size: 13px; }

.two-col { display: grid; grid-template-columns: repeat(auto-fit, minmax(420px, 1fr)); gap: 16px; }

.chart-wrap { position: relative; height: 320px; }
.chart-wrap.small { height: 220px; }

.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 13px; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--border); white-space: nowrap; }
th { color: var(--muted); font-weight: 500; font-size: 12px; text-transform: uppercase; }
td.r, th.r { text-align: right; font-variant-numeric: tabular-nums; }
.badge { display: inline-block; padding: 2px 8px; border-radius: 10px; font-size: 11px; font-weight: 600; }
.badge.WMC { background: rgba(245, 158, 11, 0.2); color: var(--wmc); }
.badge.TS { background: rgba(16, 185, 129, 0.2); color: var(--ts); }
.status { padding: 2px 8px; border-radius: 10px; font-size: 11px; font-weight: 600; }
.status.paid { background: rgba(34, 197, 94, 0.2); color: var(--ok); }
.status.partial { background: rgba(250, 204, 21, 0.2); color: var(--warn); }
.status.open { background: rgba(148, 163, 184, 0.2); color: var(--muted); }
.status.overdue { background: rgba(239, 68, 68, 0.2); color: var(--danger); }

table.mini { margin-top: 8px; font-size: 12px; }
table.mini td:first-child { color: var(--muted); }

footer { margin-top: 20px; color: var(--muted); font-size: 12px; text-align: right; }

/* Login */
.login-page { display: flex; align-items: center; justify-content: center; min-height: 100vh; background: linear-gradient(135deg, #0f172a, #1e293b); }
.login-box { background: var(--panel); border: 1px solid var(--border); border-radius: 10px; padding: 32px; width: 100%; max-width: 400px; }
.login-box h1 { margin: 0 0 8px; font-size: 24px; }
.login-box .sub { color: var(--muted); font-size: 13px; margin-bottom: 24px; }
.login-box .sub .zh { font-size: 12px; }
.login-box label { display: block; margin-bottom: 12px; font-size: 13px; color: var(--muted); }
.login-box input { display: block; width: 100%; margin-top: 4px; padding: 10px; background: var(--panel-2); color: var(--text); border: 1px solid var(--border); border-radius: 6px; font-size: 14px; }
.login-box button { width: 100%; padding: 10px; background: var(--accent); color: #0f172a; border: 0; border-radius: 6px; font-size: 14px; font-weight: 600; cursor: pointer; margin-top: 8px; }
.login-box .err { margin-top: 12px; color: var(--danger); font-size: 13px; text-align: center; }

@media (max-width: 640px) {
  .topbar { padding: 10px 12px; }
  main { padding: 12px; }
  .kpi-value { font-size: 22px; }
}