:root {
  --bg: #0f172a;
  --panel: #1e293b;
  --panel-2: #273449;
  --border: #334155;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --accent: #38bdf8;
  --accent-2: #fbbf24;
  --good: #22c55e;
  --bad: #ef4444;
  --shadow: 0 1px 3px rgba(0,0,0,.3), 0 8px 24px rgba(0,0,0,.2);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, "Segoe UI", "Sarabun", "Noto Sans Thai", Tahoma, sans-serif;
  font-size: 14px;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 18px 24px;
  background: linear-gradient(135deg, #0c1224, #1e293b);
  border-bottom: 1px solid var(--border);
}
.brand { display: flex; align-items: center; gap: 14px; }
.brand h1 { margin: 0; font-size: 20px; letter-spacing: .3px; }
.brand .sub { margin: 2px 0 0; color: var(--muted); font-size: 12px; }
.logo {
  width: 44px; height: 44px;
  border-radius: 10px;
  display: grid; place-items: center;
  font-weight: 700;
  background: linear-gradient(135deg, var(--accent), #6366f1);
  color: #0b1220;
}

.controls { display: flex; align-items: center; gap: 12px; }
.controls label { color: var(--muted); font-size: 12px; }
.controls select, .controls button, .controls input[type="date"] {
  background: var(--panel-2);
  color: var(--text);
  border: 1px solid var(--border);
  padding: 7px 10px;
  border-radius: 8px;
  font-size: 13px;
  cursor: pointer;
  color-scheme: dark;
}
.controls button:hover { background: #324154; }
.controls .divider {
  display: inline-block;
  width: 1px;
  height: 24px;
  background: var(--border);
  margin: 0 2px;
}
.controls #apply-range { background: #1e40af; border-color: #2563eb; }
.controls #apply-range:hover { background: #2563eb; }
.controls.custom-active #period { opacity: 0.5; }

.kpis {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  padding: 20px 24px 0;
}
.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 18px;
  box-shadow: var(--shadow);
}
.kpi .label { color: var(--muted); font-size: 12px; text-transform: uppercase; letter-spacing: .8px; }
.kpi .value { font-size: 28px; font-weight: 700; margin-top: 6px; }
.kpi .delta { margin-top: 10px; color: var(--muted); font-size: 12px; }
.delta .up { color: var(--good); }
.delta .down { color: var(--bad); }

.grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 16px;
  padding: 16px 24px 32px;
}
.chart-card h2, .table-card h2 {
  margin: 0 0 12px;
  font-size: 14px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 1px;
}
.chart-card canvas { width: 100% !important; height: 320px !important; }
.wide { grid-column: 1 / -1; }
.grid .chart-card.wide { grid-column: 1 / -1; }
.grid > .chart-card:not(.wide) { grid-column: 2 / 3; grid-row: 1; }
.grid > .table-card { grid-column: 1 / -1; }

@media (max-width: 1100px) {
  .kpis { grid-template-columns: repeat(2, 1fr); }
  .grid { grid-template-columns: 1fr; }
  .grid .chart-card.wide,
  .grid > .chart-card:not(.wide),
  .grid > .table-card { grid-column: 1 / -1; grid-row: auto; }
}

table {
  width: 100%;
  border-collapse: collapse;
}
th, td {
  text-align: left;
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  font-size: 13px;
}
th { color: var(--muted); font-weight: 600; font-size: 12px; text-transform: uppercase; letter-spacing: .6px; }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; }
tbody tr:hover { background: rgba(255,255,255,.03); }

footer {
  padding: 12px 24px 24px;
  color: var(--muted);
  font-size: 12px;
}
#status.error { color: var(--bad); }
#status.ok { color: var(--good); }