:root {
  color-scheme: light;
  --surface-1:      #fcfcfb;
  --page:           #f9f9f7;
  --text-primary:   #0b0b0b;
  --text-secondary: #52514e;
  --text-muted:     #898781;
  --grid:           #e1e0d9;
  --baseline:       #c3c2b7;
  --border:         rgba(11,11,11,0.10);
  --series-1: #2a78d6; /* blue */
  --series-2: #eb6834; /* orange */
  --series-3: #1baf7a; /* aqua */
  --series-4: #eda100; /* yellow */
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --surface-1: #1a1a19; --page: #0d0d0d;
    --text-primary: #ffffff; --text-secondary: #c3c2b7; --text-muted: #898781;
    --grid: #2c2c2a; --baseline: #383835; --border: rgba(255,255,255,0.10);
    --series-1: #3987e5; --series-2: #d95926; --series-3: #199e70; --series-4: #c98500;
  }
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --surface-1: #1a1a19; --page: #0d0d0d;
  --text-primary: #ffffff; --text-secondary: #c3c2b7; --text-muted: #898781;
  --grid: #2c2c2a; --baseline: #383835; --border: rgba(255,255,255,0.10);
  --series-1: #3987e5; --series-2: #d95926; --series-3: #199e70; --series-4: #c98500;
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--page); color: var(--text-primary);
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
}
.wrap { padding: 20px clamp(16px, 4vw, 32px) 48px; }

header.top {
  display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 12px;
  margin-bottom: 4px;
}
h1 { font-size: 20px; font-weight: 600; margin: 0; }
.subtitle { color: var(--text-secondary); font-size: 13px; margin: 4px 0 20px; }
.logout { color: var(--text-secondary); font-size: 13px; text-decoration: none; }
.logout:hover { text-decoration: underline; }

nav.tabs { display: flex; gap: 4px; margin-bottom: 20px; border-bottom: 1px solid var(--border); }
nav.tabs button {
  font: inherit; font-size: 14px; padding: 10px 16px; border: none; background: none;
  color: var(--text-secondary); cursor: pointer; border-bottom: 2px solid transparent; margin-bottom: -1px;
}
nav.tabs button.activo { color: var(--series-1); border-bottom-color: var(--series-1); font-weight: 600; }
nav.tabs button:hover { color: var(--text-primary); }

.filtros { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 20px; }
.filtros button {
  font: inherit; font-size: 13px; padding: 7px 14px; border-radius: 20px;
  border: 1px solid var(--border); background: var(--surface-1); color: var(--text-secondary);
  cursor: pointer;
}
.filtros button:hover { background: var(--grid); }
.filtros button.activo { background: var(--series-1); color: #fff; border-color: var(--series-1); font-weight: 600; }

.kpis { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 12px; margin-bottom: 20px; }
.kpi {
  background: var(--surface-1); border: 1px solid var(--border); border-radius: 10px;
  padding: 16px 18px;
}
.kpi .label { font-size: 12px; color: var(--text-secondary); margin-bottom: 6px; }
.kpi .valor { font-size: 26px; font-weight: 600; font-variant-numeric: proportional-nums; }
.kpi .valor.alerta { color: var(--series-2); }

.grid-charts { display: grid; grid-template-columns: repeat(auto-fit, minmax(340px, 1fr)); gap: 14px; }
.card {
  background: var(--surface-1); border: 1px solid var(--border); border-radius: 10px;
  padding: 16px 18px; min-width: 0;
}
.card h2 { font-size: 14px; font-weight: 600; margin: 0 0 12px; }
.card.wide { grid-column: 1 / -1; }
.chart-wrap { position: relative; height: 260px; }
.chart-wrap.tall { height: 320px; }

table.tabla { width: 100%; border-collapse: collapse; font-size: 13px; }
table.tabla th { text-align: left; color: var(--text-secondary); font-weight: 600; padding: 6px 8px; border-bottom: 1px solid var(--border); }
table.tabla td { padding: 6px 8px; border-bottom: 1px solid var(--grid); }
table.tabla td.num { text-align: right; font-variant-numeric: tabular-nums; }

.seccion { display: none; }
.seccion.activa { display: block; }

/* Login */
.login-wrap { min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: 16px; }
.login-card {
  background: var(--surface-1); border: 1px solid var(--border); border-radius: 12px;
  padding: 32px; width: 100%; max-width: 340px;
}
.login-card h1 { font-size: 18px; margin: 0 0 20px; }
.login-card label { display: block; font-size: 13px; color: var(--text-secondary); margin: 14px 0 6px; }
.login-card input {
  width: 100%; font: inherit; font-size: 14px; padding: 9px 12px; border-radius: 6px;
  border: 1px solid var(--border); background: var(--page); color: var(--text-primary);
}
.login-card button {
  width: 100%; margin-top: 20px; font: inherit; font-size: 14px; font-weight: 600; padding: 10px;
  border-radius: 6px; border: none; background: var(--series-1); color: #fff; cursor: pointer;
}
.login-card .error { color: var(--series-2); font-size: 13px; margin-top: 12px; }