:root {
  color-scheme: light;
  --bg: #f4f4f2;
  --surface: #fcfcfb;
  --border: #e2e1dc;
  --grid: #ecebe6;
  --text: #0b0b0b;
  --text-2: #52514e;
  --muted: #7a7974;
  --accent: #2a78d6;
  --series-1: #2a78d6;
  --ok-bg: #e6f4ea; --ok-fg: #1d5e2c;
  --err-bg: #fde8e7; --err-fg: #8a1c1b;
  --warn-bg: #fff4d6; --warn-fg: #6b4a00;
}
@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;
    --bg: #111110;
    --surface: #1a1a19;
    --border: #2e2e2c;
    --grid: #262624;
    --text: #ffffff;
    --text-2: #c3c2b7;
    --muted: #8f8e86;
    --accent: #3987e5;
    --series-1: #3987e5;
    --ok-bg: #16301d; --ok-fg: #9fdcaf;
    --err-bg: #3a1716; --err-fg: #f3aaa9;
    --warn-bg: #362a0b; --warn-fg: #f1d388;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font: 15px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
a { color: var(--accent); }
header.top {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 12px 16px; background: var(--surface); border-bottom: 1px solid var(--border);
}
header.top nav { display: flex; gap: 16px; align-items: center; }
header.top .marca { font-weight: 700; text-decoration: none; color: var(--text); }
main { max-width: 1100px; margin: 0 auto; padding: 16px; }
.tarjeta {
  background: var(--surface); border: 1px solid var(--border); border-radius: 10px;
  padding: 16px; margin-bottom: 16px;
}
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 12px; }
.stat .num { font-size: 20px; font-weight: 650; white-space: nowrap; }
.stat .lbl { color: var(--text-2); font-size: 13px; }
.aviso { padding: 10px 14px; border-radius: 8px; margin-bottom: 12px; }
.aviso.ok { background: var(--ok-bg); color: var(--ok-fg); }
.aviso.error { background: var(--err-bg); color: var(--err-fg); }
.aviso.warn { background: var(--warn-bg); color: var(--warn-fg); }
.tabla-scroll { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
th, td { padding: 8px 10px; border-bottom: 1px solid var(--border); text-align: left; vertical-align: middle; }
th { color: var(--text-2); font-weight: 600; font-size: 13px; }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }
.sub { color: var(--muted); font-size: 13px; }
.chip { display: inline-block; white-space: nowrap; font-size: 13px; }
button, .boton {
  font: inherit; cursor: pointer; border-radius: 8px; padding: 8px 14px;
  border: 1px solid var(--border); background: var(--surface); color: var(--text);
}
button.primario { background: var(--accent); border-color: var(--accent); color: #fff; }
button.link { border: 0; background: none; color: var(--accent); padding: 0; }
form.en-linea { display: inline; margin: 0; }
label { display: block; font-weight: 600; margin: 12px 0 4px; }
input, textarea {
  width: 100%; font: inherit; padding: 8px 10px; border-radius: 8px;
  border: 1px solid var(--border); background: var(--bg); color: var(--text);
}
textarea { min-height: 180px; font-family: ui-monospace, Consolas, monospace; font-size: 14px; }
.rejilla { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 12px; }
.ayuda { color: var(--muted); font-size: 13px; font-weight: 400; }
.login { max-width: 360px; margin: 10vh auto; }
.spark path { fill: none; stroke: var(--series-1); stroke-width: 1.5; }
.spark circle { fill: var(--series-1); }
.grafica { position: relative; }
.grafica svg { width: 100%; height: auto; display: block; }
.grafica .linea { fill: none; stroke: var(--series-1); stroke-width: 2; }
.grafica .punto { fill: var(--series-1); stroke: var(--surface); stroke-width: 2; }
.grafica .rejilla-y { stroke: var(--grid); stroke-width: 1; }
.grafica text { fill: var(--muted); font-size: 12px; font-variant-numeric: tabular-nums; }
.grafica .guia { stroke: var(--text-2); stroke-width: 1; stroke-dasharray: 3 3; }
.tooltip {
  position: absolute; pointer-events: none; background: var(--surface); color: var(--text);
  border: 1px solid var(--border); border-radius: 8px; padding: 6px 10px; font-size: 13px;
  box-shadow: 0 4px 14px rgb(0 0 0 / .12); white-space: nowrap; transform: translate(-50%, -115%);
}
.tooltip b { font-variant-numeric: tabular-nums; }
@media (max-width: 640px) {
  .ocultar-movil { display: none; }
  th, td { padding: 8px 6px; }
}