/* ============================================================
     CONFIGURACIÓN — edita solo esto para conectar tu hoja de cálculo
     ============================================================ */
  :root {
    --bg: #12161f;
    --panel: #1a212c;
    --panel-alt: #1f2733;
    --border: #2a3140;
    --text: #e7ecf3;
    --text-dim: #8c97a8;
    --text-faint: #5c6779;

    --c-operativo: #4cb782;
    --c-inoperativo: #d9695f;
    --c-falla: #dba13f;
    --c-lento: #6f8ce0;

    --c-enuso: #4fa3d1;
    --c-disponible: #3a4353;

    --btn-connect-bg: #24384a;
    --btn-connect-border: #345b78;

    --banner-bg: #fbf2dd;
    --banner-border: #ffce9d;
    --banner-text: #873534;
    --banner-code-bg: #1a1211;
  }

  /* El navegador/SO puede pedir explícitamente tema oscuro; se deja
     igual al :root por claridad, y sirve de ancla si en el futuro el
     :root cambia de base. */
  @media (prefers-color-scheme: dark) {
    :root {
      --bg: #12161f;
      --panel: #1a212c;
      --panel-alt: #1f2733;
      --border: #2a3140;
      --text: #e7ecf3;
      --text-dim: #8c97a8;
      --text-faint: #5c6779;

      --c-enuso: #4fa3d1;
      --c-disponible: #3a4353;

      --btn-connect-bg: #24384a;
      --btn-connect-border: #345b78;

      --banner-bg: #2f291d;
      --banner-border: #f78d24;
      --banner-text: #ba7a79;
      --banner-code-bg: #1a1211;
    }
  }

  @media (prefers-color-scheme: light) {
    :root {
      --bg: #f4f5f7;
      --panel: #ffffff;
      --panel-alt: #eef1f5;
      --border: #dde1e8;
      --text: #1a2029;
      --text-dim: #5c6779;
      --text-faint: #8c97a8;

      --c-operativo: #2f9e5f;
      --c-inoperativo: #c8493d;
      --c-falla: #b1791f;
      --c-lento: #5670cf;

      --c-enuso: #2f7fb0;
      --c-disponible: #d3d9e2;

      --btn-connect-bg: #dbe9f5;
      --btn-connect-border: #a9c7dd;
    }
  }

  * { box-sizing: border-box; }

  body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: 'IBM Plex Sans', system-ui, sans-serif;
    -webkit-font-smoothing: antialiased;
  }

  .num, .stat-value, .totalval, td.num-cell {
    font-family: 'IBM Plex Mono', monospace;
  }

  a { color: inherit; }

  .wrap {
    max-width: 1120px;
    margin: 0 auto;
    padding: 32px 24px 64px;
  }

  /* ---------- header ---------- */
  header {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    flex-wrap: wrap;
    gap: 16px;
    margin-bottom: 28px;
    padding: 12px 0 20px;
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 20;
    background: var(--bg);
  }

  h1 {
    font-size: 22px;
    font-weight: 600;
    margin: 0 0 4px;
    letter-spacing: -0.01em;
  }

  .sync-line {
    font-size: 13px;
    color: var(--text-dim);
    display: flex;
    align-items: center;
    gap: 8px;
  }

  .dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--c-operativo);
    flex-shrink: 0;
  }
  .dot.err { background: var(--c-inoperativo); }
  .dot.loading { background: var(--text-faint); animation: pulse 1.2s infinite ease-in-out; }

  @keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: .3; } }

  .header-actions {
    display: flex;
    gap: 10px;
  }

  button#refresh-btn, button#connect-btn {
    background: var(--panel-alt);
    border: 1px solid var(--border);
    color: var(--text);
    font-family: inherit;
    font-size: 13px;
    padding: 9px 16px;
    border-radius: 6px;
    cursor: pointer;
    transition: border-color .15s ease;
  }
  button#connect-btn {
    background: var(--btn-connect-bg);
    border-color: var(--btn-connect-border);
  }
  button#refresh-btn:hover, button#connect-btn:hover { border-color: var(--text-faint); }
  button#refresh-btn:active, button#connect-btn:active { transform: translateY(1px); }
  button#refresh-btn:disabled { opacity: .5; cursor: default; }

  /* ---------- overview strip ---------- */
  .overview {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 14px;
    margin-bottom: 32px;
  }

  .stat-card {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 18px 20px;
    cursor: pointer;
    transition: border-color .15s ease, transform .1s ease;
  }
  .stat-card:hover { border-color: var(--text-faint); }
  .stat-card:active { transform: translateY(1px); }

  .stat-card-top {
    display: flex;
    align-items: center;
    gap: 16px;
  }

  .donut {
    flex-shrink: 0;
  }

  .stat-label {
    font-size: 12.5px;
    color: var(--text-dim);
    margin-bottom: 6px;
  }

  .stat-value {
    font-size: 30px;
    font-weight: 500;
    line-height: 1;
  }

  .donut-legend {
    margin-top: 14px;
    display: flex;
    flex-direction: column;
    gap: 6px;
  }

  .donut-legend .legend-item {
    font-size: 12.5px;
  }

  .donut-legend .num {
    color: var(--text);
    margin-left: 4px;
  }

  /* ---------- category panels ---------- */
  .categories {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .panel {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 20px;
    display: flex;
    flex-direction: column;
  }

  .panel-head {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 4px;
  }

  .panel-icon {
    width: 20px;
    height: 20px;
    color: var(--text-dim);
    flex-shrink: 0;
  }

  .panel-title {
    font-size: 15px;
    font-weight: 600;
  }

  .panel-total {
    margin-left: auto;
    font-size: 20px;
    font-weight: 500;
  }

  .panel-total-label {
    font-size: 11px;
    color: var(--text-faint);
    margin-left: 6px;
  }

  /* stacked bar */
  .bar-track {
    display: flex;
    width: 100%;
    height: 10px;
    border-radius: 5px;
    overflow: hidden;
    margin: 18px 0 14px;
    background: var(--panel-alt);
  }

  .bar-seg { height: 100%; transition: width .4s ease; }

  .legend {
    display: flex;
    flex-wrap: wrap;
    gap: 10px 16px;
    margin-bottom: 16px;
  }

  .legend-item {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    color: var(--text-dim);
  }

  .swatch {
    width: 8px;
    height: 8px;
    border-radius: 2px;
    flex-shrink: 0;
  }

  /* data table */
  table {
    width: 100%;
    border-collapse: collapse;
    margin-top: auto;
    font-size: 13px;
  }

  thead th {
    text-align: right;
    font-weight: 500;
    color: var(--text-faint);
    font-size: 11px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border);
  }
  thead th:first-child { text-align: left; }

  tbody td {
    padding: 8px 0;
    border-bottom: 1px solid var(--border);
    text-align: right;
    color: var(--text-dim);
  }
  tbody td:first-child {
    text-align: left;
    color: var(--text);
    display: flex;
    align-items: center;
    gap: 7px;
  }
  tbody tr:last-child td { border-bottom: none; }

  tbody td.num-cell { color: var(--text); }

  .empty-note {
    color: var(--text-faint);
    font-size: 12.5px;
    padding: 6px 0;
  }

  .panel-observation {
    display: flex;
    flex-direction: column;
    gap: 4px;
    margin-top: 18px;
    padding: 10px 12px;
    border-left: 3px solid var(--banner-border);
    border-radius: 6px;
    background: var(--banner-bg);
    color: var(--banner-text);
    font-size: 12.5px;
    line-height: 1.45;
  }

  .panel-observation-label {
    color: var(--text-faint);
    font-size: 10px;
    font-weight: 600;
    letter-spacing: .04em;
    text-transform: uppercase;
  }

  /* ---------- error / setup states ---------- */
  #status-banner {
    display: none;
    background: var(--banner-bg);
    border: 1px solid var(--banner-border);
    color: var(--banner-text);
    padding: 14px 16px;
    border-radius: 8px;
    font-size: 13px;
    margin-bottom: 24px;
    line-height: 1.5;
  }
  #status-banner code {
    background: var(--banner-code-bg);
    padding: 1px 5px;
    border-radius: 4px;
    font-family: 'IBM Plex Mono', monospace;
  }

  footer {
    margin-top: 36px;
    font-size: 12px;
    color: var(--text-faint);
  }

  @media (max-width: 860px) {
    .overview { grid-template-columns: repeat(2, 1fr); }
  }

  @keyframes panel-highlight-flash {
    0% { box-shadow: 0 0 0 0 rgba(79, 163, 209, 0.55); border-color: var(--c-enuso); }
    100% { box-shadow: 0 0 0 10px rgba(79, 163, 209, 0); border-color: var(--border); }
  }

  .panel.highlight {
    animation: panel-highlight-flash 1.1s ease-out;
  }

  /* ---------- botón flotante: volver arriba ---------- */
  #back-to-top {
    position: fixed;
    right: 24px;
    bottom: 24px;
    width: 46px;
    height: 46px;
    border-radius: 50%;
    background: var(--panel);
    border: 1px solid var(--border);
    color: var(--text);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: 0 6px 18px rgba(0, 0, 0, 0.25);
    opacity: 0;
    transform: translateY(10px);
    pointer-events: none;
    transition: opacity .2s ease, transform .2s ease, border-color .15s ease;
    z-index: 25;
  }

  #back-to-top.visible {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
  }

  #back-to-top:hover { border-color: var(--text-faint); }
  #back-to-top:active { transform: translateY(1px); }