:root {
  /* Libro de control: resumen arriba, pestañas Facturas / Órdenes de compra / Usuarios */
  --bg: #f4f5f7;
  --surface: #ffffff;
  --ink: #17202b;
  --muted: #5d6877;
  --line: #dde1e7;
  --accent: #1d4e89;
  --accent-soft: #e6eef8;
  --ok: #1f7a4d; --ok-soft: #e3f3ea;
  --warn: #9a5b00; --warn-soft: #fdf0dc;
  --bad: #b3261e; --bad-soft: #fbe6e4;
  --neutral-soft: #eceef1;
  --font-body: "IBM Plex Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, "SF Mono", Menlo, monospace;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #11151b; --surface: #181e26; --ink: #e7ebf0; --muted: #98a3b1; --line: #2a323d;
    --accent: #7fb0ec; --accent-soft: #1c2b40;
    --ok: #6fcf9a; --ok-soft: #173326; --warn: #f0b45a; --warn-soft: #3a2b12;
    --bad: #f08a80; --bad-soft: #3b1c1a; --neutral-soft: #232a34;
    color-scheme: dark;
  }
}
* { box-sizing: border-box; }
html, body { margin: 0; }
body { background: var(--bg); color: var(--ink); font-family: var(--font-body); font-size: 14px; line-height: 1.45; }
a { color: var(--accent); }
code { font-family: var(--font-mono); font-size: 0.92em; background: var(--neutral-soft); padding: 1px 5px; border-radius: 4px; }
.wrap { max-width: 1180px; margin: 0 auto; padding: 24px 20px 48px; display: grid; gap: 16px; }
header.top { display: flex; flex-wrap: wrap; align-items: flex-end; justify-content: space-between; gap: 12px; }
h1 { font-size: 22px; margin: 0; letter-spacing: -0.01em; text-wrap: balance; }
.sub { color: var(--muted); margin: 2px 0 0; }
.actions { display: flex; gap: 8px; flex-wrap: wrap; }
form.inline { display: inline; margin: 0; }
button, .btn { font: inherit; font-weight: 500; border: 1px solid var(--line); background: var(--surface); color: var(--ink); padding: 7px 12px; border-radius: 6px; cursor: pointer; text-decoration: none; display: inline-block; }
button:hover, .btn:hover { border-color: var(--muted); }
button:disabled { opacity: 0.5; cursor: not-allowed; }
button.primary, .btn.primary { background: var(--accent); border-color: var(--accent); color: var(--surface); }
button.primary:hover { filter: brightness(1.08); }
button.danger { color: var(--bad); }
button.danger.armed { background: var(--bad); color: var(--surface); border-color: var(--bad); }
button.link { border: none; background: none; color: var(--accent); padding: 2px 4px; }
button.link.danger { color: var(--bad); }
button:focus-visible, .btn:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

.me { display: flex; align-items: center; gap: 8px; background: var(--surface); border: 1px solid var(--line); border-radius: 20px; padding: 5px 12px; }
.me .nm { font-weight: 600; font-size: 13px; }
.role { font-size: 11px; font-weight: 600; padding: 1px 7px; border-radius: 10px; background: var(--neutral-soft); color: var(--muted); }
.role.admin { background: var(--accent); color: var(--surface); }

.banner { padding: 10px 14px; border-radius: 6px; font-size: 13px; }
.banner.warn { background: var(--warn-soft); color: var(--warn); }
.banner.info { background: var(--accent-soft); color: var(--accent); }
.banner[hidden] { display: none; }

.tiles { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 12px; }
.tile { background: var(--surface); border: 1px solid var(--line); border-radius: 8px; padding: 14px 16px; display: grid; gap: 4px; }
.tile .k { color: var(--muted); font-size: 12px; font-weight: 500; text-transform: uppercase; letter-spacing: 0.04em; }
.tile .v { font-size: 22px; font-weight: 600; font-variant-numeric: tabular-nums; }
.tile .h { color: var(--muted); font-size: 12px; }
.tile.alert { border-left: 4px solid var(--bad); }
.tile.caution { border-left: 4px solid var(--warn); }

.panel { background: var(--surface); border: 1px solid var(--line); border-radius: 8px; overflow: hidden; }
.tabs { display: flex; flex-wrap: wrap; border-bottom: 1px solid var(--line); padding: 0 8px; }
.tab { border: none; border-bottom: 2px solid transparent; border-radius: 0; background: none; padding: 12px 14px; color: var(--muted); font-weight: 600; }
.tab[aria-selected="true"] { color: var(--ink); border-bottom-color: var(--accent); }
.tab .count { font-family: var(--font-mono); font-size: 12px; background: var(--neutral-soft); padding: 1px 6px; border-radius: 10px; margin-left: 6px; color: var(--muted); }
.toolbar { display: flex; flex-wrap: wrap; gap: 8px; padding: 12px; border-bottom: 1px solid var(--line); align-items: center; }
.toolbar input[type="search"] { flex: 1 1 220px; }
input, select, textarea { font: inherit; color: var(--ink); background: var(--surface); border: 1px solid var(--line); border-radius: 6px; padding: 7px 9px; min-width: 0; }
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 13.5px; }
th, td { text-align: left; padding: 9px 12px; border-bottom: 1px solid var(--line); vertical-align: middle; white-space: nowrap; }
th { font-size: 11.5px; text-transform: uppercase; letter-spacing: 0.04em; color: var(--muted); font-weight: 600; background: var(--bg); }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; }
.mono { font-family: var(--font-mono); font-size: 12.5px; }
.muted { color: var(--muted); }
.small { font-size: 12.5px; }
tr:hover td { background: color-mix(in srgb, var(--accent-soft) 45%, transparent); }
td select.oc-pick { padding: 4px 6px; font-size: 13px; max-width: 200px; }
td select.oc-pick.none { color: var(--warn); border-color: var(--warn); border-style: dashed; }
.pill { display: inline-block; font-size: 12px; font-weight: 600; padding: 2px 8px; border-radius: 10px; }
.pill.enviada, .pill.abierta { background: var(--accent-soft); color: var(--accent); }
.pill.pagada, .pill.completa, .pill.activo { background: var(--ok-soft); color: var(--ok); }
.pill.vencida, .pill.excedida { background: var(--bad-soft); color: var(--bad); }
.pill.cancelada { background: var(--neutral-soft); color: var(--muted); text-decoration: line-through; }
.pill.inactivo { background: var(--neutral-soft); color: var(--muted); }
.pill.pendiente { background: var(--warn-soft); color: var(--warn); }
.empty { padding: 36px 16px; text-align: center; color: var(--muted); }
.row-actions { display: flex; gap: 2px; justify-content: flex-end; }

.bar { height: 6px; background: var(--neutral-soft); border-radius: 3px; overflow: hidden; width: 120px; }
.bar > span { display: block; height: 100%; background: var(--accent); }
.bar.full > span { background: var(--ok); }
.bar.over > span { background: var(--bad); }
.oc-detail td { background: var(--bg); white-space: normal; }
.oc-detail ul { margin: 0; padding: 0; list-style: none; display: grid; gap: 4px; }
.oc-detail li { display: flex; gap: 14px; flex-wrap: wrap; align-items: center; }

dialog { border: 1px solid var(--line); border-radius: 10px; padding: 0; width: min(640px, calc(100vw - 32px)); background: var(--surface); color: var(--ink); }
dialog::backdrop { background: rgba(10, 15, 25, 0.45); }
dialog form { display: grid; gap: 14px; padding: 20px; }
dialog h2 { margin: 0; font-size: 17px; }
.grid2 { display: grid; grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); gap: 12px; }
label.f { display: grid; gap: 4px; font-size: 12.5px; font-weight: 500; color: var(--muted); }
label.f input, label.f select, label.f textarea { color: var(--ink); font-size: 14px; }
.inline-row { display: flex; gap: 8px; }
.inline-row input { flex: 1; }
.calc { background: var(--bg); border-radius: 6px; padding: 10px 12px; display: flex; gap: 18px; flex-wrap: wrap; font-variant-numeric: tabular-nums; }
.calc b { font-weight: 600; }
.meta { font-size: 12px; color: var(--muted); margin: -4px 0 0; }
.form-foot { display: flex; justify-content: space-between; gap: 8px; flex-wrap: wrap; }
.form-err { color: var(--bad); font-size: 13px; min-height: 1em; }
.toast { position: fixed; bottom: 18px; left: 50%; transform: translateX(-50%); background: var(--ink); color: var(--surface); padding: 9px 14px; border-radius: 6px; font-size: 13px; opacity: 0; transition: opacity .2s; pointer-events: none; }
.toast.show { opacity: 1; }

/* Páginas de acceso (login, instalación, contraseña) */
body.auth { min-height: 100vh; display: grid; place-items: center; padding: 24px 16px; }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: 10px; padding: 28px; width: min(420px, 100%); display: grid; gap: 12px; }
.card p { margin: 0; }
.stack { display: grid; gap: 12px; }
.err { color: var(--bad); background: var(--bad-soft); padding: 8px 10px; border-radius: 6px; }
.ok { color: var(--ok); background: var(--ok-soft); padding: 8px 10px; border-radius: 6px; }
.warn { color: var(--warn); background: var(--warn-soft); padding: 8px 10px; border-radius: 6px; }

@media (prefers-reduced-motion: reduce) { .toast { transition: none; } }
@media (max-width: 520px) { .wrap { padding: 16px 16px 40px; } .tile .v { font-size: 19px; } }