:root {
  --bg: #f5f6f8;
  --panel: #ffffff;
  --border: #e2e6ec;
  --text: #1f2933;
  --muted: #6b7785;
  --accent: #2563eb;
  --accent-soft: #e0ebff;
  --good: #16a34a;
  --warn: #d97706;
  --bad:  #dc2626;
  --shadow: 0 1px 2px rgba(15,23,42,.04), 0 4px 12px rgba(15,23,42,.04);
}
* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  display: grid;
  grid-template-columns: 240px 1fr;
}

/* ---- Sidebar ---- */
.sidebar {
  background: #0f172a;
  color: #cbd5e1;
  display: flex;
  flex-direction: column;
  padding: 20px 12px;
  position: sticky;
  top: 0;
  height: 100vh;
}
.brand { display: flex; gap: 12px; align-items: center; margin-bottom: 28px; padding: 0 8px; }
.brand-mark {
  height: 38px; width: auto; object-fit: contain; display: block;
}
.brand-title { color: #fff; font-weight: 700; }
.brand-sub { color: #94a3b8; font-size: 12px; }

.sidebar nav { display: flex; flex-direction: column; gap: 2px; }
.sidebar nav a {
  display: block; padding: 9px 12px; border-radius: 8px;
  color: #cbd5e1; text-decoration: none; font-size: 14px; font-weight: 500;
}
.sidebar nav a:hover { background: rgba(255,255,255,.06); color: #fff; }
.sidebar nav a.active { background: var(--accent); color: #fff; }
.sidebar nav a.nav-highlight {
  background: linear-gradient(135deg, rgba(37,99,235,.22), rgba(37,99,235,.08));
  color: #ffffff; font-weight: 700; letter-spacing: .01em;
  text-shadow: 0 0 8px rgba(147,197,253,.45);
  border: 1px solid rgba(96,165,250,.35);
  box-shadow: 0 0 0 1px rgba(37,99,235,.10), 0 0 12px rgba(37,99,235,.18);
}
.sidebar nav a.nav-highlight:hover { background: rgba(37,99,235,.32); color: #fff; }
.sidebar nav a.nav-highlight.active {
  background: var(--accent); color: #fff;
  border-color: transparent; box-shadow: 0 0 0 2px rgba(96,165,250,.4);
}
.sidebar nav .nav-section {
  margin-top: 22px; padding: 0 12px 6px;
  color: #64748b; font-size: 11px; font-weight: 600;
  text-transform: uppercase; letter-spacing: .08em;
  border-top: 1px solid rgba(255,255,255,.08); padding-top: 14px;
}
.sidebar-foot { margin-top: auto; padding: 12px; color: #cbd5e1; }
.sidebar-foot .foot-line { font-size: 13px; line-height: 1.35; }
.sidebar-foot .foot-sub  { font-size: 11px; color: #64748b; margin-top: 2px; }

/* ---- Topbar / main ---- */
main { padding: 24px 28px 60px; max-width: 100%; min-width: 0; }
.topbar { display: flex; justify-content: space-between; align-items: center; margin-bottom: 18px; }
.topbar h1 { font-size: 22px; margin: 0; }
.actions { display: flex; gap: 8px; }

button, .btn {
  border: 1px solid var(--border); background: var(--panel); color: var(--text);
  padding: 7px 12px; border-radius: 8px; font-size: 13px; font-weight: 500; cursor: pointer;
}
button:hover, .btn:hover { background: #f0f3f8; }
button.primary { background: var(--accent); color: white; border-color: transparent; }
button.primary:hover { background: #1d4ed8; }
button.ghost { background: transparent; color: var(--accent); border-color: transparent; }

/* ---- KPI cards ---- */
.kpi-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); gap: 14px; margin-bottom: 18px; }
.kpi {
  background: var(--panel); border: 1px solid var(--border); border-radius: 12px;
  padding: 14px 16px; box-shadow: var(--shadow);
}
.kpi .lbl { font-size: 12px; color: var(--muted); text-transform: uppercase; letter-spacing: .04em; }
.kpi .val { font-size: 26px; font-weight: 700; margin-top: 4px; }
.kpi .sub { font-size: 12px; color: var(--muted); margin-top: 4px; }
.kpi.warn .val { color: var(--warn); }
.kpi.bad .val { color: var(--bad); }
.kpi.good .val { color: var(--good); }

/* ---- Panel and charts ---- */
.panel {
  background: var(--panel); border: 1px solid var(--border); border-radius: 12px;
  padding: 16px; box-shadow: var(--shadow); margin-bottom: 16px;
}
.panel h2 { font-size: 14px; margin: 0 0 12px; color: var(--muted); text-transform: uppercase; letter-spacing: .04em; }
.row { display: grid; gap: 16px; }
.row.cols-2 { grid-template-columns: 1fr 1fr; }
.row.cols-3 { grid-template-columns: 1fr 1fr 1fr; }
@media (max-width: 1100px) { .row.cols-2, .row.cols-3 { grid-template-columns: 1fr; } }
.chart-box { position: relative; height: 320px; }
.chart-box.chart-tall { height: 460px; }

/* ---- Resumen view ---- */
.resumen-top {
  display: grid; grid-template-columns: 1fr auto; gap: 16px;
  align-items: stretch; margin-bottom: 18px;
}
.resumen-filters {
  display: flex; flex-wrap: wrap; gap: 10px; align-items: center;
  background: var(--panel); border: 1px solid var(--border);
  border-radius: 12px; padding: 12px 14px; box-shadow: var(--shadow);
}
.resumen-filters select {
  padding: 8px 10px; border: 1px solid var(--border); border-radius: 8px;
  font-size: 13px; min-width: 220px; background: #fff; color: var(--text);
}
.resumen-kpis { display: flex; gap: 12px; }
.kpi-big {
  background: var(--panel); border: 1px solid var(--border); border-radius: 12px;
  padding: 14px 22px; box-shadow: var(--shadow);
  display: flex; flex-direction: column; justify-content: center; min-width: 180px;
}
.kpi-big .lbl { font-size: 12px; color: var(--muted); text-transform: uppercase; letter-spacing: .04em; }
.kpi-big .val { font-size: 32px; font-weight: 700; margin-top: 4px; font-variant-numeric: tabular-nums; }
@media (max-width: 900px) {
  .resumen-top { grid-template-columns: 1fr; }
  .resumen-kpis { flex-wrap: wrap; }
}

/* ---- Filtros ---- */
.filters {
  display: flex; flex-wrap: wrap; gap: 10px; align-items: end;
  background: var(--panel); border: 1px solid var(--border);
  border-radius: 12px; padding: 12px; margin-bottom: 16px; box-shadow: var(--shadow);
}
.filters label { display: flex; flex-direction: column; font-size: 11px; color: var(--muted); text-transform: uppercase; letter-spacing: .04em; }
.filters input, .filters select {
  margin-top: 4px; padding: 7px 9px; border: 1px solid var(--border); border-radius: 8px;
  font-size: 13px; min-width: 140px; background: #fff; color: var(--text);
}

/* ---- Tablas ---- */
.tbl-wrap { background: var(--panel); border: 1px solid var(--border); border-radius: 12px; overflow: hidden; box-shadow: var(--shadow); }
.tbl-head {
  display: flex; justify-content: space-between; align-items: center;
  padding: 12px 14px; border-bottom: 1px solid var(--border);
}
.tbl-head .meta { color: var(--muted); font-size: 13px; }
.tbl-scroll { overflow-x: auto; }
table { border-collapse: collapse; width: 100%; font-size: 13px; }
th, td { padding: 9px 12px; text-align: left; vertical-align: top; }
thead th {
  background: #f9fafc; color: var(--muted); font-weight: 600; font-size: 11px;
  text-transform: uppercase; letter-spacing: .04em; border-bottom: 1px solid var(--border);
  white-space: nowrap;
}
tbody tr { border-top: 1px solid #f0f2f6; }
tbody tr:hover { background: #f9fafc; }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }
td.muted { color: var(--muted); }
.badge {
  display: inline-block; padding: 1px 7px; border-radius: 99px; font-size: 11px;
  font-weight: 600; background: var(--accent-soft); color: var(--accent);
}
.badge.warn { background: #fef3c7; color: var(--warn); }
.badge.bad { background: #fee2e2; color: var(--bad); }
.badge.good { background: #dcfce7; color: var(--good); }
a.badge { text-decoration: none; cursor: pointer; }
a.badge:hover { filter: brightness(0.92); }
.tbl-foot { display: flex; justify-content: space-between; align-items: center; padding: 10px 14px; border-top: 1px solid var(--border); }
.pager { display: flex; gap: 6px; align-items: center; }

.empty {
  padding: 36px 16px; text-align: center; color: var(--muted); font-size: 14px;
}
.empty strong { color: var(--text); display: block; margin-bottom: 4px; font-size: 16px; }

.spin {
  display: inline-block; width: 14px; height: 14px;
  border: 2px solid var(--border); border-top-color: var(--accent);
  border-radius: 50%; animation: spin .8s linear infinite; vertical-align: -2px; margin-right: 6px;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* compact lists in agrupaciones */
.subtable { font-size: 12px; width: 100%; }
.subtable th, .subtable td { padding: 4px 8px; }

/* Cargas / uploads */
.upload-card { display: flex; flex-direction: column; gap: 8px; }
.upload-card p { margin: 0; }
.muted { color: var(--muted); }
.small { font-size: 12px; }
.upload-input { display: inline-block; cursor: pointer; }
.upload-input input[type=file] { display: none; }
.upload-input-fake {
  display: inline-block; padding: 9px 16px; border: 1px solid var(--accent);
  border-radius: 8px; background: var(--accent-soft); color: var(--accent);
  font-size: 14px; font-weight: 600;
}
.upload-input:hover .upload-input-fake { background: var(--accent); color: #fff; }
.upload-pick { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.facturas-list { margin-top: 10px; border-top: 1px solid var(--border); padding-top: 10px; }
.facturas-ul { list-style: none; padding: 0; margin: 0; max-height: 220px; overflow-y: auto;
  font-size: 12px; display: flex; flex-direction: column; gap: 3px; }
.facturas-ul li { padding: 3px 6px; border-radius: 4px; }
.facturas-ul li:hover { background: var(--accent-soft); }
.facturas-name { color: var(--text); font-weight: 500; word-break: break-all; }
.upload-filename { font-size: 12px; color: var(--accent); word-break: break-all; flex: 1; min-width: 0; }
.upload-actions { margin-top: 6px; }
.upload-status { margin-top: 6px; }
.upload-result {
  padding: 12px 14px; border-radius: 8px; font-size: 13px;
  display: flex; flex-direction: column; gap: 6px;
}
.upload-result.ok { background: #dcfce7; color: #14532d; }
.upload-result.warn { background: #fef3c7; color: #78350f; }
.upload-result.error { background: #fee2e2; color: #7f1d1d; }
.upload-result.info { background: var(--accent-soft); color: var(--accent); }
.upload-errors { margin: 4px 0 0 16px; padding: 0; font-size: 12px; }
.upload-stats { display: flex; gap: 14px; font-weight: 600; }

/* ---- Auth: login overlay + user pill ---- */
#auth-overlay {
  position: fixed; inset: 0; display: none; align-items: center; justify-content: center;
  background: rgba(15,23,42,.55); backdrop-filter: blur(4px); z-index: 9999;
}
.login-card {
  background: var(--panel); border: 1px solid var(--border); border-radius: 14px;
  padding: 26px 28px; width: 100%; max-width: 380px; box-shadow: 0 20px 60px rgba(15,23,42,.25);
}
.login-brand { display: flex; gap: 12px; align-items: center; margin-bottom: 22px; }
.login-title { color: var(--text); font-weight: 700; font-size: 18px; }
.login-sub   { color: var(--muted); font-size: 12px; }
.login-form { display: flex; flex-direction: column; gap: 12px; }
.login-form label { display: flex; flex-direction: column; gap: 6px;
  font-size: 12px; color: var(--muted); text-transform: uppercase; letter-spacing: .04em; }
.login-form input {
  padding: 10px 12px; border: 1px solid var(--border); border-radius: 8px;
  font-size: 14px; background: #fff; color: var(--text);
}
.login-form input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
.login-form button { padding: 10px 12px; font-size: 14px; }
.login-error {
  padding: 8px 12px; border-radius: 8px;
  background: #fee2e2; color: #7f1d1d; font-size: 13px;
}

.user-pill {
  display: flex; align-items: center; gap: 8px; padding: 8px 10px;
  background: rgba(255,255,255,.06); border-radius: 8px; margin-bottom: 10px;
}
.user-pill-info { flex: 1; min-width: 0; }
.user-name { color: #fff; font-size: 13px; font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.user-role { color: #94a3b8; font-size: 11px; text-transform: uppercase; letter-spacing: .05em; }
.logout-btn {
  background: transparent; border: 1px solid rgba(255,255,255,.18);
  color: #cbd5e1; padding: 5px 10px; border-radius: 6px; font-size: 12px; cursor: pointer;
}
.logout-btn:hover { background: rgba(255,255,255,.12); color: #fff; }

/* ---- Chat IA facturas ---- */
.ia-chat { display: flex; flex-direction: column; gap: 12px; }
.ia-form { display: flex; gap: 8px; align-items: flex-start; }
.ia-form textarea {
  flex: 1; min-height: 64px; resize: vertical;
  padding: 10px 12px; border: 1px solid var(--border); border-radius: 8px;
  font: inherit; font-size: 14px; background: #fff; color: var(--text);
}
.ia-form textarea:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
.ia-msg { padding: 12px 14px; border-radius: 10px; font-size: 14px; line-height: 1.45; white-space: pre-wrap; }
.ia-msg.q { background: var(--accent-soft); color: #1e3a8a; }
.ia-msg.a { background: #f1f5f9; color: var(--text); border: 1px solid var(--border); }
.ia-msg .meta { color: var(--muted); font-size: 11px; margin-bottom: 4px;
  text-transform: uppercase; letter-spacing: .04em; }
.ia-history { display: flex; flex-direction: column; gap: 14px; }
.ia-pair { display: flex; flex-direction: column; gap: 6px; }

/* ---- Modal genérico ---- */
.modal-backdrop {
  position: fixed; inset: 0; background: rgba(15,23,42,.55);
  display: flex; align-items: center; justify-content: center;
  z-index: 1000; padding: 20px;
}
.modal-dialog {
  background: var(--panel); border-radius: 12px;
  box-shadow: 0 10px 40px rgba(15,23,42,.25);
  display: flex; flex-direction: column;
  max-height: 90vh; width: 100%;
}
.modal-sm { max-width: 420px; }
.modal-md { max-width: 720px; }
.modal-lg { max-width: 960px; }
.modal-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 18px; border-bottom: 1px solid var(--border);
}
.modal-header h3 { margin: 0; font-size: 15px; color: var(--text); }
.modal-close {
  background: none; border: none; font-size: 18px; color: var(--muted);
  cursor: pointer; line-height: 1; padding: 4px 8px; border-radius: 6px;
}
.modal-close:hover { background: #f1f5f9; color: var(--text); }
.modal-body { padding: 16px 18px; overflow: auto; }

/* ---- Tabla historial ---- */
.hist-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.hist-table th, .hist-table td {
  text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--border);
  vertical-align: top;
}
.hist-table th { color: var(--muted); font-weight: 600;
  text-transform: uppercase; letter-spacing: .03em; font-size: 11px; }
.hist-table tr:last-child td { border-bottom: none; }
.hist-table td.num { text-align: right; font-variant-numeric: tabular-nums; }
.hist-empty { color: var(--muted); padding: 24px; text-align: center; }
.hist-pager {
  display: flex; align-items: center; justify-content: space-between;
  gap: 10px; margin-top: 12px; padding-top: 10px; border-top: 1px solid var(--border);
  font-size: 13px; color: var(--muted);
}
.hist-pager .pager-btns { display: flex; gap: 6px; }
.hist-pager button {
  padding: 4px 10px; border: 1px solid var(--border); background: #fff;
  border-radius: 6px; cursor: pointer; font: inherit; font-size: 13px;
}
.hist-pager button:disabled { opacity: .4; cursor: default; }
.hist-pager button:not(:disabled):hover { background: #f1f5f9; }
.hist-badge { display: inline-block; padding: 2px 8px; border-radius: 999px;
  font-size: 11px; font-weight: 600; }
.hist-badge.ok { background: #dcfce7; color: var(--good); }
.hist-badge.warn { background: #fef3c7; color: var(--warn); }
.hist-badge.bad { background: #fee2e2; color: var(--bad); }

/* Botón secundario "Ver ficheros cargados" */
.upload-actions .ghost {
  background: #fff; color: var(--accent); border: 1px solid var(--accent);
}
.upload-actions .ghost:hover { background: var(--accent-soft); }
.upload-actions { display: flex; gap: 8px; flex-wrap: wrap; }