:root {
  --bg: #f4f5f7;
  --panel: #ffffff;
  --border: #e2e5ea;
  --text: #1f2430;
  --text-muted: #6b7280;
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --success: #16a34a;
  --danger: #dc2626;
  --warn: #d97706;
  --radius: 10px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
}

.app { min-height: 100vh; display: flex; flex-direction: column; }

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 24px;
  background: #111827;
  color: white;
  flex-wrap: wrap;
  gap: 10px;
}

.brand { font-size: 18px; font-weight: 700; }
.brand-sub { font-weight: 400; color: #9ca3af; font-size: 13px; }

.tabs { display: flex; gap: 4px; flex-wrap: wrap; }

.tab-btn {
  background: transparent;
  color: #d1d5db;
  border: none;
  padding: 8px 14px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 13.5px;
  font-weight: 500;
}
.tab-btn:hover { background: #1f2937; color: white; }
.tab-btn.active { background: var(--primary); color: white; }

main { flex: 1; padding: 20px 24px 60px; max-width: 1400px; width: 100%; margin: 0 auto; }

h1 { font-size: 20px; margin: 0 0 4px; }
h2 { font-size: 16px; margin: 0 0 10px; }
.subtitle { color: var(--text-muted); margin: 0 0 18px; font-size: 13px; }

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  margin-bottom: 16px;
}

.grid { display: grid; gap: 14px; }
.grid-cards { grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); }
.grid-2 { grid-template-columns: 1fr 1fr; }

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px;
}
.card .label { color: var(--text-muted); font-size: 12.5px; margin-bottom: 6px; }
.card .value { font-size: 22px; font-weight: 700; }
.card .sub { font-size: 12px; color: var(--text-muted); margin-top: 4px; }

table { width: 100%; border-collapse: collapse; font-size: 13px; }
thead th {
  text-align: left;
  color: var(--text-muted);
  font-weight: 600;
  border-bottom: 1px solid var(--border);
  padding: 8px 8px;
  white-space: nowrap;
}
tbody td { padding: 7px 8px; border-bottom: 1px solid #f0f1f4; vertical-align: middle; }
tbody tr:hover { background: #fafbfc; }
.table-wrap { overflow-x: auto; }

.pill {
  display: inline-block;
  padding: 2px 9px;
  border-radius: 999px;
  font-size: 11.5px;
  font-weight: 600;
  background: #eef2ff;
  color: #4338ca;
}
.pill.low { background: #fef2f2; color: var(--danger); }
.pill.ok { background: #f0fdf4; color: var(--success); }
.pill.entrada { background: #f0fdf4; color: var(--success); }
.pill.salida { background: #fef2f2; color: var(--danger); }
.pill.pendiente { background: #fffbeb; color: var(--warn); }
.pill.aprobado { background: #f0fdf4; color: var(--success); }
.pill.rechazado { background: #fef2f2; color: var(--danger); }
.pill.media { background: #fffbeb; color: var(--warn); }

button, .btn {
  cursor: pointer;
  border: 1px solid var(--border);
  background: white;
  padding: 8px 14px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
}
button:hover { background: #f4f5f7; }
.btn-primary { background: var(--primary); color: white; border-color: var(--primary); }
.btn-primary:hover { background: var(--primary-dark); }
.btn-danger { background: #fff5f5; color: var(--danger); border-color: #fecaca; }
.btn-sm { padding: 5px 10px; font-size: 12px; }

.toolbar { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; margin-bottom: 14px; }
.toolbar input, .toolbar select { padding: 7px 10px; border: 1px solid var(--border); border-radius: 8px; font-size: 13px; }
.toolbar .spacer { flex: 1; }

.form-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px,1fr)); gap: 12px; }
label { display: block; font-size: 12.5px; color: var(--text-muted); margin-bottom: 4px; font-weight: 600; }
input, select, textarea {
  width: 100%;
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 13px;
  font-family: inherit;
}
textarea { resize: vertical; }

.subtabs { display: flex; gap: 6px; margin-bottom: 16px; }
.subtab-btn {
  padding: 7px 14px; border-radius: 8px; border: 1px solid var(--border); background: white; font-weight: 600; font-size: 13px;
}
.subtab-btn.active { background: var(--text); color: white; border-color: var(--text); }

.dropzone {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 34px 20px;
  text-align: center;
  color: var(--text-muted);
  background: #fafbfc;
  cursor: pointer;
}
.dropzone.drag { border-color: var(--primary); background: #eff6ff; color: var(--primary); }

.toast-container { position: fixed; bottom: 18px; right: 18px; display: flex; flex-direction: column; gap: 8px; z-index: 999; }
.toast {
  background: #111827; color: white; padding: 10px 16px; border-radius: 8px; font-size: 13px;
  box-shadow: 0 4px 14px rgba(0,0,0,.2); max-width: 340px;
}
.toast.error { background: #7f1d1d; }
.toast.success { background: #14532d; }

.modal-backdrop {
  position: fixed; inset: 0; background: rgba(15,17,23,.5);
  display: flex; align-items: flex-start; justify-content: center; padding: 40px 16px;
  z-index: 998; overflow-y: auto;
}
.modal {
  background: white; border-radius: 12px; padding: 20px; width: 100%; max-width: 640px;
  box-shadow: 0 10px 40px rgba(0,0,0,.25);
}
.modal.wide { max-width: 980px; }
.modal-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 14px; }
.modal-header h2 { margin: 0; }
.modal-close { border: none; background: none; font-size: 20px; cursor: pointer; color: var(--text-muted); }
.modal-actions { display: flex; justify-content: flex-end; gap: 8px; margin-top: 16px; }

.muted { color: var(--text-muted); }
.right { text-align: right; }
.mt-8 { margin-top: 8px; } .mt-16 { margin-top: 16px; }
.small { font-size: 12px; }
.empty-state { text-align: center; padding: 40px 20px; color: var(--text-muted); }

.badge-confianza-alta { color: var(--success); font-weight: 700; }
.badge-confianza-media { color: var(--warn); font-weight: 700; }
.badge-confianza-nula { color: var(--danger); font-weight: 700; }

/* Gráfica de diferencias del levantamiento de inventario (Ajuste de stock):
   barras divergentes en CSS puro, sin librería externa -- verde a la
   derecha del centro para diferencias positivas (sobrante), rojo a la
   izquierda para negativas (faltante). */
.chart-diverg { display: flex; flex-direction: column; gap: 6px; margin: 10px 0; }
.chart-row { display: grid; grid-template-columns: 150px 1fr 64px; align-items: center; gap: 8px; }
.chart-label { font-size: 12px; color: var(--text-muted); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.chart-track { position: relative; height: 14px; background: #f3f4f6; border-radius: 3px; }
.chart-mid { position: absolute; left: 50%; top: 0; bottom: 0; width: 1px; background: #d1d5db; }
.chart-fill { position: absolute; top: 1px; bottom: 1px; border-radius: 2px; }
.chart-fill.pos { background: var(--success); }
.chart-fill.neg { background: var(--danger); }
.chart-value { font-size: 12px; text-align: right; font-variant-numeric: tabular-nums; }
.chart-value.pos { color: var(--success); }
.chart-value.neg { color: var(--danger); }

@media (max-width: 720px) {
  .grid-2 { grid-template-columns: 1fr; }
  main { padding: 14px; }
}

/* ---------------------------------------------------------------------
   Login (versión en la nube)
   --------------------------------------------------------------------- */
.login-screen {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
  padding: 16px;
}
.login-box {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 26px;
  width: 100%;
  max-width: 360px;
  box-shadow: 0 10px 40px rgba(0,0,0,.08);
}
.login-error {
  margin-top: 12px;
  padding: 8px 10px;
  border-radius: 8px;
  background: #fef2f2;
  color: var(--danger);
  font-size: 12.5px;
}
.login-exito {
  margin-bottom: 16px;
  padding: 10px 12px;
  border-radius: 8px;
  background: #f0fdf4;
  color: var(--success);
  font-size: 13px;
  font-weight: 600;
}

/* ---------------------------------------------------------------------
   Usuario conectado (barra superior)
   --------------------------------------------------------------------- */
.user-box { display: flex; align-items: center; gap: 10px; }
.user-info { display: flex; flex-direction: column; align-items: flex-end; line-height: 1.3; }
.user-nombre { font-size: 12.5px; font-weight: 600; color: white; }
.user-rol { font-size: 11px; color: #9ca3af; }