* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, sans-serif;
  background: #f4f5f7;
  color: #1c1e21;
}
.barra {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.75rem 1rem;
  background: #1c1e21;
  color: #fff;
}
.barra .marca { font-weight: 600; }
.barra .usuario { margin-left: auto; opacity: 0.8; font-size: 0.9rem; }
.barra a { color: #fff; }

main { max-width: 720px; margin: 0 auto; padding: 1.5rem 1rem; }

.caja-login {
  max-width: 320px;
  margin: 3rem auto;
  background: #fff;
  padding: 1.5rem;
  border-radius: 8px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.1);
}
.caja-login form { display: flex; flex-direction: column; gap: 0.75rem; }
.caja-login label { display: flex; flex-direction: column; gap: 0.25rem; font-size: 0.9rem; }
.caja-login input { padding: 0.5rem; border: 1px solid #ccc; border-radius: 4px; }
.caja-login button, .buscador button {
  padding: 0.6rem;
  background: #1c1e21;
  color: #fff;
  border: none;
  border-radius: 4px;
  cursor: pointer;
}
.error { color: #c0392b; }

.buscador { display: flex; gap: 0.5rem; margin-bottom: 1rem; flex-wrap: wrap; }
.buscador input {
  flex: 1;
  min-width: 160px;
  padding: 0.6rem;
  border: 1px solid #ccc;
  border-radius: 4px;
}
.buscador select {
  padding: 0.6rem;
  border: 1px solid #ccc;
  border-radius: 4px;
  background: #fff;
}
.categoria { color: #666; font-size: 0.9rem; }

.conteo { color: #666; font-size: 0.9rem; margin: 0 0 0.5rem; }

.tabla-stock {
  width: 100%;
  border-collapse: collapse;
  background: #fff;
  border-radius: 8px;
  overflow: hidden;
}
.tabla-stock th, .tabla-stock td {
  padding: 0.6rem 0.75rem;
  text-align: left;
  border-bottom: 1px solid #eee;
}
.tabla-stock .cantidad { text-align: right; font-variant-numeric: tabular-nums; }
.tabla-stock .vacio { text-align: center; color: #888; }

.form-inline { margin: 0; }
.boton-secundario {
  padding: 0.4rem 0.7rem;
  background: #fff;
  color: #1c1e21;
  border: 1px solid #ccc;
  border-radius: 4px;
  cursor: pointer;
  font-size: 0.85rem;
}
.boton-secundario:disabled { opacity: 0.4; cursor: not-allowed; }

.form-usuario {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  background: #fff;
  padding: 1rem;
  border-radius: 8px;
  align-items: flex-end;
}
.form-usuario label { display: flex; flex-direction: column; gap: 0.25rem; font-size: 0.9rem; }
.form-usuario input, .form-usuario select {
  padding: 0.5rem;
  border: 1px solid #ccc;
  border-radius: 4px;
}
.form-usuario button {
  padding: 0.6rem 1rem;
  background: #1c1e21;
  color: #fff;
  border: none;
  border-radius: 4px;
  cursor: pointer;
}