body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

.container-lab {
  max-width: 800px;
  margin: 0 auto;
  padding: 20px;
}

.lab-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 20px;
}

.lab-table th,
.lab-table td {
  border: 1px solid #ddd;
  padding: 8px;
  text-align: left;
}

.lab-table th {
  background-color: #f2f2f2;
}