body, html {
  height: 100%;
  margin: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: #f0f0f0;
}

.test-container {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.test-table {
  width: 50%;
  margin: 0 auto;
  border-collapse: collapse;
  text-align: center;
  background-color: #fff;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

.test-table th, .test-table td {
  padding: 10px;
  border: 1px solid #ccc;
}

.test-table caption {
  caption-side: top;
  font-size: 1.5em;
  margin-bottom: 10px;
}