body {
  font-family: Arial, sans-serif;
  padding: 20px;
  background-color: #f9f9f9;
}
h1 {
  text-align: center;
}
.controls {
  margin: 20px 0;
  text-align: center;
}
.controls input, .controls button {
  padding: 10px;
  margin: 5px;
}
table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 20px;
}
th, td {
  border: 1px solid #999;
  padding: 10px;
  text-align: center;
}
@media print {
  .controls {
    display: none;
  }
}
#summaryTable {
  width: 100%;
  border-collapse: collapse;
}
#summaryTable th, #summaryTable td {
  border: 1px solid #666;
  padding: 8px;
  text-align: center;
}