app/static/style.css

body {
  font-family: Arial, sans-serif;
}
#results table {
  border-collapse: collapse;
  width: 100%;
}
#results th,
#results td {
  border: 1px solid #ddd;
  padding: 8px;
  text-align: left;
}
#results th {
  background-color: #f2f2f2;
}