body {
  font-family: Arial, sans-serif;
  margin: 0;
  background: #f5f5f5;
}

nav {
  background: #222;
  color: white;
  padding: 10px 20px;
  display: flex;
  justify-content: space-between;
}

button {
  padding: 8px 12px;
  margin: 5px 0;
  font-size: 14px;
  cursor: pointer;
}

.container {
  padding: 20px;
}

#resultsTable {
  width: 100%;
  margin-top: 20px;
  border-collapse: collapse;
}

#resultsTable th, #resultsTable td {
  border: 1px solid #ccc;
  padding: 6px;
}

.hidden {
  display: none;
}

.loading {
  padding: 40px;
  font-size: 20px;
  text-align: center;
}