body {
  font-family: Segoe UI, Tahoma, Arial, sans-serif;
  background: #0b5a2a;
  color: white;
  text-align: center;
}

header, footer {
  background: #004b23;
  padding: 10px;
}

button {
  font-size: 16px;
  padding: 6px 14px;
  margin: 4px;
}

.slotTable {
  margin: 20px auto;
  border-collapse: collapse;
}

.slotTable td {
  width: 140px;
  height: 140px;
  border: 2px solid #ffffff;
  font-size: 32px;
  background: #0f7a3a;
}

dialog {
  background: #f0f0f0;
  color: black;
  padding: 20px;
  border: 2px solid black;
}