body {
  font-family: Arial, sans-serif;
  margin: 20px;
  background: #f4f4f0;
}

.panel {
  background: white;
  border: 1px solid #ccc;
  border-radius: 6px;
  padding: 10px 15px;
  margin-bottom: 15px;
}

button {
  padding: 6px 14px;
  margin-right: 6px;
  cursor: pointer;
}

.hand {
  margin-bottom: 12px;
}

.card {
  display: inline-block;
  width: 38px;
  margin: 2px;
  padding: 6px 0;
  text-align: center;
  border: 1px solid #555;
  border-radius: 4px;
  background: #fff;
  font-weight: bold;
}

.red {
  color: #c62828;
}

.black {
  color: #111;
}

.powerItem {
  display: inline-block;
  margin: 3px 8px 3px 0;
}

.powerItem input {
  width: 55px;
}