#miner-calculator-api {
  max-width: 600px;
  margin: 20px auto;
  padding: 20px;
  background: #fff;
  border-radius: 12px;
  box-shadow: 0 2px 10px rgba(0,0,0,0.1);
  font-family: tahoma, sans-serif;
}
#miner-calculator-api label {
  margin-top: 10px;
  display: block;
  font-size: 14px;
}
#miner-calculator-api input,
#miner-calculator-api select {
  width: 100%;
  margin-top: 5px;
  padding: 8px;
  border: 1px solid #ccc;
  border-radius: 8px;
}
#miner-calculator-api button {
  margin-top: 15px;
  padding: 10px;
  width: 100%;
  background: #2563eb;
  color: white;
  border: none;
  border-radius: 8px;
  cursor: pointer;
}
#miner-calculator-api button:hover {
  background: #1e40af;
}
#miner-calculator-api .result {
  margin-top: 15px;
  padding: 12px;
  border: 1px solid #eee;
  border-radius: 8px;
  background: #f9fafb;
}