.calculator {
  background: #333;
  padding: 30px;
  border-radius: 15px;
  width: 100%;
  max-width: 500px;
  box-shadow: 0 0 15px rgba(0, 0, 0, 0.5);
  margin: 0 auto;
  color: #f1f1f1;
  font-family: "Poppins", sans-serif;
}

h2 {
  text-align: center;
  color: #3af5c0;
  margin-bottom: 20px;
}

label {
  display: block;
  margin: 15px 0 5px;
}

input,
select {
  width: 100%;
  padding: 10px;
  border-radius: 8px;
  border: none;
  outline: none;
  margin-bottom: 10px;
}

button {
  width: 48%;
  padding: 12px;
  margin-top: 10px;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  font-weight: bold;
}

.calculate {
  background-color: #00e676;
  color: #111;
}

.reset {
  background-color: #ff5252;
  color: #fff;
  float: right;
}

.result {
  display: none;
  background: #1e1e1e;
  padding: 20px;
  border-radius: 10px;
  margin-top: 20px;
}

.result h3 {
  color: #00e676;
  margin-bottom: 10px;
}

.result p {
  margin: 5px 0;
  font-size: 15px;
}

#chargingType {
  background-color: #000;
  color: #fff;
  padding: 10px;
  border-radius: 8px;
  border: none;
  width: 100%;
  appearance: none;
}

#chargingType option {
  background-color: #000;
  color: #fff;
}