body {
  background-color: #f2f2f2;
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  overflow-y: scroll;
}

.container {
  max-width: 400px;
  margin: 50px auto;
  padding: 20px;
  background-color: #fff;
  border-radius: 5px;
  box-shadow: 0 2px 5px #0000001a;
  text-align: center;
}

h1 {
  color: #333;
}

h1 a {
  text-decoration: none;
  color: crimson;
  position: relative;
  transition: color 0.3s ease;
}

h1 a::before {
  content: "";
  position: absolute;
  width: 100%;
  height: 2px;
  background-color: #ff1140;
  bottom: -2px;
  transform: scaleX(0);
  transition: transform 0.3s ease;
}

h1 a:hover::before {
  transform: scaleX(1);
}

.input-container {
  margin-bottom: 10px;
  text-align: left;
}

label {
  margin: 2px;
  font-weight: bold;
}

small {
  margin-left: 3px;
  font-size: 13px;
  color: #888;
  display: block;
  margin-top: 3px;
}

.earningsInput[type="text"] {
  width: 100%;
  padding: 10px;
  border: 1px solid #ccc;
  border-radius: 5px;
  box-sizing: border-box;
  margin-top: 10px;
  font-size: 15px;
  outline-color: orange;
}

.ratesInput[type="number"] {
  width: 100%;
  padding: 10px;
  border: 1px solid #ccc;
  border-radius: 5px;
  box-sizing: border-box;
  margin-top: 10px;
  font-size: 15px;
  outline-color: orange;
}

.earningsInput,
.ratesInput {
  border-color: orange;
}

/* Remove Arrows/Spinners for Chrome, Safari, Edge, Opera */
input::-webkit-outer-spin-button,
input::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

input[type="text"] {
  font-size: 15px;
  width: 100%;
  padding: 5px;
  margin-top: 5px;
  border: none;
  background-color: white;
}

button {
  background-color: #4caf50;
  color: #fff;
  border: none;
  padding: 10px 20px;
  border-radius: 5px;
  cursor: pointer;
  margin-top: 20px;
  font-size: 14px;
  font-weight: bold;
  transition: background-color 0.2s ease;
}

button:hover {
  background-color: #49ca4d;
}

button[onclick="clearFields()"] {
  background-color: crimson;
}

button[onclick="clearFields()"]:hover {
  background-color: #ff1140;
}

#result {
  margin: 15px 0 15px 0;
  font-weight: bold;
  font-size: 20px;
}

.total-earnings {
  color: #4caf50;
  font-weight: bold;
  font-size: 30px;
  margin: 15px auto;
}

.isNan {
  color: #ff1140;
  font-size: 18px;
}

/* Responsive web design */
@media only screen and (max-width: 390px) {
  .container {
    max-width: 280px;
  }

  h1 {
    font-size: 23px;
  }

  label {
    font-size: 13px;
  }

  .earningsInput,
  .ratesInput {
    font-size: 13px;
    padding: 7px;
  }

  input[type="text"] {
    font-size: 13px;
  }

  button {
    font-size: 12px;
    font-weight: bold;
  }

  #result {
    font-size: 17px;
  }

  .total-earnings {
    font-size: 23px;
  }

  .isNan {
    font-size: 15px;
  }
}