* {
  padding: 0;
  margin: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
  background-color: rgb(34, 32, 34);
  padding: 70px 150px 70px 150px;
  color: rgb(190, 190, 190);
}

header h1 {
  width: 100%;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 10px;
  color: chartreuse;
  text-align: center;
  margin-bottom: 20px;
}

form {
  width: 100%;
  display: flex;
  flex-direction: row;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 30px;
}

.form-group {
  width: calc(100% / 2 - 20px);
  display: flex;
  flex-direction: column;
}

label {
  font-size: 1.1rem;
  margin-bottom: 10px;
}

input {
  border: none;
  background-color: transparent;
  border-bottom: 2px solid chartreuse;
  color: white;
  font-size: 1.2rem;
  font-weight: bold;
  letter-spacing: 2px;
  padding: 20px;
  outline: none;
}

input:focus {
  border-bottom: 5px solid chartreuse;
}

#calc {
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
  justify-content: space-between;
}

.calc-group {
  width: calc(100% / 3 - 40px);
}

h4 {
  width: 100%;
  font-weight: normal;
}

p {
  width: 100%;
  padding: 20px;
  border-bottom: 1px solid rebeccapurple;
  margin-bottom: 20px;
  color: rgb(190, 190, 190);
  font-size: 1.1rem;
  letter-spacing: 1px;
  font-weight: bolder;
  white-space: pre-wrap;
}