style.css

@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@400;500;600;700&display=swap');
*{
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Poppins', sans-serif;
}
body{
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 0 10px;
  background: #A05A8E;
}
.wrapper{
    width: 370px;
    padding: 30px;
    border-radius: 7px;
    background: #fff;
    box-shadow: 7px 7px 20px rgba(0, 0, 0, 0.05);
  }
  .wrapper .header{
    font-size: 28px;
    font-weight: 500;
    text-align: center;
  }
  .wrapper form{
    margin: 40px 0 20px 0;
  }
  form :where(input, select, button){
    width: 100%;
    outline: none;
    border-radius: 5px;
    border: none;
  }
  form p{
    font-size: 18px;
    margin-bottom: 5px;
  }
  #heightInput{
      margin-top: 20px;
  }
  form input{
    height: 50px;
    font-size: 17px;
    margin-top: 20px;
    padding: 0 15px;
    border: 1px solid #999;
  }
  form input:focus{
    padding: 0 14px;
    border: 2px solid #A05A8E;
  }
  form button{
    height: 52px;
    margin-top: 20px;
    color: #fff;
    font-size: 17px;
    cursor: pointer;
    background: #A05A8E;
    transition: 0.3s ease;
  }
  form button:hover{
    background: #A05A8E;
  }
  #results{
      text-align: center;
  }