body {
  background-image: url(https://static.vecteezy.com/system/resources/previews/008/426/215/non_2x/beautiful-meteor-shower-in-the-dark-sky-background-free-vector.jpg);
  background-size: cover;
  background-repeat: no-repeat;
  background-position: center center;
  height: 100vh;
}


.button {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-color: rgb(20, 20, 20);
    border: none;
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0px 0px 0px 4px rgba(180, 160, 255, 0.253);
    cursor: pointer;
    transition-duration: 0.3s;
    overflow: hidden;
    position: absolute;
    top: 85%;
    left: 91%;
  }
  
  .svgIcon {
    width: 12px;
    transition-duration: 0.3s;
  }
  
  .svgIcon path {
    fill: white;
  }
  
  .button:hover {
    width: 140px;
    border-radius: 50px;
    transition-duration: 0.3s;
    background-color: rgb(53, 71, 64);
    align-items: center;
  }
  
  .button:hover .svgIcon {
    transition-duration: 0.3s;
    transform: translateY(-200%);
  }
  
  .button::before {
    position: absolute;
    bottom: -20px;
    content: "Back to home page";
    color: white;
    font-size: 0px;
  }
  
  .button:hover::before {
    font-size: 13px;
    opacity: 1;
    bottom: unset;
    transition-duration: 0.3s;
  }
  
  .form-control {
    position: absolute;
    top: 55%;
    left: 42%;
    margin: 20px 0 40px;
    width: 15%;
  }
  
  .form-control input {
    background-color: transparent;
    border: 0;
    border-bottom: 2px #fff solid;
    display: block;
    width: 100%;
    padding: 15px 0;
    font-size: 25px;
    color: #fff;
  }
  
  .form-control input:focus,
  .form-control input:valid {
    outline: 0;
    border-bottom-color: lightblue;
  }
  
  .form-control label {
    position: absolute;
    top: 1px;
    left: 0;
    pointer-events: none;
  }
  
  .form-control label span {
    display: inline-block;
    font-size: 40px;
    min-width: 5px;
    color: #fff;
    transition: 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);
  }
  
  .form-control input:focus + label span,
  .form-control input:valid + label span {
    color: lightblue;
    transform: translateY(-30px);
  }

.prompt, .output, .total_output {
    color: #fff;
    text-align: center;
    font-size: 24px;
    margin: 20px;
}

.prompt {
    position: absolute;
    top: 30%;
    left: 50%;
    transform: translate(-50%, -50%);
    user-select: none;
    font-size: 500%;
    color: rgba(252, 144, 144, 0.748);
}

.output {
    position: absolute;
    top: 70%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.total_output {
    position: absolute;
    top: 75%;
    left: 50%;
    transform: translate(-50%, -50%);
}