html, body {
    height: 100%;
  }
  
  body {
    margin: 0;
    display: flex;
    flex-flow: column;
    align-items: center;
    justify-content: center;
    background: #464646;
    font: 16px -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    gap: 1rem;
  }
  
  h1 {
    color: #fff;
    font-size: 4rem;
    font-weight: 300;
    margin: 0;
  }
  
  h2 {
    color: #fff;
    font-size: 1.1rem;
    font-weight: 300;
    margin: 0;
  }
  
  input {
    outline: 0;
    border: none;
    border-bottom: 1px solid #fff;
    border-radius: 0;
    background: transparent;
    width: 220px;
    padding: 0;
    color: #fff;
    -webkit-text-fill-color: #fff;
    opacity: 1;
  }
  
  #signupArea {
    display: flex;
    flex-direction: column;
  }
  
  #signupArea > *{
    margin-top: 15px;
  }
  
  #signupArea > div {
    display: flex;
    justify-content: space-between;
  }
  
  #datePicker {
    display: flex;
    gap: 1rem;
    width: 75vw;
    max-width: 400px;
    position: absolute;
    z-index: 99;
  
    background-color: black;
    border-radius: 60px 0px 60px 60px;
  
    clip-path: circle(0% at 100% 0%);
    transition: clip-path 0.7s;
  
    cursor: grab;
  }
  
  svg {
    width: 100%;
  }
  
  button {
    
    border: none;
    background: #fff;
    color: #464646;
    border-radius: 0.3rem;
    padding: 0.5rem;
    cursor: pointer;
    position: relative;
  }
  
  #date {
    width: 50%;
    max-width: 50%;
  }
  
  #date input{
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    margin:0;
    border: none;
    cursor: pointer;
    appearance: none;
    -webkit-appearance: none;
  }
  
  .future{
    color: red;
    font-size: 0.6rem;
  }
  
  #date input:checked ~ #datePicker{
    clip-path: circle(150% at 100% 100%);
  }
  
  input, button {
    font: inherit;
  }