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;
}