html,
body {
  height: 100%;
}

body {
  margin: 0;
  display: grid;
  place-items: center;
  font-family: Poppins;
  background: #37353b;
}

button {
  font-family: inherit;
  cursor: pointer;
  background: #1a1a1a;
  color: #f9f9f9;
  border: 0;
  border-radius: 8px;
  padding: 20px 36px;
  font-size: 16px;
}

@keyframes background-in {
  0% {
    scale: 0 0.005;
  }
  33% {
    scale: 1 0.005;
  }
  66%,
  100% {
    scale: 1 1;
  }
}

.modal-background {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: grid;
  place-items: center;
  opacity: 0;
  visibility: hidden;
  transform: scale(1, 1);
  background: rgba(0, 0, 0, 0.5);
  transition: 0.5s;
}

body.open .modal-background {
  visibility: visible;
  opacity: 1;
  animation: background-in 1s both;
}

@keyframes modal-in {
  0%,
  66% {
    opacity: 0;
    visibility: hidden;
    translate: -50% -30%;
  }
  100% {
    opacity: 1;
    visibility: visible;
  }
}

.modal {
  position: fixed;
  top: 50%;
  left: 50%;
  background: #37353b;
  color: #f9f9f9;
  padding: 48px 40px;
  width: 300px;
  border-radius: 12px;
  translate: -50% -50%;
  opacity: 0;
  visibility: hidden;
  transition: 0.3s;
}

body.open .modal {
  opacity: 1;
  visibility: visible;
  animation: modal-in 1s;
}

body.closed .modal {
  opacity: 0;
  visibility: hidden;
  translate: -50% -50%;
}

h2 {
  margin: 0 0 8px;
  font-weight: 400;
  font-size: 21px;
}

p {
  margin: 0;
  color: rgba(255, 255, 255, 0.5);
}