main {
  max-width: 520px;
  margin: 0 auto;
}
summary {
  font-size: 1.25rem;
  font-weight: 600;
  background-color: #fafafa;
  background-image: radial-gradient(circle at 40% 91%, rgba(251, 251, 251,0.04) 0%, rgba(251, 251, 251,0.04) 50%,rgba(229, 229, 229,0.04) 50%, rgba(229, 229, 229,0.04) 100%),radial-gradient(circle at 66% 97%, rgba(36, 36, 36,0.04) 0%, rgba(36, 36, 36,0.04) 50%,rgba(46, 46, 46,0.04) 50%, rgba(46, 46, 46,0.04) 100%),radial-gradient(circle at 86% 7%, rgba(40, 40, 40,0.04) 0%, rgba(40, 40, 40,0.04) 50%,rgba(200, 200, 200,0.04) 50%, rgba(200, 200, 200,0.04) 100%),radial-gradient(circle at 15% 16%, rgba(99, 99, 99,0.04) 0%, rgba(99, 99, 99,0.04) 50%,rgba(45, 45, 45,0.04) 50%, rgba(45, 45, 45,0.04) 100%),radial-gradient(circle at 75% 99%, rgba(243, 243, 243,0.04) 0%, rgba(243, 243, 243,0.04) 50%,rgba(37, 37, 37,0.04) 50%, rgba(37, 37, 37,0.04) 100%),linear-gradient(90deg, rgb(34, 222, 237),rgb(135, 89, 215));
  color: #fff;
  padding: 1rem;
  margin-bottom: 1rem;
  outline: none;
  border-radius: 0.25rem;
  text-align: left;
  cursor: pointer;
  position: relative;
}
p { text-align: left; }
details[open] summary ~ * {
  animation: sweep .5s ease-in-out;
}
@keyframes sweep {
  0%    {opacity: 0; margin-top: -10px}
  100%  {opacity: 1; margin-top: 0px}
}
details > summary::after {
  position: absolute;
  content: "+";
  right: 20px;
}
details[open] > summary::after {
  position: absolute;
  content: "-";
  right: 20px;
}
details > summary::-webkit-details-marker {
  display: none;
}