Разработка Оформление списка CSS

html {
  background: #eee;
}

body {
  filter: drop-shadow(0 1em 1em rgba(0, 0, 0, 0.2));
}

p {
  box-sizing: border-box;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: relative;
  margin: 1.25em auto;
  border: solid 0.5em transparent;
  padding: 0.25em;
  width: 26em;
  height: 5em;
  border-radius: 2.5em;
  background: Linear-gradient(#dbdbdb, #fff) content-box, Linear-gradient(var(--slist)) padding-box, Linear-gradient(#fff, #dcdcdc) border-box;
  font: 1.5em/ 1.375 trebuchet ms, verdana, sans-serif;
  text-align: center;
  text-indent: 1em;
  -webkit-clip-path: inset(0 round 2.5em);
  clip-path: inset(0 round 2.5em);
  counter-increment: c;
}
p:before {
  position: absolute;
  right: -0.5em;
  width: 5em;
  height: 5em;
  border-radius: 0.5em;
  transform: rotate(45deg);
  box-shadow: 0 0 7px rgba(0, 0, 0, 0.2);
  background: Linear-gradient(-45deg, #e4e4e4 calc(50% - 2.5em), #fff calc(50% + 2.5em));
  content: "";
}
p:after {
  box-sizing: inherit;
  display: grid;
  place-content: center;
  position: relative;
  border: inherit;
  margin-right: -0.25em;
  width: 4em;
  height: 4em;
  border-radius: 50%;
  box-shadow: inset 0 0 1px 1px #efefef, inset 0 -0.5em rgba(0, 0, 0, 0.1);
  background: Linear-gradient(var(--slist)) padding-box, Linear-gradient(#d0d0d0, #e7e7e7) border-box;
  color: #fff;
  text-indent: 0;
  content: counter(c,decimal-leading-zero);
}