:root, html {
  --color-bg: #ffffff;
  --color-text: #000000;
  --width-main: 600px;
  --padding-main: 30px;
  --ol-item-bg: #da2f47;
  --ol-item-size: 24px;
}
@media (prefers-color-scheme: dark) {
  :root, html {
    --color-bg: #000000;
    --color-text: #ffffff;
  }	
}
@media (max-width: 600px) {
  :root, html {
    --padding-main: 15px;
  }
}
html, body {
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: 'Helvetica Neue', 'Arial Nova', Helvetica, Arial, sans-serif;
}
main {
  max-width: var(--width-main);
  margin: 0 auto;
  padding: var(--padding-main);
}
h1 {
  margin-top: 0;
  font-size: 2rem;
}
ol {
  list-style: none;
  counter-reset: item;
  font-size: 1.2rem;
  margin-left: 0;
  padding-left: 0;
}
ol > li {
  counter-increment: item;
  margin-bottom: 1rem;
  position: relative;
  padding-left: calc(var(--ol-item-size) + 12px);
}
ol > li:before {
  content: counter(item);
  background: var(--ol-item-bg);
  border-radius: 100%;
  color: white;
  width: var(--ol-item-size);
  height: var(--ol-item-size);
  line-height: var(--ol-item-size);
  font-size: 14px;
  text-align: center;
  display: inline-block;
  position: absolute;
  top: -2px;
  left: 0;
}