.list-tree {
  --tree-clr: #075985;
  --tree-font-size: 1rem;
  --tree-item-height: 2;
  --tree-offset: 1.5rem;
  --tree-thickness: 2px;
  --tree-style: solid;
}
.list-tree ul{
  display: grid;
  list-style: none;
  font-size: var(--tree-font-size);
}
.list-tree li{
  line-height: var(--tree-item-height);
  padding-inline-start: var(--tree-offset);
  border-left: var(--tree-thickness) var(--tree-style) var(--tree-clr);
  position: relative;
  text-indent: .5rem;
  
  &:last-child {
    border-color: transparent; /* hide (not remove!) border on last li element*/
  }
  & span{
    font-size: 0.8rem;
    font-style: italic;
    font-weight: 100;
    opacity: .65;
    
  }
  &::before{
    content: '';
    position: absolute;
    top: calc(var(--tree-item-height) / 2 * -1 * var(--tree-font-size) + var(--tree-thickness));
    left: calc(var(--tree-thickness) * -1); 
    width: calc(var(--tree-offset) + var(--tree-thickness) * 2);
    height: calc(var(--tree-item-height)  * var(--tree-font-size));
    border-left: var(--tree-thickness) var(--tree-style) var(--tree-clr);
    border-bottom: var(--tree-thickness) var(--tree-style) var(--tree-clr);
  }
  &::after{
    content: '';
    position: absolute;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background-color: var(--tree-clr);
    top: calc(var(--tree-item-height) / 2 * 1rem);
    left: var(--tree-offset) ;
    translate: calc(var(--tree-thickness) * -1) calc(var(--tree-thickness) * -1);
  }
  & li li{
    /*
    change line color etc.
    --tree-clr: rgb(175, 208, 84);
    */
    --tree-style: dotted;
  }
}


/* general styling */
*,
::before,
::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
:root {
  --clr-bg: #222;
  --clr-primary: #f5f5f5;
  --clr-secondary: #075985;
}
html {
  background-color: var(--clr-bg);
  font-family: system-ui;
  font-family: system-ui;
}

body {
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1.5rem;
  /*font-size: clamp(0.9rem, 2.5vw,1.4rem);*/
  color: var(--clr-primary);
  padding: 1rem;
  background-image: radial-gradient(circle, rgba(175, 208, 84, .25) 1px, rgba(0, 0, 0, 0) 1px);
  background-size: 40px 40px;
}
h1 {
  font-size: clamp(1rem, 2.5vw + 0.25rem, 1.2rem);
  font-weight: 500;
  line-height: 1.6;
}
code,
pre {
  display: inline-block;
  color: #38bdf8;
  border: 1px solid hsl(from var(--clr-primary) h s 50% / 0.5);
  padding: 0.5rem 1rem;
  border-radius: 5px;
}
pre {
  white-space: pre-wrap;
}
em {
  font-size: 0.8rem;
}
body::after {
  content: "";
  position: fixed;
  top: 1rem;
  left: 1rem;
  width: 32px;
  height: 32px;
  background-size: cover;
}