:root {
  --color-border: hsl(0, 0%, 50%);
  --border-radius: 5px;
  --value0: hsl(0, 0%, 0%);
  --value1: hsl(0, 0%, 11%);
  --value2: hsl(0, 0%, 22%);
  --value3: hsl(0, 0%, 33%);
  --value4: hsl(0, 0%, 44%);
  --value5: hsl(0, 0%, 55%);
  --value6: hsl(0, 0%, 66%);
  --value7: hsl(0, 0%, 77%);
  --value8: hsl(0, 0%, 88%);
  --value9: hsl(0, 0%, 100%);
  --text: 0;
}

body {
  color: hsl(0, 0%, calc(var(--text) * 11%));
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  padding: 0px;
  margin: 0px;
}

content {
  display: flex;
  flex-direction: column;
}

a {
  color: hsl(0, 0%, calc(var(--text) * 11%));
}

block {
  color: hsl(0, 0%, calc(var(--text) * 11%));
  display: flex;
  --spacing: space-evenly;
  justify-content: var(--spacing);
  flex-direction: column;
}

block > * {
  color: hsl(0, 0%, calc(var(--text) * 11%));
  display: flex;
  flex: 1 1 auto;
  --spacing: flex-start;
  justify-content: var(--spacing);
  align-self: stretch;
  flex-direction: column;
  margin: 2px;
}

.wide {
  width: 100%;
}

.no-flex {
  display: block;
  flex: unset;
  flex-direction: unset;
  align-self: unset;
}

.center {
  justify-content: center;
  align-items: center;
  align-self: center;
}

.center-text > * {
  text-align: center;
}

.center-self {
  align-self: center;
}

.vertical {
  flex-direction: column;
}

.horizontal {
  flex-direction: row;
}

grid {
  --cols: 1fr 1fr;
  --rows: auto;
  --gap: 0.5rem;

  color: hsl(0, 0%, calc(var(--text) * 11%));
  display: grid;
  grid-gap: var(--gap);
  grid-template-columns: var(--cols);
  grid-template-rows: var(--rows);
}

stack {
  color: hsl(0, 0%, calc(var(--text) * 11%));
  display: grid;
  grid-template-rows: 1fr;
  grid-template-columns: 1fr;
  grid-template-areas: "cover";
}

stack > * {
  color: hsl(0, 0%, calc(var(--text) * 11%));
  width: 100%;
  height: 100%;
  position: relative;
  grid-area: cover;
}

stack > .top {
  z-index: 10;
}

hr {
  --height: 1rem;
  min-height: var(--height);
  visibility: hidden;
}

hr.huge {
  --height: 3rem;
}

shape {
  --w: 100%;
  --h: 100%;
  --value: 4;

  color: hsl(0, 0%, calc(var(--text) * 11%));
  background-color: hsl(0, 0%, calc(var(--value) * 11%));
  display: flex;
  width: var(--w);
  min-width: var(--w);
  max-width: var(--w);
  height: var(--h);
  min-height: var(--h);
  max-height: var(--h);
  text-align: center;
  justify-content: center;
  align-items: center;
  align-self: center;
}

.debug {
  border: 1px solid red;
}

.debug > * {
  border: 1px solid blue;
}

.pad {
  --pad: 1rem;
  padding: var(--pad);
}

.sized {
  --w: 100%;
  --h: 100%;
  width: var(--w);
  min-width: var(--w);
  max-width: var(--w);
  height: var(--h);
  min-height: var(--h);
  max-height: var(--h);
}

.border {
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
}

.solid {
  --value: 8;
  background-color: hsl(0, 0%, calc(var(--value) * 11%));
}

.dots {
  --pat-val: 7;

  background-image: radial-gradient(hsl(0, 0%, calc(var(--pat-val) * 11%)) 1px, transparent 1px);
  background-size: calc(10 * 1px) calc(10 * 1px);
}

.lines {
  --pat-val: 7;
  background-image: linear-gradient(hsl(0, 0%, calc(var(--pat-val) * 11%)) 1px, transparent 1px), linear-gradient(to right, hsl(0, 0%, calc(var(--pat-val) * 11%)) 1px, transparent 1px);
  background-size: 10px 10px;
}

.stripes {
  --pat-val: 7;
  background-image: linear-gradient(90deg, transparent 50%, hsl(0, 0%, calc(var(--pat-val) * 11%)) 50%);
  background-size: 10px 10px;
}