:root {
  --color-black: #000000;
  --color-white: #ffffff;

  --color-background: var(--color-white);
  --color-text: var(--color-black);
}

html, body{
  display: grid;
  grid-template-columns: 1fr;

  width: 100vw;
  height: 100vh;
  
  min-width: 100vw;
  min-height: 100vh;

  padding: 0;
  margin: 0;

  background: var(--color-background);
  
  color: var(--color-text);

  font-family: monospace;

  overflow: hidden;
}

input, button {
  background: var(--color-background);

  border-radius: 0;
  border: 1px solid var(--color-text);

  color: var(--color-text);
}

.box {
  min-height: 12.5vw;
}

.box.text {
  display: grid;
  grid-template-columns: 1fr;
  min-height: 0;
}

.section {
  display: grid;

  grid-template-columns: 1fr 1fr 1fr 1fr 1fr 1fr 1fr 1fr;

  overflow: scroll;
}

.section.inputs *:nth-child(1) {
  grid-column-start: 1;
  grid-column-end: 3;

  height: 4rem;
}

.section.inputs *:nth-child(2) {
  grid-column-start: 3;
  grid-column-end: 6;

  height: 4rem;
}

.section.inputs *:nth-child(3) {
  grid-column-start: 6;
  grid-column-end: 9;

  height: 4rem;
}

header {
  position: fixed;
  top: 5px;
  left: 30px;
}

header a {
  line-height: normal;
  letter-spacing: 0.5px;
  text-rendering: optimizeLegibility;
  
  font-size: 10px;
  font-weight: 700;

  user-select: none;

  opacity: 0.5;

  transition: opacity 250ms ease-in-out;
}

header a:active,
header a:visited,
header a:link,
header a:focus,
header a:hover {
  text-decoration: none;
  color: var(--color-text);
}

header a:hover,
header a:focus,
header a:active {
  opacity: 1;
}