* {
  margin: 0;
  padding: 0;
}

*:before, *:after{
  box-sizing: border-box;
}

body {
  height: 100vh;
  width: 100vw;
}

.grid {
  display: flex;
  flex-direction: row;
  flex-grow: 1;
  flex-wrap: wrap;
  background: gray;
  height: inherit;
  width: inherit;
}

.grid-x {
  display: flex;
  flex-direction: column;
  flex-grow: 1;
  flex-wrap: wrap;
  background: gray;
  height: inherit;
  width: inherit;
  margin: 5px;
}

.grid-row {
  display: flex;
  flex-direction: row;
  flex-grow: 1;
  background: green;
  margin: 5px;
}

.grid-left-column {
  display: flex;
  width: 50px;
  height: inherit;
  flex-direction: column;
  background: black;
}

.grid-column {
  display: flex;
  flex-direction: row;
  flex-grow: 1;
  background: yellow;
  margin: 5px;
}