:root {
  font-family: sans-serif;
  font-size: 16px;
}

body {
  margin: 0;
}

*, *::before, *::after {
  box-sizing: border-box;
  /* outline: red 1px solid; */
}

.app {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;

  display: grid;
  grid-template-rows: 4rem 1fr 4rem;
  grid-template-columns: 1fr;

  grid-template-areas:
    "header"
    "canvas"
    "footer"
  ;
}


.header {
  grid-area: header;
  display: flex;
  align-items: center;
  padding-left: 1rem;
  padding-right: 1rem;
  gap: 1rem;
  border-bottom: solid 1px #000;
}

.header__order {
  flex-grow: 1;
  font-weight: bold;
}

.canvas {
  grid-area: canvas;
}

.footer {
  grid-area: footer;
  border-top: solid 1px #000;
  display: flex;
  align-items: center;
  padding-left: 1rem;
  padding-right: 1rem;
  justify-content: space-between;
  gap: 1rem;
}

.button {
  padding: 0.25rem 1rem;
}