html,
body {
  margin: 0;
  padding: 0;
}

body {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
}

:root {
  --black: #000000;
  --red: #de0002;
  --yellow: #ffce00;
  --flag-height: 150px;
}

/* Start styling */
.flag-germany {
  display: flex;
  flex-direction: column;
  width: calc(5 * var(--flag-height) / 3);
  height: var(--flag-height);
}

.stripe {
  flex-grow: 1;
}

.black {
  background-color: var(--black);
}

.red {
  background-color: var(--red);
}

.yellow {
  background-color: var(--yellow);
}