* {
  box-sizing: border-box;
  -webkit-box-sizing: border-box;
  -moz-box-sizing: border-box;
  -o-box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --red: #ed2938;
  --white: #fff;
  --blue: #002495;
  --flag-height: 150px;
}

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

/* Start styling */
.flag-france {
  display: flex;
  height: var(--flag-height);
  width: calc(var(--flag-height) * 3 / 2);
}

.stripe {
  flex-grow: 1;
}

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

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

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