<div class="flex__container">
  <div class="flex__item">Lorem ipsum dolor sit amet</div>
  <div class="flex__item">Lorem ipsum dolor sit amet consectetur adipisicing elit</div>
  <div class="flex__item">Fugiat dolor nihil saepe. Nobis nihil minus similique hic quas mollitia.</div>
  <div class="flex__item">Lorem ipsum dolor sit amet consectetur adipisicing elit. Molestias consequuntur sequi suscipit iure fuga ea!</div>
</div>

@import url("https://fonts.googleapis.com/css?family=Gochi+Hand");

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

body {
  width: 100vw;
  min-height: 100vh;
  margin: 0;
  background-color: #291642;
  font-family: "Gochi Hand", sans-serif;
  font-size: 100%;
  letter-spacing: 0.1rem;
  color: #fff;
  display: flex;
  justify-content: center;
  align-items: center;
}

:root {
  --width: 120px;
}

.flex__container {
  width: 600px;
  display: flex;

  border: 1px dashed #f36;
  align-items: stretch;
}

.flex__item {
  min-block-size: 20vh;

  display: flex;
  justify-content: center;
  align-items: center;

  width: var(--width);
}

.flex__item:nth-child(1) {
  background-color: #f36;
}

.flex__item:nth-child(2) {
  background-color: #ff5722;
}

.flex__item:nth-child(3) {
  background-color: #2196f3;
}

.flex__item:nth-child(4) {
  background-color: #8bc34a;
}