style.css

main {
  --main-bg-color: #fff;
  --main-text-color: #000;
  --main-link-color: #000;
  --main-link-hover-color: #000;
  --main-link-visited-color: #000;
  --main-link-active-color: #000;
  --main-link-focus-color: #000;
  --main-btn-text-color: #000;
  --main-btn-bg-color: #fff;
  --main-btn-hover-text-color: #000;

  height: 90vh;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: repeat(2, 1fr);
  grid-gap: min(5vw, 5vh);
  grid-template-areas:
    'btn-1 btn-2 btn-3'
    'btn-4 btn-5 btn-6'
    'btn-wide btn-wide btn-wide';

  margin: 5vh 2vw;
}

main {
  font-family: 'Roboto', sans-serif;
  font-size: 36px;
  font-weight: 400;
  line-height: 1.5;
  color: #ffffff;
}

.btn {
  display: flex;
  justify-content: center;
  align-items: center;
  background-color: hsla(0, 0%, 100%, 0.209);
  border: none;
  color: white;
  text-decoration: none;
  font-size: 36px;
  cursor: pointer;
}

.btn-primary {
  grid-area: auto / auto / auto / auto;
}
.btn-wide {
  grid-area: btn-wide;
  min-height: 10vh;
}