:root {
  --bgcolor: #f9f6fe;
  --text-color: #74559c;
}

select,
body {
  background-color: var(--bgcolor);
  color: var(--text-color);
}

.container {
  padding-inline: 20px;
  padding-block: 20px;

  h1 {
    color: var(--text-color);
  }
  p {
    text-align: justify;
  }
  .boxes {
    display: flex;
    gap: 20px;
    margin-block-start: 20px;

    .box {
      inline-size: 100px;
      block-size: 100px;
      background-color: turquoise;
      border-radius: 10px;
      justify-content: center;
      display: flex;
      align-items: center;
    }
  }
}

html {
  &:has(option[value="purple"]:checked) {
    --text-color: #74559c;
  }
  &:has(option[value="glowing-scarlet"]:checked) {
    --text-color: #c04646;
  }
}