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

body {
  font-family: Arial, Helvetica, sans-serif;
  overflow-x: hidden;
}

img {
  max-width: 100%;
}

.container {
  max-width: 1100px;
  margin-inline: auto;
}

span.invert-color {
  color: #cf0000;
}

.header h1 {
  width: fit-content;
  padding-block: .5rem;
  margin-inline-start: 1rem;
  text-align: center;
  font-size: 1.75rem;
}

.container-guide {
  margin: 2rem 1rem;
  display: flex;
  justify-items: center;
  flex-direction: column;
  gap: .5rem;
  border-top: 2px solid #eee;
  padding-block-start: 1rem;
}

.container-guide:first-of-type {
  margin-block-start: 0;
}

.container-guide img {
  display: block;
}

.container-guide h2 {
  font-size: 1.125rem;
  line-height: 1.25;
  margin-block-end: 1rem;
}

.container-guide p {
  line-height: 1.5;
}

@media (min-width: 640px) {
  .header h1 {
    text-align: start;
    border-bottom: 2px solid #777;
  }
  .container-guide {
    flex-direction: row;
    gap: 2rem;

    display: flex;
    align-items: center;
  }

 .container-guide img {
    width: 50%;
  }

  .container-guide:first-of-type {
    border-top-color: transparent;
    margin-block-start: 0;
  }

  .container-guide:nth-child(odd) img {
    order: 2;
  }

  .container-guide h2 {
    font-size: 1.5rem;
    margin-block-end: 2rem;
  }

  .container-guide p {
    line-height: 2;
  }
}