.your-custom-class-01 {
  display: block;
}

html {
font-size: calc(0.8em + 0.33vw);
font-family: Arial, Helvetica Neue, sans-serif;
line-height: 1.5;
line-height: 1.8;
color: #111;
background-color: #fefefe;
}
h1,
h2,
h3,
h4 {
line-height: 1.2;
letter-spacing: 2px;
}
p + p {
margin-top: 1rem;
}
.logo {
border: 0;
font-size: 1.5rem;
}