* {
  box-sizing: border-box;
  font-family: system-ui, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
  font-size: 16px;
}

body {
  background-color: #FFFFFF;
  margin: 0;
}

.content {
  width: 800px;
  margin: 0 auto;
}
.content h2 {
  margin: 0;
  padding: 25px 0;
  font-size: 22px;
  border-bottom: 1px solid #ebebeb;
  color: #666666;
}

@media screen and (max-width: 800px) {

  .content {
    padding: 10px;
    width: 100%;
  }
  .responsive-width-100 {
    width: 100%;
    max-width: 100%;
    min-width: 100%;
  }
}