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

:root {
  --main-color: #156ef3;
  --sub-color: #baefff;
}

body {
  margin: 32px;
  color: #222;
  font-family: sans-serif;
  font-size: 1rem;
  background-color: #fff;

  @media (width <= 768px) {
    margin: 16px;
    font-size: 0.75rem;
  }
}

.contents {
  max-width: 730px;
  margin: 0 auto;
  overflow: hidden;
}

.demo {
  h1 {
    margin-bottom: 16px;
    font-size: 1.5rem;
    font-weight: bold;
  }

  .hoverHere {
    margin-bottom: 6px;
    color: var(--main-color);
    font-size: 0.9rem;
  }
}

.wrapper {
  width: 100%;
  height: 300px;
  background-color: white;
  border: 1px solid silver;
  border-radius: 10px;
}

.fullscreen {
  height: 100%;

  body {
    height: 100%;
    margin: 0;

    > .wrapper {
      width: 100%;
      height: 100%;
      border: 0;
      border-radius: 0;
    }
  }
}