/* reset.css */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* 讓所有元素回歸預設 */
html, body {
  height: 100%;
  font-size: 100%;
  line-height: 1.5;
  font-family: sans-serif;
}

img {
  max-width: 100%;
  display: block;
}

button {
  background: none;
  border: none;
  cursor: pointer;
}