html,
body,
div,
span,
h1,
h2,
h3,
h4,
h5,
h6,
p,
a,
img,
ul,
ol,
li,
dl,
dt,
dd,
form,
label,
table,
tbody,
tr,
th,
td,
article,
aside,
main,
time,
figure,
figcaption,
footer,
header,
nav,
section {
  margin: 0;
  padding: 0;
  border: 0;
  font-size: 100%;
  font: inherit;
  vertical-align: baseline;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  line-height: 1;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

ul,
ol {
  list-style: none;
}

a {
  text-decoration: none;
  color: inherit;
}

img {
  max-width: 100%;
  /* width/height 属性がそのまま高さになって縦横比が崩れるのを防ぐ。
     CSS 側で height を指定している画像はそちらが優先される */
  height: auto;
  display: block;
}

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