html,
body,
div,
span,
object,
iframe,
h1,
h2,
h3,
h4,
h5,
h6,
p,
blockquote,
pre,
abbr,
address,
cite,
code,
del,
dfn,
em,
img,
ins,
kbd,
q,
samp,
small,
strong,
var,
b,
i,
a,
dl,
dt,
dd,
ol,
ul,
li,
button,
input,
textarea,
fieldset,
form,
label,
legend,
table,
caption,
tbody,
tfoot,
thead,
tr,
th,
td,
article,
aside,
canvas,
details,
figcaption,
figure,
footer,
header,
hgroup,
menu,
nav,
section,
summary,
main,
time,
mark,
audio,
video {
  margin: 0;
  padding: 0;
  border: none;
  outline: none;
  font-size: 100%;
  vertical-align: baseline;
  background: transparent;
  box-sizing: border-box;
}

article,
aside,
details,
figcaption,
figure,
footer,
header,
main,
menu,
nav,
section,
summary {
  display: block;
}

html {
  font-size: 62.5%; // 基準サイズは10px相当
}

body {
  -webkit-text-size-adjust: 100%;
  line-height: 1;
  font-size: 1.6rem; // 基本サイズは16px相当
  color: #000;

  font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", YuGothic, "ヒラギノ角ゴ ProN W3", Hiragino Kaku Gothic ProN, Arial, "メイリオ", Meiryo, sans-serif;
}