/* Reset CSS */
html, body, div, span, applet, object, iframe,
h1, h2, h3, h4, h5, h6, p, blockquote, pre,
a, abbr, acronym, address, big, cite, code,
del, dfn, em, img, ins, kbd, q, s, samp,
small, strike, strong, sub, sup, tt, var,
b, u, i, center,
dl, dt, dd, ol, ul, li,
fieldset, form, label, legend,
table, caption, tbody, tfoot, thead, tr, th, td,
article, aside, canvas, details, embed, 
figure, figcaption, footer, header, hgroup, 
menu, nav, output, ruby, section, summary,
time, mark, audio, video {
  margin: 0;
  padding: 0;
  border: 0;
  font-size: 100%;
  font: inherit;
  vertical-align: baseline;
}

/* HTML5 display-role reset for older browsers */
article, aside, details, figcaption, figure, 
footer, header, hgroup, menu, nav, section {
  display: block;
}

/* Box-sizingをborder-boxに統一 */
*, *::before, *::after {
  box-sizing: border-box;
}

/* リストのスタイルをリセット */
ol, ul {
  list-style: none;
}

/* テキストの装飾をリセット */
a {
  text-decoration: none;
  color: inherit;
}

/* テーブルのスタイルをリセット */
table {
  border-collapse: collapse;
  border-spacing: 0;
}

/* ボタンのスタイルリセット */
button {
  background: none;
  border: none;
  cursor: pointer;
  font: inherit;
}

/* 画像の最大幅を調整 */
img {
  max-width: 100%;
  height: auto;
  vertical-align: middle;
}