/* CSSリセット */
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, sub, sup, var,
b, i, u,
dl, dt, dd, ol, ul, li,
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,
time, mark, audio, video {
    margin: 0;
    padding: 0;
    border: 0;
    font-size: 100%;
    vertical-align: baseline;
    background: transparent;
}

body {
    line-height: 1.5; /* 可読性向上 */
    font-family: sans-serif; /* デフォルトフォント指定（必要なら変更） */
}

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

ul {
    list-style: none;
}

blockquote, q {
    quotes: auto; /* quotesをリセットせずに適切に表示 */
}

a {
    text-decoration: none;
    color: inherit; /* デフォルトのリンクカラーを継承 */
}

ins {
    text-decoration: underline; /* `ins` は通常下線付き */
}

mark {
    background-color: yellow; /* `mark` は目立たせるため黄色が一般的 */
}

del {
    text-decoration: line-through;
}

table {
    border-collapse: collapse;
    border-spacing: 0;
}

hr {
    display: block;
    height: 1px;
    border: 0;
    border-top: 1px solid #ccc;
    margin: 1em 0;
}

input, select, button, textarea {
    font: inherit; /* デフォルトフォントを適用 */
    vertical-align: middle;
}