こんにちは、ページの中央に見出しを配置しようとしています。見出しの両側に配置する必要がある 2 つのロゴがあります。私は試しましたが、これらのどちらtext-align:centerも機能しませんでしたか? margin:0px auto変更が必要なのは私のレイアウトですか？または、CSS に何かが欠けていますか?
私のコードは以下にあるか、jsFiddleを表示できます
これを修正する方法と、将来これを行うときに心に留めておくべきことについての情報があれば幸いです
index.html
<div class="wrapper">
<header>
<h1>Website Service</h1>
<img src="imgs/logoa.png" id="sjplogo"/>
<img src="imgs/logob.png" id="sslogo"/>
</header>
<div class="maincontent"></div>
<footer>
</footer>
</div>
css/style.css
@charset "utf-8"; /* CSS ドキュメント */
/********************************
* CSS Reset *
*********************************/
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;
}
body {
height:100%;
line-height: 1;
background-color:#EEEEEE;
font-family:Gotham, "Helvetica Neue", Helvetica, Arial, sans-serif;
}
ol, ul {
list-style: none;
}
blockquote, q {
quotes: none;
}
blockquote:before, blockquote:after,
q:before, q:after {
content: '';
content: none;
}
table {
border-collapse: collapse;
border-spacing: 0;
}
/********************************
* Main Styles *
*********************************/
#wrapper {
height:100%
}
header {
background: #062141; /* Old browsers */
/* IE9 SVG, needs conditional override of 'filter' to 'none' */
background: url(data:image/svg+xml;base64,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);
background: -moz-linear-gradient(top, #062141 0%, #0f2f4e 25%, #2b5878 62%, #2b5878 99%); /* FF3.6+ */
background: -webkit-gradient(linear, left top, left bottom, color-stop(0%,#062141), color-stop(25%,#0f2f4e), color-stop(62%,#2b5878), color-stop(99%,#2b5878)); /* Chrome,Safari4+ */
background: -webkit-linear-gradient(top, #062141 0%,#0f2f4e 25%,#2b5878 62%,#2b5878 99%); /* Chrome10+,Safari5.1+ */
background: -o-linear-gradient(top, #062141 0%,#0f2f4e 25%,#2b5878 62%,#2b5878 99%); /* Opera 11.10+ */
background: -ms-linear-gradient(top, #062141 0%,#0f2f4e 25%,#2b5878 62%,#2b5878 99%); /* IE10+ */
background: linear-gradient(to bottom, #062141 0%,#0f2f4e 25%,#2b5878 62%,#2b5878 99%); /* W3C */
filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#062141', endColorstr='#2b5878',GradientType=0 ); /* IE6-8 */
height:100px;
width:auto;
}
header h1 {
text-align:center;
margin:0px auto;
font-size:42px;
color:white;
font-family:"ufonts com perpetua 2";
display:inline-block;
}
.maincontent {
height:600px;
}
#sjplogo {
float:left;
}
#sslogo {
float:right;
}
footer {
background: #062141; /* Old browsers */
/* IE9 SVG, needs conditional override of 'filter' to 'none' */
background: url(data:image/svg+xml;base64,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);
background: -moz-linear-gradient(top, #062141 0%, #0f2f4e 25%, #2b5878 62%, #2b5878 99%); /* FF3.6+ */
background: -webkit-gradient(linear, left top, left bottom, color-stop(0%,#062141), color-stop(25%,#0f2f4e), color-stop(62%,#2b5878), color-stop(99%,#2b5878)); /* Chrome,Safari4+ */
background: -webkit-linear-gradient(top, #062141 0%,#0f2f4e 25%,#2b5878 62%,#2b5878 99%); /* Chrome10+,Safari5.1+ */
background: -o-linear-gradient(top, #062141 0%,#0f2f4e 25%,#2b5878 62%,#2b5878 99%); /* Opera 11.10+ */
background: -ms-linear-gradient(top, #062141 0%,#0f2f4e 25%,#2b5878 62%,#2b5878 99%); /* IE10+ */
background: linear-gradient(to bottom, #062141 0%,#0f2f4e 25%,#2b5878 62%,#2b5878 99%); /* W3C */
filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#062141', endColorstr='#2b5878',GradientType=0 ); /* IE6-8 */
height:100px;
postion:absoutle;
bottom:0;
}