html - I can't seem to remove the top padding or margin, CSS -


i seem having issue science project. reason in safari , firefox (haven't tested chrome), there seems padding/margin on top menu, iframe seems working fine, i'll replace div , links nowhere, yet top of document doesn't , has guess top border, don't recall adding though. can't see whats wrong.

<!doctype html public "-//w3c//dtd xhtml 1.0 transitional//en" "http://www.w3.org/tr/xhtml1/dtd/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="content-type" content="text/html; charset=utf-8" /> <title>science project</title> <style> html, body {     margin: 0 0 0 0;     padding: 0;         width: 100%;         height: 100%;     background-color:#000; } div.header {     background-image: linear-gradient(to bottom, #ffffff 0%, #e0e0e0 100%);     height: 100px;     width: 100%;     font-family:arial, helvetica, sans-serif;     color: #000;     border-bottom:20px solid #09f;     border-top-left-radius:12px; } p.title {     padding-top: 20px;     padding-left:20px; } div.menu {     width:100%;     height:80px;     border-bottom-left-radius:12px;     background-color:#fff;     border-bottom: 1px solid #000; } a.button {     display:table-cell;     width:120px;     height:80px;     border-bottom-left-radius: 10px;     background-color:#999;     text-decoration:none;     color:#fff;     text-align:center;     font-family:"palatino linotype", "book antiqua", palatino, serif; } .content {     height:calc(100% - 221px);     width:100%; } </style> </head> <body> <div class='header'> <p class='title'>the big bang theory explained.</p> </div> <div class='menu'> <a class='button' target='content'><div class="centertext"><p>what big bang?</p></div></a> </div> <div class="content"></div> </body> </html>

if let me know i'm doing wrong here, able work last time. i'm finding rather odd.

jsfiddle: http://jsfiddle.net/ny4fh/

thanks!

josh

you experiencing margin-collapse.

<p class='title'>the big bang theory explained.</p>

paragraphs, default have top , bottom margin. problem. can prevent margin collapse with:

.header { overflow: hidden }

or other fancy tricks described here. (fiddle)


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