html - Header CSS breaking -


i'm pretty terrible @ css/design i'm struggling css here.

the page looks fine when loaded in full screen browser @ 1920x1080, however, minimise or load page on mobile device header content loses placing body fine.

here's css elements in question:

#header {  background: url(assets/header_bckg.gif) repeat-x ; height:120px;   }  #logo { display:inline-block; float:mid-left; padding:50px 0 0 570px; } #logo { color:#ffffff; text-decoration:none; font-weight:bold; height:12px; font-size:20px; text-transform:uppercase;}   #login { display:inline-block; float:mid-right; padding-left:400px; padding-bottom: 7px; vertical-align:middle;} #login{ color:#ffffff; text-decoration:none; font-weight:bold; height:12px; font-size:12px; text-transform:uppercase;}   #avatar { display:inline-block; position:absolute; margin-top:28px; float:mid-right; padding-left: 505px; padding-bottom: 15px; vertical-align:middle; }  #avatar_online {     background: linear-gradient(to bottom, #7bafd6 5%, #506d92 95%) repeat scroll 0 0 transparent;     filter: none;     height: 50px;     width: 50px;     padding: 3px;     background-color: #545454;     border-radius: 3px 3px 3px 3px;      }  #avatar_offline {        background: linear-gradient(to bottom, #706c6b 5%, #4e4d4d 95%) repeat scroll 0 0 transparent;     filter: none;     height: 50px;     width: 50px;     padding: 3px;     border: 1px solid #545454;     border-radius: 3px 3px 3px 3px;      }     #avatar_playing {            background: linear-gradient(to bottom, #9bc861 5%, #789e4c 95%) repeat scroll 0 0 transparent;     filter: none;         height: 50px;     width: 50px;     padding: 3px;     border: 1px solid #545454;     border-radius: 3px 3px 3px 3px;      }  #menu {position: absolute; margin-left:550px; top:88px; color:#fff; text-align:center; margin-top:0px;} #menu ul{ width:800px; margin:0 auto;list-style:none; padding:0; text-align:left;} #menu ul li{display:inline} #menu ul { float:left; font-weight:bold; font-size:13px; text-decoration:none; color:#fff; padding:8px 10px; width:118px; text-align:center; text-transform:uppercase; background:url(assets/menu_active.gif) no-repeat bottom center; color:#232323; } #menu ul a:hover {      color: #85b0df;     cursor: pointer;     text-decoration: none; } 

as always, appreciated.

  1. make sure css , html valid. others have pointed out, there no such thing float:mid-left. also, if jsfiddle indicative of html, you're throwing browsers quirksmode, because html isn't structured (your first 3 tags need wrapped in <head> tag, needs wrapped in <html> tag, , first line should <!doctype html>). use w3c's html validator , css validator ensure code correct. can begin fix other issues.

  2. learn various css declarations do. while css may valid, doesn't mean it's right. this: #avatar { display:inline-block; position:absolute; margin-top:28px; float:mid-right; padding-left: 505px; padding-bottom: 15px; vertical-align:middle; } technically validate once float part fixed. however, position: absolute , float mutually exclusive -- float doesn't work when position absolute or fixed. learn how padding , margin affect positioning of element, , how differ 1 another. finally, vertical-align doesn't work @ unless element table cell, or display set table-cell (and table-related set of display properties has own quirks, can't throw display: table-cell on element , expect work way).

  3. learn how elements naturally behave, can work with them, instead of against them. make sure know how block, inline, , inline-block elements behave, , work them layout want, instead of throwing display: inline-block on , hoping best. same goes things links (which naturally have cursor: pointer on hover, unless you've disabled elsewhere). doing substantially clean css, making easier maintain. may clean html, find out wrapper elements need or can without.


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