remove-empty-space-above-blogger-header

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Now add the following code just above the </head> tag:
<style type='text/css'>
.content-inner 
{ 
margin-top: -40px !important; 
}
</style>

You can change the -40px to any desired value. Keep experimenting with this value to adjust the header's position.

Another code

#main{
  position:relative;
  top:-100px;
}

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