iphone 5 portrait resolution

Hi,

for some reason my portrait iphone resolution is slightly off.

This is the link to take a look.

I have some css code to handle device sizes but it doesn;t seem to work for the portrait layout (landscape iphone and tablets for fines).

Here is the code I have:

/*ipad resolution for videos */
@media only screen 
and (min-device-width : 768px) 
and (max-device-width : 1024px) 
and (orientation : landscape) { /* STYLES GO HERE */
	.avia-webkit-7 #homevideo{
   	height: 340px;
  	margin: 0 auto;
  	display: block;
  }
  
}  

/*Iphone size changes 568 768*/
@media only screen and (max-width: 350px) {

 
/*background image on Il Corso - donna spalla*/  
#acquista div.av-parallax.avia-full-stretch {
    display: none !important;
  }
  
/*front page stuff*/
.corso_tit p {
font-size: 25px !important;
width: 90% !important;
margin-left: 15px !important;
}
.corso_cap p {
margin-left: 10px !important;
font-size: 18px !important;
width: 90% !important;
}

  
  
#av_section_1 {
background-image: none !important;
}
  
.responsive .mobile_menu_tablet .main_menu { display: block; }

  .avia-webkit-7 #homevideo{
  /*max-width: 280px;*/
   height: 240px; 
  margin: 0 auto;
  display: block;
}
/*last braket of screen size css above*/}