Trouble with CSS format [closed] - html

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I cant for the life of me find out whats wrong with the CSS code, I cant get the font in main <p> to be 20px and can't properly center the address in the footer. I am only allowed to edit css file.
Html file:
http://www.mediafire.com/view/68bcokhw6tb086g/redball.htm
CSS file:
http://www.mediafire.com/view/9rk9dracsz47sn7/pizza.css
CSS code:
/*
New Perspectives on HTML and CSS
Tutorial 4
Case Problem 2
Pizza Style Sheet
Author: Joesph Aguilar
Date: 01/31/2014
Filename: pizza.css
Supporting Files:
*/
/* Display Block Elements */
header, section, aside, footer, nav{
display: block;
}
/* Padding and Margin Style */
*{
padding: 0px;
margin: 0px;
}
/* Body Style */
body{
background-color: red;
font-family: Verdana, Geneva, sans-serif;
}
/* Container Style */
#container{
width: 1000px;
margin-top: 0px;
margin-bottom: 0px;
margin-left: auto;
margin-right: auto;
border-left: 1px solid black;
border-right: 1px solid black;
background: white url('redbar.png') repeat-y left top;
}
/*Header Style */
header{
background-color: white;
height: 100px;
}
/* Horizontal Nav Style */
nav.horizontal{
background-color: white;
height: 70px;
width: 100%;
}
nav.horizontal li{
background-color: white;
font-size: 16px;
height: 50px;
line-height: 50px;
width: 180px;
display: block;
float: left;
margin-left: 5px;
margin-right: 5px;
text-align: center;
}
nav.horizontal li a{
display: block;
background-color: red;
color: white;
border-radius: 30px / 25px;
-moz-border-radius: 30px / 25px;
-webkit-border-radius: 30px / 25px;
text-decoration: none;
}
nav.horizontal li a:hover{
background-color: (255, 101, 101);
color: black;
}
/* Vertical Nav Style */
nav.vertical{
clear: left;
float: left;
width: 200px;
}
nav.vertical li{
list-style-type: none;
text-indent: 20px;
margin-top: 20px;
margin-bottom: 20px;
}
nav.vertical li a{
color: white;
text-decoration: none;
}
nav.vertical li a:hover{
color: black;
}
/* Section Style */
#main{
background-color: rgb(255, 211, 211);
float: left;
width: 600px;
}
#main > p {
font-size: 20px;
margin: 15px;
}
#main img{
float: right;
margin: 15px;
width: 350px;
border-bottom-left-radius: 350px;
-moz-border-radius-bottomleft: 350px;
-webkit-bottom-left-radius: 350px;
}
/* Coupon Style */
#main div.coupon{
border: 5px;
border-style: dashed;
float: left;
width: 170px;
height: 150px;
margin-top: 20px;
margin-bottom: 20px;
margin-left: 10px;
margin-right: 10px;
background: white url('slice.png') no-repeat right bottom;
}
#main div.coupon h1{
color: white;
background: rgb(192, 0, 0);
font-size: 16px;
letter-spacing: 2px;
text-align: center;
height: 25px;
font-variant: small-caps;
}
#main div.coupon p{
font-size: 14px;
text-align: center;
margin: 5px;
}
/* Aside Style */
aside{
float: left;
width: 200px;
}
aside h1{
color: rgb(192, 0, 0);
font-size: 20px;
letter-spacing: 2px;
font-weight: normal;
text-align: center;
}
aside li{
background-color: rgb(255, 135, 135);
border-radius: 5px;
list-style-type: none;
margin: 10px;
padding: 5px;
}
/*Footer Style*/
footer{
clear: left;
margin-left: 200px;
}
footer address{
border-top-style: 1px solid red top;
color: red;
font-size: 10px;
font-style: normal;
text-align: center;
margin-top: 25px;
padding-bottom: 20px;
}

Answer 1

The address is centered in the footer. Your problem is that you want the address centered on section#main, and the footer isn't in the section#main, it's in div#container, resulting in an address centered to the whole container.
However, since your aside has a static width of 200px, we can add that as a margin into footer>address, so that it centers the content accordingly.
So, we want on footer address is:
margin-right:200px;
but since we already have
margin-top:25px;
we can just delete that margin-top line and say both with:
margin:25px 200px 0 0;
which is shorthand for margin top 25px right 200px bottom 0 left 0.
Finally, the correct way to post this would be on JSFiddle, it's super easy to figure out, and I put my solution for your problem here:
http://jsfiddle.net/R8Hsv/

Answer 2

All about your font size seems fine, at least I can change it. How do you expect 20px to be?
Had to set a width for your footer, to the same as the main.
footer address{
border-top-style: 1px solid red top;
color: red;
font-size: 10px;
font-style: normal;
text-align: center;
margin-top: 25px;
padding-bottom: 20px;
width:600px;
}
JSFIDDLE: http://jsfiddle.net/42h96/1/