I want to create a styleguide for a website, and say I have a h1 I always want there to be 28px bottom margin before the next text whatever it is, from the foot of the letters to the top of next letters. Problem is that in HTML if the line-height's always add some extra spacing, and it might differ for each text. Is there a rule to know exactly how much margin-bottom to use so it will always be 28px for example?
<h1>HL1: Meine Bestellungen</h1>
<h2>SL1: Bestellnr. 1234563</h2>
h1 {
background: none repeat scroll 0 0 rgb(255, 255, 0);
color: rgb(153, 145, 141);
font-family: Georgia;
font-size: 26px;
font-weight: normal;
letter-spacing: 0;
line-height: 30px;
margin-bottom: 28px;
text-decoration: none;
text-transform: uppercase;
}
h2 {
background: none repeat scroll 0 0 rgb(0, 255, 0);
color: rgb(196, 18, 47);
font-family: Lucida Sans;
font-size: 12px;
font-weight: normal;
letter-spacing: 0.1em;
line-height: 20px;
margin-bottom: 6px;
text-decoration: none;
text-transform: uppercase;
}
Thanks!