body {
    background-color: rgb(163, 28, 48);
    font-family: Helvetica, sans-serif;
    /* set padding on body instead of having to 
       do it for each of header, main, footer */
    padding-inline-start: 10%;
    padding-inline-end: 10%;
    padding-block-start: 2em;
    padding-block-end: 2em;
}
header, main, footer {
    background-color: rgb(255, 255, 255);
    border-style: solid;
    border-width: 0.25em;
    border-color: rgb(0,0,0);
    padding: 1em;
}
header {
    background-color: rgb(0,0,0);
    background-image: url(../images/opte-internet.jpg);
    background-position-x: 50%;
    background-position-y: 90%;
    background-repeat: no-repeat;
}
header h1 { 
    font-size: 3em;
    text-align: center;
    color: rgb(255,255,255);
    text-shadow: 0.05em 0.05em black;
}
main {
    margin-block-start: 2em;
    margin-block-end: 2em;
}
main section {
    background-repeat: no-repeat;
    background-size: 5em;
    padding-inline-start: 6em;
    margin-bottom: 2em;
}
section h2 { 
    color: rgb(163, 28, 48);
}
section p { 
    line-height: 1.5;
}
main section.markup {
    background-image: url(../images/logo-html5.png);
}
main section.styles {
    background-image: url(../images/logo-css3.png);
}
main section.scripts {
    background-image: url(../images/logo-js.png);
}


a:link, a:visited, a:hover, a:active {
    color: rgb(0,0,255);
    text-decoration: none;
} 
a:hover { 
    text-decoration: underline;
}