style.css

/* css Zen Garden default style v1.02 */
/* css released under Creative Commons License - http://creativecommons.org/licenses/by-nc-sa/1.0/  */

/* This file based on 'Tranquille' by Dave Shea */
/* You may use this file as a foundation for any new work, but you may find it easier to start from scratch. */
/* Not all elements are defined in this file, so you'll most likely want to refer to the xhtml as well. */

/* Your images should be linked as if the CSS file sits in the same folder as the images. ie. no paths. */


/* basic elements */
/*! HTML5 Boilerplate v5.3.0 | MIT License | https://html5boilerplate.com/ */

/*
 * What follows is the result of much research on cross-browser styling.
 * Credit left inline and big thanks to Nicolas Gallagher, Jonathan Neal,
 * Kroc Camen, and the H5BP dev community and team.
 */

/* ==========================================================================
   Base styles: opinionated defaults
   ========================================================================== */
@import url(https://fonts.googleapis.com/css?family=Pacifico);
@import url(https://fonts.googleapis.com/css?family=Indie+Flower);

html {  box-sizing: border-box; } *, *:before, *:after {  box-sizing: inherit; }

img {
	max-width: 100%; 
}

.clearfix {
  overflow: auto;
  zoom: 1;
}
html {
    color: #222;
    font-size: 1em;
    line-height: 1.4;
}
ol, ul {
    list-style: none;
}
a {
	text-decoration: none;
	color:purple;
}
/*
 * Remove text-shadow in selection highlight:
 * https://twitter.com/miketaylr/status/12228805301
 *
 * These selection rule sets have to be separate.
 * Customize the background color to match your design.
 */

::-moz-selection {
    background: #b3d4fc;
    text-shadow: none;
}

::selection {
    background: #b3d4fc;
    text-shadow: none;
}

/*
 * A better looking default horizontal rule
 */

hr {
    display: block;
    height: 1px;
    border: 0;
    border-top: 1px solid #ccc;
    margin: 1em 0;
    padding: 0;
}

/*
 * Remove the gap between audio, canvas, iframes,
 * images, videos and the bottom of their containers:
 * https://github.com/h5bp/html5-boilerplate/issues/440
 */

audio,
canvas,
iframe,
img,
svg,
video {
    vertical-align: middle;
}

/*
 * Remove default fieldset styles.
 */

fieldset {
    border: 0;
    margin: 0;
    padding: 0;
}

/*
 * Allow only vertical resizing of textareas.
 */

textarea {
    resize: vertical;
}

/* ==========================================================================
   Browser Upgrade Prompt
   ========================================================================== */

.browserupgrade {
    margin: 0.2em 0;
    background: #ccc;
    color: #000;
    padding: 0.2em 0;
}

/* ==========================================================================
   Author's custom styles
   ========================================================================== */
<link rel="shortcut icon" href="favicon.ico" type="image/x-icon">
<link rel="icon" href="favicon.ico" type="image/x-icon">

html, body{
	margin:0 auto;
	padding:0px;
}
body {
    background-image: url(back.jpg);
    background-repeat:no-repeat;
    background-attachment:fixed; 
    font-family: 'Indie Flower', cursive;
}
h1, h2, h3 {
    text-align: center;
    font-family: 'Pacifico', cursive;
    font-weight: 400;
}
ul, ol {
    padding-left: 0px;
}

.intro h1 {
    margin-top: 0px;
}
.summary {
    border: 3px solid black;
    height: auto;
    margin-top: 5%;
    margin-bottom: 5%;
}
.preamble {
    border: 3px solid red;
    height: auto;
    margin-top: 5%;
    margin-bottom: 5%;
}

.explanation {
    border: 3px solid orange;
    height: auto;
    margin-top: 5%;
    margin-bottom: 5%;
}
.participation {
    border: 3px solid purple;
    height: auto;
    margin-top: 5%;
    margin-bottom: 5%;
}
.benefits {
    border: 3px solid blue;
    height: auto;
    margin-top: 5%;
    margin-bottom: 5%;
}
.requirements {
    border: 3px solid white;
    height: auto;  
    margin-top: 5%;
    margin-bottom: 5%;
}
footer {

    text-align: center;
    height: auto;
    margin-top: 5%;
    margin-bottom: 5%;
}
footer a {
    padding-left: 1%;
    padding-right: 1%;
}
.sidebar {

    height: auto;
    margin-top: 5%;
    margin-bottom: 5%;
}
.design-selection {

    text-align: center;
}
.design-archives h3 {
    display: none;
}
.design-archives {

    text-align: center;
    margin-top: 5%;
    margin-bottom: 5%;
}
#design-archives li {
    display: inline;
    padding-left: 2.5%;
    padding-right: 2.5%;
}
.zen-resources h3 {
    display: none;
}
.zen-resources {
    height: auto;
    margin: 0 auto;
    text-align: center;
    margin-top: 5%;

}
.zen-resources li {
    display: inline;
    padding-right: 1%;
    padding-left: 1%;
}
@media (min-width:650px) {
h1, h2, h3 {
    font-family: 'Pacifico', cursive;
    font-weight: 400;  
}
p, li {
    font-family: 'Indie Flower', cursive; 
}
.summary {
    background-image: url(primary-css.png);
    float: left;
    width: 400px;
    height:400px;
    margin-left: 2.5%;
    margin-right: 2.5%;
    margin-top: 5%;
    margin-bottom: 5%;
    text-align: center;
    padding-top: 10%;
    transition: .5s;
}

.summary:hover {
    background-image: none;
}
.preamble {
    background-image: url(road.png);
    float: left;
    width: 400px;
    height:400px;
    margin-left: 2.5%;
    margin-right: 2.5%;
    margin-top: 5%;
    margin-bottom: 5%;
    transition: .5s;
}
.preamble:hover {
    background-image: none;
}

.explanation {
    background-image: url(about.png);
    width: 400px;
    height:400px;
    float: left;
    margin-left: 2.5%;
    margin-right: 2.5%;
    margin-top: 5%;
    margin-bottom: 5%;
    transition: .5s;
}
.explanation:hover {
    background-image: none;
}
.participation {
    background-image: url(participation.png);
    width: 400px;
    height:400px;
    float: left;
    margin-left: 2.5%;
    margin-right: 2.5%;
    margin-top: 5%;
    margin-bottom: 5%;
    font-size: 14px;
    transition: .5s;
}
.participation:hover {
    background-image: none;
}
.benefits {
    width: 40%;
    float: left;
    margin-left: 5%;
    margin-right: 5%;
    margin-top: 14%;
    margin-bottom: 5%;
}
.requirements {
    float: left;
    width: 90%;
    margin-left: 5%;
    margin-right: 5%;
    margin-top: 7%;
    margin-bottom: 5%;  
}
footer {
    text-align: center;
    margin-left: 5%;
    margin-right: 5%;
    margin-top: 5%;
    margin-bottom: 5%;
}
footer a {
    padding-left: 1%;
    padding-right: 1%;
}

.design-selection {
    text-align: center;
}
.design-archives h3 {
    display: none;
}
.design-archives {
    text-align: center;
    margin-top: 5%;
    margin-bottom: 5%;
}
#design-archives li {
    display: inline;
    padding-left: 2.5%;
    padding-right: 2.5%;
}
.zen-resources h3 {
    display: none;
}
.zen-resources {
    text-align: center;
    margin-top: 5%;
    margin-bottom: 5%;
}
.zen-resources li {
    display: inline;
    width: 100%;
    padding-right: 1%;
    padding-left: 1%;
}
}
/* ==========================================================================
   Helper classes
   ========================================================================== */

/*
 * Hide visually and from screen readers
 */

.hidden {
    display: none !important;
}

/*
 * Hide only visually, but have it available for screen readers:
 * http://snook.ca/archives/html_and_css/hiding-content-for-accessibility
 */

.visuallyhidden {
    border: 0;
    clip: rect(0 0 0 0);
    height: 1px;
    margin: -1px;
    overflow: hidden;
    padding: 0;
    position: absolute;
    width: 1px;
}

/*
 * Extends the .visuallyhidden class to allow the element
 * to be focusable when navigated to via the keyboard:
 * https://www.drupal.org/node/897638
 */

.visuallyhidden.focusable:active,
.visuallyhidden.focusable:focus {
    clip: auto;
    height: auto;
    margin: 0;
    overflow: visible;
    position: static;
    width: auto;
}

/*
 * Hide visually and from screen readers, but maintain layout
 */

.invisible {
    visibility: hidden;
}

/*
 * Clearfix: contain floats
 *
 * For modern browsers
 * 1. The space content is one way to avoid an Opera bug when the
 *    `contenteditable` attribute is included anywhere else in the document.
 *    Otherwise it causes space to appear at the top and bottom of elements
 *    that receive the `clearfix` class.
 * 2. The use of `table` rather than `block` is only necessary if using
 *    `:before` to contain the top-margins of child elements.
 */

.clearfix:before,
.clearfix:after {
    content: " "; /* 1 */
    display: table; /* 2 */
}

.clearfix:after {
    clear: both;
}

/* ==========================================================================
   EXAMPLE Media Queries for Responsive Design.
   These examples override the primary ('mobile first') styles.
   Modify as content requires.
   ========================================================================== */

@media only screen and (min-width: 35em) {
    /* Style adjustments for viewports that meet the condition */
}

@media print,
       (-webkit-min-device-pixel-ratio: 1.25),
       (min-resolution: 1.25dppx),
       (min-resolution: 120dpi) {
    /* Style adjustments for high resolution devices */
}

/* ==========================================================================
   Print styles.
   Inlined to avoid the additional HTTP request:
   http://www.phpied.com/delay-loading-your-print-css/
   ========================================================================== */

@media print {
    *,
    *:before,
    *:after,
    *:first-letter,
    *:first-line {
        background: transparent !important;
        color: #000 !important; /* Black prints faster:
                                   http://www.sanbeiji.com/archives/953 */
        box-shadow: none !important;
        text-shadow: none !important;
    }

    a,
    a:visited {
        text-decoration: underline;
    }

    a[href]:after {
        content: " (" attr(href) ")";
    }

    abbr[title]:after {
        content: " (" attr(title) ")";
    }

    /*
     * Don't show links that are fragment identifiers,
     * or use the `javascript:` pseudo protocol
     */

    a[href^="#"]:after,
    a[href^="javascript:"]:after {
        content: "";
    }

    pre,
    blockquote {
        border: 1px solid #999;
        page-break-inside: avoid;
    }

    /*
     * Printing Tables:
     * http://css-discuss.incutio.com/wiki/Printing_Tables
     */

    thead {
        display: table-header-group;
    }

    tr,
    img {
        page-break-inside: avoid;
    }

    img {
        max-width: 100% !important;
    }

    p,
    h2,
    h3 {
        orphans: 3;
        widows: 3;
    }

    h2,
    h3 {
        page-break-after: avoid;
    }
}