css
/* 
 * This is the official style sheet for the subpages/usb-3-0-extensions subdomain.
 * 
 * Purpose: To provide an aesthetic overhaul for the USB 3.0 extensions, 
 *         bringing them into the 4th dimension of style.
 */

body {
  background-color: #f0f0f0;
  font-family: 'Bebas Neue', sans-serif;
  line-height: 1.5;
  margin: 0;
  padding: 0;
}

/* Header Styles */

header {
  background-color: #333;
  color: #fff;
  padding: 10px;
  border-bottom: 4px solid #666;
  border-top: 4px solid #777;
  text-align: center;
  font-weight: bold;
}

h1 {
  font-size: 24px;
  font-weight: normal;
  margin: 0;
  padding: 0;
  color: #f0f0f0;
  background-color: #333;
  border-bottom: 4px solid #666;
  border-top: 4px solid #777;
  text-shadow: 0 1px 0 #999;
}

/* Main Content Styles */

main {
  background-color: #f7f7f7;
  padding: 20px;
  width: 80%;
  margin: 0 auto;
  border-bottom: 1px solid #ccc;
  border-top: 1px solid #ddd;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

a {
  color: #000;
  text-decoration: none;
  font-weight: bold;
  text-shadow: 0 1px 0 #999;
  transition: color 0.1s ease;
}

a:hover {
  color: #000;
  text-decoration: none;
  text-shadow: 0 1px 0 #333;
  transition: color 0.1s ease;
}

/* Subpage Styles */

.subpage {
  background-color: #333;
  color: #fff;
  padding: 20px;
  border: 4px solid #444;
  border-radius: 10px;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
  margin: 10px;
  width: 90%;
  display: inline-block;
  position: relative;
  left: 5%;
  top: 10px;
}

.subpage:hover {
  background-color: #555;
  border-color: #777;
  box-shadow: 0 0 20px rgba(0, 0, 0, 0.2);
}

/* Link Styles */

.subpage a {
  color: #000;
  text-decoration: none;
  text-shadow: 0 1px 0 #999;
  transition: color 0.1s ease;
}

.subpage a:hover {
  color: #000;
  text-decoration: none;
  text-shadow: 0 1px 0 #333;
  transition: color 0.1s ease;
}

/* Footer Styles */

footer {
  background-color: #666;
  color: #fff;
  padding: 10px;
  border-top: 4px solid #777;
  border-bottom: 4px solid #666;
  text-align: center;
  font-weight: bold;
  position: absolute;
  bottom: 0;
  width: 100%;
  height: 20px;
  margin: 0;
  padding: 0;
}

/* Global Styles */

* {
  box-sizing: border-box;
  -moz-osx-font-stylable: none;
  text-rendering: optimizeLegibility;
  -webkit-appearance: none;
  border-radius: 0;
  border: 0;
  font-size: 1em;
  line-height: 1.5;
  margin: 0;
  padding: 0;
}