JoeShep/index.html

## index.html
<!DOCTYPE html> <!-- tells browser what version-->
<html>
<head> <!-- header info, styles, meta etc-->
  <meta charset="UTF-8">  <!-- define alphabet-->
  <meta name="author" content="Joe Shepherd"> <!-- Define Page author -->
  <title>Hi there</title> <!--tab title-->
  <link rel="stylesheet" type="text/css" href="styles.css">
</head>
<body><!-- displays the page-->
  <nav>
    <ul class="top-nav">
      <li>home</li>
      <li>about us</li>
      <li>contact us</li>
    </ul>
  </nav>

  <div id="page-id" class="page-class">This is a page</div> <!-- block element-->

  <p>Before the floated stuff</p>

  <article class="left">A</article>
  <article class="left">B</article>
  <article class="right">C</article>
  <article class="right">D</article>

  <p class="floated-p">After the floated stuff</p>

  <form action="">
    <fieldset>
      <legend>My name</legend>
      <label for="first">First Name</label>
      <input type="text" placeholder="first name" name="first">
      <input type="email" placeholder="email address">
      <input type="password">
      <input type="radio">
      <input type="checkbox">
      <input type="range">
    </fieldset>
  </form>

  <div class="p-ancestor">
    <p>I am a direct child of the "p-ancestor" div</p>
    <div>
      <p>I am a grandchild of the "p-ancestor" div</p>
    </div>
  </div>

  <ul class="top">
    <li class="block">1</li>
    <li class="block">2</li>
    <li class="block">3</li>
    <li class="block">5</li>
  </ul>

  <span class="inline">X</span>
  <span class="inline">Y</span>
  <span class="inline">Z</span>

  <article class="n-child">
    <section> A </section>
    <div> X </div>
    <div> X </div>
    <section> B </section>
    <section> C </section>
    <section> D </section>
    <section> E </section>
  </article>

  <article class="n-type">
    <section> A </section>
    <section> B </section>
    <aside> Aside </aside>
    <aside> Aside </aside>
    <aside> Aside </aside>
    <aside> Aside </aside>
    <section> C </section>
    <section> D </section>
    <section> E </section>
  </article>

  <article class="first-of-type">
    <section> A </section>
    <section> B </section>
    <aside> Aside 1 </aside>
    <section> C </section>
    <section> D </section>
    <aside> Aside 2 </aside>
    <section> E </section>
    <footer>Footer</footer>
  </article>

  <article class="three">
    <section> A </section>
    <section> B </section>
    <aside> Aside </aside>
    <section> C </section>
    <section> D </section>
    <section> E </section>
  </article>

</body>
</html>

## styles.css
body {
  font-size: 30px;
  margin: 0;
  padding: 0;
}

article {
  border: 2px solid black;
}

label {
  font-size: 16px;
}

.top-nav {
  background-color: goldenrod;
  height: 55px;
}

.top-nav li {
  /*padding: 8px;*/
  /*margin: 8px;*/
  float: left;
  list-style-type: none;
  margin: 5px 15px 0 15px;
  font-family: "Arial";
  cursor: pointer;
  border: 1px solid rgba(0,0,0, .5);
  /*border-width: 1px;
  border-style: solid;*/
  /*border-color: black;*/
  border-radius: 10px;
  /*border-bottom-width: 3px;*/
  padding: 5px;
}

.top-nav li:hover {
  color: white;
}

.top-nav li:after {
  content: '!';
}

#page-id {
  color: red;
}

.page-class {
  color: green;
}
/*
.left {
  float: left;
}

.right {
  float: right;
}

.floated-p {
  text-align: right;
}*/

.p-ancestor > p {
  color: orange;
}

ul > li {
  list-style-type: none;
}

ul > li:not(:last-child):after {
  content: ",";
}

.block {
  display: inline;
}

.inline {
   border: 1px solid black;
   margin: 25px;
   display: block;
}

/*
  The algebraic formula below starts at 0.
  So for even items, the first calculation
  equates to 0, but there is no 0 item, so
  nothing gets selected.
*/

.n-child section:nth-child(even) {
/*.n-child section:nth-child(odd) {*/
  border: 1px solid black;
}

/* .n-child :not(:nth-child(even)) { */
/* .n-type section:nth-of-type(odd) { */
.n-type section:nth-of-type(2n+1) {
  color: blue;
}

.first-of-type aside:first-of-type {
  background-color: lime;
}

.first-of-type section:first-of-type {
  background-color: lime;
}

.three section {
  background-color: orange;
}

.three :first-child {
  background-color: lime;
}

.three :last-child {
  background-color: darkslategray;
}

article {
  margin: 0 0 50px 0;
  border: 1px solid gray;
  padding: 10px;
}

article:before {
  content: "Article parent element";
  border: 1px dashed gray;
  display: block;
  background-color: orange;
}
	<!DOCTYPE html> <!-- tells browser what version-->
	<html>
	<head> <!-- header info, styles, meta etc-->
	<meta charset="UTF-8"> <!-- define alphabet-->
	<meta name="author" content="Joe Shepherd"> <!-- Define Page author -->
	<title>Hi there</title> <!--tab title-->
	<link rel="stylesheet" type="text/css" href="styles.css">
	</head>
	<body><!-- displays the page-->
	<nav>
	<ul class="top-nav">
	<li>home</li>
	<li>about us</li>
	<li>contact us</li>
	</ul>
	</nav>

	<div id="page-id" class="page-class">This is a page</div> <!-- block element-->

	<p>Before the floated stuff</p>

	<article class="left">A</article>
	<article class="left">B</article>
	<article class="right">C</article>
	<article class="right">D</article>

	<p class="floated-p">After the floated stuff</p>

	<form action="">
	<fieldset>
	<legend>My name</legend>
	<label for="first">First Name</label>
	<input type="text" placeholder="first name" name="first">
	<input type="email" placeholder="email address">
	<input type="password">
	<input type="radio">
	<input type="checkbox">
	<input type="range">
	</fieldset>
	</form>

	<div class="p-ancestor">
	<p>I am a direct child of the "p-ancestor" div</p>
	<div>
	<p>I am a grandchild of the "p-ancestor" div</p>
	</div>
	</div>

	<ul class="top">
	<li class="block">1</li>
	<li class="block">2</li>
	<li class="block">3</li>
	<li class="block">5</li>
	</ul>

	<span class="inline">X</span>
	<span class="inline">Y</span>
	<span class="inline">Z</span>

	<article class="n-child">
	<section> A </section>
	<div> X </div>
	<div> X </div>
	<section> B </section>
	<section> C </section>
	<section> D </section>
	<section> E </section>
	</article>

	<article class="n-type">
	<section> A </section>
	<section> B </section>
	<aside> Aside </aside>
	<aside> Aside </aside>
	<aside> Aside </aside>
	<aside> Aside </aside>
	<section> C </section>
	<section> D </section>
	<section> E </section>
	</article>

	<article class="first-of-type">
	<section> A </section>
	<section> B </section>
	<aside> Aside 1 </aside>
	<section> C </section>
	<section> D </section>
	<aside> Aside 2 </aside>
	<section> E </section>
	<footer>Footer</footer>
	</article>

	<article class="three">
	<section> A </section>
	<section> B </section>
	<aside> Aside </aside>
	<section> C </section>
	<section> D </section>
	<section> E </section>
	</article>

	</body>
	</html>
	body {
	font-size: 30px;
	margin: 0;
	padding: 0;
	}

	article {
	border: 2px solid black;
	}

	label {
	font-size: 16px;
	}

	.top-nav {
	background-color: goldenrod;
	height: 55px;
	}

	.top-nav li {
	/padding: 8px;/
	/margin: 8px;/
	float: left;
	list-style-type: none;
	margin: 5px 15px 0 15px;
	font-family: "Arial";
	cursor: pointer;
	border: 1px solid rgba(0,0,0, .5);
	/*border-width: 1px;
	border-style: solid;*/
	/border-color: black;/
	border-radius: 10px;
	/border-bottom-width: 3px;/
	padding: 5px;
	}

	.top-nav li:hover {
	color: white;
	}

	.top-nav li:after {
	content: '!';
	}

	#page-id {
	color: red;
	}

	.page-class {
	color: green;
	}
	/*
	.left {
	float: left;
	}

	.right {
	float: right;
	}

	.floated-p {
	text-align: right;
	}*/

	.p-ancestor > p {
	color: orange;
	}

	ul > li {
	list-style-type: none;
	}

	ul > li:not(:last-child):after {
	content: ",";
	}

	.block {
	display: inline;
	}

	.inline {
	border: 1px solid black;
	margin: 25px;
	display: block;
	}

	/*
	The algebraic formula below starts at 0.
	So for even items, the first calculation
	equates to 0, but there is no 0 item, so
	nothing gets selected.
	*/

	.n-child section:nth-child(even) {
	/.n-child section:nth-child(odd) {/
	border: 1px solid black;
	}

	/* .n-child :not(:nth-child(even)) { */
	/* .n-type section:nth-of-type(odd) { */
	.n-type section:nth-of-type(2n+1) {
	color: blue;
	}

	.first-of-type aside:first-of-type {
	background-color: lime;
	}

	.first-of-type section:first-of-type {
	background-color: lime;
	}

	.three section {
	background-color: orange;
	}

	.three :first-child {
	background-color: lime;
	}

	.three :last-child {
	background-color: darkslategray;
	}

	article {
	margin: 0 0 50px 0;
	border: 1px solid gray;
	padding: 10px;
	}

	article:before {
	content: "Article parent element";
	border: 1px dashed gray;
	display: block;
	background-color: orange;
	}