Unordered list issue

Question

My unordered list seems to be going out of it's parent element and going under it. I'm sure this is an easy fix but I just can't figure it out. I'm new to html and css.

I've added my codes here in hope of someone figuring something out for me. I think i've asked this question before. I'm not sure, anyways. Thanks in advance.

header {
	width: 100%;
	height: 36px;
	border-bottom: 1px solid #f0efef;
	box-shadow: 0 0 5px 0 #f0efef;
}

.header-content {
	width: 1030px;
	height: 36px;
	background-color: red;
}

.header-content p {
	margin: 0;
	font-size: 14px;
	padding: 7px 15px 0 15px;
}

.header-content ul {
	margin: 0;
	float: right;
	list-style: none;
	padding: 5px 15px 0 15px;
}

.header-content ul li {
	padding-left: 10px;
	display: inline;
}

.header-content ul li a, a:visited {
	color: #404040;
	font-size: 14px;
	text-decoration: none;
}

<header>
		<div class="header-content">
			<p>Welcome, please sign or register</p>
			<ul>
				<li><a href="#">My Account</a></li>
				<li><a href="#">Gift Cards</a></li>
				<li><a href="#">Customer Care</a></li>
				<li><a href="#">Community</a></li>
			</ul>
		</div>
	</header>

Answer 1

That paragraph element is a block level element so it's going to push your ul down. To solve the problem, you can float:left your p tag in the header

header {
	width: 100%;
	height: 36px;
	border-bottom: 1px solid #f0efef;
	box-shadow: 0 0 5px 0 #f0efef;
}

.header-content {
	width: 1030px;
	height: 36px;
	background-color: red;
}

.header-content p {
	margin: 0;
	font-size: 14px;
	padding: 7px 15px 0 15px;
        float:left;
}

.header-content ul {
	margin: 0;
	float: right;
	list-style: none;
	padding: 5px 15px 0 15px;
}

.header-content ul li {
	padding-left: 10px;
	display: inline;
}

.header-content ul li a, a:visited {
	color: #404040;
	font-size: 14px;
	text-decoration: none;
}

<header>
		<div class="header-content">
			<p>Welcome, please sign or register</p>
			<ul>
				<li><a href="#">My Account</a></li>
				<li><a href="#">Gift Cards</a></li>
				<li><a href="#">Customer Care</a></li>
				<li><a href="#">Community</a></li>
			</ul>
		</div>
	</header>