style.css

/*
Theme Name: My Custom Theme
Theme URI: https://yourwebsite.com
Author: Your Name
Author URI: https://yourwebsite.com
Description: This is my first custom theme!
Version: 1.0.0
License: GNU General Public License v2 or later
License URI: https://www.gnu.org/licenses/gpl-2.0.html
Text Domain: my-custom-theme
Tags: custom-background
*/

body {
    width: 960px;
    margin: auto;
    line-height: 1.65;
    font-family: Georgia, Times, Times New Roman, serif;
}

h1,
h2,
h3,
h4,
h5,
h6,
.menu {
    font-family: Helvetica Neue, Helvetica, Arial, sans-serif;
}

a {
	color: #073979;
}

.site-header {
    border-bottom: 2px solid
}

.site-title {
    font-size: 2rem;
    font-weight: bold;
    margin-bottom: .25rem;
    line-height: 1;
}

.site-title a {
    text-decoration: none;
    color: black
}

.site-description {
    margin-top: 0;
    color: #8e8e8e;
}

.menu {
    border-top: 1px solid #ccc;
}

.menu ul {
    list-style: none;
    padding: 0;
}

.menu ul li a {
    text-decoration: none;
    color: #696969;
}

.menu ul li a:hover {
    text-decoration: underline;
    color: #000;
}

.site-content {
    width: 640px;
    float: left;
}

article {
	margin-top: 2rem;
	margin-bottom: 2rem;
}

.sidebar {
    width: 280px;
    float: left;
    list-style: none;
    margin-top: 2em;
	font-size: 14px
}

.widgettitle {
    border-top: 2px solid;
    border-bottom: 1px solid #ccc;
    padding: .25rem 0;
    font-size: 1.25rem
}

.widget {
    margin-bottom: 3rem
}

label {
	display: block
}

.commentlist {
	list-style: none;
	padding-left: 0;
}