* {
    box-sizing: border-box;
    padding: 0;
    margin: 0;
}

body {
    background-color: #d9dcd6;
}

header {
    padding: 20px;
    font-family: 'Trebuchet MS', 'Lucida Sans Unicode', 'Lucida Grande', 'Lucida Sans', Arial, sans-serif;
    background-color: #2a607c;
    color: #ffffff;
}

header h1 { /*changed from class to element select to select header*/
    display: inline-block;
    font-size: 48px;
}

header h1 .seo {
    color: #d9dcd6;
}

header nav {
    padding-top: 15px;
    margin-right: 20px;
    float: right;
    font-family: 'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
    font-size: 20px;
}

header nav ul {
    list-style-type: none;
}

header nav ul li {
    display: inline-block;
    margin-left: 25px;
}

a {
    color: #ffffff;
    text-decoration: none;
}

p {
    font-size: 16px;
}

.marketing-image {
    height: 1100px;
    width: 100%;
    margin-bottom: 25px;
    background-size: cover;
    background-position: center;
}

.float-left {
    float: left;
    margin-right: 25px;
}

.float-right {
    float: right;
    margin-left: 25px;
}

.content {
    width: 75%;
    display: inline-block;
    margin-left: 20px;
}

aside { /*changed from class to element select to select aside*/
    margin-right: 20px;
    padding: 20px;
    clear: both;
    float: right;
    width: 20%;
    height: 100%;
    font-family: 'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
    background-color: #2589bd;
}

.benefit-lead, .benefit-brand, .benefit-cost { /*Changed classes to one line that share the same properties*/
    margin-bottom: 32px;
    color: #ffffff;
}

.benefit-lead h3, .benefit-brand h3, .benefit-cost h3 { /*Changed classes to one line that share the same properties*/
    margin-bottom: 10px;
    text-align: center;
}

.benefit-lead img, .benefit-brand img, .benefit-cost img { /*Changed classes to one line that share the same properties*/
    display: block;
    margin: 10px auto;
    max-width: 150px;
}

.search-engine-optimization, .online-reputation-management, .social-media-marketing { /*Changed classes to one line that share the same properties*/
    margin-bottom: 20px;
    padding: 50px;
    height: 300px;
    font-family: 'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
    background-color: #0072bb;
    color: #ffffff;
}

.search-engine-optimization img, .online-reputation-management img, .social-media-marketing img { /*Changed classes to one line that share the same properties*/
    max-height: 200px;
}

.search-engine-optimization h2, .online-reputation-management h2, .social-media-marketing h2 { /*Changed classes to one line that share the same properties*/
    margin-bottom: 20px;
    font-size: 36px;
}

footer { /*changed from class to element select to select footer*/
    padding: 30px;
    clear: both;
    font-family: 'Trebuchet MS', 'Lucida Sans Unicode', 'Lucida Grande', 'Lucida Sans', Arial, sans-serif;
    text-align: center;
}

footer h4 {
    font-size: 20px;
}