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

body {
    background-color: #d9dcd6;
}

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

/* removed class and header, there's only one h1 anyway */
h1 {
    display: inline-block;
    font-size: 48px;
}

/* changed div into mark */
mark {
    color: #d9dcd6;
    background-color: #2a607c;
}

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


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

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

p {
    font-size: 16px;
}

/* changed class hero to figure */
figure {
    height: 800px;
    width: 100%;
    margin-bottom: 25px;
    background-image: url("../images/digital-marketing-meeting.jpg");
    background-size: cover;
    background-position: center;
}

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

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

/* changed .content into section */
section {
    width: 75%;
    display: inline-block;
    margin-left: 20px;
}

/* changed .benefits into aside */
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;
}

/* consolidated 3 classes into 1 div which allowed for removal of quite a lot of code here */
div {
    margin-bottom: 32px;
    color: #ffffff;
}


div h3 {
    margin-bottom: 10px;
    text-align: center;
}


div img {
    display: block;
    margin: 10px auto;
    max-width: 150px;
}

/* again, 3 classes consolidated into 1 */
article {
    margin-bottom: 20px;
    padding: 50px;
    height: 300px;
    font-family: 'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
    background-color: #0072bb;
    color: #ffffff;
}

article img {
    max-height: 200px;
}

article h2 {
    margin-bottom: 20px;
    font-size: 36px;
}

/* removed class from footer and moved h2 details */
footer {
    padding: 30px;
    clear: both;
    font-family: 'Trebuchet MS', 'Lucida Sans Unicode', 'Lucida Grande', 'Lucida Sans', Arial, sans-serif;
    text-align: center;
    font-size: 20px;
}