.main-header {
    display: inline-block;
    margin-left: calc(50% - 500px);
    margin-top: 40px;
    width: 1000px;
    }

.main-header > nav > a {
    color: #4e4d5d;
    opacity: 0.8;
    font-size: 18px;
    text-decoration: none;
    font-family: tahoma;
    margin-left: 0.5em;
    border: 0.1em solid transparent;
    padding: 0.3em;
    padding-left: 1.2em;
    padding-right: 1.2em;
    display: inline-block;
    border-radius: 0.2em;
    line-height: 1em;
    transition: all 0.2s;
    border: 2px solid #fff;
    }
    
.main-nav {
    float: right;
    margin-top: 4px;
    }
    

.main-nav > a:hover {
    border: 2px solid #4e4d5d;
    }

.main-content {
    display: inline-block;
    margin-left: calc(50% - 500px);
    margin-top: 40px;
    width: 1000px;
}

.main-content > div {
    width: 35%;
    float: left;
}

.main-content > img {
    width: 60%;
    float: right;
}

.main-title {
    color: #4e4d5d;
    font-size: 55px;
    font-family: Arial, Helvetica, sans-serif;
}

.description {
    font-size: 19px;
    margin-top: -10px;
    line-height: 1.4em;
    letter-spacing: 0.05em;
    word-spacing: 0.1em;
    opacity: 0.5;
    font-family: tahoma;
}

.btn {
    background-color: #ff4879;
    font-family: Arial, Helvetica, sans-serif;
    margin-top: 28px;
    cursor: pointer;
    color: #fff;
    font-size: 20px;
    padding: 0.7em;
    padding-left: 1.9em;
    padding-right: 1.9em;
    text-decoration: none;
    border-radius: 0.4em;
    display: inline-block;
    box-shadow: 0px 0.5em 0.2em -0.45em #888;
    transition: all 1s;
}

.btn:hover {
    box-shadow: 0px 0.6em 0.4em -0.5em #555;
}

section {
    display: flex;
    width: 1000px;
    margin-left: calc(50% - 500px);
    margin-top: 30px;
}

section > div {
    width: 35%;
    margin-right: 25px;
}

h2 {
    font-size: 21px;
    font-family: Arial, Helvetica, sans-serif;
}

.bottom-paragraph {
    font-size: 16px;
    font-family: Tahoma;
    opacity: 0.5;
}