index.css

body {
    margin: 0;
    padding: 0;
    font-family: 'gothambookregular', arial, sans-serif;
    background: #1f1f1f;
    font-size: 1em;
}

#scroll_top
{
    position: fixed;
    bottom: 30px;
    right: 30px;
    z-index: 1000;
    display: none;
}


/*-----------------HEADER-----------------*/

header {
    background-color: black;
    display: flex;
    justify-content: center;
    padding: 50px;
}

.logo {
    width: 300px;
    height: 300px;
    background: white;
    display: flex;
    align-self: center;
    border-radius: 50%;
    overflow: hidden;
    justify-content: center;
}

.logo img {
    align-self: center;
    transition: all .5s ease; 
}

.logo img:hover {
    transform: scale(1.15);
    opacity: 0.7;
}

/*-----------------NAV-----------------*/

nav {
    background-color: #e8e8e8;
}

nav ul {
    margin: 0;
    padding: 0;
    display: flex;
    list-style: none;
    text-transform: uppercase;
    justify-content: center;
}

nav ul li {
    padding: 25px 20px;
}

nav ul a {
    text-decoration: none;
    color: black;
    font-weight: bold;
    transition: all .5s ease; 
}

nav ul a:hover {
    background: rgba(0, 0, 0, 0.4);
    color: white;
}


/*-----------------SECTION1-----------------*/

.content_1 {
    display: flex;
}

.content_1 article {
    flex: 1;
    padding: 100px 50px 70px 50px;
    border-right: 1px solid white;
    border-image: linear-gradient(to top, transparent 10%, #fff 50%, transparent 90%);
    border-image-slice: 1;
}

.content_1 article h2 {
    margin-bottom: 50px;
    text-align: center;
    text-transform: uppercase;
}

.content_1 article div {
    margin: 0 auto;
    width: 150px;
    height: 150px;
    display: flex;
    align-self: center;
    border-radius: 50%;
    overflow: hidden;
    justify-content: center;
}

.content_1 article div img {
    align-self: center;
}

.content_1 article:nth-child(1) {
    color: #24a294;
}

.content_1 article:nth-child(1) div {
    background: #24a294;
}

.content_1 article:nth-child(2) {
    color: #ec7a00;
}

.content_1 article:nth-child(2) div {
    background: #ec7a00;
}

.content_1 article:nth-child(3) {
    color: #bad169;
}

.content_1 article:nth-child(3) div {
    background: #bad169;
}

.content_1 article p {
    padding: 30px 0;
    color: white;
    font-family: arial, sans-serif;
}


/*-----------------SECTION2-----------------*/

.content_2 {
    padding: 100px 50px;
    background: #e3e3e3;
    border-bottom: 10px solid #dd2c48;
}

.content_2 h2 {
    margin: 0 0 100px 0;
    font-size: 3.2em;
    text-align: center;
    font-family: 'gothamexlightregular', arial, sans-serif;
}

.content_2 div {
    margin: 0 auto;
    width: 150px;
    height: 150px;
    display: flex;
    align-self: center;
    border-radius: 50%;
    overflow: hidden;
    justify-content: center;
    background: #dd2c48;
}

.content_2 div a {
    text-decoration: none;
    color: white;
    text-transform: uppercase;
    font-weight: bold;
    font-size: 14px;
    text-align: center;
    line-height: 150px;
}

/*-----------------SECTION3-----------------*/

.content_3 {
    position: relative;
    top: -60px;
    padding: 0 30px;
    min-height: 550px;
}

.content_3 h2 {
    position: relative;
    text-align: center;
    color: #dd2c48;
}

.content_3 div {
    display: flex;
}

.content_3 div article {
    flex: 1;
    padding: 0 15px;
}

.content_3 div article h3 {
    margin: 0;
    padding: 20px 0 40px 0;
}

.content_3 div article div {
    justify-content: center;
    
}

.content_3 div article div img {
    width: 100%;
    height: 100%;
    transition: all .5s ease; 
}

.content_3 div article div img:hover {
    transform: scale(1.15);
    opacity: 0.7;
}

.content_3 div article h3 {
    font-family: 'gothambookregular', arial, sans-serif;
    font-size: 1.3em;
}

.content_3 div article:nth-child(1) h3 {
    color: #b52773;
}

.content_3 div article:nth-child(2) h3 {
    color: #229f8e;
}

.content_3 div article:nth-child(3) h3 {
    color: #e16800;
}

.content_3 div article p {
    color: #fff;
    min-height: 100px;
}

.content_3 div article a {
    color: #fff;
    text-decoration: none;
    padding: 13px 10px;
    border-radius: 5px;
    font-size: 12px;
    font-weight: 900;
    text-transform: uppercase;
}

.content_3 div article:nth-child(1) a {
    background: #b52773;
}

.content_3 div article:nth-child(2) a {
    background: #229f8e;
}

.content_3 div article:nth-child(3) a {
    background: #e16800;
}

/*-----------------FOOTER-----------------*/

footer {
    background: #E5E5E5;
    display: flex;
    padding: 50px 30px;
}

footer article {
    flex: 1;
    padding: 0 30px 0 0;
}

footer article h3 {
    font-size: 2em;
    font-weight: bold;
    text-transform: uppercase;
    padding: 0 0 30px 0;
    margin: 0;
}

footer article img {
    transition: all .5s ease; 
}

footer article img:hover {
    transform: scale(1.15);
    opacity: 0.7;
}

footer article p {
    margin: 0;
}

footer article:nth-child(1) p {
    font-size: 1em;
    text-transform: uppercase;
}

footer article:nth-child(2) p {
    font-size: 0.7em;
    font-weight: bold;
    text-transform: uppercase;
}