main.css

@import url('https://fonts.googleapis.com/css?family=Montserrat');

body {
    font-family: 'Montserrat', sans-serif;
    min-height: 100vh;
}

body p {
    font-size: 1.2em;
    color: grey;
}

body h3 {
    font-size: 1.7em;
    color: #242323;
}

body h1 {
    font-size: 2em;
    color: #242323;
}

body h2 {
    font-size: 1.9em;
    color: #242323;
}

html, body {
    width: 100%;
    height: 100%;
}


html {
    font-size: 75%;
}

@media only screen and (max-device-width: 480px) {
    html {
        font-size: 100%;
    }
}

main {
    flex-grow: 1;
}


header, main, footer {
    flex-shrink: 0;
}

.main {
    min-height: 100%;
    display: flex;
    flex-direction: column;
    align-items: stretch;
}

.header {
    display: flex;
    flex-direction: column;
    align-content: space-between;
}

.logo {
   margin: 2em;
   margin-bottom: -6em;
   padding-left:4em; 
   justify-self: baseline;
}

.nav {
    align-self: flex-end;
    justify-content: space-evenly;
    justify-self: baseline;
    margin-right: 25px;
}

.nav h4 {
    padding-top: 25px;
    align-self: flex-start;
    margin-right: 40px;
    font-size: 150%;
}

.nav h4 strong {
    padding-top: 25px;
    font-weight: 800;
}

.nav ul li a {
    text-decoration: none;
    color: #1a1818;
    padding: 20px;
    padding-bottom: 0;
    padding-top: 0;
    flex-wrap: nowrap;
    border-right: 1px solid #ECECEC;
    font-size: 120%;
}

.cta {
    margin-top: 2%;
    background: #66527B;
    min-height: 10em;
    align-items: center;
    justify-content: center;
    display: flex;
    flex-wrap: wrap;
    flex-direction: column;
    flex: 1;
}

.cta h1 {
    padding: 0;
    padding-top: 2%;
    font-size: 2.5em;
    flex-grow: 1;
    flex: 1;
    justify-content: center;
    color: #ECECEC;
}

.cta button {
    min-height: 30px;
    min-width: 10%;
    background-color: #f90;
    border: 2px solid rgb(27, 27, 27);
    color: antiquewhite;
    display: inline-block;
    border-radius: 7px;
    display: inline-block;
    margin: 2%;
    transition: all .3s ease-in-out;
}

.cta button a {
    font-size: 2em;
}

button.orange {
    background: #f90;
    color: #FFF;
    border: 4px solid #f90;
}

button.orange:hover {
    background: #f90;
    color: #FFF;
    border: 4px solid #f90;
    box-shadow: 0 1px #EFEFEF;
}

button.orange:active {
    box-shadow: inset 0 1px 1px rgba(0, 0, 0, 0.3);
}

.text-pannels {
    display: flex;
    padding: 3em;
    border: solid .5em transparent;
    box-sizing: border-box;
    /** relative so that our ::before absolute block can position itself according to it's parent block **/
    position: relative;
}

.text-pannels h3,
p {
    line-height: 1.8em;
}

.text-pannels p {
    padding-bottom: 1em;
}

.text-pannels>div {
    flex: 1;
}

.left-pannel {
    padding-right: 0.5em;
    padding-left: 5em;
}

.right-pannel {
    padding-left: 0.5em;
    padding-right: 5em;
}

horzline {
    color: grey;
}

.footer {
    display: flex;
    justify-content: center;
}

.footer-links a {
    text-decoration: underline;
    color: #b3b3b3;
}

.footer-links a:visited {
    text-decoration: underline;
    color: #b3b3b3;
}