aside, article, section, header, footer, nav, html, body, p, h1, h2, h3, div, ul {
    margin: 0;
    padding: 0;
    font-size: 24px;
    font-family: sans-serif;
}

body {
    background-color: #E9F0F1;
}

a, a:link, a:visited, a:active {
    display: block;
    text-decoration: none;
    color: #000;
}

a:hover {
    color: #263D81;
}

h1 {
    font-family: "Tahoma", sans-serif;
    margin-left: 20%;
    font-size: 72px;
    color: #263D81;
}

h2 {
    font-family: "Tahoma", sans-serif;
    font-weight: 200;
    margin-left: 20%;
    font-size: 40px;
    color: #263D81;
}

h3 {
    font-family: "Tahoma", sans-serif;
    font-weight: 300;
    margin-left: 20%;
    font-size: 30px;
    color: #263D81;
}

h4 {
    font-size: 30px;
}

p {
    margin: 0;
    padding: 0;
    font-family: Helvetica, Arial, sans-serif;
    padding-bottom: 20px;
}

a.il {
    display: inline-block;
}

.sec {
    margin-left: 20%;
    margin-right: 20%;
    padding-top: 20px;
}

.tl {
    font-size: 16px;
}

.smallgap {
    display: block;
    height: 20px;
}

.biggap {
    display: block;
    height: 100px;
}

.cent {
    display: block;
    text-align: center;
}

@media only screen and (max-width: 850px) {
  
h1 {
    margin: 0;
    text-align: center;
    font-size: 40px;
    }

h2 {
    margin: 0;
    text-align: center;
    font-size: 30px;
}

h3 {
    margin: 0;
    text-align: center;
    font-size: 20px;
}

h4 {
    font-size: 22px;
}

p {
    font-size: 18px;
}

.sec {
    margin-left: 7%;
    margin-right: 7%;
    padding-top: 20px;
}

}