html,
body {
  margin: 0;
  padding: 0;
  font-family: 'Oxygen', sans-serif;
  color: #333;
  scroll-behavior: smooth;
}
body * {
  box-sizing: border-box;
}
h1 {
  font-size: 40px;
}
h2 {
  font-size: 30px;
}
h3 {
  font-size: 20px;
}
h1,
h2 {
  margin-top: 0;
}
p {
  font-size: 16px;
  line-height: 1.5em;
}
a {
  color: #428cca;
  text-decoration: none;
}
a:hover {
  color: #3276b1;
}
img {
  max-width: 100%;
}
.container {
  width: 900px;
  margin: 0 auto;
}
.flex {
  display: flex;
  flex-flow: row wrap;
}
.flex .half {  
  display: flex;
  justify-content: center;
  align-items: center;
  width: 50%;
}
.section,
.section-alt {
  padding: 60px 40px;
}
.section {
  background-color: #f9f9f9;
}
.top-section {
  background-color: #e9e9e9;
}
.index ul {
  margin: 0;
  padding-left: 20px;
  list-style: square;
  column-count: 2;
}
.index ul li {
  margin-bottom: 10px;
  font-size: 18px;
  font-weight: 700;
}
.index ul li a {
  color: #428CCA;
  text-decoration: none;
}
.index ul li a:hover {
  text-decoration: underline;
}
.back {
  margin-bottom: 0;
  text-align: right;
}
.back a {
  color: #428CCA;
  font-weight: 700;
  text-decoration: none;
}
.back a:hover {
  text-decoration: underline;
}
.cta {
  position: fixed;
  right: 20px;
  bottom: 20px;
  text-align: center;
}
.cta .button {
  display: block;
  padding: 15px 45px;
  background-color: #00CC51;
  font-size: 20px;
  font-weight: 700;
  color: #fff;
  text-decoration: none;
  text-transform: uppercase;
}
.cta .button:hover {
  background-color: #00993D;
}
header {
  background-color: #e9e9e9;
}
header .container {
  display: flex;
  flex-flow: row wrap;
  justify-content: space-between;
  align-items: center;
  padding: 0;
}
header .logo {
  display: inline-block;
  margin: 10px 0;
  font-size: 20px;
  font-weight: 700;
  line-height: 44px;
}
header a {
  padding: 10px 20px;
  background-color: #428CCA;
  color: #fff;
  font-weight: 700;
  text-decoration: none;
}
header a:hover {
  background-color: #3276b1;
}
footer {
  padding: 40px 40px 80px;
  background-color: #303840;
  color: #fff;
  text-align: center;
}
footer .links {
  margin-bottom: 24px;
  text-align: left;
  list-style: none;
  column-count: 3;
}
@media (max-width: 1024px) {
  .container {
    width: 100%;
  } 
  .section,
  .section-alt {
    padding: 30px 20px;
  }
  header .container {
    padding: 0 20px;
  }
  .flex .half {
    width: 100%;
  }
  .index ul {
    column-count: 1;
  }
  footer .links {
    column-count: 1;
  }
}