:root {
  --white: #fff;
  --dark-grey: #333;
  --link-blue: #0066cc;
}
body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  line-height: 1.6;
}

header {
  background: var(--dark-grey);
  color: var(--white);
  padding: 10px 0;
}

header .logo img {
  width: 150px;
  display: block;
  margin: 0 auto;
}

nav ul {
  list-style: none;
  padding: 0;
  text-align: center;
}

nav ul li {
  display: inline;
  margin: 0 15px;
}

nav ul li a {
  color: var(--white);
  text-decoration: none;
}

.banner {
  background: url("/images/process-flow.jpg") no-repeat center center/cover;
  display: flex;
  color: var(--white);
  text-align: center;
  font-size: 24px;
  padding: 100px 20px;
}

.banner-img {
  position: relative;
  flex: 1 1 0%;
}
main {
  padding: 20px;
}

section {
  margin-bottom: 20px;
}

h2 {
  color: var(--dark-grey);
}

a {
  color: var(--link-blue);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

footer {
  background: var(--dark-grey);
  color: var(--white);
  text-align: center;
  padding: 10px 0;
}