style.css

* {
  padding: 0;
  margin: 0;
  box-sizing: border-box;
}
body {
  background-color: rgb(126, 10, 10);
}
a,
h1,
h2,
h3 {
  text-decoration: none;
  font-family: "Gill Sans", "Gill Sans MT", Calibri, "Trebuchet MS", sans-serif;
}
.persistent-header {
  background-color: rgb(126, 10, 10);
  color: white;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 3%;
}
.footer-nav {
  text-align: center;
}
.footer-list {
  color: white;
}
.links-list li {
  display: inline-block;
}
.links-list a {
  color: white;
}
.main-content {
  width: 75%;
  margin: 0 auto;
  background-color: red;
  padding: 10px 60px 45px;
}
.main-content > h2 {
  color: black;
  font-weight: 300;
  margin-bottom: 10px;
}
.main-content > hr {
  margin-bottom: 25px;
}
.main-content section {
  background-color: grey;
  margin-bottom: 30px;
  padding-top: 20px;
}
.main-content section hr {
  width: 90%;
  margin: 0 auto;
  border-color: red;
}
.main-content section h3 {
  margin-left: 5%;
  font-size: 28px;
  font-weight: 400;
}
.section-content {
  padding: 13px;
  padding-left: 5%;
}
.section-content p {
  margin: 10px;
  margin-left: 0;
  line-height: 1.4;
  font-size: 18px;
  font-family: sans-serif;
}
.section-content img {
  float: right;
  margin-left: 10px;
  margin-top: 10px;
}
section:nth-of-type(2) .section-content img {
  float: left;
  margin-left: 0;
  margin-right: 10px;
}
h4 {
  text-align: center;
  color: white;
}