public/stylesheets/main.css

html {
  background: #a5c9e5;
  background: radial-gradient(ellipse at center, #a5c9e5 0%,#7292b0 100%);
}
body {
  align-items: center;
  display: flex;
  font-family: 'Open Sans', sans-serif;
  font-size: 0.9em;
  font-weight: 300;
  flex-direction: column;
  justify-content: center;
}
h1, h2, h3, h4, h5, h6 {
  font-weight: 400;
}
a {
  color: #557491;
}
a:hover {
  color: #333;
}
p {
  line-height: 1.6;
}
.container {
  background-color: #f6f4f0;
  border: 20px solid #fff;
  margin: 0 0 4em;
  width: 70vh;
}
.header-logo {
  display: block;
  margin: 4em auto 1em;
}
.header-logo img {
  width: 4em;
}
.header {
  background-color: #fff;
  overflow: hidden;
  padding: 1em 0;
  text-align: center;
}
.header-nav {
  list-style: none;
  margin: 0;
}
.header-nav li {
  display: inline-block;
  margin: 0 1.5em;
}
.header-nav a {
  color: #333;
  font-size: 0.8em;
  text-decoration: none;
  text-transform: uppercase;
}
.header-nav a:hover {
  color: #7292b0;
  text-decoration: underline;
}
.content {
  padding: 2em 3em;
}
.sator-square {
  display: block;
  margin-top: 3em;
}
.sator-square img {
  display: block;
  margin-left: auto;
  margin-right: auto;
  width: 90%;
}
.form-submit {
  background-color: #7292b0;
  border: 0;
  box-shadow: 0 3px 0 0 rgba(0,0,0,0.1);
  color: #fff;
  display: block;
  margin: 3em auto 0;
  outline: none;
  padding: 1em 2em;
  text-transform: uppercase;
}
.form-submit:active {
  box-shadow: 0 0 0 0 rgba(0,0,0,0);
}
.result {
  color: #fff;
  padding: 1.5em 2em;
  text-align: center;
}
.result-success {
  background-color: #7292b0;
}
.result-fail{
  background-color: #e67642;
}