style.css

@import url("https://fonts.googleapis.com/css?family=Montserrat:400,700|Roboto&display=swap");

:root {
  --yellow: #f4d35e;
  --orange: #ee964b;
  --blue: #28afb0;
  --white: #e4dfda;
  --black: #1f271b;
}

img {
  max-width: 100%;
}

.avatar img {
  border-radius: 50%;
}

div.bg-255-255-255-0 {
  background-color: #eee;
}

main {
  background-color: var(--white);
}

a {
  color: var(--black);
  font-weight: bold;
  text-decoration: none;
  border-bottom: 2px solid;
}

a:hover {
  background-color: var(--orange);
  border-top: 4px solid var(--orange);
  border-bottom: 4px solid var(--orange);
}

footer a {
  border-bottom: 2px solid !important;
  border-top: none !important;
}

nav a.s {
  border-top: 4px solid transparent;
  border-bottom: 4px solid transparent;
  padding: 0 5px;
}

nav a.s:focus {
  background-color: var(--yellow);
  border-top: 4px solid var(--yellow);
  border-bottom: 4px solid var(--yellow);
}

h2 {
  border-left: solid 20px var(--blue);
  padding-left: 10px;
}

body h3,
body h3+p,
body h3+p+ul,
body h3+p+ul+h4 {
  background-color: var(--yellow);
  margin: 0;
  padding: 15px 20px;
}

body h3+p+ul {
  font-weight: bold;
  list-style: none;
  padding: 0 20px 20px 20px;
}

body h3+p+ul li {
  margin-bottom: 10px;
}

body h3+p+ul+h4 {
  padding-bottom: 30px;
  text-align: center;
  margin: auto;
}

body h3+p+ul+h4 a {
  background: var(--orange);
  background-clip: padding-box;
  border: 4px solid transparent;
  display: inline-block;
  padding: 10px 20px;
}

body h3+p+ul+h4 a:hover {
  border: 4px dashed var(--blue);
}

code {
  background: white;
  border-radius: 5px;
  display: block;
  font-size: 14px;
  overflow-x: auto;
  padding: 5px;
}