body {
  font-size: 16px;
  font-family: "Oswald", sans-serif;
  background-color: #cfedf7;
}

header {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  background-color: #3d96fc;
}

header,
footer {
  color: #ffffff;
}

header,
nav,
main,
footer {
  max-width: 100%;
  margin: 0 auto;
}

.logo {
  width: 150px;
  height: auto;
}

h1 {
  font-size: 2.1rem;
}

nav {
  background-color: #1580fa;
  text-align: center;
}

nav ul {
  list-style-type: none;
  margin: 0;
  padding: 0;
  overflow: hidden;
}

nav ul li a {
  display: block;
  padding: 1rem;
  text-decoration: none;
  font-size: 1.2rem;
  color: #ffffff;
}

a:hover {
  background-color: #414141;
  padding: 1rem;
}

a:active {
  color: #ffff00;
}

footer {
  text-align: center;
  background-color: #3d96fc;
  padding: 1rem;
  font-size: 1.2rem;
}

footer a:visited {
  color: #ffff00;
}

footer p {
  color: #ffff00;
}

.content1 h2 {
  font-size: 1.3rem;
  padding: 1.5rem;
}

.content1 main p {
  border-radius: 20px;
  padding: 2rem;
}

.content1 main h3 {
  text-align: center;
  font-size: 1.1rem;
}

.content1 main img {
  max-width: 100%;
  height: auto;
}

.content2 main {
  padding: 2rem;
}

.content2 main img {
  max-width: 200px;
  height: auto;
}

.colors {
  max-width: 100%;
  height: auto;
  padding: 1rem;
  text-align: center;
}

.color1 {
  background-color: #3d96fc;
  color: #ffffff;
}

.color2 {
  background-color: #1580fa;
  color: #ffffff;
}

.color3 {
  background-color: #414141;
  color: #ffffff;
}

.color4 {
  background-color: #cfedf7;
}

.color5 {
  background-color: #ffff00;
}

.color6 {
  background-color: #ffffff;
}

.color7 {
  background-color: #000000;
  color: #ffffff;
}

.content4 main {
  padding: 1rem;
}