body {
  font-family: Arial, sans-serif;
  margin: 0;
  background-color: #fafafa;
  color: #333;
}

header {
  background-color: #008080;
  color: white;
  text-align: center;
  padding: 1.5em 0;
}

nav {
  background-color: #006666;
  padding: 0.5em 0;
}

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

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

nav a {
  color: white;
  text-decoration: none;
  font-weight: bold;
}

nav a:hover {
  text-decoration: underline;
}

main {
  padding: 20px;
}

img {
  max-width: 100%;
  height: auto;
  border-radius: 8px;
}

footer {
  background-color: #008080;
  color: white;
  text-align: center;
  padding: 1em 0;
  margin-top: 20px;
}

.poudarek {
  font-style: italic;
  font-weight: bold;
}