body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  background-color: #f4f4f4;
}

header {
  background-color: #0044cc;
  color: white;
  text-align: center;
  padding: 1rem;
  position: relative;
}

.header-logo {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  height: 60px;
}

.left-logo {
  left: 20px;
}

.right-logo {
  right: 20px;
}

nav {
  background-color: #333;
  overflow: visible;
  position: relative;
  z-index: 100;
  margin: 0;
  border-bottom: none;
}

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

nav ul li {
  display: inline-block;
  position: relative;
}

nav ul li a {
  float: left;
  display: block;
  color: white;
  padding: 14px 20px;
  text-align: center;
  text-decoration: none;
}

nav ul li a:hover {
  background-color: #ddd;
  color: black;
}

nav ul li ul.dropdown {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  background-color: #333;
  min-width: 200px;
  padding: 0;
  margin: 0;
  z-index: 999;
}

nav ul li ul.dropdown li {
  display: block;
}

nav ul li:hover ul.dropdown {
  display: block;
}

.container {
  width: 80%;
  margin: 20px auto;
}

h2 {
  color: #0044cc;
}

section {
  margin-bottom: 30px;
  background-color: #fff;
  padding: 20px;
  border-radius: 8px;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

footer {
  background-color: #333;
  color: white;
  text-align: center;
  padding: 10px;
  position: absolute;
  bottom: 0;
  width: 100%;
}

.board-img {
  width: 180px;
  height: 180px;
  object-fit: cover;
  border-radius: 8px;
}

.challenge-img {
  max-width: 30%;
  height: auto;
  display: block;
}