body {
  font-family: 'Roboto', sans-serif;
  margin: 0;
  padding: 0;
  line-height: 1.6;
  color: #333;
  background-color: #f5f7fa;
}

header {
  background-color: #282c34;
  color: #ffffff;
  padding: 20px;
  text-align: center;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  position: sticky;
  top: 0;
  z-index: 1000;
}

header h1 {
  margin: 0;
  font-size: 2.5em;
  font-weight: 300;
}

nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  justify-content: center;
  padding-top: 10px;
}

nav ul li {
  margin: 0 15px;
}

nav ul li a {
  text-decoration: none;
  color: #ffffff;
  font-weight: 500;
  font-size: 1.2em;
  transition: color 0.3s, transform 0.3s;
}

nav ul li a:hover {
  color: #61dafb;
  transform: scale(1.1);
}

main {
  padding: 40px 20px;
  background: #ffffff;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
  margin: 20px auto;
  border-radius: 8px;
  max-width: 800px;
  animation: fadeIn 1s ease-in-out;
}

footer {
  background-color: #282c34;
  color: #ffffff;
  text-align: center;
  padding: 15px;
  position: center;
  width: 96%;
  bottom: 0;
  box-shadow: 0 -2px 4px rgba(0, 0, 0, 0.1);
}

.prev, .next {
  cursor: pointer;
  position: absolute;
  top: 50%;
  padding: 16px;
  color: white;
  font-weight: bold;
  font-size: 18px;
  transition: background-color 0.3s;
  user-select: none;
  background-color: rgba(0, 0, 0, 0.5);
  border-radius: 50%;
}

.prev {
  left: 10px;
  transform: translateY(-50%);
}

.next {
  right: 10px;
  transform: translateY(-50%);
}

.prev:hover, .next:hover {
  background-color: rgba(0, 0, 0, 0.8);
}

@keyframes fadeIn {
  from {
      opacity: 0;
  }
  to {
      opacity: 1;
  }
}

a {
  color: #61dafb;
  text-decoration: none;
  transition: color 0.3s;
}

a:hover {
  color: #21a1f1;
}

button {
  background-color: #61dafb;
  border: none;
  color: white;
  padding: 10px 20px;
  text-align: center;
  text-decoration: none;
  display: inline-block;
  font-size: 16px;
  margin: 4px 2px;
  cursor: pointer;
  border-radius: 4px;
  transition: background-color 0.3s;
}

button:hover {
  background-color: #21a1f1;
}