body {
  margin: 0;
  font-family: Arial, sans-serif;
  background-image: url('../800_686ab5864d578.png');
  background-size: cover;
  background-repeat: no-repeat;
  background-position: center;
  direction: rtl;
  color: white;
}

nav ul {
  list-style: none;
  padding: 0;
  display: flex;
  justify-content: center;
  background-color: rgba(0, 0, 0, 0.6);
  margin: 0;
}

nav ul li {
  margin: 10px;
  padding: 10px 20px;
  background-color: #333;
  border-radius: 30px;
}

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

main {
  padding: 50px 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.card {
  background-color: rgba(0, 0, 0, 0.7);
  border-radius: 15px;
  padding: 20px;
  margin: 20px;
  width: 300px;
  text-align: center;
  box-shadow: 0 0 15px rgba(255,255,255,0.1);
}