body {
  background: #0b0c10;
  color: #66fcf1;
  font-family: Arial;
  text-align: center;
  padding: 20px;
}

h1 {
  color: #45a29e;
}

.nav a {
  margin: 10px;
  padding: 10px 20px;
  background: #1f2833;
  color: white;
  text-decoration: none;
  border-radius: 5px;
}

.nav a:hover {
  background: #45a29e;
}

.box {
  background: #1f2833;
  padding: 20px;
  margin: 20px auto;
  width: 60%;
  border-radius: 10px;
}

button {
  padding: 10px 20px;
  margin: 5px;
  background: #45a29e;
  border: none;
  color: black;
  cursor: pointer;
}

.footer {
  margin-top: 40px;
  font-size: 12px;
  color: gray;
}