body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: linear-gradient(to bottom, #121212, #2c2c2c); /* black to dark gray */
  color: #ffffff;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 30px;
  min-height: 100vh;
}

header {
  width: 100%;
  text-align: left;
}

button {
  padding: 10px 20px;
  margin-bottom: 20px;
  background-color: #007bff; /* blue button */
  color: white;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  font-size: 16px;
}

button:hover {
  background-color: #0056b3;
}

main {
  max-width: 600px;
  background: #1f1f1f; /* dark gray card background */
  padding: 30px;
  border-radius: 12px;
  box-shadow: 0 0 10px rgba(0,0,0,0.3);
}

h1 {
  text-align: center;
  margin-bottom: 20px;
  color: #ffffff;
}

.info p,
.info ul {
  margin: 10px 0;
  color: #dddddd;
}

ul {
  padding-left: 20px;
}