body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: #0f0f0f;
  color: #fff;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 40px 20px;
}
.menu {
  display: flex;
  gap: 10px;
  margin-bottom: 20px;
}
header {
  text-align: center;
  margin-bottom: 40px;
}
h1 {
  font-size: 2.5rem;
  margin: 0;
  color: #00d4ff;
}
p {
  max-width: 600px;
  text-align: center;
  margin-top: 10px;
  color: #dcdcdc;
}
.card {
  background: #1a1a1a;
  padding: 20px;
  border-radius: 16px;
  width: 100%;
  max-width: 450px;
  box-shadow: 0 0 15px rgba(0, 212, 255, 0.2);
  margin-top: 20px;
}
.btn {
  display: inline-block;
  padding: 10px 16px;
  border-radius: 10px;
  text-decoration: none;
  background: #00d4ff;
  color: #000;
  font-weight: bold;
}