body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: linear-gradient(to right, #667eea, #764ba2);
  color: white;
}

nav {
  background: rgba(0,0,0,0.4);
  padding: 15px;
  display: flex;
  justify-content: space-between;
}

nav button {
  background: transparent;
  border: none;
  color: white;
  margin: 0 10px;
  font-size: 16px;
  cursor: pointer;
}

.container {
  padding: 30px;
}

.card {
  background: white;
  color: black;
  padding: 20px;
  border-radius: 12px;
  margin: 20px auto;
  width: 60%;
  box-shadow: 0 6px 15px rgba(0,0,0,0.2);
}

input, button {
  padding: 10px;
  margin: 5px;
  border-radius: 5px;
  border: none;
}

button {
  background: #4a00e0;
  color: white;
  cursor: pointer;
}