body {
  font-family: Arial, sans-serif;
  background: #f4f6f8;
  margin: 0;
  padding: 0;
}

header {
  background: #2c3e50;
  color: white;
  padding: 15px;
}

nav a {
  color: white;
  margin-right: 15px;
  text-decoration: none;
}

.container {
  padding: 30px;
}

.card {
  background: white;
  padding: 20px;
  border-radius: 6px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.1);
}

input {
  width: 100%;
  padding: 10px;
  margin-top: 10px;
}

button {
  margin-top: 15px;
  padding: 10px;
  background: #3498db;
  color: white;
  border: none;
  cursor: pointer;
}

.error {
  color: red;
  margin-top: 10px;
}

.status {
  background: #27ae60;
  color: white;
  padding: 10px;
  text-align: center;
  font-weight: bold;
  font-size: 14px;
}