body {
    background: linear-gradient(135deg, #0b3006 0%, #0f3d26 100%);
    font-family: 'Microsoft JhengHei', Arial, sans-serif;
}

.card {
    border-radius: 15px;
    border: none;
}

.card-body h2 {
    color: #333;
    font-weight: bold;
}

.btn-primary {
    background-color: #667eea;
    border-color: #667eea;
}

.btn-primary:hover {
    background-color: #5568d3;
    border-color: #5568d3;
}

.alert {
    border-radius: 10px;
}