body {
    font-family: Arial, sans-serif;
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
    background-color: #f5f5f5;
}

.container {
    background-color: white;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    margin-bottom: 20px;
}

h1 {
    color: #333;
    text-align: center;
}

h2 {
    color: #666;
    border-bottom: 2px solid #eee;
    padding-bottom: 10px;
}

button {
    background-color: #007bff;
    color: white;
    border: none;
    padding: 10px 15px;
    border-radius: 4px;
    cursor: pointer;
    margin: 5px;
}

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

button.danger {
    background-color: #dc3545;
}

button.danger:hover {
    background-color: #c82333;
}

input, select {
    padding: 8px;
    margin: 5px;
    border: 1px solid #ddd;
    border-radius: 4px;
}

.form-group {
    margin: 10px 0;
}

label {
    display: inline-block;
    width: 100px;
    font-weight: bold;
}

#dataList {
    background-color: #f8f9fa;
    border: 1px solid #dee2e6;
    border-radius: 4px;
    padding: 10px;
    max-height: 300px;
    overflow-y: auto;
}

.data-item {
    background-color: white;
    margin: 5px 0;
    padding: 10px;
    border-radius: 4px;
    border-left: 4px solid #007bff;
}

.data-item strong {
    color: #333;
}

.status {
    margin: 10px 0;
    padding: 10px;
    border-radius: 4px;
}

.status.success {
    background-color: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.status.error {
    background-color: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}