body {
    font-family: Arial, sans-serif;
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
    background-color: #f5f5f5;
}
.container {
    background: white;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}
h1 {
    text-align: center;
    color: #333;
    margin-bottom: 30px;
}
.form-group {
    margin-bottom: 20px;
}
label {
    display: block;
    margin-bottom: 5px;
    font-weight: bold;
    color: #555;
}
select, input[type="text"] {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 16px;
}
.btn {
    background-color: #007bff;
    color: white;
    padding: 12px 24px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 16px;
    margin-right: 10px;
}
.btn:disabled {
    background-color: #ccc;
    cursor: not-allowed;
}
.btn-record {
    background-color: #dc3545;
}
.btn-stop {
    background-color: #28a745;
}
.status {
    margin-top: 20px;
    padding: 10px;
    border-radius: 5px;
    background-color: #e9ecef;
}
.result {
    margin-top: 20px;
    padding: 15px;
    border: 1px solid #dee2e6;
    border-radius: 5px;
    background-color: #f8f9fa;
}
.error {
    color: #dc3545;
    background-color: #f8d7da;
    border-color: #f5c6cb;
}
.success {
    color: #155724;
    background-color: #d4edda;
    border-color: #c3e6cb;
}