body {
    font-family: Arial, sans-serif;
    background-color: #f4f4f9;
    color: #333;
    margin: 0;
    padding: 0;
}

.container {
    max-width: 800px;
    margin: 20px auto;
    padding: 20px;
    background-color: #fff;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

h1 {
    font-size: 24px;
    margin-bottom: 20px;
}

.form-group {
    margin-bottom: 15px;
}

label {
    display: block;
    margin-bottom: 5px;
}

input, select, button {
    width: 100%;
    padding: 10px;
    margin-top: 5px;
    border: 1px solid #ccc;
    border-radius: 4px;
}

button {
    background-color: #007bff;
    color: #fff;
    border: none;
    cursor: pointer;
}

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

.tab-button {
    display: inline-block;
    padding: 10px 20px;
    margin-right: 5px;
    background-color: #e9ecef;
    border: 1px solid #ccc;
    border-radius: 4px;
    cursor: pointer;
}

.tab-button.active {
    background-color: #007bff;
    color: #fff;
}

.tab-content {
    display: none;
    margin-top: 20px;
}

.tab-content.active {
    display: block;
}

.hidden {
    display: none;
}