body {
        font-family: Times New Roman, sans-serif;
        margin: 0;
        padding: 20px;
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        min-height: 100vh;
        text-align: center;
        background-color: #FFDEAD;
    }
    header {
        margin-bottom: 10px;
    }
    h2 {
        color: #333;
        margin-bottom: 30px;
    }
    h1 {
        color: #333;
        margin-bottom: 12px;
    }
    a {
        text-decoration: none;
        color: #361a07;
        font-size: 18px;
    }
    a:hover {
        text-decoration: underline;
    }
    button {
        font-family: Times New Roman, sans-serif;
        min-width: 75px;
        appearance: none;
        border: 0;
        border-radius: 3px;
        background: #b37a54;
        color: #fff;
        padding: 4px 8px;
        font-size: 1rem;
        cursor: pointer;
        margin: 5px;
    }
    button:hover {
        background: #8b5a3c;
    }
    input[type=number] {
        appearance: textfield;
        -moz-appearance: textfield;
    }
    input[type=number]::-webkit-inner-spin-button, 
    input[type=number]::-webkit-outer-spin-button { 
        -webkit-appearance: none;
        margin: 0;
    }
    .form-container {
        background: #fff;
        padding: 20px;
        border-radius: 10px;
        margin-bottom: 20px;
        width: 80%;
        max-width: 800px;
        display: <?php echo $show_form ? 'block' : 'none'; ?>;
        box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    }
    .form-container input, .form-container select {
        margin: 5px;
        padding: 8px;
        font-family: Times New Roman, sans-serif;
        border: 1px solid #ddd;
        border-radius: 3px;
    }
    .form-container input[type="text"] {
        width: 150px;
    }
    .search-container {
        margin-bottom: 20px;
    }
    .add-button-container {
        margin-bottom: 20px;
    }
    table {
        background: #fff;
        margin-top: 20px;
        border-collapse: collapse;
    }
    th {
        background: #b37a54;
        color: white;
        padding: 10px;
    }
    td {
        padding: 8px;
        border: 1px solid #ddd;
    }
    .toggle-form-btn {
        background: #b37a54;
        margin-bottom: 10px;
        padding: 10px 20px;
        font-size: 16px;
    }
    .toggle-form-btn:hover {
        background: #8b5a3c;
    }
    .error-messages {
        background-color: #f8d7da;
        color: #721c24;
        border: 1px solid #f5c6cb;
        border-radius: 5px;
        padding: 10px;
        margin-bottom: 20px;
        text-align: left;
        width: 80%;
        max-width: 800px;
    }
    .error-messages ul {
        margin: 0;
        padding-left: 20px;
    }